CN2627415Y

CN2627415Y - Condensing phase change-liquid bath type gas and fuel oil hot-water boiler

Info

Publication number: CN2627415Y
Application number: CN 03232528
Authority: CN
Inventors: 郑莆燕; 齐进; 姚秀平; 王启杰; 张莉
Original assignee: Shanghai University of Electric Power
Current assignee: Shanghai University of Electric Power; University of Shanghai for Science and Technology
Priority date: 2003-06-26
Filing date: 2003-06-26
Publication date: 2004-07-21
Anticipated expiration: 2013-06-26

Abstract

The utility model relates to a condensation-type phase change-liquid bath gas/fuel hot-water boiler belonging to the improvement of the prior phase change-liquid bath hot-water boiler using combustion of gas or liquid fuel. The utility model is characterized in that a flue condensation tube is arranged closely to the exit of a flue tube in the lower part of a chimney, to absorb the sensible heat of the low-temperature flue at the flue tube exit and the condensation latent heat of the vapor contained in the flue. The boiler provides the heat exchange by using heating media in a phase change-liquid bath mode. The boiler has the advantages of the prior phase change-liquid bath hot-water boiler: no scaling inside the boiler, no dry burning on the heat-exchanger surface, long service life, effective isolation of heat-exchange fluid, good self-regulation function, high safety, no additional use of degassing equipment, and no additional preservation and maintenance during the shutdown period. Additionally, the boiler can completely utilize the low-temperature waste heat.

Description

Condensing phase transformation-bath of liquid gas fuel hot-water boiler

Technical field

The present invention relates to a kind of boiler, particularly a kind of condensing phase transformation-bath of liquid gas fuel hot-water boiler.

Background technology

For reducing environmental pollution, the many areas of China substitute coal-burning boiler in the past with the hot-water boiler of natural gas fuel or light oil.The boiler exhaust gas vapour content height of combustion natural gas or light oil, latent heat content is big, if this part latent heat utilization can be got up, the efficient of boiler can increase substantially.Therefore, more existing at present producers have developed the condensing hot-water boiler.Yet when working under common hot-water boiler and the situation about not handling relatively poor in water quality, heating surface is easy to fouling, and service life is short.03232523.1 " phase transformation-liquid bath type gas fuel hot-water boiler " by the applicant's application overcome the easy fouling of plain cylindrical furnace, short shortcoming of life-span, but when adopting clean water to make heating agent, owing to be subjected to the restriction of heating agent operating temperature, the exhanst gas outlet temperature can not be lower than 100 ℃, makes the vapour latent heat in the smoke evacuation can't obtain utilizing.

Summary of the invention

The purpose of this utility model is in order to utilize the latent heat of water vapour in the flue gas, can rely on variation of heating agent liquid level and heat-transfer surface heat-transfer character to change again and keep the Heat Room internal pressure relatively stable automatically, a kind of condensing phase transformation-bath of liquid gas fuel hot-water boiler based on " phase transformation-liquid bath type gas fuel hot-water boiler " is provided.

The technical solution of the utility model is, in the pipeline of heating agent, be in series with Heat Room successively, air-stopper, the U-shaped pipe, liquid reserve tank, floating cover, vent valve and safety valve are equipped with in the Heat Room top, liquid level gauge is equipped with in the side, liquid reserve tank is positioned at the Heat Room over top, floating cover is positioned at the liquid reserve tank top, the heated fluid heat-transfer surface that the Heat Room internal upper part is equipped with is made up of two coil pipes, what the bottom was equipped with gives the hot fluid heat-transfer surface by flue, chamber and smoke pipe composition strile-backs, the arrival end of flue is equipped with burner, the outlet side of smoke pipe is equipped with chimney, between flue and chimney, be equipped with explosion proof door, it is characterized in that be equipped with the flue gas condensing pipe in nearly smoke pipe exit, chimney bottom, chimney bottom is equipped with the condensate liquid processor.Flue gas condensing is effective to absorb the condensation latent heat of water vapour in the sensible heat of smoke pipe exit low-temperature flue gas and the flue gas, and the condensate liquid processor is used for collection, neutralisation treatment and discharging flue gas condensing liquid.

The utility model is the remodeling that uses the phase transformation-liquid bath type hot-water boiler of gas or liquid fuel to a kind of, be equipped with the flue gas condensing pipe in nearly smoke pipe exit, chimney bottom, be used for absorbing the condensation latent heat of water vapour in the sensible heat of smoke pipe exit low-temperature flue gas and the flue gas, therefore, it also is with the heat exchange of " phase transformation-bath of liquid " mode by heating agent, the advantage that had both had phase transformation-liquid bath type hot-water boiler: non-scaling in the stove, heat-transfer surface can be by dry combustion method, long service life, heat exchanging fluid effectively can be isolated, self-tuning performance is good, safe, do not need to dispose and need not to adopt advantages such as extra anticorrosion maintain measure between air-extractor and lay-off period, low temperature exhaust heat is fully used.

Description of drawings

Fig. 1 is the utility model structure principle chart.

The specific embodiment

By shown in Figure 1, in the pipeline of heating agent, be in series with Heat Room 3 successively, air-stopper 4, U-shaped pipe 6, liquid reserve tank 13, floating cover 15, vent valve 12 and safety valve 11 are equipped with in Heat Room 3 tops, liquid level gauge 7 is equipped with in the side, liquid reserve tank 13 is positioned at Heat Room 3 over top, floating cover 15 is positioned at liquid reserve tank 13 tops, the heated fluid heat-transfer surface that Heat Room 3 internal upper parts are equipped with is by two

coil pipes

10,18 form, what the bottom was equipped with gives the hot fluid heat-transfer surface by flue 2, chamber 5 and smoke pipe 21 compositions strile-back, the arrival end of flue 2 is equipped with burner 1, the outlet side of smoke pipe 21 is equipped with chimney 16, between flue 2 and chimney 16, be equipped with explosion proof door 22, be characterized in, be equipped with flue gas condensing pipe 19, be used for absorbing the condensation latent heat of water vapour in the sensible heat of smoke pipe exit low-temperature flue gas and the flue gas in nearly smoke pipe 21 exits, chimney 16 bottoms; Chimney bottom is equipped with condensate liquid processor 23, is used for collection, neutralisation treatment and discharging flue gas condensing liquid.8,9 is outlet, the import of heated fluid one among the figure, and 17,20 is outlet, the import of heated fluid two, and 14 is implementation of port.

Adopt clean water as heating agent in the utility model.

Fuel of the present utility model can be natural gas, also can be light oil.Fuel and air spray in the flue through burner and burn, and the flue gas of generation is and gives hot fluid, and flue gas is flowed through flue 2, the chamber 5 of strile-bacing, smoke pipe 21, flue gas condensing pipe 19, chimney 16 back rows to atmosphere.Flue gas in flue based on radiation heat transfer; In smoke pipe based on heat convection; Existing heat convection has condensing heat-exchange again outside the flue gas condensing pipe.

Heated fluid in the utility model is the water of two kinds of different parameters.The current of first kind of parameter absorb the heat that heating agent passes over through import 9 during to the coil pipe 10 of Heat Room internal upper part, and temperature raises and flows out boilers after export 8.The water of second kind of parameter is at first flowed through import 20 to flue gas condensing pipe 19, and absorb the condensation latent heat of water vapour in the sensible heat of boiler tail low-temperature flue gas and the flue gas, enter the coil pipe 18 of Heat Room internal upper part then, absorb the heat that heating agent passes over, temperature raises and flows out boiler after export 17.

Claims

1. condensing phase transformation-bath of liquid gas fuel hot-water boiler, in the pipeline of heating agent, be in series with Heat Room (3) successively, air-stopper (4), U-shaped pipe (6), liquid reserve tank (13), floating cover (15), vent valve (12) and safety valve (11) are equipped with in Heat Room (3) top, liquid level gauge (7) is equipped with in the side, the heated fluid heat-transfer surface that Heat Room (3) internal upper part is equipped with is by two coil pipes (10), (18) form, what the bottom was equipped with gives the hot fluid heat-transfer surface by flue (2), chamber (5) and smoke pipe (21) composition strile-backs, liquid reserve tank (13) is positioned at Heat Room (3) over top, floating cover (15) is positioned at liquid reserve tank (13) top, the arrival end of flue (2) is equipped with burner (1), the outlet side of smoke pipe (21) is equipped with chimney (16), between flue (2) and chimney (16), be equipped with explosion proof door (22), it is characterized in that, be equipped with the flue gas condensing pipe (19) that is used for absorbing water vapour condensation latent heat in smoke pipe exit low-temperature flue gas sensible heat and the flue gas in the nearly smoke pipe in chimney (16) bottom (21) exit.

2. condensing phase transformation according to claim 1-liquid bath type gas fuel hot-water boiler is characterized in that, chimney (16) bottom is equipped with and is used for collecting, the flue gas condensing liquid processor (23) of neutralisation treatment and discharging flue gas condensing liquid.