Continuous blowdown and recirculating device at bottom of hot water boiler

Abstract

The invention discloses a continuous blowdown and recirculating device at the bottom of a hot water boiler. A mace-type dirt suction pipe is arranged at the lower part inside the boiler, and a boiler blowdown pipe is arranged at the bottom of the boiler; the mace-type dirt suction pipe is connected with the boiler blowdown pipe; the boiler blowdown pipe is connected with a continuous discharge three-way valve; the continuous discharge three-way valve is connected with a dirt removing three-way valve through a pipeline; the dirt removing three-way valve is connected with a spherical dirt remover through a pipeline; the spherical dirt remover is successively connected with a flowmeter, a flow regulating valve and a circulating pump through a pipeline; the circulating pump is connected on the boiler through a pipeline; and one end of the dirt removing three-way valve is connected with the circulating pump through a back flushing pipe. Compared with the existing periodic blowdown device, the continuous blowdown and recirculating device has the following advantages that continuous blowdown, no dirt or small-volume dirt deposition are achieved, and boiler bulging or boiler tube clogging can be effectively prevented; heat transfer between the inner wall of the boiler and water is not obstructed by impurities, and the operation thermal efficiency of the boiler is high; and the recirculating-type dirt removing way can effectively save heat and the water and the safe and economical operation of the boiler can be realized.

Description

technical field [0001] The invention relates to a hot water boiler, in particular to a continuous blowdown recirculation device at the bottom of the hot water boiler. Background technique [0002] The TSG G0001-2012 "Boiler Safety Technical Supervision Regulations" formulated by the General Administration of Quality Supervision, Inspection and Quarantine and implemented on June 1, 2013 stipulates in Chapter 10 "Hot Water Boilers and Systems": Shell-type horizontal type For external combustion boilers, the design and manufacturing units shall take technical measures to solve the problems of tube plate cracks or leakage and boiler shell bulging. [0003] In recent years, Zaozhuang heating and hot water boilers have repeatedly experienced drum bulging and water leakage accidents caused by a large amount of dirt deposition. The reason is that it is difficult to effectively discharge the sewage in the boiler to the outside of the boiler by the blowdown method of the hot water bo...

AI Technical Summary

Problems solved by technology

The disadvantage is that it is necessary to design pipeline pumps and mixing pipelines, water spraying and stirring will cause damage to natural circulation, continuous operation of pipeline pumps will cause waste of electric energy, and the use of the original fixed sewage outlet at the lower part of the drum has poor sewage suction effect

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