CN204529624U - Vehicle-mounted removable sewage dirt harmless treatment device - Google Patents
Vehicle-mounted removable sewage dirt harmless treatment device Download PDFInfo
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- CN204529624U CN204529624U CN201520208942.9U CN201520208942U CN204529624U CN 204529624 U CN204529624 U CN 204529624U CN 201520208942 U CN201520208942 U CN 201520208942U CN 204529624 U CN204529624 U CN 204529624U
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- harmless treatment
- treatment device
- mounted removable
- sewage dirt
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Abstract
The utility model provides a kind of vehicle-mounted removable sewage dirt harmless treatment device, belongs to sewage dirt processing technology field, and described vehicle-mounted removable sewage dirt harmless treatment device comprises vehicle-mounted sewage suction device, air flotation pool and sludge dewatering equipment.This vehicle-mounted removable sewage dirt harmless treatment device is by the set of perfect sewage dirt treatment process, make it to become new ideas: miniature movable type sewage dirt harmless treatment factory, the i.e. portable treatment unit of sewage dirt, do not need to take a large amount of soil and build a large amount of fixing this treatment unit for the treatment of facility to have easy and simple to handle, processing efficiency is high, process qualified discharge is effective, running cost economy, secondary is not needed to operate, scope of work is applicable to the collection and treatment of any large, medium and small city and small towns fecal sewage and other scope dirt, harmless treatment is carried out to sewage dirt in scene, be any one mobile unit inaccessiable function make it to become the vehicle-mounted removable treatment facility of uniqueness.
Description
Technical field
The utility model relates to sewage dirt processing technology field, in particular to vehicle-mounted removable sewage dirt harmless treatment device.
Background technology
Traditional harmless treatment process, needs to be equipped with special treatment station, and transfer car(buggy), by transfer car(buggy), pending sewage dirt is transported to transfer point and carries out harmless treatment.But, traditional harmless treatment process, the unavoidable technological deficiencies such as have floor space large, auxiliary facility cost is high, and workstation staff human cost is high.
Utility model content
The purpose of this utility model is to provide a kind of vehicle-mounted removable sewage dirt harmless treatment device, to improve the problems referred to above.
The utility model is achieved in that
This vehicle-mounted removable sewage dirt harmless treatment device comprises sewage suction device, described sewage suction device is communicated with air flotation pool, described air flotation pool top is provided with slag scraper, described slag scraper comprises to be scraped into end and scrapes end, the sidewall scraping end described in described air flotation pool correspondence is communicated with sludge dewatering equipment, described sludge dewatering equipment comprises inlet end and exit end, described exit end is communicated with air flotation pool, filtration unit is provided with bottom described air flotation pool, the sidewall of described air flotation pool away from described sewage suction device is provided with reuse water tank, the position of the corresponding described filtration unit of described reuse water tank is provided with water-in.
Further, the sidewall scraping end described in described air flotation pool correspondence is provided with collection slag bath, and described collection slag bath is communicated with described inlet end by pipeline.
So the object arranging collection slag bath is concentrated to carry out follow-up processed at scum silica frost, improve the working efficiency of whole vehicle-mounted removable sewage dirt harmless treatment device.
Further, scum filtering device is provided with in described pipeline.
The object arranging scum filtering device is that the solid particulate to entering sludge dewatering equipment carries out pre-filtering, thus isolates the larger impurity of some particles, thus reduces the load of sludge dewatering equipment, effectively improves the efficiency of solid-liquid separation.
Further, the motor that described slag scraper comprises two rotating shafts and drives a wherein rotating shaft to rotate, the two ends of two rotating shafts are provided with driving chain wheel, two driving chain wheels two rotating shafts being positioned at homonymy are all arranged with driving chain, are provided with multiple scraper plate between two driving chains.
The object arranging slag scraper is like this that its structure is simple, and easy for installation, reliable operation, can scrape scum silica frost in sludge dewatering equipment efficiently.
Further, the output shaft of described motor is provided with driving pulley, is provided with driven pulley by described motor-driven rotating shaft, described driving pulley and driven pulley are arranged with transmission belt.
Adopt the object of V belt translation to be it has that structure is simple, stable drive, can cushion absorbing, cheap, do not need lubrication and safeguard the features such as easy.
Further, described sludge dewatering equipment is folded spiral shell machine.
Adopt the object of folded spiral shell machine to be that it has floor space little, noise and vibration is little, the feature of long service life.
Further, described filtration unit is many filter sticks, and many filter sticks are arranged along the short transverse of described air flotation pool and length direction interval.
Its structure is simple to adopt the object of many filter sticks to be, with low cost and easy for installation, has excellent filter effect.
Further, described filter stick comprises multi-layer fiber filtering layer and multi-layer fiber casing ply, superimposed alternatively up and down when multi-layer fiber filtering layer and the tiling of fiber reinforcement layer, described fibrous filter layer is made up of the coarse filtration fiber block be from left to right arranged in order, fine filtering fiber block and essence filter fiber block, and described fibrous filter layer and the described fiber reinforcement layer of tiling are wound into described filter stick along the longitudinal direction.
The object arranging filter stick is like this fiber block of the fibrous three-stage filtration adopting different diameter size, graduate filtration can be carried out to the particulate matter in water, be distributed in the particulate matter that interfibrous adsorption particle can adsorb more small particle size simultaneously, Multi-stage fiber filter rod of the present utility model can filter nano level or less particulate matter in interception water, and fiber reinforcement layer can ensure that the overall consolidation of Multi-stage fiber filter rod is firm.
Further, this vehicle-mounted removable sewage dirt harmless treatment device also comprises transport trolley, and described sewage suction device, air flotation pool and sludge dewatering equipment are all arranged on described transport trolley.
The object arranging transport trolley is to make present treatment device can move to sewage dirt place place quickly and easily, thus greatly strengthen maneuvering ability and the practicality of this vehicle-mounted removable sewage dirt harmless treatment device.
Further, the sidewall of described air flotation pool is provided with access door, described access door is provided with transparent window.
The object arranging access door is to facilitate user to carry out cleaning and keeping in repair to air flotation pool inside; The object arranging transparent window is to facilitate user to observe the running condition of air flotation pool inside.
The beneficial effects of the utility model are:
This vehicle-mounted removable sewage dirt harmless treatment device is by the combination of vacuum pump, air flotation pool and folded spiral shell machine, simple structure, with low cost and easy to operate, fast and effeciently can carry out solid-liquid separation process to ight soil mud, effectively compensate for the defect of prior art.
Meanwhile, scum filtering device be arranged so that sewage dirt first can carry out pre-filtering process and enter folded spiral shell machine again, greatly can improve folded spiral shell machine like this to the dehydrating effect of sewage dirt, thus reduce the water ratio of solid dirt of discharging after the process of folded spiral shell machine.
This vehicle-mounted removable sewage dirt harmless treatment device is a new ideas treatment facility of modern development in science and technology, has broken present traditional occupation of land, has built fixing, erection of equipment treatment facility, the operation and management mode be made up of each professional.This treatment unit is collection sewage, the efficient quick treatment facility that the various advanced technologies of dirt is integrated.Owing to being vehicle-mounted form, be therefore applicable to large, medium and small cities and towns, the on-the-spot sewage dirt process under any envrionment conditions such as rural area, and do not need the vehicle-mounted transhipment of secondary that focuses on and a large amount of pipeline to build.
It is little that this treatment unit has investment, and processing efficiency is high, effective, treatment operating costs economy, the feature that processing mode is suitable for flexibly, just can play sewage dirt process effect when not needing to take a large amount of soil.In actual moving process, this treatment unit can the innoxious effective process 30 tons of sewage dirt per hour, is equivalent to the processing power of the medium-sized fecal sewage treatment field of the investment of occupation of land 15 mu.The maximum feature of this vehicle-mounted removable sewage dirt harmless treatment device is that the envrionment conditions that can meet different cities becomes fixation means into moveable treatment facility, and actual is exactly a moveable sewage dirt harmless treatment " factory ".
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, be briefly described to the accompanying drawing used required in embodiment below, be to be understood that, the following drawings illustrate only some embodiment of the present utility model, therefore the restriction to scope should be counted as, for those of ordinary skill in the art, under the prerequisite not paying creative work, other relevant accompanying drawings can also be obtained according to these accompanying drawings.
The front view of the vehicle-mounted removable sewage dirt harmless treatment device that Fig. 1 provides for the utility model first embodiment;
The sectional view of the vehicle-mounted removable sewage dirt harmless treatment device that Fig. 2 provides for the utility model first embodiment;
The vertical view of the vehicle-mounted removable sewage dirt harmless treatment device that Fig. 3 provides for the utility model first embodiment;
The structural representation of the filter stick that Fig. 4 provides for the utility model first embodiment.
Reference numeral gathers:
Vacuum pump 100; Air flotation pool 200; Collection slag bath 220;
Filter stick 240; Reuse water tank 300; Slag scraper 400;
Folded spiral shell machine 500.
Embodiment
Existing vehicle-mounted removable sewage dirt harmless treatment device and related process all cannot fast, stable and effectively solid-liquid separation is carried out to sewage dirt.
For the problems referred to above, the technical program provides a kind of vehicle-mounted removable sewage dirt harmless treatment device, this vehicle-mounted removable sewage dirt harmless treatment device utilizes the combination of sewage suction device, air flotation pool 200 and sludge dewatering equipment, can complete the solid-liquid separation of ight soil mud efficiently.
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.The assembly of the utility model embodiment describing and illustrate in usual accompanying drawing herein can be arranged with various different configuration and design.Therefore, below to the detailed description of the embodiment of the present utility model provided in the accompanying drawings and the claimed scope of the present utility model of not intended to be limiting, but selected embodiment of the present utility model is only represented.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to define further it and explain in accompanying drawing subsequently.
In description of the present utility model, it should be noted that, term " " center ", " on ", D score, " left side ", " right side ", " vertically ", " level ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, or this utility model product orientation of usually putting or position relationship when using, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second ", " the 3rd " etc. only for distinguishing description, and can not be interpreted as instruction or hint relative importance.
In description of the present utility model, also it should be noted that, unless otherwise clearly defined and limited, term " setting ", " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, particular case the concrete meaning of above-mentioned term in the utility model can be understood.
First embodiment, with reference to Fig. 1-4, this vehicle-mounted removable sewage dirt harmless treatment device comprises sewage suction device, described sewage suction device is communicated with air flotation pool 200, described air flotation pool 200 top is provided with slag scraper 400, described slag scraper 400 comprises to be scraped into end and scrapes end, the sidewall scraping end described in described air flotation pool 200 correspondence is communicated with sludge dewatering equipment, described sludge dewatering equipment comprises inlet end and exit end, described exit end is communicated with air flotation pool 200, filtration unit is provided with bottom described air flotation pool 200, the sidewall of described air flotation pool 200 away from described sewage suction device is provided with reuse water tank 300, the position of the corresponding described filtration unit of described reuse water tank 300 is provided with water-in.
Wherein, described sewage suction device is vacuum pump 100, and described vacuum pump 100 comprises suction port and relief outlet, described suction port is communicated with dirt sucking tube, described relief outlet is communicated with described air flotation pool 200 by pipeline, and vacuum pump 100 has compact construction, the feature of working stability; Described air flotation pool 200 is the equipment of a kind of suspended solid removed in various industry and municipal wastewater, grease and various jelly, and it mainly uses a large amount of microbubble to flutter to catch absorption fine particle gluing thing to make it to float, and reaches the effect of solid-liquid separation; Described slag scraper 400 is chain type slag scraper, reliablely and stablely scum silica frost can be scraped sludge dewatering equipment place; Described sewage suction device and sludge dewatering equipment are positioned at the homonymy of described air flotation pool 200, to make this vehicle-mounted removable sewage dirt harmless treatment device compact construction; Described water-in is positioned at the bottom of described reuse water tank 300, and the sidewall bottom of described reuse water tank 300 is provided with water valve.
Principle of work and the process of this vehicle-mounted removable sewage dirt harmless treatment device are such: sewage suction device sucks ight soil mud and is transferred to air flotation pool 200; Solid slag in ight soil mud is at the effect float downward of air flotation pool 200, and the liquid simultaneously in ight soil mud enters reuse water case 300 after filtration unit; The solid slag of floating is scraped in sludge dewatering equipment by slag scraper 400, in the process of scraping, carries out chemical separation process to scum silica frost, to improve the resolution of scum silica frost and solution; Solid slag squeezing is discharged by sludge dewatering equipment, and remaining liquid enters air flotation pool 200 again.By said process, ight soil mud just obtains effective solid-liquid separation process.
In the present embodiment, the sidewall scraping end described in described air flotation pool 200 correspondence is provided with collection slag bath 220, described collection slag bath 220 is communicated with described inlet end by pipeline.
Wherein, described collection slag bath 220 is cuboid and the sidewall slope be connected with pipeline is arranged, and the cross section at top is greater than bottom; Described collection slag bath 220 can be one-body molded with described air flotation pool 200, also can be removably connected on described air flotation pool 200 for independently pond body; Described pipeline is connected to the bottom of described collection slag bath 220.
So the object arranging collection slag bath 220 is concentrated to carry out follow-up processed at scum silica frost, improve the working efficiency of whole vehicle-mounted removable sewage dirt harmless treatment device.
In the present embodiment, in the pipeline of connection collection slag bath 220 and sludge dewatering equipment, be provided with scum filtering device.
Wherein, the two ends of described pipeline are removably connected on described collection slag bath 220 and sludge dewatering equipment respectively, so that the installation and maintenance of scum filtering device; Described scum filtering device comprises one deck filtering net, and the aperture of described filtering net can be determined according to the actual demand of user.
The object arranging scum filtering device is that the solid particulate to entering sludge dewatering equipment carries out pre-filtering, thus isolates the larger impurity of some particles, thus reduces the load of sludge dewatering equipment, effectively improves the efficiency of solid-liquid separation.
In the present embodiment, the motor that described slag scraper 400 comprises two rotating shafts and drives a wherein rotating shaft to rotate, the two ends of two rotating shafts are provided with driving chain wheel, two driving chain wheels two rotating shafts being positioned at homonymy are all arranged with driving chain, are provided with multiple scraper plate between two driving chains.
Wherein, two rotating shafts are all rotationally connected with described air flotation pool 200 top; Described scraper plate is removably connected on described driving chain; Multiple scraper plate is provided with many pusher dogs, scrapes slag effect to optimize.
The object arranging slag scraper 400 is like this that its structure is simple, and easy for installation, reliable operation, can scrape scum silica frost in sludge dewatering equipment efficiently.
In the present embodiment, the output shaft of described motor is provided with driving pulley, is provided with driven pulley by described motor-driven rotating shaft, described driving pulley and driven pulley are arranged with transmission belt.
Wherein, described transmission belt adopts flat rubber belting, to reduce costs; Described transmission belt is provided with three, to improve the stability of rotation.
Adopt the object of V belt translation to be it has that structure is simple, stable drive, can cushion absorbing, cheap, do not need lubrication and safeguard the features such as easy.
In the present embodiment, described sludge dewatering equipment is folded spiral shell machine 500.
Wherein, described folded spiral shell machine 500 is the abbreviation of folded spiral shell formula sludge dewatering equipment, and it can be widely used in the water treatment system of the industrial trade such as municipal wastewater process engineering and petrochemical industry, light industry, chemical fibre, papermaking, pharmacy, leather.
Adopt the object of folded spiral shell machine 500 to be that it has floor space little, noise and vibration is little, the feature of long service life.
In the present embodiment, described filtration unit is many filter sticks 240, and many filter sticks 240 are arranged along the short transverse of described air flotation pool 200 and length direction interval.
Wherein, the filter stick 240 of different heights is interlaced, to optimize the filter effect of whole filtration unit as much as possible.
Its structure is simple to adopt the object of many filter sticks 240 to be, with low cost and easy for installation, has excellent filter effect.
In the present embodiment, described filter stick 240 comprises multi-layer fiber filtering layer and multi-layer fiber casing ply, superimposed alternatively up and down when multi-layer fiber filtering layer and the tiling of fiber reinforcement layer, described fibrous filter layer is made up of the coarse filtration fiber block be from left to right arranged in order, fine filtering fiber block and essence filter fiber block, and described fibrous filter layer and the described fiber reinforcement layer of tiling are wound into described filter stick 240 along the longitudinal direction.
The object arranging filter stick 240 is like this fiber block of the fibrous three-stage filtration adopting different diameter size, graduate filtration can be carried out to the particulate matter in water, be distributed in the particulate matter that interfibrous adsorption particle can adsorb more small particle size simultaneously, filter stick 240 of the present utility model can filter nano level or less particulate matter in interception water, and fiber reinforcement layer can ensure that the overall consolidation of filter stick 240 is firm.
Further, this vehicle-mounted removable sewage dirt harmless treatment device also comprises transport trolley, and described sewage suction device, air flotation pool 200 and sludge dewatering equipment are all arranged on described transport trolley.
The object arranging transport trolley is to make present treatment device can move to sewage dirt place place quickly and easily, thus greatly strengthen maneuvering ability and the practicality of this vehicle-mounted removable sewage dirt harmless treatment device.
Further, the sidewall of described air flotation pool 200 is provided with access door, described access door is provided with transparent window.
The object arranging access door is to facilitate user to carry out cleaning and keeping in repair to air flotation pool 200 inside; The object arranging transparent window is to facilitate user to observe the running condition of air flotation pool 200 inside.
This vehicle-mounted removable sewage dirt harmless treatment device is by the combination of vacuum pump 100, air flotation pool 200 and folded spiral shell machine 500, simple structure, with low cost and easy to operate, fast and effeciently can carry out solid-liquid separation process to ight soil mud, effectively compensate for the defect of prior art.
Second embodiment, the device that the utility model embodiment provides, its technique effect realizing principle and generation is identical with the first embodiment, is concise and to the point description, and the not mentioned part of device embodiment part can with reference to corresponding contents in the first embodiment.
In the present embodiment, described sludge dewatering equipment is belt mud dewatering equipment.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a vehicle-mounted removable sewage dirt harmless treatment device, it is characterized in that, comprise sewage suction device, described sewage suction device is communicated with air flotation pool, described air flotation pool top is provided with slag scraper, described slag scraper comprises to be scraped into end and scrapes end, the sidewall scraping end described in described air flotation pool correspondence is communicated with sludge dewatering equipment, described sludge dewatering equipment comprises inlet end and exit end, described exit end is communicated with air flotation pool, filtration unit is provided with bottom described air flotation pool, the sidewall of described air flotation pool away from described sewage suction device is provided with reuse water tank, the position of the corresponding described filtration unit of described reuse water tank is provided with water-in.
2. vehicle-mounted removable sewage dirt harmless treatment device according to claim 1, is characterized in that, the sidewall scraping end described in described air flotation pool correspondence is provided with collection slag bath, and described collection slag bath is communicated with described inlet end by pipeline.
3. vehicle-mounted removable sewage dirt harmless treatment device according to claim 2, is characterized in that, be provided with scum filtering device in described pipeline.
4. vehicle-mounted removable sewage dirt harmless treatment device according to claim 1, it is characterized in that, the motor that described slag scraper comprises two rotating shafts and drives a wherein rotating shaft to rotate, the two ends of two rotating shafts are provided with driving chain wheel, two driving chain wheels two rotating shafts being positioned at homonymy are all arranged with driving chain, between two driving chains, are provided with multiple scraper plate.
5. vehicle-mounted removable sewage dirt harmless treatment device according to claim 4, it is characterized in that, the output shaft of described motor is provided with driving pulley, is provided with driven pulley by described motor-driven rotating shaft, described driving pulley and driven pulley are arranged with transmission belt.
6. vehicle-mounted removable sewage dirt harmless treatment device according to claim 1, is characterized in that, described sludge dewatering equipment is folded spiral shell machine.
7. vehicle-mounted removable sewage dirt harmless treatment device according to claim 1, is characterized in that, described filtration unit is many filter sticks, and many filter sticks are arranged along the short transverse of described air flotation pool and length direction interval.
8. vehicle-mounted removable sewage dirt harmless treatment device according to claim 7, it is characterized in that, described filter stick comprises multi-layer fiber filtering layer and multi-layer fiber casing ply, superimposed alternatively up and down when multi-layer fiber filtering layer and the tiling of fiber reinforcement layer, described fibrous filter layer is made up of the coarse filtration fiber block be from left to right arranged in order, fine filtering fiber block and essence filter fiber block, and described fibrous filter layer and the described fiber reinforcement layer of tiling are wound into described filter stick along the longitudinal direction.
9. vehicle-mounted removable sewage dirt harmless treatment device according to claim 1, it is characterized in that, also comprise transport trolley, described sewage suction device, air flotation pool and sludge dewatering equipment are all arranged on described transport trolley.
10. vehicle-mounted removable sewage dirt harmless treatment device according to claim 1, is characterized in that, the sidewall of described air flotation pool is provided with access door, described access door is provided with transparent window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520208942.9U CN204529624U (en) | 2015-04-08 | 2015-04-08 | Vehicle-mounted removable sewage dirt harmless treatment device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520208942.9U CN204529624U (en) | 2015-04-08 | 2015-04-08 | Vehicle-mounted removable sewage dirt harmless treatment device |
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| CN204529624U true CN204529624U (en) | 2015-08-05 |
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| CN201520208942.9U Active CN204529624U (en) | 2015-04-08 | 2015-04-08 | Vehicle-mounted removable sewage dirt harmless treatment device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104724895A (en) * | 2015-04-08 | 2015-06-24 | 杨朝虹 | Vehicle mounted mobile sewage and sludge harmless treatment device |
| CN105731577A (en) * | 2016-03-29 | 2016-07-06 | 湖北中油科昊机械制造有限公司 | Novel sewage treatment purification and drying unit |
| CN117164184A (en) * | 2023-11-03 | 2023-12-05 | 四川乾源智达环保科技有限公司 | Mobile aquaculture sewage treatment system |
-
2015
- 2015-04-08 CN CN201520208942.9U patent/CN204529624U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104724895A (en) * | 2015-04-08 | 2015-06-24 | 杨朝虹 | Vehicle mounted mobile sewage and sludge harmless treatment device |
| CN105731577A (en) * | 2016-03-29 | 2016-07-06 | 湖北中油科昊机械制造有限公司 | Novel sewage treatment purification and drying unit |
| CN117164184A (en) * | 2023-11-03 | 2023-12-05 | 四川乾源智达环保科技有限公司 | Mobile aquaculture sewage treatment system |
| CN117164184B (en) * | 2023-11-03 | 2024-01-02 | 四川乾源智达环保科技有限公司 | Mobile aquaculture sewage treatment system |
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Effective date of registration: 20181204 Address after: 4th Floor, No. 3 Building, No. 163 Shangqing Temple, Zhongshan No. 3 Road, Yuzhong District, Chongqing 400014 Patentee after: Zhongji Hi-Tech (Chongqing) Environmental Protection Engineering Co., Ltd. Address before: 400 000 Chongqing Yuzhong District Collection Bureau Lane No. 9 4-3 Patentee before: Yang Chaohong |