Biomass Pellet Wood Chips Palm Shell Fired Steam Boiler for Oil Refining Plant

 DZL series biomass fired boiler is a single-drum vertical water-fire tube shell boiler, and the combustion equipment is a chain grate. The water walls on the left and right sides of the furnace are radiant heating surfaces, the two wings of the furnace are convective heating surfaces, and the convection heating surfaces of threaded smoke pipes are arranged in the drum. Shield shell.
This series of coal fired steam boilers use the latest scientific research results, such as: arched tube sheet, threaded smoke tube, etc., to solve the problems of shell-type boiler tube sheet cracks, bulging at the bottom of the drum, tube bursts on the water wall, low thermal efficiency, and insufficient output.

Model:Chain Grate Stoker Type Steam Boiler
Structure:Three Pass Single Drum
Fuel:Coal, Biomass, Wood, Chip, Husk, Sawdust, Jute, Shell, Waste Solid Fuel etc.
Capacity: 1 - 20 ton/h (1ton,2ton,4ton,6ton,8ton,10ton,15ton,20ton)
Pressure:0.7/1.0/1.25/1.6/2.5Mpa (7Bar/10Bar/12.5Bar/16Bar25Bar)
Temperature:170/184/194/204/225 C
Application:Food and Beverage,Textile,Plywood,Rice Mill,Chemical,Paper Mill,Rubber Plant et

Sush as: Medicine, chemical, light industry, textile, building material, cultivation, food and beverage, plastic foam, printing, dyeing and washing, rubber processing, paper products,wood processing, hotel, clothing and leather manufacturer etc.
Biomass Fired Boiler Burning process
The fuel falls from the coal hopper to the front of the grate. With the operation of the grate, the coal undergoes preheating, dry distillation, ignition, and embers. The slag falls into the slag hopper and is discharged from the furnace at any time by the slag remover. The flue gas is in the front and back arches. The throat between the throat can form a vortex to fully mix with the air, heat the front arch, improve the fire conditions, enter the two-wing convection tube bundle through the exit smoke window on the upper part of the arch, enter the threaded smoke pipe through the front smoke box, and pass through the economizer and dust collector. The induced draft fan is led to the chimney and discharged.

(1) The arched tube sheet and the threaded smoke tube are used to form the drum, so that the drum is changed from a quasi-steel body to a quasi-elastomeric structure, and the bracing parts in the tube plate area are eliminated, and the stress is reduced. The smoke pipe is changed from two-pass to single-pass, which solves the problem of tube sheet cracks.
(2) Due to the arrangement of the rising pipe row at the bottom of the drum, the dead water area at the bottom of the drum is eliminated, so that the sludge is not easy to deposit, and the high temperature area of the drum can be well cooled, preventing the bulge in the lower part of the boiler shell.
(3) The use of high-efficiency heat transfer threaded smoke pipes achieves enhanced heat transfer effects, achieves the characteristics of rapid boiler heating and pressure rise, and improves the thermal efficiency of the boiler.
(4) The structure is compact, and compared with the same type of boiler, the overall size is small, which saves the investment in the infrastructure of the boiler house.
(5) Stable operation, convenient adjustment and sufficient output. Has a certain overload capacity.
(6) Threaded smoke tube is used to enhance heat transfer, which improves the heat transfer coefficient and thermal efficiency. Because the flue gas has a disturbing effect in the tube, it is not easy to accumulate dust in the smoke tube, which plays a role of self-cleaning.
biomass boiler fuel has wide applicability, which can be applied to coal, biomass particles, sawdust, palm shell, straw and other fuels; At the same time, relevant structures shall be reasonably designed according to different fuel characteristics to ensure efficient, energy-saving and stable operation of the boiler.

DZL series wood fired steam boilers are widely used in
1. Agriculture: Breeding, greenhouse planting, seed factory.
2. Chemical industry: Fertilizer Plant, refinery, feed factory, coating factory, plastic factory, glass factory.
3. Manufacturing: Paper Mill, textile factory, food factory, shoe factory, ceramic factory furniture factory.
4. Construction Industry: Highway Use, site use.
5. Others: Accommodation and catering, bath cente, hotel, disinfection of medical instruments and clothing.

1.. What are the differences between vertical type boiler and horizontal type boiler with the same capacity?
1. Structure of vertical boiler is compact, occupy a limited area,
2. Convenient on installation and removal.
3. Low cost and investment on capital construction. Steam exhausted fast and sufficient.
1. The combustion space of horizontal is big, fuel can be burned completed.
2. The thermal efficiency is higher than the vertical boiler,
3. Horizontal type: less thermal loss, stronger output, and higher steam quality.

2. What are the limitation (size, humidity, chemical element concentrations) of coal fuel/solid fuel/wood fuel?
Size requirement of coal:6-25mm
Size requirement of blending coal: <50mm (the coal less than 6mm should less than 30%)
Diameter of biomass particle: 6~10mm, length: 25~50mm, water content < 15%, ash content < 2%, sulphur content<0.07%, chlorinity <0.07%, nitrogen content < 0.5%

3. What is the size of furnace door and blower hopper?
Size of furnace door:
Standard elliptical furnace door:300*800*1500
Blower hopper size:
2 tons conical hopper: 1400*800*1500
4 tons conical hopper: 2200*1400*1500

4. What is the combustion mode of coal/biomass fired boiler?
The combustion mode of coal/biomass fired boiler is layer combustion. Place the flue on the fixed or moved grate, to form an evenly fuel bed with a certain thickness, air comes from the bottom of grate, and combustion occurred on the fuel bed.