KR20110125384A - Two stage mixing dry-polymer solution equipment - Google Patents

Abstract

PURPOSE: A second stage compound polymer dissolution apparatus is provided to improve the dehydrate efficiency of a spin dryer and the cohesion of a setting pond by dissolving powder polymer. CONSTITUTION: A first stage high speed compound system(20) prevents an aggregation phenomenon of powder polymer and blend water. The first stage high speed compound system blends the powder polymer and the blend water into a gel shape. A second stage low speed dissolution system(50a) dissolves high concentration polymer(109a) and diluted water(103a) of the gel shape. A whirlpool inducing pipe is installed between an inflow chamber and a discharge chamber.

Description

Two Stage Mixing Dry-Polymer Solution Equipment

The present invention relates to a two-stage mixed powder polymer dissolving device. Specifically, in order to increase the sedimentation and dewatering efficiency in the sedimentation and dewatering processes of water and wastewater treatment plants, the polymer powder polymer is dissolved and used as a flocculant.

These poorly soluble polymer powder polymers are instantaneously mixed in a high speed in a single stage high speed mixing apparatus to produce a gel mixture of high concentration polymer in the first instantaneous mixture without fisheye, and then transferred to a second stage low speed melting apparatus. The present invention relates to a two-stage mixed powder polymer dissolving device capable of improving the dehydration and sedimentation efficiency and reducing the consumption of flocculant as a low speed dissolving device that uniformly dilutes and dissolves at low concentration without breaking the chain.

In general, sludge is a deposit of fine suspended matter in the water generated during the treatment of purified water, wastewater and wastewater. In order to generate the sludge as described above, a polymer polymer is added to the front end of the sedimentation basin in the chemical treatment method to improve the sedimentation efficiency and the dehydration efficiency before dewatering the concentrated sludge.

The present invention relates to a powder polymer dissolving device for efficiently dissolving a polymer powder polymer which is cheaper than a liquid polymer in water. Generally, dissolving the polymer powder polymer is one of the most difficult techniques in chemical dissolving technology. Since it is about 100 times larger than the particles of the liquid polymer, it has the property of causing fissures and also the polymer swelling time of the powder polymer.

If not initially mixed with high shear force, the size of the particles to be dissolved will increase rapidly, resulting in fissures and damage and cohesiveness of the polymer chain. There is a problem that the drug consumption is increased to decrease.

In order to dissolve the powder polymer as described above, the conventional powder polymer dissolving apparatus hydrolyzes a poorly soluble powder polymer, that is, 0.1 to 1.0 mm in turbulent flow by increasing the spray rate of dilution water by spraying. Powder polymer was mixed with 1 ~ 2.5% high gel-type emulsion and then diluted 1 ~ 2 stage paddle type impeller at high speed in a circular melting tank and diluted to 0.1 ~ 0.5% concentration. And dissolving is applied.

The dissolving apparatus for dissolving the conventional polymer powder polymer as described above is a solid produced by incomplete mixing of the polymer powder polymer particles in order to dissolve the powder polymer by emulsification in the form of 1 to 2.5% high concentration gel within 1 second in the dissolution chamber. A large capacity and high head dilution water supply pump is needed to prevent the occurrence of tangling (Fisheyes), and a blower to prevent the powder polymer from solidifying from external moisture from the screw feeder to the dissolution chamber. And additional equipment such as a heating device, and a very weak polymer chain (breakage force: 1.0 to 10 nN) is damaged or broken by dissolving at high speed (250 to 400 RPM) with a 1-2 stage paddle impeller in a circular melting tank. The efficiency is reduced, and the diameter ratio of paddle type impeller and circular melting tank is very small, 0.2 ~ 0.4, resulting in uneven dissolution Concentration difference of polymer solution according to the circumference occurs around the axis of upper, lower and paddle type impeller of melt tank, and accordingly, power consumption is increased by impeller rotation for a long time, and rotational force is supported by supporting impeller shaft in cantilever type. It has a problem that the shaft diameter is increased to shorten the life of the device and the life of the device is shortened, and only the dilution water exists up to a certain level of the circular melting tank by the paddle-type impeller installation height, and the polymer solution prevents circulation along the paddle-type impeller rotation direction. To this end, three or more baffle plates must be installed inside the circular melting tank. The large-size circular melting tank and the storage tank are installed respectively, so that the cohesiveness of the polymer is remarkably degraded by dissolution and storage for a long time. Chemicals by adding a large amount of polymer A situation easily increased and, a low dehydration and reduction of the efficiency of precipitation and shortened device life and operating efficiency of the facility.

The present invention relates to a two-stage mixed powder polymer dissolving device for solving the above problems, the powder polymer and the mixed water is entangled phenomenon of the powder polymer in the initial wetting process with high shear force by the high-speed rotation of the centrifugal impeller (32) (Fisheryes) prevents the instantaneous mixing and the first stage high speed mixing apparatus 20, the first instantaneous mixed gel-like high concentration polymer (109a) and dilution water (103a) without dead zone It is equipped with a two-stage low-speed dissolving device 50a that enables uniform dilution and dissolution without damaging the polymer chain, and shortens the production time and continuously produces two two-stage low-speed dissolving devices 50a and 50b. It is to provide a two-stage mixed powder polymer dissolving device configured to enable this to reduce the drug consumption.

The first stage high speed mixing device 20 is a screw feeder 12 for conveying the powder polymer, and when the screw feeder 12 is stopped, the screw feeder outlet 13 is blocked by the cylinder 14 to prevent external moisture. By spraying the washing water 108 with the damping plate 15 to prevent the powder polymer in the screw feeder 12 from solidifying, and the washing nozzle 34 installed at a predetermined interval in the upper wet chamber 27. The powder polymer conveyed with a washing apparatus 33 for washing the powdered polymer of fine dust adhered to the inner wall of the wet chamber 28, and a wet chamber inlet 23 for introducing the wet chamber mixed water 107. The lower wet chamber 28, which causes the wet chamber mixed water 107 and the inlet chamber mixed water 106 to be transferred to the lower wet chamber outlet 35, and the centrifugal impeller 32 at the center of the lower wet chamber 28. Centrifugal at a certain angle in the direction opposite to the rotation direction The slant plate 26 which prevents the powder polymer and the wet chamber mixed water 107 introduced into the lower wet chamber 28 by the rotation of the pulverizer 32 circulates only by the whirlwind phenomenon, An inlet chamber 29 having an inlet chamber inlet 24 for introducing an inlet chamber mixed water 106, which is a dilution water necessary for dissolving at a concentration of 2.5%, and a polymer solution disposed in the lower center of the inlet chamber 29; The vortex induction pipe 36, which is allowed to be mixed by the vortex, is installed between the inflow chamber 29 and the dissolution chamber 31, and the polymer solution mixed in the dissolution chamber 31 is combined with the vortex induction pipe 36. A discharging chamber 30 having a discharging chamber inlet 37 and a discharging chamber discharge port 25 so as to be transferred to a discharging chamber inlet 37 and a two-stage low-speed dissolving device 50a so that a polymer solution flows between the center portions of the discharging chamber 30 at the lower end thereof; 31 is installed at the bottom of the polymer solution dissolution chamber (31) A mechanical seal housing 39 composed of a mechanical seal 38 to prevent leakage at the end, a rotary shaft 40 rotated by the high speed motor 22, and a key 41 at the end of the rotary shaft 40. A centrifugal impeller shaft 42, a coupling 43 integrating the rotary shaft 40 and the centrifugal impeller shaft 42, a centrifugal impeller 32 connected to the end of the centrifugal impeller shaft 42, and a centrifugal A bearing housing 45 composed of a bearing 44 which serves to support the impeller 32 at the lower end, and when the high speed motor 22 rotates at 3,450 RPM, a centrifugal impeller installed inside the dissolution chamber 31 ( 32 is rotated at a circumferential speed of 20 m / sec or more, the inlet chamber mixed water 106 and the powdered polymer and wet chamber mixed water 107 introduced into the lower wet chamber 28 are introduced into the inlet chamber 29 and the discharge chamber 30. through the vortex induction pipe (36) provided between the inlet and by a melting chamber 31 within one second shear (G: 15,000 sec ^-1) 1 to 2.5% of the gel to dissolve in a high concentration of gel phase (particle size: 0.1 to 10㎛) so that the powdered polymer particles can be dissolved without solids, ie, fissures, produced by incomplete mixing. 1 stage high speed dissolving device (20),

The two-stage low speed dissolving device 50a is an inclined hollow impeller in which a first instantaneous mixed gel-type high concentration polymer solution 109a of the first stage high speed mixing device 20 is installed at the lower end of the square dissolution tank 51a. (54a) The first instantaneous admixed gel by the polymer inlet pipe 56a installed around the inclined hollow impeller shaft 55a for conveying to the inside, and the square dissolution tank 51a level above the polymer inlet pipe 56a. Seal housing 59 composed of a vent hole 57 for preventing the high concentration polymer solution 109a in the shape from remaining in the polymer inlet pipe 56a, a seal 58 for preventing leakage of the polymer solution, and square melting The corner 60 of the tank has a baffle plate function to prevent the polymer solution from circulating in the rotational direction of the inclined hollow impeller 54a and to transfer the polymer in the upward direction of the rectangular dissolution tank 51a. Essentially in a round tank Uniform dilution and dissolution without the dead zone without baffle plate to be placed, ie concentration difference according to the circumferential distance around the upper, lower and inclined hollow impeller shafts 55a of the square dissolution tank 51a. To the lower end of the square dissolution tank 51a and the lower portion of the square dissolution tank 51a and the diameter ratio of the diameter of the square dissolution tank 51a to the diameter of 0.7 to 0.8 at the lower end of the square dissolution tank 51a. It prevents only the dilution water (103a), and can dilute and dissolve a high concentration of polymer at a large circumferential speed at low power and rotational speed (50 to 100 rpm) where the polymer chain is not damaged. The inclined hollow impeller 54a and the rectangular dissolution tank 51a are characterized by inclining both ends of the impeller upward to inject the polymer solution inside the hollow impeller upward and downward to dissolve them. A motor 53a and a worm reducer 64, which are driving devices installed at the center of the upper base plate 61, a coupling 2 63 for integrating the worm reducer shaft 65 and the inclined hollow impeller shaft 55a; , Installed on the lower base plate 68 of the square melting tank 51a to support the inclined hollow impeller shaft 55a to reduce the shaft diameter of the inclined hollow impeller shaft 55a and ensure mechanical safety to prolong the life of the device. The first instantaneous admixed along the inclined hollow impeller shaft 55a by maintaining a predetermined distance between the bearing 2 (66) and the polymer inlet pipe 56a and the inclined hollow impeller center hole 62 The gel-shaped high concentration polymer solution 109a and the low concentration polymer solution of the square dissolution tank 51a flow into the inclined hollow impeller 54a to be diluted and dissolved, and at the same time, upward from the end of the inclined hollow impeller 54a. The polymer solution is discharged at high circumferential speed To provide a two-stage mixed powder polymer dissolving device having a two-stage low speed dissolving device (50a) which is circulated to the end of the hollow hollow impeller shaft (55a) and the inclined hollow impeller (54a) to enable uniform dilution and dissolution. have.

The present invention for solving the conventional problems is a two-stage mixed powder polymer dissolving device to increase the dissolution efficiency of the polymer powder polymer efficiently dissolving the powder polymer to improve the flocculation efficiency of the sedimentation basin and dehydrator of the dehydrator and the consumption of powder polymer It is effective to reduce the cost, improve the operational efficiency and improve the mechanical durability through continuous production, and to minimize the additional equipment, the expected effect of reducing power and maintenance costs is very high.

1 is an overall system diagram of a two-stage mixed powder polymer dissolving device according to the present invention,
2, the configuration diagram of the first stage high speed mixing apparatus 20 according to the present invention,
(a) is a cross-sectional view of the first stage high speed admixture 20,
(b) is an enlarged view of the cross-sectional "a" part of the one-stage high speed mixing apparatus 20,
(c) is a plan view and a sectional view of the centrifugal impeller 32,
3 is a cutaway perspective view of the two-stage low speed dissolution apparatus (50a, 50b),
4 is a cross-sectional view of two-stage low speed melting apparatuses 50a and 50b,
5 is a detailed view of the inclined hollow impellers 54a and 54b.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed descriptions of related well-known functions or configurations are determined to unnecessarily obscure the subject matter of the present invention, and thus detailed descriptions thereof may be omitted.

The present invention relates to a two-stage mixed powder polymer dissolving device, wherein the square dissolving tank (51a) receives a low water level signal from the water level sensor (52a) installed above the square dissolving tank (51a) of the two-stage low speed dissolving device (50a). After confirming that it is empty, the pump 100 is driven, the dilution water supply valve 101a and the first stage polymer supply valve 102a are opened, and the dilution water 103a is supplied to the square dissolution tank 51a. The motor 53a of the low speed melting device 50a is operated to rotate the inclined hollow impeller 54a at 50 to 100 RPM.

When the inclined hollow impeller 54a rotates, the high speed motor 22 installed in the motor base plate 21 of the first stage high speed mixing device 20 rotates at 3,450 RPM and the mixed water supply valve 104 The inlet chamber mixed water 106 and the wet chamber mixed water 107 are respectively supplied to the inlet chamber inlet 24 and the lower wet chamber inlet 23 of the first stage high speed mixing device 20, and the first stage high speed mixing device When the damp prevention plate 15 installed in the upper wetting chamber 27 of the 20 opens the screw feeder discharge port 13 by the operation of the cylinder 14, the screw feeder motor 11 is operated and supplied for a predetermined time. It is characterized in that the powder polymer stored in the hopper 10 is directly supplied to the lower wet chamber 28 by the screw feeder 12,

The centrifugal impeller installed in the dissolution chamber 31 together with the powder polymer and the wet chamber mixed water 107 and the inlet chamber mixed water 106 supplied to the lower wet chamber 28 of the first stage high speed mixing apparatus 20. The high shear force (G :) is introduced into the dissolution chamber 31 within 1 second through the vortex induction pipe 36 provided between the inflow chamber 29 and the discharge chamber 30 by a centrifugal speed of 20 m / sec or more. 15,000 sec ^-1 ) to dissolve the powdered polymer with 1 ~ 2.5% gel concentration of 1 ~ 2.5% of high concentration (particle size: 0.1 ~ 10㎛) so that the powdered polymer particles are not dissolved in solids, that is, not to be formed by `` Fisheyes ''. Reduce the consumption of powdered polymer,

When the screw feeder motor 11 completes the supply of the powder polymer to the lower wet chamber 28 for the set time, the screw feeder motor 11 is stopped and the damper plate 15 is discharged from the screw feeder outlet by the cylinder 14. It is characterized in that the powder polymer remaining in the screw feeder 12 is prevented from solidifying by external moisture by operating (13) in a normally closed state,

When the screw feeder outlet 13 is blocked, the washing water supply valve 105 is opened to remove the powdered polymer which is scattered on the wall of the lower wet chamber 28 by the free fall in the lower wet chamber 28. Washing water 108 is supplied to the washing device 33 installed in the upper wet chamber 27, and sprays and washes to the inner wall of the lower wet chamber 28, so that the maintenance is convenient.

When the washing water supply valve 105 is opened and closed for several tens of seconds, the mixed water supply valve 104 is closed and the high speed motor 22 is stopped to complete the first high speed mixing process.

In the first stage high speed mixing apparatus 20, the gel-concentrated high concentration polymer 109a of the first instantaneous admixture passes through the inclined hollow impeller shaft 55a of the second stage low speed melting apparatus 50a through the discharge chamber outlet 25. Inclined with the dilution water 103a introduced into the square dissolution tank 51a by the opening of the dilution water supply valve 101a to the lower center of the square dissolution tank 51a through the polymer inlet pipe 56a installed at the center. Dissolved and melted by entering the hollow hollow impeller Center Hole (62) and dissolving tank by spraying upward at a large circumferential speed at low power and rotational speed (50-100 rpm) at both ends of the inclined hollow impeller (54a). The polymer solution therein is circulated from the center of the inclined hollow impeller shaft 55a to both ends of the inclined hollow impeller 54a, thereby allowing uniform dilution and dissolution.

After the dilution water supply valve 101a and the first-stage polymer supply valve 102a are closed by the high water level signal in the water level sensor 52a installed on the upper end of the square dissolution tank 51a of the two-stage low speed dissolution device 50a, the pump 100 is stopped, the motor 53a is stopped after the operation for a few minutes, the process of the two-stage low-speed melting device 50a is completed,

The polymer 110a of the required concentration diluted and dissolved according to the above procedure is opened by opening the two-stage polymer supply valve 111a through the square melting tank outlet 67a provided at the lower side of the square melting tank 51a. When the water level is detected by the water level sensor 52a installed above the rectangular melting tank 51a, the second stage polymer supply valve 111a is closed.

In addition, after receiving the low water level signal of the water level sensor 52b installed on the upper end of the square dissolution tank 51b of the two-stage low speed dissolution device 50b, after confirming that the square dissolution tank 51b is empty, the pump 100 operates. The powder polymer is operated by operating the first stage high speed mixing apparatus 20 and the second stage low speed melting apparatus 50b in the same order as the operation sequence of the first stage high speed mixing apparatus 20 and the second stage low speed melting apparatus 50a. It is characterized in that the continuous production is possible by dissolving the polymer 110b of the required concentration and discharging the polymer 110a of the required concentration in the square dissolution tank 51a of the two-stage low speed dissolving apparatus 50a.

The following is a photograph taken by magnifying a microscope 200 times the dissolved state of the dissolved polymer using a two-stage mixed powder polymer dissolving device and a one-stage powder polymer dissolving device. On the other hand, the formation of entanglement and uneven dissolution were observed, whereas the polymer dissolved in the two-stage mixed powder polymer dissolving device was in a uniform dissolution state, and thus the dissolution method using the two-stage mixed powder polymer dissolving device was confirmed.

In the above, the present invention has been described with reference to the above embodiment, but various modifications can be made within the technical specification of the present invention.

10: feed hopper, 11: screw feeder motor, 12: screw feeder, 13: screw feeder discharge port, 14: cylinder, 15: moisture barrier plate, 20: 1 speed high speed mixing device, 21: motor base plate, 22: high speed motor 23: lower wet chamber inlet, 24: inlet chamber inlet, 25: discharge chamber outlet, 26: inclined plate, 27: upper wet chamber, 28: lower wet chamber, 29: inlet chamber, 30: discharge chamber, 31: dissolution chamber 32: centrifugal impeller, 33: washing device, 34: washing nozzle, 35: lower wet chamber outlet, 36: vortex induction pipe, 37: discharge chamber inlet, 38: Mechanical Seal, 39: Mechanical Seal housing, 40: high speed motor Shaft, 41: key, 42: centrifugal impeller shaft, 43: coupling, 44: bearing, 45: bearing housing, 50a, 50b: two stage low speed melter, 51a, 51b: square melting tank, 52a, 52b: water level sensor , 53a, 53b: motor, 54a, 54b: inclined hollow impeller, 55a, 55b: inclined hollow impeller shaft, 56a, 56b: polymer inlet pipe, 57: vent hole, 58: seal, 59: seal housing, 60: square melting tank edge, 61: upper base plate, 62: inclined hollow impeller center hole, 63: coupling 2, 64: Worm reducer, 65: Worm reducer shaft, 66: Bearings 2, 67a, 67b: Square discharging tank outlet, 68: Lower base plate, 100: Pump, 101a, 101b: Dilution water supply valve, 102a, 102b: 1st stage polymer supply Valve, 103a, 103b: dilution water, 104: mixed water supply valve, 105: washing water supply valve, 106: inlet chamber mixed water, 107: wet chamber mixed water, 108: wash water, 109a, 109b: primary instantaneous mixed gel High concentration polymer solution in shape, 110a, 110b: polymer solution of required concentration, 111a, 111b: two stage polymer supply valve.

Claims (4)

The first stage high speed admixture 20 and the first instant admixed gel form prevent the fishes with instantaneous high shearing force by the high-speed rotation of the polymer powder polymer and the admixture with the high speed rotation of the centrifugal impeller. Increased continuous polymer production and dissolution efficiency by installing one or two two-stage low-speed dissolving devices (50a) in which high concentration polymer (109a) and dilution water (103a) can be uniformly dissolved without dead zone. 2-stage mixed powder polymer dissolving device to reduce chemical consumption. In the one-stage high speed mixing apparatus of claim 1, in order to minimize the auxiliary equipment, the powder polymer is driven directly by the screw feeder motor 11 through the screw feeder outlet 13 through the screw feeder outlet 13 in order to minimize the auxiliary equipment. Moisture to prevent the powder polymer in the screw feeder 12 from solidifying by external moisture by closing the screw feeder outlet 13 when the screw feeder 12 is not operated. Prevention plate 15;
A washing apparatus 33 installed in the upper wet chamber 27 to wash the powder polymer of fine dust adhered to the wall of the lower wet chamber 28;
The powder polymer introduced into the lower wet chamber 28 by the rotation of the centrifugal impeller 32 by being installed at an angle in a direction opposite to the rotational direction of the centrifugal impeller 32 at the center of the lower wet chamber 28 is mixed with the wet chamber. A one-stage high speed mixing apparatus 20 having an inclined plate 26 to prevent the water 107 from rotating only and to cause a tornado to introduce the powder polymer and the wet chamber mixed water 107 into the dissolution chamber 31. ). In the first stage high speed mixing apparatus of claim 1, the inlet chamber mixed water 106 and the wet chamber mixed water 107 through the vortex induction pipe 36 provided between the inlet chamber 29 and the discharge chamber 30. ) And the powder polymer is introduced into the dissolution chamber 31 within 1 second, and the powder polymer is subjected to a high shear force (G: 15,000 sec ^-1 ) at a circumferential speed of 20 m / sec. One-stage high speed with vortex induction pipe (36) which dissolves the powdered polymer without the solids, ie, the fissures, which do not dissolve the powdered polymer particles by mixing with gel-like emulsion (particle size: 0.1 to 10㎛). Admixture 20. 2. The square dissolution tank 51a having a baffle plate function for preventing the polymer solution from circulating in the rotational direction of the inclined hollow impeller 54a in the two-stage low speed dissolution device 50a of claim 1. Wow;
Polymer that is dissolved in the first stage high speed mixing device 20 is concentrated around the inclined hollow impeller shaft 55a installed at the center of the square melting tank 51a and then transferred to the center of the square melting tank 51a. The inlet pipe 56a and the dilution water 103a introduced into the square dissolution tank 51a by the opening of the dilution water supply valve 101a are introduced into the inclined hollow impeller center hole 62 and the inclined hollow impeller ( 54a) The polymer inside the square dissolution tank 51a is diluted and dissolved in the inside, and sprayed upward at a large circumferential speed at both ends of the inclined hollow impeller 54a at low power and rotational speed (50-100 rpm). The solution is circulated from the center of the inclined hollow impeller shaft (55a) to both ends of the inclined hollow impeller (54a) inclined hollow impeller (54a) to uniformly dilute and dissolve a high concentration of the polymer solution.

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