Uloga glavnih komponenti hladnjaka sušilice
1. Hlađenje kompresor
Hladnjački kompresori su srce rashladnog sustava, a većina kompresora danas koristi hermetičke kompresore. Raising the refrigerant from low to high pressure and circulating the refrigerant continuously, the system continuously discharges internal heat to an environment above the system temperature.
2. Kondenzator
The function of the condenser is to cool the high-pressure, superheated refrigerant vapor discharged by the refrigerant compressor into a liquid refrigerant, and its heat is taken away by the cooling water. To omogućava da se proces hlađenja nastavi kontinuirano.
3. isparivač
4. termostatski ventil za ekspanziju (kapilarni)
Termostatski ekspanzijski ventil (kapilarni) je mehanizam za gasnjenje rashladnog sustava. U rashladnoj sušilici, opskrba rashladnim sredstvima isparivača i njegovog regulatora ostvaruje se kroz mehanizam za gas. Mehanizam za gas omogućuje hlađenje da uđe u isparivač iz tekućine visoke temperature i visokog tlaka.
5. izmjenjivač topline
The vast majority of refrigeration dryers have a heat exchanger, which is a heat exchanger that exchanges heat between air and air, generally a tubular heat exchanger (also known as a shell and tube heat exchanger). The main function of the heat exchanger in the refrigeration dryer is to “recover” the cooling capacity carried by the compressed air after being cooled by the evaporator, and use this part of the cooling capacity to cool the compressed air at a higher temperature carrying a large amount of water vapor (that is, the saturated compressed air discharged from the air compressor, cooled by the rear cooler of the air compressor, and then separated by air and water is generally above 40 ° C), smanjujući na taj način opterećenje grijanja sustava hlađenja i sušenja i postižući svrhu uštede energije. On the other hand, the temperature of low-temperature compressed air in the heat exchanger is recovered, so that the outer wall of the pipeline transporting compressed air does not cause “condensation” phenomenon due to the temperature below the ambient temperature. In addition, after the temperature of the compressed air rises, the relative humidity of the compressed air after drying is reduced (generally less than 20%), which is beneficial to prevent the rust of the metal. Some users (eg with air separation plants) need compressed air with low moisture content and low temperature, so the refrigeration dryer is no longer equipped with a heat exchanger. Budući da izmjenjivač topline nije instaliran, hladni zrak se ne može reciklirati, a toplinsko opterećenje isparivača puno će se povećati. In this case, not only does the power of the refrigeration compressor need to be increased to compensate for energy, but also the other components of the entire refrigeration system (evaporator, condenser and throttling components) need to be increased accordingly. From the perspective of energy recovery, we always hope that the higher the exhaust temperature of the refrigeration dryer, the better (high exhaust temperature, indicating more energy recovery), and it is best that there is no temperature difference between the inlet and outlet. But in fact, it is not possible to achieve this, when the air inlet temperature is below 45 °C, it is not uncommon for the inlet and outlet temperatures of the refrigeration dryer to differ by more than 15 °C.
Obrada komprimiranog zraka
Održavanje i pregled: Održavajte temperaturu rosišta sušilice za hlađenje iznad nule.
Da bi se smanjila temperatura komprimiranog zraka, temperatura isparavanja rashladnog sredstva također mora biti vrlo niska. When the refrigeration dryer cools the compressed air, there is a layer of film-like condensate on the surface of the fin of the evaporator liner, if the surface temperature of the fin is below zero due to the decrease in the evaporation temperature, the surface condensate may freeze, at this time:
A. Due to the attachment of a layer of ice with a much smaller thermal conductivity on the surface of the inner bladder fin of the evaporator, the heat exchange efficiency is greatly reduced, the compressed air can not be fully cooled, and because of the insufficient heat absorption, the refrigerant evaporation temperature may be further reduced, and the result of such a cycle will inevitably bring many adverse consequences to the refrigeration system (such as “liquid kompresija ”);
Ispitati
1. Razlika tlaka između ulaznog i izlaza komprimiranog zraka ne prelazi 0,035MPA;
2. mjerač tlaka isparavanja 0,4MPA-0,5MPa;
3. mjerač visokog tlaka 1,2MPA-1,6MPa
4. Često promatrajte sustave za odvodnju i kanalizaciju
Izdanje operacije
1 Provjerite prije pokretanja
1.1 Svi ventili sustava mreže cijevi su u normalnom stanju pripravnosti;
1.2 Otvara se ventil za hlađenje vode, tlak vode treba biti između 0,15-0,4MPa, a temperatura vode ispod 31 ċ;
1.3 Mjerač visokog tlaka rashladnog sredstva i mjerač niskog tlaka rashladnog sredstva na nadzornoj ploči imaju naznake i u osnovi su jednaki;
1.4 Provjerite napon napajanja, koji ne prelazi 10% nazivne vrijednosti.
2 Postupak pokretanja
2.1 Pritisnite gumb za pokretanje, AC kontaktor se odgođuje 3 minute, a zatim je započeo, a kompresor rashladnog sredstva počinje trčati;
2.2 Observe the dashboard, the refrigerant high-pressure meter should slowly rise to about 1.4Mpa, and the refrigerant low-pressure meter should slowly drop to about 0.4Mpa; U ovom trenutku, stroj je ušao u normalno radno stanje.
2.5 Provjerite je li odvodnjavanje automatskog odvoda normalna;
2.6 Redovito provjeravajte radne uvjete sušilice, zabilježite ulaz zraka i tlak izlaza, visok i niski tlak hladnog ugljena itd.
3 Postupak isključivanja;
3.1 Zatvorite izlazni zračni ventil;
3.3 Pritisnite gumb za zaustavljanje.
4 mjere opreza
4.1 Izbjegavajte dugo trčati bez opterećenja.
4.2 Ne započinjete kompresor rashladnog sredstva kontinuirano, a broj startova i zaustavljanja na sat ne smije biti veći od 6 puta.
4.3 Da biste osigurali kvalitetu opskrbe plinom, budite sigurni da se pridržavajte redoslijeda pokretanja i zaustavljanja.
4.3.1 Start: Ostavite da sušilica radi 3-5 minuta prije otvaranja kompresora zraka ili ulaznog ventila.
4.3.2 Isključivanje: Prvo isključite kompresor zraka ili izlazni ventil, a zatim isključite sušilicu.
4.5 Tlak zraka ne smije prelaziti 0,95MPA.
4.7 Temperatura hladne vode ne prelazi 31 stupanj.
4.8 Nemojte se uključiti kada je temperatura okoline niža od 2ċ.
4.9 Postavka vremenskog releja u električnom upravljačkom ormaru ne smije biti manja od 3 minute.
4.10 Opća operacija sve dok kontrolirate gumbe "Start" i "Stop"
4.11 The air-cooled refrigeration dryer cooling fan is controlled by the pressure switch, and it is normal for the fan not to turn when the refrigeration dryer works at a low ambient temperature. Kako se visoki tlak rashladnog sredstva povećava, ventilator se automatski započinje.
Post Vrijeme: kolovoz-26-2023