CN102205189A - Sewage treatment device and sewage source heat pump central air-conditioning system using same - Google Patents
Sewage treatment device and sewage source heat pump central air-conditioning system using same Download PDFInfo
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- CN102205189A CN102205189A CN2011100446076A CN201110044607A CN102205189A CN 102205189 A CN102205189 A CN 102205189A CN 2011100446076 A CN2011100446076 A CN 2011100446076A CN 201110044607 A CN201110044607 A CN 201110044607A CN 102205189 A CN102205189 A CN 102205189A
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Abstract
The invention provides a sewage treatment device. A shell is vertically divided into a filter cavity and a scouring cavity, two sides of the filter cavity are provided with a sewage inlet and a filtered water outlet, two sides of the scouring cavity are provided with a water return port and a blow-off port, and the sewage inlet and the filtered water outlet are separated by using a filter screen; and a bowl sleeve is fixed on the inner wall of the shell, a piston rod passes through the center of the bottom of the bowl sleeve, the upper end of the piston rod extends into the filter cavity and reciprocates up and down to drive bristles of a plurality of rotor plates to clean the filter screen, the lower end of the piston rod is in power connection with a hydraulic cylinder fixed below the shell, the rod body of the piston rod is also provided with a ring slot, and the upper and lower stroke limit positions of the ring slot are positioned in the precipitation cavity and the scouring cavity respectively. The invention also provides a sewage source heat pump central air-conditioning system which is connected with the sewage treatment device. The device treats sewage, provides refrigerating and heating effects by using sewage, and is environment-friendly.
Description
Technical field
The present invention relates to a kind of device of disposing of sewage, also relate to a kind of water resource heat pump central air conditioner system.
Background technology
At present, the heat pump central air conditioner system is divided into substantially: water source (river, river, lake, underground water) heat pump central air conditioner system and earth source heat pump central air conditioner system.
This heat pump central air conditioner system be quote existing water source and set heat exchange or at the bottom of ground pre-buried ground, deep pipe laying pass through intermediary's water and set heat exchange.Because its front portion has installed heat exchanger additional, will reduce heat exchange efficiency greatly like this and energy is run off.Moreover, if there is impurity to be introduced into heat exchanger in the water source, can result in blockage to it, cause exchange capability of heat to descend, clear up heat exchanger for a long time and then can damage internal heat exchange tubes.If Cooling and Heat Source is river, river, lake, underground water, underground preburied pipe, then in use can cause the uneven in temperature of surrounding environment.For example, carry out heat exchange with lake water after, the lake water increase in temperature in influenced summer of the environment temperature in the lake, winter temperature reduces, thereby it is dead to live in the long change that may temperature like a fish out of water of inner biology; After carrying out heat exchange with underground water, underground soil property, cause ground end temperature change equally, thereby its environment temperature of the plant incompatibility around making is dead.
Summary of the invention
In order to address the above problem, the sewage source heat pump central air conditioner system that the invention provides a kind of sewage-treatment plant and use this device is directly used the thermal source of sewage as the heat pump central air-conditioning, improves the thermal efficiency, avoids environment is had a negative impact.
For achieving the above object, the technical solution used in the present invention is:
A kind of sewage-treatment plant, it is characterized in that: this sewage-treatment plant has one and uprightly is housing cylindraceous, be divided into the filter chamber on top and the flush chamber of bottom in the housing, the filter chamber both sides are relatively set with a sewage inlet and a filtered water outlet, and the flush chamber both sides are relatively set with a water return outlet and a sewage draining exit; Separate with a columnar screen pack between this sewage inlet and the outlet of this filtered water, this screen pack is fixed on this housing top wall;
Be fixed with a funnel shaped bowl cover on the inner walls, form the precipitation chamber of a taper in this bowl cover, this bowl cover bottom center is equipped with a piston rod, makes the filter chamber on housing top isolate mutually and not be communicated with the flush chamber of bottom by this bowl cover and connecting airtight of this piston rod;
This piston rod upper end is stretched in the filter chamber, and this outside, end, piston rod upper end is provided with the trapezoidal thread section, a screw swivel nut is on this trapezoidal thread section, the lead angle of this trapezoidal thread section and screw is greater than its angle of friction, the outside at this screw also is fixed with the rotor plate that several are arranged in the form of a ring, each rotor plate vertically is provided with, and the rotor plate outside be provided with can with the contacted bristle of the madial wall of above-mentioned screen pack, these several rotor plates upper ends then all are fixed on the central shaft with this housing pivot joint;
This piston-rod lower end is connected with a hydraulic cylinder power that is fixed on this housing below, is driven by this hydraulic cylinder to pump;
Also be provided with an annular groove on the shaft of this piston rod, the up-downgoing way limit position of this annular groove lays respectively in this precipitation chamber and this brush chamber.
In a preferable technical scheme: this trapezoidal thread section and this screw all adopt double thread or multi start thread.
In a preferable technical scheme: this piston-rod lower end down passes after this hydraulic cylinder, be located in again in the fixing key cover of relative this housing, this piston-rod lower end one side offers a keyway, this key cover inboard then offers an elongated slot along its length, a key is fastened in this keyway and this elongated slot, makes this key cover rotation relatively of this piston rod.
In a preferable technical scheme: the part corresponding to this precipitation chamber on this piston rod is arranged with the flexible protective sleeve that is used for protecting this trapezoidal thread section.
In a preferable technical scheme: this screen pack is fixed on this housing top wall, and this screen pack is provided with perforation corresponding to a side of this sewage inlet, and the inner space of this screen pack connects with this sewage inlet is vertical by this perforation.
In a preferable technical scheme: between this piston rod and this bowl cover, also be nested with a precipitation protective sleeve.
For achieving the above object, the technical solution used in the present invention is:
A kind of sewage source heat pump central air conditioner system, it comprises a water resource heat pump central air conditioner system, this water resource heat pump central air conditioner system is mainly joined by water source heat pump units and the circulation of heat exchange terminal and is formed, this water source heat pump units has a refrigerant delivery outlet, a refrigerant refluxing opening, a heat exchange inlet, and heat exchange outlet, the refrigerant passage that has the circulation of cooling medium between this refrigerant delivery outlet and the refrigerant refluxing opening, the thermal source passage that then has the circulation of cooling heat source fluid between this heat exchange inlet and the heat exchange outlet, also have heat-exchanger rig between this refrigerant passage and the thermal source passage, it is characterized in that:
This sewage source heat pump central air conditioner system also comprises a sewage-treatment plant as claimed in claim 1, this sewage inlet of this sewage-treatment plant enters this sewage-treatment plant for sewage, this filtered water outlet links to each other with the heat exchange inlet of this water source heat pump units, this water return outlet links to each other with the heat exchange outlet of this water source heat pump units, and this sewage draining exit is used for being discharged filter the rubbish impurity that obtains from sewage.
In a preferable technical scheme: be connected in this heat exchange terminal on the current return circuit of this water source heat pump units and also be provided with water replanishing device and water supply tank, make this water source heat pump units, heat exchange terminal, water replanishing device and water supply tank end to end and constitute a closed circuit.
Compared with prior art, the beneficial effect that the present invention has is: the sewage source heat pump central air conditioner system is to utilize the native sewage water in the municipal sewage trunk canal directly to enter in the unit through the full-automatic sewage-treatment plant of hydraulic pressure, connect heat exchange with cold media is upright, its heat exchange efficiency improves greatly.
Specifically, the advantage of sewage source heat pump central air conditioner system of the present invention also comprises:
1, efficient, energy-conservation: the method for operation of this system can make the energy input and export than reaching more than 1: 4, and the electric weight of promptly importing 1KW can access the above cold and hot amount of 4KW.Energy-conservation 30%-75%.
2, environmental protection: this system does not need equipment such as boiler, cooling tower.There are not coal, oil and combustion of natural gas emission to pollute.Non-outdoor unit.Can generation not make us uncomfortable tropical island effect.Noise is significantly less than traditional air-conditioning.Warm oneself the stage in the winter time,, then can reduce CO if utilize 10,000 tons of water for the indoor heat that provides every day
2Discharge capacity is about 5000 tons.
3, safe and reliable: sewage source heat pump system is added after the sewage filter device, can prevent effectively that the impurity of Cooling and Heat Source from entering the heat exchanging part of unit, thereby stable efficient is improved.
In a word, compare with other water resource heat pump central air conditioner systems, the sewage source heat pump central air conditioner system is sewage water filtration and cold and hot exchange an one, has realized the direct utilization of native sewage water, and structure is compact more, operational efficiency improves greatly.
Description of drawings
Fig. 1 is the overall structure schematic diagram of a kind of sewage source heat pump central air conditioner system provided by the invention;
Fig. 2 is heat pump central air-conditioning of the present invention and sewage-treatment plant syndeton schematic diagram;
Fig. 3 is the side view of Fig. 2;
Fig. 4 be the full-automatic sewage-treatment plant of hydraulic pressure provided by the invention partly cut open structural representation;
Fig. 5 is the principle of dynamics schematic diagram of the full-automatic sewage-treatment plant of hydraulic pressure.
The specific embodiment
At first, see also shown in Figure 1, a kind of sewage source heat pump central air conditioner system provided by the invention, it comprises a water resource heat pump central air conditioner system, this water resource heat pump central air conditioner system is mainly joined by water source heat pump units A and heat exchange terminal B circulation and is formed, for the refrigerant medium that prevents cycle operation in this water resource heat pump central air conditioner system owing to continuous loss causes system can't operate as normal, be connected at this heat exchange terminal B on the current return circuit of this water source heat pump units A and also be provided with water replanishing device C and water supply tank D, thus, this water source heat pump units A, heat exchange terminal B, water replanishing device C, and water supply tank D is end to end and constitute a closed circuit; And characteristics of the present invention are:
The filtered water of sewage-treatment plant E outlet 3 links to each other with this water source heat pump units A, constitute a sewage source heat pump F, after this sewage source heat pump F makes purified treatment with sewage, Cooling and Heat Source energy that contains in the sewage that this process is purified and the refrigerant medium in this water source heat pump units A are done heat exchange, provide this water resource heat pump central air conditioner system to use.
Please in conjunction with Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, this water source heat pump units A has a refrigerant delivery outlet A1, a refrigerant refluxing opening A2, a heat exchange inlet A3, and heat exchange outlet A4, the refrigerant passage that has the circulation of cooling medium between this refrigerant delivery outlet A1 and the refrigerant refluxing opening A2, the thermal source passage that then has cooling heat source fluid (sewage after promptly purifying) circulation between this heat exchange inlet A3 and the heat exchange outlet A4, also has heat-exchanger rig between this refrigerant passage and the thermal source passage, and also be provided with this refrigerant passage of control and heat exchanger channels on off operating mode in this water source heat pump units A and open big or small pump group and valve, these structures all belong to prior art, all do not give diagram, will not give unnecessary details yet at this.
What be worth emphasizing is, this sewage-treatment plant E, it has a sewage inlet 1, filtered water 3, water return outlets 7 of outlet and a sewage draining exit 11, this sewage inlet 1 can enter for sewage, this filtered water outlet 3 links to each other with the heat exchange inlet A3 of this water source heat pump units A, this water return outlet 7 links to each other with the heat exchange outlet A4 of this water source heat pump units A, and this sewage draining exit 11 is used for being discharged filter the rubbish impurity that obtains from sewage.
And the concrete structure of this sewage-treatment plant E sees also Fig. 4, shown in Figure 5, as seen from the figure:
This sewage-treatment plant E has one and uprightly is housing cylindraceous, be divided into the filter chamber 4 on top and the flush chamber 9 of bottom in the housing, filter chamber 4 both sides are relatively set with described sewage inlet 1 and filtered water outlet 3, and flush chamber 9 both sides are relatively set with described water return outlet 7 and described sewage draining exit 11.
Be fixed with a funnel shaped bowl cover 6 on the inner walls, form the precipitation chamber 61 of a taper in this bowl cover 6, this bowl cover 6 bottom center are equipped with a piston rod 12, make the filter chamber 4 on housing top isolate mutually and not be communicated with the flush chamber 9 of bottom by this bowl cover 6 and connecting airtight of this piston rod 12.For fear of piston rod 12 stretching motion and damaging repeatedly in bowl cover 6, between overlapping 6, this piston rod 12 and this bowl also be nested with a precipitation protective sleeve 8 made of copper.
These piston rod 12 upper ends are stretched in the filter chamber 4 on housing top, and this outside, end, piston rod 12 upper end is provided with trapezoidal thread section 121, screw 18 swivel nuts are on this trapezoidal thread section 121, the lead angle of this trapezoidal thread section 121 and screw 18 must be greater than the angle of friction between trapezoidal thread section 121 and the screw 18 (this lead angle be at least greater than 4 degree), and preferably adopt double thread or multi start thread, make this screw 18 can pumping and do positive and negative rotatablely moving with piston rod 12.Accompanying by rubbish impurity in precipitation chamber 61 in order to prevent this trapezoidal thread section 121, the part corresponding to this precipitation chamber 61 on this piston rod 12 is provided with flexible protective sleeve 10.
Also be fixed with several rotor plates of arranging in the form of a ring 2 in the outside of this screw 18, each rotor plate 2 vertically is provided with, its the outside be provided with can with the contacted bristle 21 of the madial wall of above-mentioned screen pack 5, rotor plate 2 upper ends then are fixed on the central shaft 22, and this central shaft 22 articulates by bearing 23 and this housing again.
A hydraulic cylinder 13 that is fixed on this housing below is down passed in these piston rod 12 lower ends, the fixing key of housing that is located in a relative sewage-treatment plant E again overlaps in 15, this piston rod 12 lower ends one side offers a keyway 122, this key overlaps 15 inboards and then offers an elongated slot 151 along its length, a key 16 is fastened in this keyway 122 and this elongated slot 151, makes these key 16 covers 15 rotations relatively of this piston rod 12.
Also be provided with an annular groove 123 on the shaft of this piston rod 12, this annular groove 123 is arranged on the position near this bowl cover 6, and the up-downgoing way limit position of this annular groove 123 lays respectively in this precipitation chamber 61 and this brush chamber; When piston rod 12 pumped, this annular groove 123 moved back and forth between the flush chamber 9 of the precipitation chamber 61 of this bowl cover 6 and the lower housing portion of this sewage-treatment plant E, thereby the rubbish impurity that will precipitate collection in the chamber 61 drives to flush chamber 9.
In order to realize the automatic control of this hydraulic cylinder, at the two ends of this elongated slot 151 travel switch 14 that can respond to this key 16 is set respectively, when piston rod 12 moves to extreme position, i.e. this hydraulic cylinder of antiport is so that with moving back and forth up and down.
And use of the present invention is as follows:
Sewage filter device extracts sewage by sewage pump from trunk sewer, enters by sewage inlet 1 in the housing of sewage filter device, passes through this screen pack 5 then, and screen pack 5 can filter out the above rubbish impurity of diameter 2mm.
The sewage that has filtered enters into by filtered water outlet 3 and carries out heat exchange in the water source heat pump units A.
When screen pack 5 needs cleaning, hydraulic cylinder 13 drives this piston rod 12 and makes stretching motion, because piston rod 12 can't be rotated by 15 restrictions of key 16 covers, therefore screw 18 is done positive and negative rotatablely moving, and drive rotor plate 2 rotations, clear up this screen pack 5 repeatedly with bristle 21, rubbish impurity is precipitated downwards naturally by the effect of gravity, in precipitation chamber 61, be collected then.
After rubbish arrived precipitation chamber 61, because precipitation chamber 61 is tapers, the rubbish natural sedimentation was driven by precipitation protective sleeve 8 by the annular groove 123 of piston rod 12 then to the bottom, arrived in the flush chamber 9 of lower housing portion of this sewage-treatment plant E; At this moment, because the trapezoidal thread section 121 of piston rod 12 is protected the aqueous corrosion of not getting dirty by the trapezoidal thread protective sleeve in precipitation chamber 61.
The present invention combines the full-automatic sewage-treatment plant E of hydraulic pressure cleverly with water source heat pump units A, directly use sewage to carry out heat exchange, be applicable to various water quality, comprise waste water He Jiang that trade effluent, municipal sewage, sewage treatment plant dump, river, lake, seawater etc.The present invention can be used for high-pressure system (0-10MPa/cm
2), filtering accuracy reaches 2mm.
Described as can be known by the said structure description and the course of work: sewage source heat pump F central air conditioner system is to utilize the native sewage water in the municipal sewage trunk canal directly to enter in the unit through the full-automatic sewage-treatment plant E of hydraulic pressure, connect heat exchange with cold media is upright, its heat exchange efficiency improves greatly.
Specifically, sewage source heat pump F central air conditioner system advantage is as follows:
1, efficient, energy-conservation: the method for operation of this system can make the energy input and export than reaching more than 1: 4, and the electric weight of promptly importing 1KW can access the above cold and hot amount of 4KW.Energy-conservation 30%-75%.
2, environmental protection: this system does not need equipment such as boiler, cooling tower.There are not coal, oil and combustion of natural gas emission to pollute.Non-outdoor unit.Can generation not make us uncomfortable tropical island effect.Noise is significantly less than traditional air-conditioning.Warm oneself the stage in the winter time,, then can reduce CO if utilize 10,000 tons of water for the indoor heat that provides every day
2Discharge capacity is about 5000 tons.
3, safe and reliable: sewage source heat pump F system adds after the sewage filter device, can prevent effectively that the impurity of Cooling and Heat Source from entering the heat exchanging part of unit, thereby stable efficient is improved.
In a word, compare with other water resource heat pump central air conditioner systems, sewage source heat pump F central air conditioner system is sewage water filtration and cold and hot exchange an one, has realized the direct utilization of native sewage water, and structure is compact more, operational efficiency improves greatly.
More than explanation is just illustrative for the purpose of the present invention; and nonrestrictive, those of ordinary skills understand, under the situation of the spirit and scope that do not break away from claim and limited; can make many modifications, variation or equivalence, but all will fall within protection scope of the present invention.
Claims (8)
1. sewage-treatment plant, it is characterized in that: this sewage-treatment plant has one and uprightly is housing cylindraceous, be divided into the filter chamber on top and the flush chamber of bottom in the housing, the filter chamber both sides are relatively set with a sewage inlet and a filtered water outlet, and the flush chamber both sides are relatively set with a water return outlet and a sewage draining exit; Separate with a columnar screen pack between this sewage inlet and the outlet of this filtered water, this screen pack is fixed on this housing top wall;
Be fixed with a funnel shaped bowl cover on the inner walls, form the precipitation chamber of a taper in this bowl cover, this bowl cover bottom center is equipped with a piston rod, makes the filter chamber on housing top isolate mutually and not be communicated with the flush chamber of bottom by this bowl cover and connecting airtight of this piston rod;
This piston rod upper end is stretched in the filter chamber, and this outside, end, piston rod upper end is provided with the trapezoidal thread section, a screw swivel nut is on this trapezoidal thread section, the lead angle of this trapezoidal thread section and screw is greater than its angle of friction, the outside at this screw also is fixed with the rotor plate that several are arranged in the form of a ring, each rotor plate vertically is provided with, and the rotor plate outside be provided with can with the contacted bristle of the madial wall of above-mentioned screen pack, these several rotor plates upper ends then all are fixed on the central shaft with this housing pivot joint;
This piston-rod lower end is connected with a hydraulic cylinder power that is fixed on this housing below, is driven by this hydraulic cylinder to pump;
Also be provided with an annular groove on the shaft of this piston rod, the up-downgoing way limit position of this annular groove lays respectively in this precipitation chamber and this brush chamber.
2. sewage-treatment plant according to claim 1 is characterized in that: this trapezoidal thread section and this screw all adopt double thread or multi start thread.
3. sewage-treatment plant according to claim 1, it is characterized in that: this piston-rod lower end down passes after this hydraulic cylinder, be located in again in the fixing key cover of relative this housing, this piston-rod lower end one side offers a keyway, this key cover inboard then offers an elongated slot along its length, a key is fastened in this keyway and this elongated slot, makes this key cover rotation relatively of this piston rod.
4. sewage-treatment plant according to claim 1 is characterized in that: the part corresponding to this precipitation chamber on this piston rod is arranged with the flexible protective sleeve that is used for protecting this trapezoidal thread section.
5. sewage-treatment plant according to claim 1 is characterized in that: also be nested with a precipitation protective sleeve between this piston rod and this bowl cover.
6. sewage-treatment plant according to claim 1, it is characterized in that: this screen pack is fixed on this housing top wall, this screen pack is provided with perforation corresponding to a side of this sewage inlet, and the inner space of this screen pack connects with this sewage inlet is vertical by this perforation.
7. sewage source heat pump central air conditioner system, it comprises a water resource heat pump central air conditioner system, this water resource heat pump central air conditioner system is mainly joined by water source heat pump units and the circulation of heat exchange terminal and is formed, this water source heat pump units has a refrigerant delivery outlet, a refrigerant refluxing opening, a heat exchange inlet, and heat exchange outlet, the refrigerant passage that has the circulation of cooling medium between this refrigerant delivery outlet and the refrigerant refluxing opening, the thermal source passage that then has the circulation of cooling heat source fluid between this heat exchange inlet and the heat exchange outlet, also have heat-exchanger rig between this refrigerant passage and the thermal source passage, it is characterized in that:
This sewage source heat pump central air conditioner system also comprises a sewage-treatment plant as claimed in claim 1, this sewage inlet of this sewage-treatment plant enters this sewage-treatment plant for sewage, this filtered water outlet links to each other with the heat exchange inlet of this water source heat pump units, this water return outlet links to each other with the heat exchange outlet of this water source heat pump units, and this sewage draining exit is used for being discharged filter the rubbish impurity that obtains from sewage.
8. sewage source heat pump central air conditioner system according to claim 7, it is characterized in that: be connected in this heat exchange terminal on the current return circuit of this water source heat pump units and also be provided with water replanishing device and water supply tank, make this water source heat pump units, heat exchange terminal, water replanishing device and water supply tank end to end and constitute a closed circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100446076A CN102205189A (en) | 2011-02-16 | 2011-02-16 | Sewage treatment device and sewage source heat pump central air-conditioning system using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100446076A CN102205189A (en) | 2011-02-16 | 2011-02-16 | Sewage treatment device and sewage source heat pump central air-conditioning system using same |
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| CN102205189A true CN102205189A (en) | 2011-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100446076A Pending CN102205189A (en) | 2011-02-16 | 2011-02-16 | Sewage treatment device and sewage source heat pump central air-conditioning system using same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110386683A (en) * | 2019-06-27 | 2019-10-29 | 江苏盐西高新水务建设管理有限公司 | A kind of municipal wastewater processing unit |
| CN112936954A (en) * | 2021-04-07 | 2021-06-11 | 深圳市智众环保科技有限公司 | Kitchen waste squeezing machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001014040A1 (en) * | 1999-08-25 | 2001-03-01 | Wolfgang Lindner | Cleaning device for a flowing medium, in particular waste water |
| CN201529428U (en) * | 2009-09-18 | 2010-07-21 | 重庆嘉陵制冷空调设备有限公司 | Automatic scraping brushing reverse flushing water purifier |
| CN101829445A (en) * | 2010-05-25 | 2010-09-15 | 江汉大学 | Fully-automatic hydrodynamic continuous brushing filter |
-
2011
- 2011-02-16 CN CN2011100446076A patent/CN102205189A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001014040A1 (en) * | 1999-08-25 | 2001-03-01 | Wolfgang Lindner | Cleaning device for a flowing medium, in particular waste water |
| CN201529428U (en) * | 2009-09-18 | 2010-07-21 | 重庆嘉陵制冷空调设备有限公司 | Automatic scraping brushing reverse flushing water purifier |
| CN101829445A (en) * | 2010-05-25 | 2010-09-15 | 江汉大学 | Fully-automatic hydrodynamic continuous brushing filter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110386683A (en) * | 2019-06-27 | 2019-10-29 | 江苏盐西高新水务建设管理有限公司 | A kind of municipal wastewater processing unit |
| CN112936954A (en) * | 2021-04-07 | 2021-06-11 | 深圳市智众环保科技有限公司 | Kitchen waste squeezing machine |
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