68ky开元国际app

Welcome to Beijing Nowva Energy Technology Co., Ltd.!
CH|EN

Core Technology

Product Description

Core Technology

1.OverviewMulti-pass CFB boiler was co-developed by Beijing Nowva Energy Company and Tsinghua University, it is a high-efficiency, energy-saving, environment-friendly and reliable boiler, which is dev...

Technical Comparison

Comparison of MPCFB boiler and double-drum boiler

No. Item MPCFB boiler Double-drum boiler

1

Boiler Type

A real CFB boiler

No enough furnace height, just a renovated boiling boiler

2

Furnace Height

 

Three-stage furnace with effective height of 2.5 to 2.8 times more than that of SHXF boiler

Post-combustion often occurs due to limited furnace height

3

Ash Circulation

Two-stage ash circulation.

Carbon content in ash is low. 

Able to handle low ash coal.

Single-stage ash circulation.

Carbon content in ash is high.

The combustion effect of low ash coal is not good.

4

Thermal Efficiency

88%-92%

78%-85%

5

Separator

Medium temperature separation.

Inlet temperature of separator is 500℃.

Separator has longer life and less heat loss.

No post-combustion exits and no coking occurs in separator.

High temperature separation.

Inlet temperature of separator is 850~900℃.

Separator has shorter life and more heatloss.

Post-combustion exits and coking easily occurs in separator.

6

Furnace Structure

Membrane structure, good sealing with small heat loss.

Some boilers adopt smooth tube structure.

Poor sealing with large air leakage and heavy furnace wall.

7

Construction

Cost

Single layer arrangement with lower construction cost.

Two layers are arranged, a 3.5-5m civil engineering support layer at the lower part.

Higher construction cost.

8

Fuel Adaptability

 

Good fuel adaptability to 1500~6000Kcal/kg fuels.

It can burn inferior fuel and high volatile fuel.

Can not burn high volatile fuel.

9

Abrasion

No convection tube bundle.

Convection tube bundle produces heavy abrasion.

多流程循环流化床锅炉与立式循环流化床锅炉的比较

序号 项目 多流程循环流化床锅炉 立式循环流化床

1

产品规格

锅炉出力在6~160t/h;

35t/h以上较多,但35t/h以下锅炉非常罕见。

2

燃烧行程

三级炉膛,有效燃烧行程是立式循环流化床的1.6-1.8倍,燃烧时间长,燃尽率高。

单级炉膛,燃烧时间短。比较难于燃烧高挥发分的褐煤、生物质燃料等。

3

灰循环

两级回灰,飞灰含碳量低。能够处理低灰分煤炭。

一级回灰,飞灰含碳量高。对低灰分煤炭燃烧效果不好。

4

热效率

88-92%

86-90%

5

分离器

中温分离,分离器进口温度500℃,分离器寿命长,散热损失少。不存在后燃现象,分离器不结焦。

高温分离,分离器进口温度850~900℃,分离器寿命短,散热损失大。存在后燃现象,分离器易结焦。

6

土建成本

锅炉高度低,单层布置,土建成本低。

锅炉高度高,土建成本高。

7

燃料适应性

燃料适应性好,可燃劣质燃料、高挥发分燃料。

对高挥发分燃料、低灰分燃料适应性比较差。

技术支持:北京68ky开元国际app科技有限公司.2007 | 版权所有