Economizer hopper of coal-fired boiler in power plant

Abstract

The invention discloses an economizer hopper of a coal-fired boiler in a power plant. In a reversing chamber of the economizer hopper of the coal-fired boiler, one to five stages of herringbone guide plates are arranged along the horizontal direction, or two to seven stages of T-shaped guide plates are arranged along the vertical direction; the nasal tip of the reversing chamber of the economizer hopper is additionally provided with a guide plate; the outlet of the bottom of a dust hopper is provided with a blocking valve; the outlet of the blocking valve is connected with an ash storage hopper; and the outlet of the ash storage hopper is provided with a blocking valve. The dust collecting efficiency of the economizer hopper is greatly improved; and the ash content of the flue gas entering an air preheater is effectively reduced. The economizer hopper has high operability and obvious effect, can reduce or thoroughly manage ash fouling in the air preheater so as to alleviate or avoid the low-temperature corrosion of the air preheater and reduce the cost of cleaning the ash fouling of the air preheater. The economizer hopper has the advantage of simple process flow, less equipment and easy implementation. The method is applicable to the reform design of the equipment which has been put into operation, and is also applicable to the system design of new equipment.

Description

technical field [0001] The invention relates to an economizer ash hopper of a coal-fired boiler in a power plant, in particular to an economizer ash hopper equipped with a deflector in a steering chamber to improve the effect of ash removal. Background technique [0002] Coal-fired power plants generally use low-quality coal as fuel and have a large ash content. Usually, only a small number of large-sized ash particles will be discharged from the bottom of the boiler, and the rest of the ash particles will move to the tail of the boiler with the flue gas. At the turn of the flue gas at the end of the economizer, the larger particles in the flue gas will settle down into the ash collecting hopper of the economizer due to gravity and centrifugal force, and the rest of the particles will enter the air preheater with the flue gas, and then go to the The dust collector collects the ash particles in it to achieve the discharge of flue gas dust up to the standard. [0003] Due to ...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that the dust collection efficiency of the ash hopper of the current economizer is not high, this invention adopts a new ash hopper structure, installs a deflector in the turning chamber, adds an air lock valve at the bottom of the ash collecting hopper and installs ash storage fight

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