CN112408532A

CN112408532A - Low-temperature concentration device for treating garbage leachate through sectional dehydration

Info

Publication number: CN112408532A
Application number: CN202011114049.1A
Authority: CN
Inventors: 陈俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2021-02-26
Also published as: CN110963542B; CN112299516A; CN110963542A

Abstract

The invention discloses a low-temperature concentration device for treating landfill leachate, which is dehydrated in sections, and comprises a permeate liquid tank and a molten water tank, and is characterized in that: the device comprises a permeate liquid tank, a freezing concentration system and a reversing valve, wherein the outside of the permeate liquid tank is provided with the freezing concentration system, the freezing concentration system comprises two heat exchangers, one of the heat exchangers is arranged inside the permeate liquid tank, the other heat exchanger is arranged inside a water melting tank, one end of the heat exchanger in the permeate liquid tank is connected with a compressor, one end of the compressor is connected with an auxiliary cooler, one end of the auxiliary cooler is connected with the heat exchanger in the water melting tank, the heat exchanger in the water melting tank is connected with the heat exchanger in the permeate liquid tank through a pipeline, a throttling valve is arranged on the connecting pipeline, and the heat exchanger is spiral.

Description

Low-temperature concentration device for treating garbage leachate through sectional dehydration

Technical Field

The invention relates to the technical field of garbage treatment, in particular to a low-temperature concentration device for treating garbage leachate, which is dehydrated in a sectional manner.

Background

After the domestic garbage is transported to a sanitary landfill site for disposal, the domestic garbage can continuously generate garbage leachate under the influence of factors such as precipitation, surface runoff, water generated by decomposition of organic matters and the like, and the garbage leachate has high organic matter concentration and metal content, high toxicity and poor biodegradability.

The treatment method of the garbage sanitary landfill in China generally adopts a biological treatment method and a reverse osmosis membrane, but the treatment difficulty and the cost of the concentrated solution generated after reverse osmosis are higher; at present, the ice layer and the penetrating fluid need to be separated after the ice crystals are generated on the solid wall surface by the freezing concentration technology, the operation is complex and the separation efficiency is low. Therefore, it is desirable to design a low temperature concentration apparatus for landfill leachate treatment that reduces the volume of concentrated liquid and eliminates the need for separate ice crystals for staged dewatering.

Disclosure of Invention

The invention aims to provide a low-temperature concentration device for treating landfill leachate, which is dehydrated in a sectional manner, so as to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a landfill leachate of segmentation dehydration handles and uses low temperature concentration device, includes permeate liquid jar and melts the water pitcher, its characterized in that: the outside of infiltration fluid reservoir is provided with the freeze concentration system, the freeze concentration system includes the heat exchanger, the quantity of heat exchanger is two, one of them the heat exchanger is located the inside of infiltration fluid reservoir, and inside another heat exchanger setting is melting the water pitcher, is located the infiltration fluid jar one end of heat exchanger is connected with the compressor, the one end of compressor is connected with assists the cold ware, the one end of assisting the cold ware is connected with the heat exchanger that melts the water pitcher, is located the heat exchanger that melts the water pitcher and is located the heat exchanger of infiltration fluid jar and passes through the tube coupling, and is provided with the choke valve on the connecting pipeline.

Furthermore, the freeze concentration system still includes the switching-over valve, the shape of heat exchanger is the spiral, the switching-over valve is two-way solenoid directional valve, and the one end that is located the heat exchanger in the penetrant jar is connected with the first port of switching-over valve through the pipeline, the second port of switching-over valve is connected with the entrance point of compressor, the exit end of assisting the cold ware is connected with the third port of switching-over valve, the fourth port of switching-over valve is connected with the heat exchanger one end that is located in the water melting jar.

Further, one side of infiltration fluid reservoir is provided with the mount, be provided with elevating gear on the mount, elevating gear includes elevator motor, pillar fixed mounting is passed through at the top of mount has the upper bracket, elevator motor installs the bottom at the upper bracket, elevator motor's output shaft has the lead screw, the top of upper bracket corresponds installs the guide arm, the outside slip of lead screw has cup jointed the backup pad, the backup pad passes through ball nut pair swing joint with the lead screw, the top correspondence of heat exchanger is connected with wire rope, wire rope's top is connected with the backup pad.

Furthermore, a second electromagnet is installed at the top of the screw rod, a first electromagnet is fixedly installed at the top of the supporting plate, and the distance from the top end of the guide rod to the bottom surface of the second electromagnet is equal to the distance from the bottom surface of the supporting plate to the top surface of the first electromagnet.

Further, the freeze concentration system still includes the permeate liquid pump, the feed liquor end and the permeate liquid jar of permeate liquid pump link up mutually, the one end of permeate liquid pump is connected with the permeate liquid valve, the play liquid end of permeate liquid pump is connected with the back flow, and the back flow link up mutually with another department of permeate liquid jar, install the regenerator on the mount, the permeate liquid pump is connected with a port of regenerator, another port and the permeate liquid jar of regenerator pass through pipeline through connection, and be provided with the feed liquor valve on the pipeline between permeate liquid jar and the regenerator.

Furthermore, one side of the water melting tank is connected with a water melting pump in a penetrating manner, one end of the water melting pump is connected with a water melting valve, the liquid outlet end of the water melting pump is connected with a return pipe, the return pipe is communicated with the other part of the water melting tank, and the water melting pump is connected with one port of the heat regenerator.

Further, divide liquid motor to install one side of infiltration fluid reservoir, the output shaft that divides liquid motor has the branch liquid board, the outer peripheral face that divides the liquid board is laminated with the inner wall of infiltration fluid reservoir mutually, one side of infiltration fluid reservoir is provided with the liquid storage pot, the liquid storage pot is higher than the top of infiltration fluid reservoir, the infiltration fluid reservoir passes through pipeline through connections with the liquid storage pot, and is provided with the liquid storage pump on the pipeline, the both ends of liquid storage pump are parallelly connected to have the stock solution valve, it link up mutually through the pipeline between water tank and the infiltration fluid reservoir to melt, and is provided with the elevator pump on the pipeline, the both ends of elevator pump are parallelly connected to have the poppet valve, divide the liquid board to separate into two cavities about the infiltration fluid reservoir, and the height that highly is higher than the top of water tank of upper portion cavity bottom.

Further, the heat exchanger is hollow sphere, and the top of heat exchanger exposes in the air, the both sides through connection of heat exchanger has two cavity poles, the cavity pole rotates with the lateral wall of infiltration fluid reservoir to be connected, two the end of cavity pole is connected with the freeze concentration system, driven gear has been cup jointed to the outside of cavity pole, the rotating electrical machines is installed to one side of infiltration fluid reservoir, the output shaft of rotating electrical machines has cup jointed the driving gear, and the driving gear meshes with driven gear mutually.

Compared with the prior art, the invention has the following beneficial effects: in the invention, the raw materials are mixed,

(1) by arranging the permeation liquid tank, the melting tank and the freezing concentration system, the landfill leachate is concentrated at low temperature by utilizing the solid-liquid balance principle of an aqueous solution, and water is removed from the solution in a solid ice mode, so that the energy is saved, the environment is protected, and the increment of microorganisms can be prevented;

(2) the lifting device is arranged, so that the heat exchanger is lifted from the permeate liquid tank and then the ice layer is removed by external equipment, the operation is convenient, and the adsorption accumulation of the percolate on the ice layer is reduced;

(3) through the arrangement of the reversing valve, the first electromagnet and other components, the freezing unit rotates 180 degrees after freezing and enters the water melting tank, the hydraulic circuit is switched into a water melting mode, so that an ice layer is melted, the ice layer is prevented from being removed in a physical mode, the removing efficiency is high, the ice layer is completely removed, and meanwhile, the other heat exchanger is frozen, so that concentration is uninterruptedly realized;

(4) through being provided with components such as liquid storage pot and liquid separation board, make the ice sheet cover on the surface through spherical heat exchanger, after the ice-melt mode is ended with penetrating fluid extraction partly to the liquid storage pot, extract the water that melts to penetrating fluid pot again, open the valve after melting and make water flow back to original position by oneself, need not to remove the heat exchanger, simplified structure and working process greatly.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the lifting device of the present invention;

FIG. 3 is a hydraulic schematic diagram of the segmented dewatering system icing mode of the present invention;

FIG. 4 is a hydraulic schematic diagram of the water-melting mode of the staged dewatering system of the present invention;

FIG. 5 is a schematic view of the installation of the liquid storage tank and the permeate tank of the staged dewatering system of the present invention;

FIG. 6 is a hydraulic schematic diagram of a liquid storage tank and a permeate tank of the staged dehydration system of the present invention;

in the figure: 1. a permeate liquid tank; 2. a water melting tank; 3. a fixed mount; 4. a freeze concentration system; 5. a lifting device; 11. a liquid separation motor; 12. a rotating electric machine; 111. a liquid separation plate; 31. an upper bracket; 41. a compressor; 411. an auxiliary cooler; 42. a heat regenerator; 421. a liquid inlet valve; 43. a heat exchanger; 431. a throttle valve; 44. a diverter valve; 45. a water melting pump; 451. a water melting valve; 46. a permeate pump; 461. a permeate valve; 47. a liquid storage tank; 48. a liquid storage pump; 481. a liquid storage valve; 49. a lift pump; 491. a poppet valve; 51. a support plate; 52. a lifting motor; 521. a screw rod; 53. a guide bar; 54. a first electromagnet; 55. a second electromagnet; 56. a steel cord.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides the following technical solutions: a low-temperature concentration device for treating landfill leachate by sectional dehydration comprises a permeate liquid tank 1 and a melt water tank 2, wherein a freezing concentration system 4 is arranged outside the permeate liquid tank 1, the freezing concentration system 4 comprises two heat exchangers 43, one of the heat exchangers 43 is arranged inside the permeate liquid tank 1, the other heat exchanger 43 is arranged inside the melt water tank 2, one end of the heat exchanger 43 arranged inside the permeate liquid tank 1 is connected with a compressor 41, one end of the compressor 41 is connected with an auxiliary cooler 411, one end of the auxiliary cooler 411 is connected with the heat exchanger 43 arranged inside the melt water tank 2, the heat exchanger 43 arranged inside the melt water tank 2 is connected with the heat exchanger 43 arranged inside the permeate liquid tank 1 through a pipeline, a throttle valve 431 is arranged on the connecting pipeline, when the compressor 41 heats a refrigerant to a high temperature, and the auxiliary cooler 411 is utilized to introduce a cold medium into the heat exchanger 43 inside the melt water tank 2, cooling a hot medium, enabling a cold medium to flow through a heat exchanger 43 in the permeating liquid tank 1, enabling the permeating liquid to generate ice crystals on the surface, enabling the medium to flow back to the compressor 41, concentrating the landfill leachate at low temperature by utilizing the solid-liquid balance principle of an aqueous solution, removing water from the solution in a solid ice mode, saving energy, protecting environment, preventing the increment of microorganisms, and enabling an ice layer to be separated by utilizing external equipment to break after the permeating liquid is emptied;

as shown in fig. 3-4, the freeze concentration system 4 further includes a reversing valve 44, the heat exchanger 43 is spiral, the reversing valve 44 is a two-position two-way electromagnetic reversing valve, one end of the heat exchanger 43 located in the permeate tank 1 is connected with the first port of the reversing valve 44 through a pipeline, the second port of the reversing valve 44 is connected with the inlet end of the compressor 41, the outlet end of the auxiliary cooler 411 is connected with the third port of the reversing valve 44, the fourth port of the reversing valve 44 is connected with one end of the heat exchanger 43 located in the molten water tank 2, when the system is switched to the molten water mode, the reversing valve 44 reverses the direction of the heat medium flowing to the heat exchanger 43 with the frozen surface to melt the ice layer, the heat medium is reduced in pressure through the throttle valve 431, and more needs to adjust the opening degree to freeze or not freeze on the other heat exchanger 43, when the ice layer is not frozen, the system is suitable for the situation of, the direction of the reversing valve 44 is continuously changed to realize the switching of icing and deicing, so that the ice layer is prevented from being removed in a physical mode, the removing efficiency is high, and the ice layer is completely removed;

as shown in fig. 1-2, a fixing frame 3 is arranged on one side of the permeate tank 1, a lifting device 5 is arranged on the fixing frame 3, the lifting device 5 comprises a lifting motor 52, an upper bracket 31 is fixedly arranged on the top of the fixing frame 3 through a pillar, the lifting motor 52 is arranged on the bottom of the upper bracket 31, an output shaft of the lifting motor 52 is connected with a screw 521, a guide rod 53 is correspondingly arranged on the top of the upper bracket 31, a support plate 51 is sleeved on the outer portion of the screw 521 in a sliding manner, the support plate 51 is movably connected with the screw 521 through a ball nut pair, a steel wire rope 56 is correspondingly connected with the top of the heat exchanger 43, the top end of the steel wire rope 56 is connected with the support plate 51, when the heat exchanger 43 is lifted, the lifting motor 52 is started to drive the screw 521 to rotate, the support plate 51 is moved upwards by the guide of, the operation is convenient, and the adsorption accumulation of the percolate on an ice layer is reduced;

as shown in fig. 2, a second electromagnet 55 is installed on the top of the screw 521, a first electromagnet 54 is fixedly installed on the top of the support plate 51, the distance from the top end of the guide rod 53 to the bottom surface of the second electromagnet 55 is equal to the distance from the bottom surface of the support plate 51 to the top surface of the first electromagnet 54, when the direction is changed, the support plate 51 moves up to the top end of the guide rod 53 and is separated from the guide rod 53, at this time, the support plate 51 can rotate freely, so that the first electromagnet 54 and the second electromagnet 55 are electrified and attracted, the screw 521 can rotate to drive the support plate 51 to rotate, the support plate 51 is rotated by 180 degrees by controlling the rotation angle of the lifting motor 52, the position change of the two heat exchangers 43 is realized, the ice layer is prevented from being removed by a physical method, the removal efficiency is high, the ice layer is completely removed, the ice is frozen on, the steering structure is greatly simplified;

as shown in fig. 3-4, the freeze concentration system 4 further includes a permeate pump 46, a liquid inlet end of the permeate pump 46 is communicated with the permeate tank 1, one end of the permeate pump 46 is connected with a permeate valve 461, a liquid outlet end of the permeate pump 46 is connected with a return pipe, the return pipe is communicated with another part of the permeate tank 1, the heat regenerator 42 is mounted on the fixing frame 3, the permeate pump 46 is connected with one port of the heat regenerator 42, another port of the heat regenerator 42 is communicated with the permeate tank 1 through a pipeline, a liquid inlet valve 421 is disposed on the pipeline between the permeate tank 1 and the heat regenerator 42, when concentration is completed, the permeate pump 46 is turned on, the concentrate in the permeate tank 1 flows to the heat regenerator 42 and is discharged, and when the permeate valve 461 is turned off, backflow can be achieved, so that the temperature of the liquid is uniform;

one side of the water melting tank 2 is connected with a water melting pump 45 in a penetrating way, one end of the water melting pump 45 is connected with a water melting valve 451, the liquid outlet end of the water melting pump 45 is connected with a return pipe, the return pipe is communicated with the other part of the water melting tank 2, the water melting pump 45 is connected with one port of the heat regenerator 42, water in the water melting tank 2 is pumped into the heat regenerator 42 to be discharged, and the water exchanges heat with penetrating fluid entering the heat regenerator 42 in the discharging process, so that the penetrating fluid is cooled, the energy consumption is reduced, and the water can continuously flow back through the return pipe when the water melting valve 451 is closed;

as shown in fig. 5-6, a liquid separating motor 11 is installed on one side of a permeate liquid tank 1, an output shaft of the liquid separating motor 11 is connected with a liquid separating plate 111, the outer peripheral surface of the liquid separating plate 111 is attached to the inner wall of the permeate liquid tank 1, a liquid storage tank 47 is arranged on one side of the permeate liquid tank 1, the liquid storage tank 47 is higher than the top of the permeate liquid tank 1, the permeate liquid tank 1 is in through connection with the liquid storage tank 47 through a pipeline, a liquid storage pump 48 is arranged on the pipeline, liquid storage valves 481 are connected in parallel at two ends of the liquid storage pump 48, the melt liquid tank 2 is communicated with the permeate liquid tank 1 through a pipeline, a lift pump 49 is arranged on the pipeline, lift valves 491 are connected in parallel at two ends of the lift pump 49, the permeate liquid separating plate 111 divides the permeate liquid tank 1 into two chambers, the bottom of the upper chamber is higher than the top of the melt liquid tank 2, a heat exchanger 43 is arranged, when the icing is finished, the liquid storage pump 48 is started firstly, water is pumped into the liquid storage tank 47 from the lower part of the permeate liquid tank 1, when the horizontal plane is below the central axis of the liquid separation plate 111, the liquid separation motor 11 is started, the liquid separation plate 111 is driven to rotate to be attached to the inner wall of the permeate liquid tank 1, then the lifting pump 49 is started, water in the molten water tank 2 is pumped into the permeate liquid tank 1, the molten water and the permeate liquid are separated due to the blocking of the liquid separation plate 111, after the reversing valve 44 is reversed, the medium of the heat exchanger 43 in the permeate liquid tank 1 is heated by cold and hot to melt the ice layer on the surface of the medium, the lifting valve 491 is opened after the ice melting is finished, as the molten water level in the permeate liquid tank 1 is higher than the liquid level in the melt liquid tank 2, the atmospheric pressure leads the water back to the original position, then the liquid separation plate 111 is inclined, the liquid storage valve 481 is opened, the permeate liquid storage tank 47 flows into the permeate, the structure and the working process are greatly simplified;

the heat exchanger 43 is a hollow sphere, the top of the heat exchanger 43 is exposed in the air, two sides of the heat exchanger 43 are connected with two hollow rods in a penetrating way, the hollow rods are rotatably connected with the side wall of the permeating liquid tank 1, the ends of the two hollow rods are connected with a freezing concentration system, a driven gear is sleeved outside the hollow rods, a rotating motor 12 is installed on one side of the permeating liquid tank 1, an output shaft of the rotating motor 12 is sleeved with a driving gear, and the driving gear is meshed with the driven gear, when icing occurs, the rotating motor 12 drives the hollow rod to rotate, the hollow rod drives the heat exchanger 43 to rotate, meanwhile, cold medium is introduced into the heat exchanger 43 from the hollow rod and gathered below the inner wall, the outer wall of the heat exchanger 43 is cooled and uniformly frozen along with the rotation, the surface area of the spherical heat exchanger 43 is the largest, more ice layers can be attached, and half of the heat exchanger 43 is exposed in the air, so that less water is needed for pumping water and melting ice.

Example (b): when the low-temperature concentration device is used, penetrating fluid is firstly introduced into the penetrating fluid tank 1, the surface of the heat exchanger 43 is frozen through the freezing concentration system 4, the compressor 41 stops when the ice layer reaches a certain thickness, the first scheme is that the lifting device 5 lifts the heat exchanger, the electromagnet drives the two heat exchangers 43 to exchange positions after being attracted, the reversing valve 44 reverses after the position is turned to 180 degrees, so that the ice layer of the heat exchanger 43 is melted, the other scheme is that water in the melting water tank 2 is directly pumped into the penetrating fluid tank 1, one part of the penetrating fluid in the penetrating fluid tank 1 is pumped into the liquid storage tank 47, the melting water and the penetrating fluid are separated by the penetrating fluid separating plate 111, and the valve is opened after the melting water flows back to the original tank.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a landfill leachate of segmentation dehydration handles and uses low temperature concentration device, includes permeate liquid jar (1) and melts water jar (2), its characterized in that: a freezing and concentrating system (4) is arranged outside the permeate liquid tank (1), the freezing and concentrating system (4) comprises two heat exchangers (43), one of the heat exchangers (43) is positioned inside the permeate liquid tank (1), the other heat exchanger (43) is arranged inside the molten water tank (2), one end of the heat exchanger (43) positioned in the permeate liquid tank (1) is connected with a compressor (41), one end of the compressor (41) is connected with an auxiliary cooler (411), one end of the auxiliary cooler (411) is connected with the heat exchanger (43) in the molten water tank (2), the heat exchanger (43) positioned in the molten water tank (2) is connected with the heat exchanger (43) positioned in the permeate liquid tank (1) through a pipeline, and a throttle valve (431) is arranged on the connecting pipeline;

the freeze concentration system (4) further comprises a reversing valve (44), the heat exchanger (43) is spiral, the reversing valve (44) is a two-position two-way electromagnetic reversing valve, one end of the heat exchanger (43) located in the permeate liquid tank (1) is connected with a first port of the reversing valve (44) through a pipeline, a second port of the reversing valve (44) is connected with an inlet end of the compressor (41), an outlet end of the auxiliary cooler (411) is connected with a third port of the reversing valve (44), and a fourth port of the reversing valve (44) is connected with one end of the heat exchanger (43) located in the molten water tank (2);

heat exchanger (43) are hollow spheroid, and the top of heat exchanger (43) exposes in the air, the both sides through connection of heat exchanger (43) has two cavity poles, the cavity pole rotates with the lateral wall of infiltration fluid reservoir (1) to be connected, two the end of cavity pole is connected with the freeze concentration system, driven gear has been cup jointed to the outside of cavity pole, rotating electrical machines (12) are installed to one side of infiltration fluid reservoir (1), the output shaft of rotating electrical machines (12) has cup jointed the driving gear, and the driving gear meshes with driven gear mutually.