LU82174A1 - METHOD AND DEVICE FOR ADJUSTING THE HOT WIND TEMPERATURE IN A HOT WIND PRODUCTION INSTALLATION - Google Patents

Description

, -η BL-2803 / EM / BM

1 patent application

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. 15. February 1980 Designation of the Inventor f (*) The undersigned ................................. MEYERS. ... Ebnest, ... Ing, cons, in ... pj: .opr .. ind., .., ...............

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.................................................. ....................... 4.6 ....... r.ue ... du..Cimet.ier.ef ... Luxemfcouj: g ....................................

acting as 3 & 2i8jSâëâït & - as agent for the depositor - (2) ..................................... ........................... RAUL .... WURTH. .ELA ................................................ ...............................................

.................................................. ....................... 32 ....... xue d'Alsace, -. Luxembourg .......... .......................................

(3) of the invention concerning: _____________ "Process. And .... di.spos.i.tif ... de .... r.é.glage ... de .la .... tempér. at.ure .... du ...? vr.ent.

.............. hot .... in .... a LET ... installation .... of ... production ~ âe .... Fri.t. ~ hot "............

designated as inventor (s): 4. ME Surname and first names ......................... SPEDENER.Xarlo ________

Address .............................................. If - Belt -des Rosiers> ........ Howald ...................................

2. Surname and first names ............................................. .................................................. .................................................. ......................

Address ................................................. .................................................. .................................................. .......................................

3. Surname and first names ............................................. .................................................. .................................................. ...................

Address ................................................. ............................. ..................... .................................................. .................................

He affirms the sincerity of the aforementioned indications and declares to assume full responsibility for them.

............... Luxerobourg .................., on ........... 2.4. .March .19.80-- A 680 26___________ (1) Last name, first names, firm, address.

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/ - BL-2803 / EM / BM

. / patented * tr * j February 15, 19.80 ψ Designation of the Inventor (1) The undersigned MEYERS Ernest, Ing. cons. in own. ind. , ................................................. ............... 4.6. .street.of ... Cemetery., ..Luxembourg ..................................... ..

acting as agent - agent of the depositor - (s) ..................................... .................. EÄUL ... WURTH .... S ... Ä. ".............. .. .................................................. .........

.................................................. ........ 32 ....... r.ue ... jd .. '. Alsace., ....... Luxembourg ............ .........................................

(3) of the invention relating to: ......... "Method., And .... device .... of ... adjustment .... of .... the ... temperature ... of ... wind ..

.......... hot in ... a., installation ... of production of ... yent ... hot ”.............

designated as inventor (s): 1. Name and first names ................ LEGILLE Edouard .................... ........ ......................... ................

Address .................................... 1.6 6 ... rue de..Trêves, .. ..... Luxembourg. ........................

2. Name and first names ................. S.OLVI Marc ........................ ...................... ............................ .................

Address ...................................... 3.0 rue. Char les-Quint, Luxembourg ....................................

3. Name and first names ............... SC.HMIT. ..Louis ............................................... .................................................. .............

Address ...................................... 3.9 .... .r.ue .. ..Thé.o.dor.e ... Eber.hardt., ........ Luxembourg ...................

He affirms the sincerity of the aforementioned indications and declares to assume full responsibility for them.

..... ............................................. ... , the 19.....

IUKEI® & ÎGÎ3 h SERVICE ILPKÖiRitTt Ih'Liii’E

Received \ JkïJLL * Û .---- h - ^ - aii, k ^ · c / "- .....................

__- / (signature) A 6Sj? d ^ (3) Last name, first names, company, address.

8n. . BL-Z801 / BVM

—J? —Ί- ~ i — 2 l GRAND-DUCHY OF LUXEMBOURG

Patent N "----------------------------------------------- ---- of _______ Mr. Minister,, GnSptotf of the National Economy and the Middle Classes

Title delivers i ......._________......_____...._____ Yo * .......... ç & jÆg Industrial Property Service

LUXEMBOURG

Patent Application I. Application

The company known as PAUL WURTS S.A.j 32 seen from Alsace, Luxembourg represented by Ht.Meyers À É. Frey ïinger, Ing.oons. in own. irid *, 46 rue du Cimetière, Luxembourg, acting as agents * ïrZT I fifteen February nineteen hundred and qua ^ e vÎ ^^ at .................... ............ hours, at the Ministry of National Economy and the Middle Classes, in Luxembourg: 1. this request for obtaining a patent for an invention concerning: "Process and device for adjusting the temperature of the hot wind in a ^ hot wind production installation ”declares, assuming responsibility for this declaration, that the inventor (s) is (are): ...... .................................................. .................................................. .................................................. .................................................. .................................................. .......... (5) 2. the delegation of power, dated ______________________________ on .................

3. description in language ............................................ ...... of the invention in two copies; 4 ................................. drawing boards, in two copies; 5. the receipt of the fees paid to the Luxembourg Registration Office, the nine glover one thousand nine hundred and eighty claims for the above patent application the priority of one (s) request (s) from (6) ... .................................................. ........................................... filed in (7 ) ................................................. .................................................. ...................................

the ........................................"........ .................................................. .................................................. .................................................. .................................................. ..... (8)> - * on behalf of .................................... .................................................. .................................................. .................................................. .................................................. ........ (9) elects domicile. For him / her and, if appointed, for his or her representative, in Luxembourg .................... ....................

46 rue du Cimetière, Luxembourg ^ 0) requests the issuance of a patent for the object described and represented in the abovementioned appendices, - with postponement of this issuance to ________________________________________________ month.

, 'one of the agents

On ............ d .................................... .....................................

........ ^ 'J Π. Deposit Minutes

The aforementioned patent application has been filed with the Ministry of National Economy and the Middle Classes, Industrial Property Service in Luxembourg, on: February 1, 1980 is00 Pr. The Minister at ...... .......................... hours of the National Economy and the Middle Classes; P- d.

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| A 68007 ......... "i BL-2803 / EM / B!

PATENT

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Method and device for adjusting the temperature of the hot wind in a hot wind production installation! The so-called company:: PAUL WURTH S.A.

32 rue d'Alsace Luxembourg ^ J-; f · • - 1 -

The present invention relates to a method and a device for adjusting the temperature of the hot wind in a hot wind production installation with at least one pair of cowpers, each cowper comprising, inter alia, a beehive well occupied essentially by a stack of refractory bricks and provided at its base with a cold wind inlet and an outlet for combustion fumes, and a hot wind outlet located at the top of the well, and a or several burners • 10 mounted, either above the refractory burner, or in a combustion well and a device for monitoring the temperature of the hot wind produced by the installation, this method comprising a combustion period consisting of burning in each from the burners a combustible gas with a view to heating the ruchage well and a wind period consisting in admitting cold wind at the base of the ruchage well and in extracting from the upper part of the pu its the warm wind 't1 having recovered during the crossing of the beehive the heat stored in it during the combustion period-tion 20 tion and in which we mix with the warm wind a certain amount of cold air, this quantity being adjusted accordingly

Ide the temperature detected by the temperature monitoring device so that it remains constantly equal to a predetermined temperature.

25 It is known that in the case of a blast furnace, for example, the hot wind is brought in a circular pipe supplying the individual nozzles through which the hot wind is injected into the oven for the maintenance of the process inside of it. In order to ensure perfect control of the operation of the oven, it is necessary that the temperature of the hot wind be constant or, at least, that it be controllable. However, the hot wind produced in such a cowpers installation does not have a temperature which remains constant throughout the wind period. In addition, it is possible that there is a temperature difference N between the hot wind produced in one of the cowpers and that | product in another. In view of the removal of these fluc-! /, temperature kills of the hot wind, it is planned in 1 the current installations, a mixing station upstream - 2 - of the circular pipe and downstream of the cowpers. In this mixing station, the quantity of cold air necessary to maintain the temperature, at the level of the circular duct, at a constant value, called the set temperature of the hot wind, is added to the hot wind. If you want to obtain a set temperature of the hot wind, for example, 1250 ° C, which is the case for modern blast furnaces, it is necessary that the temperature of the refractory ruching, at least in the upper part, be raised at 1400 ° C.

The object of the present invention is to provide a new mixing process which allows a significant simplification of the installation for producing hot wind. To this end, the method according to the invention is characterized in that the mixing is carried out inside the enclosure of the cow-per. This allows the deletion of the entire mixing station.

In an advantageous embodiment, the mixing is carried out immediately above the refractory ruching and the mixing wind is introduced through the burners, this both in the case where the burners are arranged in a combustion shaft as in the case where the burners are arranged in the vault of the cowper immediately above the beehive. The mixing wind will preferably be made up of part of the cold wind, by taking from the main cold-air intake pipe the quantity necessary for mixing.

The installation for implementing the method is essentially characterized by an auxiliary pipe connecting at least one of the burners to a main pipe 30 for cold wind intake at the base of the ruchage well and by an adjustment valve in this pipe auxiliary, the position of this valve being automatically controlled according to the temperature monitoring device.

Other particularities and characteristics ressor-35 derive from the description of an example of implementation with reference to an embodiment presented below, by way of illustration, and with reference to the appended figure.

I This figure shows an example of a cowper without a combustion well with burners in the dome, of the kind described "jT7 - 3 - in the Luxembourg patent application entitled:" Installation of hot wind production and process used '' filed on the same day as the present application, it should be noted, however, that the invention is not limited to this specific exercise.

: The cowper represented in the figure and designated, as a whole, by the reference 2, essentially comprises a beehive well 4 surmounted by a chamber 6 and separated from! this by a transverse slab 8 of refractory material, i 10 This slab supports several, in the example shown, | four burners 10 located inside the chamber 6.

; * $ i The burners 10 are supplied with combustible gas by an external circular pipe j and with combustion air by a central pipe 14 connected radially to each of the burners.

I The figure also shows a main pipe 16 bringing the cold wind to the base of the cowper. This line communicates with the ruchage well 4 through a main valve! pipe 18 and an auxiliary valve 20. The hot wind leaves the ruchage well 20 through a lateral opening 22 which can be connected to the circular hot wind pipe of a blast furnace.

In the embodiment shown in the figure, a cooling and pressurization system for the chamber 6 is also adopted, similar to the example illustrated by FIG. 6 of the aforementioned patent application. For this purpose, we first put the combustion air line 14 in I '! j communication with the interior of the chamber 6 through a set of valves 24. An additional set of valves 26 regulates the passage between the line 14 and each of the burners 10.

The circulation in the chamber 6 is ensured by evacuating the air through a pipe 28, either towards the atmosphere, or towards the base of the ruchage well 4 for recycling with the cold wind. During the combustion period, therefore, combustion air is circulated not only in the burners, but also around them and inside the chamber 6 for cooling purposes.

In order to pressurize the chamber 6, and to cool it during the wind period, an auxiliary pipe 30 of cold wind is provided, connecting the main pipe 16 through the valves 18 and 20 to the line 14 for supplying the burners 10 with combustion air. This pipe 30 also includes an adjustment valve 32 for determining the flow rate in the pipe 30. For more details concerning the operation, in particular the cooling and the pressurization, reference will be made to the aforementioned patent application.

In accordance with the present invention, mixing is carried out between the hot wind and a certain amount of? cold mixing wind, in order to obtain a set temperature of the hot wind, inside the enclosure of the cowper 2 and, in the particular case of the figure, in a chamber 34 formed between the upper surface of the well ruchage 4 and 15 the lower surface of the slab 8 supporting the burners. In this particular case, it is possible to take advantage of the presence of the pipe 30 to bring a determined quantity of cold wind through the pipe 14 and the burners 10 into the chamber 34. Consequently, the air for cooling as well of the chamber 6 that the pressurization air of this chamber 6 and the mixing wind consist of a certain amount of cold wind derived from the main pipe 16.

The adjustment of the total amount required for cooling, pressurization and mixing is effected. killed by the valve 32. The proportion between the mixing wind, on the one hand, and the cooling air and the equalizing air, on the other hand, is achieved by means of the two sets of valves 24 and 26 If, for example, the device (not shown) for monitoring the temperature of the hot wind in the circular duct detects an upward trend in the temperature of the hot wind, the amount of mixing wind will have to be increased to bring the temperature down. desired level. To this end, the valve 32 and the valves 26 will be opened.

35 Independently of this, the valve 24 can also be actuated in order to satisfy the cooling needs of the chamber 6.

j On the other hand, if the device for monitoring the temperature of the hot wind detects a downward trend - 5 - k in the set temperature of the hot wind, it would suffice to close the valve 32 to reduce the flow rate in the line 30 and, at the same time, the amount of mixing wind. If at the same time as a decrease in the mixing wind, it is necessary to have an increase in the cooling air to ensure the cooling of the chamber 6, it is possible to open more the valves 24 and to further close the valves 26 without changing the position of the valve 32.

It is understood that the maneuvers of the valves 10 are carried out automatically as a function of the indications provided by the device for monitoring the temperature of the hot wind to the circular duct on the one hand, and another device for monitoring the temperature in the chamber 6, on the other hand.

In the case of a conventional cowper with a combustion shaft, whether separate or incorporated, it is also possible to introduce the mixing wind through the burner (s) by connecting them through an auxiliary pipe similar to line 30, on the main cold air intake pipe. It is however obvious that the system proposed by the invention is particularly advantageous in the case of the embodiment shown in the figure or in the case of the other embodiments proposed in the aforementioned patent application, since advantage is taken of 25 the presence of the cooling circuits and that one can * combine the mixing operation and the cooling operation. In other words, a hot wind is obtained at a controlled temperature, without the need for a mixing station and without being obliged to have recourse to additional equipment.

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Claims (6)

1. A method of adjusting the temperature of the hot wind in a installation for producing a hot wind with at least a couple of cowpers, each cowper comprising, inter alia, a beehive well occupied essentially by stacking. refractory bricks and provided at its base with a cold wind inlet orifice and an outlet for combustion fumes, and a hot wind outlet orifice situated at the top of the well, and one or more burners mounted, either above the refractory burner, or in a combustion well and a device for monitoring the temperature of the hot wind produced by the installation, this method comprising a combustion period consisting of burning in each from the burners a combustible gas with a view to heating the ruchage well and a period of wind consisting in admitting cold wind at the base of the ruchage well and in extracting from the upper part of the well the hot wind which has recovered during the crossing from the ruching the heat stored in it during the combustion period and in which a certain amount of cold mixing wind is mixed with the hot wind, this quantity being adjusted as a function of the temperature detected e by the temperature monitoring device so that the temperature remains constant. equal to a predetermined temperature, characterized in that the mixing is carried out inside the enclosure of the cowper. 2. Method according to claim 1, characterized in that the mixing is carried out immediately above the refractory ruching. 3. Method according to any one of claims 1 or 2, characterized in that the mixing wind is introduced through the burner or burners. 35 4. - Method according to any one of claims 1 to 3, characterized in that the mixing wind consists of part of the cold wind which is derived from a con! main cold air intake pipe at the base of the frosting well. * · Ι ii '- 7 - i 5. - Device for implementing the method according to any one of claims 1 to 4, characterized by an auxiliary line (30) connecting at least one of the burners (10) to a main pipe (16) for cold wind intake 5 at the base of the ruchage well (4) and by an adjustment valve (32) provided in this auxiliary pipe (30) the position of this valve being automatically controlled according to the temperature monitoring device. 6. Device according to claim 5, characterized 10 in that the auxiliary pipe (30) is connected to the burners e (10) through a pipe (14) of combustion air intake in which are provided valves adjustment (26). 7. Device according to any one of claims 5 or 6, characterized in that the burners (10) are mounted on a transverse slab (8) above the ruchage well (4) and in that mixing is carried out in a mixing chamber (34) defined between the slab (8) and the upper surface of the ruchage (4). 8. Device according to claim 7, characterized in that the auxiliary pipe (30) consists of the pipe by which cold wind is supplied as cooling and pressurizing air in the upper part ii of the cowper above the slab (8). i; to IH îi