1. The principle of temperature reducing device
The temperature and pressure reduction means for reducing the temperature of high-temperature steam to the steam parameters necessary for a user, including a temperature reducing device and a pressure reducing device.
The Chenxuan TP series temperature reduction and decompression device is designed with advanced foreign technology. Its unique design can meet the needs of the production process site. For example, the production process site generally requires pressure and temperature to remain stable when load changes to ensure that the downstream use of steam equipment normal operation and to avoid quality accidents.
The decompression device is a part of decompressing the high-pressure steam to the user's desired pressure. The pressure sensor, pressure controller, multi-function controller, and throttle device are installed on the downstream of the steam pipeline. After monitoring the decompressed steam pressure, the PI (Proportional Integral) mode regulates the opening of the valve. The downstream steam pressure can remain stable when the upstream pressure and the downstream load change.
The desuperheating device is the realization part of the steam temperature reduction, which is composed of a desuperheating body and a disappearing water system. The dissipating body directly accesses the steam pipe.
The superheated water is pumped into the desuperheating body by the high pressure of the pump. The atomized fine water droplets are sprayed through the nozzles mix with the superheated steam, gasify so that it can absorb the heat energy of the superheated steam and reduce the temperature of the superheated steam.
Imported professionally designed nozzles are made of stainless steel with rotating blades inside. The water droplets are forced and forcefully supported. The screw movement is uniform, and the particles are fine and uniform. The atomization effect is remarkable.
According to the feedback signal of the downstream temperature sensor, the control system PI mode adjusts the waterway regulating valve and also adjusts the disappearing water volume to bring the steam temperature closer to the set value.
2. The main features
1) The temperature-reducing probe is directly inserted into the steam pipe, which has a compact structure and exquisite workmanship.
2) US imports of special nozzles, superheated water spray uniform solid cone, atomized particles small, the largest particles 300μ, bearing screw movement, is conducive to steam absorption, effectively avoiding cavitation/flashing.
3) Fully suitable for steam flow changes in the field, steam flow change ratio up to 20:1.
4) The desuperheater probe is made of stainless steel material, which has strong anti-fatigue ability, impact resistance and long service life.
5) The desuperheating water control valve and actuator are imported from Germany. The performance is stable and the action is sensitive.
3. Technical requirements
1) When the steam temperature is lower than the saturated steam temperature, the superheated water will no longer evaporate. We recommend that the superheated steam be at a temperature above the minimum 5°C saturated steam to obtain dry steam.
2) The desired water is condensed water or demineralized water, and the disappearing water pressure is higher than the steam pressure by a minimum of 0.4 MPa, so that the desired water achieves the best atomization effect.
The temperature-reducing and pressure-reducing device is equipped with a well-functioning thermal control cabinet, which can control the steam temperature, pressure, and temperature-reducing water pump, and can realize the following functions:
1) Downstream steam temperature automatic control
2) Downstream steam pressure automatic control
3) Steam high temperature alarm
4) Steam high pressure alarm
5) Automatic power-off protection, closing the pressure reducing valve
6) Cooling water pump start/stop button
4. The alarm function
Multifunctional digital controller with complete alarm function
1) temperature limit alarm
2) Lower temperature alarm
3) Pressure limit alarm
4) Lower pressure alarm
5. Features
1) Streamlined design, beautiful, standard GGD production
2) Original imported Siemens controller, high control accuracy, stable and reliable
3) Can add touch screen according to user needs
4) According to user needs to increase communication capabilities
5) Compact structure, simple operation, and full realization of "unattended" function
6) Internal electrical components mainly use German Siemens, Merlin Gerin, and strive to reliable electrical operation
6. Protection class
Complies with IP54 standard, the controller can work in harsh environmental conditions.
1) Smooth regulation in the range of flow of 10 to 100°C.
2) Export steam pressure P2: adjustment accuracy is not less than 1.0.
3) Export steam temperature T2: adjustment accuracy is not less than 1.5
4) Noise: In the normal operation, one meter downstream of the temperature reducing and pressure reducing valve, and one meter away from the pipeline, the noise is less than 80dBA.
7. The implementation of standards
1) [Temperature and pressure reduction device technical conditions] JB/T6323-92
2) [Power station valve technical conditions] JB/T3595-93
3) [Pipe flange Technical conditions] JB/T74-94
4) [Pipe flange type] JB/T74-94
5) [Asbestos Rubber Gasket for Pipe Flange] JB/T87-94
6) [Convex panel type flat welded steel flange] JB/T81-94
