JPS5851077B2 - Atsuriyokuyouki Tokunicellulose YojiyoujigamanaiNichippu - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for filling cellulose with fibrous material and liquid into the vapor phase in a processing vessel preferably operating continuously under the superatmospheric pressures required for the manufacture of valves.

Briefly, the main purpose of the invention is to be able to supply and adjust the amount of processing liquid together with the textile material, so that the ratio of textile material to liquid, the so-called wood-to-liquid ratio, can be controlled in the process and to the desired degree of steaming. The goal is to get the ratio as close as possible to the required ratio.

A supply valve consisting essentially of a housing and a rotor rotating within said housing with recesses that are periodically filled and emptied is shown, e.g.
With a feeding device of the known type according to No. 98, it is possible to feed different quantities of fiber material per unit time into a processing vessel with relative precision.

In this type of feeding device, the emptying of the rotor recess is carried out by rotating the rotor, so that the recess has an end connected to the digester and inside which the cooking liquor is circulated. It communicates with the external force circulation pipe.

The fiber material is thereby transported by the cooking liquor and fed into the digester.

In this way, the recesses are completely filled with an amount of cooking liquid that is greater than the amount of cooking liquid that was present therein immediately before the contents of the fibrous material were discharged.

This means that if the rotor of the digester or feeder continues to rotate, an amount of liquid will be discharged that corresponds to the amount of fiber material fed.

In order to maintain the liquid balance in the digester, it is necessary to somehow feed into the digester an amount of liquid that corresponds to the amount that is drained together with any new process liquid that may be added; This is often done with high pressure pumps.

This invention represents a novel method and apparatus that allows the desired fiber material and the necessary predetermined and desired amount of processing liquid to be fed into the digester.

Along with this, not only the amount of fresh processing liquid required for the cooking process, but also the amount of moisture in the fiber material and also the amount of condensate from the pre-treatment as well as the amount of leakage from the high pressure side to the low pressure side of the feeder. It deserves attention.

A preferred embodiment of the invention is illustrated in the accompanying drawings.

In FIG. 1, reference numeral 30 indicates a pretreatment container, and reference numeral 6
0 indicates a self-feeder type feeding device, ie, a so-called feeder, and 100 indicates a processing vessel, ie, a so-called digester.

If the pretreatment vessel 30 is operated under atmospheric pressure, finely divided fibrous material, for example wood chips 10, can be fed, for example, by an open charging device 20;
Alternatively, if the preimpregnation vessel or pretreatment vessel 30 is operating under some superatmospheric pressure or vacuum, the fiber material may be fed by a feeding device such as a cell feeder sealed against normal superatmospheric pressure. can.

The container 30 is, for example, a somewhat conical container of circular cross section with a delivery part 34 connected directly to the lower end, in which a driven delivery device 35 rotates.

The device 35 is, for example, of the "same plate table" type,
This supplies the lower blade with a certain amount of fiber material into the chamber 36 during its rotation.

Chamber 36 is part of a circulation circuit, which includes tubes 91 . ,
a feeder or supply valve 60, a pipe 75 through a connection or first port 65 and a connection or first outlet 74;
It is composed of a pump 76 and a pipe 77.

The pipe 77 has a branch pipe 37 for diluting the upper blade of the table 35 before the connection with the chamber 36 on the lower side of the table 35 .

The feeder 60 essentially consists of a housing 61 with a hole of generally conical design, in which a rotor 62 is rotated by a motor (not shown).

The rotor 62 is correspondingly conically shaped so that when the housing 61 and the rotor 62 wear out, the rotor 62
can be adjusted axially so that the same sealing effect is obtained.

The rotor 62 of the feeder 60 is provided with a number of through holes, two of which are designated 63 and 64.
It is shown in

When the rotor 62 of the feeder 60 is rotating, the through holes of said rotor 62 in turn communicate with openings provided around the housing 61, the openings on the outside of the housing having conventional pipe connections. can.

Each aperture in such a housing has diametrically opposed apertures such that when the through-hole of the rotor 62 passes through the aperture, the other end of the through-hole simultaneously passes through the diametrically-opposed aperture in the housing. , this allows the medium flowing through the container tubes connected to each tube connection in the housing 61 of the feeder 60 to flow through the feeder 60.

One or more of the openings in the housing 61 of the feeder 60 may be provided with a screening device.

Three such screening devices are shown at 92, 93, and 94 in FIG.

The illustrated housing 61 of the feeder 60 has around its periphery eight openings and eight connecting members, at least one of which connecting members 68 is connected to a high-pressure steam pipe 69 with a steam valve 70, said steam valve 70 is opened and closed in accordance with the rotation of the rotor 62 of the feeder 60.

That is, the through holes of the feeder are arranged to open each time they pass, so that the charge in the through holes passes through the opposite connecting members, namely the second outlet 80 and the connecting member 103, and enters the digester 100. "It's blown away."

For the chip-liquid mixture reaching the feeder 60 via the pipe 91, a portion of the liquid is purified by a screening device or screen 93, and this liquid passes through a connecting member 74 connected to a pipe 75, in which it is The flow is maintained by a circulation pump 76, which is connected on its pressure side by a line 77 to the delivery part 34 of the preimpregnation vessel 30.

The connecting member 81 of the housing 61 of the feeder 60 is a pipe 82
Via this pipe 82, the liquid purified by the screen 94 flows into a container, a so-called clock 83, in which the liquid level 84 in the upper steam chamber 85 is maintained.

On the outlet side of the clock 83, the pipe 86 leads to a control valve 87 which is subjected to opening and closing impulses from the level indicator 48, which is also exposed to the signals from the very high and very low levels 33. be shocked.

On the other side of the valve 87, a tube 90 opens into said tube 79.

A connecting member, that is, a third person lower 1 is provided diametrically opposite to the connecting member 81 of the feeder 60, and this is in open communication with the steam chamber of the upper blade of the liquid level 102 of the digester 100 via a pipe 72. are doing.

Alternatively, the connecting member 71 may be directly connected to an external steam pipe (not shown).

The opposite connecting member, ie, the fourth inlet lower 8 , through which fresh cooking liquid enters through the pipe 79 , is provided opposite the connecting member 66 having the inner screen 92 .

The connecting member or fourth outlet 66 is connected to the pipe 67;
The expanded steam is mainly guided from the through hole of the feeder 60 to a pipe 45 having a connecting member 44 and an outlet 46 .
6 is positioned, for example, in the center of the pretreatment vessel 30 and above its liquid level 33.

A level 101 of fibrous material is maintained in the digester 100 near a liquid level 102 .

This level 101 is located above the liquid level 102 as shown, but it may also be below the liquid level 102.

Below the digester 100 there is a liquid extraction screen and a device for adding the liquid or another liquid after cooling or heating, as well as cleaning and finishing the fibrous material in the digester 100, in a known manner (not shown). A device can be provided for the final addition of cooling liquid before the fibrous material at the stage of treatment is discharged from the digester 100 through the connection member 104.

The finely divided fiber material is fed by a charging device 20 into a preimpregnation container 30 in which it forms a level 32 which is adjusted, for example, by a gamma level regulator (not shown).

The liquid level 33 within the container 30 is also maintained by a level indicator 48 acting on a valve 87rI.

The pre-impregnation container 30 is.

In operation, charging device 20 charges approximately the same amount of fiber material as is delivered through tube 91 to feeder 60 by the lower device.

The liquid level 33 is maintained constant because the amount of liquid flowing out corresponds to the amount of liquid flowing in.

The influent partially contains moisture contained in the fibrous material;
It also has in part a condensate from the incoming steam or gas, which is fed from the feeder 60 via the pipe 67 into the preimpregnation vessel at the outlet 46, in addition to the steam not shown. It is possible to charge the pre-impregnated vessel via a pipe, and also partly via a pipe 79 which is fed into the device via a feeder 60 and is fed via a pipe 77 to the lower part of the pre-impregnated vessel. It consists of condensate from the fresh cooking liquor.

The liquid exiting the pre-impregnation container 30 is removed from the liquid which transports the fiber material via the tube 91 to the connection member 65 of the feeder, partly as liquid partially absorbed in and around the fiber material.

The amount of this liquid that transports the fiber material in this way is extracted through the screen 93, and this amount is extracted from the tube 75.
, pump 76 and pipe 77 to the pre-impregnation vessel 30.

When this extraction takes place, the through hole of the feeder 60 communicates with the connecting member 65.74.

The rotor 62 of the feeder 60 is considered to rotate counterclockwise.

When the through hole of the feeder is thus rotated to a position where it communicates with the connecting member 81 and the valve 87, the through hole receives high-pressure steam from the steam chamber of the digester 60 via the pipe 72. It is then filled with fresh steam.

When the through holes are pressurized in this manner, some of the liquid in and around the fibrous material passes through the screen 94 and into the tube 8.
2, returned via tank 83, pipe 86, valve 87 and pipe 90, and further mixed with fresh cooking liquor in pipe 79.

When one through hole of the feeder 60 is in a position f communicating with the connecting members 81, 71, at the same time another through hole is in a position communicating with the connecting members 66, 78, and at the same time the third through hole is in a position f communicating with the connecting members 66, 78. The fourth through hole may be located in communication with the connecting members 65, 74, and the fourth through hole may be located in communication with the connecting member 68, 80, which allows continuous inflow and outflow flow within the feeder 60. It means you always get it.

The amount of liquid passing through the screen 94 is regulated by a valve 87 which in turn is adapted to maintain a constant level 33 in the pre-impregnation vessel 30 via the level indicator 48.

Feeder 60 located in a position communicating with connecting members 81 and 71
The amount of liquid remaining in the through hole constitutes the amount of cooking liquid required for the process, and the amount of liquid remaining in the through hole constitutes the amount of cooking liquid required for the process, and is carried by high pressure steam from pipe 69 to digester 100 via pipe connection 80 and connection 103 of digester 100.
Supplied with fiber material inside.

In the synchronous steam valve 70, the through hole of the rotor wheel 2 is connected to the connecting member 68.
, 80.

The amount of liquid fed into the digester 100 in this way is only the amount of liquid leaving the feeder, since the amount of residual liquid leaving the pre-impregnation vessel in various ways can be as described above. Returned to pre-impregnated container.

After emptying the liquid and fibrous material charges in the through holes in communication with the connecting members 68 , 80 , the through holes are filled with steam at the same pressure as the pressure in the digester 100 .

During continuous rotation of the loader 62 of the feeder 60, the through hole is then placed in communication with the connecting member 66, 78, so that the steam in the through hole expands and the pressure reaches normal pressure in the feeder. This is because the through hole communicates with the tube 67 leading to the pre-impregnated vessel.

The through hole is located in the connecting member 66.7 before the connecting member 65.74.
In the position in communication with 8, it is then filled with cooking liquid via tube T9, and in the position in communication with said connecting element 65, 74 of the through hole, the rotor 62 of the feeder 60 rotates by half a revolution and the circuit is closed.

For some reason, the liquid from the pretreatment container is transferred to pipe 9 as described above.
0, but if not included in the steaming process, this liquid could alternatively be recycled through tube 8, shown in dashed line.
9 and can be discharged from the device.

All free liquid is then removed from the connecting member 81 of the through hole.
．． 71 and the impregnated fiber material is thus fed into the digester 100 in communication with the through-hole connecting member 68.80 without free liquid. can be done.

This is the case, for example, when the pretreatment is a prehydrolysis treatment, in which no provision is made to mix the hydrolyzate with the fresh treatment liquid.

FIG. 2 f shows a simple flow sheet to which this invention is applied as an example.

The flow sheet is a container for atmospheric pressure steaming (I) where finely ground fiber material flows into the equipment, and a container for low pressure impregnation (■).
and a digester with a vapor phase above.

The fiber material is fed as indicated by arrow A. In this case, the feeder 60 is placed in the upper part of the digester 100, and the pre-impregnation vessel (2) is placed in a lower position than the feeder 60.

The flow of liquid entering the delivery section 34 transports the fiber material which is fed by the table 35 through the tube 91 to the feeder 60.

The digester 100 itself is of the well-known type with bottom cleaning.

The pre-cleaned fibrous material is then discharged out of the container as indicated by arrow B in a known manner.

The details that are part of this invention are not limited to the embodiments described above;
Variations may be made within the scope of the claims.

This invention can be implemented as follows.

(1) A method of filling a pressure vessel 100, in particular a cellulose digester, with a chip-liquid mixture by means of a feed valve 60 consisting of one rotatable rotor 62 in a housing 61 with diametrically opposed inlets and outlets; , the rotor 62 has one or more through holes 63, 64.
, one of which communicates periodically during rotation of the rotor 62 with a first port 65 through which one through hole is filled with a charge of chip-liquid mixture and the liquid is passed through a first outlet. 7
4 through the screen 93, one of said through holes then communicates with a second outlet 80, via which the charge in the through hole is discharged into the pressure vessel 100 and with it the said filling position. A through hole at an intermediate position between the and the discharge position communicates with a third outlet 81 of the housing 61, through which at least a portion of the liquid filled in the through hole is transferred to a diametrically opposite third person. The liquid is discharged by the movement of the gas and/or steam applied through the lower 1, and the power wood is held in the through hole and the chip/liquid charge is discharged into the pressure vessel 100 and then the through hole. communicates with a fourth outlet 66 of the housing 61, through which the expanded gas and/or steam is conducted through the through hole into the impregnating or steaming vessel 30, and at about the same time said through hole is opened. When the housing 61 communicates with a diametrically opposed fourth type lower 8, liquid is added through the inlet lower 8, and the through hole further rotates to communicate with the first port 65 for the chip/liquid mixture. A method of filling a chip liquid mixture into a pressure vessel, particularly a cellulose digester, whose through holes are filled with liquid.

(2) The method according to the above item 1, wherein the gas and/or steam passing through the third person lower 1 used for moving the liquid in the through hole of the rotor 62 is taken out from the pressure vessel 100 via the connection part 72. .

(3) Before the liquid moved by the gas and/or steam passing through the third person lower 1 is returned to circulate, and the pressure is higher than the pressure inside the pressure vessel 100 and connected to the @ of the pressure vessel 100. 3. A method according to claim 1 or 2, wherein the pretreatment vessel is an impregnating vessel, for example in which a liquid level 33 is maintained.

(4) The method according to item 3 above, wherein the amount of liquid transferred by the gas and/or steam is regulated by the liquid level 33 in the pretreatment container 30.

(5) The method of item 1 above, wherein the valve 60 has a positive delivery effect on the liquid and the amount of liquid required for processing is supplied into the processing vessel 100 without using a liquid pump.

(6) Screening device 94 where the valve 60 is the third outlet 81
The method of item 1, wherein the method serves as a screen to purify the transferred liquid to obtain the chip-to-liquid ratio in the container 100 required for the process.

(7) A method according to any of the preceding items, in which the valve 60 has a supply force direction that is essentially perpendicular to the axis of rotation of the rotor 62.

(8) Consists of a rotor 62 with one or more through holes 63, 64, which rotor 62 can rotate within a housing 61 with a number of diametrically opposed inlets and outlets; A housing 61 has a first population 65 of the chip-liquid mixture, a first liquid outlet 74 with a screen 93 and a second outlet 80 connected directly or by piping to the pressure vessel 100 .
1 further has a third outlet 81 between the first population 65 and the second outlet 80, this third outlet 81 is covered by a screen 94, and the pressure vessel 100 is applied via the third person lower 1. The chip is held in the through hole during the movement of liquid by gas and/or steam from a pipe 72 extending from the top, and a third outlet 81 is provided in communication with the pipe 82;
The transferred processing liquid is discharged to the fourth type lower 8 provided after the second outlet 80, and a fourth outlet 66 having a piping 67 is provided in communication with the pretreatment container 30, and the expanded gas and (or) carrying out the method according to any of the preceding clauses 1 to 7, wherein the steam can be led through the through hole and the fourth type lower 8 is provided in communication with the piping 79 for adding the processing liquid; Device.

9. Device according to claim 8, in which the rotor 62 of the valve 60 has through holes 63, 64 arranged essentially transversely to its axis of rotation.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram showing a feeding device to a digester, and FIG. 2 shows an example of a flow sheet of the device. 30: Pretreatment container, 60: Valve, 61: Housing, 62
: Rotor, 63, 64: Through hole, 65: First population, 66
: Fourth outlet, 71: Third inlet, 72.79, 82: Piping, 74: First outlet, 78: Fourth inlet, 80: Second outlet,
81: Third outlet, 93.94 Niclean, 100: Pressure vessel.

Claims (1)

Claims: 1. A method for filling a pressure vessel, especially a cellulose digester, with a chip-liquid mixture by means of a feed valve consisting of a rotatable rotor in a housing with diametrically opposed inlets and outlets. wherein the rotor has one or more through holes, one of which communicates with the first population periodically during rotation of the rotor, and through which the chip-liquid mixture is charged into the one through hole. one of the through holes then communicates with a second outlet through which the charge in the through hole is discharged into the pressure vessel; At the same time, a through hole at an intermediate position between the filling position and the discharging position communicates with a third outlet of the housing, through which at least a portion of the liquid filled in the through hole is transferred to a diametrically opposite third outlet. The liquid is discharged by movement of gas and/or steam applied through three inlets; - the power wood is held in the through-hole, and the through-hole is opened after the chips/liquid charge has been discharged into the pressure vessel; It communicates with a fourth outlet of the housing, via which the expanded gas and/or steam is conducted through the through hole into, for example, an impregnating or steaming vessel, while at the same time said through hole extends in the diametrical direction of the housing. communicating with an opposing fourth inlet, through which liquid is added, and filling the through hole with liquid when the through hole is further rotated and communicates with the first port for the chip-liquid mixture; A method of filling a chip/liquid mixture into a pressure vessel, in particular a cellulose digester, characterized by: 2 consisting of a rotor with one or more through holes, which rotor is rotatable in a housing with a number of diametrically opposed inlets and outlets, and which housing is capable of rotating in a housing with a plurality of diametrically opposed inlets and outlets; a first liquid outlet with a screen and a second outlet connected directly or by piping to a pressure vessel, said housing further having a third outlet between said first liquid outlet and said second outlet; the third outlet is covered by a screen to retain the chips within the through hole during the movement of liquid by gas and/or vapor from the piping extending from the top of the pressure vessel applied through the third inlet; Three outlets are provided in communication with the piping, and one is provided after the second outlet. A fourth outlet having piping is provided in communication with the pretreatment vessel, into which expanded gas and/or vapor can be directed through the through hole. Apparatus for carrying out the method of claim 1, further comprising a fourth inlet in communication with the piping for adding process liquid.