الصفحة الرئيسية > الأخبار > تحليل أسباب حرائق أكياس الترشيح والوقاية منها

تحليل أسباب حرائق أكياس الترشيح والوقاية منها

As the core component of industrial dust removal systems, filter bags are widely used in industries such as cement, metallurgy, and power. However, frequent incidents of كيس الفلتر fires not only cause significant economic losses, but also pose a threat to personnel safety and production continuity. This article will systematically analyze the causes of fires and propose targeted prevention and control strategies.

ما هو كيس الفلتر؟

A filter bag is a gas-solid separation device made of multiple layers of fiber materials, which achieves gas purification by intercepting suspended particles. Its performance directly affects the dust removal efficiency and system safety, and special attention should be paid to key indicators such as temperature tolerance and anti-static properties.

Deep analysis of the causes of fire

High temperature triggers

1. Smoke overheating operation

Typical operating conditions: metallurgical kilns (>300 ℃), cement rotary kilns (250-350 ℃)
Material limit:

○ Polyester filter material: can withstand 130-150 ℃ continuously

○ Nomex filter material: up to 204 ℃

○ Fiberglass filter material: 260 ℃ (treated with silicone oil)

Failure mechanism: High temperature causes fiber molecular chains to break, and after a 80% decrease in strength, they are easily ignited by sparks

2. Local overheating phenomenon

Common triggers:

○ Uneven airflow distribution (measured wind speed difference>30%)

○ Dust cleaning system malfunction (pulse valve failure rate reaches 15%)

○ Poor heat exchange (temperature difference exceeding the design value by 50 ℃)

Combustible Material Accumulation

1.Dust Spontaneous Combustion Characteristics

Dust Type	Ignition Point (°C)	Minimum Ignition Energy (mJ)
Coal Dust	160-180	30
Aluminum Powder	550	15
Sulfur	190	1.5

2. Consequences of Cleaning System Failure

Oxidation Heat Release Rate Increases by 300% when dust layer thickness exceeds 3mm.
دراسة حالة: At a cement plant, 5mm of dust accumulation on filter bags due to solenoid valve failure triggered spontaneous combustion.

Electrostatic discharge hazards

1. Electricity generation mechanism

The dust conveying process can generate a static voltage of 10-30kV
Chemical fiber filter bags are prone to accumulating charges when the surface resistance is greater than 10 ¹³ Ω

2. Discharge ignition conditions

Energy>0.25mJ can ignite most industrial dust

Key prevention measures: Low MIE substances such as carbon black and magnesium powder

Equipment failure risk

1. Mechanical wear and tear

The damage rate in the pulse blowing area accounts for 60% of the total
Deviation of the Venturi tube by 5 ° leads to intensified airflow erosion

2. Electrical hazards

Loose motor wiring can generate 2000 ℃ arc
When the dust accumulation in the control cabinet reaches 0.5mm, the insulation performance decreases by 50%

Systematic prevention and control plan

Temperature monitoring system

1.Three level warning mechanism:

Level 1 warning (10% over temperature): Sound and light alarm

Level 2 warning (20% over temperature): Interlocking cooling

Level 3 warning (30% over temperature): emergency shutdown

Waste heat recovery technology:

Install GGH heat exchanger, with a cooling range of up to 150 ℃

Optimization strategy for dust cleaning

Adopting the “pressure time” dual control mode
Manually check the membrane after every 2000 pulses

Static elimination measures

Implant stainless steel conductive fibers (content ≥ 5%)
Set up ion wind static eliminator

Equipment Management Standards

Daily inspection: Check the action status of the pulse valve
Monthly inspection: Grounding resistance<4 Ω
Annual overhaul: replace aging electrical components

الخاتمة

من خلال تنفيذ هذه التدابير الشاملة، يمكن للصناعات أن تقلل بشكل كبير من مخاطر حرائق أكياس المرشحات، مما يضمن عمليات آمنة ومستقرة. وينبغي أن تستمر الأبحاث المستقبلية في استكشاف تقنيات وأساليب جديدة لتعزيز مقاومة أكياس الترشيح للحرائق وتحسين سلامة مناولة الغبار الصناعي.

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