Question

请将锅炉专业教材的一段话译成英文

请懂英文的锅炉专业人士将教材上的一段文字译成英语：
注：本人可熟练使用英文，只是因为工作太忙才请高手帮忙，因此希望能与英文好的专家交流，非本专业的或机器翻译的一律谢绝。

6.3 流化床锅炉的种类和特点
流化床锅炉主要有下列三种类型：
1. 常压典型流化床燃烧系统 (AFBC)
2. 常压循环流化床燃烧系统 (CFBC)
3. 增压流化床燃烧系统 (PFBC)
流化质量主要取决于颗粒大小和气流速度。固体颗粒平均速度比气体增加的慢，见图6.2。平均颗粒速度和平均气体速度的差称为滑流速度。固体与气体之间的滑流速度应尽可能大，以实现良好的传热和密切接触。
如果将流体状态的沙子加热到煤的点火温度，然后将煤连续注入流化床，煤会迅速燃烧，而床可以实现均匀温度。流化床燃烧（FBC）的温度范围约为8400C 至 9500C。由于这一温度远低于灰熔融温度，因此可避免产生熔灰之类的问题。
由于传热系数很高，因此可以实现更低的燃烧温度。而高传热系数则归功于流化床中的快速混合以及通过床内传热管和传热壁而实现的高效集热。气体速度维持在最小流化速度与颗粒夹带速度之间，这样就保证了流化床的稳定运行，并避免气体流中的颗粒夹带。
燃烧过程需要三个要素(简称为3T)，即时间、温度和湍流。在流化床锅炉中，湍流是通过流体化实现的。改善混合程度可在较低温度下产生均匀分布的热能；颗粒停留时间远大于传统的固定炉排燃烧，因此，流化床燃烧系统可在较低的温度下更有效地释放热能。
由于用石灰石充当颗粒床，因此不需采用任何附加设备就可控制燃烧室中氧化硫和氧化氮的排放，这也是流化床锅炉相对于传统锅炉的主要优点之一。
看见天线 - 二级居然不相信我可以熟练使用英文，看看我的问题回答就知道了！

Answer 1

6.3 流化床锅炉的种类和特点
流化床锅炉主要有下列三种类型：
1. 常压典型流化床燃烧系统 (AFBC)
2. 常压循环流化床燃烧系统 (CFBC)
3. 增压流化床燃烧系统 (PFBC)
6.3 Types of Fluidized Bed Combustion Boilers
There are three basic types of fluidized bed combustion boilers:
1. Atmospheric classic Fluidized Bed Combustion System (AFBC)
2. Atmospheric circulating Fluidized Bed Combustion System (CFBC)
3. Pressurized Fluidized Bed Combustion System (PFBC)

流化质量主要取决于颗粒大小和气流速度。固体颗粒平均速度比气体增加的慢，见图6.2。平均颗粒速度和平均气体速度的差称为滑流速度。固体与气体之间的滑流速度应尽可能大，以实现良好的传热和密切接触。
Fluidization depends largely on the particle size and the air velocity. The mean solids velocity increase at a lower rate than does the gas velocity, as illustrated in Figure 6.2. The difference between the mean solid velocity and mean gas velocity is called slip velocity. Maximum slip velocity between the solids and the gas is desirable for good heat transfer and intimate contact.

如果将流体状态的沙子加热到煤的点火温度，然后将煤连续注入流化床，煤会迅速燃烧，而床可以实现均匀温度。流化床燃烧（FBC）的温度范围约为8400C 至 9500C。由于这一温度远低于灰熔融温度，因此可避免产生熔灰之类的问题。
If sand particles in a fluidized state is heated to the ignition temperatures of coal, and coal is injected continuously into the bed, the coal will burn rapidly and the bed attains a uniform temperature. The fluidized bed combustion (FBC) takes place at about 8400C to 9500C. Since this temperature is far below the ash fusion temperature, melting of ash and associated problems are avoided.

由于传热系数很高，因此可以实现更低的燃烧温度。而高传热系数则归功于流化床中的快速混合以及通过床内传热管和传热壁而实现的高效集热。气体速度维持在最小流化速度与颗粒夹带速度之间，这样就保证了流化床的稳定运行，并避免气体流中的颗粒夹带。
The lower combustion temperature is achieved because of high coefficient of heat transfer, as a result of rapid mixing in the fluidized bed and effective extraction of heat from the bed through in-bed heat transfer tubes and walls of the bed. The gas velocity is maintained between minimum fluidization velocity and particle entrainment velocity. This ensures stable operation of the bed and avoids particle entrainment in the gas stream.

燃烧过程需要三个要素(简称为3T)，即时间、温度和湍流。在流化床锅炉中，湍流是通过流体化实现的。改善混合程度可在较低温度下产生均匀分布的热能；颗粒停留时间远大于传统的固定炉排燃烧，因此，流化床燃烧系统可在较低的温度下更有效地释放热能。
Combustion process requires the three “T”s that is Time, Temperature and Turbulence. In FCB, turbulence is promoted by fluidization. Improved mixing generates evenly distributed heat at lower temperature. Residence time is many times greater than conventional grate firing. Thus an FBC system releases heat more efficiently at lower temperatures.

由于用石灰石充当颗粒床，因此不需采用任何附加设备就可控制燃烧室中氧化硫和氧化氮的排放，这也是流化床锅炉相对于传统锅炉的主要优点之一。
Since limestone is used as particle bed, control of sulfur dioxide and nitrogen oxide emissions in the combustion chamber is achieved without any additional control equipment. This is one of the major advantages over conventional boilers.

Answer 2

6.3 Types and characteristics of fluidized bed boiler
Fluidized bed boilers are mainly the following three types:
1. The typical atmospheric fluidized bed combustion system (AFBC)
2. Atmospheric circulating fluidized bed combustion system (CFBC)
3. Pressurized fluidized bed combustion systems (PFBC)
Streaming quality is mainly determined by particle size and flow rate. Solid particles increase the average speed slower than the gas, shown in Figure 6.2. The average particle velocity and the average gas velocity difference is called slip flow velocity. Slip between the solid and gas flow rate should be as large as possible in order to achieve good heat transfer and close contact.
If the fluid state of the sand is heated to ignition temperature of coal, and then straight into the fluidized bed of coal, coal burning quickly, while the bed can achieve a uniform temperature. Fluidized bed combustion (FBC) temperature range is about 8400C to 9500C. Since this temperature is far below the ash melting temperature, so you can avoid problems like molten ash.
As the heat transfer coefficient is high, it can achieve a lower combustion temperature. And the high heat transfer coefficient is attributed to the rapid mixing and fluidized bed heat transfer through the tube and heat transfer wall and to achieve efficient collector. Gas velocity to maintain a minimum fluidization velocity and particle entrainment between the rate, thus ensuring the stable operation of the fluidized bed and to avoid particle entrainment in the gas stream.
Combustion process requires three elements (referred to as 3T), namely, time, temperature and turbulence. In a fluidized bed boiler, the turbulence through the fluidized achieve. To improve the degree of mixing can be produced at lower temperatures, evenly distributed heat; particle residence time is much larger than the traditional fixed-grate combustion, therefore, fluidized bed combustion system can be at a lower temperature to release heat more effectively.
As the use of limestone as granular bed, so without using any additional equipment can control the combustion chamber in the sulfur and nitrogen oxides emissions, which is fluidized bed boiler in relation to one of the main advantages of a traditional boiler.

Answer 3

好难……

Answer 4

本人可熟练使用英文，只是因为工作太忙才请高手帮忙

Answer 5

用google翻译很快的
6.3 Types and characteristics of fluidized bed boiler
Fluidized bed boilers are mainly the following three types:
1. The typical atmospheric fluidized bed combustion system (AFBC)
2. Atmospheric circulating fluidized bed combustion system (CFBC)
3. Pressurized fluidized bed combustion systems (PFBC)
Streaming quality is mainly determined by particle size and flow rate. Solid particles increase the average speed slower than the gas, shown in Figure 6.2. The average particle velocity and the average gas velocity difference is called slip flow velocity. Slip between the solid and gas flow rate should be as large as possible in order to achieve good heat transfer and close contact.
If the fluid state of the sand is heated to ignition temperature of coal, and then straight into the fluidized bed of coal, coal burning quickly, while the bed can achieve a uniform temperature. Fluidized bed combustion (FBC) temperature range is about 8400C to 9500C. Since this temperature is far below the ash melting temperature, so you can avoid problems like molten ash.
As the heat transfer coefficient is high, it can achieve a lower combustion temperature. And the high heat transfer coefficient is attributed to the rapid mixing and fluidized bed heat transfer through the tube and heat transfer wall and to achieve efficient collector. Gas velocity to maintain a minimum fluidization velocity and particle entrainment between the rate, thus ensuring the stable operation of the fluidized bed and to avoid particle entrainment in the gas stream.
Combustion process requires three elements (referred to as 3T), namely, time, temperature and turbulence. In a fluidized bed boiler, the turbulence through the fluidized achieve. To improve the degree of mixing can be produced at lower temperatures, evenly distributed heat; particle residence time is much larger than the traditional fixed-grate combustion, therefore, fluidized bed combustion system can be at a lower temperature to release heat more effectively.
As the use of limestone as granular bed, so without using any additional equipment can control the combustion chamber in the sulfur and nitrogen oxides emissions, which is fluidized bed boiler in relation to one of the main advantages of a traditional boiler.

Answer 6

译文：
6.3 Types and characteristics of fluidized bed boiler
Fluidized bed boilers are mainly the following three types:
1. The typical atmospheric fluidized bed combustion system (AFBC)
2. Atmospheric circulating fluidized bed combustion system (CFBC)
3. Pressurized fluidized bed combustion systems (PFBC)
Streaming quality is mainly determined by particle size and flow rate. Solid particles increase the average speed slower than the gas, shown in Figure 6.2. The average particle velocity and the average gas velocity difference is called slip flow velocity. Slip between the solid and gas flow rate should be as large as possible in order to achieve good heat transfer and close contact.
If the fluid state of the sand is heated to ignition temperature of coal, and then straight into the fluidized bed of coal, coal burning quickly, while the bed can achieve a uniform temperature. Fluidized bed combustion (FBC) temperature range is about 8400C to 9500C. Since this temperature is far below the ash melting temperature, so you can avoid problems like molten ash.
As the heat transfer coefficient is high, it can achieve a lower combustion temperature. And the high heat transfer coefficient is attributed to the rapid mixing and fluidized bed heat transfer through the tube and heat transfer wall and to achieve efficient collector. Gas velocity to maintain a minimum fluidization velocity and particle entrainment between the rate, thus ensuring the stable operation of the fluidized bed and to avoid particle entrainment in the gas stream.
Combustion process requires three elements (referred to as 3T), namely, time, temperature and turbulence. In a fluidized bed boiler, the turbulence through the fluidized achieve. To improve the degree of mixing can be produced at lower temperatures, evenly distributed heat; particle residence time is much larger than the traditional fixed-grate combustion, therefore, fluidized bed combustion system can be at a lower temperature to release heat more effectively.
As the use of limestone as granular bed, so without using any additional equipment can control the combustion chamber in the sulfur and nitrogen oxides emissions, which is fluidized bed boiler in relation to one of the main advantages of a traditional boiler.