CN1049164C

CN1049164C - Dewatering system

Info

Publication number: CN1049164C
Application number: CN95115351A
Authority: CN
Inventors: 唐纳德·M·迈罗; 帕特里克·J·芬恩
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-08-14
Filing date: 1995-08-14
Publication date: 2000-02-09
Anticipated expiration: 2015-08-14
Also published as: CN1142990A

Abstract

The present invention relates to an apparatus for dewatering sludge in a flotation tank. The apparatus comprises a conveyor 40, wherein the conveyor 40 has an upper stream part 42 which can be used for receiving the sludge falling from an edge wall 32, and a down stream part 44. The conveyor preferably forms an oblique angle with the horizontal surface, the down stream part is higher than the upper stream part, a water tank is arranged below the conveyor to be used for discharging liquid to flow into a water pump 74, and the liquid is conveyed back to the floatation tank along a water return pipe 80. The conveyor comprises a long shaft 50 and a screw 54, wherein the screw is fixed to the shaft; the screw has an upper stream screw part 55 with a big diameter and a down stream screw part 62 with a small diameter; the upper stream screw part is used for receiving the fallen sludge, and the down stream screw part is sealed to extrude the sludge.

Description

Make the equipment of liquid and separation of particles

The present invention relates to dehydration equipment, particularly make the equipment of liquid and separation of particles.

The mixture that mainly contains liquid and particulate of waste water and so on can flow in the groove and carry out preliminary treatment with a large amount of micro air bubbles, makes majority of particles float to liquid level.Skim particulate and they are bonded together from liquid level then and form slag mud, this slag mud drops on the conveyer and is transported.A kind of system that comes to this shown in No. 5,091,083, our previous patent.In case slag mud is transferred machine and transports to outside the groove, just be pumped into usually in the de-watering apparatus, thereby remove nearly all moisture by extruding.Slag mud just can be disposed effectively like this, and for example the solarization dry doubling is used for making construction material or is eliminated under the sun.The high pump of efficient with slag mud when conveyer is displaced into final dehydration equipment, its rotating vane can be smashed slag mud.Before the slag mud final dewatering of dispatch, in slag mud, add some polymer and make its regelation.Though need only in slag mud, add 1,000,000/to ten thousand/ polymer, polymer cost height (for example 3 dollars every pound are closed 6.6 dollars of per kilograms).Therefore cost is low, takes up an area of for a short time, and it will be of great value not needing the dehydration equipment of pump dispatch slag mud.

According to one embodiment of the present of invention, the equipment of liquid and separation of particles is used in such system, this system skims and makes it to fall floating particulate or slag mud, takes away slag mud then and makes its dehydration with effective and efficient manner.This equipment has a liquid and particle mixture injects its interior flotation cell, remove floating particulate with one and fall into the particulate of piece or the device of slag mud in the position, whereabouts, described device has a conveyer, this conveyer has one and is located substantially on below, position, described whereabouts in order to accept the upstream portion of described slag mud, the slag mud that moves along described conveyer with an extruding is so that remove the wherein downstream portion of moisture, and it is characterized by: described conveyer has: a major axis; One is connected and makes the motor of its rotation with described axle; One is located at the below of position, described whereabouts basically and is fixed on the upstream spire with first average diameter on the described axle; One is located at the downstream of described upstream spire and is fixed on downstream spire on the described axle, described downstream spire have one than the little average diameter of described upstream spire so that extruding slag mud; And tank that is used for accepting and drains the liquid that comes out from the slag mud extruding of the downstream portion of described conveyer.Conveyer preferably becomes the inclination angle with horizontal plane and stretches, and the position of downstream portion is higher than upstream portion, and is provided with a tank so that drain the water that flows down along the inclined-plane below conveyer.The water of draining preferably again with the upstream extremity that is pumped back to flotation cell so that mix with original liquid and particle mixture.Have a case to surround the major part of major diameter spire, just reserve a unlimited top so that accept slag mud, the downstream spire of minor diameter is then fully besieged so that slag mud can be extruded thereon basically.

After the explanation below reading in conjunction with the accompanying drawings, can have a better understanding to the present invention.

Fig. 1 is the isometric view with the equipment of liquid and separation of particles.

Fig. 2 is the profile of the equipment of Fig. 1.

Fig. 3 is the profile of the equipment of Fig. 2.

Fig. 4 is the profile of the pump of Fig. 3.

Fig. 5 is the profile of a part of the conveyer of Fig. 3.

Fig. 6 is the part isometric view of the conveyer of Fig. 2.

Fig. 7 is the part sectioned view according to the conveyer of another embodiment of the present invention structure.

Fig. 8 is for pressing the view of 8-8 line intercepting among Fig. 7.

Fig. 1 illustrates the equipment that is used for liquid and separation of particles.Liquid of waste water and so on and particle mixture are pumped in the flotation cell 12 by the import 14 of opening to little case 16.Bubble generator 20 produces a large amount of micro air bubbles at little lower box part, and these bubbles upwards flow in the remainder of trough by little case with mixture.Bubble adhesion is on the particulate and they are floated on the surface 22 of pond liquid 24.Skimming equipment 26 has rubber tree leaf 28, can skim or sweep to scrape floating particulate on the whole and make them outside beach plate 30 moves to edge wall 32.Also can adopt other skimming tools, but all similarly make particulate on edge wall limit or just in time fall on the position, whereabouts outside edge wall 32.One conveyer 40 is located at the below of the position, whereabouts that is formed by edge wall 32 so that accept particulate.From the teeth outwards floating and sweep the particulate trend of scraping along the beach plate and adhere to each other and become slag mud, the slag mud that therefore contains big quantity of fluid falls on conveyer 40.

Conveyer 40 has one to be positioned at the upstream portion 42 of 32 belows, position, whereabouts so that accept into the particulate or the slag mud of piece.Conveyer 40 also has a downstream 44, can push the slag mud that moves along conveyer and remove wherein moisture.As shown in Figure 2, conveyer is provided with a water horizontal stroke 70 and can accepts and drain the water that water in the slag mud that moves along upstream portion 42 and slag mud are extruded out when the downstream portion 44 along conveyer moves.

As shown in Figure 2, conveyer 40 is provided with a major axis 50, is driven rotation by gear motor 52.Conveyer also has a spire or auger conveyor 54, the upstream portion 55 that to have an average diameter on it be A.The upstream spire is positioned within the part 56 that has open-top on the conveyer case 60.The setting of open-top makes it can accept the slag mud that falls from the position, whereabouts of edge wall 32.Conveyer also comprises a downstream spire 62 with less average diameter B, also is fixed on the axle 50.The downstream case portion 64 of case finishes (being 360 ° substantially) basically and surrounds downstream spire 62 so that the effusion of restriction slag mud.Then can there be unlimited top in upstream case portion 56, though because because the mild agitation of upstream spire is slightly dewatered slag mud, slag mud be not pressed poor.Downstream case portion 64 then palpus surrounds spire fully in order to avoid the slag mud that is extruded is overflowed.

The case 70 of conveyer 40 also constitutes a tank 70, and this tank is located at the below around the case portion 71 of spiral bottom, makes liquid flow to liquid outlet 72 along transporting the opposite downward direction of the direction of slag mud with spiral.A pump 74 is accepted the liquid of outlet 72 and it is sent by delivery side of pump 76.Return pipe 80 sends back to liquid the upstream extremity of groove 12.Return pipe preferably has out to the port of export 82 (Fig. 1) of little case 16 so that along with the flow through particulate of return pipe of liquid can run into bubble and make them floating.As shown in Figure 2, discharged by outlet 84, can be transported to the sun thus and dry the district so that dispose preceding final drying by the slag mud that downstream spire 62 pushed.

Axle 50 axis 86 with and on spire 55,62 all to become the gradient extension at C angle with horizontal line D, the position of the downstream portion 62 of conveying worm is higher than upstream portion 42 like this.C angle shown in the figure is about 15 ° to 20 °, and this angle helps the dehydration of slag mud, because slag mud continues to be pushed by helicoid, and is just drained at once from the water that slag mud extrudes.But this angle is big more, and it is just poor more that conveying worm holds the effect of slag mud.Best angle depends on concrete purposes, i.e. the quantity of slag mud and type.Conveyer 40 pivots are contained on the position 90 of cell wall with propping up.As shown in Figure 6, the strap-like member 92 of a flexibility as the plastic sheet of flexibility, up is stretched on the cell wall 94 basically from the upstream extremity of conveyer.The effective length of this strap-like member 92 can change, make the short column 96 on the cell wall pass eyelet groups 100 different on the strap-like member as long as move it, so just, can regulate the inclination angle of conveyer, specifically be exactly its axle and the inclination angle with spiral of different diameter parts.Strap-like member 92 helps to guide slag mud to drop in the conveyer.

Fig. 5 is the profile of conveyer, spire shown in the figure 54 and hole 102, and this hole can make in the fluid discharge screw clamp 70, and can allow slag mud to overflow when slag mud gets clogged and hinders helical rotation.Figure 4 shows that the vane pump import is contained in an example of the pump 74 at conveyer fluid issuing 72 places.

Fig. 7 and 8 is depicted as another kind of conveyer 110, and this machine has the main conveyor belt of a ring-type to extend between the pair roller 114,116, and roller 114 is driven by motor 118.The upstream portion 120 of conveyer is in order to accept to dump slag mud thereon.And the downstream portion 122 of conveyer also has another conveyer belt 124, and a side of this band and first conveyer belt 112 are adjacent to Face to face, in order to extruding Jie slag mud therebetween.The available support roller that spring is housed compresses this two strap mutually, is beneficial to the dehydration of slag mud.Slag mud after the dehydration is dumped in the container 126 so that further dry.Roller 116 cooperates with pump 74 by gear drive 130, and this pump sends back to water the upstream portion of trough.The water that comes out in the slag mud flows to pump 74 along diapire 132.

Like this, conveyer provided by the present invention just can be taken away slag mud and make its dehydration, and this conveyer is the part of the equipment of separating liquid and particulate normally, comes out to make then them to drop in the conveyer particulate floatation during separation.This conveyer has a upstream portion, one top of opening wide is arranged so that accept particulate at this place's conveyer case, also has a downstream portion can push slag mud so that its dehydration.Dehydrated when the conveyer downstream portion moves, applicant of the present invention has avoided transporting slag mud with pump by the slag mud that falls, thus when having avoided doing like this to the processing of smashing of slag mud.In addition, by dewatering along same conveyer, the applicant has dwindled the required space of equipment, and makes conveying and the dehydration of same conveyer as slag mud.A kind of conveying worm of the best comprises that a upstream portion is used for accepting slag mud and the downstream spire that average diameter is less from the top of opening wide, and this downstream portion is surrounded basically fully so that push slag mud.On same conveyer, make slag mud dehydration also be beneficial to the removal of moisture, particularly since water send back to particulate initial floating within it in case with the flotation cell of fluid separation applications in.The same motor that drives conveyer belt also can drive water pump, so that by return pipe water is sent back to.

Though illustrate here and shown specific embodiments of the invention, can recognize, for the people who is familiar with this technology, be easy to make amendment and change, so we expect the invention that illustrated claim covers this modification and is equal to.

Claims

1. equipment that makes liquid and separation of particles, it has a liquid and particle mixture injects its interior flotation cell, remove floating particulate with one and fall into the particulate of piece or the device of slag mud in the position, whereabouts, described device has a conveyer, this conveyer has one and is located substantially on below, position, described whereabouts in order to accept the upstream portion of described slag mud, the slag mud that moves along described conveyer with an extruding is so that remove the wherein downstream portion of moisture, and it is characterized by: described conveyer has: a major axis; One is connected and makes the motor of its rotation with described axle; One is located at the below of position, described whereabouts basically and is fixed on the upstream spire with first average diameter on the described axle; One is located at the downstream of described upstream spire and is fixed on downstream spire on the described axle, described downstream spire have one than the little average diameter of described upstream spire so that extruding slag mud; And tank that is used for accepting and drains the liquid that comes out from the slag mud extruding of the downstream portion of described conveyer.

2. according to the described equipment of claim 1, it is characterized by, described conveyer becomes the inclination angle with horizontal plane and stretches, the position of described downstream portion is higher than described upstream portion, and described conveyer comprises a case, described case has a top of opening wide so that accept slag mud along described upstream portion at least, and described case is the described tank of formation below described conveyer also, and this tank stretches with described inclination angle and is provided with liquid outlet at its lowest part.

3. according to the described equipment of claim 2, it is characterized by, described flotation cell has a upstream extremity that is positioned at the upstream of position, described whereabouts, described upstream extremity has an import can accept the mixture of described liquid and particulate, and this equipment also has a upstream extremity that connects described liquid outlet and described flotation cell so that the return pipe that liquid refluxes.

4. according to the described equipment of claim 3, it is characterized by, this equipment has a motor that drives described conveyer, and the upstream extremity at described conveyer has a pump, the import of this pump is connected with described return pipe with described liquid outlet respectively with outlet, and described pump is driven by described conveyer.

5. according to the described equipment of claim 1; it is characterized by; the particulate that described removal is floating and fall into the particulate of piece in the position, whereabouts or the device of slag mud to have one be that the beach plate of terminal point and one can promote particulate along described beach plate and makes it to fall device outside described edge wall with the edge wall; described conveyer comprises a conveyer case that closely surrounds described spiral to small part; described conveyer case has a upstream portion; this upstream portion closely centers on the bottom of described spiral upstream portion; and a top of opening wide is arranged so that the particulate of accepting to fall from described edge wall; described conveyer case also has a downstream portion, and this downstream portion 360 ° of ground basically surrounds described spiral downstream portion.