CN1140420A - Apparatus for mixing a first fluid into a second fluid - Google Patents

Abstract

The invention relates to a device for mixing a first fluid into a second fluid, comprising a housing (1) with a second fluid flow chamber (39); a restriction (6) in the flow chamber and means (18) for introducing a first fluid into at least one gap (15, 16) between the restriction and a wall (5, 10) of the flow chamber (39) facing the restriction, the invention being characterized in that: the flow restriction being in a plane perpendicular to the main flow direction (31) of the second fluid and the flow chambers being in the same plane, the flow chamber being substantially wedge-shaped, there being a gap (15, 16) between each of the two sides of the flow restriction converging in the wedge and the wall of the wedge-shaped flow chamber facing the flow restriction; means (18) for introducing the first fluid are provided in the region of the two above-mentioned gaps.

Description

First fluid is sneaked into the equipment of second fluid

The present invention relates to be used for first fluid is sneaked into the equipment of second fluid, this equipment comprises:

-one housing with second fluid flow chamber,

-one constriction in described flow chamber, and

-be used for described first fluid is introduced in the device in the face of at least one gap between those walls of constriction of constriction and flow chamber.The present invention be more particularly directed to a kind of equipment, it is used for a kind of fluid, and preferably gas such as steam, ozone or oxygen are sneaked in the cellulose paper mass suspension.

Owing to many reasons may be difficult to carry out by direct Steam Heating liquid and suspension.One of difficult point is to make steam atomization, and suspension is in can be continuously, the motion state of condensation smoothly, and this just requires steam atomizing equably in liquid or suspension.When steam increased, the steam bubble amount may be very big in addition.The continuous condensation that makes the thermal convection current between steam and the liquid be not enough to realize ideal.Therefore, can form intermittently, violent steam implode, thus causing shock and vibration, its severe degree may cause mechanical failure, and this phenomenon can be aggravated when quantity of steam increases greatly.

Generally many requirements can be proposed to steam mixer.In by the process of blender, should not take place local superfluous when increasing steam.The generation of degraded or so-called fluidisation must reduce the variation of local pressure as far as possible.The implode that takes place because of steam bubble should can not be subjected to taking place because of cavitation causes the part of damage at member or structural material.Blender should have certain intrinsic bullet shape shape so that its can absorb and flow to and flow through pressure and the impact that possible instantaneous turbulent flow causes in the steam of blender and the paper pulp stream.

The public has known that many kinds are used for air-flow is sneaked into the equipment of pulp suspension.Auspicious bent patent has been described a kind of equipment No. 486341, and it is used to mix suspension and a kind of gas as ozone, oxygen and chlorine form of the fibrous material of cellulose, and contains the various active materials such as the liquid of chlorine dioxide.In its basic principle, this blender comprises an infundibulate part, and a conical movable members is wherein arranged.Form an adjustable clearance between infundibulate part and conical part, paper pulp is by this gap.Many openings that are provided with for the fluid of preparing to sneak into the paper pulp that passes through are arranged on the wall of infundibulate part, the defective of this equipment is that its volume is bigger, because paper pulp flows to variation in blender, the installation complexity in existing pipe-line system particularly, this pipe-line system that just requires to connect this blender must change direction, and this blender requires the mounting bracket or the base of certain form.

It also is common having the mixing device that is used for fluid is sneaked into the rotating part of paper pulp, the asking of this equipment, and topic is, and rotation can cause that big pressure changes, and this can form the very low zone of pressure of vapor stream warp, thereby introduces above-mentioned implode.Another problem is the steam that distributes in pulp suspension equably, particularly when preparing a large amount of supply steam, thereby also can cause capacity problem.

The objective of the invention is to address the above problem.Therefore, according to the present invention, provide a kind of mixing device, it is without any rotational parts, it does not require as second fluid as described in the pulp suspension and to flow it to change its main flow direction be prerequisite constituting, its compact conformation, and also it does not require mounting bracket or base.

Above-mentioned purpose and advantage with other of the present invention are to realize by the feature of the present invention that limits in claims.Further feature of the present invention, aspect and advantage are further elaborated by following preferred embodiment.

Contrast the following drawings describes preferred embodiment in detail now.

Fig. 1 is the end-view according to the partly cut-away of equipment of the present invention.

Fig. 2 is the cutaway view along II-II line among Fig. 1.

Fig. 3 is a phantom of taking from Fig. 2, the embodiment of expression distribution member.

Fig. 4 is the stereogram of the constriction of a constitution equipment part.

Fig. 5 is corresponding with Fig. 2, according to the sectional side view of the equipment of alternate embodiment of the present invention.

Fig. 6 is the stereogram according to the constriction in the equipment of alternate embodiment of the present invention.

Fig. 7 is the stereogram according to the constriction in the equipment of another embodiment of the present invention.

According to the present invention, device A comprises a main body, hereinafter be called housing 1, housing 1 has first end wall 37 on a tubular or cylindrical outer wall 36, a plane, second end wall 38 that also can be the plane (but among the embodiment, it is inside taper shape), and the continuous slotted hole between first and second end walls, hereinafter be called flow chamber 39, its side is subjected to the restriction of a pair of locular wall 5,10.The shape of flow chamber 39 will describe in detail hereinafter.

Flow chamber 39 is divided into two circular segment part 37a and 37b with first end wall on plane, and second end wall 38 also correspondingly is divided into two part 38a and 38b, and these two parts can be described as conical portion, perhaps when end wall 38 be the circular segment on plane during for the plane.At outer wall 36 and wall 5, form the first space outerpace 40a between 37a and the 38a, and correspondingly form the second space outerpace 40b at the opposite side of housing 1.Be called first fluid and preparation above and sneak into the feed-line 41a of the fluid of described second fluid, 41b leads to the first and second space outerpace 4a, 40b.According to embodiment, described first fluid is a steam, but also can be other gas such as oxygen, ozone, chlorine dioxide and/or a kind of liquid in other application scenario of equipment.

Device A is fixed between two pipelines 32,33 by housing 1, and according to embodiment, above-mentioned pipeline has identical diameter with the outer wall of housing 1, but also different diameters can be arranged.Said fixing can realize by common modes such as bump joints.The label of the pair of flanges on housing 1 is 34,35.Here, have housing 1 device A towards, described second fluid is upwards flowed from pipeline 32 by flow chamber 39, and it is upwards mobile again by pipeline 33, housing 1 with first end wall 37 on plane towards described second fluid enter pipeline 32, and with to second end wall 38 of inner conical pipeline 33 towards outflow.

At the two ends of flow chamber, the outer wall of housing 1 has opening, thereby forms opening 43 and 44.Flow chamber 39 is connected with the first and second cylinder spaces 45 and 46 that are located at housing 1 outside respectively by opening 43,44.Relevant first and second cylinders 27 and 28 are welded on the outer wall 36 of housing 1.First and second pistons 25 and 26 are housed respectively in cylinder 27,28.First piston 25 is connected on the fluid power piston 21 in the fluid cylinder 20 by piston rod 23.The label of a pair of hydraulic oil supply line is 20a, 20b.Available pneumatic operation replacement liquid press operation.When cylinder 20 was cylinder, pipeline 20a, 20b were air line.

Be provided with constriction 6 in flow chamber 39, constriction 6 is from the first cylinder space 45, by first lateral openings 43, and whole flow chamber 39, and stretch into the second cylinder space 46 through second lateral openings 44.In the constriction that constriction 6 constitutes in the flow chamber, it also constitutes the connector between two- piston 25 and 26, and piston 25 is being connected the two ends of constriction 6 with 26.

The integrated support structure that constitutes by constriction 6, first and second pistons 25,26, piston rod 23 and fluid cylinder or cylinder piston 21 shown in Figure 4.The longitudinal axis of constriction 6, the label that also is the center line of piston 25 and 26 is 24, and it is perpendicular to the center line 31 of housing 1, and it is the main flow direction of described second fluid, and described first fluid is carried and prepared to sneak into to second fluid by pipeline 32 and 33.

As Fig. 1, shown in 2 and 4, the basic configuration of constriction 6 is a hexahedron, be by pair of sidewalls 7,8, diapire 48, roof 49, aft bulkhead 50 and front bulkhead 51 limit, and aft bulkhead 50 is connecting first piston 25, and front bulkhead 51 is connecting second piston 26.More particularly, constriction 6 is double-wedges, vertically, promptly pass through two sidewalls 7 of gathering mutually in the direction of axis 24,8 are wedge shape, and, on the direction of the axis 31 towards the diapire 48 of facing second fluid that flows into, also be wedge shape from roof 49 in the horizontal by the mutual identical end wall 7,8 that draws in.

Flow chamber 39 has and constriction 6 about consistent shapes.When constriction 6 was placed in the flow chamber 39 symmetrically, the sidewall 7,8 of constriction but formed a low-angle with the sidewall 5 of flow chamber 39 and 10 respectively.Therefore, form gap 15 and 16 respectively between sidewall 5,7 and 8,10, these gaps are widened on flow direction slightly.These two gaps 15,16 constitute the passage that flow to second fluid of pipeline 33 from pipeline 32 by device A of the present invention.When symmetric position, the wall that limits gap 15,16 in principle can be parallel, but preferably from parastate little skew is arranged, thereby add the broad gap shape.

Device A also comprises the device of described first fluid being introduced gap 15,16, and first fluid is made of steam in contemplated application.On the one hand, said apparatus comprises two space outerpace 40a and 40b, and the feed pipeline 41a and the 41b that lead to these spaces, also comprises the hole 18 on the sidewall 5 and 10 of flow chamber 39 on the other hand.Hole 10 is along the distribution of lengths of sidewall 5,10, preferably respectively compared with the distance of the outlet 13 of gap 15 and 16 and 14 more near its import 11 and 12.Hole 18 can be circular hole or be gap or seam.Term " hole " should be more extensive, comprises opening, line of rabbet joint or the like, and no matter its shape how.In shaft section, the shape in hole is from space outerpace 40a, and 40b 15,16 widens towards the gap.Second fluid that this shape is suitable for upwards flowing by gap 15,16 is the situation that contains the suspension of fiber.If the fluid that second fluid one is sneaked into is by feed pipeline 41a, the feed of 41b is interrupted and the fibrous material of cellulose continues to flow through device A, and so, hole 18 is stopped up by fibrous material, can not enter space outerpace 40a, 40b.When steam or the different fluids of sneaking into are connected once more, when entering space 40a and 40b respectively by pipeline 41a and 41b, this fluid can blow the fiber that stops up in the hole 18 open, and it can be used once more.

As modification or improvement, hole 18, seam or similar device can be arranged on the interchangeable panels of separation, and this plate can be with one on screw threads for fastening and the filled sidewall 5,10 than big opening.This interchangeable panels can be provided with the hole 18 of different numbers or be provided with the hole 18 of difformity, position, size etc., and the user can increase the chance of other condition of adaptation that becomes a mandarin that makes first fluid (being steam in this example) by a plurality of this interchangeable panels.For example, if in the big facility that constitutes a part according to equipment of the present invention, should change working condition, so just interchangeable panels can be changed so that make the hole on the plate be fit to altered working condition.

In fact also can come feed steam or other first fluid by constriction 6, in this case, opening correspondingly is arranged on the sidewall 7,8 of described constriction, the inlet 11,12 in preferably close gap 15,16.

Be installed in the also part of constitution equipment of the pressure detecting sensing part of equipment upstream and downstream and control device (not drawing among the figure), controller influences pipeline 20a, flow among the 20b is with control piston 21, so that control wedge shape constriction 6 perpendicular to the constriction of the main flow direction of pulp suspension by device A or similar liquids vertically on move, can regulate gap 15 thereby make, 16 width makes by the flow of equipment controlled.

Below in the description how equipment is worked, suppose upwards by pipeline 33,34 flow, and the fluid that is called second fluid in the claims and above is cellulose fibre pulp suspension in water, and the described first fluid of preparing to introduce to this suspension is steam.

Pressure measured value in the fibre pulp suspension of device A upstream and downstream is measured or be received in to above-mentioned press detection sensor (not shown) and control device so that record pressure reduction.Control device compares the pressure reduction and the predetermined value of record.Predetermined value waits according to main working condition such as temperature, denseness, paper pulp kind and capacity and sets.This setting is preferably carried out automatically.

By regulating the flow of pressure or hydraulic line 20a and 20b, control device drive controlling cylinder 20 makes constriction 6 on the direction of axis 24, promptly perpendicular to the main flow direction consistent with axis 31 move forward and backward, so that gap 15,16 is adjusted to the width that needs.

For example, if at inlet side, that is, pressure increases in pipeline 32, and this will be noted by described sensor and control device, and master cylinder 20 is driven and mobile constriction 6 perpendicular to main flow direction 31 ground, thereby increases the width in gap 15,16.The flow area of Zeng Daing will make obstruction be dispersed like this, obtain bigger paper pulp stream, and until the pressure decline of inlet side, it is normal that pressure reduction recovers.Then, master cylinder 20 is driven again, and gap width is reduced, and continues to carry out said process repeatedly, until reaching stable state.

Constriction 6 is by 25,26 its axially-movables of control of the piston in the cylinder 27,28, make the longitudinal axis 24 of constriction 6 always keep coinciding with the symmetrical plane of flow chamber 39, longitudinal axis 24 constitutes the central axis of piston 25,26 simultaneously, and above-mentioned symmetrical plane is consistent with the main flow direction 31 in the device A.But, because piston 25,26th, columniform, constriction 6 can be made little rotary oscillation around its central axis 24.In other words, if the obstruction at the beginning in gap 15,16, the pressure in another gap, preferably the pressure in exit passageway 13 or 14 zones will increase.This on a certain sidewall 7 or 8 unbalanced pressure can produce the torque that constriction 6 is rotated around its central axis 24, thereby can increase gap width when the gap is in the blocked process.By in critical stifled zone, increasing gap width, can make and stop up the mediation that becomes.But, importantly, can produce the constant of constriction 26 owing in two gaps 15,16, cause the constant compression force variation, rotate in a small amount, eliminated obstruction, thereby avoided stopping up because of the gap that installation constriction 6 in cylinder 27,28 causes.

Pressure at the fluid that flows in the gap 15,16 acts on the supporting piston 25,26 by lateral openings 43,44.Be provided with near the inner surface 29 of the first piston 25 of master cylinder 20 inner surface 30 greater than another piston 27, in other words, pressure from the fluid that is flowing is being oppressed constriction 6 on the direction of master cylinder 20, promptly, in order to assist the pressure from the medium that is flowing, master cylinder 20 is mostly with back pressure work.In the time of suitably, the damping of pressure form can act on master cylinder 20 opposite side in case damping from the motion of constriction 6.But, owing to flow through upwards that pressure in described second fluid of device A changes and may make constriction 6 produce longitudinal oscillations, also can resist the obstruction in gap 15,16, thereby also need the certain movement free degree of constriction 6 vertical 24 from the back pressure of master cylinder 20.In the time of suitably, device A also can be provided with vibrator, and vibrator is connected in supporting piston 26, and current limiter 6 vertically on work.

According to embodiment, in order to control described second fluid, that is, the flow of pulp suspension, narrower surperficial 48 of the flow media of facing of wedge shape constriction 6 can be extended by the guide way of a protrusion.

Contrasting Fig. 5-7 below describes according to equipment improvement embodiment of the present invention.In Fig. 5 and 6, use identical label to add " ＇ " with corresponding part among Fig. 1-4, in Fig. 7, then add " X ".

Device A ＇ comprises main body or shell 1 ＇, has the first flush end wall, 37 ＇ and the second flush end wall, 38 ＇, at the first and second flush end walls, 37 ＇, a flow chamber 39 ＇ is arranged between 38 ＇, and its general shape is identical with previous embodiment.Device A ＇ by and the similar flange connecting apparatus of previous embodiment be installed between two pipelines, 32 ＇ and 33 ＇.

Be provided with a constriction 6 ＇ in flow chamber 39 ＇, it is by pair of sidewalls 7 ＇ substantially, 8 ＇, the hexahedral shape that crooked diapire 48 ＇ and a curved upper wall 49 ＇ limit.Perhaps, constriction 6 ＇ also can design similarly to previous embodiment.But,, perhaps be suitable for making more close diapire 48 ＇ of central axis 24 ＇ of those (corresponding to the piston 26,27 of control constriction 6 in the previous embodiment) pistons in order under the influence of the fluid that flows through flow chamber 39 ＇, to make constriction 6 ＇ centering.

According to present embodiment, two side 5 ＇ and 10 ＇ of flow chamber 39 ＇ comprise a pair of pair of plate,, are welded in end wall 37 ＇ regularly that is, the outside plate 5A ＇ on 38 ＇, 10A ＇ and be connected in outside plate 5A ＇, the inner panel 5B ＇ of 10A ＇, 10B ＇ by bolt 60 detachables.Between sidewall 7 ＇ and 8 ＇ of two inner panel 5B ＇ and 10B ＇ and constriction 6 ＇, be respectively equipped with gap 15 ＇ and 16 ＇, this mode with previous embodiment is identical.

According to present embodiment, face gap 15 ＇ and the plate 5B ＇ of 16 ＇ and the side of 10B ＇ and be provided with microscler recess or groove 61, flow through gap 15 ＇ so that increase, the turbulent flow of the fluid of 16 ＇, prepare and gap 15 ＇ the mixed effect of second fluid that the described first fluid of 16 ＇ mixes thereby further improve.At every inner panel 5B ＇, the bottom of 10B ＇ is provided with a series of being used for described first fluid introducing gap 15 ＇, hole 18 ＇ of 16 ＇.The back of these holes 18 ＇, at relevant outside plate 5A ＇, 10A ＇ is provided with elongated opening 18A ＇.Outside elongated opening 18A ＇, be respectively equipped with space outerpace 40a ＇ and 40b ＇.The feed pipeline 41a ＇ and the 41b ＇ of described first fluid are connected to said external space 40a ＇ and 40b ＇.

When this specification begins, once mentioned, when steam is sneaked into fluid, can cause disconnected has a rest, violent steam implosion, cause and be jammed and vibrate.For weaken this be jammed and prevent and reduce constriction 6 ' vibration, taked following measure.Each sidewall 7 ＇ of constriction 6 ＇, 8 ＇ are provided with recess 62 at the wall in the face of gap 15 ＇ or 16 ＇.Recess 62 has occupied the major part of described wall, and is covered with the stainless steel thin slice.The recess 62 that is capped can be filled in sand, lead or shot, rubber or other with any material that stops to be jammed as known mode.

The operation of equipment shown in Figure 5 is corresponding to the aforesaid operations of previous embodiment device A, thereby can consult the description of front about operation.

Once mentioned in the description to Fig. 5 embodiment in the above, for the inclination of constriction 6 ＇ among low anti-flow chamber 39 ＇, axis 24 ＇ are preferably towards the front bulkhead 48 ＇ displacements of constriction 6 ＇.The another kind of method of representing effectively to prevent above-mentioned inclination according to the embodiment of Fig. 6.According to this embodiment, two central axis, 24 ＇ of piston 25 ＇ and 26 ＇ and 24 ＇ ＇ are parallel to each other and staggered positions, staggered positions in the vertical plane that they are preferably in the symmetrical plane of constriction 6 ' overlaps.

In the embodiment of Fig. 7, pilot pin 50,51 is used for each piston 25X and 26X, also can be used on both one of on so that prevent the inclination of constriction 6X.Pilot pin 60,61 is parallel with piston axis, is contained in the cylinder shell (not shown) separately.

Have many advantages above the equipment of prior art according to the said equipment A of the present invention, it is simple in structure, compact, is easy to be installed in the existing pipe-line system.Specifically the practice is, for housing apparatus A, only needs cut on two positions in the pipeline of accurate erection unit, suitably by for example flanged joint equipment is connected above-mentioned pipeline 32 and 33 cutting parts corresponding to pipeline then with the pipeline of cutting.Device A need not support or base supports, and this also helps installment work.Another advantage is, main flow, that is, stock suspension flow need not to change its main flow direction by device A, in other words, can keep the high fluid velocity by gap 15,16, this that is to say, institute adds steam or other first fluid will have good distribution in second fluid (pulp suspension), thereby has reduced the risk of implosion.If implosion has still taken place, so also will take place in the downstream, can not cause serious problem.Device A also has an advantage to be, because its structure and installation, constriction vertically and around its longitudinal axis all has certain freedom of motion at it, thereby has prevented clogging effectively.

Claims (19)

1. A device for mixing a first fluid into a second fluid, the device A comprising: - a housing (1) with a second fluid flow chamber (39), - a restrictor (6) in the flow chamber, and - means (18) for introducing said first fluid into at least one gap (15, 16) between the restrictor and those walls (5, 10) of the flow chamber (39) facing the restrictor , characterized by: - the restrictor is substantially wedge-shaped in a plane perpendicular to the main flow direction of said second fluid, and said flow chamber is in the same plane, - there is a gap (15, 16) between each side of the wedge-shaped converging sides of the flow restrictor and those walls of the wedge-shaped flow chamber facing the flow restrictor, and - said means (18) for introducing the first fluid are arranged in the region of the above-mentioned two gaps. 2. The apparatus according to claim 1, characterized in that in the longitudinal direction of the restrictor at right angles to the second fluid in the direction of the main flow, and in the direction linearly coincident but opposite to the direction of the main flow, The restrictors are wedge-shaped and inclined. 3. The device according to claim 1 or 2, characterized in that the wedge-shaped restrictor (6) is arranged so that it can be positioned relative to the housing (1) and thus to the wall facing the restrictor (5, 10) moves along its longitudinal axis (24), ie perpendicular to said main direction, thereby changing the width of said gap (15, 16). 4. Apparatus according to any one of claims 1-3, characterized in that said wedge-shaped restrictors are mounted in supports (27, 28) on both sides of said flow chamber. 5. The device as claimed in claim 4, characterized in that: said supporting member (27, 28) comprises a cylinder with a built-in cylindrical piston (25, 26), the piston of which is connected to both ends of the restrictor, so that the restrictor The flow member is rotatable about its longitudinal axis (24). 6. Device according to any one of claims 1-4, characterized in that the inner side (29, 30) of the support piston (25, 26) facing the restrictor is in contact with the fluid flowing through the device A. 7. The apparatus according to any one of claims 1-6, characterized in that a control cylinder (20) is provided to make the vessel-shaped restrictor (6) movable so as to adjust the gap (15, 16) width. 8. The device according to claim 7, characterized in that the inner surface (29) of the bearing piston (25) arranged closest to the control cylinder (20) is larger than the bearing piston arranged on the other side of the restrictor (26) inner surface. 9. The apparatus according to any one of claims 1-8, characterized in that those walls (5, 10) of the housing (1) facing the restrictor have Holes (18), slots or equivalent introduced into said gaps (15, 16). 10. Device according to claim 9, characterized in that said holes (18) are located closer to the inlets (11, 12) of the gaps (15, 16) than to the outlets (13, 14). 11. Apparatus according to claim 9 or 10, characterized in that the bore has a conical shape in the axial direction calculated from the gap. 12. Apparatus according to any one of claims 1-11, characterized in that said gaps (15, 16) above is relaxed. 13. The device according to any one of the preceding claims, characterized in that it also includes a control device for measuring the pressure difference between the inlet and outlet of the device (A) and the pressure difference between the downstream and the upstream, and according to the measured pressure difference relative to A predetermined value is used to cause displacement of the wedge-shaped restrictor in its longitudinal direction perpendicular to the main direction of the second fluid passing through the apparatus. 14. Device according to any one of claims 1-13, characterized in that at least one of the two surfaces defining the gap (15', 16') between them has an unevenness. 15. Device according to claim 14, characterized in that said unevenness is formed by a longitudinal groove or recess (61) on one of said two surfaces. 16. Device according to claim 15, characterized in that the recess or groove extends in the longitudinal direction of the wall, ie perpendicular to the main direction of the fluid flowing through the gap. 17. The device according to any one of claims 14-16, characterized in that: the surface of the flow chamber (39) and the surface of the restrictor (6') facing the gap are uneven, preferably There are longitudinal recesses or grooves perpendicular to the main flow direction of the fluid. 18. Apparatus according to any one of claims 1-17, characterized in that means are provided to prevent tilting of the restrictor in said flow chamber. 19. The device according to any one of claims 1-18, characterized in that said restrictor (16') is ') is provided with anti-choking devices (62, 63) on the side.

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