JPS6094309A - Mixing and supplying device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates generally to devices for mixing two liquids, and more particularly to devices for mixing viscous liquid polymers with water to provide diluted polymers for use in water treatment reservoirs.

Polymers are commonly used in water treatment equipment to remove solids suspended in water. Polymers 1σJ, sometimes called polyelectrolytes, carry an electrostatic charge that attracts particles suspended in water. Virtually all solids have a negative or positive charge and are therefore attracted to these polymers. Polymers are extremely large with millions of charge sites that attract suspended particles.

Polymers are available in dry or liquid form.

Dry polymers are inert because the molecules are wound.

Although wheel coalescence is less expensive than liquid polymers, it requires complex and expensive equipment to convert into an active liquid state. The liquid polymer may be highly concentrated, containing 75-30% active polymer, where the molecules are only partially unwound. Concentrated liquid polymers are prepared from dry polymers in chemical processing glands under harsh conditions using expensive equipment. These chemical processing plants can provide polymers at any selected concentration.

The more dilute the polymer, the shorter its service life. Dry polymers last indefinitely, concentrated liquid polymers last for months, and polymers diluted to a concentration of a few centimeters deteriorate or deteriorate in a matter of days.

The last form is most effective for water treatment because the molecules are sufficiently unwound to provide the maximum number of charge sites for attracting particles suspended in the water to be treated.

However, such diluted polymers lose much of their effectiveness during transportation and storage. It is therefore advantageous to transport the concentrated polymer to a water treatment plant location, where a mixing device is provided to dilute the polymer, e.g. to produce as much diluted polymer as is required each day. .

However, in its diluted state, the unwound polymer is weak and the chains are easily broken.

Polymers do not mix easily with water, so they are not easy to dilute.

Currently, the concentrated polymer is put into a drum and processed at processing stage 01.
1, and is transferred using a hegyabong into a mixing tank containing water and gold. Giyapa? There are times when the pump damages the concentrated polymer. To mix water and polymer,
A mixer is used within the tank. A metering pump supplies diluted polymer to the water to be treated. The price of such a system is in the range ss, ooo to sso, oθ0.

Mixers tend to create high shear, breaking weak polymer chains and coagulating them together. The mixer is small relative to the size of the mixing tank and produces a highly localized mixing action, so the resulting product is not very uniform. It is also not easy to precisely control the concentration in the water to match the concentration specified by the polymer manufacturer to provide optimal water treatment. Still, such devices make it difficult to produce the same depth from punch to punch. Puya Ponzo is complex and high fill
ii The use of a variable speed drive does not allow for the flow rate of concentrated polymer into the tank to be adjusted.

Generally, conventional polymer delivery systems are expensive to purchase and operate, require frequent maintenance, and do not provide a satisfactory product.

Therefore, an important object of the present invention is to provide a mixing device capable of homogeneously mixing λ liquids to a selected concentration at reduced cost.

It is a further object of the present invention to provide a mixing and dispensing device for mixing concentrated polymer with water while minimizing shearing effects on the polymer.

It is a further object of the present invention to provide a mixing and dispensing device that allows for precise control over the repeated production of diluted polymers to desired concentrations.

It is a further object of the present invention to provide a mixing feed device that supplies diluted polymer continuously rather than in a pulsatile manner.

Briefly, the mixing and dispensing device according to the invention for mixing and dispensing two liquids includes: a container defining a substantially cylindrical chamber; an axis of the cylinder; i+II
a chamber with a given cross-sectional area through the line; a first inlet device of the reservoir for conveying one of the liquids into the chamber; a second inlet device for conveying the local liquid into the chamber; an outlet device for conveying the liquid from the container; an impeller mechanism mounted in the chamber for rotation about a cylindrical line, the impeller mechanism extending over at least half of the cross-section of the chamber; an in-cover mechanism comprising both numbers of fins having combined surface areas and disposed closely adjacent the nozzle arrangement; and an arrangement for rotating the impeller arrangement. There is.

The invention resides in a number of novel features and combinations of parts hereinafter described in detail, shown in the accompanying drawings, and particularly pointed out in the claims. It will be understood that various changes may be made in detail without departing from the spirit of the invention or sacrificing its advantages.

To facilitate understanding of the invention, preferred embodiments thereof are shown in the accompanying drawings. The present invention, its structure, operation, and many advantages will be readily understood when the accompanying drawings are considered in conjunction with the following description.

This will be explained with reference to the attached drawings. 1 to ≠, a mixing and dispensing device incorporating features of the invention is shown with reference numeral 10.
This is shown in its entirety. The apparatus 10 is used with a drum containing concentrated polymer and a water source. The apparatus 10 draws polymer from a drum, receives water from a source, mixes the polymer and water, and provides the desired 6 degree uniformly diluted polymer.

As seen in FIG. 1, the mixing and feeding device 10 has a frame 11 with a U-shaped cross section. The frame 11 has a front panel 12 and a rear panel 13. The bottoms of panels 12 and 13 are bent inward and attached to a roughly square base 14. - ≠ one leg 15 of the set is / mother panel 12
and 13 are attached to the inwardly bent flanges.

The mixing and feeding device 10 includes a polymer feeding mechanism 2o, the basic element of which is a non-gear type pump 21. Pump 21 includes a completely enclosed pump drive with no exposed moving parts and is capable of moving highly viscous materials such as expanded liquid polymers. The output of the pump is pulsating to provide a means of accurately regulating the delivery rate. The bong 7'21 has an end or head 22 adapted for pumping especially viscous polymers. An embodiment of the mixing supply device 1o is a pump manufactured by Refuid Metrox, Inc. of Acton, Massachusetts, specifically its Model A/
//-Incorporated 6 pumps. What is this pump?
psl, (Yotsu 2 to 9 / ctrt2) (D pressure per hour θ: 0.2 Caloy (0,07s7t) ~ / Galois (3,7st) to enable selection of polymer flow rate This pump has adjustable stroke length and stroke length.

- It has a clock cycle and operates with AC / / 3 ry silt.

The head 22 has an inlet fitting 23 for connection via a tubing to a drum or tank (not shown) containing undiluted or neat monopolymer. The head 22 also has an outlet fitting 24 coupled to one end of a tube 25 and the other end of the tube 25 to a fitting 26. For purposes of preparation, the nozzle 27 may be incorporated into the head 22. The period of the stroke is controlled by knob 28 and the length of the stroke is controlled by knob 29. The period is adjustable from ≠ to 100 movements per minute, and each stroke is 0
．． 63cc, moving. Knob 29 establishes the length of the stroke at any point between 10% and /θ0% of the maximum stroke length. It is preferable that the length of the stroke is greater than or equal to the maximum value jθ.

The mixing supply device 10 further includes a water supply mechanism 30 having an inlet opening 31 for coupling to a water supply. A fitting 32 couples the artificial opening 31 to a normally closed solenoid valve 33. As soon as power is coupled to device 10 , valve 33 opens and water flows through tube 34 to flow meter 35 . The embodiment incorporates a flow meter 35 manufactured by Dwyer Instruments, Inc., Michigan City, Indiana. That is O~/θ0 Galois C37g per hour! ;t) has a knob 36tl- for controlling the water flow rate;

The apparatus 10 further includes a mixer 40 , the mixer 4
0 details are best seen in FIGS. 5-7. Mixer 40 has a cylindrical container 41 bounded by a generally cylindrical body 42 and square top and bottom walls 43 and 44, respectively. The body 42 is preferably made of transparent acrylic resin so that an operator can see inside the container 41 and see if any malfunction has occurred. The bottom of the top wall 43 and the top of the bottom wall 44 have a circular groove with a diameter equal to the diameter of the body 42 and receive the OIJ song 5 therein. The end of the barrel 42 is placed in the groove in contact with the O-ring 45. The top wall 43 has a set of wide holes 46 arranged near the corners and centered vertically with the same set of wide holes 46 in the bottom wall 44. A set of ≠ rods 47 with threaded ends are
The washers 4 are respectively arranged in pairs of vertically centered holes.
8 and a nut 49, which compresses the cup 5 to form a liquid-tight chamber 50 inside the container 41.

A nozzle 55 is arranged inside the chamber 50, and the nozzle 55 is
It is actually a short length of tube 56 with one end closed by a plug 57 and a slit 58 in the side wall. In an embodiment, slit 58 has a rounded end tube and is 17 inches (3/, 7 j
mm). The other end of tube 56 has a reduced diameter and fits into a vertically oriented hole 59 in bottom @44. The pores 59 are the artificial pores 60 of the polymer and the artificial pores 6 of the water.
1, both artificial holes 60°61 are oriented horizontally. Drain holes 63 in bottom wall 44 are also horizontally oriented;
The axis of the drain hole 63 is perpendicular to the axes of the holes 60 and 61;
It communicates with holes 60, 61 and 59. holes 60 and 63
The outer end of is threaded and the hole 63 is closed with a plug 64. The top wall 43 has an L-shaped exit hole 65;
The long side of the L-shape is horizontal and the short side is vertical, and the exit hole 65 communicates with the chamber 50. An outlet fitting 66 (FIGS. 7 and 3) is provided in the hole 65.

The inlet of flow meter 30 is coupled to tube 34 and the outlet is connected to inlet hole 6
1. The water thus flows through the flowmeter 35, through the hole 61 to the hole 59, and then through the nozzle 55 and upwardly into the chamber, exiting into the chamber in a vertically oriented sheet. The concentrated polymer is poured into hole 6 by a ponder.
0 into hole 59 where it flows vertically through nozzle 55 and exits into chamber 50 in the form of a vertically oriented sheet.

Mixer 40 also includes an in-two mechanism 70 for mixing liquid introduced into chamber 50. Inn 4
2 mechanism 70 has ≠ slat-like fins 71, each fin at a right angle with respect to its adjacent fin. The in-covering mechanism 70 has a bottom can f72,
The bottom cassog has a set of ≠ radially extending mutually perpendicular grooves. The top cap 73 has a set of ≠ radially extending grooves that are each aligned with the grooves of the bottom character f72. The pairs of vertically aligned grooves receive the wide fins 71, respectively. An axis 74 extends through the centers of characters f72 and 73. Each gap 72 and 73 has a radially extending hole 75 disposed therein with a set screw for attaching the end cap to the shaft 74. The bottom cap 72 has a vertically extending hole 76 for receiving the lower end of the shaft 74 and the top cap 73 has a vertically extending hole 76 for receiving the lower end of the shaft 74.
4 has a hole 77 for receiving the upper end of the tube. Enlarged portions 78a and 78b at opposite ends of hole 77 in top cat f73 receive a bearing 80 and a mechanical seal, respectively, in which the upper end of shaft 74 is pivoted. The impeller mechanism 70 is therefore mounted within the container 41 for rotation about a vertical @ line.

The mixing supply device IO further includes a drive mechanism 90 for rotating the impeller mechanism 70. 1 to 1, the drive mechanism 90 has a motor 91 added to the front tunnel 12 adjacent to its upper end. In the embodiment, the motor 91 produced //2 horsepower at 70 θ revolutions per minute. The impeller mechanism 70 of the motor 91 operates at a speed of 6 per minute.
It was geared down to run at 00 rpm. motor 9
1 carries a toothed pulley 92 aligned with a toothed pulley 93 on the shaft 74 of the inboard machine m70. so that the shaft 74 is rotated by the operation of the motor 91;
A toothed belt 94 engages toothed pulleys 92,93. The belt 94 is protected by a guard 95. Power for the motor 91 is taken by wires in a conduit 97 coupled to a switch box 98 having a switch 99.

A tube connects an outlet fitting 66 where the diluted polymer is utilized. For example, it is contemplated that a drum of concentrated polymer and a mixing feed device are placed next to a device for feeding diluted polymer to the water to be treated. Cord 100 provides power to switch box 98 via a plug 101 inserted into an electrical receptacle, such as a wall outlet. Cord 102 supplies power to pump 21 .

During operation, the mixing feed device 10 is placed in close proximity to the drum of concentrated polymer. The concentrated polymer may be highly viscous. A tube connected to fitting 23 is inserted into the polymer. The water source is connected to population 31. When plug 101 is inserted into the wall outlet, lunoid valve 33 is automatically opened and water is supplied to flow meter 35 regardless of the condition of switch 99. Therefore, the water immediately flows to the flow meter 3.
5 into the chamber 50, filling the chamber 50 and exiting the outlet hole 65.
and exits into the water treatment equipment through a pipe joint 66. The output of the bomb f21 is pulsating so as to accurately control the rate of supply of the polymer to the mixing supply device 10. However, the flow of water is continuous. Because the amount of pulsating polymer is small compared to the continuous water flow rate, eg, less than 2 inches, the output of the mixing feed device 10 is substantially continuous. As a result of the combination of the mixing action in the mixing chamber and the retention time in the mixing chamber of at least 30 seconds, there is no measurable change in the concentration of the polymer in successive outputs.

Turning on switch 99 energizes pump 21 to draw concentrated polymer from the drum and move it through tube 25 and hole 60 and into nozzle 55 . The condensed polymer exits the nozzle 55 together with the water through the slit 58 in the form of a vertically oriented sheet. The desired concentration of the resulting product is determined by selecting the polymer and water flow rates. In the case of polymers,
Knobs 28 and 29 are adjusted, and in the case of water, knob 36 is adjusted. Switch 99 also supplies energy to motor 91 and operates impeller mechanism 70 . fin 71
acts like a paddle wheel to mix the concentrated polymer with water to provide a diluted polymer, which is passed through the outlet hole 65.
Exit room 50 through.

The time that water and polymer are retained within container 41 is important. If the holding time is too long, the polymer will be exposed to the shear generated by the impeller machine 4#7o during the extra time and the polymer will lose effectiveness. However, if the holding time is too short, the polymer will not have a chance to unwind sufficiently to be effective. The preferred range of retention times was determined to be between 30 seconds and 7 minutes.

In a preferred embodiment, the 8 volumes of container 41 were 8 volumes capable of holding 1/4 gallon (3,7 St) of liquid. The flow rate of water is between 10 and 100 gallons (37,f) per hour.
, 5' to 37g:St>. At a flow rate of 100 gallons per hour (371,!;t), the retention time is 36 seconds (/gal x 60 minutes/hour x 60 seconds/minute ÷ 1
0θ galono/hour). 10 gallons per hour (3ZdoS
At a flow rate of t), the retention time was 6 minutes.

In order not to damage the long molecules of the polymer, the mixing supply device 1
0 provides high torque and low shear within the mixing chamber 50. High torque is generated by a powerful motor 91.

The low shear is due to the paddle wheel effect (paddl) of the impeller mechanism 70.
e wheel effect). In other words, the total surface area of the fins 71 is ≠ the vertical fFf axis of the mixing chamber, that is, the cylinder ! It is substantially comparable to the cross-sectional area of the mixing chamber measured through line III. In an advantageous embodiment, the height of the mixing chamber 50 is 70 inches (,2J, lI
Lα) and its diameter is 3-5 inches (/3.ri7t:
yrt ), therefore through the cylinder's horizontal line 1ii
The determined cross-sectional area was 12 inches below. In this same embodiment, each fin 71 has 7.7! ;inch(/gAfJ'c!r
L) height and /, 2.5' inches C3, /7! ;cm
), or an area of 9.7 square inches (2.3 It x 2). ≠The total surface area of this fin is 3 inches C, 2! ;0.33 solder2), which is about 70% of the cross-sectional area of the torture chamber 50. To achieve the desired paddle wheel effect, the total surface area of the fins should be at least 5OfJ of the cross-sectional area of chamber 50.

To further avoid damage to the polymer, all surfaces within the mixing chamber 50 are carefully deburred and made as smooth as possible.

Another critical aspect of the invention is the contour of the fluid exiting the nozzle 55 and the in-? In close proximity to the ridge 91' 70. As previously mentioned, the water and polymer exit nozzle 55 in a vertical sheet having a length equal to the length of slit 58. As best seen in FIGS. 6 and 7, the sheet leaving the nozzle immediately rotates into the fin 7.
1, the nozzle 55 is in R2 machine drawing 7
very close to 0. The high velocity of the sheet exiting the nozzle, together with the velocity of the impeller mechanism 70, repels the material by 1°.Although the polymer was encapsulated in the shell of the oil droplet, the impeller mechanism 70 effectively repulses the oil droplet. This creates conditions for the polymer to flow out and be stretched. As the fluids are mixed, the polymer becomes increasingly wetter and more concentrated. In the embodiment described above, the distance between the vertical edges of the co-planar fins 71 is approximately 3, J-inch CIi crll), and the velocity of this vertical edge is approximately 10 inches per second (. )C
3,! ;ia 'I'-X tr X 'θOrp+r
/60) Tea Tsuta.

Figures g and 2 show a nearly horizontal reverse mixing blade 110
An alternative embodiment is shown in which the vanes 110 are preferably integral with the body 42.

The vanes 110 are inwardly directed and have curved vertical components as seen in the second figure. These vanes force the liquid material downward, increasing the time the liquid material is in the mixer t40, thereby improving the uniformity of the diluted polymer exiting the exit hole 65. Preferably, it is located midway between the top wall 43 and the bottom wall 42.

A second embodiment of the invention, shown in FIGS. 1θ-1 and 2, shows a different bottom wall 110 replacing the bottom wall 44 of the first embodiment. The pond elements of the device 10 other than the nozzle 55 are also employed in the second embodiment,
Fins 71 are shown in phantom. The wall 110 is square and has a circular groove 111 on its top surface with a diameter equal to the diameter of the body 42 and receives an O-ring 45 (FIG. 5) in the circular groove 111. The lower end of the body 42 is 0
It is disposed in the groove 111 in contact with the ring 45 .

The bottom wall 110 has a set of holes 112 located near the corners and centered perpendicularly to the holes 46 in the top wall 43 . Two rods 47 are placed in each instep of the holes 112 and held in place by washers 48 and nuts 49 (Hxj), which compress the O-rings to define a fluid-tight chamber. The wall 1, which is preferably formed from hardened glass,
A pair of L-shaped holes 113 and 114 are formed in 10,
Hole 113 is threaded and hole 114 is unthreaded. The longer legs of the holes 1i3, 114 are aligned horizontally in common axis alignment. Hole 1j3,
The shorter legs of 114 are aligned vertically and have nearly parallel Gb lines. The pores 113 constitute a population of the polymer;
The artificial hole 60 is connected by the method described in the first aesthetic embodiment. The hole 114 is connected to a water source in the same way as the artificial hole 61 of the seventh embodiment.

A check valve 116 is screwed into the short leg of the L-shaped hole 113. In practice, the check valve 116 was supplied by Circle Seal Corporation of Anaheim, California.

This check valve 116 has good resistance to polymer flowing therethrough. The check valve 116 allows the polymer to enter the mixing chamber 50 (Fig.
When turned off, liquid is prevented from flowing back to the source of the polymer. @110 has a hole 120 like hole 76 in the first embodiment.

Further, the wall 110 has a hole 121, and the axis of the hole 121 is
It is perpendicular to the axes of the holes 113 and 114, and the hole 121 is
It is closed at 22. The L-shaped hole 121 constitutes a device for entering the third liquid or a drainage opening, as in the first embodiment.

The crimped polymer is forced through hole 113 and check valve 116i by bong 7621 (FIG. 1).

In this way, the polymer enters the mixing chamber in the form of a 4Iη direct jet or jet. Similarly, water flows in a vertical jet or jet through the holes 114 and then through the check valve 116. These jets have axes that are approximately parallel to the axis of rotation of the impeller 70 (FIG. 3).

An important aspect of the invention is that the polymer exiting the valve 116 is immediately adjacent to the impeller mechanism 70 so that the polymer is immediately struck by the rotating fins 71. fin 7
The distance between the outer edge of 1 and the polymer jet is as small as possible within the dictates of normal manufacturing tolerances.

The mixing feed device described above is therefore capable of mixing concentrated polymer with water to provide a continuous flow of uniform diluted polymer that is not damaged during the mixing action.

[Brief explanation of the drawing]

FIG. 1 is a rear elevational view of a mixing and dispensing apparatus incorporating features of the present invention. FIG. 2 is a side elevational view of the mixing and feeding device. FIG. 3 is a front elevational view of the mixing and feeding device. Figure ≠ is a top plan view of the mixing supply device. FIG. 5 is an exploded view of a portion of the mixer of the mixing and feeding device. FIG. 6 is an enlarged vertical cross-sectional view of the mixer portion of the mixing and dispensing device without the outlet fitting and drain plug, taken along line 6--6 of FIG. 2 in the direction of the arrow; FIG. 7 is a horizontal sectional view taken along line 7-7 in FIG. 6 in the direction of the arrow. Figure 7 is similar to Figure 7, but is a reduced view.
A back-mixing vane is shown. Figure 2 is a reduced partial elevation of the mixer showing the back-mixing vanes. FIG. 70 shows the ! of the present invention. Figure 3 is a plan view of a bottom wall for use in an embodiment, with fins shown in phantom; FIG. 1 is a vertical sectional view taken along line 11-11 in FIG. 70 in the direction of the arrow. 7.2 is a partial cross-sectional view taken along line 12-12 of FIG. 10 in the direction of the arrow. DESCRIPTION OF SYMBOLS 10... Mixing supply device, 11... Frame, 41... Container, 60... Polymer artificial hole, 60... Inlet hole, 65... Outlet hole, 70... Impeller Mechanism, 71・l fin, 55... nozzle, 58...-slint- 56... pipe, 116... check valve, 110... reverse mixing vane〇

Claims (1)

[Scope of Claims] A. In a mixing supply device for receiving polymer and water, activating and diluting the polymer = with a frame; mounted on said frame and forming a substantially cylindrical chamber therein; a container for transporting the polymer into the chamber, the chamber having a cylindrical axis and a given cross-sectional area through the cylindrical axis; a polymer prosthesis device for conveying the polymer to the chamber; a device mounted on said frame for precisely adjusting the rate of water supply; a water inlet device for conveying water to said chamber; said polymeric water device and said water inlet device each comprising a polymeric and a device mounted on the frame for controlling the flow of water into the chamber; and a device mounted on the frame for controlling the flow of water into the chamber; an outlet device for conveying the combined material from said container; an impeller mechanism mounted in said chamber for rotation about a cylindrical axis for mixing polymer and water; A mixing and feeding device comprising: an impeller mechanism having a plurality of fins having a combined surface area of l; and a device for rotating said impeller mechanism. 2. Said polymeric prosthesis device so as to allow polymer to flow into said chamber, but prevent either polymer or water from flowing out of said chamber through said polymeric prosthesis device. 2. The mixing and dispensing device of claim 1, further comprising a check valve in communication with a passageway associated with the mixing and dispensing device. 3. The mixing and feeding device of claim 1, wherein the water inlet device is in direct communication with the chamber. The inlet device for at least one of the polymer or the water comprises a nozzle, said nozzle being a tube with an outlet opening such as a slit, the one of the polymer or the water being directed in a sorted manner. A mixing and feeding device according to claim 1, characterized in that the mixing and feeding device enters the chamber through the nozzle. Left The mixing and feeding device according to claim 1, wherein the elongated direction of the slit is parallel to the rotation axis of the impeller mechanism. B. The mixing supply device according to claim 1, characterized by a plurality of reverse mixing blades of the container arranged in the chamber. Z. The mixing and feeding device according to claim 6, wherein the back-mixing vane is arranged midway between both ends of the cylindrical chamber.