CN217266617U - Injection nozzle and mixing device - Google Patents
Injection nozzle and mixing device Download PDFInfo
- Publication number
- CN217266617U CN217266617U CN202090000418.1U CN202090000418U CN217266617U CN 217266617 U CN217266617 U CN 217266617U CN 202090000418 U CN202090000418 U CN 202090000418U CN 217266617 U CN217266617 U CN 217266617U
- Authority
- CN
- China
- Prior art keywords
- injection nozzle
- fluid
- nozzle opening
- closing body
- nozzle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/0018—Devices for dispensing fibres in a fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
- B01F25/3133—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit characterised by the specific design of the injector
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
- B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
- B05B1/3073—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a deflector acting as a valve in co-operation with the outlet orifice
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
- B05B1/32—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages in which a valve member forms part of the outlet opening
- B05B1/326—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages in which a valve member forms part of the outlet opening the valve being a gate valve, a sliding valve or a cock
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C7/00—Digesters
- D21C7/06—Feeding devices
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/08—Regulating consistency
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
Abstract
The invention relates to an injection nozzle (3) for injecting a first fluid (1) into a mixing zone (4) traversed by a second fluid (2), having at least one nozzle opening (5), the cross section of which that can be traversed being changeable via a position-variable closure body (6). The mixing of the fluids (1, 2) is to be improved in that the closing body (6) is located on the side of the nozzle opening (5) directed toward the mixing zone (4).
Description
Technical Field
The invention relates to an injection nozzle for injecting a first fluid into a mixing zone through which a second fluid flows, having at least one nozzle opening, the cross section of which that can be flowed through can be changed by means of a positionally variable closure body.
The invention also relates to a mixing device having an injection nozzle with at least one nozzle opening, and to the use of an injection nozzle and a mixing device.
Background
Such nozzles are used in particular in the material preparation section of a paper mill in order to reduce or increase the consistency of the fibrous material suspension or to feed chemical additives to the fibrous material suspension.
It is known to adjust the specific consistency of the fibrous material suspension being treated in such installations. Should execute
In the case of a reduction in consistency, a more concentrated fibrous material suspension is mixed with a dilution liquid, for example backwater.
However, it is also possible to mix the high-consistency fibrous material suspension with dilution water or a fibrous material suspension having a low consistency in order to form the low-consistency fibrous material suspension.
From US 2002/0166645 a1 a mixing device for paper fibre suspensions is known, in particular for use in the feed line to the headbox. The mixing device is provided with an inner tube for one component and an outer tube for the other component. The inner tube ends here inside the outer tube, so that mixing can take place downstream. This mixing is supported by complex corrugated fittings.
DE 69915737T 2 describes a method for a permanent part for mixing a plurality of suspensions having different properties and in which a mixing tube is used. Most of the white water of the paper machine is guided as a main flow in this mixing pipe. In order to form a fibrous material suitable for use in the headbox of the paper machine, an additional flow of suspension is mixed into the mixing tube. The further suspension flow is, for example, fresh material from the material preparation, i.e. a homogeneous fibrous material suspension free of impurities. In this publication it is recommended that the additional suspension added to the main flow is added at a rate ratio corresponding to a value between 3 and 15. In this prior art, therefore, a propelling jet of suspension with a relatively high consistency is formed.
When feeding a fluid into a flowing fibrous material suspension, the problem of mixing as well as possible is raised in principle. This is particularly true for mixing a liquid containing a chemical additive into the fibre suspension flowing through the pipe.
Here, a small percentage of the amount of fibrous material and/or additive must be introduced uniformly and simultaneously into the entire fibrous material suspension. Furthermore, in cardboard and wrapper manufacture, different weights per unit area are often produced by one production line, which results in different consistencies at the headbox.
The metering gun described in DE10317865 may not yet fully satisfy this.
SUMMERY OF THE UTILITY MODEL
The object of the invention is therefore to ensure, with relatively simple means, an as interference-free as possible injection of the fluid and as strong a mixing as possible.
According to the invention, this object is achieved in that the closing body is located on the side of the nozzle opening directed toward the mixing zone.
The size of the cross-section of the nozzle opening through which the fluid can flow can be adjusted by the position of the closing body, and thus also the jet speed and the pressure loss in the first fluid.
Since the closing body is located here on the side of the nozzle opening directed toward the mixing zone, the risk of blockages due to fibers or impurities is significantly reduced.
If the cross-section of the nozzle opening through which the fluid can flow is to be increased, the closing body is moved away from the nozzle opening, i.e. in the direction of the mixing zone.
In order to reduce the cross section of the nozzle opening through which the fluid can flow, the closing body is moved towards the nozzle opening or even into the nozzle opening.
In order to design the cross-sectional change and the change in position of the closing body as simply as possible, the closing body should be arranged concentrically with respect to the nozzle opening and/or be movable via a closing body shaft guided through the nozzle opening.
In order to facilitate better mixing of the fluid in the mixing zone, the cross-section between the nozzle opening and the closing body through which the fluid can flow should vary in its width around the nozzle opening. Thus, the effective area for injection is also changed.
In this case, it has proven particularly effective if the cross-section between the nozzle opening and the closing body, through which flow can take place, is formed at least substantially, preferably exclusively, by a plurality of channels, and each channel of the cross-section through which flow can take place is assigned a separate closing body wing, which is preferably detachably connected to the closing body shaft of the closing body.
The flow-through cross section of the respective channel can be varied and closed by the closure wings.
Since in particular the closure flap is subject to high wear, replacement of the closure flap can be achieved via a detachable connection to the closure body shaft, and thus a significant extension of the service life of the injection nozzle can be achieved.
The passages must be as large as possible due to the fibres and the risk of clogging associated therewith, but must be as small as possible in order to ensure the highest possible injection speed.
In view of the simple adjustability of the effective cross section of the channel, the channel should therefore also be slot-shaped and preferably have a width of between 30mm and 60 mm.
In order to influence the flow of the first fluid, in particular to accelerate it, the closing body, in particular the closing body wings, have a concave or convex shape in the flow direction of the first fluid on the side pointing towards the nozzle opening.
For better mixing with the second fluid, it is advantageous if the side of the closing body, in particular of the closing body wings, which is directed toward the nozzle opening, forms an angle of between 30 and 75 ° with the closing body axis which leads out of the nozzle opening.
For this purpose, it may also be advantageous for the side of the closing body, in particular of the closing body wing, which is directed toward the nozzle opening, to have a flow contour for influencing the flow of the first fluid.
In order to facilitate improved handling in the event of possible replacement, the closure, in particular the closure wings, should be detachably mounted on the closure body shaft, in particular also be of hollow design. This in turn makes its manufacture easy.
Advantageously, at least some of the closure, in particular its closure wings, are applied in layers completely from liquid, pasty or solid starting materials and are subjected to a physical or chemical hardening or melting process. This enables a weight and material saving embodiment of the structure.
It is important in connection with the mixing device that the interfering body, which has at least one directional component, sinks vertically into the flow of the second fluid before the mixing zone in the flow direction. This results in the formation of turbulence in the flow of the second fluid, which promotes mixing of the two fluids in the mixing zone.
This is particularly simple and effective if the interfering bodies are fastened to the housing of the injection nozzle and at least one interfering body comprises a part of the nozzle opening, in particular a channel.
Advantageously, the injection nozzle should be oriented at least substantially in the flow direction of the second fluid, and the mixing zone is preferably formed by a mixing tube through which the second fluid flows.
A preferred application is obtained when the first fluid is formed by a fibrous material suspension with a concentration of fibrous material preferably between 2.5% and 4.5%, and/or the second fluid is formed by water or a fibrous material suspension with a lower concentration of fibrous material.
The mixing quality can thus also be ensured over a wide production range.
Drawings
In the following, the invention is explained in more detail with the aid of exemplary embodiments. Wherein:
fig. 1 shows a schematic cross section through a mixing device;
fig. 2 shows a view of the injection nozzle 3;
fig. 3 shows a schematic cross section through an injection nozzle 3; and is
Fig. 4 shows a side view of another injection nozzle 3.
Detailed Description
An important application of the invention is the provision and pretreatment of the material flow in the flow system (Konstantteil) before the headbox of a paper machine.
The mixing device shown in fig. 1 in the form of a mixing tube is supplied with a dilution liquid, for example white water, as the main flow (second fluid 2) via an inlet. Coupled to the inlet in the flow direction of the dilution liquid is a tube segment having a curvature of at least 45 °, in particular about 90 °.
In the region of the pipe segment, a fibrous material suspension (first fluid 1) of high consistency is conveyed into the dilution liquid by means of the injection nozzle 3 via a further inlet, the consistency of which is in the range between 2% and 6%, in particular between 2.5% and 4.5%.
The mixing zone 4 after the two flows 1, 2 have joined is located in the straight pipe section downstream of the pipe segment and can also have a static mixer, not shown here, for improved mixing.
Furthermore, the main flow (second fluid 2) can also be accelerated via the cross-sectional reduction in the region of the injection nozzle 3 for better mixing.
Here, the fibrous material suspension of high consistency (first fluid 1) is delivered at a flow rate in the range of 5 to 15m/s and higher than the flow rate of the dilution liquid (fluid 2).
In order to keep the fibrous material suspension of high consistency (first fluid 1) as far into the centre of the dilution liquid flow (second fluid 2) as possible, the injection nozzle 3 projects relatively far beyond the inner wall of the pipe segment. Here, the injection nozzle 3 arranged centrally in the straight tube of the mixing zone 4 is oriented in the flow direction of the second fluid 2.
After mixing, the fibrous material suspension may be led through a line to the headbox of the machine for the manufacture of a fibrous material web, in particular a paper web.
An injection nozzle 3 for injecting a first fluid 1 into a mixing zone 4 through which a second fluid 2 flows has a nozzle opening 5, the cross-section of which that can be traversed being variable via a variably positioned closing body 6.
According to fig. 2 and 3, the closing body 6 is located here on the side of the nozzle opening 5 directed toward the mixing zone 4.
In order to increase the cross-section of the nozzle opening 5 through which the fluid can flow, the closing body 6 is moved in the flow direction of the fluid 1 away from the nozzle opening.
The movement of the closing body 6 counter to the flow direction of the fluid 1 towards the nozzle opening 5 leads to a reduction of the effective nozzle opening 5 and finally to a closing of the nozzle opening.
For this purpose, the closure body 6 is arranged concentrically with the nozzle opening 5 and can be moved via a closure body shaft 7 which leads out of the tube segment through the nozzle opening 5.
The closing body 6 after the nozzle opening 5 has proven to be advantageous for avoiding blockages due to a high fiber content.
In order to promote the mixing of the two fluids 1, 2 in the mixing zone 4, the flow-through cross-section between the nozzle opening 5 and the closure body 6 is formed by a plurality of slot-like channels 8 extending radially from the closure body axis 7, as can be seen in fig. 2.
The number of channels 8 is between 2 and 10, preferably between 4 and 8, and the gap width is between 30mm and 60 mm.
In order to vary the cross-section of the channels 8 through which flow can pass, each channel 8 is assigned a separate closure wing 9 which is detachably connected to the closure body shaft 7 of the closure body 6.
The part of the closing body 6, i.e. of the closing body wings 9 and of the closing body shaft 7 which projects at least partially into the mixing zone 4 when the injection nozzle 3 is open, additionally causes a vortex and thus supports the mixing of the fluids 1, 2.
In order to provide the fluid 1 with a directional component transverse to the flow direction of the second fluid 2 during the injection of the fluid 1 in order to enhance mixing, the side of the closing body 6, i.e. the closing body wing 9, which is directed toward the nozzle opening 5, as can be seen in fig. 3, forms an angle of between 30 ° and 70 ° with the closing body axis 7 leading out of the nozzle opening 5.
In order to accelerate the first fluid 1 to be injected, the closing body wing 9 can, as shown, have a concave or convex shape in the flow direction of the first fluid 1 on the side pointing towards the nozzle opening 5. A flow contour, such as a recess, a barrier or the like, for influencing the flow of the first fluid 1 can also be arranged on this side of the closure wing 9.
For the purpose of creating turbulence in the flow of the second fluid 2, in fig. 4, a plurality of interfering bodies 11 are present in the flow direction before the mixing zone 4, which (transversely to the flow direction of the second fluid 2) sink into the flow of the second fluid 2. The turbulence significantly improves the mixing of the two fluids 1, 2 in the subsequent mixing zone 4.
In order to facilitate a simple and effective structure, the interfering body 11 is fastened to the housing 10 of the injection nozzle 3, or even to a part of the housing 10 as can be seen in fig. 4.
In order to bring the interfering bodies 11 as close as possible to the nozzle opening 5 and thus also to the mixing zone 4, each interfering body 11 here comprises a part of the nozzle opening 5. Accordingly, in the solution according to fig. 4, a channel 8 leads from each interfering body 11 into the mixing zone 4.
The housing 10 and the closure body 6 of the injection nozzle 3 can be at least partially made of metal or plastic, in particular fiber-reinforced plastic. The disk-shaped head contour, into which the slot for the channel 8 is milled, is particularly suitable as a housing 10.
In order to facilitate assembly and thus replacement of the closure wing 9 in the event of wear thereof, the closure wing is detachably mounted on the closure body shaft 7 and is hollow.
This, in turn, enables a simplification of the production by the closure flap 9 being applied in layers entirely from liquid, pasty or solid raw material and being subjected to a physical or chemical hardening or melting process.
Claims (17)
1. Injection nozzle (3) for injecting a first fluid (1) into a mixing zone (4) through which a second fluid (2) flows, having at least one nozzle opening (5) whose cross-section that can be flowed through can be varied by means of a variably positioned closing body (6), wherein the closing body (6) is located on the side of the nozzle opening (5) that is directed toward the mixing zone (4), characterized in that,
the cross-section which can be traversed between the nozzle opening (5) and the closing body (6) is formed by a plurality of channels (8), and a separate closing body wing (9) is associated with each channel (8) of the cross-section which can be traversed.
2. Injection nozzle (3) according to claim 1,
characterized in that the closing body (6) is arranged concentrically with respect to the nozzle opening (5).
3. Injection nozzle (3) according to claim 1 or 2,
characterized in that the closure body (6) is displaceable via a closure body shaft (7) guided through the nozzle opening (5).
4. Injection nozzle (3) according to claim 1 or 2,
characterized in that the cross-section between the nozzle opening (5) and the closing body (6) through which the flow can pass varies in its width around the nozzle opening (5).
5. Injection nozzle (3) according to claim 1,
characterized in that the closure flap (9) is detachably connected to a closure body shaft (7) of the closure body (6).
6. Injection nozzle (3) according to claim 5,
characterized in that the channel (8) is designed in the form of a slot.
7. The injection nozzle (3) according to claim 5,
characterized in that the channel (8) has a width between 30mm and 60 mm.
8. Injection nozzle (3) according to claim 1 or 2,
characterized in that the closing body (6) has a concave or convex shape on the side pointing towards the nozzle opening (5).
9. Injection nozzle (3) according to claim 8,
characterized in that the closing body wing (9) has a concave or convex shape on the side pointing towards the nozzle opening (5).
10. Injection nozzle (3) according to claim 1 or 2,
characterized in that the side of the closing body wing (9) of the closing body (6) directed toward the nozzle opening (5) forms an angle of between 30 DEG and 75 DEG with the closing body axis (7) leading out of the nozzle opening (5).
11. Injection nozzle (3) according to claim 1 or 2,
characterized in that the side of the closing body wing (9) directed towards the nozzle opening (5) has a flow contour for influencing the flow of the first fluid (1).
12. Injection nozzle (3) according to claim 1 or 2,
characterized in that the closure body (6) or the closure body wings (9) are hollow.
13. Mixing device having an injection nozzle (3) according to one of claims 1 to 12 for injecting a first fluid (1) into a mixing zone (4) traversed by a second fluid (2), the injection nozzle having at least one nozzle opening (5),
characterized in that an interfering body (11) is immersed in the flow of the second fluid (2) before the mixing zone (4) in the flow direction.
14. The mixing device as set forth in claim 13,
characterized in that the interfering body (11) is fastened to the housing (10) of the injection nozzle (3).
15. Mixing device according to claim 13 or 14,
characterized in that at least one interfering body (11) comprises a part of the nozzle opening (5).
16. Mixing device according to claim 13 or 14,
characterized in that at least one interfering body (11) comprises a channel (8).
17. Mixing device according to claim 13 or 14,
characterized in that the injection nozzle (3) is oriented in the flow direction of the second fluid (2) and the mixing zone (4) is formed by a mixing tube through which the second fluid (2) flows.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019111122.6 | 2019-04-30 | ||
| DE102019111122.6A DE102019111122A1 (en) | 2019-04-30 | 2019-04-30 | Injector nozzle |
| PCT/EP2020/057122 WO2020221500A1 (en) | 2019-04-30 | 2020-03-16 | Injector nozzle, mixing assembly and use of the injector nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217266617U true CN217266617U (en) | 2022-08-23 |
Family
ID=69953982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202090000418.1U Active CN217266617U (en) | 2019-04-30 | 2020-03-16 | Injection nozzle and mixing device |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3962636B1 (en) |
| CN (1) | CN217266617U (en) |
| DE (1) | DE102019111122A1 (en) |
| WO (1) | WO2020221500A1 (en) |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1561697A1 (en) * | 1967-04-15 | 1970-10-01 | Voith Gmbh J M | Process for the continuous dilution and / or mixing of long, spinning-prone fibers containing suspensions and apparatus for carrying out this process |
| US3782884A (en) * | 1972-05-09 | 1974-01-01 | Standard Oil Co | Acid gas burner |
| JPS5721019U (en) * | 1980-07-10 | 1982-02-03 | ||
| FR2631353A1 (en) * | 1988-05-13 | 1989-11-17 | Semti | PASTA MIXED FEEDING DEVICE |
| DE4306072C2 (en) * | 1993-02-26 | 1994-12-08 | Siemens Ag | Device for opening and closing a passage opening in a housing |
| US5678766A (en) * | 1995-07-19 | 1997-10-21 | Peck; William E. | Foam nozzle |
| DE19720528A1 (en) * | 1997-05-16 | 1998-11-19 | Gelhard Volker Dipl Ing Dipl W | Liquid and powder particle mixing apparatus |
| DE19859770A1 (en) | 1998-06-29 | 1999-12-30 | Voith Sulzer Papiertech Patent | Method and device for mixing suspension of substances |
| FI114030B (en) | 1999-10-12 | 2004-07-30 | Metso Paper Inc | Method and arrangement for mixing pulp components of papermaking |
| DE10232693A1 (en) * | 2002-07-18 | 2004-02-05 | Siemens Ag | Fuel injection valve, for an IC motor, has structured outer surfaces for the valve housing and the closed valve plate to give a smooth surface over the dividing line which is free of steps/edges to prevent the entry of burned fuel residue |
| DE20321803U1 (en) | 2003-04-09 | 2010-04-08 | Voith Patent Gmbh | Arrangement for feeding a second liquid to a paper pulp suspension |
| DE102008012725A1 (en) * | 2008-03-05 | 2009-09-24 | United Waters International Ag | Apparatus for fumigation of liquids |
| DE102012212529A1 (en) * | 2012-07-18 | 2014-01-23 | Voith Patent Gmbh | Security paper-flow system |
| NL2010972C2 (en) * | 2013-06-14 | 2014-12-31 | Ecoscrub Solutions B V | PRE-TREATMENT DEVICE FOR A WET GAS WASHER. |
| JP6293643B2 (en) * | 2014-11-05 | 2018-03-14 | 株式会社東芝 | Nozzle device and processing device |
| DE202017102911U1 (en) * | 2017-05-15 | 2017-06-21 | Evertz Hydrotechnik Gmbh & Co. Kg | Device for irrigation of roadways |
-
2019
- 2019-04-30 DE DE102019111122.6A patent/DE102019111122A1/en active Pending
-
2020
- 2020-03-16 CN CN202090000418.1U patent/CN217266617U/en active Active
- 2020-03-16 WO PCT/EP2020/057122 patent/WO2020221500A1/en unknown
- 2020-03-16 EP EP20713538.5A patent/EP3962636B1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE102019111122A1 (en) | 2020-11-05 |
| EP3962636A1 (en) | 2022-03-09 |
| EP3962636B1 (en) | 2024-04-03 |
| WO2020221500A1 (en) | 2020-11-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FI116147B (en) | Mixing flows in papermaking process involves by feeding first flow through a tube, and feeding second flow into first flow via feed opening which is in connection with space limited by the tube | |
| KR101367046B1 (en) | Method and arrangement feeding chemicals into a process stream | |
| JP5350401B2 (en) | Method and arrangement for blending rich raw material into short circuit of fiber web machine | |
| JP4559360B2 (en) | Mixing stirrer, mixing stirring method and gypsum board manufacturing method | |
| FI115512B (en) | Method and apparatus for performing foam molding | |
| FI122737B (en) | Apparatus for mixing a gaseous or liquid substance with a fiber suspension | |
| JP4571718B2 (en) | Apparatus and method for metering auxiliary material in a paper machine flow box | |
| US11376555B2 (en) | Baffled donut apparatus for use in system and method for forming gypsum board | |
| RU2432988C2 (en) | Mixing chemical substances in tube for fluid mass | |
| CN217266617U (en) | Injection nozzle and mixing device | |
| US20160038897A1 (en) | Arrangement for mixing a fluid to a process liquid and a method of operating the arrangement | |
| US5709777A (en) | Device and method for the non-clogging throttling of a fluid stream of suspended matter | |
| CN102834562A (en) | Valve for regulating a fluid flow | |
| CN109629307A (en) | A kind of paper machine headbox | |
| US2506678A (en) | Apparatus for use in making paper | |
| CN212925597U (en) | Pulp homogenizing system of pulp flow box of paper machine | |
| WO2009037091A1 (en) | An apparatus for discharging pulp from a vessel, method of discharging pulp form a vessel and method of upgrading a pulp vessel | |
| CN1773012B (en) | Method and device for mixing suspensions | |
| US10252228B2 (en) | Method and device for feeding at least one chemical substance into a main process stream | |
| CN113005803A (en) | Method and apparatus for adding additional raw material components to a flow system of a fiber web machine | |
| FI111397B (en) | A method and apparatus for feeding a chemical to a fiber suspension | |
| CN208583278U (en) | A kind of slurry pond for tungsten mineral processing production | |
| CN204982538U (en) | Do strong agent and add device | |
| CN211006146U (en) | Floating cylinder pressure forming device | |
| US8048270B2 (en) | Apparatus for distributing a pulp flow |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |