1、 Structural characteristics

The heat exchange element of the shell and tube heat exchanger adopts stainless steel variable cross-section corrugated tubes, which have the ability to change the flow state of the medium, form strong medium disturbances inside and outside the tube, reduce the thickness of the stagnant layer, and form sufficient turbulence. Compared with traditional light tube heat exchange tubes, the heat transfer efficiency is improved by 2-3 times. Due to the relatively large diameter and automatic axial compensation of corrugated heat exchange tubes, it ensures that the tubes are less prone to scaling and blockage, reduces pressure loss, automatically compensates for and eliminates thermal stress, reduces equipment maintenance costs, and improves the service life of stainless steel components due to their corrosion resistance. The overall efficiency is high, thus achieving the effect of cost reduction and investment savings. 2. Design selection

The selection of heat exchangers should consider whether the design pressure, working temperature, working medium, and actual required heat transfer and pressure loss meet the requirements at the same time. When on-site installation conditions permit, slender heat exchangers should be selected as much as possible to improve the time and process of sufficient medium exchange. When the actual calculation of working condition data and sample grading are tightened to ensure the needs of the work. 3、 Installation, use and maintenance

A install

1. Check the random accessories and technical documents of the heat exchanger.

2. Gain a detailed understanding of the user manual.

3. There should be sufficient space at both ends of the installation location for easy maintenance.

4. Pre embed foot bolts according to the size of the equipment base.

5. Leave enough space for adjusting the activity pad, ensuring that the equipment is leveled, and firmly fix the equipment after leveling.

B test run

After cleaning the system pipeline, the system is securely connected to the equipment. The inlet of the heat exchanger should be equipped with a filtering device and temporary bypass should be considered.

2. When driving, first open the inlet and outlet valves of the heated medium, start the cold side circulating pump, and after it is normal (without leakage or abnormality), slowly open the hot side valve, discharge steam, and then close it.

3. When the test heat medium enters, it should be slowly heated up to avoid thermal shock or excessive pressure.

After the test temperature is normal, the heat exchanger bolts can be tightened.

C maintenance

1. The normal operating pressure should be within the allowable working pressure on the equipment nameplate, and a pressure gauge monitoring or pressure protection device should be installed.

During system cleaning, the inlet and outlet valves should be closed to prevent cleaning solution from entering the heat exchanger.

3. When the system stops working, the medium inside the heat exchanger must be completely drained to prevent corrosion of the equipment, especially during the winter shutdown, the working medium must be completely drained to prevent frost cracking.

When cleaning the heat exchanger, the chloride ions in the cleaning solution should not exceed 25ppm. After cleaning, the cleaning solution should be removed and cleaned. Before assembly and use, a pressure test at 1.25 times the nominal pressure should be conducted, and there should be no leakage or abnormalities for 60 minutes.