Full-automatic sewage treatment system and treatment method thereof

Abstract

The invention discloses a full-automatic sewage treatment system and a treatment method thereof.The full-automatic sewage treatment system comprises a sewage collecting pool, a plurality of material storage stirring barrels, a filter press and a water storage barrel, the sewage collecting pool, the material storage stirring barrels, the filter press and the water storage barrel are communicated through pipelines and pumps, the material storage stirring barrels are arranged in the sewage collecting pool, and the material storage stirring barrels are arranged in the water storage barrel. Each storage stirring barrel is provided with a feeding mechanism, each feeding mechanism comprises a base and a stock bin, aluminum sulfate is arranged in each stock bin, and the aluminum sulfate is conveyed to the corresponding storage stirring barrel through a conveying pipe at the bottom of each stock bin; a screw mechanism is arranged at the bottom of the stock bin and is controlled by a speed reducing motor; a weighing sensor is also arranged on the base; the whole system is controlled by the PLC control cabinet. Full-automatic integrated operations such as automatic feeding, timed stirring, precipitation and filter pressing are carried out through liquid level control, the working efficiency is high, the qualified rate of sewage treatment is 100%, and the environmental protection requirement is comprehensively met.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment, and in particular to a fully automatic sewage treatment system and a treatment method thereof. Background Art

[0002] At present, the manufacturing process of PTC heating sheets adopts the wet batching method, which requires adding a certain proportion of deionized water to the raw materials. After the batching is completed, a filter press is used to squeeze out the water. A large amount of wastewater is generated during the squeezing process, and a certain proportion of aluminum sulfate needs to be added for sewage treatment. Before the equipment was improved, sewage was added to the treatment barrel manually, chemicals were added manually, and stirring was started manually. There were a series of problems such as inaccurate water volume control, inaccurate addition of chemicals, inaccurate stirring time control, and the treatment process did not meet the requirements. As a result, the discharge to the sewage outlet is sometimes unqualified. There are great hidden dangers to environmental protection issues, and manual operation is inefficient. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a fully automatic sewage treatment system and a treatment method thereof. After the sewage pool reaches the liquid level, it is lifted into a stirring treatment barrel, and automatic feeding, timed stirring, sedimentation, filter pressing and other fully automatic integrated operations are performed through liquid level control. The working efficiency is high, the sewage treatment qualification rate is 100%, and the environmental protection requirements are fully met.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fully automatic sewage treatment system, comprising a sewage collection tank, a storage stirring barrel, a filter press and a water storage barrel, wherein the sewage collection tank, the storage stirring barrel, the filter press and the water storage barrel are connected through pipelines and pumps, the storage stirring barrels include a plurality of storage stirring barrels, each of which is provided with a feeding mechanism, the feeding mechanism includes a base and a silo, the silo is provided with aluminum sulfate, and the aluminum sulfate is transported to the storage stirring barrel through a conveying pipe at the bottom of the silo; a spiral mechanism is provided at the bottom of the silo, which is controlled by a reduction motor; a weighing sensor is also provided on the base; the entire system is controlled by a PLC control cabinet.

[0005] As a further improvement, a cover is provided on the top of the silo and a vibration motor is provided on the side.

[0006] As a preference, a stirring device is provided in the material storage stirring barrel, and the stirring device comprises a stirring rod and a stirring motor.

[0007] As a further improvement, liquid level transmitters are provided in the material storage mixing barrel and the water storage barrel.

[0008] As a preference, the filter press comprises a primary filter press unit and a secondary filter press unit.

[0009] Preferably, the water storage barrel comprises a primary water storage barrel and a secondary water storage barrel.

[0010] As a further improvement, the sewage collection tank includes three sedimentation tanks and a sewage tank, and a liquid level meter is provided in the sewage tank. The three sedimentation tanks are mainly used to precipitate solids in the sewage, and the number of times the filter cloth needs to be replaced during the filter pressing process is reduced.

[0011] As a preferred embodiment, the PLC control cabinet is provided with control buttons and a touch display screen.

[0012] A treatment method of the fully automatic sewage treatment system as described above,

[0013] First, set various parameters through the PLC control cabinet;

[0014] Second, the sewage enters the first storage mixing barrel through the sewage lifting pump. When the sewage in the first storage mixing barrel reaches the water level of the set parameters, the feeding mechanism on the first storage mixing barrel starts to add aluminum sulfate into the first storage mixing barrel. When the water level in the first storage mixing barrel reaches the maximum value, its water inlet valve is closed; then the sewage enters the second storage mixing barrel. When the sewage in the second storage mixing barrel reaches the water level of the set parameters, its feeding mechanism starts to add aluminum sulfate into the second storage mixing barrel until the water level in the last storage mixing barrel reaches the maximum value;

[0015] Third, when all the storage mixing barrels are filled with sewage, start the stirring motor on each storage mixing barrel at the same time, the stirring time is 3-4 minutes, and then start sedimentation, the sedimentation time is 13-16 minutes;

[0016] Fourth, when the set sedimentation time is reached, the water outlet pneumatic valve of the storage mixing barrel is opened, and the valve is opened to feedback the opening signal, the first-level filter press pump is started, and the sewage is pumped into the first-level filter press unit; after the first-level filter press unit is completed, the sewage enters the first-level water storage barrel; when the liquid level of the first-level water storage barrel reaches the water level of the set parameters, the second-level filter press pump is started, and the sewage is pumped into the second-level filter press unit; after the second-level filter press unit is completed, the sewage that meets the indicators enters the second-level water storage barrel and is discharged by the drainage pump.

[0017] The water inlet valves of the first-stage filter press unit and the second-stage filter press unit are both pneumatic valves and are provided with signal feedback devices.

[0018] The feeding mechanism of the present invention uses a weight quantitative weight loss control method to accurately feed the aluminum sulfate powder in the silo into the storage mixing barrel by means of spiral conveying. After the feeding is completed, the stirring is started, and the stirring stops and the sedimentation is performed after the set time is reached. After the sedimentation time is reached, the sewage is transported to the filter press by a pump for sewage treatment. The whole set of equipment is controlled by a PLC control cabinet. The reduction motor of the feeding mechanism adopts a frequency converter multi-stage speed control, and is decelerated to a low frequency before the material is unloaded to accurately control the feeding amount. The frequency converter is installed in the PLC control cabinet, and the control cabinet is installed with a PLC, a weighing controller, a weighing transmitter, a touch screen, a circuit breaker, a relay, etc. Pneumatic ball valves are installed at the water inlet and outlet of the storage mixing barrel for automatic control of water inlet and outlet.

[0019] The filter press of the present invention adopts a one-on-one-standby scheme, and pneumatic solenoid valves are installed on the inlet and outlet water pipes to automatically open the equipment required to be started.

[0020] The beneficial effects of the present invention are as follows: a set of sewage treatment equipment is formed by a sewage treatment mixing barrel, a liquid level sensor, a feeding mechanism with weighing, a weighing control instrument, a pneumatic valve, a pump group, and a filter press. The fully automatic integrated operation is realized through the control of sensors and pneumatic valves. The working efficiency is high, and the qualified rate of sewage treatment is 100%, which fully meets the environmental protection requirements. The present invention is fully automatic control, and no operation is required when there is no fault alarm. Reduce costs and improve the working environment. The sewage treatment adopts the secondary filter press method, and the sewage that passes through the filter press for the first time is filtered again to filter out excess large particles. The weighing sensor on the base of the feeding mechanism can feedback data to accurately control the feeding amount. A vibration motor is provided on the side of the silo to effectively solve the void phenomenon caused by aluminum sulfate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0022] Figure 2 It is a structural schematic diagram of a feeding mechanism of an embodiment of the invention;

[0023] Figure 3 It is a top view schematic diagram of the spiral mechanism of the embodiment of the invention;

[0024] Figure 4 It is a schematic structural diagram of a sewage collection tank according to an embodiment of the invention.

[0025] In the figure: 1. Sewage collection tank; 2. Storage and mixing barrel; 3. Feeding mechanism; 4. Base; 5. Silo; 6. Delivery pipe; 7. Screw mechanism; 8. Gear motor; 9. PLC control cabinet; 10. Secondary filter press pump; 11. Cover; 12. Vibration motor; 13. Stirring rod; 14. Stirring motor; 15. Liquid level transmitter; 16. Primary filter press unit; 17. Secondary filter press unit; 18. Primary water storage barrel; 19. Secondary water storage barrel; 20. Sewage lifting pump; 21. Liquid level meter; 22. Sewage tank; 23. Sedimentation tank; 24. Drainage pump; 25. Primary filter press pump. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1: A fully automatic sewage treatment system, including a sewage collection tank 1, a storage mixing barrel 2, a filter press and a water storage barrel, wherein the sewage collection tank 1, the storage mixing barrel, the filter press and the water storage barrel are connected through pipes and pumps, wherein the filter press includes a primary filter press unit 16 and a secondary filter press unit 17; the water storage barrel includes a primary water storage barrel 18 and a secondary water storage barrel 19. The storage mixing barrel 2 includes a plurality of storage mixing barrels, each of which is provided with a feeding mechanism 3, the feeding mechanism 3 includes a base 4 and a silo 5, the silo 5 is provided with aluminum sulfate, and the aluminum sulfate is transported to the storage mixing barrel 2 through a conveying pipe 6 at the bottom of the silo; the bottom of the silo 5 is provided with a spiral mechanism 7, which is controlled by a reduction motor 8; the base 4 is also provided with a weighing sensor; the whole system is controlled by a PLC control cabinet 9. The top of the silo 5 is provided with a cover 11, and the side is provided with a vibration motor 12. The PLC control cabinet 9 is provided with control buttons and a touch display screen.

[0028] The material storage mixing barrel 2 is provided with a stirring device, and the stirring device includes a stirring rod 13 and a stirring motor 14. The material storage mixing barrel 2 and the water storage barrel are both provided with a liquid level transmitter 15.

[0029] like Figure 4 As shown, the sewage collection tank 1 includes three sedimentation tanks 23 and a sewage tank 22, and a liquid level meter 21 is provided in the sewage tank 22.

[0030] Implementation of Full 2: A treatment method for a fully automatic sewage treatment system,

[0031] First, set various parameters through the PLC control cabinet 9;

[0032] Second, the sewage enters the first storage mixing barrel 2 through the sewage lifting pump 20. When the sewage in the first storage mixing barrel 2 reaches a water level of 1500 mm, the feeding mechanism 3 on the first storage mixing barrel 2 is started to add 0.5 kg of aluminum sulfate to the first storage mixing barrel 2. When the water level of the first storage mixing barrel 2 reaches 1650 mm, its water inlet valve is closed; then the sewage enters the second storage mixing barrel 2. When the sewage in the second storage mixing barrel 2 reaches a water level of 1500 mm, its feeding mechanism 3 is started to add aluminum sulfate to the second storage mixing barrel 2 until the water level of the last storage mixing barrel 2 reaches 1650 mm.

[0033] Third, when all the storage mixing barrels 2 are filled with sewage, the stirring motor 14 on each storage mixing barrel 2 is turned on at the same time, the stirring time is 3 minutes, and then the sedimentation is started, and the sedimentation time is 15 minutes;

[0034] Fourth, when the set sedimentation time is reached, the water outlet pneumatic valve of the storage mixing barrel 2 is opened, and the valve is opened to feedback the opening signal, the primary filter press pump 25 is started, and the sewage is pumped into the primary filter press unit 16; after the primary filter press unit 16 is completed, the sewage enters the primary water storage barrel 18; when the liquid level of the primary water storage barrel 18 reaches 500mm, the secondary filter press pump 10 is started, and the sewage is pumped into the secondary filter press unit 17; after the secondary filter press unit 17 is completed, the sewage that meets the index enters the secondary water storage barrel 19 and is discharged by the drainage pump 24. After the secondary filter press unit 17 discharges water, it enters the secondary filter press barrel 19, and the water level of the secondary filter press barrel 19 is set at 500mm. When the liquid level is greater than 500mm, the drainage pump 24 is started, and when the liquid level is lower than 200mm, the discharge pump stops working. The whole process now turns on the button switches of each pump on the control cabinet 9, and the full-automatic operation is performed through the liquid level meter control method.

[0035] The water inlet valves of the first filter press unit 16 and the second filter press unit 17 are both pneumatic valves and are provided with a signal feedback device. If the filter press water inlet valve opening signal is not detected, the first filter press filter pump cannot be turned on and an alarm signal is generated. The entire control process and the switch signal are displayed on the control screen of the main control cabinet.

Claims

1. A fully automatic sewage treatment system, comprising a sewage collection tank (1), a material storage and stirring barrel (2), a filter press and a water storage barrel, wherein the sewage collection tank (1), the material storage and stirring barrel, the filter press and the water storage barrel are all connected by pipelines and pumps. Features: The material storage and stirring barrels (2) include a plurality of material storage and stirring barrels (2), each of which is provided with a feeding mechanism (3), the feeding mechanism (3) including a base (4) and a silo (5), the silo (5) is provided with aluminum sulfate, and the aluminum sulfate is transported to the material storage and stirring barrel (2) through a conveying pipe (6) at the bottom of the silo; a spiral mechanism (7) is provided at the bottom of the silo (5), and is controlled by a reduction motor (8); a weighing sensor is also provided on the base (4); and the entire system is controlled by a PLC control cabinet (9).

2. The fully automatic sewage treatment system according to claim 1, Features: The top of the silo (5) is provided with a cover (11) and the side is provided with a vibration motor (12).

3. The fully automatic sewage treatment system according to claim 1, Features: The material storage stirring barrel (2) is provided with a stirring device, and the stirring device comprises a stirring rod (13) and a stirring motor (14).

4. The fully automatic sewage treatment system according to claim 1, Features: The material storage and stirring barrel (2) and the water storage barrel are both provided with a liquid level transmitter (15).

5. The fully automatic sewage treatment system according to claim 1, Features: The filter press comprises a primary filter press unit (16) and a secondary filter press unit (17).

6. The fully automatic sewage treatment system according to claim 1, Features: The water storage barrel comprises a primary water storage barrel (18) and a secondary water storage barrel (19).

7. The fully automatic sewage treatment system according to claim 1, Features: The sewage collection tank (1) comprises three sedimentation tanks (23) and a sewage tank (22), wherein a liquid level meter (21) is provided in the sewage tank (22).

8. The treatment method of the fully automatic sewage treatment system according to claim 1, Features: The PLC control cabinet (9) is provided with control buttons and a touch display screen.

9. A treatment method of the fully automatic sewage treatment system as claimed in claim 1, Features: First, various parameters are set through the PLC control cabinet (9); Second, the sewage enters the first storage mixing barrel (2) through the sewage lifting pump (20). When the sewage in the first storage mixing barrel (2) reaches the water level of the set parameter, the feeding mechanism (3) on the first storage mixing barrel (2) is started to add aluminum sulfate to the first storage mixing barrel (2). When the water level of the first storage mixing barrel (2) reaches the maximum value, its water inlet valve is closed; then the sewage enters the second storage mixing barrel (2). When the sewage in the second storage mixing barrel (2) reaches the water level of the set parameter, its feeding mechanism (3) is started to add aluminum sulfate to the second storage mixing barrel (2), until the water level of the last storage mixing barrel (2) reaches the maximum value; Third, when all the storage mixing barrels (2) are filled with sewage, the stirring motor (14) on each storage mixing barrel (2) is turned on at the same time, the stirring time is 3-4 minutes, and then the sedimentation is started, and the sedimentation time is 13-16 minutes; Fourth, when the set sedimentation time is reached, the water outlet pneumatic valve of the storage mixing barrel (2) is opened, and after the valve is opened, an opening signal is fed back, the first-level filter press pump (25) is started, and the sewage is pumped into the first-level filter press unit (16); after the first-level filter press unit (16) completes its work, the sewage enters the first-level water storage barrel (18); when the liquid level of the first-level water storage barrel (18) reaches the water level of the set parameters, the second-level filter press pump (10) is started, and the sewage is pumped into the second-level filter press unit (17); after the second-level filter press unit (17) completes its work, the sewage that meets the indicators enters the second-level water storage barrel (19) and is discharged by the drainage pump (24).

10. The treatment method of the fully automatic sewage treatment system according to claim 9, Features: The water inlet valves of the first-stage filter press unit (16) and the second-stage filter press unit (17) are both pneumatic valves and are provided with signal feedback devices.

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