CN1045855A - Micro-circulation boiler of high efficiency and energy saving - Google Patents

Abstract

The present invention is a kind of energy-saving efficient boiler that designs for the heat utilization efficiency that improves fuel, mainly by high-pressure water supply pump 1,3 pots of bodies of preheater 2 micropore injection spray pipes, 4 mist heat pipes, 5 superheaters 6, compositions such as return pipe 7, safety valve 8, fuel feeder 9, burner 10, water level meter 11.The present invention is the mandatory microcirculation convective principles of big liquid level that adopts: the present invention sends into micropore injection spray pipe 3 by high-pressure water supply pump 1 after with the water supercharging, becomes best vaporific spraying into to carry out heat exchange in the mist heat pipe 5 in water; Because in the mist heat pipe 5 is vaporific water droplet, has increased evaporation surface, has accelerated rate of heat exchange, has increased the quality and the vapor pressure of effective working medium.

Description

Micro-circulation boiler of high efficiency and energy saving

The invention belongs to Industrial Boiler.

Present boiler in the world, two classes are generally speaking arranged, one class is that flue tube boiler (also claiming a multitubular boiler) class is a water-tube boiler, the major defect of this two classes pipe furnace is that the thermal efficiency is low, its reason is that water is the non-conductor of heat, be bad at very much conduction, the heat that fuel combustion is emitted is through the metal conduction, transmit feedwater again, just near the water the inside pipe wall at first is heated, make the vibration velocity of molecule accelerate to expand, form convection current then, be difficult to be heated from tube wall water far away, must allow this part water knock tube wall over through convection current and obtain heat energy, hydrone behind interior can the increasing breaks away from the attraction of other hydrone and forms steam, so the thermal efficiency is low, the working medium that is produced in the unit interval is just few.In addition,, after the microvoid bubble in the water drains, can stop boiling, form breakneck superheated water, be easy to cause and break out boiling and make the bursting of boilers because the water in the boiler is to be in the long-time heating state.

The present invention will provide a kind of intactly can overcome above-mentioned shortcoming, improves the micro-circulation boiler of high efficiency and energy saving of heat utilization efficiency greatly, improves the temperature of heating element effectively and increases the quality of the working medium that produces in the unit interval.

Principle of the present invention is different with the principle of existing boiler, we know, water is bad at conduction, but very normal easy convection current, and big convection circulation is fast not as little convection circulation, and vaporization is relevant with the surface area of liquid, liquid temperature, air pressure etc., fluid temperature is high more, and the surface is big more, and vaporization is just fast more, according to these characteristics of liquid heat transfer and vaporization, the present invention adopts the mandatory microcirculation convective principles of big liquid level and conceives a kind of micro-circulation boiler of high efficiency and energy saving of design.

The present invention has mainly formed heat exchanger by: high-pressure water supply pump 1, preheater 2,3 pots of bodies 4 of micropore injection spray pipe (or spray nozzle), mist heat pipe 5(by micropore injection spray pipe 3, pot body 4, mist heat pipe 5, be heating element) composition such as superheater 6, return pipe 7, safety valve 8, fuel feeder 9, burner 10, water level meter 11, referring to accompanying drawing one.

Air flow direction after the fuel combustion is such, at first through in the pot body 4 to 5 heating of mist heat pipe, the superheater 6 of flowing through then, the preheater 2 of flowing through again, after the fuel combustion heat of emitting was passed to working medium like this, remaining air-flow inflow chimney after other utilizes went.

The structure of heat exchanger is such, is to connect mutually in 4 li upper ends of vertically having laid many pipes (mist heat pipe 5) mist heat pipe 5 of pot body of garden cylindricality, so that allow every mist heat pipe 5 interior steam enter superheater 6.Mist heat pipe 5 the insides are equipped with micropore injection spray pipe 3(or spray nozzle), each root micropore injection spray pipe 3 all follows preheater 2 to be communicated with, and between mist heat pipe and the mist heat pipe certain distance is arranged, and can allow the gas-flow mistake, and the heat that fuel combustion is emitted is just passed to mist heat pipe 5 smoothly.

The structure of micropore injection spray pipe 3 is metal tubes, equidistant some micropores that are drilled with on its tube wall with being staggered.Through the ejection that can from micropore, nebulize of the water of supercharging.

The structure of mist heat pipe 5 is referring to accompanying drawing two, (figure two is cross section) it be in pipe around on the wall (or outside the pipe wall on) all around made a lot of side of body sheets 12.These side of body sheets 12 have three effects.The firstth, strengthen conduction of heat, the secondth, the heat exchange area contact area of flame (or with) the 3rd that further increases droplet and pipe is that (or combustion gas) has guide effect to steam.

Mainly the principle of heat exchanger is described further below in conjunction with accompanying drawing:

Make glassware for drinking water have certain pressure to enter preheater 2 afterwards by high-pressure water supply pump 1 and carry out preheating, the water of process preheating is by micropore injection spray pipe 3(or spray nozzle) water is sprayed into the best vaporific mist heat pipe 5 that enters.The outer wall of mist heat pipe 5 contacts with flame, and temperature is very high, and conduction is passed to heat on inwall and the fin 12 through tube wall, inwall, fin 12 contacts with droplet, and droplet obtains heat energy, interior can increasing, hydrone only carry out high vibration and convection circulation (microcirculation convection current) in droplet.Because the droplet number is very big, each droplet all has a gasifying surface, this vaporization area that has just increased greatly with the plain cylindrical furnace comparison, and these hydrones that obtain heat energy can break away from liquid level at once and be in molecular state or micel state.The droplet that does not temporarily contact fin 12 in the pipe can be accepted radiant heat simultaneously, because the contact of mist heat pipe 5 inwalls is the droplet that comes continuously, fin 12 and take away heat speeds away again after the vaporization, this gasifying surface that just is equivalent to further to have increased water is long-pending, and it is that the temperature heat that absorbs that raises is wanted many a lot of doubly (heats of vaporization) more than water that water becomes heat that synthermal vapour absorbs by liquid state, this has just effectively utilized the heat energy that burning is emitted, improved heat utilization efficiency and the efficient of boiler to fuel, because liquid level increases, the microcirculation convection current is fast, accelerated vaporization rate greatly, produce more effectively working medium in unit interval, increased the quality of effective working medium, helped pushing away machine works.The above is exactly a big liquid level of the present invention, mandatory microcirculation convective principles.

For prevent a spot of water from the inwall of mist heat pipe 5 toward dirty and amass and in pipe, form superheated water, return pipe 7 is all installed in bottom at mist heat pipe 5, return pipe 7 is connected with safety valve 8, and when the pressure of return pipe 7 increased to certain Cheng Du, safety valve 8 was opened and emitted water or steam.

The present invention compares with plain cylindrical furnace not exist in pot body 4 and the water of tons of will be heated to earlier more than 100 degree, and these heats can be used to direct steam generation, and the present invention is to the droplet heating, has increased disengagement area, has improved the temperature of heating element; There is not superheated water in the pot body 4 of the present invention, prevented explosive boiling; The present invention can increase the quality of effective working medium, improves steam pressure, is conducive to promote machine works. Therefore the present invention is a kind of desirable Industrial Boiler.

Claims (4)

1, one by high-pressure water supply pump 1, preheater 2, micropore injection spray pipe 3, pot body 4, mist heat pipe 5, superheater 6, return pipe 7, safety valve 8, fuel feeder 9, burner 10, water level meter 11, etc. the device formed, constituted the energy-efficient mist pipe boiler of mandatory microcirculation convection current.

2, according to claims 1, described in micropore injection spray pipe 3, it is characterized in that equidistantly being drilled with some micropores on a metal tube constitutes open injection spray pipe

3, according to claims 1, described in the pot body 4, it is characterized in that making the garden cylindricality by Nai Gaore and the very high metal of mechanical strength, the inside has been laid a lot of root mist heat pipes 5 in order

4, according to claims 1, described in mist heat pipe 5, it is characterized in that making tubulose by Nai Gaore and the very high metal of mechanical strength, have a lot of symmetry side of body sheets 12, the inside that micropore injection spray pipe 3 also is installed all around at the inwall (or outer wall) of pipe.

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