CN109608002A - A kind of sludge drier - Google Patents
A kind of sludge drier Download PDFInfo
- Publication number
- CN109608002A CN109608002A CN201910101459.3A CN201910101459A CN109608002A CN 109608002 A CN109608002 A CN 109608002A CN 201910101459 A CN201910101459 A CN 201910101459A CN 109608002 A CN109608002 A CN 109608002A
- Authority
- CN
- China
- Prior art keywords
- spiral case
- cylinder
- sludge
- wall
- case plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 82
- 230000005540 biological transmission Effects 0.000 claims abstract description 36
- 238000001035 drying Methods 0.000 claims abstract description 32
- 230000007246 mechanism Effects 0.000 claims abstract description 28
- 238000005452 bending Methods 0.000 claims abstract description 20
- 241000237858 Gastropoda Species 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 7
- 230000002708 enhancing effect Effects 0.000 claims description 2
- 206010037660 Pyrexia Diseases 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 210000003781 tooth socket Anatomy 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The present invention proposes a kind of sludge drier, sludge is divided dry on fever barrel, it is scratched in spiral transmission blade again, realize the separation of running part and drying nest, prevent sludge from seizing clogging, do not had to simultaneously according to required dry moisture content, by changing the circle number of spiral case positive and negative rotation than improving the efficiency of drying sludge the folding frequency that controls spiral case bending plate；Its technical solution solved is that including laterally disposed cylinder, there is closed guard at cylinder both ends, and cylinder upper end barrel is provided with through slot；There is screw blade in cylinder, there is spiral case plate on the outside of screw blade, there is protrusion on spiral case plate outer wall, there is blade in the side of protrusion, and spiral case plate outer wall is equipped with single direction ratchet mechanism, and present inventive concept is novel, the highly effective drying to sludge is realized by way of sludge to be smoothed out to drying and wipes crushing transmission off again, and separating dry space from moist space has prevented the phenomenon that seizes of gelatinization sludge, while the discharging of the transmission control sludge of single direction ratchet mechanism, improves work efficiency.
Description
Technical field
The present invention relates to technical field of sludge treatment, specifically a kind of sludge drier.
Background technique
Sludge is that a kind of extremely complex high-moisture being made of organic matter, bacterium, inorganic particle, colloid etc. is heterogeneous
Body generates when mostly being handled by municipal wastewater and plant chimney stalk.With urban development, sludge yield also increases therewith.Treatment of Sludge
It is the process that minimizing, stabilisation and harmless treatment are carried out to sludge, wherein the water content for reducing sludge is to keep sludge harmless
The important method of change.
Existing drying sludge technology mostly uses high temperature to add the mode of stirring that the moisture in sludge is discharged, and such method is being dried
It can be spent when dry " trie tackified alpha region ", generate sludge " seizing phenomenon ", cause to block at Treatment of Sludge, blade is difficult to clearly
Reason, and it is small with high temperature position contact area, de-water ratio is not high, inefficiency.
Therefore, the present invention devises a kind of by sludge " dry plate ", and transmits dry with the dry highly effective sludge being kept completely separate
Dry machine is necessary.
Summary of the invention
The purpose of the present invention is to solve the deficiencies in the prior art, and a kind of sludge drier proposed, will
Sludge divides the drying on fever barrel, then scratches in spiral transmission blade, realizes running part and drying sludge part
Separation, it is therefore prevented that sludge seizes clogging.It can not had to simultaneously according to required dry moisture content, by changing spiral case
The circle number of positive and negative rotation is than improving the efficiency of drying sludge the folding frequency that controls spiral case bending plate.
Its technical solution solved is that, including laterally disposed cylinder, there are closed guard, cylinder upper end barrel in cylinder both ends
It is provided with the through slot along cylinder direction of axis line；There is the screw blade of coaxial heart line in cylinder, screw blade wherein stretch by one end
Closed guard out；There is spiral case plate on the outside of screw blade, is connected at snail shell panel radius minimum with screw blade outer rim, on spiral case plate
The maximum bending plate of radius and adjacent bending plate are hinged, and the radius maximum of spiral case plate and the inner wall of cylinder have interval；Cylinder
Inner wall and spiral case plate outer wall form drying chamber, and spiral case plate inner wall and screw blade form transmission cavity；It is equipped on spiral case plate outer wall
Along the protrusion of cylinder direction of axis line, the length of protrusion and the axle center line length of cylinder inner wall are identical, and protrusion has elasticity, each
Protrusion reverse rotational direction is equipped with a blade being fixed on spiral case plate, and blade lengths are identical as projection length, protrusion and blade
It is adjustable with the inner wall distance of cylinder；The maximum bending plate outer wall of snail shell panel radius is equipped with single direction ratchet mechanism, this is unidirectional
Ratchet mechanism closes transmission cavity when spiral case plate is rotated against snail shell coiling direction, revolves in spiral case plate along snail shell coiling direction
When turning, open transmission cavity.
Present inventive concept is novel, and the height to sludge is realized by way of sludge to be smoothed out to drying and wipes crushing transmission off again
Drying is imitated, and separating dry space from moist space has prevented the phenomenon that seizes of gelatinization sludge, while the transmission of single direction ratchet mechanism controls going out for sludge
Material, improves work efficiency.
Detailed description of the invention
Fig. 1 is three-dimensional structure diagram of the present invention.
Fig. 2 is transversal profile figure of the present invention.
Fig. 3 is the portion A enlarged drawing in Fig. 2.
Fig. 4 is the portion A perspective view in Fig. 2.
Fig. 5 is B-B direction view in Fig. 2.
Specific embodiment
Below in conjunction with attached drawing, specific embodiments of the present invention will be described in further detail.
By attached drawing 1-5 it is found that the present invention includes laterally disposed cylinder 1, there is a closed guard 2 at 1 both ends of cylinder, on cylinder 1
End barrel is provided with the through slot along cylinder direction of axis line；Have the screw blade 3 of coaxial heart line in cylinder 1, screw blade 3 its
Closed guard 2 is stretched out in middle one end；Have spiral case plate 4 on the outside of screw blade 3, at 4 radius minimum of spiral case plate with 3 outer rim phase of screw blade
It connects, the maximum bending plate of radius and adjacent bending plate are hinged on spiral case plate 4, radius maximum and the cylinder 1 of spiral case plate 4
Inner wall has interval；1 inner wall of cylinder and 4 outer wall of spiral case plate form drying chamber 15, and 4 inner wall of spiral case plate and screw blade 3, which are formed, to be transmitted
Chamber 16；Protrusion 6 along 1 direction of axis line of cylinder, the length of protrusion 6 and the axle center of 1 inner wall of cylinder are installed on 4 outer wall of spiral case plate
Line length is identical, and protrusion 6 has elasticity, and each 6 reverse rotational direction of protrusion is equipped with a blade 7 being fixed on spiral case plate 4, knife
7 length of piece is identical as 6 length of protrusion, and protrusion 6 and blade 7 and the inner wall distance of cylinder 1 can adjust；4 radius of spiral case plate is maximum
Bending plate outer wall single direction ratchet mechanism is installed, which makes when spiral case plate 4 is rotated against snail shell coiling direction
Transmission cavity 16 is closed, and in spiral case plate 4 when rotating along snail shell coiling direction, opens transmission cavity 16.
Moisture evaporation rate height and facilitate charging, the 1 barrel upper end through slot area of cylinder when in order to dry sludge
Not less than 1/5th of barrel circumference.
The distance of 1 inner wall of cylinder is arrived in order to adjust protrusion 6 and blade 7, the protrusion 6 and blade 7 have different size,
It is mounted on spiral case plate 4 with dismountable method, as screw is fixed.
One protrusion 6 and a blade 7 constitutes one group of claying structure, in order to which claying is uniform, the spiral case plate 4
Outer wall be equipped at least 2 groups or more claying structures will not fall directly into 1 bottom of cylinder when sludge slides from 1 inner wall of cylinder
Portion, but fall on next group of protrusion 6 and blade 7, it is smoothed out on the inner wall of cylinder 1 again；And setting multiple groups claying
Structure, while can solve the processing of the big sludge of water content again.
In order to facilitate the folding of feeding and transmission cavity 16, the spiral case plate 4 is made of 4 pieces or more bending plates.
In order to control the folding of transmission cavity 16, the single direction ratchet mechanism can be by the single direction ratchet mechanism group of interior tooth engagement
At；The outer wall of snail plate radius maximum is hinged with rocking bar 8, and the other end of rocking bar 8 is connected on the driving shaft 9 of ratchet mechanism, main
9 outer rim of moving axis is equipped with a reel 10, and reel 10 is evenly distributed in several active pawls 11, pawl 11 and reel 10 it is hinged and
There is torsional spring in hinged place, and 10 outer rim of reel has driven ratchet 12, and driven 12 moment of ratchet touches with 1 inner wall of cylinder, active pawl 11
There is gap with driven ratchet 12, driven 12 both ends of ratchet, which are equipped with plectane 13, closes the ratchet mechanism, outside driven ratchet 12
Edge face is equipped with the protrusion of enhancing friction；When sludge is in drying stage, spiral case plate 4 is rotated against snail shell coiling direction, driving shaft 9 and snail
4 direction of rotation of coverboard is on the contrary, active pawl 11 slips on the tooth socket of driven ratchet 12, therefore driven ratchet 12 is stationary, this
When 1 inner wall of cylinder make ratchet mechanism stress, so that the maximum bending plate of 4 radius of spiral case plate be pushed to close, i.e., transmission cavity 16 is closed；
When sludge is in transfer phase, spiral case plate 4 is rotated along snail shell coiling direction, and driving shaft 9 and 4 direction of rotation of spiral case plate are on the contrary, actively
Pawl 11 is inserted into the tooth socket of driven ratchet 12, and driven ratchet 12 is pushed to turn over an angle, and driven ratchet 12 rotates with it, and reduces
To the thrust of the maximum bending plate of 4 radius of spiral case plate, under the action of torsional spring 14, the maximum bending plate of 4 radius of spiral case plate is opened,
I.e. transmission cavity 16 is opened.
The present invention in practical operation, ratchet mechanism be not easy it is very few, in order to make the frictional force of ratchet mechanism control biography enough
Send the folding of chamber 16, can along cylinder 1 axis direction on the outside of the maximum bending plate of 4 radius of spiral case plate uniformly hinged 2 or more
Ratchet mechanism.
In order to handle the biggish sludge of stickiness, the bending plate and closed guard 2 of the radius maximum of the spiral case plate 4 hang down
The blade shapes such as straight edge setting toothing, facilitate under the sludge scraping by attachment.
Water pipe is installed in cylinder barrel of the invention, hot water has been passed through in water pipe and cylinder inner wall is heated；It is needing
When sludge being dried, transmission shaft 5 is rotated against 4 hand of spiral of spiral case plate, transmit single direction ratchet mechanism will by frictional force
Chamber 16 is closed, and sludge is fallen into drying chamber 15 from the opening of 1 top of cylinder at this time, and transmission shaft 5 drives screw blade 3 and spiral case plate
4 slowly run, and sludge is by claying protrusion 6 and scrapes trowel piece 7 and is uniformly applied on the inner wall of cylinder 1, inner wall fever drying sludge；
After sludge drying is to required water content, transmission shaft 5 is rotated along 4 hand of spiral of spiral case plate, and the frictional force of single direction ratchet mechanism subtracts
Small, the restoring force of torsional spring 14 opens transmission cavity 16, and the bending plate edge of 4 radius maximum of spiral case plate will be sticked to cylinder after drying
Sludge scraping on 1 inner wall is fallen into transmission cavity 16, and the sludge for falling into 1 bottom of cylinder also can be in the rotary course of spiral case plate 4
Transmission cavity 16 is entered by shovel, spiral case plate 4 is continued to rotate along spiral case direction of rotation drives the sludge in transmission cavity 16 to enter screw blade
3, then sludge dry plate is blended by screw blade 3 and the sludge after drying is sent out into transmission cavity by wherein one side closed baffle 2
16 to the outside of cylinder 1.
Since sludge moisture content height is easy to slide from the inner wall of cylinder 1, so to set 2 pairs or more of protrusion 6 and blade
7, therefore, when sludge slides, it can fall in the protrusion 6 of lower part, be smoothed out again with the movement sludge of transmission shaft 5
On the inner wall of cylinder 1；Protrusion 6 has elasticity, and blade 7 is rigidity, and protrusion 6 and the cooperation processing sludge elastic protrusion 6 of blade 7 are uniform
Flexible claying, rigid blade 7 wipe extra sludge to prevent generating sludge blockage off, and part can be reduced when handling sludge
Damage.
Environment when due to drying sludge is poor, and frictional force of the ratchet mechanism when moving on 1 inner wall of cylinder can be very big,
Ratchet mechanism is facilitated flexibly to control the folding control of transmission cavity 16.
4 activity space of spiral case plate is small when due to drying sludge, and environment is poor, so in small using overall volume and closed
Mesh ratchet gear mechanism, external toothing ratchet mechanism is closed due to being inconvenient to, so using effect is bad.
According to the water content height of sludge after required drying, the frequency that adjustable transmission cavity 12 is closed contains if necessary
Sludge after the low drying of water then increases the circle number that inverse spiral case plate 4 rotates, if necessary to dirt of the high-moisture after dry
Mud then reduces the circle number that inverse spiral case plate 4 rotates.
Transmission shaft 5 in the present invention can drive spiral case plate 4 and screw blade 3 to rotate to the same direction simultaneously, spiral case plate 4
The cavity of cylinder 1 is separated into transmission cavity 12 and drying chamber 11, the outside of spiral case plate 4 and the cooperation of 1 inner wall of cylinder are dry dry
Sludge in dry chamber 12, the turbulent structure inside spiral case plate 4 cooperates with screw blade 3 send the sludge after drying from transmission cavity 12
Cylinder 1 out.
Due to the presence and its openable and closable structure of spiral case plate 4, makes only enter the sludge after drying in transmission cavity 12, connect
Sludge after touching the only drying of transmission shaft 5, has been isolated dry and wet sludge, embraces so will not generate gelatinization sludge in transmit process
Axis phenomena impair drying efficiency reduces driving consumption and volume exclusion.
If the sludge moisture content after required drying is low, sludge may agglomerate on 1 inner wall of cylinder, at this time screw blade 3
Larger sludge bulking can be blended during transmitting sludge.
Present inventive concept is novel, and the height to sludge is realized by way of wiping off again by sludge floating drying and smashing transmission
Drying is imitated, and separating dry space from moist space has prevented the phenomenon that seizes of gelatinization sludge, while single direction ratchet mechanism control sludge transmission makes drying
Rate is controllable, improves work efficiency.
Claims (7)
1. a kind of sludge drier, including laterally disposed cylinder (1), cylinder (1) both ends have closed guard (2), on cylinder (1)
End barrel is provided with the through slot along cylinder direction of axis line；It is characterized in that, there is the screw blade of coaxial heart line in cylinder (1)
(3), wherein closed guard (2) are stretched out in one end to screw blade (3)；Have spiral case plate (4) on the outside of screw blade (3), spiral case plate (4) half
It is connected at diameter minimum with screw blade (3) outer rim, the maximum bending plate of radius and adjacent bending plate are cut with scissors on spiral case plate (4)
It connects, the radius maximum of spiral case plate (4) and the inner wall of cylinder (1) have interval；Cylinder (1) inner wall is formed with spiral case plate (4) outer wall
Drying chamber (15), spiral case plate (4) inner wall and screw blade (3) form transmission cavity (16)；It is equipped on spiral case plate (4) outer wall along circle
The protrusion (6) of cylinder (1) direction of axis line, the length of protrusion (6) is identical as the axle center line length of cylinder (1) inner wall, protrusion (6) tool
It is flexible, each protrusion (6) reverse rotational direction be equipped with a blade (7) being fixed on spiral case plate (4), blade (7) length with
Protrusion (6) length is identical, and protrusion (6) and blade (7) and the inner wall of cylinder (1) distance can adjust；Spiral case plate (4) radius is maximum
Bending plate outer wall single direction ratchet mechanism is installed, the single direction ratchet mechanism when spiral case plate (4) inverse snail shell coiling direction rotates,
Transmission cavity (16) are closed, in spiral case plate (4) when rotating along snail shell coiling direction, open transmission cavity (16).
2. a kind of sludge drier according to claim 1, which is characterized in that the protrusion (6) and blade (7) has
Different size is mounted on spiral case plate (4) with dismountable method, as screw is fixed.
3. a kind of sludge drier according to claim 1, which is characterized in that a protrusion (6) and a knife
Piece (7) constitutes one group of claying structure, and the outer wall of the spiral case plate (4) is equipped with 2 groups or more claying structures.
4. a kind of sludge drier according to claim 1, which is characterized in that the spiral case plate (4) is rolled over by 4 pieces or more
Bent plate is constituted.
5. a kind of sludge drier according to claim 1, which is characterized in that the single direction ratchet mechanism can be by internal tooth
The single direction ratchet mechanism of engagement forms；The outer wall of snail plate radius maximum is hinged with rocking bar (8), the other end connection of rocking bar (8)
On the driving shaft (9) of ratchet mechanism, driving shaft (9) outer rim is equipped with a reel (10), and reel (10) is if be evenly distributed in
Dry active pawl (11), pawl (11) is hinged with reel (10) and there is torsional spring in hinged place, and reel (10) outer rim has driven ratchet
(12), driven ratchet (12) moment touches with cylinder (1) inner wall, and there are gap in active pawl (11) and driven ratchet (12), driven
Ratchet (12) both ends, which are equipped with plectane (13), closes the ratchet mechanism, and the outer edge surface of driven ratchet (12) is equipped with enhancing friction
Protrusion.
6. a kind of sludge drier according to claim 1, which is characterized in that the axis direction along cylinder (1) is in spiral case
Uniform hinged 2 or more ratchet mechanisms on the outside of the maximum bending plate of plate (4) radius.
7. a kind of sludge drier according to claim 1, which is characterized in that the radius of the spiral case plate (4) is maximum
Toothing is arranged in the bending plate at the place edge vertical with closed guard (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910101459.3A CN109608002B (en) | 2019-01-31 | 2019-01-31 | Sludge drying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910101459.3A CN109608002B (en) | 2019-01-31 | 2019-01-31 | Sludge drying machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109608002A true CN109608002A (en) | 2019-04-12 |
| CN109608002B CN109608002B (en) | 2021-10-22 |
Family
ID=66021225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910101459.3A Active CN109608002B (en) | 2019-01-31 | 2019-01-31 | Sludge drying machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109608002B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LT6705B (en) | 2019-07-31 | 2020-02-25 | Dongying Xiuchun Labor Protection Appliance Co., Ltd. | An apparatus for preparing fertilizer by using urban sewage sludge |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5263267A (en) * | 1989-03-20 | 1993-11-23 | Judco Manufacturing, Inc. | Method and apparatus for reducing volatile content of sewage sludge and other feed materials |
| CN102674655A (en) * | 2012-05-31 | 2012-09-19 | 东南大学 | Sludge harrow type drying method and device |
| CN104086068A (en) * | 2014-07-10 | 2014-10-08 | 深圳市科伟达超声波设备有限公司 | Industrial liquid-containing sludge drying treatment device |
| CN105417927A (en) * | 2016-01-17 | 2016-03-23 | 江苏通用环保集团有限公司 | Sludge dryer |
| CN107098568A (en) * | 2017-07-04 | 2017-08-29 | 无锡绿麦环保科技有限公司 | Disc type drier |
| JP2018034210A (en) * | 2017-12-04 | 2018-03-08 | 株式会社御池鐵工所 | Solidification apparatus |
-
2019
- 2019-01-31 CN CN201910101459.3A patent/CN109608002B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5263267A (en) * | 1989-03-20 | 1993-11-23 | Judco Manufacturing, Inc. | Method and apparatus for reducing volatile content of sewage sludge and other feed materials |
| CN102674655A (en) * | 2012-05-31 | 2012-09-19 | 东南大学 | Sludge harrow type drying method and device |
| CN104086068A (en) * | 2014-07-10 | 2014-10-08 | 深圳市科伟达超声波设备有限公司 | Industrial liquid-containing sludge drying treatment device |
| CN105417927A (en) * | 2016-01-17 | 2016-03-23 | 江苏通用环保集团有限公司 | Sludge dryer |
| CN107098568A (en) * | 2017-07-04 | 2017-08-29 | 无锡绿麦环保科技有限公司 | Disc type drier |
| JP2018034210A (en) * | 2017-12-04 | 2018-03-08 | 株式会社御池鐵工所 | Solidification apparatus |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LT6705B (en) | 2019-07-31 | 2020-02-25 | Dongying Xiuchun Labor Protection Appliance Co., Ltd. | An apparatus for preparing fertilizer by using urban sewage sludge |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109608002B (en) | 2021-10-22 |
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Effective date of registration: 20210924 Address after: No. 129-3, Yongfeng street, Pancheng street, high tech Development Zone, Nanjing, Jiangsu 210044 Applicant after: Nanjing Dajian Environmental Technology Industry Development Co.,Ltd. Address before: 450000 Shuangqiao sludge treatment plant, 200m east of North Fourth Ring Road, Huiji District, Zhengzhou City, Henan Province Applicant before: Han Huiqiao |
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