Floating coil heat exchanger

I GZG type high-frequency vibration tube heat exchanger (floating coil heat exchanger)

Overview:

GZ type high frequency vibrating tube heat exchanger is used for steam-water heat exchange, and its heat transfer element is cantilever floating coil structure. During the heating process, due to the centrifugal force of steam in the coil, the coil tube bundle generates a high-frequency vibration, prompting the heated medium to stir, destroying laminar heat transfer, resulting in high heat transfer capacity, and the heat transfer coefficient K is about 3000 W/m2℃. At the same time, because the coil is the free end of the cantilever, it expands and contracts freely, resulting in high-frequency vibration, which makes the alkaline attachments leave the tube wall automatically, forming the characteristic of automatic descaling.

Performance features:

◆ High heat transfer efficiency, heat transfer coefficient K is about 3000 W/m2℃.

◆ The equipment is compact in structure, small in volume and small in floor area, and there is no need to reserve the space for drawing out the tube bundle.

◆ It solves the cumbersome traditional descaling process and can automatically descale.

◆ The shell temperature is low, the heat loss is small, and it has condensate supercooling device. When it is used in hot water supply, it is not necessary to install hydrophobic device, which saves energy and time, and has obvious economic and social benefits.

Design instructions:

1. This heat exchanger is suitable for heating, air conditioning and hot water supply systems of high-class hotels, restaurants, institutions, factories, schools, military units, hospitals and industrial and civil buildings such as chemical industry, oil refining and shipbuilding.

2. Material: stainless steel 1Cr18Ni9Ti or carbon steel is selected for the shell, and the heat transfer tube is red copper tube.

3. As the heat exchanger has high heat transfer efficiency, a temperature regulator is installed on the steam inlet pipeline of the heat exchanger to control the steam flow and hot water temperature. Especially the hot water supply system, in order to ensure personal safety, temperature control is more necessary.

4. In case of centralized gas supply from the city, in order to stabilize the pressure behind the valve and ensure the safe operation of the heat exchanger, a pressure regulator should be installed in front of the equipment.

5. To ensure the better circulation capacity of the heat exchanger and the reliable function of the temperature regulator, a filter must be installed before the temperature regulator.

6. This equipment has the function of automatic descaling, but there may still be some scales in some corners that can't fall off. It should be cleaned once every six months. After cleaning, the thermal shock method can be used, as follows:

① Drain the water in the shell.

② Close the water inlet and outlet.

③ Open the inlet valve and condensate valve to drain the water in the pipe, then close the condensate valve. After about 5-6 minutes, suddenly close the inlet valve, open the top cold water valve and the bottom blowdown valve, so that the heating pipe suddenly cools down, and at the same time, remove the scale. After 5-6 times in a row, all the water can be removed, and the equipment continues to be put into operation.

7. Lifting equipment must be used for transportation and installation of heat exchanger, and rolling is strictly prevented. The heat exchanger should be fixed firmly with the foundation to prevent vibration during operation, and maintenance space should be reserved around the heat exchanger.

8. Model representation method:

　　GZG（GZGS） — R（N¨K） — 5.11

Said the heat transfer area is 5.11m2；; R for hot water supply (N for heating and heat exchange, K for air conditioning and heat exchange); GZG(GZGS see below) represents high-frequency vibration tube heat exchanger.

Precautions for operation:

★ When starting to use, fill the system with cold water first.

★ After the cylinder is filled with water, the steam valve can be opened for air supply. In intermittent use, the valve must be opened slowly every time until it runs smoothly. Do not open the valve too fast, so as not to cause water hammer and damage the equipment.

★ When stopping operation, close the steam valve first, and then close the cold water valve.

★ In case of poor drainage, open the steam valve, and close the vent valve when the drainage is finished.

II. GZGS Type High Frequency Vibrating Tube Heat Exchanger

Overview:

GZGS type high frequency vibrating tube heat exchanger is used for water-water heat exchange. It uses coil to strengthen heat transfer to the strong disturbance of water flow, and improves the heat transfer coefficient. The heat transfer coefficient is as high as 2200 kcal/hm2℃, and the volume is small. It makes full use of the heat source by using the same water flow up and down, and improves the thermal efficiency, making the thermal efficiency more than 95%.

Structural form:

GZGS type high-frequency vibrating tube heat exchanger is composed of upper and lower heads, cylinder, heating coil, heating inlet pipe and outlet pipe, etc. The cylinder is divided into two series of carbon steel and stainless steel, and the coil is bent with red copper pipe.

The heated water enters the parallel floating coil from the inlet pipe from bottom to top, and after rotating and flowing in all layers of coils, it enters the outlet pipe from top to bottom and flows out.