CN205717182U - CFBB ash exhauster - Google Patents

Abstract

The utility model provides a circulating fluidized bed boiler ash discharge device. Because the side wall of the flue is provided with a manhole, the manhole corresponds to the ash discharge branch pipe and is located at the same height, and the ash discharge branch pipe is connected with the ash discharge main pipe. Therefore, after being cleaned from the equipment in the flue, the dust can be poured into the ash discharge branch pipe through the manhole, and then slide down to the bottom of the ash discharge main pipe, avoiding the frequent manual handling of dust. Therefore, the circulating fluidized bed boiler ash discharge device of the present utility model .

Description

Circulating fluidized bed boiler ash discharge device

technical field

The utility model belongs to the technical field of boilers, in particular to an ash discharge device for a circulating fluidized bed boiler.

Background technique

With the development of society, people's daily life and the operation of factories are inseparable from electric energy. At present, the methods of power generation include thermal power generation, wind power generation, hydropower generation, nuclear power generation and geothermal power generation, and a considerable part of them uses thermal power generation. , The thermal power generation system includes a combustion system (with the boiler as the core), which needs to consume fossil fuels, and fossil fuels are generally non-renewable energy sources, and will produce carbon dioxide and other gases that pollute the environment after combustion.

Now, there are many chicken farms all over the country, including many large-scale chicken farms. These chicken farms produce a lot of chicken manure every day. Only a small amount of these chicken manures are made into organic fertilizers, and most of them are not treated. Together or landfill, both accumulation and landfill will cause serious pollution to water and air. Therefore, through research, people use chicken manure as fuel to generate electricity, which solves the pollution caused by chicken manure to the environment and realizes the sustainable development of energy. Moreover, chicken manure is used instead of traditional fuels such as coal, and it will not produce carbon dioxide and other environmental pollution. gas. However, due to the high viscosity of the fly ash produced by the combustion of chicken manure, it is easy to stick to the convection tube bundle, superheater, economizer and air heater preheater, resulting in serious ash accumulation, which makes the heat transfer efficiency low and affects the operation of the boiler. The circulating fluidized bed boiler with the patent number CN104315505A is equipped with a steam soot blower on the upper part of the tail flue to clean the dust on the equipment in the flue. of dust. Therefore, it still needs to be manually removed, but when the ash is removed after the furnace is shut down, the amount of ash removed is large and needs to be transported to the bottom of the furnace, so the labor intensity of the workers is high, it takes a lot of time, and the operation is not easy. Safety.

Contents of the invention

The purpose of the utility model is to provide a safe circulating fluidized bed boiler ash discharge device which saves time, reduces labor intensity of workers, not only saves time but also reduces labor intensity of workers and improves the safety of workers.

The utility model provides a circulating fluidized bed boiler ash discharge device, which includes: a furnace body 101, a separator 102, a feeder 103, and a convection device installed in a vertical flue 104 from top to bottom and connected in sequence. Tube bundle 106, high-temperature superheater 107, low-temperature superheater 108, high-temperature economizer 109, medium-temperature economizer 110, low-temperature economizer 111, primary air preheater 112, secondary air preheater 113, and ash discharge Unit, the ash discharge unit comprises: ash discharge main pipe 21 and at least one ash discharge branch pipe 22 connected with the ash discharge main pipe 21, the flue 104 is provided with a manhole 105 corresponding to the ash discharge branch pipe 22 one by one, and the manhole 105 is connected with the ash discharge branch pipe 22. The nozzles of the corresponding ash discharge branch pipes 22 are located at the same height.

The circulating fluidized bed boiler ash discharge device of the present utility model can be further improved and limited, wherein, the lower side wall of the ash discharge branch pipe 22 is inclined downward. It is convenient to pour the dust into the ash discharge branch pipe 22 and slide into the ash discharge main pipe 21.

The ash discharge device of the circulating fluidized bed boiler of the present invention can also be further improved and limited. The ash discharge device of the circulating fluidized bed boiler also includes a dust collector 114 connected to the bottom of the flue 104 and a induced draft fan 115. It is used to remove dust from the flue gas in the flue to avoid polluting the environment.

The circulating fluidized bed boiler ash discharge device involved in the utility model, because the side wall of the flue is provided with a manhole, the manhole corresponds to the ash discharge branch pipe, and is located at the same height, and the ash discharge branch pipe is connected with the ash discharge main pipe, so After being cleaned from the equipment in the flue, the dust can be poured into the ash discharge branch pipe through the manhole, and then slide down to the bottom of the ash discharge main pipe, avoiding the frequent manual transportation of dust. Therefore, the circulating fluidized bed boiler ash discharge device of the present utility model.

Description of drawings

Fig. 1 is a schematic structural view of a circulating fluidized bed boiler ash discharge device in an embodiment of the present invention.

detailed description

In order to make the technical means, creative features, goals and effects of the utility model easy to understand, the following embodiments will be combined with the accompanying drawings to describe the circulating fluidized bed boiler ash discharge device of the utility model in detail.

As shown in Figure 1, the circulating fluidized bed boiler ash removal device includes: a furnace body 101, a separator 102, a feeder 103, a flue 104, a convection tube bundle 106, a high-temperature superheater 107, a low-temperature superheater 108, a high-temperature coal-saving 109, medium temperature economizer 110, low temperature economizer 111, primary air preheater 112, secondary air preheater 113, dust collector 114, induced draft fan 115, chimney 116 and ash cleaning unit.

The upper part of the furnace body 101 is connected to the air inlet of the separator 102 , the discharge port of the separator 102 is connected to the feeder 103 , and the feeder 103 is connected to the bottom of the furnace body 101 . The air outlet of the separator 102 is connected with the top of the flue 104 .

Convection tube bundle 106, high temperature superheater 107, low temperature superheater 108, high temperature economizer 109, medium temperature economizer 110, low temperature economizer 111, primary air preheater 112 and secondary air preheater 113 along the flue gas The direction of the flow direction, that is, installed in the flue 104 from top to bottom, and connected in sequence. The bottom of the flue 104 is connected with the dust remover 114, and the dust remover 114 is connected with the induced draft fan 115, which is used to remove dust from the flue gas, so as to prevent the flue gas from polluting the environment. The induced draft fan 115 is connected with the chimney 116, and the clean gas after dust removal Exhausted from the chimney 116.

The side wall of the flue 104 is provided with at least one manhole 105 , and the ash discharge unit includes a main ash discharge pipe 21 , at least one ash discharge branch pipe 22 and a valve 23 . In this embodiment, four manholes 105 and four branch ash discharge pipes 22 are provided on the side wall of the flue 104 . Valve 23 is arranged on the bottom of ash discharge main pipe 21, and is used for controlling the ash discharge amount of ash discharge main pipe 21. The four ash discharge branch pipes 22 are respectively connected with the ash discharge main pipe 21, and the four ash discharge branch pipes 22 correspond to the four manholes 105 respectively, and each ash discharge branch pipe 22 is located at the same height as the corresponding manhole 105. Therefore, after the workers have cleaned the dust on the equipment, they can pour the dust into the corresponding ash discharge branch pipe 22 through the nearest manhole 105, thereby avoiding the frequent up and down of the workers, saving time and reducing labor intensity. At the same time, it also improves the safety of workers at work. The lower side wall of each ash discharge branch pipe 22 is inclined downward, therefore, the dust poured into the ash discharge branch pipe 22 can slide down to the bottom of the ash discharge main pipe 21 automatically.

The position of the manhole 105 on the side wall of the flue should be set according to the conditions of the equipment in the flue 104, so that there is a manhole near the height of each equipment. In this embodiment, the four manholes 105 are set at heights corresponding to the high temperature superheater 107 , the high temperature economizer 109 , the medium temperature economizer 110 and the primary air preheater 112 .

The above embodiments are preferred cases of the present utility model, and are not intended to limit the protection scope of the present utility model.

Claims (3)

1. A circulating fluidized bed boiler ash discharge device is characterized in that it comprises: a furnace body, a separator, a feeder, a convection tube bundle installed in a vertical flue from top to bottom and connected in sequence, a high temperature superheating device, low temperature superheater, high temperature economizer, medium temperature economizer, low temperature economizer, primary air preheater and secondary air preheater, it is characterized in that it also includes: ash discharge unit, the ash discharge unit It includes: ash discharge main pipe and at least one ash discharge branch pipe connected with the ash discharge main pipe, the side wall of the flue is provided with manholes corresponding to the ash discharge branch pipes one by one, and the manholes are connected with the corresponding ash discharge branch pipes. The mouths of the corresponding ash discharge branch pipes are located at the same height. 2 . The circulating fluidized bed boiler ash discharge device according to claim 1 , wherein, the lower side wall of the ash discharge branch pipe is inclined downward. 3 . 3. The circulating fluidized bed boiler ash removal device according to claim 1, further comprising: a dust remover connected to the bottom of the flue, and an induced draft fan connected to the dust remover.