CN2175869Y

CN2175869Y - Electric-heating boiler

Info

Publication number: CN2175869Y
Application number: CN 93209440
Authority: CN
Inventors: 李延圭
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-04-17
Filing date: 1993-04-17
Publication date: 1994-08-31
Anticipated expiration: 2003-04-17

Abstract

The utility model relates to an electric-heating boiler, which is composed of a boiler container and an electrothermal furnace. The electrothermal furnace is arranged in the electric-heating boiler. The electrothermal furnace has a couple of electrodes at least. The electric heating elements of carbon particles are filled among the electrodes. An air duct connects the inner of the electrothermal furnace with the outside of the boiler container. The electric-heating boiler can be used to produce steam or hot water. The utility model has the advantages of fast heating speed and easy control of the voltage and the current.

Description

Electric-heating boiler

The utility model relates to boilers heated electrically, and the boilers heated electrically of steam or hot water particularly takes place.

Past for the boiler that steam or hot water take place, is that the outer downside install combustion device at boiler vessel comes heating boiler, and the shortcoming of this heating means is that thermal source is passed to liquid by the wall of the container of boiler.Therefore when the temperature of control boiler, heat source temperature changes fast, and the variations in temperature of liquid is but very slow in the boiler vessel, secondly is that it is a temperature of controlling liquid in the boiler by the size of regulating burner flame, therefore is difficult to liquid in the boiler is finely tuned.

The purpose of this utility model is to provide a kind of boilers heated electrically of regulating fluid temperature in the boiler quickly and effectively.

The utility model boiler is implemented like this.Being provided with electrothermal furnace in boiler vessel, is to be filled with the plain particle of charcoal with to be insulator setting under the high temperature between the electrode of electrothermal furnace, then becomes the mixing electric heating element particle of the inorganic, metal oxide particle of semiconductor or conductor when surpassing this high temperature.Other pipe arrangement and electric control loop are formed.

Following preference elaborates to the utility model in conjunction with the accompanying drawings, but does not limit scope of the present utility model.

Fig. 1 of embodiment 1 is the profile of this boilers heated electrically part, wherein 10 is boiler parts, the 20th, the electrothermal furnace part, on the top of boiler 10 steam outlet pipe 11 is housed, air gauge 12 and safety valve 13 are equipped with in boiler 10 inside, feed pipe 14 is equipped with in the bottom of boiler vessel 10, so that provide liquid such as water to boiler 10, at feed pipe 14 places non-return valve 141 and force (forcing) pump 142 is housed.

For electrothermal furnace 20, as making of stainless steel, leave at framework 21 places space 23 '; As making body of heater, one group of electrode to be installed at least in body of heater then with refractory brick.As one group of electrode 22,22 ', fill resistance electric heating element 24 between this electrode, as the plain particle of charcoal, electrode 22 and 22 ' between be provided with current control loop 25, during energising, the just heating of interelectrode electric heating element 24, the internal resistance of the plain particle 24 of charcoal descends, so bigger current flowing is arranged, can produce a large amount of Joule heats like this.

Also have in above-mentioned space 23 ' locate with heat resisting brick framework 21 is airtight.The outside of above-mentioned framework 21 is provided with stay pipe 40,40 ' except that the four sides has the contact-making surface, be connected with the electrothermal tube 31 of tubulose plural number.For example with the framework perpendicular parallel welding in outside.Above-mentioned framework 21 and above-mentioned electrothermal tube 31 just can constitute heat release structure 30, and the heat in the body of heater is carried out heat release in liquid like this.Be equipped with in the both sides of above-mentioned electrothermal furnace portion 20 stainless

steel stay pipe

40 and 40 '.This two stay pipe 40,40 ' be the sidewall of once through boiler 10, stretch outside and the outer wall of sodium heat size device 10 install stay pipe 41 and 41 '.

In above-mentioned stay pipe 41 and 41 ' middle insertion and be fixed with insulated conduit, as ceramic conduit 50 and 50 ', and the other end of ceramic conduit should be connected on perforation the

electrode

22,22 of body of heater 23 ' the place, side.Above-mentioned ceramic conduit 50,50 ' an end separately with electrode 22 and 22 ' an end link to each other, the other end then with the lead 51,55 of current control loop 25 ' link to each other, ceramic conduit 50,55 ' in stay suitable gap, with lead 51,51 ' the position be located at ceramic support sheet 52 places.

Fig. 2 is near the sketches electrothermal furnace 20 sides, wherein electrode 22 and 22 ' as 2 graphite cakes 221,221 ' coincideing mutually forms, this two graphite cake facing to central part form respectively concave shaped portion 222,222 '.

The space that the plain particle 24 of above-mentioned charcoal is housed in the graphite cake 221 of above-mentioned inboard is connected with the passage 223 of above-mentioned concave shaped portion 222, the while the graphite cake 221 in the outside ' in above-mentioned concave shaped portion 222 ' with above-mentioned earthenware 50 and 50 ' the passage 223 ' be connected of inside.

The stretch concave shaped portion 222 of electrode 22 ' locate of the top of the screw thread that above-mentioned lead 51 is formed, and packing ring and nut are installed at tip position.

Each body 40, the 40 ' top that stretches in the outside of above-mentioned boiler vessel 10 be provided with breather chamber 60,60 ', this breather chamber 60,60 ' above do not have safety valve 61,61 '.

The outside of above-mentioned boiler vessel 10 be provided with 2 breather chamber 60,60 ' between be provided with inert gas circulating pump 70, inert gas such as nitrogen or argon gas are circulated, circulating pump 70 and breather chamber 60,60 ' circulation pump line 71 be connected.

Therefore, when starting circulating pump 70, the breather chamber 60 on inert gas right side from figure ', by earthenware 50 ' with above-mentioned electrode 22 ' passage 23 together arrive the inside of electrothermal furnace.Subsequently, from the breather chamber 60 of electrode 22 on the left of earthenware 50 arrives the figure of opposite side, then return and follow pump 70 by circulating pump 71.Like this, for a long time to inert gases such as the delivered inside nitrogen of electric heating element 24 or argon gas, can stop the oxidation reaction of electric heating element.Therefore, can prolong the service life of electric heating element.The circulation of inert gas like this, also available following method replace promptly with pump inert gas from breather chamber 60 on one side ' to electrothermal furnace 20 inputs, simultaneously at another side with breather chamber 60 to outside exhaust.

Embodiment 1, please see the 1st figure, this device is made up of following each several part: on the vent line that will stretch from the outside of above-mentioned electric heating portion 20 and above-mentioned boiler vessel 10, above-mentioned electrode 22,22 ' passage 223 and the space in the concave shaped portion 222, be equipped with above-mentioned earthenware 50,50 ' and above-mentioned breather chamber 60,60 ' and safety valve 60,61 ' form.

During the electrothermal furnace 20 of above-mentioned composition, above-mentioned electrode 22,22 ' employing molybdenum replaces graphite better, and the insulating materials of above-mentioned again body of heater 23 is as using ceramic materials such as aluminium oxide or silica better.

Embodiment 2, as shown in Figure 3, above-mentioned electric calorifie installation 20, for example with the hexagonal column framework 21 of steel ' have passage 26 to connect, this framework 21 ' in airtight, for example with the hexagonal column framework 21 of steel ' have passage to connect, this framework 21 ' in want that airtight for example to make body of heater 23 with refractory brick airtight.Simultaneously be furnished with 1 group of electrode at least in this body of heater, for example three-

phase electrode

22,22 ', 22 ", and fill electric heating element betwixt, for example the plain particle 24 of charcoal.Above-mentioned electrode 22 ', 22 " between by power control loop 25, make current flowing.

This structure can make by through hole 26 and make liquid communication, and heat exchange is good.Also have above-mentioned framework 21 ' be the garden tubular, this framework 21 ' have through hole 26 to connect also can obtain effect same, in the case, make the heating means and also electric hot plate or electrothermal tube can be connected with electrothermal furnace.

Embodiment 3, as shown in Figure 4, four jiaos of jar shapes of the top formation of above-mentioned framework 21 also cut away its top by horizontal direction, cut away the interruption-forming screw socket at this, with lid 21 " airtight, on the one side of above-mentioned four jiaos of jar sides, be provided with the observation window that can observe electric heating element 24 oxidation situations.Observation window stretches outside boiler vessel 10 laterals, presses transparent material in the observation window peace, just as heat resistant glass 28 and Sealed Observation Window.

Embodiment 4, as shown in Figure 5, are provided with through hole 32 at the sidewall of above-mentioned electrothermal tube 31, also are good.

The advantage that boiler of the present invention has is except the very fast heating of the liquid of container, particularly water being improved outside the temperature, can also producing steam.

The overall efficiency of above-mentioned boilers heated electrically can be calculated from experimental data:

Overall efficiency=output energy+insulation material institute energy requirement/input energy=0.933 is that efficient surpasses similar boiler.

Claims

1, a kind of boilers heated electrically, it is made up of boiler vessel and electrothermal furnace, electrothermal furnace (20) is equipped with in the inside that it is characterized in that boiler vessel (10), one group of electrode (22) is housed in the electrothermal furnace (20) at least, be filled with resistance electric heating element (24) between electrode (22), the breather line (50) that connection is arranged in the outside of the inside of electrothermal furnace (20) and boiler vessel (10), (50 ').