Water cooled screw cascade refrigeration unit

1、 Product Introduction

　　Water cooled screw cascade refrigeration unitIt is a refrigeration unit designed in a cascade manner using a cooling tower to condense circulating water, with a temperature control range of -40 degrees to -120 degrees. It needs to be used together with a cooling tower.

The water-cooled screw cascade refrigeration unit is used in the following processes and industries:

Pharmaceutical intermediates, agrochemicals, petrochemicals, antibiotics, vitamins, etc;

Silicon industry, new energy, lithium hexafluorophosphate and other new energy materials;

Industrial refrigeration fields such as low-temperature impact testing, vacuum coating, oil and gas recovery, and low-temperature rubber crushing;

In processes that require temperature control, such as low-temperature cooling of reaction heat, crystallization and condensation processes, condensation of volatile vapors, high vacuum distillation processes, glass coating, composite glass manufacturing, rubber crushing, etc;

Low temperature quenching in the metal heat treatment industry;

Low temperature testing of components in industries such as automobiles and electronics;

Low temperature recovery of oil and gas in the petrochemical industry.

2、 Product images

3、 Characteristics

1. The wide range of refrigeration temperature applications includes three different refrigeration temperatures: -40 ℃ to -65 ℃, -60 ℃ to -85 ℃, and -75 ℃ to -95 ℃, meeting the needs of different temperature processes;

2. Multiple imported brand compressors to choose from, with reasonable configuration

According to the required refrigerating capacity and the actual operating temperature, the single-stage screw compressor and two-stage screw compressor are optimized from the perspective of energy saving and initial investment saving. The main brands are Germany Bitzer, Taiwan, China Hanbell, Taiwan, China Fusheng, etc. Multiple combinations, reasonable configuration, and improved overall efficiency; Especially in the low-temperature range of cascade (-75 ℃~-95 ℃), the low-temperature stage compressor adopts two-stage compression refrigeration;

3. Multiple refrigerants to choose from

High temperature refrigerants are suitable for refrigerants such as R22 and R404A;

4. High reliability

Using a semi enclosed compressor as the main engine not only improves the operating efficiency of the compressor itself, but also avoids leakage problems when starting the compressor, reduces after-sales service costs such as refrigerant addition and shaft seal replacement, and enhances the reliability and ease of operation of the product's long-term continuous operation;

5. Fully automated control

Adopting Siemens industrial grade PLC controller and LCD touch screen for fully automatic operation, it has functions such as automatic/manual control, parameter setting and calibration, data recording, fault alarm and recording, and cumulative running time recording. It can be automatically controlled without the need for dedicated personnel management;

6. Efficient and energy-saving

The large cooling unit adopts a semi enclosed screw compressor with an economy exchanger to improve operating efficiency. At the same time, the low-temperature evaporator and condenser can use imported brand 316L stainless steel plate heat exchangers, and electronic expansion valves are used for precise adjustment of refrigerant to ensure efficient and energy-saving operation of the unit at both partial and full loads;

7. Convenient energy regulation

On the basis of the compressor's own energy regulation, it is equipped with a dedicated hot gas bypass energy regulation;

8. Convenient installation and debugging

Most of the units are assembled as a whole in the factory and filled with refrigerant. After a load test of no less than 8 hours, it ensures that the user can start up successfully on site in one go;

9. Professional energy-saving operation plan for technical expertise

We can customize the freezing process according to the different needs of users and provide professional products suitable for them. For example, if one machine has multiple temperatures and requires both -20 ℃ to -30 ℃ and -40 ℃ to -80 ℃ for process use, the function of single-stage cooling or two-stage cooling can be added to users, fully saving operating costs; If it is often necessary to cool down from room temperature to low temperature, the high-temperature stage of the cascade unit can be pre cooled to a certain set temperature before switching to the low-temperature system for operation, fully saving operating costs; For example, oil and gas recovery or fresh air treatment to a certain low temperature can be operated simultaneously with pre cooling and low-temperature refrigeration, saving users initial investment and operating costs.