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biomass pellet fired steam boiler

Introduction: ZOZEN biomass pellet fired steam boiler can burn biomass shaped particles, wood chips, corncobs and wood chips, and is widely used in heating, chemical industry, food, tobacco, textile, printing and dyeing, feed, medicine, building materials, brewing, rubber, hospitals and other industries. By analyzing the characteristics of different fuels, ZOZEN has optimized the feed hopper, the width and length of the grate, the speed of the grate reducer, the position and direction of the secondary air outlet, etc.

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Common types of the biomass pellet fuel steam boiler

The biomass pellet fuel steam boiler is a major category of industrial boiler, specifically refers to the boiler that uses biomass energy as fuel. Biomass fuel is a kind of clean fuel which can be directly burned and made into granules by crushing, drying and extruding agricultural wastes such as sawdust and straw.

The biomass pellet fuel steam boiler produced by ZOZEN mainly include the following common boiler types: DZL series biomass steam boiler, SZL series biomass steam boiler and SHL series biomass steam boiler.

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The main features of the biomass fired steam boiler
  1. The volume of fuel after molding is 1/30 ~ 40 of the volume of raw materials;
  2. The specific gravity is 10~15 times that of raw materials, and the moisture content is between 12% and 18% (the moisture content of coal is generally below 10~15);
  3. The low calorific value can reach 3500~4500 kcal (the low calorific value of class II bituminous coal is 3700 ~ 4700 kcal/kg);
  4. The ash content is less than 10% (the ash content of coal is above 20%);
  5. Volatile matter ≥ 65.62% (volatile matter of class II bituminous coal ≥ 20%).
  6. Biomass fuel is a renewable and clean energy, and it belongs to the same renewable energy as wind energy and solar energy. It is rich in resources and can ensure the sustainable utilization of energy.
  7. Biomass fuel has low sulfur and nitrogen content, and less SOx and NOx are produced during combustion.
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How to ensure full combustion of biomass pellet steam boiler?

The operation of biomass pellet steam boiler is the same as that of coal boiler, and different combustion equipment is set according to different boiler specifications and models. However, because biomass pellet fuel is compressed and molded, it has high moisture, high density, slow volatilization rate, and is not easy to catch fire and burn, and it is easy to emit black smoke.

Boiler for the dairy industry
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The production process of liquid dairy products mainly includes: raw milk acceptance, milk cleaning, refrigeration, preheating, homogenization sterilization, cooling, aseptic filling, fermentation, final product storage etc. Steam boiler is used for fermentation, disinfection, drying, etc., The sterilization of liquid dairy products and the fermentation process of sour milk are the main uses of the boilers in dairy plants. According to the experience from working with many dairy companies in the past, fermentation, disinfection and sterilization of dairy products is the main steam consumption sections. If heating and bathing heat are added, steam demand will be higher.

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What are the measures to improve the combustion efficiency of biomass boilers?

First of all, there should be enough oxygen. If the excess air coefficient is too small and the air supply is insufficient, it will increase the heat loss of incomplete combustion of solid and combustible gas, and reduce the combustion efficiency. However, the excess air coefficient in the biomass environment-friendly boiler should not be too large, otherwise it will reduce the furnace temperature and increase the heat loss of incomplete combustion.

Secondly, the anti-scaling and descaling technologies adopted by biomass environmental-friendly boilers, such as descaling agent and electronic anti-scaler, can be used to optimize the water vapor circulation system, and the plasma cutting machine can reasonably control the sewage discharge rate of the boiler, thereby reducing scale and improving the thermal efficiency of the boiler.

In addition, it is necessary to keep the flame position of biomass environmental protection boiler during combustion. The reasonable flame position should be the area between the high-end grate and the middle grate, and the fullness of the flame on the grate is good to ensure the full combustion of fuel.

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