CN211733922U - Coal mine down-pipe type membrane water treatment chemical cleaning device - Google Patents
Coal mine down-pipe type membrane water treatment chemical cleaning device Download PDFInfo
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- CN211733922U CN211733922U CN201921979459.5U CN201921979459U CN211733922U CN 211733922 U CN211733922 U CN 211733922U CN 201921979459 U CN201921979459 U CN 201921979459U CN 211733922 U CN211733922 U CN 211733922U
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Abstract
The utility model discloses a coal mine down-pipe membrane water treatment chemical cleaning device, belonging to the technical field of water treatment, comprising a chemical cleaning water tank, a chemical cleaning water pump, a tubular membrane component, a chemical cleaning water inlet valve, a concentrated water reflux valve, a produced water reflux valve, an upper discharge valve, a lower discharge valve, a chemical cleaning blowoff valve and a quick plug-in hose; the chemical cleaning water inlet end is connected with the quick plug-in hose through a pipeline and a chemical cleaning water inlet valve, the concentrated water return end is connected with the quick plug-in hose through a pipeline and a concentrated water return valve, the produced water return end is connected with the quick plug-in hose through a pipeline and a produced water return valve, the upper discharge end is connected with the quick plug-in hose through a pipeline and an upper discharge valve and is connected with the chemical cleaning water tank through the quick plug-in hose, and the lower discharge end of the tubular membrane component is connected with the quick plug-in hose through a pipeline and a lower discharge valve. The utility model discloses be convenient for installation, dismantlement, transport, safe explosion-proof, can automatic control, unmanned on duty in the pit in the colliery.
Description
Technical Field
The utility model relates to a colliery tubular embrane method water treatment chemical cleaning device belongs to water treatment technical field.
Background
Compared with the aboveground treatment and recycling, the direct underground treatment and recycling of the mine wastewater can greatly reduce the treatment cost of the mine wastewater. From the long-term development of coal enterprises, mine water is directly treated and recycled underground, and the method has great significance for the sustainable development of mining areas and the national coal energy industry.
One of the selected processes for directly treating and recycling the mine wastewater underground is a tubular membrane method water treatment process, and the process has the characteristics of good water quality of produced water, suitability for underground complex working conditions and the like. However, the mine underground operation and working conditions are complex, membrane pollution becomes a main limiting factor of the mine water treatment process by using the tubular membrane method, and if the problem of membrane pollution can be directly solved underground, the continuous and stable operation of the water treatment process by using the tubular membrane method under the mine can be ensured.
The chemical cleaning (acid cleaning or alkali cleaning) can effectively solve the problem of membrane pollution, but the tubular membrane chemical cleaning device on the mine is restricted by factors such as the space of a tunnel under the mine, the size of equipment, the occupied area, the requirements of safety and explosion prevention, complete automatic control and the like, can not be directly applied to the underground of the coal mine, and can be applied to the underground after being technically reasonably improved.
In order to ensure continuous and stable operation of the underground tubular membrane mine water treatment process, the technical problem which is urgently needed to be solved in the technical field is to develop a modular tubular membrane water treatment chemical cleaning device which is convenient to install, disassemble and carry underground, safe and explosion-proof, can be automatically controlled and is unattended.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a but, the colliery is installation, dismantlement, transport, safe explosion-proof, automatic control, unmanned on duty's modularization tubular membrane water treatment chemical cleaning device in pit convenient to.
The above object of the utility model is achieved through the following technical scheme:
a chemical cleaning device for coal mine down-pipe membrane water treatment is characterized in that: the device comprises a chemical cleaning water tank, a chemical cleaning water pump, a tubular membrane component, a chemical cleaning water inlet valve, a concentrated water reflux valve, a produced water reflux valve, an upper discharge valve, a lower discharge valve, a chemical cleaning blow-down valve and a quick plug-in hose; one end of the chemical cleaning water pump is connected with the chemical cleaning water tank through a pipeline, and the other end of the chemical cleaning water pump is connected with one end of the tubular membrane component through a quick plug-in hose and a chemical cleaning water inlet valve; the bottom end of the chemical cleaning water tank is provided with a sewage outlet which is connected with a chemical cleaning sewage valve and a quick plug-in hose through a pipeline; the tubular membrane component is designed into five ports, namely a chemical cleaning water inlet end, a concentrated water return end, a produced water return end, an upper discharge end and a lower discharge end; the chemical cleaning water inlet end of the tubular membrane component is connected with the quick plug-in hose through a pipeline and a chemical cleaning water inlet valve, the concentrated water return end of the tubular membrane component is connected with the quick plug-in hose through a pipeline and a concentrated water return valve, the produced water return end of the tubular membrane component is connected with the quick plug-in hose through a pipeline and a produced water return valve, the upper discharge end of the tubular membrane component is connected with the quick plug-in hose through a pipeline and an upper discharge valve and is connected with the chemical cleaning water tank through the quick plug-in hose, and the lower discharge end of the tubular membrane component is connected with the quick plug-in hose through a pipeline and a lower discharge valve.
Preferably, the tubular membrane modules are 3-9 membrane modules connected side by side, and the number of the tubular membrane modules can be determined according to the actual water yield.
Preferably, the quick plug-in type hoses are respectively a water inlet end quick plug-in type hose, a concentrated water end quick plug-in type hose, a water production end quick plug-in type hose, an upper discharge end quick plug-in type hose, a lower discharge end quick plug-in type hose and a chemical cleaning sewage discharge end quick plug-in type hose.
Preferably, the chemical cleaning water inlet end is connected with the water inlet end quick plug-in hose through a pipeline and a chemical cleaning water inlet valve, the concentrated water return end is connected with the concentrated water end quick plug-in hose through a pipeline and a concentrated water return valve, the produced water return end is connected with the produced water end quick plug-in hose through a pipeline and a produced water return valve, the upper discharge end is connected with the upper discharge end quick plug-in hose through a pipeline and an upper discharge valve and is connected with the chemical cleaning water tank through the upper discharge end quick plug-in hose, and the lower discharge end is connected with the lower discharge end quick plug-in hose through a pipeline and a lower discharge valve.
Preferably, the chemical cleaning water tank is configured with citric acid with the mass concentration of 0.5-3%, or sodium hypochlorite with the mass concentration of 1000-5000 mg/L, or sodium hydroxide with the mass concentration of 0.1-2%.
Preferably, the material used by the electrified equipment used by the chemical cleaning device for water treatment by the coal mine down-pipe membrane method is an acid-alkali resistant material.
Preferably, the acid-base resistant material is 316L.
Preferably, the electrification equipment is a centrifugal pump and a solenoid valve.
Preferably, the quick plug-in hose is an anti-static composite hose special for a coal mine.
Preferably, the length of the quick plug-in hose is 5-15 meters.
Preferably, the two ends of the quick plug-in hose are provided with MT986 mining U-shaped pin type quick joint male ends.
Preferably, the chemical cleaning water tank and the tubular membrane assembly are respectively and independently formed into modules, the area and the volume of each module are small, the modules are machined into a skid-mounted device, each module can be placed in an explosion-proof tank respectively, and the size of each module meets the requirements of mine underground cage and roadway transportation.
The operation of the tubular membrane water treatment chemical cleaning device for the underground coal mine comprises the following steps:
(1) preparing acid and alkali solution
When the membrane pollution is mainly inorganic pollution, such as scaling, iron and manganese pollution and the like, a citric acid solution with the mass concentration of 0.5-3% needs to be prepared; when the membrane pollution is mainly organic pollution, preparing a sodium hydroxide solution with the mass concentration of 0.1-2%; when the membrane pollution is mainly microbial pollution, preparing a sodium hypochlorite solution with the mass concentration of 1000-5000 mg/L;
(2) chemical cleaning
In the step (1), acid-base solution is prepared and lifted by a chemical cleaning water pump to enter a tubular membrane module, cross-flow filtration is carried out on the liquid medicine, the filtered acid-base solution flows back into a chemical cleaning water tank through a water production return pipe to form inner side circulation, the cross-flow end chemical cleaning acid-base solution flows back into the chemical cleaning water tank through a concentrated water return pipe to form outer side circulation, and pollutants in and out of the membrane tube are cleaned through circulation at the inner side and the outer side for a certain time.
Preferably, the chemical cleaning water tank is made of carbon steel lining plastic or stainless steel 316L, and has the characteristics of acid and alkali resistance, corrosion resistance, flame retardance and the like.
Preferably, the electrified equipment used by the tubular membrane chemical cleaning device, such as a centrifugal pump and an electromagnetic valve (electric valve), is made of acid and alkali resistant materials such as 316L, and the like, and all need coal safety certificates approved by the national mine product safety mark center of safety standard, has the characteristics of acid and alkali resistance, corrosion resistance, safety, explosion resistance and the like, and can be safely used in underground coal mines.
Preferably, the quick plug-in hose is an anti-static composite hose special for a coal mine, is 5-15 meters long, is provided with MT986 male ends of a U-shaped pin type quick connector for a mine at two ends, has a quick plug-in function, and can be conveniently and quickly installed under a mine, connected with a pipeline and the like.
Preferably, the tubular membrane chemical cleaning device in the step (2) adopts cross-flow cleaning to form circulation cleaning of the inner side and the outer side of the tubular membrane.
Preferably, after the tubular membrane chemical cleaning device in the step (2) is acid-base cleaned, the tubular membrane flux is recovered to be more than 90% of the initial value.
Preferably, the chemical cleaning water tank device and the tubular membrane component device are respectively and independently formed into modules, the area and the volume of each module are small, the modules are machined into skid-mounted devices and can also be respectively placed in an explosion-proof tank, the size of each module meets the requirements of mine underground cage and roadway transportation, and the modules are connected through quick plug-in hoses.
Preferably, the underground coal mine tubular membrane chemical cleaning device controls the on-off of each electromagnetic valve (electric valve) and the start-stop of the chemical cleaning pump through a PLC automatic control program to realize the automatic operation of the device and realize unattended operation.
Has the advantages that:
the utility model provides a colliery tubular embrane method water treatment chemical cleaning device down, have the colliery of being convenient for installation in the pit, dismantle, the transport, acid and alkali resistance, it is fire-retardant, safe explosion-proof, but the automatic control, unmanned on duty, characteristics such as modularization, for mine waste water tubular membrane is handled and is provided a membrane flux assurance measure, can make it in the pit in succession, steady operation, thereby make mine waste water directly realize the circulation and the effective utilization of waste water after handling in the pit, saved waste water and promoted the required energy consumption in the pit, the emission of waste water discharge environment has been reduced, sewage factory handles on the mine and compares, energy consumption and enterprise operation cost have been saved greatly, both satisfy the economic benefits of enterprise, accord with environmental benefit and social again. The flux of the tubular membrane after chemical cleaning can be recovered to more than 90% of the initial value.
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the embodiments of the invention are not limited thereto. It should be understood that the embodiments described in this specification are only for the purpose of explaining the present invention, and are not intended to limit the present invention.
Drawings
FIG. 1 is a schematic structural diagram of the coal mine water treatment chemical cleaning device by a tubular membrane method.
Description of the main reference numerals:
1 chemical cleaning water tank 2 chemical cleaning water pump
3-pipe type membrane module 4-1 chemical cleaning water inlet valve
4-2 concentrated water reflux valve 4-3 produced water reflux valve
4-4 upper discharge valve and 4-5 lower discharge valve
4-6 chemical cleaning blowoff valve 5-1 water inlet end quick plug-in hose
5-2 concentrated water return end quick plug-in type hose 5-3 produced water return end quick plug-in type hose
5-4 upper-row end quick plug-in hose and 5-5 lower-row end quick plug-in hose
5-6 chemical cleaning blowdown end quick plug-in hose
Detailed Description
The components and software in the following embodiments are conventional components and software unless otherwise specified; unless otherwise indicated, all the components and software used in the present invention are commercially available.
Example 1
As shown in fig. 1, which is a schematic structural diagram of the coal mine downhole tubular membrane method water treatment chemical cleaning device of the present invention, wherein 1 is a chemical cleaning water tank, 2 is a chemical cleaning water pump, 3 is a tubular membrane module, 4-1 is a chemical cleaning water inlet valve, 4-2 is a concentrated water reflux valve, 4-3 is a produced water reflux valve, 4-4 is an upper discharge valve, 4-5 is a lower discharge valve, 4-6 is a chemical cleaning blow-off valve, 5-1 is a water inlet end fast plug-in hose, 5-2 is a concentrated water end fast plug-in hose, 5-3 is a water outlet end fast plug-in hose, 5-4 is an upper discharge end fast plug-in hose, 5-5 is a lower discharge end fast plug-in hose, and 5-6 is a chemical cleaning blow-off end fast plug-in hose; one end of a chemical cleaning water pump 2 is connected with a chemical cleaning water tank 1 through a pipeline, the other end of the chemical cleaning water pump is connected with one end of a tubular membrane component 3 through a water inlet end quick plug-in type hose 5-1 and a chemical cleaning water inlet valve 4-1, and the chemical cleaning water tank 1 is configured with citric acid with the mass concentration of 0.5-3%, or sodium hypochlorite with the mass concentration of 1000-5000 mg/L, or sodium hydroxide with the mass concentration of 0.1-2%; the bottom end of the chemical cleaning water tank 1 is provided with a sewage discharge outlet which is connected with a chemical cleaning sewage discharge valve 4-6 and a chemical cleaning sewage discharge end quick plug-in type hose 5-6 through a pipeline; the tubular membrane component 3 is designed into 5 ports which are respectively a chemical cleaning water inlet end, a concentrated water return end, a produced water return end, an upper discharge end and a lower discharge end, the chemical cleaning water inlet end is connected with a water inlet end quick plug-in hose 5-1 through a pipeline and a chemical cleaning water inlet valve 4-1, the concentrated water return end is connected with a concentrated water end quick plug-in hose 5-2 through a pipeline and a concentrated water return valve 4-2, the produced water return end is connected with a produced water end quick plug-in hose 5-3 through a pipeline and a produced water return valve 4-3, the upper discharging end is connected with a quick plug-in hose 5-4 of the upper discharging end through a pipeline and an upper discharging valve 4-4, the chemical cleaning water tank 1 is connected with an upper-row end quick plug-in hose 5-4, and a lower-row end is connected with a lower-row end quick plug-in hose 5-5 through a pipeline and a lower-row valve 4-5; the number of the tubular membrane modules 3 in the embodiment is 3 connected side by side;
the utility model discloses a colliery is used electrified equipment of tubular embrane method water treatment chemical cleaning device down, for example centrifugal pump, the used material of solenoid valve (motorised valve) is acid and alkali resistant material such as 316L, and all need to have the coal ann's card that national mine product safety mark center of ann's mark approved, have acid and alkali-resistance, anticorrosion, characteristics such as safe explosion-proof, can use safely under the colliery;
the utility model discloses a colliery tubular membrane method water treatment chemical cleaning device uses quick plug-in hose (including water inlet end quick plug-in hose 5-1, dense water end quick plug-in hose 5-2, produce water end quick plug-in hose 5-3, go up row end quick plug-in hose 5-4, lower row end quick plug-in hose 5-5, chemical cleaning blowdown end quick plug-in hose 5-6) chooses for use the special anti-static composite hose of colliery, length 5 ~ 15 meters, both ends are furnished with MT986 mining U type round pin formula quick-operation joint male end, have quick plug-in function, can make things convenient for colliery quick installation, pipe connection etc. in the pit;
the chemical cleaning water tank 1 and the tubular membrane component 3 used by the coal mine underground tubular membrane method water treatment chemical cleaning device of the utility model are respectively and independently formed into modules, each module has smaller area and volume, is processed into a skid-mounted device, and can also be respectively placed in an explosion-proof box, the size of the module meets the requirements of underground cage and tunnel transportation, and the modules are connected through a quick plug-in hose;
the utility model discloses a colliery tubular membrane method water treatment chemical cleaning device passes through the switch of each solenoid valve (motorised valve) of PLC automatic control program control to and the start-stop of chemical cleaning pump, realize the automatic operation of device, can realize unmanned on duty.
The utility model discloses a colliery tubular membrane chemical cleaning device's chemical cleaning's in pit flow includes following step:
(1) chemical cleaning preparation phase
The valves that are opened at this stage are: the concentrated water reflux valve 4-2, the produced water reflux valve 4-3, the upper discharge valve 4-4 and the lower discharge valve 4-5 are used for emptying water in the tubular membrane module and preparing for chemical cleaning, and the preparation time is generally 20-60 s and can be set;
(2) filling stage of chemical cleaning liquid
The valves that are opened at this stage are: after the valves are opened, a chemical cleaning water pump 2 is started to inject acid or alkali liquor in a chemical cleaning water tank 1 into a tubular membrane component 3, wherein the process takes about 20-60 s and can be set according to water quantity and the quantity of the membrane components;
(3) two-sided cyclic phase 1
The valves that are opened at this stage are: the method comprises the following steps that a chemical cleaning water inlet valve 4-1, a concentrated water backflow valve 4-2 and a produced water backflow valve 4-3 are opened, a chemical cleaning water pump 2 is started after the valves are opened, part of chemical cleaning liquid flows back to a chemical cleaning water tank 1 from a concentrated water backflow end, the chemical cleaning liquid penetrating through a membrane flows back to the chemical cleaning water tank 1 from a produced water end, two sides of the outer side and the inner side of a membrane tube are circulated, so that pollutants on the inner wall and the outer wall of the membrane tube are cleaned, membrane flux is recovered, and the circulation time of the two sides is set according to the pollution condition of the tubular membrane, and is generally 20-60 min;
(4) soaking stage
When the circulation on the two sides is finished, starting a soaking stage, stopping the chemical cleaning water pump 2, closing the concentrated water reflux valve 4-2, opening the produced water reflux valve 4-3, and setting the soaking time to be generally 20-60 min;
(5) two-sided cyclic phase 2
Repeating the step (3) at the stage, wherein the cycle time on two sides can be set and is generally 20-60 min;
(6) chemical cleaning exhaust
In the stage, a concentrated water reflux valve 4-2, a produced water reflux valve 4-3, an upper discharge valve 4-4, a lower discharge valve 4-5 and a chemical cleaning blow-down valve 4-6 are opened, and chemical cleaning liquid in the tubular membrane component 2 and the chemical cleaning water tank 1 is completely discharged;
(7) rinsing preparation stage
Closing the chemical cleaning blowoff valve 4-6, filling the chemical cleaning water tank 1 with clear water, and setting the time of the rinsing preparation stage;
(8) rinsing stage
In the stage, a chemical cleaning water inlet valve 4-1, a concentrated water return valve 4-2 and a produced water return valve 4-3 are opened, a chemical cleaning water pump 2 is opened, the tubular membrane of the tubular membrane component 3 is circulated on two sides by clear water, and chemical cleaning liquid in the tubular membrane is cleaned off, wherein the time can be set and is generally 10-30 min;
(9) cleaning liquid emptying phase
Repeating the step (6);
(10) chemical cleaning is finished
And closing all valves and the water pump, and finishing the cleaning.
The utility model discloses a colliery tubular membrane chemical cleaning device is equipped with PLC autonomous system, can realize the unmanned on duty's in the pit function; all electrical equipment has dustproof, waterproof and explosion-proof functions (the equipment and instruments are provided with coal safety certification, and products of the coal safety certification have the dustproof, explosion-proof and waterproof functions); the material of the main body of the device is 316L or carbon steel lining plastic; the method has the characteristics of convenience in underground installation, disassembly and transportation, acid and alkali resistance, flame retardance, safety, explosion prevention, small occupied area, simplicity and convenience in operation, automatic control, unattended operation, modularization and the like, is mainly applied to chemical cleaning of the tubular membrane in treatment and recycling of the underground mine wastewater of the coal mine, and can ensure that the flux of the tubular membrane after the chemical cleaning is recovered to be more than 90% of the initial value, so that the tubular membrane can be ensured to run continuously and stably for a long time underground.
Claims (10)
1. A chemical cleaning device for coal mine down-pipe membrane water treatment is characterized in that: the device comprises a chemical cleaning water tank, a chemical cleaning water pump, a tubular membrane component, a chemical cleaning water inlet valve, a concentrated water reflux valve, a produced water reflux valve, an upper discharge valve, a lower discharge valve, a chemical cleaning blow-down valve and a quick plug-in hose; one end of the chemical cleaning water pump is connected with the chemical cleaning water tank through a pipeline, and the other end of the chemical cleaning water pump is connected with one end of the tubular membrane component through a quick plug-in hose and a chemical cleaning water inlet valve; the bottom end of the chemical cleaning water tank is provided with a sewage outlet which is connected with a chemical cleaning sewage valve and a quick plug-in hose through a pipeline; the tubular membrane component is designed into five ports, namely a chemical cleaning water inlet end, a concentrated water return end, a produced water return end, an upper discharge end and a lower discharge end; the chemical cleaning water inlet end of the tubular membrane component is connected with the quick plug-in hose through a pipeline and a chemical cleaning water inlet valve, the concentrated water return end of the tubular membrane component is connected with the quick plug-in hose through a pipeline and a concentrated water return valve, the produced water return end of the tubular membrane component is connected with the quick plug-in hose through a pipeline and a produced water return valve, the upper discharge end of the tubular membrane component is connected with the quick plug-in hose through a pipeline and an upper discharge valve and is connected with the chemical cleaning water tank through the quick plug-in hose, and the lower discharge end of the tubular membrane component is connected with the quick plug-in hose through a pipeline and a lower discharge valve.
2. The chemical cleaning device for coal mine down-pipe membrane water treatment according to claim 1, characterized in that: the number of the tubular membrane modules is 3-9 which are connected side by side.
3. The chemical cleaning device for coal mine down-pipe membrane water treatment according to claim 2, characterized in that: the quick plug-in type hose is respectively a water inlet end quick plug-in type hose, a concentrated water end quick plug-in type hose, a water production end quick plug-in type hose, an upper discharge end quick plug-in type hose, a lower discharge end quick plug-in type hose and a chemical cleaning sewage discharge end quick plug-in type hose.
4. The chemical cleaning device for coal mine down-pipe membrane water treatment according to claim 3, characterized in that: the chemical cleaning water inlet end is connected with the water inlet end quick plug-in hose through a pipeline and a chemical cleaning water inlet valve, the concentrated water return end is connected with the concentrated water end quick plug-in hose through a pipeline and a concentrated water return valve, the produced water return end is connected with the produced water end quick plug-in hose through a pipeline and a produced water return valve, the upper discharge end is connected with the upper discharge end quick plug-in hose through a pipeline and an upper discharge valve and is connected with the chemical cleaning water tank through the upper discharge end quick plug-in hose, and the lower discharge end is connected with the lower discharge end quick plug-in hose through a pipeline and a lower discharge valve.
5. The chemical cleaning device for coal mine down-pipe membrane water treatment according to claim 4, characterized in that: the electrified equipment used by the coal mine down-pipe membrane water treatment chemical cleaning device is made of acid-resistant alkali materials.
6. The chemical cleaning device for coal mine downhole membrane water treatment according to claim 5, characterized in that: the acid and alkali resistant material is 316L.
7. The chemical cleaning device for coal mine down-pipe membrane water treatment according to claim 6, characterized in that: the electrified equipment is a centrifugal pump and an electromagnetic valve.
8. The chemical cleaning device for coal mine down-pipe membrane water treatment according to claim 7, characterized in that: the quick plug-in hose is an anti-static composite hose special for a coal mine.
9. The chemical cleaning device for coal mine downhole membrane water treatment according to claim 8, characterized in that: the two ends of the quick plug-in hose are provided with MT986 mining U-shaped pin type quick joint male ends.
10. The chemical cleaning device for coal mine downhole membrane water treatment according to claim 9, characterized in that: the chemical cleaning water tank and the tubular membrane component are respectively and independently formed into modules; can be respectively placed in the explosion-proof box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921979459.5U CN211733922U (en) | 2019-11-16 | 2019-11-16 | Coal mine down-pipe type membrane water treatment chemical cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921979459.5U CN211733922U (en) | 2019-11-16 | 2019-11-16 | Coal mine down-pipe type membrane water treatment chemical cleaning device |
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| Publication Number | Publication Date |
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| CN211733922U true CN211733922U (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921979459.5U Active CN211733922U (en) | 2019-11-16 | 2019-11-16 | Coal mine down-pipe type membrane water treatment chemical cleaning device |
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| CN (1) | CN211733922U (en) |
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- 2019-11-16 CN CN201921979459.5U patent/CN211733922U/en active Active
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