How much is a set of second-hand tube condenser sold in Chongqing, large high-pressure heat transfer equipment
When processing and manufacturing the shell of the tubular condenser, the longitudinal and circumferential welds shall be GTAW backing, SMAW intermediate layer welding and SAW cover plate surface welding. Only in this way can welding deformation be reduced and work efficiency be improved. In addition, it is required that the number of wrong sides should not be greater than 0.5mm. In the actual manufacturing process, in order to reduce the deformation of the shell of the tubular condenser in the welding process of the large opening nozzle, it is recommended to use asymmetric K-groove welding joints. Before welding, install a round support tool inside the cylinder, and use TIG method during welding. When the shell of the stainless steel condenser meets the requirements, the tube sheet and baffle need to be processed. The tube hole of the tube plate can be drilled with a CNC drilling machine.
The assembly of tubular condenser is also a key link in the manufacturing process of tubular condenser. Due to the large number and weight of heat exchange tubes, it is difficult to put tube bundles into tubes after all tubes are inserted, and the heat exchange tubes are easily damaged. In the actual construction process, first insert the fixed side tube sheet, pull rod, spacer tube and baffle, and then insert some quincunx shaped heat exchange tubes.
The concentricity of baffle plate and tube plate of stainless steel condenser shall be adjusted to ensure sufficient rigidity of the whole tube bundle. Then install the tube bundle into the shell and wear the remaining heat exchange tubes.
In addition, it will also involve the welding of various components in the tubular condenser, including the welding of tubes and tubesheet, tubesheet and shell, etc. All these are carried out in a reasonable manner and air tightness tests are carried out to prevent leakage.
The stainless steel condenser shall be chemically cleaned and descaled with cleaning solution, acid solution, alkaline solution, clean with clean water and acid alkali solution.
The cleaning solution can be added to the cooling water system in a certain proportion, and the cooling pump can be started to circulate for 12 to 24 hours. The cleaning solution will continue to circulate. Through the chemical action and scouring action of the cleaning solution, the deposit layer will continue to dissolve and drip.
To clean a single condenser, a circulating pump and pipeline can be connected between the detergent storage tank and the condenser to form a closed loop, so that the detergent can be continuously circulated for 12 to 24 hours to dissolve and remove sediment. Use immersion type to mix the cleaning solution in a certain proportion, add it to the condenser, and let it stand for 5 - 10 hours to soften and dissolve the sediment, discharge the cleaning solution, and clean it with clean water.
Advantages of chemical cleaning: descaling; Labor saving.
Disadvantages of chemical cleaning: it may lead to corrosion of condenser copper tubes; Discharge of waste liquid after cleaning; Drugs are more expensive. During chemical cleaning, pay attention to the proportion, circulation and immersion time of the solution to prevent the condenser from being corroded.
The refrigeration principle of the general refrigerator is that the compressor compresses the working medium from low temperature and low pressure gas to high temperature and high pressure gas, and then condenses it into medium temperature and high pressure liquid through the condenser. After throttling by the throttle valve, it becomes low temperature and low pressure liquid. The low temperature and low pressure liquid working medium is sent to the evaporator, where it absorbs heat and evaporates to become the low temperature and low pressure steam, which is sent to the compressor again to complete the refrigeration cycle.
Therefore, if you want the load to do work again, you should first release the heat energy that is not completely released, and then you need to use the condenser. If the surrounding heat energy is higher than the temperature in the condenser, in order to lower the temperature of the condenser, work is done manually (usually using the compressor). The condensed fluid returns to the state of high order and low heat energy, and can do work again.
