Vim li cas Ntoo Plua Plav Pellet Ua Tshuab Ua Cov Pellet Cracked?

Mar 27, 2026

Cov kab nrib pleb hauv cov sawdust pellets uas tsim los ntawm cov roj pellet ua tshuab, suav nrog cov kab nrib pleb ntev thiab cov kab nrib pleb, yog qhov tsis zoo ntawm biomass ntau lawm. Lawv ua kom tsis muaj zog ntawm kev ncaj ncees ntawm cov pellets, ua kom cov plua plav zoo tsim tawm thaum lub sijhawm ua haujlwm, thiab txo qis kev ua haujlwm ntawm combustion.

Phau ntawv qhia no txheeb xyuas cov pellet tawg los ntawm lub tshuab engineering foundations, npog cov khoom xws li raw khoom, compression, kub, tuag hnav, thiab txheej txheem stability.

1. Core Phenomenon ntawm Pellet Cracks

Table: Cracking hom & Cov teebmeem

Ntaus hom	Kev piav qhia	Kev tshwm sim
Ntev kab nrib pleb	Split raws pellet ntev	Cov qauv tsis muaj zog
Cov kab nrib pleb	Txoj kev sib tsoo	Fragmentation
Kev tawg hnyav	Pellet tawg mus rau hauv ntu	Cov hmoov nplej siab

👉 Cov pellets tawg feem ntau qhialow density, xoob internal qauv, thiab tsis zoo durability.

2. Moisture Imbalance (Qhov Tseem Ceeb Ntawm Cov Cracks)

Table: Moisture Impact rau Pellet Integrity

Moisture Level	nyhuv
<12%	Tsis zoo lignin bonding, brittle structure
13–15%	Qhov zoo tshaj plaws plasticization & bonding
>18%	Tshaj evaporation → shrinkage tawg

Mechanism

Cracks tsim vimInternal kev nyuaj siab imbalanceThaum lub caij txias:
Tshaj noo noo → shrinkage tom qab txias
Tsawg noo noo → qaug zog sib txuas

Kev daws teeb meem

Khaws noo noo ntawm13–15%
Xyuas kom muaj kev sib xyaw ua ke (tsis txhob qhuav / ntub chaw)
Stabilize raw khoom txias txheej txheem

3. Tuag Compression Ratio Mismatch

Table: Compression Ratio Guidelines

Raw Material Hom	Pom zoo Ratio
Softwood (Poblar)	1:1.9 – 1:2.1
Hardwood (zeeg)	1:2.1 – 1:2.3

Cov tsos mob

Tsawg dhau → xoob, nkig pellets
Siab dhau → kev ntxhov siab ntau dhau → tawg

Kev daws teeb meem

Match tuag tsim rau raw khoom hardness
Tsis txhob dhau - compression lossis qis dua - compression

4. Tsis txaus siab & kub

Table: Cov txheej txheem tseem ceeb

Parameter	Standard Range	Risk yog Abnormal
Tuag kub	80-100 degree	<60°C → weak bonding
Roller qhov sib txawv	0.1-0.3 hli	Loj dhau → tsis tshua muaj siab
Main ceev	200-300 rpm	Instability → kev ntxhov siab tawg

Mechanism

Tsawg kub tiv thaivlignin plasticization, ua rau tsis muaj zog bonding thiab internal puas tsim.

Kev daws teeb meem

Preheat tuag ua ntej pib
Stabilize tshuab ceev
Kho cov menyuam qhov sib txawv precisely

5. Tuag & Roller Wear (Structural Failure Source)

Rooj: Hnav cuam tshuam rau kev tawg

Cheebtsam	Hnav nyhuv
Tuag qhov	Loj → uneven extrusion
Roller nto	Smooth → tsis tshua muaj kev sib txhuam
Qhov system	Tsis sib npaug siab → kev ntxhov siab tawg

Ua rau

Hnav txo:
Kev sib txhuam quab yuam
Compression stability
Tsim kom muaj qhov ntom ntom

Kev daws teeb meem

Hloov cov tuag tuag thiab cov menyuam tsis tu ncua
Ua kom huv qhov tuag qhov geometry
Siv cov khoom hnav- cov khoom siv alloy

6. Raw Material Fiber Structure Teeb meem

Rooj: Fiber Size Impact

Fiber yam	nyhuv
Ntev dhau lawm (1-3 mm zoo tagnrho ntau tshaj)	Tsis muaj zog hauv kev sib raug zoo
Zoo heev	Tsis muaj structural skeleton
Mixed tsis sib npaug	Kev nyuaj siab concentration → tawg

Mechanism

Pellet xav tau ibfiber ntau "skeleton structure"kom muaj kev ncaj ncees.

Kev daws teeb meem

Tswj particle loj rau1-3 hli
Txhim kho kev sib tsoo sib xws
Siv vibrating screening rau uniformity

7. Ceev Crack Troubleshooting Flow (Featured Snippet Section)

👉 Yog tias pellets tawg, kos hauv qhov kev txiav txim no:

Moisture theem (13–15%)
Tuag kub (80-100 degree)
Roller gap (0.1-0.3 hli)
Compression piv
Tuag & menyuam hnav
Raw khoom particle loj (1-3 hli)

8. Kev Tiv Thaiv Kev Tiv Thaiv

Table: Txoj Kev Npaj Tiv Thaiv Kev Txhaum Cai

Ua haujlwm	Ntau zaus
Kev saib xyuas dej noo	Txhua batch
Tuag soj ntsuam	Txhua lub lim tiam
Roller gap calibration	Txhua 500 teev
Hnav ib feem hloov	500-800 teev cycle
Raw khoom kuaj	Tsis tu ncua