US1609363A - Boiler plant - Google Patents

Description

Patented Dec. 7, 1926. l Y.

stica i MAX KEL'TING, or nostrani, enaIirAnY.

Animation' heengaan-1924; sensi No. 730,653, and in Germany' Magen- 5, 1924;

My invention refers to' boiler plants and its object is to provide means whereby the utilization of heat iii boiler plantswis mcreased andi rendered more' efficient than has hitherto been possible. Y

In boiler plants comprising means for heating the boiler with gaseous, liquidV or solid finely subdivided fuel, such as pul- Ver'ized coal, the'4 heat energy of tlie fuel has been stored in periods of lower steaml consumption by hea'tinga heat storage such as Cowpers Vstove in ,orderto' be able during periods of higher steam consumption to preheat the air of combustion by causing it to pass through the.' heat storage'. In` boiler plants-heated withcoke'v oven* gas or blast furnace gas the` contn-i'ially flowing current ofv gas canfbe consumed in' spiteT of the/noir uniform steam consumption, the provision of gas tank-'s being thereby avoided. But a'lls2 in boiler plants heated with' other kinds of fuel the storing of the heat has proved useful inasmuch' asby preheatinfgthe air of combustionthe steani production canz be increased 50% or more without the volume of fitte' gas bec'oming larger and? without the temperature of the' waste gases being raised, the heated air of combustion not only increasing the heat' supply, but also the useful drop in temperature and in consequence thereof also the steam production. In the boiler plant according to the present invention the boiler is combined with the heat storage in such manner that the gases of combustion issuing from the burner, which is common to both parts of the combination, can be distributed according to requirements. It is thus possibleto supply'only so much heat to the boiler as corresponds to the heat consumption for the time being, the steam in excess being led into the heat storage. If the steam consumption rises, a simple reversal will cause the air of combustion to pass through the heat storage, taking up the heat stored therein so that in this manner the excess heat resulting from a former operation is led back below the boiler. In consequence thereof the supply of fuel and air need be regulated only at larger intervals, if it is found that the heat storage receives too much or too little heat. VIn gas heated furnaces or in furnaces provided with a burner fed with oil 0r pulverl ized coal by means of an air or steam jet the ener jy of flow of the jet can be utilized for simp ifying the reversal or regulation.

Referrin'gto thedrawings, a isv the upper drunr and b arethev tubes of a water tube boiler, which' are heatedy bythe re gases in the usua-lmanner, the gases of combusn tion escaping through` the main iiue c. ef is a burner suppliedv with gas, oi-l or pulverizecl fuel from amain cl. InI periods of low steam consumption, fory i instance inz `the .intervals between twohoisting operations in a mine, the burner aspirescol-dair fromwithout through the fresh air cond-uit. f and. carries it along Ythrough the mixing nozzle gl into the combustion vchamber li'. Underneath this chamberthe hea-t storage z' is mounted com; prising a refractory checker work o-fvsome well known kind. r: is an opening in the bottom of theA combustion chamber forming connection between tliisch'aniber *and the heat storage, whereby. part off the fire gases is drawn through theuhea't Storage z', giving off its heat energy and esca'pi-ng-throughi the conduit Z into the main flue c provi-ded that' they reversibleiiap m assu-mes the position shownl in' Fig. l. l

If theheat'storage isv heated up "in this manner and if the steamb consumption increases', the` reversible fla-p: is shifted into the position shown in Fig. 2. Inasmuch as this operation takes place at the cooler end of the heat storage, no diiiiculties are encountered, inasmuch as no parts need be operated which are exposed to greater heat. With the reversible flap m in the position shown in Fig` 2, the sucking action of burner e will now cause fresh air from with-v out to be drawn in through the conduits n and Z, this air being compelled to travel across the heat storage i before entering the way of the conduit 7. In consequence thereof the reversible flap m also provides for a suitable mixing of cold and hot air. If the reversible flap m is placed in an intermediate position, the heat storageor generator i is thrown out of action not only as a heat storage, but also as air heater. This position is imparted to the reversible flap during periods of average steam consumption where the consumption of steam corresponds to the normal quantity of fuel consumed in the furnace, if this latter is supplied with cold air from without.

A boiler plant combined with a heat storage as shown and described can be operated in the simplest manner and even more easii ly than an ordinary boiler. Vxith a uniform supply of fuel the attendant need merely adjust the reversible flap in -correspondence to the variations of steam pressure, a fresh regulation of the burner becoming necessary only when greater diiferences arise between the heat energy to be distributed on the boiler and the heat storage on the one hand, and steam consumption on the other hand. Obviously the operation of the reversible 'Hap can also be effected by any of the well known automatic devices, for instance from a piston acted upon by the steam pressure in the boiler. u

I wish it to be understood that I do not desire to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the a-rt.

I claim:-

1. Boiler plant comprising a boiler, a Source of hot gases, a heat storage and means whereby Veither said hot gases are made to flow partly in contact with said boiler and partly through said heat storage or fresh air is drawn through said heat storage and caused( to mix with said hot gases.

Boiler plant comprising a boiler, a burner, a heat storageand means whereby the hot gases emanating from said burner arefmade to flow partly in contact with said boiler and partly through said heat storage or fresh air is drawn through said heat storage and caused to mix with said hot gases.

3. Boiler plant comprising a boiler, a heat f, storage, a fresh air conduit leading below said boiler and to said heat storage, a burner projecting into said conduit, a main `flue and reversing means whereby either the hot gases emanating from said burner are made to flow partly in Contact with said boiler and partly through said heat storage or fresh air is drawn through said Vheat storage in opposite direction and caused to mia with said hot gases.

Il. Boiler plant comprising a boiler, a heat storage, and a direct connection between said heat storage and the lower side of said burner, a fresh air conduit leading below said boiler and to said heat storage, a burner projecting into said conduit, a main iiue and reversing means whereby either the hot gases emanating from said burner are made to flow partly in contact with said boiler and partly through said heat storage or fresh air is drawn through said heat storage in opposite direction and caused to mix with said hot gases. Y

In testimony whereof I affix my signature.

MAX KELTING.

Images