CN112079496A - Method for treating landfill leachate of garbage transfer station - Google Patents
Method for treating landfill leachate of garbage transfer station Download PDFInfo
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- CN112079496A CN112079496A CN202010961198.5A CN202010961198A CN112079496A CN 112079496 A CN112079496 A CN 112079496A CN 202010961198 A CN202010961198 A CN 202010961198A CN 112079496 A CN112079496 A CN 112079496A
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- leachate
- landfill leachate
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- 239000000149 chemical water pollutant Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 229910021645 metal ion Inorganic materials 0.000 claims abstract description 12
- 239000013049 sediment Substances 0.000 claims abstract description 11
- 229920002521 macromolecule Polymers 0.000 claims abstract description 6
- 238000002425 crystallisation Methods 0.000 claims abstract description 5
- 230000008025 crystallization Effects 0.000 claims abstract description 5
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 5
- 238000005189 flocculation Methods 0.000 claims description 32
- 230000016615 flocculation Effects 0.000 claims description 32
- 238000007906 compression Methods 0.000 claims description 29
- 230000006835 compression Effects 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 16
- 239000008394 flocculating agent Substances 0.000 claims description 12
- 229920000642 polymer Polymers 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 11
- 239000000919 ceramic Substances 0.000 claims description 6
- 239000003349 gelling agent Substances 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 230000003472 neutralizing effect Effects 0.000 claims description 4
- 238000005054 agglomeration Methods 0.000 claims description 3
- 230000002776 aggregation Effects 0.000 claims description 3
- 230000008014 freezing Effects 0.000 claims description 3
- 238000007710 freezing Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 description 11
- 238000011109 contamination Methods 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
- B65F9/00—Transferring of refuse between vehicles or containers with intermediate storage or pressing
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F2001/5218—Crystallization
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
Abstract
The invention relates to the technical field of landfill leachate treatment, in particular to a landfill leachate treatment method for a refuse transfer station. The invention has the beneficial effects that: through the step 1), the seepage speed of the landfill leachate in the garbage raw materials is increased, and the seepage efficiency of the landfill leachate is improved; through the step 3), the gel is used for wrapping the sediments of the suspended matters, so that the suspended matters can be agglomerated, the volume of the suspended matters is increased, the subsequent filtration is facilitated, and the filtration efficiency of the suspended matters and macromolecular substances in the landfill leachate is improved; by the step 5), metal ions in the landfill leachate are subjected to electrolytic filtration by utilizing the electrolysis principle, so that the content of the metal ions in the landfill leachate is reduced; the oil stain is crystallized and separated out by utilizing the difference of crystallization points of the oil stain and water in the percolate, so that the oil stain and the water are conveniently separated and filtered.
Description
Technical Field
The invention relates to the technical field of landfill leachate treatment, in particular to a method for treating landfill leachate in a refuse transfer station.
Background
The landfill leachate is high-concentration organic wastewater which is formed by deducting the saturated water holding capacity of garbage and a soil covering layer from the moisture contained in the garbage in a garbage landfill, rain, snow and water entering the landfill and other moisture, and passing through the garbage layer and the soil covering layer, and also contains accumulated moisture leaked from the garbage ready for incineration.
Among the prior art, when handling landfill leachate, generally through filtering, flocculation landfill leachate is handled, and the treatment methods is more single for landfill leachate's treatment effeciency and treatment quality are unsatisfactory, hardly handle macromolecular substance, suspended solid, metal ion, greasy dirt etc. in landfill leachate, therefore how to improve treatment quality and the efficiency to landfill leachate is the problem that technical staff in the field await the solution urgently.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a method for treating landfill leachate of a refuse transfer station, which can solve the problems in the prior art at least to a certain extent.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
a method for treating landfill leachate of a refuse transfer station comprises the following steps:
1) compressing the garbage raw materials: putting the garbage raw materials into compression equipment, compressing, and seeping out percolate in the garbage raw materials;
2) and (3) flocculation treatment of leachate: introducing the leachate compressed in the step into a flocculation device, pouring a flocculating agent which is 0.04 times of the total weight of the leachate into the flocculation device, and performing flocculation precipitation on suspended matters in the leachate to enable the suspended matters in the landfill leachate to form sediments;
3) and (3) agglomeration of the deposit: pumping out the clear water on the upper layer of the landfill leachate in the flocculation equipment, and then pouring the gelling agent which is 0.03 time of the weight of the residual leachate in the flocculation equipment into the flocculation equipment, so that the gelling agent wraps and agglomerates the sediment, the volume of the sediment is increased, and a deposited polymer is formed;
4) coarse filtration: introducing the deposited polymer and the percolate treated in the step into a filter screen, and filtering the deposited polymer by the filter screen;
5) electrolysis: placing the leachate treated by the steps in an electrolytic tank of an electrolytic device, wherein two electrolytic columns on the electrolytic device are respectively connected with a cathode power supply and an anode power supply, the electrolytic device is electrified, and metal ions in the leachate in the electrolytic tank move to the electrolytic columns connected with the anode power supply and are attached to the electrolytic columns, so that the metal ions in the leachate are filtered;
6) crystallizing at low temperature for deoiling: the leachate treated in the step is placed in a container, a refrigerating element is placed in the container, the refrigerating element cools the leachate to reduce the temperature of the leachate to 1-2 ℃, because water can be crystallized at the temperature of 0 ℃ and below 0 ℃, the crystallization point of oil stain is higher than the freezing point of water, the oil stain can be crystallized and separated out, then a fine filter screen is used for filtering the leachate, the crystallized oil stain is filtered, and suspended matters and oil stain in the leachate can be separated.
As a further optimization of the above technical solution, in the step 4), after the leachate and the deposited polymer are filtered by the filter screen, the leachate filtered by the filter screen is filtered again by using the tubular ceramic membrane group, and the leachate is filtered again by using the tubular ceramic membrane group, so as to filter the macromolecular substances in the leachate.
As a further optimization of the technical scheme, in the step 2), after the flocculating agent is added into the flocculation equipment, the film-forming aid with the weight 0.5 time that of the flocculating agent is added into the flocculation equipment.
As a further optimization of the technical scheme, in the step 2), firstly, an acid-base neutralizing agent is added into the flocculation equipment to adjust the pH value of the landfill leachate to 6.5-7.8.
As the further optimization of the technical proposal, the compression device comprises a compression bin, the top of the compression bin is open and hinged with a cover plate, the bottom of the compression bin is provided with a boss which is sunken towards the inside, a liquid storage space is enclosed between the boss and the inner wall of the compression bin, the outer wall of the compression bin is provided with a water outlet which is communicated with the liquid storage space, the sunken part of the boss is internally provided with a driving motor, the driving motor is in driving connection with a centrifugal bin, the centrifugal bin is coaxially and vertically connected in the compression bin in a rotating way, the peripheral surface of the centrifugal bin is provided with a plurality of liquid seepage holes which are communicated with the inside of the liquid storage space and are in a through hole form, the top of the centrifugal bin is open and is internally provided with a pressure plate in a sliding fit manner, the pressure plate is connected on the centrifugal bin through splines so as to be capable of axially sliding, the cover plate is provided with screw sleeves sleeved on the threaded rods in a threaded manner, and when the centrifugal bin rotates, the threaded rods are driven to be in threaded connection with the screw sleeves, so that the pressing plate rotates along with the centrifugal bin in the centrifugal bin and can vertically move.
The invention has the beneficial effects that: through the step 1), the seepage speed of the landfill leachate in the garbage raw materials is increased, and the seepage efficiency of the landfill leachate is improved; through the step 3), the gel is used for wrapping the sediments of the suspended matters, so that the suspended matters can be agglomerated, the volume of the suspended matters is increased, the subsequent filtration is facilitated, and the filtration efficiency of the suspended matters and macromolecular substances in the landfill leachate is improved; by the step 5), metal ions in the landfill leachate are subjected to electrolytic filtration by utilizing the electrolysis principle, so that the content of the metal ions in the landfill leachate is reduced; through the step 6), the oil contamination is crystallized and separated out by utilizing the crystallization point difference between the oil contamination and the water in the leachate, so that the oil contamination and the water are conveniently separated and filtered, and in conclusion, the treatment method can improve the high-efficiency treatment on metal ions, oil contamination and suspended matters in the landfill leachate; in addition, a compression device is arranged, garbage raw materials are poured into a centrifugal bin, the centrifugal bin is driven to rotate by a driving motor, so that the raw materials in the centrifugal bin generate centrifugal force, percolate in the garbage raw materials is centrifugally seeped out through a percolate hole by utilizing the centrifugal force, the seepage efficiency of the percolate in the garbage raw materials is improved, when the centrifugal bin rotates, because the inner wall of the centrifugal bin and a threaded rod are in a spline connection mode, the threaded rod synchronously rotates along with the centrifugal bin, and the threaded rod is in threaded connection with a threaded sleeve, so that a pressing plate rotates and vertically moves under the driving force of screwing of the threads, the garbage raw materials in the centrifugal bin are extruded by the pressing plate, the quick seepage of the percolate inside the garbage raw materials is accelerated under the driving of the centrifugal force of the centrifugal bin and the double acting force of the pressing plate, the seepage efficiency of the percolate is improved, the garbage raw materials can be compressed and molded by the pressing plate, so that the garbage raw materials can be packaged and transported conveniently.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow diagram of the method of the present invention;
FIG. 2 is a schematic view of the construction of the compressing apparatus of the present invention;
the reference numerals are explained below:
1-driving motor, 2-water outlet, 3-boss, 4-liquid seepage hole, 5-centrifugal bin, 6-threaded rod, 7-threaded sleeve, 8-cover plate, 9-pressing plate, 10-compression bin and 11-liquid storage space.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, 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, but not all 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, fig. 1-2 show a method for treating landfill leachate of a refuse transfer station, comprising the following steps:
1) compressing the garbage raw materials: putting the garbage raw materials into compression equipment, compressing, and seeping out percolate in the garbage raw materials;
2) and (3) flocculation treatment of leachate: introducing the leachate compressed in the step into a flocculation device, pouring a flocculating agent which is 0.04 times of the total weight of the leachate into the flocculation device, and performing flocculation precipitation on suspended matters in the leachate to enable the suspended matters in the landfill leachate to form sediments;
3) and (3) agglomeration of the deposit: pumping out the clear water on the upper layer of the landfill leachate in the flocculation equipment, and then pouring the gelling agent which is 0.03 time of the weight of the residual leachate in the flocculation equipment into the flocculation equipment, so that the gelling agent wraps and agglomerates the sediment, the volume of the sediment is increased, and a deposited polymer is formed;
4) coarse filtration: introducing the deposited polymer and the percolate treated in the step into a filter screen, and filtering the deposited polymer by the filter screen;
5) electrolysis: placing the leachate treated by the steps in an electrolytic tank of an electrolytic device, wherein two electrolytic columns on the electrolytic device are respectively connected with a cathode power supply and an anode power supply, the electrolytic device is electrified, and metal ions in the leachate in the electrolytic tank move to the electrolytic columns connected with the anode power supply and are attached to the electrolytic columns, so that the metal ions in the leachate are filtered;
6) crystallizing at low temperature for deoiling: the leachate treated in the step is placed in a container, a refrigerating element is placed in the container, the refrigerating element cools the leachate to reduce the temperature of the leachate to 1-2 ℃, because water can be crystallized at the temperature of 0 ℃ and below 0 ℃, the crystallization point of oil stain is higher than the freezing point of water, the oil stain can be crystallized and separated out, then a fine filter screen is used for filtering the leachate, the crystallized oil stain is filtered, and suspended matters and oil stain in the leachate can be separated.
In the step 4), after the leachate and the deposited polymer are filtered by the filter screen, the leachate filtered by the filter screen is filtered again by using the tubular ceramic membrane group, and the macromolecular substances in the leachate are filtered by the tubular ceramic membrane group again.
In the step 2), after the flocculating agent is added into the flocculation equipment, the film-forming assistant which is 0.5 times of the weight of the flocculating agent is added into the flocculation equipment, so that the flocculating agent is conveniently dispersed in the landfill leachate, and further the diffusion of the flocculating agent is improved, so that the flocculating agent can be fully mixed in the landfill leachate, and the suspended matters in the landfill leachate can be efficiently flocculated and deposited.
In the step 2), firstly, an acid-base neutralizing agent is added into the flocculation equipment to adjust the pH value of the landfill leachate to 6.5-7.8, and the acid-base value of the landfill leachate can be adjusted by adding the acid-base neutralizing agent.
The compression equipment comprises a compression bin 10, the top of the compression bin 10 is open and hinged with a cover plate 8, the bottom of the compression bin 10 is provided with a boss 3 sunken into the compression bin, a liquid storage space 11 is enclosed between the boss 3 and the inner wall of the compression bin 10, the outer wall of the compression bin 10 is provided with a water outlet 2 communicated with the liquid storage space 11, a driving motor 1 is installed in the sunken part of the boss 3, the driving motor 1 is connected with a centrifugal bin 5 in a driving way, the centrifugal bin 5 is coaxially and vertically connected in the compression bin 10 in a rotating way, the peripheral surface of the centrifugal bin 5 is provided with a plurality of liquid seepage holes 4 communicated with the liquid storage space 11 in a through hole way, the top of the centrifugal bin 5 is open, a pressing plate 9 is clamped in the centrifugal bin in a sliding way, the pressing plate 9 is connected on the centrifugal bin 5 through splines so as to enable the centrifugal bin 5 to axially, correspondingly, the cover plate 8 is respectively provided with a threaded sleeve 7 which is sleeved on the threaded rod 6 through threads, and when the centrifugal bin 5 rotates, the threaded rod 6 is driven to be in threaded connection with the threaded sleeve 7, so that the pressing plate 9 rotates along with the centrifugal bin 5 in the centrifugal bin 5 and can vertically move.
The embodiment also discloses a working method of the compression device, which comprises the following steps:
the cover plate 8 is turned over, the garbage raw materials are poured into the compression bin 10, the cover plate 8 is turned over again, the threaded rod 6 is rotated, the threaded rod 6 is clamped into the centrifugal bin 5, key grooves (not shown in the figure) on the threaded rod 6 are clamped with key strips (not shown in the figure) arranged on the inner wall of the centrifugal bin 5, the centrifugal bin 5 and the threaded rod 6 can synchronously rotate at the moment, an external power supply is switched on, the driving motor 1 is started, the driving motor 1 rotates to drive the centrifugal bin 5 to rotate, centrifugal force is generated on the garbage raw materials, meanwhile, the centrifugal bin 5 rotates, the threaded rod 6 synchronously rotates, as the threaded rod 6 is in threaded connection with the screw sleeve 7, the driving force is screwed through threads at the moment, the pressing plate 9 is driven to move downwards, the garbage raw materials are further subjected to the extrusion force of the pressing plate 9 and the centrifugal force of the centrifugal bin 5, the seepage efficiency of, the percolate seeping from the percolate holes 4 flows into the liquid storage space 11, and is pumped out to an external flocculation device for treatment by an external water pump through the liquid outlet 2.
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. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (5)
1. A method for treating landfill leachate of a refuse transfer station is characterized by comprising the following steps:
1) compressing the garbage raw materials: putting the garbage raw materials into compression equipment, compressing, and seeping out percolate in the garbage raw materials;
2) and (3) flocculation treatment of leachate: introducing the leachate compressed in the step into a flocculation device, pouring a flocculating agent which is 0.04 times of the total weight of the leachate into the flocculation device, and performing flocculation precipitation on suspended matters in the leachate to enable the suspended matters in the landfill leachate to form sediments;
3) and (3) agglomeration of the deposit: pumping out the clear water on the upper layer of the landfill leachate in the flocculation equipment, and then pouring the gelling agent which is 0.03 time of the weight of the residual leachate in the flocculation equipment into the flocculation equipment, so that the gelling agent wraps and agglomerates the sediment, the volume of the sediment is increased, and a deposited polymer is formed;
4) coarse filtration: introducing the deposited polymer and the percolate treated in the step into a filter screen, and filtering the deposited polymer by the filter screen;
5) electrolysis: placing the leachate treated by the steps in an electrolytic tank of an electrolytic device, wherein two electrolytic columns on the electrolytic device are respectively connected with a cathode power supply and an anode power supply, the electrolytic device is electrified, and metal ions in the leachate in the electrolytic tank move to the electrolytic columns connected with the anode power supply and are attached to the electrolytic columns, so that the metal ions in the leachate are filtered;
6) crystallizing at low temperature for deoiling: the leachate treated in the step is placed in a container, a refrigerating element is placed in the container, the refrigerating element cools the leachate to reduce the temperature of the leachate to 1-2 ℃, because water can be crystallized at the temperature of 0 ℃ and below 0 ℃, the crystallization point of oil stain is higher than the freezing point of water, the oil stain can be crystallized and separated out, then a fine filter screen is used for filtering the leachate, the crystallized oil stain is filtered, and suspended matters and oil stain in the leachate can be separated.
2. The method as claimed in claim 1, wherein in the step 4), the leachate and the deposited polymer are filtered by the filter screen, and then the leachate filtered by the filter screen is filtered again by using the tubular ceramic membrane group, and then the leachate is filtered again by using the tubular ceramic membrane group, so as to filter the macromolecular substances in the leachate.
3. The method as claimed in claim 1, wherein in the step 2), after the flocculating agent is added to the flocculation apparatus, the film-forming aid is added to the flocculation apparatus in an amount of 0.5 times the weight of the flocculating agent.
4. The method as claimed in claim 1, wherein in step 2), an acid-base neutralizing agent is first added into the flocculation equipment to adjust the pH of the landfill leachate to 6.5-7.8.
5. The method for treating the landfill leachate at the refuse transfer station according to claim 1, wherein the compression device comprises a compression bin (10), the top of the compression bin (10) is open and is hinged with a cover plate (8), a boss (3) which is sunken towards the inside is arranged at the bottom of the compression bin (10), a liquid storage space (11) is enclosed between the boss (3) and the inner wall of the compression bin (10), a water outlet (2) which is communicated with the liquid storage space (11) is arranged on the outer wall of the compression bin (10), a driving motor (1) is arranged in the sunken part of the boss (3), a centrifugal bin (5) is connected to the driving motor (1) in a driving manner, the centrifugal bin (5) is coaxially and vertically connected to the compression bin (10) in a rotating manner, a plurality of liquid seepage holes (4) which are communicated with the inside of the liquid storage space (11) and are in the form are arranged on the peripheral, centrifugal storehouse (5) top is uncovered, and its interior sliding fit block has clamp plate (9), clamp plate (9) pass through splined connection on centrifugal storehouse (5), make it can follow centrifugal storehouse (5) endwise slip, coaxial threaded rod (6) that are equipped with on clamp plate (9), correspond, respectively be equipped with swivel nut (7) of screw thread suit on threaded rod (6) on apron (8), when centrifugal storehouse (5) rotate, the drive threaded rod (6) and swivel nut (7) threaded connection, and then make clamp plate (9) follow centrifugal storehouse (5) and rotate and can vertical removal in centrifugal storehouse (5).
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