Cleaning of heat transfer tubes in lithium bromide refrigeration chiller
During the operation of lithium bromide refrigeration units, scale, rust, microorganisms, algae and other dirt will gradually form inside the heat transfer tubes, which will seriously affect the heat exchange efficiency of the heat transfer system. If not cleaned in a timely manner, it will lead to a decrease in the refrigeration efficiency of the unit, thereby affecting the overall performance of the equipment. There are two methods for cleaning heat transfer tubes: physical cleaning and chemical cleaning.
1, Physical cleaning
Physical cleaning mainly removes scale and dirt on the inner wall of heat transfer tubes through mechanical means. The specific steps are as follows:
1. Preparation work: Firstly, it is necessary to open the drainage outlet of the water chamber in the cleaning area, drain the water in the water chamber completely, and then open the end cover plate of the water chamber to prepare for the cleaning work.
2. Mechanical descaling: Choose suitable cleaning tools, such as using a cylinder cleaning machine in conjunction with a cylinder cleaning brush. When selecting the size of the cylinder cleaning brush, it should be equivalent to the diameter of the heat transfer tube to ensure the cleaning effect. During cleaning, use a cylinder rod equipped with a cylinder brush to pass from one end of the heat transfer tube to the other, and remove soft scale inside the heat transfer tube through the friction of the brush. This process can be repeated 2-3 times to ensure thorough removal of scale.
3. High pressure flushing: After the heat transfer tube is passed through the cylinder, use a 0.6MPa-0.8MPa high-pressure water gun to flush the heat transfer tube to further remove residual scale and dirt.
4. Resumption of work: Finally, install the water cover plate and test the water chamber for leakage.
2, Chemical cleaning
Chemical cleaning is achieved by reacting chemical agents with dirt to dissolve or peel it off. The specific steps are as follows:
1. System inspection: Before cleaning, a comprehensive inspection of the heat transfer tubes in the water chamber of the unit is required, including checking for scaling, whether there are blockages at the tube openings and inside.
2. Establish a cleaning system: Establish a cleaning circulation system outside the unit and replenish water to ensure that the cleaning circulation system can circulate normally. At the same time, add Blue Star 826 to pre protect the surface of the heat transfer tube.
3. Circulating cleaning: Start the cleaning pump for closed circulation, add cleaning agents to circulate in the heat transfer tube, and react with dirt. At the same time, it is necessary to monitor the pH value of the cleaning agent and the reaction of the agent in real time, and decide whether to supplement the cleaning agent according to the situation to ensure the cleaning effect and unit safety.
4. Check the cleaning effect: After circulating for a period of time (usually about 4-6 hours), open the condenser end cover to check the descaling effect. If the descaling effect is not good, continue to replenish water and add cleaning agents for cleaning.
5. Rinse and acceptance: After confirming that the descaling effect is good, neutralize the cleaning agent and discharge it. Use a high-pressure water gun to rinse the heat transfer tube to ensure that there is no residual agent in the heat transfer tube. After flushing, users are required to conduct preliminary acceptance to confirm the descaling effect.
6. Restore the system: After passing the acceptance inspection, install the water cover plate and test the water chamber for water leakage.
3, Precautions
During the cleaning process, the dosage and concentration of cleaning agents should be strictly controlled to avoid damage to the heat transfer tubes of the unit.
After the cleaning is completed, a comprehensive inspection and debugging of the unit should be carried out to ensure that it returns to normal operation.
3. Physical cleaning and chemical cleaning can be combined according to actual situations to achieve better cleaning results.
4. When selecting cleaning agents, it is necessary to choose the appropriate cleaning agent based on the material of the heat transfer tube. Generally, for copper tubes, we can use calcium or sulfamic acid as cleaning agents, but for stainless steel tubes, sulfamic acid can only be used as a cleaning agent for chemical cleaning.
In summary, the cleaning methods for the heat transfer tubes of lithium bromide refrigerators include physical cleaning and chemical cleaning. In practical operation, appropriate cleaning methods should be selected based on the scaling situation and cleaning requirements of the unit's heat transfer tubes.
Lithium bromide solution manufacturer
About us
Flier Refrigeration Engineering Technology Co., Ltd is a professional technical service enterprise integrating central air-conditioning host sales, spare parts sales, unit repair and maintenance.
Factory located in Zhenjiang, Jiangsu, covering an area of 25,000 square meters ,and has been built with 1 R&D center, 1 pilot plant, 3 An innovative production, learning, and research base composed of a professional production workshop and its corresponding infrastructure. At present, the company has become a well-known technical service provider in the field of central air conditioning in China.
The company's main business scope includes: central air-conditioning maintenance, cleaning and technical services; cooling tower and fan coil cleaning and maintenance services; custom processing of lithium bromide solution; sales of lithium bromide solution special impurity separators; central air-conditioning host and various zero Sales of accessories; installation and sales of central air conditioning systems, etc.
Contact us
Ms. Lillian GUO
Zhenjiang FLIER Refrigeration Engineering Technology Co., Ltd
Jiangsu, China
Tel: + 86 15358588768(Whatsapp)
Wechat：15358588768
E-mail: mdguolijuan@zjflier.com
