CN205974192U - A multistage high temperature ammonia still process system for refuse disposal filtration liquid - Google Patents
A multistage high temperature ammonia still process system for refuse disposal filtration liquid Download PDFInfo
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- CN205974192U CN205974192U CN201620954147.9U CN201620954147U CN205974192U CN 205974192 U CN205974192 U CN 205974192U CN 201620954147 U CN201620954147 U CN 201620954147U CN 205974192 U CN205974192 U CN 205974192U
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Abstract
The utility model provides a multistage high temperature ammonia still process system for refuse disposal filtration liquid, including pretreatment systems, the multistage system of taking off and the tail gas recovery system of blowing, pretreatment systems includes the one -level heat exchanger, the multistage system of taking off of blowing includes that the one -level is blown and takes off tower, second grade heat exchanger, second grade and blow and take off tower, tertiary heat exchanger and third grade and blow and take off the tower, tail gas recovery system includes the pickling tower. The advantage does: the utility model discloses need not to use the medicament to carry out PH to the water and adjusting and adjust back, no scale deposit protects follow -up membrane to handle, makes it to carry out the large -scale engineering ization application, solves landfill leachate and handles difficult problem.
Description
Technical field
This utility model belong to technical field of landfill leachate treatment and in particular to a kind of for processing percolate
Multistage high temperature ammonia steaming system.
Background technology
With the raising of the expansion of China's city size, the increase of urban population and Living consumption, China's city life
The yield of rubbish alive is also steeply rising.The especially big city such as Shanghai, Guangzhou, produces rubbish daily more than 1kg, per capita close to work
Industry level of developed countries.According to the principle of China's garbage disposal " innoxious, minimizing, resource ", by newly-built large quantities of lifes
Garbage sanitary filling field alive.And the qualified discharge whether percolate can be processed is to weigh whether a landfill yard is health
One of important indicator of landfill yard.
Garbage loading embeading and burning are the main method processing rubbish at present.However, Landfill Leachate Pollution is but existing solid
An inevitable problem during body offal treatment and following garbage loading embeading.Percolate can to subsoil water around,
Surface water and soil cause serious environmental pollution.Being processed to domestic waste using landfill yard, incineration plant and
During comprehensive management, one of main job content is exactly that percolate is processed using suitable method, keeps away
Exempt to cause secondary pollution to surrounding.
Percolate is a kind of sufficiently complex waste water of composition, containing multiple difficult degradation organic principles and ammonia nitrogen, has
The features such as pollutant levels height, strong toxicity, water quality and the water yield fluctuate big.The important feature of percolate is NH3- N concentration
Height, its concentration value, and constantly rises with the prolongation of landfill time to up to ten thousand from tens.
The percolate treating process of existing city refuse landfill, majority selects biochemical processing method.Processed with biochemical process
During percolate, the NH of excessive concentration3- N increased the load of biochemical treatment, and too low C/N (especially stablizes landfill yard
Percolate) lead in percolate nutritive proportion imbalance, have a strong impact on biochemical treatment system and stably effectively run.Garbage filter
Liquid middle and high concentration ammonia nitrogen is also inhibited to biological activity.
At present mainly using the mode of Add formaldehyde in biochemical treatment or glucose, water is improved to percolate C/N imbalance
C content in body, adds methanol and biochemical sludge can be caused to be poisoned, add glucose and then greatly can improve operating cost, and traditional
Ammonia aeration technique PH adjusts, high cost big with readjustment reagent consumption amount, and the worry of water body conductance is high, and fouling is serious, at the place of percolate
In reason, being widely used of follow-up membrane process, the serious feature of fouling causes membrane process treating capacity to decline, and damages big, equipment fault
Rate is high, and service life reduces.
Utility model content
The defect existing for prior art, this utility model provides a kind of multistage high temperature for processing percolate
Ammonia steaming system, can effectively solving the problems referred to above.
The technical solution adopted in the utility model is as follows：
This utility model provides a kind of multistage high temperature ammonia steaming system for processing percolate, including pretreatment system
System, multistage blow-removing system and exhaust gas recovery system；
Described pretreatment system includes first-class heat exchanger；Described multistage blow-removing system includes one-level stripping tower, secondary heat exchange
Device, two grades of stripping towers, three-level heat exchanger and three-level stripping tower；Described exhaust gas recovery system includes pickling tower；
Raw water is connected to the water inlet of described one-level stripping tower by the 1st aqueduct；Described 1st aqueduct is gone here and there
Join described first-class heat exchanger；
The discharge outlet of described one-level stripping tower is connected to the water inlet of described two grades of stripping towers by the 2nd aqueduct；?
Connect on described 2nd aqueduct described secondary heat exchanger；
The discharge outlet of described two grades of stripping towers is connected to the water inlet of described three-level stripping tower by the 3rd aqueduct；?
Connect on described 3rd aqueduct described three-level heat exchanger；
The discharge outlet of described three-level stripping tower is connected with the 4th aqueduct；The discharge outlet of described 4th aqueduct is connected to
Biochemical pond；Additionally, drawing reflux line from described 4th aqueduct, the discharge outlet of described reflux line is connected to described
The cold medium entrance of three-level heat exchanger；
Last person's QI KOU of described one-level stripping tower, described two grades of stripping towers and described three-level stripping tower is all by last person's trachea
Road is connected to the air inlet of described pickling tower.
Preferably, described exhaust gas recovery system also includes ammonium sulfate recycling can；Described pickling tower is reclaimed with described ammonium sulfate
Tank connects.
Preferably, the steam port that enters of described first-class heat exchanger, described secondary heat exchanger and described three-level heat exchanger is connected to
Same steam conveying pipe.
Preferably, the arrival end of described 1st aqueduct is provided with 1PH detection sensor, the 1st ammonia nitrogen detection sensing
Device, the 1st temperature detection sensor, the 1st flow detection sensor and the 1st electrical conductivity detection sensor；
The port of export of described three-level stripping tower is provided with 2PH detection sensor, the 2nd ammonia nitrogen detection sensor, the 2nd temperature
Detection sensor, the 2nd flow detection sensor and the 2nd electrical conductivity detection sensor；
The arrival end in described biochemistry pond is provided with 3PH detection sensor, the 3rd ammonia nitrogen detection sensor, the 3rd temperature inspection
Survey sensor and the 3rd electrical conductivity detection sensor；
The discharge outlet of described first-class heat exchanger is provided with the 4th temperature detection sensor；The discharge outlet of described secondary heat exchanger
5th temperature detection sensor is installed；The discharge outlet of described three-level heat exchanger is provided with the 6th temperature detection sensor；
The arrival end of described 1st aqueduct is provided with the 1st control valve, the discharge outlet of described three-level stripping tower is provided with
2nd control valve, described reflux line are provided with the 3rd control valve；The steam branch pipe that enters of described first-class heat exchanger is provided with the 4th
Control valve, described secondary heat exchanger enter steam branch pipe be provided with the 5th control valve and described three-level heat exchanger enter to steam
Vapour arm is provided with the 6th control valve；
Described 1PH detection sensor, described 1st ammonia nitrogen detection sensor, described 1st temperature detection sensor, described
1st flow detection sensor, the 1st electrical conductivity detection sensor, described 2PH detection sensor, described 2nd ammonia nitrogen detection sensing
Device, described 2nd temperature detection sensor, described 2nd flow detection sensor, the 2nd electrical conductivity detection sensor, described 3PH
Detection sensor, described 3rd ammonia nitrogen detection sensor, described 3rd temperature detection sensor, the 3rd electrical conductivity detection sensor, institute
State the 4th temperature detection sensor, described 5th temperature detection sensor, described 6th temperature detection sensor, described 1st control valve
Door, described 2nd control valve, described 3rd control valve, described 4th control valve, described 5th control valve and described 6th control
Valve processed is all connected to master controller.
Preferably, the inside of described one-level stripping tower, described two grades of stripping towers and described three-level stripping tower is separately mounted to
1st liquidometer, the 2nd liquidometer and the 3rd liquidometer；Described 1st aqueduct, described 2 aqueducts, described 3rd aqueduct
It is separately installed with the 1st water pump, the 2nd water pump, the 3rd water pump and the 4th water pump with described 4th aqueduct；
Described 1st liquidometer, described 2nd liquidometer, described 3rd liquidometer, described 1st water pump, described 2nd water pump, institute
State the 3rd water pump and described 4th water pump is all connected to master controller.
Preferably, described master controller is connected to display and telecommunication circuit.
The multistage high temperature ammonia steaming system for processing percolate that this utility model provides has advantages below：
(1) contrast traditional ammonia aeration technique, this utility model carries out PH without using medicament and adjusts and readjustment, no to water body
Fouling, protects follow-up film process, enables large-scale engineeringization application, solves the problems, such as that landfill leachate treatment is difficult.
(2) can achieve to the monitoring in all directions of whole landfill leachate treatment process it is ensured that treatment effeciency.
Brief description
The structural representation of the multistage high temperature ammonia steaming system for processing percolate that Fig. 1 provides for this utility model
Figure；
The handling process of the multistage high temperature ammonia steaming system for processing percolate that Fig. 2 provides for this utility model
Figure；
Wherein, 1- one-level stripping tower；Bis- grades of stripping towers of 2-；3- three-level stripping tower；4- pickling tower；5- reflux line.
Specific embodiment
In order that technical problem, technical scheme and beneficial effect that this utility model is solved become more apparent, below
In conjunction with drawings and Examples, this utility model is further elaborated.It should be appreciated that described herein be embodied as
Example only in order to explain this utility model, is not used to limit this utility model.
In conjunction with Fig. 1, this utility model provides a kind of multistage high temperature ammonia steaming system for processing percolate, including pre-
Processing system, multistage blow-removing system and exhaust gas recovery system；
Described pretreatment system includes first-class heat exchanger；Described multistage blow-removing system includes one-level stripping tower, secondary heat exchange
Device, two grades of stripping towers, three-level heat exchanger and three-level stripping tower；Described exhaust gas recovery system includes pickling tower；
Raw water is connected to the water inlet of described one-level stripping tower by the 1st aqueduct；Described 1st aqueduct is gone here and there
Join described first-class heat exchanger；
The discharge outlet of described one-level stripping tower is connected to the water inlet of described two grades of stripping towers by the 2nd aqueduct；?
Connect on described 2nd aqueduct described secondary heat exchanger；
The discharge outlet of described two grades of stripping towers is connected to the water inlet of described three-level stripping tower by the 3rd aqueduct；?
Connect on described 3rd aqueduct described three-level heat exchanger；
The discharge outlet of described three-level stripping tower is connected with the 4th aqueduct；The discharge outlet of described 4th aqueduct is connected to
Biochemical pond；Additionally, drawing reflux line from described 4th aqueduct, the discharge outlet of described reflux line is connected to described
The cold medium entrance of three-level heat exchanger；
Last person's QI KOU of described one-level stripping tower, described two grades of stripping towers and described three-level stripping tower is all by last person's trachea
Road is connected to the air inlet of described pickling tower.Described exhaust gas recovery system also includes ammonium sulfate recycling can；Described pickling tower and institute
State ammonium sulfate recycling can to connect.In addition first-class heat exchanger, secondary heat exchanger and three-level heat exchanger enter steam port be connected to same
Root steam conveying pipe, facilitates mounting arrangements.
For processing the multistage high temperature ammonia steaming system of percolate, connected by multigroup blow-removing system and with tail gas recycle system
System combines.
(1) pretreatment system
Pretreatment system includes first-class heat exchanger；For improving wastewater temperature, make up to condition needed for reaction.
(2) multistage blow-removing system
This system mainly includes：
One-level stripping tower：Stripping efficiency tapers off trend it is ensured that the maximization of stripping efficiency.
Two grades of preheaters：Supplement first stage tower leaving water temperature, being allowed to being capable of high-efficiency air stripping in two grades of towers.
Two grades of stripping towers：Secondary waste water high-efficiency air stripping after intensification.
Three-level preheater：Supplement two grades of tower leaving water temperatures, be allowed to reach water outlet efficiency in three-level tower.
Three-level stripping tower：Constantly backflow stripping, unit removal efficiency is relatively low, makes water outlet reach required removal condition.
(3) exhaust gas recovery system
This system mainly includes：
Pickling tower：Using the absorption water containing dilute sulfuric acid, absorb the ammonia containing in tail gas, realize tail gas qualified discharge
Ammonium sulfate recycling can：Reclaim the ammonia sulfate crystal generating in absorbing liquid, realize tail gas resource.
Multistage high temperature ammonia distillation process flow process is as shown in Figure 2：
Waste water enters one-level preheater, is improved raw water temperature using heat exchanger and enters one-level stripping afterwards to more than 55 DEG C,
Enter two grades of preheating supplementary heatings and enter two grades of strippings after one-level stripping, two grades of stripping water outlets are mixed with three-level stripping recycling effluent
Close and enter three-level preheating supplementary heating entrance three-level stripping, three-level stripping water outlet one enters biochemical a, backflow.Backflow is installed
The reason pipeline is：When three-level stripping tower go out saliva ammonia-nitrogen content up to standard when, backflow carries out a stripping again and processes.
The tail gas producing in multistage blow-removing system enters pickling tower, is reclaimed using dilution heat of sulfuric acid, realizes tail gas and reach
Mark discharge, enters ammonium recycling can, reclaims generated ammonia sulfate crystal after absorbing liquid cyclic absorption, for agricultural production, realize
Exhaust-gas resource.
In practical application, for realizing the Automated condtrol of whole landfill leachate treatment process it is ensured that at percolate
Reason effect, this utility model additionally provides Aulomatizeted Detect control unit.
Specifically, the arrival end of described 1st aqueduct is provided with 1PH detection sensor, the 1st ammonia nitrogen detection sensing
Device, the 1st temperature detection sensor, the 1st flow detection sensor and the 1st electrical conductivity detection sensor；
The port of export of described three-level stripping tower is provided with 2PH detection sensor, the 2nd ammonia nitrogen detection sensor, the 2nd temperature
Detection sensor, the 2nd flow detection sensor and the 2nd electrical conductivity detection sensor；
The arrival end in described biochemistry pond is provided with 3PH detection sensor, the 3rd ammonia nitrogen detection sensor, the 3rd temperature inspection
Survey sensor and the 3rd electrical conductivity detection sensor；
The discharge outlet of described first-class heat exchanger is provided with the 4th temperature detection sensor；The discharge outlet of described secondary heat exchanger
5th temperature detection sensor is installed；The discharge outlet of described three-level heat exchanger is provided with the 6th temperature detection sensor；
The arrival end of described 1st aqueduct is provided with the 1st control valve, the discharge outlet of described three-level stripping tower is provided with
2nd control valve, described reflux line are provided with the 3rd control valve；The steam branch pipe that enters of described first-class heat exchanger is provided with the 4th
Control valve, described secondary heat exchanger enter steam branch pipe be provided with the 5th control valve and described three-level heat exchanger enter to steam
Vapour arm is provided with the 6th control valve；
Described 1PH detection sensor, described 1st ammonia nitrogen detection sensor, described 1st temperature detection sensor, described
1st flow detection sensor, the 1st electrical conductivity detection sensor, described 2PH detection sensor, described 2nd ammonia nitrogen detection sensing
Device, described 2nd temperature detection sensor, described 2nd flow detection sensor, the 2nd electrical conductivity detection sensor, described 3PH
Detection sensor, described 3rd ammonia nitrogen detection sensor, described 3rd temperature detection sensor, the 3rd electrical conductivity detection sensor, institute
State the 4th temperature detection sensor, described 5th temperature detection sensor, described 6th temperature detection sensor, described 1st control valve
Door, described 2nd control valve, described 3rd control valve, described 4th control valve, described 5th control valve and described 6th control
Valve processed is all connected to master controller.
In addition, the inside of described one-level stripping tower, described two grades of stripping towers and described three-level stripping tower is separately mounted to the 1st
Liquidometer, the 2nd liquidometer and the 3rd liquidometer；Described 1st aqueduct, described 2 aqueducts, described 3rd aqueduct and institute
State the 4th aqueduct and be separately installed with the 1st water pump, the 2nd water pump, the 3rd water pump and the 4th water pump；
Described 1st liquidometer, described 2nd liquidometer, described 3rd liquidometer, described 1st water pump, described 2nd water pump, institute
State the 3rd water pump and described 4th water pump is all connected to master controller.
Described master controller is connected to display and telecommunication circuit.
As can be seen here, master controller can real-time detection to raw water entrance and three-level stripping tower outlet water quality situation, including
PH, ammonia-nitrogen content, temperature, flow and electrical conductivity；And the water quality situation according to the outlet of three-level stripping tower, part backflow, protect
Card effluent quality directly meets demand.
Temperature detection sensor is installed by the outlet in each heat exchanger, in the steam pipe that enters of each heat exchanger, tune is installed
Whether section valve, the temperature of real-time judge heat exchanger exit water can meet the requirements, if too high or too low for temperature, control into steaming
The open degree of steam pipe valve, so that the temperature of heat exchanger exit water meets require it is ensured that follow-up stripping efficiency.
By installing liquidometer in every grade of stripping tower, the liquid level in each stripping tower is monitored, wants when liquid level reaches
When asking, automatically control the startup of next stage water pump, thus realizing automatically controlling of stripping towers operation at different levels.
Further, since master controller is connected with display and communication equipment, can achieve to whole landfill leachate treatment mistake
The monitoring in all directions of journey is it is ensured that treatment effeciency.
As follows for long mountain pass percolate from garbage filling field imbalance development project data result：
| Inflow temperature | Water inlet ph | Influent ammonia nitrogen | Water outlet ammonia nitrogen | Ammonia nitrogen efficiency |
| 45 | 8.6 | 742.5 | 508.75 | 31.48% |
| 50 | 8.6 | 742.5 | 480.5 | 35.28% |
| 55 | 8.75 | 736.5 | 310.2 | 57.88% |
| 60 | 8.75 | 736.5 | 264.25 | 64.21% |
As follows for Shunyi comprehensive garbage disposal factory percolate imbalance development project data result：
Under the same terms, long mountain pass refuse landfill treating capacity is 2 times of Shunyi comprehensive garbage disposal factory treating capacity
As can be seen here, this utility model provide the multistage high temperature ammonia steaming system for processing percolate, have with
Lower advantage：
(1) contrast traditional ammonia aeration technique, this utility model carries out PH without using medicament and adjusts and readjustment, no to water body
Fouling, protects follow-up film process, enables large-scale engineeringization application, solves the problems, such as that landfill leachate treatment is difficult.
(2) can achieve to the monitoring in all directions of whole landfill leachate treatment process it is ensured that treatment effeciency.
The above is only preferred implementation of the present utility model it is noted that common skill for the art
For art personnel, on the premise of without departing from this utility model principle, some improvements and modifications can also be made, these improve and
Retouching also should regard protection domain of the present utility model.
Claims (6)
1. a kind of multistage high temperature ammonia steaming system for processing percolate is it is characterised in that include pretreatment system, multistage
Blow-removing system and exhaust gas recovery system；
Described pretreatment system includes first-class heat exchanger；Described multistage blow-removing system include one-level stripping tower, secondary heat exchanger, two
Level stripping tower, three-level heat exchanger and three-level stripping tower；Described exhaust gas recovery system includes pickling tower；
Raw water is connected to the water inlet of described one-level stripping tower by the 1st aqueduct；Series connection institute on described 1st aqueduct
State first-class heat exchanger；
The discharge outlet of described one-level stripping tower is connected to the water inlet of described two grades of stripping towers by the 2nd aqueduct；Described
Connect on 2nd aqueduct described secondary heat exchanger；
The discharge outlet of described two grades of stripping towers is connected to the water inlet of described three-level stripping tower by the 3rd aqueduct；Described
Connect on 3rd aqueduct described three-level heat exchanger；
The discharge outlet of described three-level stripping tower is connected with the 4th aqueduct；The discharge outlet of described 4th aqueduct is connected to biochemistry
Pond；Additionally, drawing reflux line from described 4th aqueduct, the discharge outlet of described reflux line is connected to described three-level
The cold medium entrance of heat exchanger；
Last person's QI KOU of described one-level stripping tower, described two grades of stripping towers and described three-level stripping tower is all by last person's feed channel even
It is connected to the air inlet of described pickling tower.
2. the multistage high temperature ammonia steaming system for processing percolate according to claim 1 is it is characterised in that described
Exhaust gas recovery system also includes ammonium sulfate recycling can；Described pickling tower is connected with described ammonium sulfate recycling can.
3. the multistage high temperature ammonia steaming system for processing percolate according to claim 1 is it is characterised in that described
The steam port that enters of first-class heat exchanger, described secondary heat exchanger and described three-level heat exchanger is connected to same steam conveying pipe.
4. the multistage high temperature ammonia steaming system for processing percolate according to claim 1 is it is characterised in that described
The arrival end of the 1st aqueduct be provided with 1PH detection sensor, the 1st ammonia nitrogen detection sensor, the 1st temperature detection sensor,
1st flow detection sensor and the 1st electrical conductivity detection sensor；
The port of export of described three-level stripping tower is provided with 2PH detection sensor, the 2nd ammonia nitrogen detection sensor, the 2nd temperature detection
Sensor, the 2nd flow detection sensor and the 2nd electrical conductivity detection sensor；
The arrival end in described biochemistry pond is provided with 3PH detection sensor, the 3rd ammonia nitrogen detection sensor, the 3rd temperature detection biography
Sensor and the 3rd electrical conductivity detection sensor；
The discharge outlet of described first-class heat exchanger is provided with the 4th temperature detection sensor；The discharge outlet of described secondary heat exchanger is installed
There is the 5th temperature detection sensor；The discharge outlet of described three-level heat exchanger is provided with the 6th temperature detection sensor；
The arrival end of described 1st aqueduct is provided with the 1st control valve, the discharge outlet of described three-level stripping tower is provided with the 2nd
Control valve, described reflux line are provided with the 3rd control valve；The steam branch pipe that enters of described first-class heat exchanger is provided with the 4th control
Valve processed, described secondary heat exchanger enter that steam branch pipe is provided with the 5th control valve and described three-level heat exchanger enter steam
Arm is provided with the 6th control valve；
Described 1PH detection sensor, described 1st ammonia nitrogen detection sensor, described 1st temperature detection sensor, described 1st stream
Quantity detection sensor, the 1st electrical conductivity detection sensor, described 2PH detection sensor, described 2nd ammonia nitrogen detection sensor, institute
State the 2nd temperature detection sensor, described 2nd flow detection sensor, the 2nd electrical conductivity detection sensor, described 3PH detection biography
Sensor, described 3rd ammonia nitrogen detection sensor, described 3rd temperature detection sensor, the 3rd electrical conductivity detection sensor, the described 4th
Temperature detection sensor, described 5th temperature detection sensor, described 6th temperature detection sensor, described 1st control valve, institute
State the 2nd control valve, described 3rd control valve, described 4th control valve, described 5th control valve and described 6th control valve
Door is all connected to master controller.
5. the multistage high temperature ammonia steaming system for processing percolate according to claim 4 is it is characterised in that described
The inside of one-level stripping tower, described two grades of stripping towers and described three-level stripping tower is separately mounted to the 1st liquidometer, the 2nd liquidometer
With the 3rd liquidometer；Described 1st aqueduct, described 2 aqueducts, described 3rd aqueduct and described 4th aqueduct divide
1st water pump, the 2nd water pump, the 3rd water pump and the 4th water pump are not installed；
Described 1st liquidometer, described 2nd liquidometer, described 3rd liquidometer, described 1st water pump, described 2nd water pump, the described 3rd
Water pump and described 4th water pump are all connected to master controller.
6. the multistage high temperature ammonia steaming system for processing percolate according to claim 4 is it is characterised in that described
Master controller is connected to display and telecommunication circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620954147.9U CN205974192U (en) | 2016-08-26 | 2016-08-26 | A multistage high temperature ammonia still process system for refuse disposal filtration liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620954147.9U CN205974192U (en) | 2016-08-26 | 2016-08-26 | A multistage high temperature ammonia still process system for refuse disposal filtration liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205974192U true CN205974192U (en) | 2017-02-22 |
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ID=58036479
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|---|---|---|---|
| CN201620954147.9U Active CN205974192U (en) | 2016-08-26 | 2016-08-26 | A multistage high temperature ammonia still process system for refuse disposal filtration liquid |
Country Status (1)
| Country | Link |
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| CN (1) | CN205974192U (en) |
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2016
- 2016-08-26 CN CN201620954147.9U patent/CN205974192U/en active Active
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Address after: Room 809 and 810, 8 / F, Chuangye building (Building 2, Xinghua Industrial Park), No.58, Second Street, Zhengzhou area (Jingkai), Henan pilot Free Trade Zone, Zhengzhou City, Henan Province, 450000 Patentee after: Shengao Lande Environmental Protection Technology Group Co.,Ltd. Address before: 450000 Zhengzhou economic and Technological Development Zone, Henan, 8, 809 and 810, No. 2, No. 2, Xinghua science and Technology Industrial Park. Patentee before: Land Environmental Protection Technology Group Co.,Ltd. |