Dryer maintenance items:
1. Check the moisture indicator every half month: blue means dry, red means wet, and the filter element needs to be replaced when it reaches the red area.
2. Check the pressure difference between the pre-filter and the post-filter every half month: the pressure difference before and after is ≤ 0.5 kg/cm ㎡. If this pressure difference is exceeded, replace the filter element.
3. Check and control the filter element of the gas path filter every month: there is no blockage. If there is blockage, replace the filter element.
4. Check the front and rear filter elements every three months: check the blockage and clean up the dirt.
5. Purge the safety valve with compressed air every three months: close the inlet/outlet valve, completely release the pressure of the dryer, and then purge the safety valve.
6. Check the desiccant every year: close the inlet/outlet valve, completely reduce the pressure of the dryer, open the desiccant filling port, and check whether the desiccant is polluted or crushed by oil.
7. Check the outlet check valve every year: close the inlet/outlet valve and completely release the pressure of the dryer.
Wearable parts of dryer: traditionally, adsorbents, controllers, valves and silencers are collectively called the four vulnerable parts of dryer.
1. Wearable parts-adsorbent: As the industrial main body of dryers, adsorbents are frequently impacted by pressure, steam and heat most of the time, and are prone to mechanical breakage and media pollution, which deteriorates the performance of adsorbents. Since activated alumina replaced silica gel as the main adsorbent, various properties have been greatly improved, especially the compressive strength and liquid water immersion resistance have reached a high level. As long as there are no operational factors such as "insufficient energy consumption for regeneration", the dew point of compressed air can reach -40℃ after treatment with activated alumina, and the service life can reach more than 2-3 years.
2. Wearable parts-controller: The controller is the command center of the adsorption dryer. With the development of subsidiary electronic technology and the wide application of PLC technology, the control accuracy and reliability are better than the early electromechanical control. Except the heating regeneration element has been further improved in anti-interference and anti-overload, other control elements are no longer vulnerable parts.
3. Wearable parts-control valve: The control valve is an easily damaged part in the adsorption dryer. Frequent switching and long-term mixed invasion of moisture and adsorbent shedding are the important reasons for valve damage and exposure.
4. Wearable parts-muffler: The muffler is a component prone to failure, which is mainly manifested in the blockage of the exhaust passage of the muffler. Once the muffler fails (blocked), the damage to the whole machine is fatal, which will lead to the decline of the regeneration performance of the adsorbent and premature aging. Therefore, muffler is the focus of daily maintenance of adsorption dryer!
Precautions for dryer:
1, the adsorption dryer has been filled with adsorbent before leaving the factory, and it will be delivered only after the commissioning and operation are qualified. Desiccant should be replaced after 12000 hours. When replacing, the same type of desiccant should be selected. The filling quantity can be adjusted according to the flow rate of the dryer, and the filling should be full and substantial.
2. The internal diverter (diffuser) of the adsorption dryer should be replaced after 12000 hours, otherwise the pressure difference will be generated.
3. After the first use of 6000-8000 hours, replace the filter element of the main pipeline filter.
4. One-way valve is the main part of adsorption dryer, so it is better to replace the adsorbent synchronously.
5. Muffler is a component prone to failure, mainly manifested in the blockage of muffler exhaust passage. Once the muffler fails (blocked), the damage to the whole machine is fatal, which will lead to the decline of the regeneration performance of the adsorbent and premature aging. Therefore, muffler is the focus of daily maintenance of adsorption dryer!