Coal-fired boiler induced draft fan GY4-73 fanatik endistriyèl echapman wear-resistant and high-temperature resistant
The coal-fired boiler induced draft fan is a core auxiliary equipment in the coal-fired boiler system. Its function is to extract the flue gas produced by the boiler combustion through negative pressure suction, and maintain a suitable negative pressure environment in the furnace to ensure complete fuel combustion and stable boiler operation.
I. Core Working Principle
The induced draft fan creates a negative pressure zone at the fan inlet by the centrifugal force or axial thrust generated by the rotating impeller, drawing the high-temperature flue gas from the furnace through the flue into the fan, and then discharging it through the outlet flue to the chimney (or environmental protection equipment such as desulfurization and denitrification devices).
The furnace negative pressure must be strictly controlled (generally -20 to -50 Pa). Excessive negative pressure can draw in cold air, reducing the boiler’s thermal efficiency, while insufficient negative pressure may cause flame blowout, posing safety hazards.
Types of boiler centrifugal induced draft fans:
1) se fanatik la bouyon pwovoke ki fèt tankou yon kalite aspirasyon sèl. Gwosè varye ant No. 8 a No 29.5.
2) Ka chak kalite fanatik dwe manifaktire nan swa wotasyon bò gòch oswa fòm wotasyon dwat.
3) The outlet position of the fan is indicated by the angle of the casing’s exit.
4) Metòd yo kondwi gen ladan yo: B, C Kalite pou Belt Drive; D Kalite pou kondwi kouti; E, F Kalite pou Belt Drive.
5) Yon egzanp sou non an pwodwi plen se jan sa a:
G4-73no.20dright45 degre
Y4-73no.20dleft90 degre
Ki kote G ak Y reprezante fanatik ekipman pou chofaj ak chofaj fanatik bouyon pwovoke respektivman.
Structural features of boiler induced draft fans: Coal-fired boiler induced draft fan
Fanatik santrifujeur:
Aman: te fè nan plak asye, solid ak serye, ki disponib nan entegral oswa semi-louvri kalite, ak semi-louvri kalite yo te pi bon pou antretyen. Fanatik ki anba a No 14 yo se sitou entegral, pandan y ap moun ki pi wo a No 14 yo se sitou semi-louvri.
Impeller:
Seksyon kondwi: ki konpoze de arbr prensipal, pote lojman, woule BEARINGS, ak pouli (oswa kouti).
Inlet: soude nan yon fòm konik, ki fòme yon estrikti senplifye convergent, ki sitiye sou bò a nan fanatik la, ak yon koube koup transvèsal sou direksyon an aksyal, sa ki pèmèt lis antre nan gaz nan tubing a ak pèt minim.
Pòt Acct: Enstale nan devan nan Inlet la, yo itilize yo ajiste volim nan vantilasyon lè vitès la fanatik (presyon) rete konstan.
Boiler induced draft fan fault repair Coal-fired boiler induced draft fan
Centrifugal fan drive part wear is a common equipment issue, including blower bearing position, bearing housing wear, and fan shaft bearing position wear. For the above faults of centrifugal fans, traditional repair methods include buildup welding, thermal spraying, and electroplating, but each has certain drawbacks: the high temperature generated by welding produces thermal stress that cannot be completely eliminated, easily causing material damage, leading to component bending or breaking; while electroplating is limited by coating thickness,
Installation matters for boiler induced draft fan Coal-fired boiler induced draft fan
1. Tout inite fanatik santrifujeur la ta dwe dirèkteman mete sou fondasyon an ak pote lè l sèvi avèk shims pè enkline.
2. Pou sit-reyini fanatik santrifujeur, sifas yo machined sou baz la ta dwe byen pwoteje epi yo pa ta dwe gen rouye oswa domaj. Lè w ap mete baz la sou fondasyon an, li ta dwe pote lè l sèvi avèk shims pè enkline.
3. Lojman an pote yo ta dwe byen sere baz la, ak devyasyon nivo Longitudinal pa depase 0.2/1000, mezire ak yon nivo sou arbr prensipal la, ak devyasyon nivo Transverse pa depase 0.3/1000, mezire ak yon nivo sou orizontal mitan-plan an nan lojman an pote.
4. Anvan grate kokiy yo pote, yo ta dwe liy lan aks nan rotor la aliyen ak liy lan aks aman, ansanm ajiste diferans ki genyen ant tubing a ak Inlet la ak diferans ki genyen ant arbr prensipal la ak twou a bò dèyè pote twou a nan bwat la satisfè espesifikasyon yo nan dokiman yo ekipman teknik.
5. Pandan asanble nan arbr prensipal la ak kokiy pote, chèk yo ta dwe te pote soti dapre espesifikasyon yo nan ekipman dokiman yo teknik. Clearance ki genyen ant kouvèti a pote ak koki a pote yo ta dwe konsève nan 0.03 0.04 milimèt (mezire pa dyamèt la deyò nan koki a pote ak dyamèt la enteryè nan lojman an pote).
6. Lè w ap rasanble bwat fanatik la, yo ta dwe pozisyon nan bwat la aliyen ki baze sou liy lan aks rotor, ak aksyal la ak twou vid ki genyen radyal ant Inlet la upeller ak Inlet la bwat yo ta dwe ajiste nan seri a espesifye nan ekipman yo dokiman teknik. An menm tan an, tcheke si boulon yo jete lank yo byen tache. Si dokiman teknik ekipman yo pa presize valè diferans yo, diferans jeneral aksyal la ta dwe 1/100 nan dyamèt la ekstèn tubing, ak diferans lan RADIAL yo ta dwe egzakteman menm jan distribye, ak yon valè de 1.5/1000 a 3/1000 nan dyamèt la eksteryè (pou pi piti dyamèt ekstèn, pran valè a pi gwo). Pandan ajisteman, fè efò pou minimize valè diferans yo pou amelyore efikasite fanatik la. Lè aliyen fanatik la, aliyman ki genyen ant arbr a fanatik ak arbr a motè pa ta dwe depase 0.05 milimèt radyalman epi yo pa ta dwe depase 0.2/1000 nan enklinasyon. Pou fanatik santrifujeur ak woule BEARINGS, aliyman an nan twou yo pote sou de ankadreman yo pote ka detèmine apre yo fin rotor la enstale, ki baze sou si wi ou non wotasyon a se lis.
Zibo Hongcheng Fan Co., Ltd. espesyalize nan pwodiksyon plis pase 50 seri ak plis pase 600 espesifikasyon ak modèl fanatik yo. Pwodwi sa yo lajman itilize nan endistri tankou min, min chabon, jaden lwil, plant chimik, four, metaliji, chodyèr, tekstil, ak materyèl bilding. Pwodiksyon koutim ak pwosesis dapre bay desen ki disponib. Byenveni nan kontakte nou pou koperasyon.
