CN2338628Y

CN2338628Y - Heat-pipe type flue gas heat recovery arrangement for heating air

Info

Publication number: CN2338628Y
Application number: CN98222605U
Authority: CN
Inventors: 刘成江; 宋涛; 刘敬华; 唐清荣; 韩立伟; 李敏; 程德良; 郝振利
Original assignee: PINGDU CITY THERMO-ELECTRIC PLANT
Current assignee: PINGDU CITY THERMO-ELECTRIC PLANT
Priority date: 1998-10-12
Filing date: 1998-10-12
Publication date: 1999-09-15
Anticipated expiration: 2008-10-12

Abstract

The utility model provides a heat-pipe type fume warm air fan for boilers. The utility model is composed of gravity type heat pipes, a heating box body and heat discharge box bodies. The utility model is characterized in that the heat discharge box bodies are arranged on the both sides of the heating box body; the gravity type heat pipes are fixed between the heating box body and the heat discharge box bodies; the hot ends of the gravity type heat pipes are positioned in the heating box body; the cold ends of the gravity type heat pipes are positioned in the heat discharge box bodies. The utility model has the advantages of reasonable design, simple structure, easy manufacture, small volume, convenient operation, corrosion resistance, good energy-saving effect, long service life, etc.

Description

Tubular boiler flue gas steam air heater

The utility model relates to a kind of thermal power plant boiler auxiliary equipment, specifically a kind of tubular boiler flue gas steam air heater that is used to save energy and reduce the cost.

In order to reclaim the needs of heat and boiler combustion, large medium-size boiler is provided with air preheater, because sulfur-bearing in the coal contains sulfuric acid vapor in the flue gas after the boiler combustion, (H ₂SO ₄As long as) contain the sulfuric acid vapor of minute quantity in the flue gas, even the temperature more than 100 ℃ also can make acid water steam dewfall on the flue metallic walls, that is to say, as long as containing the flow through temperature of flue metal wall surfaces of the flue gas of sulfuric acid vapor is lower than flue gas and calculates dew point, sulfuric acid vapor in the flue gas will produce the sulfuric acid condensation water in the metal surface, flue is produced cold end corrosion,, thereby be easy to generate cold end corrosion most because the temperature of boiler air preheater smoke outlet tube wall is minimum.

In order to alleviate the cold end corrosion of boiler air preheater, boiler has to adopt higher exhaust gas temperature when design, although the exhaust gas temperature of boiler air after the air preheater preheating is generally at 155 ℃-180 ℃, but because the EAT of air preheater is lower, the temperature of air preheater smoke outlet still can be lower than flue gas acid dew point, still cold end corrosion can take place, had a strong impact on the operational reliability of air preheater, shorten the service life of air preheater, also limited the further recycling of residual heat from boiler fume simultaneously.

The way that solves cold end corrosion at present mainly contains two approach, and the one, improve exhaust gas temperature; The 2nd, the intake air temperature of raising air preheater.The existing main deficiency of above-mentioned two solutions is the heat loss that has increased boiler exhaust gas, reduces the thermal efficiency of boiler.

The purpose of this utility model provides a kind of simple in structure, heat loss that can reduce boiler, can overcome the tubular boiler flue gas steam air heater of boiler preheating device cold end corrosion again.

The purpose of this utility model realizes in the following manner, by improving the air themperature of air preheater inlet, solve cold end corrosion, what present many steam power plants used is the intake air temperature that the steam type steam air heater improves air preheater, the work thermal source of this kind steam air heater is a steam, need to consume a large amount of useful steam, energy-saving effect difference thereby be difficult to promote the use of.Steam air heater of the present utility model is to adopt hot pipe technique, and thermal source is the discharge fume afterheat after the employing air preheat, just utilizes the hot junction of heat pipe to absorb air preheater outlet high temperature air,

Accompanying drawing is the structural representation of tubular boiler flue gas steam air heater.

Explain below with reference to Figure of description tubular boiler flue gas steam air heater of the present utility model being done.

Tubular boiler flue gas steam air heater of the present utility model, its structure is to be made of gravity type heat pipe 1, be heated casing 2 and heat release casing 3, heat release casing 3 is arranged on the both sides of the casing 2 that is heated, gravity type heat pipe 1 is fixed on and is heated between casing 2 and the heat release casing 3, the hot junction of gravity type heat pipe 1 is positioned among the casing 2 that is heated, and the cold junction of gravity type heat pipe is positioned among the heat release casing 3.

Embodiment:

Its processing and fabricating of tubular boiler flue gas steam air heater of the present utility model is very simple and convenient, processing and fabricating gets final product shown in the by specification accompanying drawing, the manufacture craft of casing and heat release casing of being heated is identical with the processing technology of other auxiliary equipment of power plant, the manufacture craft of gravity type heat pipe is a known technology, can make by the interchangeable heat pipe processing technique.

Tubular boiler flue gas steam air heater of the present utility model is compared with prior art, have reasonable in design, simple in structure, be easy to characteristics such as processing, little, easy to use, corrosion-resistant, the good energy-conserving effect of volume, long service life, thereby, have good value for applications.

Except that the described technical characterictic of specification, be the known technology of those skilled in the art.

Claims

1, tubular boiler flue gas steam air heater, comprise gravity type heat pipe, casing and heat release casing are heated, it is characterized in that the heat release casing is arranged on the both sides of the casing that is heated, gravity type heat pipe is fixed on and is heated between casing and the heat release casing, the hot junction of gravity type heat pipe is positioned among the casing that is heated, and the cold junction of gravity type heat pipe is positioned among the heat release casing.