BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In the drawings,
FIG. 1 shows a water-filtering device in accordance with the prior art;
FIG. 2 shows a partial sectional view of the rotatable water treatment device of the embodiment of the present invention;
FIG. 3 shows a top view of the embodiment of the present invention;
FIG. 4 shows an exploded perspective view of two filtering units, two water conducting discs, a hollow shaft and multiple sealing rings;
FIG. 5 shows an exploded perspective view of the filtering unit in FIG. 4;
FIG. 6 shows a partial sectional view of the water-conducting disc, the filtering unit and the sealing ring in FIG. 4;
FIG. 7 shows an assembly sectional view of the filtering unit in FIG. 5;
FIG. 8 shows a sectional view of an interlock between a convex surface and a concave surface for the two water-conducting discs;
FIG. 9 shows a partial sectional view of the filtering unit and two external locked trays, four outside nuts, two bolts and two nuts locked in the hollow shaft;
FIG. 10 shows an assembly side view of the filtering unit located on a water jet device; and
FIG. 11 shows another side view of the filtering unit located on the water jet device.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Reference will now be made in detail to the present preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.
While the specification concludes with claims defining the features of the invention that are regarded as novel, it is believed that the invention will be better understood from a consideration of the following description in conjunction with the figures, in which like reference numerals are carried forward.
Refer to FIG. 2 and FIG. 3. FIG. 2 is a partial sectional view illustrating the rotatable water treatment device of the embodiment of the present invention. FIG. 3 is a top view illustrating the rotatable water treatment device of the embodiment in accordance with FIG. 2.
The rotatable water treatment device is connected with a power unit 100 and includes a raw water treatment tank 110, at least one hollow shaft 120 and multiple filtering units 130. The hollow shafts 120 are arranged in parallel and in the raw water treatment tank 110. In this embodiment, two hollow shafts 120 are illustrated.
Refer to FIG. 3 and FIG. 4. FIG. 4 is an exploded perspective view illustrating two filtering units 130′, two water-conducting discs 170, a hollow shaft 120 and multiple sealing rings 180.
The power unit 100 rotates each of the hollow shafts 120 around its axis L. Each hollow shaft 120 includes an axis hole 121, an external wall 122, an internal wall 123 and a plurality of through holes 124. The axis hole 121 is defined along its axis L. The external wall 122 and the internal wall 123 are defined opposite to each other. The through holes 124 are extended from the external wall 122 to the internal wall 123 to lead the liquid to the axis hole 121.
Refer to FIG. 4 and FIG. 5. FIG. 5 is an exploded perspective view illustrating the filtering unit 130′. Each filtering unit 130′ encircles the hollow shaft 120. Each filtering unit 130′ includes a center hole 131, a supporting net 140, two clipping nets 150, two filtering membranes 160, two water conducting discs 170 and two sealing rings 180. The center hole 131 holds the hollow shaft 120 and communicates to the through holes 124. The clipping nets 150 sandwich the supporting net 140 bilaterally, and the filtering membranes sandwich the clipping nets 150 bilaterally. The two water conducting discs 170 aligns with the center hole 131 and are respectively mounted at two opposite filtering membranes 160. A sealing ring 180 is mounted between the water conducting disc 170 and the filtering membrane 160. The supporting net 140, the clipping nets 150 and the filtering membranes 160 are stacked with each other. The above elements are all in circular form.
Refer to FIG. 5. The supporting net 140 includes an inner ring 146, an outer ring 148, multiple first ribs 141, multiple second ribs 142, a plurality of meshes 143, an opening 144 and a plurality bores 145. The first ribs 141 are formed in a radial arrangement, and the second ribs 142 are formed in a concentric circle arrangement. The second ribs 142 are intercrossed with the first ribs 141 to form the meshes 143. The inner ring 146 forms an opening 144. The bores 145 are arranged on the inner ring 146. The supporting net 140 is made of plastic. In the sectional view of the supporting net 140, the thickness is gradually lessened from the inner ring to the outer ring. Refer to FIG. 4 and FIG. 7. FIG. 7 is an assembly sectional view illustrating the filter unit 130′. The sectional thickness of the second ribs 142 is less than the sectional thickness of the first ribs 141 such that the liquid flows forward to the inner ring 146. Thus, the liquid is conducted to the center hole 131 of the filtering unit 130′ through the bores 145 of the inner ring 146, and then conducted to the axis hole 121 via the through holes 124 of the hollow shaft 120 to complete water-filtering.
Refer to FIG. 5 and FIG. 7. The clipping nets 150 are made of plastic and include numerous frames to form numerous meshes 151. The meshes 151 of the clipping nets are smaller than the meshes 143 of the supporting net 140. The clipping net includes an opening 152 aligning with the opening 144 of the supporting net 140. Furthermore, the clipping net 150 separates the filtering membrane 160 and the supporting net 140 to prevent filtering membrane 160 from sinking to the meshes 143 of the supporting net 140. Thus, the flowing speed during the water-filtering procedure is enhanced. In this embodiment, the filtering membrane 160 is made of polyvinylidene difluoride (PVDF), so called UF membrane. The filtering membrane 160 is provided for the germ (mud) to attach and grow, and the aperture of the filtering membrane 160 is about 0.01-0.04 cm. The filtering membrane 160 also has an opening 161 defined in the center and aligning with the opening 152 of the clipping net 150.
Refer to FIG. 4 and FIG. 7. The external peripheries of the filtering membranes 160, the clipping nets 150 and the supporting net 140 are stacked into one piece (130′) by the high frequency sealing. Thus, a sealing portion 132 occurs in the external periphery and in the internal periphery. The opening 144 of the supporting net 140 is stacked with the opening 152 of the clipping net 150 and the opening 161 of the filtering membrane 160 to form the center hole 131 of the filtering unit 130.
Refer to FIG. 4 and FIG. 6. FIG. 6 is a partial sectional view illustrating the water-conducting disc 170, the filtering substance 130′ and the sealing rings 180. Each of the water-conducting discs 170 includes a body 171, an aperture portion 172, a plurality of water conducting holes 173, a locking portion 174, a joint portion 175, two annular grooves 176 and multiple locking holes 177. The aperture portion 172 aligns with the center hole 131. The water conducting holes 173 are arranged around the aperture portion 172. The locking portion 174 is extended from a disc surface 1712 of the body 171 to the outside, and the 1175 defined inside each of the water conducting holes 173. The two annular grooves 176 are respectively defined on the outer periphery of the disc surface 1711 and the disc surface 1712. The locking holes 177 are alternately defined between the water conducting holes 173. Furthermore, the locking portion 174 has a first section 1741 extended perpendicularly from the disc surface 1712 and a second section 1742 extended perpendicularly from the end of the first section 1741. The second section 1742 engages with the joint portion 175 of another adjacent water conducting disc 170′ (FIG. 8).
Refer to FIG. 6 and FIG. 8. FIG. 8 is a sectional view of an interlock between a convex surface 1751 and a concave surface 1743 for the two water-conducting discs 170 and 170′. The locking portion 174 has a concave surface 1743 located under the second section 1742, and the joint portion 175 has a convex surface 1751 located on the top side. After stacking and assembling the water conducting discs 170 and 170′, the convex surface 1751 of the joint portion 175 engages with the concave surface 1743 of the locking portion 174 to enhance the position effect. The two sealing rings 180 are also set in the two annular grooves 176 of the water conducting discs 170 and 170′ to achieve the water tightness.
Refer to FIG. 3 and FIG. 4. Disposing the water conducting discs 170, the sealing ring 180 and the filtering units 130′ with the hollow shaft 120 in order to assemble the filtering device 130. The adjacent water conducting discs 170 are located in the filtering units 130′ bilaterally and are locked with each other. Accordingly, the filtering unit 130′ between the adjacent water conducting discs 170 is fixed firmly. Repeat the described operating steps so that multiple filtering units 130′ can be located in the hollow shaft 120.
Refer to FIG. 2 and FIG. 3. The hollow shafts 120 are disposed in the raw water treatment tank 110, and a plurality of outer peripheries 133 of the filtering units 130′ are interlaced with each other. When the power unit 100 is forced to rotate the hollow shafts 120, the rotating filtering units 130′ can enhance the turbulent flow effect because of the interlaced outer peripheries 133. Refer to FIG. 3 and FIG. 5. The raw water of the raw water treatment tank 110 are sufficiently stirred because of the turbulent flow effect to reduce the deposited mud on the filtering membrane 160 of the filtering unit 130′. In this way, the drawback of the deposited mud on the vane in accordance with the conventional water filtering device can be solved. The supporting net 140 and the clipping nets are sandwiched between the filtering membranes 160 such that the filtered water is conducted to the hollow shaft 120 to accelerate the filtering. Additionally, the filtering membrane 160 can be prevented from sinking into the meshes 143 of the supporting net 140 caused by the pump effect. Furthermore, the supporting net 140 and the clipping nets 150 can solidify the filtering unit 130′ to resist the swing effect caused by the inertia rotation and enhance the utility.
Refer to FIG. 2. The filtering unit 130′ is located in the raw water treatment tank 110 by the hollow shafts 120. In this embodiment, the rotatable water treatment device can be equal to a membrane bio-reactor (MBR). When the filtering unit 130′ rotates, shear stress acts on the attached mud or dirt on the filtering membrane surface to restrain the growth of the mud attached on the filtering membrane surface. Furthermore, most part of the filtering units 130′ of the filtering unit 130′ are immersed under a liquid level 111, and fewer parts are exposed on the liquid level 111 and in the air. Therefore, two bio reaction zones are provided, the zone on the liquid level is an aerobic zone and another zone under the liquid level is anaerobic zone. When the rotating filtering unit 130′ is in contact with the influent raw water, the microorganisms are attached on the surface of the filtering membrane 160. As the rotation of the filtering unit 130′, the microorganisms act with the oxygen in the air to generate an aerobic process when the raw water is taken to the aerobic zone on the liquid level 111. The raw water also proceeds with the organic biodegradation with the microorganisms attached on the filtering membrane surface and also proceeds with the nitrification process to denitrify. The raw water and the air are taken to the anaerobic zone under the liquid level 111 by the filtering units 130′ to generate an anti-nitrification anaerobic processing to dephosphorize. Thus, the organic contaminant can be cleaned because of this kind of rotation. In addition, the filtering membrane 160 has a portion under the liquid level 111 and without being in contact with the air to be an absolute anaerobic zone. With this absolute anaerobic zone, the loss of the microorganisms mud caused by the shear stress of the rotation of the filtering unit 130′ can be decreased. Besides, organic material with big molecules cannot be biodegraded rapidly and are reserved in the reactor to be decomposed. The location of the filtering membrane 160 immersed in the liquid level 111 can be modified to alter the ratio between the aerobic zone and another zone under the liquid level is the anaerobic zone to improve the concentration polarization.
In this embodiment, the water treatment device is used in the form of the inner type (located in the raw water tank 110), and it can be used in the form of the hang type (located out of the raw water tank 110). Because the structure and the operation between the inner type water treatment device and the hang type water treatment device are identical, there is no more detailed description.
Refer to FIG. 9, FIG. 10 and FIG. 11. FIG. 9 is a partial sectional view illustrating the filtering device 130 and two external locked trays 240, four external nuts 220, two bolts 230 and two nuts 240 locked in the hollow shaft 120. FIG. 10 is an assembly side view illustrating the filtering device 130 located on a water jet device. FIG. 11 is another side view illustrating the filtering device 130 located on the water jet device.
When the water filtering device must be washed, the washing unit is mounted in the water jet device 200 to clean the water filtering device. The water jet device 200 can be used when it is immersed in the raw water treatment tank 110. Multiple external locked trays 210, multiple external nuts 220, multiple bolts 230 and multiple nuts 240 are also used to lock the hollow shaft 120 wherein dual external locked trays 210 are used to fix the filtering device 130. The locking holes 177 of the water conducting disc 170 and the center hole 131 of the filtering unit 130 receive the bolts 230 (refer to FIG. 4). A plurality of sealing rings 250 are set in the apertures 211 of the external locked trays 210 to prevent water leakage. As a result, the rotating filtering device 130 can be washed by the ejected water 202 from the bilateral water pipes 201. Therefore, the mud attached on the surface of the filtering unit 130′ can be removed such that the filtering unit 130′ can be reused without replacing or demounting to wash.
According to the composition and the embodiments above, there are many advantages of the rotatable water treatment device of the present invention, such as:
1. The supporting net 140 and the clipping nets 150 are sandwiched between the filtering membranes 160 such that the filtered liquid is conducted to the hollow shaft 120 rapidly. As a result, the filtering membrane 160 can be prevented from sinking into the meshes 143 of the supporting net 140 with the pump effect.
2. Furthermore, the supporting net 140 and the clipping nets 150 between the filtering membranes 160 can solidify the filtering unit 130 to resist the swing effect cause by the inertia rotation. The shear stress caused by the filtering unit 130 and the liquid level 111 during rotation can remove the mud attached on the surface of the filtering membranes 160 such that an automatic cleaning effect is generated to enhance the utilization.
3. The filtering units 130′ are set in the raw water treatment tank 110 and are stacked and interlaced with each other. Hence, a fierce turbulent flow effect is provided to stir the raw water in the raw water treatment tank 110 when the hollow shafts 120 are rotated. In this way, the attached mud on the filtering membrane 160 of the filtering unit 130′ is reduced, so the conventional drawback of the adhered mud on the architecture can be improved.
4. The water treatment device can be applied with the water jet device 200 to clean the filtering membranes 160 of the filtering units 130′ when the hollow shaft 120 rotates. Consequently, the using period is extended.
Although the present invention has been described in considerable detail with reference to certain preferred embodiments thereof, other embodiments are possible. Therefore, their spirit and scope of the appended claims should no be limited to the description of the preferred embodiments container herein.
It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims and their equivalents.
Patent Application
20080073264
