Horizontal type pulverized coal boiler with single furnace pipe

Abstract

The invention discloses a horizontal type pulverized coal boiler with a single furnace pipe. The horizontal type pulverized coal boiler comprises a shell barrel body and a plug-in barrel, wherein the single furnace pipe, a front tube plate, a rear tube plate, a front smoke box, a membrane wall backflash chamber, an outer wrapping plate and a second back stroke smoke tube are arranged in the shell barrel body, and the second back stroke smoke tube is arranged on the lower side of the single furnace pipe; a third back stroke smoke tube is arranged in the plug-in barrel and communicated with the front smoke box through a flue; a smoke outlet is further arranged on the plug-in barrel body; and the plug-in barrel body is communicated with a waterway of the shell barrel body through an outlet tube. The horizontal type pulverized coal boiler adopts the structural arrangement of the single furnace pipe, is smooth in smoke circulation by arranging the single furnace pipe on the upper portion and the smoke tube on the lower portion, and is compact in integral structure, simple in appearance distribution, small in occupation, low in steel consumption, and capable of achieving integral transportation.

Description

technical field [0001] The invention belongs to the field of coal-fired industrial boilers, in particular to a horizontal internal combustion pulverized coal boiler which uses coal powder as fuel and is used to generate steam. Background technique [0002] my country's energy structure is dominated by coal. For a long time in the future, coal-fired industrial boilers will still be the leading product of industrial boilers. [0003] The traditional industrial coal-fired boilers are mainly layer-fired boilers. The disadvantages are low combustion efficiency and serious pollution, which makes it difficult to meet the requirements of energy saving, emission reduction and pollutant discharge. [0004] Pulverized coal combustion is one of the efficient and clean combustion methods of coal, and its combustion efficiency can reach more than 96%, which is a mature combustion technology. However, there is currently no boiler dedicated to pulverized coal combustion. [0005] Existing...

AI Technical Summary

Problems solved by technology

[0008] 1. Insufficient rated power output: due to insufficient furnace space and poor heat exchange effect, the actual power usually only reaches half of the rated power

[0009] 2. Easy to coke: when the pulverized coal is burned, it will be converted into tar during the carbonization process

A large amount of tar sticks to the furnace wall, which will reduce the capacity of the furnace, thereby reducing the amount of steam generated, thereby reducing the heat exchange efficiency

[0010] 3. If you want to increase the steam output, you must increase the capacity of the furnace, which will increase the volume of the boiler

However, when the volume of the boiler increases to a certain extent, the difficulty of processing will increase greatly, and it will make it impossible to transport

[0011] 4. Ash collection: There is no soot blowing device in the boiler drum. After the pulverized coal is burned, a large amount of fly ash is accumulated in the furnace, the back combustion chamber and the inside of the flue pipe, which will cause a short circuit of the flue gas

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