1. Product Features

DFN-TG 76 jacketed tube heat exchanger, suitable for heating or cooling stainless steel non-corrosive liquids, heat exchangers combined with multiple sets of straight tubes can be heated, insulated, Heat recovery and cooling. The complete set of equipment can also automatically control and record the heating sterilization or cooling temperature of materials, and automatically reprocess unqualified materials. The equipment has high heat exchange efficiency, compact structure, reliable work, stable performance, long running time, Easy to operate, clean and maintain.

2. Main purpose and scope of application

Because the inner wall of DFN-TG 76 jacketed tube heat exchange tube is polished, the material resistance is small, and the phenomenon of coking of the tube wall under high temperature conditions is greatly improved. Therefore, it can be widely used in applications where plate heat exchangers cannot be used. , it can not only process fresh milk, soy milk, tea drinks, fruit juice drinks, etc., but also suitable for other liquid foods with high viscosity or slight particles and fibers, sauces, and chicken juice production lines.

1. Working principle and design standard

1. Working principle TG76 jacketed tube heat exchanger is a concentric tube made of straight tubes with different diameters and connected by U-shaped elbows. In this heat exchanger, one kind of fluid goes in the tube and the other kind of fluid goes through the annular gap, both of which can get a higher flow rate, so the heat transfer coefficient is larger. In addition, in the casing heat exchanger, the two fluids can be pure countercurrent, and the logarithmic average driving force is large. The casing heat exchanger has a simple structure, can withstand high pressure, and is convenient to use (the number of pipe sections can be increased or decreased as required). Especially because the casing heat exchanger has the advantages of large heat transfer coefficient, large heat transfer driving force and ability to withstand high pressure, it is used for materials with high product viscosity (stabilizers or sauces, chicken juice, etc.) Almost all are casing type.

DFN-TG 76 jacketed pipe complete set of equipment includes material balance tank, hot water tank, centrifugal pump, steam pipeline, water heater, instrument box and related valves and pipelines in addition to the main body of the heat exchanger. Backflow, its temperature control is automatically controlled and continuously recorded by the instrument box, so as to monitor the production process and check the sterilization quality of the material. The hot water tank, material balance tank, hot water pump and material pump of the equipment are all installed beside the main engine, and the instrument box can be installed separately according to user requirements. The heat transfer surface consists of a set of internal straight-through tubes at both ends. The outside of the pipe and the housing are sealed with O-rings. - This design can be inspected and replaced by unscrewing the end fitting and removing the O-ring seal from the main pipe.

2. Design standards

The heat transfer surface consists of a set of internal straight-through tubes at both ends. The outside of the pipe and the housing are sealed with O-rings. - This design can be inspected and replaced by unscrewing the end fitting and removing the O-ring seal from the main pipe.

Design parameters and configuration choices

The heat transfer surface consists of a set of internal straight-through tubes at both ends. The outside of the pipe and the housing are sealed with O-rings. - This design can be inspected and replaced by unscrewing the end fitting and removing the O-ring seal from the main line.

1. Design parameters

2. Choice of connection method

Installation Notes:

1. The installation of the TG76 jacketed tube heat exchanger is relatively simple, and the equipment placement should be kept horizontal. Under normal circumstances, it is not necessary to use anchor bolts. When installing the pipeline, a valve should be installed at the inlet of the material and medium to control the flow. After the equipment is positioned, it should be checked whether the sealing ring on the pipeline is missing, and whether the joints at the joints of the pipeline are tightened. After the equipment is in place, press the equipment The logo on the connecting material, medium and other pipelines. After checking, clean up the surroundings.

2. According to the working conditions, technical performance and technical requirements of this product, the user can equip a suitable delivery pump to use with this product.

Equipment cleaning and disinfection

The equipment should be thoroughly cleaned before it is officially used. At this time, the equipment should be cyclically cleaned with hot alkaline water to remove the dirt on the inner wall of the pipe, and then the high-temperature hot water should be used instead of the material to circulate in the equipment for 20 to 30 minutes for disinfection. A complete set of equipment with a hot water system, as long as the water is put into the material balance tank, the equipment can be cleaned and disinfected according to the operation sequence.

After each use, the equipment should also be cleaned in the following order to keep the equipment clean.

1. Use clean water to push out the residue in the equipment until the clean water flows out.

2. Use sodium hydroxide solution with a concentration of 1~1.5 at 80~85℃ to circulate and clean in the equipment for 20 minutes, and then use clean water to push out the lye.

3. Use nitric acid solution with a concentration of less than 1% to heat to 80°C~85°C, circulate for 20 minutes, push out with clean water, and then wash with clean water at about 40°C.

4. Use 0.5% sodium hydroxide solution to heat to about 40°C, circulate for 10 minutes, then use clean water to push out the residual liquid, and finally wash with clean water at about 40°C.

If the user unit has a CIP cleaning system, it can be cleaned according to the operating rules of CIP cleaning.

Maintenance and maintenance of equipment

1. During the production process, due to the gradual scaling of the straight pipe, the heat transfer effect will be reduced, the temperature of the heating medium will gradually increase, and the scaling will be more serious. Therefore, it is necessary to regularly check whether the straight pipe is cleaned thoroughly and whether there is product scale. , coking, rust layer and other adhesion.

2. The rubber sealing rings at both ends of the heat exchange straight pipe of the equipment should be replaced immediately after the equipment has been running for a period of time to avoid accidents caused by leakage caused by the aging of the rubber rings.