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燭式過濾器過濾原理 Filtering Principle

燭式過濾器也稱為濾餅層過濾器，由立式容器和垂直安裝的過濾單元組成。其過濾單元是以開孔的花瓣式的濾芯和濾布組成。實(shí)際的過濾介質(zhì)是包裹在濾芯表面的濾布和濾餅層，濾布用專用的卡箍緊固在濾芯的表面使其密封。它的過濾過程是完全密閉的，無泄漏，沒有任何的環(huán)境污染?？梢詫?shí)現(xiàn)一次性全過程自動(dòng)化過濾，濾餅洗滌、風(fēng)干，同時(shí)采用氣體反吹排渣等工藝。整套過程速度快，無污染，可獲得最大工作效率。

Candle filter is also called filter cake layer filter, it is composed of the vertical vessel and vertically installed filter units. The filter units consist of poriferous petaloid filter cartridge and filter cloth. The real filter medium are the filter cloth and filter cake layers that covering the filter cartridge. Filter cloth is fixed on the surface of filter cartridge to make it fully sealed by using special clamps. The entire filter process is totally sealed without any spillage or environment pollution. It can realize automatic filtration, feeding washing & air drying, and air back blowing to discharge residuals at one time. The filter process is in high speed and zero pollution, it brings largest economic benefit.

主要結(jié)構(gòu)及工作原理 Main Structure & Working Principle

燭式過濾器是一個(gè)全密閉的過濾系統(tǒng)，主要部件有物料罐、儲(chǔ)氣罐、過濾泵、燭式過濾器、管道、閥門、PLC電器控制等組成。

過游時(shí)用泵將需過濾納樣送入過濾器內(nèi)，當(dāng)液體經(jīng)過濾布時(shí)，會(huì)在濾布表面逐步集聚液體中的固體物質(zhì)，當(dāng)這些固體物質(zhì)達(dá)到一定算度時(shí)，就形成了讀講。由于消瘦增加之間的空意很小，阻留了滾體中顛粒雜質(zhì)的遺遺遺，這樣就使濾液變清，在滿餅溫未形成前，排出的“清液”再回到原物料罐作循環(huán)過濾，直至溶餅層形成（能達(dá)到過濾要求），過濾器提供一信號(hào)給PLC控制清液不再循環(huán)，清液鋰過過濾閥送至下道工序使用，進(jìn)行正常過濾。

正常過濾一段時(shí)間后，當(dāng)多孔燭芯上滿餅層達(dá)到-定厚度時(shí)，滿液通過濾餅的速率降低，過濾波率變差，過濾得壓力升高（0.5MPc以上）這時(shí)壓差開關(guān)（或者壓力傳感器）提供-信號(hào)給PLC停止過濾泵泵泵、關(guān)閉進(jìn)料閥，打開正吹閥，然后捧凈過濾器內(nèi)的總液，當(dāng)過濾器內(nèi)液體低于滿芯時(shí)打開排液調(diào)隨液通過排液閥撐，這時(shí)過清器內(nèi)壓力迅速下降PLC接收到低壓信號(hào)，關(guān)閉正歡閥，打開反攻倒（壓縮空氣、復(fù)氣或飽和蒸汽）進(jìn)行反取，使?jié)M餅脫落，反吹一定時(shí)間后（30秒），停止反吹，打開過湍器排渣口進(jìn)行排渣，排灌結(jié)束后關(guān)閉排渣口，完成一個(gè)過湍周期，回到過游前初始狀態(tài)，準(zhǔn)備進(jìn)行下一輪過渴

Candle filter is a fully closed filter system. Its main parts are the material tank, air storage tank, feeding pump, candle filter, pipes, valves, PLC electric control system.

While filtering, filter material will be sent into the filtering housing by feed pump first; when it passes through filter cloth, solid particles will be stopped on the filter cloth. And as the solid particles growing, they will become filter cakes. The holes hpetween solid particles are very small, so they can kkeep more solid particles, thus get clear liquid. Before solid particles becoming cakes, the filtration will be sent back to filter material tank and resend to vessel again. When filter cakes are formed (and reaches required requirement), PLC will send a signalto stop the circulation, and the clear liquid will pass the filter valve and go to next process to start the normal filtering process.

After certain time normal filtering, the cake thickness is increasing to high level, the filtering speed is slow down, filtering efficiency is decreased, and the filter pressure is >0.5MPa, then the pressure sensor will send a signal to PLC to stop feed pump, close feed valve and open forward blowing valvee to remove the filtrate in vessel. When the liquid level in vessel is lower than filter cartridge, PLC will open drain valve to discharge filtrate, the pressuure will drop swiftly. When PLC received low pressure signal, it will close forward blowing valve and pen back blowing valve (compressed air, nitrogen or steam) to back blow until cakes fall down. Stop bloowing after 30 seconds, and open cake dischargingoutlet to discharge cakes. When cakes are discharged, close the cake discharging outlet to finish the filtering cycle. The candle filter will be ready for next cycle.