Introduction to the renovation of tube and core exchange in volumetric heat exchangers:

-U-shaped pipes are commonly used as cooling pipes for heat exchange tubes. Stainless steel U-shaped pipes are mainly used for various electrical instruments, condensers, heat exchange equipment, heat exchangers, low-pressure heaters, volumetric heat exchangers, boiler related auxiliary equipment, superheaters, heat exchangers, and refrigerators, and are made of welded austenitic stainless steel pipes. Material selection: Stainless steel pipes, brass pipes, purple copper pipes, white copper pipes, aluminum alloys, 20G, carbon steel pipes, boiler pipes and other components for heat transfer pipelines, which have applications in petroleum, chemical, air conditioning, thermal power, nuclear energy and other projects. The stainless steel U-shaped pipes provided by Lianyungang Lingdong have complete specifications and group spacing. Mainly produces stainless steel austenite - types: 304 stainless steel U-shaped pipe/304L stainless steel U-shaped pipe, 316 stainless steel U-shaped pipe/316L stainless steel U-shaped pipe, etc.

Overview of volumetric heat exchangers:

A volumetric heat exchanger mainly consists of a body, steam coil components, steam inlet and outlet, cold and hot water inlet and outlet, etc. In order to prevent surface corrosion inside the exchanger, a anti-corrosion alloy layer is sprayed on the surface, and a paint layer is brushed on the alloy layer. In addition, the original pipe box is removed, and the steam coil is directly connected to the outside through a flange, so that this type of heat exchanger has a simple and reasonable structure, long service life, heat exchange efficiency, and energy conservation.

Positive displacement heat exchanger -:

1. The temperature drop of the heat medium in a volumetric heat exchanger is significant. During soda water heat exchange, the outlet temperature of the condensate is about 50 ℃, and a drain should be installed above and below the return pipe to facilitate maintenance. During water water heat exchange, the temperature drop is 2-2.5 times that of the same type of heat exchanger, and after heat exchange with high-temperature hot water at 120-150 ℃, it can drop to 70-75 ℃.

2. Positive displacement heat exchanger results in heat exchange and heat dissipation, with low heat loss and energy saving. At the same time, when steam is used as the heat medium, about 15% of the total heat exchange can be recovered from the condensed water heat.

3. The cold water area is small, and the volume utilization rate is high.

4. The volumetric heat exchanger maintains a large water storage capacity, low head loss, safe and stable water supply, and facilitates scale removal.

Transformation form of tube and core exchange for volumetric heat exchangers:

We are a manufacturer of stainless steel heat exchange tubes, cooling tubes, and finned tubes for volumetric heat exchangers. We have undertaken large-scale condensers, oil coolers, high-pressure heaters, low-pressure heaters, siphons, gland heaters, fixed tube plate heaters, U-shaped tube heaters, coil heaters, volumetric heat exchangers, water, steam, and hot water heat exchangers, air coolers, air coolers, tube heat exchangers, marine oil coolers, and floating head heat exchangers, Evaporator and other pipe and core replacement renovation projects. Material of heat exchange tubes for volumetric heat exchangers: 20G tubes, stainless steel tubes (304316L, etc.), copper tubes, brass tubes, white copper tubes, and titanium tubes. The volumetric heat exchanger can directly replace the core, tube plate, and tube bundle. The tube bundle is a straight tube, and we can also replace it with a U-shaped tube, depending on the original equipment. Too large volumetric heat exchangers can be replaced on site with tube bundles. In order to improve the speed of tube replacement and save time, small equipment is directly shipped to the company for replacement.

Positive displacement heat exchanger tube potential:

Positive displacement heat exchanger tubes - U-shaped tubes are mainly used for condensers, heat exchangers, low-pressure heaters, positive displacement heat exchangers, boiler related auxiliary equipment, superheaters, heat exchangers, and refrigerators using welded austenitic stainless steel pipes. Positive displacement heat exchanger tubes - usually U-shaped tubes are used as cooling tubes for heat exchange tubes. The materials used include stainless steel tubes, brass tubes, purple copper tubes, white copper tubes, 20G, carbon steel pipes, boiler tubes, etc.

Positive displacement heat exchanger - manufacturing -

(1) Install an improved high-speed heat exchanger into the heat storage container, completely separating the heat exchanger from the container. The two are connected inside the container by an outlet pipe located on the shell of the heat exchanger.

(2) The heat exchange tube of the volumetric heat exchanger is a U-shaped structure, which can significantly increase its K value and increase the heat exchange area, while maintaining a suitable net distance between U-shaped tubes. The heated water side has a large water flow section, low head loss, and is convenient for descaling and maintenance.

Transformation form of tube and core exchange for volumetric heat exchangers:

The exchange of tubes in a volumetric heat exchanger is equivalent to only replacing tubes, while the exchange of cores in a volumetric heat exchanger is equivalent to replacing all tube plates, partitions, and tubes. The material of the tube plate and partition is carbon steel. If there are special requirements, stainless steel material can be selected. (As shown in the figure)

Working principle of tube exchange in volumetric heat exchangers:

1. Automatic temperature control energy-saving volumetric heat exchanger, which fully utilizes steam energy, is a type of water heater with high and energy-saving performance. Ordinary heat exchangers generally require a water to water heat exchanger to reduce the temperature of steam condensate for reuse. The condensate water temperature of energy-saving heat exchangers is around 75 ℃ and can be directly returned to the boiler room for reuse. This reduces equipment investment, saves the area of the heat exchanger room, and thus reduces the construction cost. Therefore, energy-saving volumetric heat exchangers are popular among design users.

2. Detailed diagram of the working principle of energy-saving volumetric heat exchanger. There are two types: vertical and horizontal.

3. This heat exchanger is suitable for hot water supply systems in general industrial and civil buildings. The heating medium is steam, the working pressure of the heating pipe is less than 0.6MPa, the working pressure of the shell is 0-1.6MPa, and the outlet hot water temperature is 65 ℃.

4. Energy saving volumetric heat exchangers have three types of shell materials: carbon steel Q235-A and B, stainless steel IGr18Ni9Ti, carbon steel lined with copper, U-shaped tube materials, purple copper tube T2, and stainless steel tube ICr18Ni9Ti, which can be selected as needed.

5. The horizontal energy-saving type is a steel saddle support. Same as international S154 and S165. Vertical support for column base.

6. Heat exchanger - safety devices must be installed, and one of the following three safety devices can be installed on the exchanger:

(1) When installing a safety valve in the heat exchanger, the pressure of the safety valve must be compatible with the high working pressure of the heat exchanger (it must be declared when ordering from the safety valve manufacturer). The installation and use of safety valves should comply with the regulations of the Supervision Regulations on Safety Technology of Pressure Vessels issued by the Ministry of Labor and Human Resources.

(2) Install an outlet pipe in the exchanger to connect to the atmosphere (when conditions permit).

(3) Install an expansion water tank connected to a water heater to discharge the expansion water.

7. If water contains hardness and salts, when using a heat exchanger, scale will form on the walls of the device and the pipes, leading to a decrease in heat transfer rate and an increase in energy consumption, which affects its use. Therefore, certain softening measures should be taken.

The parameters required for tube exchange in a volumetric heat exchanger are:

1. Drawing of the original equipment of the volumetric heat exchanger.

2. Is it to replace the core (partition, tube plate, tube bundle) or just replace the tubes.

3. U-shaped pipe material: stainless steel pipe, copper pipe, 20G pipe (boiler pipe), carbon steel pipe, etc

4. Specific size of U-shaped pipe: diameter? Wall thickness? Manager?

5. If there is a specific piping diagram, please provide it!

6. The location of the tube exchange for the volumetric heat exchanger must be informed, and the head (small chamber) must be moved to our company for exchange. Convenient for water pressure testing, etc. To prevent on-site installation from not being able to enter or experiencing any issues.

Specification table for U-shaped tubes of volumetric heat exchangers:

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