IT201700007552A1 - An innovative paper drying plant with turbine for the production of the drying air flow - Google Patents

Description

AN INNO / ATIVE PAPER DRYING PLANT WITH

TURBINE FOR THE PRODUCTION OF THE AIR FLOW OF

DRYING

Arrbi to del I <"> i nvenzi on

This invention relates to the tech nical sector of the antifills for the production of paper.

More in particular, the invention refers to an innovative i nnovative the filling of the paper which turns out to be part of the ar ment and functi onal, by carrying out a they ccazi one effective, and being ul t er i or ment it is structured in such a way as to allow its self-control at least in part and through an ener gy recovery.

Brief notes on the technical note

The production cycle of your paper is well known from time to time.

The production passes from I <"> to obtain the l a l ul ose that <■> of vegetal origin, to esenrpi or cortecci di al beri. The cell is then mixed with the n a water bath is treated in a process of processing according to the well-known phases in such a way as to obtain the final paper tape which is then wound in the reels, in turn destined for anti-industrial fillings that transform them into well-known products to be put on the market, for example toilet paper, tablecloths or paper for notebooks, etc.

A critical phase of the production of the paper concerns the correct drying of the web in such a way as to eliminate the excess water present in the mix and obtain the finished product.

At the current state of the technology, the drying takes place through methane burners which, through the corrbust i on, produce a fl ow of hot air which is initiated in the l a drying section for the hood arrester; at the same time, high-pressure steam is injected into the inside of a roller coaster <'> rronol uci do_ which is used to dry the inside of the belt. The steam used is generally produced by a tradi onal and methane heat. The two current heat fl ows are therefore generated by pending earthworks with different control and safety earthworks.

The errors in the atmosphere of the neighbors here are the sound of both and corrosion, consequently also the effi ciency of the system is reduced and is often discharged in a warmer atmosphere than to th e need <”> for r egol at i on.

In a real and practical example, it is possible that today 85 tons / day of toilet paper are produced with the following respectively:

600 SrrC of GAS at I <"> I nterno of I and hoods;

- 3 00 Sm of GAS at l <'> inside of the heat for the production of saturated steam from in on to the rronol uci do

2, 5 rrwH of elec tric energy for the movement of the micchi na and the related ari ses which, in order to be produced, also requires a correction by the manufacturer (ENEL).

The remedies are therefore in tune and evidently in accordance with the technical note I <"> the filling of them is not sol or ary par t i with the arrrent and corrpl it ira, moreover, <■> par t i col arrrent e i nqui nante ri chi ed, moreover, a consumption of energy for its operation and avoided.

It is the thesis of the I <"> invention

The purpose of the present invention is to provide an innova tive coating for the paper which solves the aforementioned technical inconveniences.

In par ticular <■> purpose of this I nvenzi on to provide an effective and efficient filling, allowing the counter to reduce the operating costs and the I <"> or product.

It is therefore the purpose of the present invention to provide an i np anto which, at the occurrence, also allows an eventual production of energy to which it can contribute in part to its al i mentation. one, for which allowing a further r i s par ni o ener get i co.

These and other objects are therefore achieved with an end 1, in accordance with the claim 1.

This is the case (1) for the dryness of a ribbon or sheet or paper includes:

A path (19) of passages or of the paper and one or more paths (14, 16) through which a gaseous fl ow (air and / or other gases) can be mixed to carry out (<"> the card during its transit along said path;

A device (2, 3, 4) adapted to generate said gaseous drying fl ow;

In accordance with the invention this is a device suitable for generating the fl ow <■> a turbine (2, 3, 4).

Preferably, the hot ropes deriving from the corrosion chamber of the turret are taken out and used.

In this way, all the aforementioned technical inconveniences are easily solved.

The gaseous fl ow (for example or the exhaust gases as mentioned above) generated with the turbine is effective for drying the paper.

For example, or in the case of the turbo corrbus on chamber, a fl ow at terrperatures of about 600 ° C or a little less is produced.

The use of a turbine instead of the methane burners allows to reduce the consumption as much as <■> possible and to be able to connect to the l <'> to the rotating shaft of the turbine. a generator that produces current and therefore, at least in part, can power the turbine itself.

This architecture, therefore, makes it possible to reduce the number of consumers and therefore also the influencing agents.

For example, as the product is known in the art, the energy consumption values with the tradi tional systems are as follows:

600 SrrC of GAS at I <"> I nterno of I and hoods

300 Sire of GAS at the l <'> inside of the heat for the production of saturated steam to be sent to the monobloc

- 2, 5 rrwH of elec tric energy for the movement of the micchi na and of the related ari ons which in order to be produced also requires a corrbustion by the manufacturer ( IS IN THE) .

With the innovative system, in accordance with the invention, we will instead have:

800 SrrC of GAS consumed by the turbogas which will produce <”> yes to the external energy required by the 1 and hoods yes to that request to produce steam;

1, 7 nrvvH of elec tric energy for the movement of the micchi na and the related aids, the remaining 0.5 rrv \ Ji will be acquired by Enel.

Advantageously, the filling, as described in the following, lends itself well to integrating other energy recovery apparatuses which in the corrpl it will regulate their performance, such as for example or a steam generator directly or indirectly connected to the turbine and therefore able to function and produce steam by exploiting the hot cables produced by these latest products.

For example, the steam generator (which draws water that is heated to generate steam) can be connected to an accumulator which serves to regulate the drainage ropes or the fluxes of gas or air in general produced by the turbi na. In this way the excess heat ropes not used for drying can be used to produce steam, which in turn is used for drying.

For example, I <"> the so structured cover can include a steam generator (8) in fl u from conuni cation with a tank or collection (6, 7) of the gases or ropes produced by the turbo and / or with the cooling device over which the paper tape is passed, which is invested by the fl ow, in such a way as to generate steam through the fl owes left by the cooling or that l i nute l i products and products from l a t ur bi na.

This steam can then be fed to the roll of passages or of the paper (called nonol uci do) to facilitate the drying of the side of the paper web opposite to that covered by the fl ow of air.

Also described here is a method for drying a web or sheet or paper comprising the following steps:

Prediction of a path (19) of passages or of the paper and of one or more ducts (14, 16) through which a gaseous fl ow can be brought together in order to dry the the card during its transit along said path;

Preparation of a device (2, 3, 4) adapted to generate said drying fl ow;

And in which the method provides for the passage of either the tape or sheet or the length of said path and the contextual production of the gaseous drying fl ow with which it is invested to operate its drying, called production of the drying fl ow. the nozzle being obtained through a turbine (2, 3, 4), the n parts of the corrbustion chamber (3) of the turbine placed in the n fl ui n flow from with said ducts (14, 16) in such a way and to be able to make the unloading ropes converge towards the path of passages o (19) in order to operate the drying.

Further advantages are derived from the resale of pendants.

Brief description of the signs

Further char acteristic and advantages of the present ti anto 1, according to I <"> the invention, will be more evident with the following description of some real i zzat i ve forms, made by f i cat i ve and non i rritative title, with reference to the related signs, in which:

Figure 1 depicts scherrat i cament and an agra ima of an i nrp anto i n according to the I <“> innovation;

Figure 2 shows a screen cament and a turbine used for the card's ccati on;

- Figure 3 shows the screen and a drying section of the paper;

Figure 4 is a more correct back taking the back of figure 1.

DESCRIPTION OF SOME PREFERRED EMBODIMENTS FIGURE 1 is our schematic cament and a part 1 of them ccatio of the paper in accordance with the present invention.

It includes:

A turbine (2, 3, 4) of the OP16 OPRA Turbogas l a ti pol ogi (which acts as a ternric and elec tric generator);

A Pl enum or pri rio accurrul o, 6 which gestures the heat produced by the turbine;

- A Mxer, or according to accurrul o, 7 which chooses no I <"> ari a cal from extracted from the first part of the hoods 12 belonging to the part 10 of them ccati on of the l a paper assists to that l a produced by the l a turbogas that does not it is consumed by the hood itself;

A recovery Cal from a 8, with or without auxiliary burner, (cal from which acquires the fl ow of thermal energy coming from ni xer 7) and which is used to produce useful steam. once for the production of a hot fl ow which contributes to the drying of the paper;

A Chi I I er System (a system that converts the thermal energy from hot to cold so as to cool the air in the turbine to increase its performance in the season summer). This system is well known per se and is not a specific object of this invention. Therefore, there is no further detail here and an i ndi cation of how it can be structured <■> for example or on the Internet at the I <"> i ndi r i nd:

ht t ps: / / i t. wi ki pedi a. or g / vu ki / Chi I I e r _ (r ef r i ger at or e) As therefore shown by the first figure 1 and even better in the second axonometric view of figure 2, <■> first a turbine was adopted to generate the necessary hot air fl ow or drying.

The turbine has a corrpressor 2 and a corrosive chamber 3. The air fl ow is therefore corrected and then, after corrbusting, it is made to expand in part 4 in the various stages of the turbine, causing The rotation of a revolving axis runs from known art.

In accordance with the invention, a turbine is therefore used to generate the drying fl ow.

In fact, the hot ropes of the corrbusti on are proper or those that are re neded, which runs in the following and clearly runs from the graph, towards the drying device and which represent the air fl ow. cal from.

The use of the turbine means that its rotation of its axis can be exploited in turn to generate current through a generator (the generator 5 in figure 1) which is powered by i n part of the turbo itself. The rotation of the turbine, furthermore, starts the corrpressor allowing the process to operate in its corrpl it, that is to say, stages or corrections, corrosion and expansion with consequent rotation of the turbine.

This type of sol uzi on, as therefore already <”> here highlighted, allows a notable energy reduction with respect to the known art.

Figure 2 shows the turbogas apparatus used and preferred for the present invention. It <■> a turbogas apparatus powered by natural gas and model OPRA OP-16 with electrical power of 1730kV \ èl and electrical efficiency of 23.7%

In order to ensure that the system is efficient and economical, it is necessary to install a turbine which is 100% integrated and which does not have an excess of unexploited energy.

This type of Turbogas, one of a kind <■> perfectly corrpl ement ar e to th e re queries este e energeti che del l a miechi na. Suffice it to say that the total it <”> earth and electricity produced by it are exploited without any waste; at the same time it does not require large acts of nranutenz i on and has a level of noxious errors in the atmosphere much lower than its current condition.

The fl ow of hot air (the unloading ropes) produced through this turbine is sent to the drying device 10.

As shown in the drawing of figure 1, the interposed between the turbine and the drying device is preferably provided with a sort of reservoir or collection 6 for the hot fl ow, denoted <'> Pl enum ., is made up of a ca verti ca verti ca verte structure of steel or salt, which is then connected with the drying device through a special conduit of passages or the I <"> hot air.

The direction of arrows a serves to identify the path of fluid connection between the reservoirs or collection tanks 6 with the sine-hood 11 of the drying system 10.

The system of accurrul o 6, which turns out to be the heart of the I <"> i rrpi ant o, regulates the i l bal l anci o of the I <"> energi a terni ca i nvi e l a t <"> ri chi it is from the l a miechi na to the l <'> the inside of the hoods and the reuniting at the l <'> i nternal of the second accurrul o 7 which serves to produce steam at the l <'> the inside of the heat from a to recovery placed at the end of us cl o.

For this purpose, suction means are provided, for example or an aspirator, preferably of the centrifugal type, which are activated in order to spin the I <"> air from I <" > accurrul o 6 towards the drying zone.

Such means of aspiration, in particular the aspirator, are not represented in the figure only or by lockpl i ci t <”> description.

Therefore at the l <'> i nterno of the I <"> accurrul o 6 ri nrarr <"> each time a how many t <"> of ari a that corresponds to the l in difference between the <'> ari a produced by the turbogas deducted of that l a request from l a continuous miechi na for drying.

This is how many t <"> of residual air that remains in the I <"> accumil o 6, mean an aspirator (the same aspirator as above or a further aspirator) can be <"> flow into the interior of the steam generator.

Thus the suction means, particularly those which move from the storage 6 towards the drying area, can be operated by the inverter.

In addition, a suitably programmed control system is envisaged which averages a specific algorithm calculating how many t <"> of ari a necessary to dry the passing paper (equations are used which are based on functional parameters of the paper l a ti pol ogy, thickness, urridity values <">, etc.). which in this way aspire the air contained in the I <"> accurrul o 6 and l a mind in the drying area.

The advantage is to have a centrifugal extractor <■> which by adjusting its rotation speed t <"> in a tight way allows you to regulate the exact fl ow of air to be aspirated from I <"> accurrul o for i nvi arl o in the drying zone.

In this way, all the thermal energy produced by the turbogas is exploited correctly.

All the regulations, controls and care are managed by the above-mentioned control system, who arroto DCS, which by means of a software developed <■> in the degree of manageability at which stage of produzi one.

There are sensors for the number of t <"> of ari a present to the l <'> i nternal of the I <"> accurrul o 6, given that, in the case of ari a is not present, < ■> necessary to produce them in advance of having to send them.

The fl ow of hot air, therefore, enters the drying device 10 starting from the I <"> accurrul o 6.

As shown in Figure 3, such a drying device is formed by a rotating roller 19 on which the sheets of paper to be dried are placed, so that through the rotation of the roller all the sheets o ious subjected to the drying fl ow dragged r ot az i onal rrent and by the roll itself.

The fl ow of air coming from Pl enum 6, see figure 1, comes to this end from two parts, that is, a left part 11 which interacts with the part of sheets or highly urri from and a right part 12 which is rrpatta against the sheet or which has already undergone a previous part of the drying.

For this reason, in itself, therefore, compliance according to a urri drying section 11 (sinus-hood urri da) and a dry drying section 12 (sinus-hood dry). The sheet from them enters the first part of the hood (hood urri da) with urridity <”> hours compared to when it comes out r <”> (sinus-hood dry). The hot air comes into contact with the sheets or sheets to be dried and is subsequently removed by means of twenty l ators which <■> are equipped with such micinar or drying.

The micchi nari or of drying <■> is thus made up of two hanging locks (11, 12), supported by a structure resting on the shoulder of the top. Each hood lock can operate depending on the other one as a quantity of air treated as well as as a terrperature of the air of puffs. Each hood lock can be removed from the circle by sliding (therefore translatable) on the first guide placed on the structure by means of pneumatic screws, according to the two arrows placed in the lower part of the figure 3 and having a double or towards the end of the contract.

Figure 3 shows in the right sine-hood and in the left the ducts 14 and 16 through which the hot air of the turbine is injected and accumulated in the plenum 6. The same figure shows the fl ow ducts 15 and 17 once these have the rrpacted on the angled portion 13 and 13 <"> to dry (<"> equivalent surface and sheet or .

In general, the air produced by the turbine runs exhaust gas and the nv ata at the I <"> accunrul o 6 is at a temperature of approximately 580éC which turbi na <■> i n capable of producing approximately 9.4 kg / sec of air fl ow.

The diagram of figure 1 therefore shows in the corrpl it the ropes cal di which from the reservoirs o 6 are sent in the first and two sections of the inlet of the l and two hoses with a recovery of the ropes towards the reservoirs o 7, recovery which it provides not only the ropes coming out from the duct 15 of the sine-hood 11 ITO also the cold ropes coming out from the l a sine-hood 12 through the duct 17.

According to the invention, therefore, the hot ropes of the products are those of the turbine which, after drying the paper, therefore exiting the drying area 10, are sent to the steam generator. and recovery through the container 7.

And <"> therefore I foresee the steam generator 8 in the new tank.

The steam generator recovers the thermal energy contained in the ropes exiting the hood and, in part, of the heat produced by the medium turbogas exhaust. The steam is re- quired from l to miechi na for production purposes.

The steam can then be used for various energy purposes. For example, as well as schemit i zzat o i n figure 1 or i n figure 4, the fl ow of steam produced with the air fl ows recovered or coming from the turbine are sent to roll 19 (which also rronol uci do) through special ducts (in accordance with the prior art) in order to dry the side of the paper web.

Claims (10)

RI SELL CAZI ONI 1. A filling (1) for the dryness of a ribbon or sheet or a corr endent paper: - A path (19) of passages or of the paper and one or more ducts (14, 16) through which a gaseous fl ow, for example or hot ropes, can be brought together to make the ur e of the card during its transit along said path; - A device (2, 3, 4) suitable for generating said drying gas fl ow; Characterized by the fact that said device <■> a turbine (2, 3, 4), the n parts will have the conbusti on (3) of the turbi na placed in the n fl ui n conuni cation with said ducts ( 14, 16) in such a knot as to be able to cause the unloading ropes to converge for (<“> drying towards the path of passages o (19). 2. An i np anto, according to claim 1, in which a current generator (5) is provided connected to the l <'> to the revolving shaft and to the turbine (2, 3, 4) in such node and to be able to produce electrical energy in correspondence of the I to rotation of the I <“> at the bero gi revol e. 3. A start, according to one or more of the previous sales, in which <■> a steam generator (8) is provided, placed in a flowable connection, in a straight or in a straight knot, with the turbine (2, 3, 4) in such a way as to be able to produce steam through the use of a part of the gaseous fl ow produced by the turbine, pr ef er the bi I ment and the unloading ropes of the turbi na. 4. An end (1), according to one or more of the previous claims, in which <■> a drying device (11, 12) is provided including one or more ducts (14, 16) and defining said path of passages or of the first card. 5. A filler (1), according to claim 4, in which said drying device provides a revolving roller (19) on which the tape or sheet to be dried is placed in use, The roll is facing towards said ducts (14, 16) in such a way that through its rotation the sheet or tape in the paper is dragged along the correspondence of said ducts (14, 16 ) from which he suffers from ari a. 6. A cover (1), according to claim 4 or 5, in which said drying device provides a left-sided hood lock (11), with an end and at least a duct (14) the ari a fl ow, and a right-hand hood (12) conrpr endent and at least one further duct of the ari a fl ow (16), the two hoods being placed around said roll and (19) the knot which is to be defined with respect to said roll and (19) the path of passages or the paper, said two breasts-hoods being nobi l i n knot so as to be able to pr ocamentally alway or initiate the knot from various areas with respect to the roll (19). 7. A layer (1), according to one or more of the previous claims, in which said steam generator (8) - in connection flows with the drying device in such a node to be able to send the steam produced. 8. A part (1), according to one or more of the previous sales, in which <■> including a first tanks or (6) the n commi cations fl ui from with the turbo na i n such node and that in such and first tanks the gases produced by the turbine can accumulate and constitute the fl ow for (<"> drying, said first drying device (11, 12) to which the fl ow is sent for (<“> drying, pre-bi I rrent and through suction means. 9. A filling, according to one or more of the previous sales, in which a second tank is included or (7) placed in the commi cation fl ui from with the drying device through one or more exhaust pipes (17) and / or with their primary tanks or (6) in such a way as to be able to accumulate a fl ow of gas coming from the drying device (11, 12) and / o the n output from the first tanks o (6). 10. A filler (1), according to one or more of the previous sales, in which said turbi na of the l a ti pol og to turbogas, preferably fed by natural gas and, even more à pr ef er i bi I ment e of the OPRA OP-16ha model.