Deashing method of rotary tube bundle heat exchanger

Abstract

The invention discloses a deashing method of a rotary tube bundle heat exchanger. The rotary tube bundle heat exchanger comprises an upper outer cover (1), a lower outer cover (7) and a multiple groups of heat exchanging tube bundles (6), wherein an ash cleaner (5) capable of sliding along each group of heat exchanging tube bundles (6) up and down is sleeved on each group of heat exchanging tube bundles (6) of the rotary tube bundle heat exchanger; and each ash cleaner is provided with a steel wire brush (11). When the heat exchanger tube bundles rotate, the ash cleaners slide downwards by means of self weight respectively when the heat exchanger tube bundles rotate to the upper and lower vertical planes; and the steel wire brushes on the ash cleaners (5) automatically clean ash for the heat exchanger tube bundles. Through the rotary working way of the heat exchanger tube bundles, the deashing method and a heat exchanging device are organically combined, so that the rotary tube bundleheat exchanger is continuously and automatically cleaned while running, the working efficiency of the rotary tube bundle heat exchanger is effectively improved, and the deashing cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of heat exchange, and mainly relates to a method for cleaning dust of a rotary tube bundle heat exchanger. It can be used together with the rotary tube bundle heat exchanger organically. Background technique [0002] In the existing high-temperature flue gas heat exchange, the flue gas contains a large amount of dust, and the dust is fine, and it is easy to accumulate dust on the heating surface of the heat exchanger, which affects the heat transfer effect of the heat exchanger heating surface. In order to prevent dust accumulation, improve the thermal efficiency of the heat exchanger, and achieve the purpose of safe and stable operation, it is necessary to clean the heat exchanger. At present, the commonly used cleaning methods in the market mainly include: soot blower, sonic cleaning, combustible gas deflagration soot blowing and mechanical vibration device. The soot blower is a traditional mechanical so...

AI Technical Summary

Problems solved by technology

The soot blower is a traditional mechanical soot cleaning method. The advantage is that the pressure of the soot blowing medium is high, the injection speed is high, and it can remove the ash with strong adhesion; the disadvantage is that the one-time investment is large, and there are dead ends for blowing. Incomplete, high operating costs

The sonic cleaning method is difficult and expensive to manufacture the vibrating diaphragm of the soot blower, which needs to be replaced continuously, the maintenance workload is heavy, the cost is high, and the continuous noise above 140 decibels is harmful to the human body

The principle of combustible gas deflagration soot blowing method is to use combustible gas (coal gas, acetylene, natural gas, petroleum liquefied petroleum gas, etc.) Acting on the dust-depositing surface, it produces a kind of effect of pressing first and then pulling the dust-depositing surface, so that the dust on the dust-depositing surface is broken due to the impact, and the effect of thorough dust removal is achieved. Although it spreads in all directions, has a large effective range, and does not Leave a dead angle, but the soot blowing system is complicated, the safety is poor, the equipment cost is high, and the investment is large

The advantage of the mechanical rapping method is that it consumes less power and does not add additional media to the flue gas, but the disadvantage is that it has a certain degree of adverse effects on the service life and strength of the boiler tubes and welding seams

[0003] Although the above-mentioned main flue gas cleaning methods have certain effects in practice, they all have the problem of high cost of use, and are mainly aimed at cleaning ordinary heat exchangers, while rotary tube bundle exchanges Heater (patent applied for) is not the best cleaning method

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