Focus on heavy equipment
Focus on heavy equipment
Environmental: Multi-level dust removal and environmental protection standards
I. Product Introduction
Biomass hot air furnace is a heating equipment that uses biomass fuel (such as wood chips, straw, rice husks, palm shells, etc.) as energy, generates high-temperature flue gas through combustion or gasification, and then converts it into clean hot air through a heat exchanger.
II.Working principle
1. Fuel pretreatment stage
Biomass fuel (wood chips, straw, rice husks, etc.) first enters the pretreatment system. After the raw materials are processed by the crusher to a particle size of 30-50mm, they are graded by a vibrating screen to ensure that the particle size of the fuel entering the furnace is ≤8mm. For high-moisture raw materials (moisture content > 25%), they must first be pre-dried
2. Combustion and heating stage
The fuel undergoes a complete combustion process in the furnace: moisture is removed in the drying area (150-300℃), combustible gases are released in the volatilization and analysis area (300-600℃), and the fixed carbon combustion area (800-1000℃) is fully burned. Finally, the residual carbon is burned in the burnout area (600-800℃). Using graded air distribution technology, the primary air (accounting for 60-70% of the total air volume) is sent from the bottom of the grate to maintain the main combustion area, and the secondary air (30-40%) forms a swirl above the combustion area to enhance the burnout effect. All combustion-supporting air is preheated at 120-150℃.
3. Heat exchange stage
The high-temperature flue gas enters the multi-stage heat exchange system. The first-stage heat exchanger uses stainless steel 316L tube bundles to reduce the flue gas from 1000℃ to 400℃; the second-stage heat exchanger uses ND steel material to further reduce the temperature to below 150℃. The clean air is heated to an adjustable temperature of 80-600℃ outside the tube, and the output temperature fluctuation is maintained at ≤±5℃ through the PID control system. The specially designed anti-ashing structure is combined with automatic pulse purge every 4 hours to ensure that the heat exchange efficiency is stable at more than 90%.
4. Environmental protection treatment stage
The combustion exhaust gas first passes through a multi-tube cyclone dust collector to remove more than 80% of large dust particles, and then passes through a high-temperature resistant bag dust collector (filter material withstands 260℃) to make the particle emission ≤30mg/m³. For areas with strict NOx control requirements, an optional SNCR denitrification system can be installed to control nitrogen oxides below 150mg/m³ through urea solution injection. The collected fly ash (containing 12-15% potassium) can be processed into organic fertilizer, and the slag is automatically discharged through a hydraulic slag discharger and used as a raw material for building materials.
| Model | Output calorific value(10^4kcal/h) | Heat temperature℃ | Thermal efficiency(%) | Installed capacity(kW) | Weight | Dimensions |
|---|---|---|---|---|---|---|
| 90 | 90 | 100~800 | ≥88 | 1.5kw | 10t | 2.5*1.6*2.2m |
| 120 | 120 | 3kw | 13t | 3.2*1.7*2.2m | ||
| 180 | 180 | 5.5kw | 14t | 3.2*1.9*2.2m | ||
| 240 | 240 | 5.5kw | 15t | 3.5*2.1*2.2m | ||
| 300 | 300 | 7.5kw | 16t | 3.8*2.1*2.2m | ||
| 360 | 360 | 7.5kw | 19t | 4.3*2.1*2.4m | ||
| 480 | 480 | 11kw | 20t | 4.6*2.1*2.4m | ||
| 600 | 600 | 15kw | 21t | 5.1*2.1*2.4m | ||
| Note: The data in the table is for reference only. Please consult our company for details. | ||||||
