CN210974316U

CN210974316U - Papermaking wastewater recycling treatment device

Info

Publication number: CN210974316U
Application number: CN201921516788.6U
Authority: CN
Inventors: 于玉彬; 周凯迪; 徐融; 王旭平
Original assignee: Suzhou Suke Environmental Protection Science & Technology Co ltd
Current assignee: Suzhou Suke Environmental Protection Science & Technology Co ltd
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2020-07-10
Anticipated expiration: 2029-09-12

Abstract

The utility model discloses a papermaking waste water retrieval and utilization processing apparatus, its characterized in that: comprises a coagulating sedimentation tank (1), a PACT tank (2), an MBR tank (3) and a clean water tank (4) which are arranged in sequence along the water inlet direction; the coagulation sedimentation tank (1) is connected to the PACT tank (2) through a PACT tank water inlet pipe (5), the PACT tank (2) is connected to the MBR tank (3) through an MBR tank water inlet pipe (6), a plurality of membrane boxes (7) are arranged in the MBR tank (3), and the plurality of membrane boxes (7) are connected to the clean water tank (4) through a water production pipeline (8); PACT pond (2) bottom is equipped with first aeration equipment (9), MBR pond (3) bottom is equipped with second aeration equipment (10), first aeration equipment (9), second aeration equipment (10) are connected to aeration systems. The utility model provides a papermaking waste water retrieval and utilization processing apparatus, the working costs is low, can make waste water discharge to reach standard.

Description

Papermaking wastewater recycling treatment device

Technical Field

The utility model belongs to the technical field of sewage treatment, in particular to papermaking waste water retrieval and utilization processing apparatus.

Background

Papermaking wastewater is one of the main pollution sources of water pollution, and has great influence on the development of the papermaking industry and the treatment of water pollution in China. The waste paper regeneration paper making has the advantages of saving fiber raw materials, reducing environmental pollution and the like, so the waste paper regeneration paper making is advocated by the paper making industry. The problem of water pollution in the waste paper papermaking industry is always a focus of social attention and a focus of pollution control field.

The treatment of the papermaking wastewater generally mainly comprises primary physicochemical treatment and secondary biochemical treatment. The problem that the water quality of the papermaking wastewater is difficult to stably discharge or recycle after reaching the standard is solved, and the problem is mainly reflected in that the content of organic matters exceeds the standard and the chroma exceeds the standard. The biochemical property of the papermaking wastewater is low after the secondary biochemical treatment, and the advanced treatment of the papermaking wastewater is mainly a physicochemical method, such as flocculation precipitation, activated carbon adsorption, membrane filtration, Fenton advanced oxidation and the like. However, these several treatments have their own drawbacks. The waste paper making wastewater is subjected to advanced treatment by using flocculation precipitation or membrane filtration as a main treatment process, the removal amount of organic matters is limited, and the treated effluent of the processes can hardly meet the treatment requirement along with the continuous improvement of national discharge and recycling standards; the waste paper making wastewater is treated by an activated carbon adsorption process, the requirement of effluent reaching the standard can be met by controlling the adding amount of activated carbon to be continuously increased, but the operation cost is greatly increased; the Fenton advanced oxidation method is a strong oxidation system, has good treatment effect on waste paper papermaking wastewater, and is widely applied to the waste paper papermaking industry at present, but the Fenton process also has the problems of high treatment labor intensity (concentration control and mixing of hydrogen peroxide and ferrous sulfate), high control difficulty (concentration ratio, pH, reaction time, stirring intensity and the like), high operation cost (treatment cost of various medicaments and sludge), high corrosivity and the like, and restricts the use and development of the Fenton process to a certain extent.

Disclosure of Invention

The utility model aims at providing a papermaking waste water retrieval and utilization processing apparatus for papermaking waste water's processing, the working costs is low, can make waste water discharge to reach standard.

Based on the above problem, the utility model provides a technical scheme is:

the papermaking wastewater recycling treatment device comprises a coagulating sedimentation tank, a PACT tank, an MBR tank and a clean water tank which are sequentially arranged along the water inlet direction;

the coagulation sedimentation tank is connected to the PACT tank through a PACT tank water inlet pipe, the PACT tank is connected to the MBR tank through an MBR tank water inlet pipe, a plurality of membrane boxes are arranged in the MBR tank, and the membrane boxes are connected to the clean water tank through water production pipelines;

PACT bottom of the pool portion is equipped with first aeration equipment, MBR bottom of the pool portion is equipped with second aeration equipment, first aeration equipment, second aeration equipment are connected to aeration system.

In some embodiments, a first manual valve, a water inlet pump, a water inlet check valve, an electric water inlet valve, a second manual valve and a water inlet flow meter are sequentially arranged on the water inlet pipe of the MBR tank along the water inlet direction.

In some embodiments, the first manual valve and the second manual valve are ball valves, the electrically operated valve for water inlet is an electrically operated ball valve, and the flow meter for water inlet is an electromagnetic flow meter.

In some embodiments, the PACT cell is connected to an activated carbon dosing device.

In some embodiments thereof, the aeration system comprises an aeration fan, an aeration main connected to the aeration fan, and first and second aeration legs connected to the aeration main, the first aeration leg being connected to the first aeration device, the second aeration leg being connected to the second aeration device; the aeration main pipe is provided with a first aeration valve and a first pressure gauge along the air inlet direction, the first aeration branch pipe is provided with a second aeration valve and a first aeration flow meter along the air inlet direction, and the second aeration branch pipe is provided with a third aeration valve and a second aeration flow meter along the air inlet direction.

In some embodiments, a second pressure gauge, a water production electric valve, a third manual valve, a water production pump, a water production check valve, a fourth manual valve and a water production flow meter are sequentially arranged on the water production pipeline along the water outlet direction.

In some embodiments, the water producing electric valve is an electric ball valve, the third manual valve and the fourth manual valve are ball valves, and the water producing flow meter is an electromagnetic flow meter.

In some embodiments, the water production pipe is further connected with a drug washing system, the drug washing system comprises a drug washing main pipe, an acid washing pipeline and an alkali washing pipeline which are connected to the drug washing main pipe, an acid washing medicine box connected to the acid washing pipeline, and an alkali washing medicine box connected to the alkali washing pipeline, the drug washing main pipe is provided with a drug washing electric valve, the acid washing pipeline is sequentially provided with a fifth manual valve, an acid washing pump, a sixth manual valve and a first filter along a drug feeding direction, and the alkali washing pipeline is sequentially provided with a seventh manual valve, an alkali washing pump, an eighth manual valve and a second filter along the drug feeding direction.

In some embodiments, the upper portion of the MBR tank is connected to the PACT tank via an overflow pipe.

In some of them embodiments, still include row's mud system, arrange the mud system including the mud pump, be connected to the row's mud house steward of mud pump and be connected to row's mud house steward's first row of mud branch pipe and second row of mud branch pipe, first row of mud branch pipe is connected to coagulating sedimentation tank's bottom, the second row of mud branch pipe is connected to the bottom in MBR pond, be equipped with row's mud hand valve on first row of mud branch pipe, the second row of mud branch pipe respectively.

Compared with the prior art, the utility model has the advantages that:

adopt the technical scheme of the utility model, papermaking waste water enters into the PACT pond after coagulating sedimentation, handles the back through the active carbon, filters and biodegradable through the MBR technology, can effectively handle papermaking waste water, discharge to reach standard.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a process flow diagram of an embodiment of the recycling treatment device for papermaking wastewater of the present invention;

FIG. 2 is a block diagram of a process flow of an embodiment of the present invention;

wherein:

1. a coagulating sedimentation tank; 2. a PACT pool; 3. an MBR tank; 4. a clean water tank; 5. a PACT pool water inlet pipe; 6. a water inlet pipe of the MBR tank; 7. a membrane box; 8. a water production pipeline; 9. a first aeration device; 10. a second aeration device; 11. a first manual valve; 12. a water inlet pump; 13. a water inlet check valve; 14. an electric valve for water inlet; 15. a second manual valve; 16. a water inlet flow meter; 17. a second pressure gauge; 18. an electric valve for producing water; 19. a third manual valve; 20. a water production pump; 21. a water production check valve; 22. a fourth manual valve; 23. a produced water flow meter; 24. an aeration fan; 25. an aeration main pipe; 26. a first aeration valve; 27. a first pressure gauge; 28. a first aeration branch pipe; 29. a second aeration valve; 30. a first aeration flow meter; 31. a second aeration branch pipe; 32. a third aeration valve; 33. a second aeration flow meter; 34. washing a main pipe with the medicine; 35. washing the valve with medicine; 36. pickling a pipeline; 37. acid washing medicine chest; 38. a fifth manual valve; 39. a pickling pump; 40. a sixth manual valve; 41. a first filter; 42. washing a pipeline with alkali; 43. an alkali washing medicine box; 44. a seventh manual valve; 45. an alkaline washing pump; 46. an eighth manual valve; 47. a second filter; 48. an activated carbon adding device; 49. an overflow pipe; 50. a mud discharge main pipe; 51. a sludge discharge pump; 52. a first sludge discharge branch pipe; 53. a second sludge discharge branch pipe; 54. manual mud valve.

Detailed Description

The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present invention. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments.

Referring to fig. 1-2, for the process flow diagram of the embodiment of the present invention, a recycling treatment device for papermaking wastewater is provided, which comprises a coagulation sedimentation tank 1, a PACT tank 2, an MBR tank 3 and a clean water tank 4, which are sequentially arranged along the water inlet direction, wherein the coagulation sedimentation tank 1 is connected to the PACT tank 2 through a PACT tank water inlet pipe 5, the PACT tank 2 is connected to the MBR tank 3 through a MBR tank water inlet pipe 6, a plurality of membrane boxes 7 are arranged in the MBR tank 3, and the plurality of membrane boxes 7 are connected to the clean water tank 4 through a product water pipeline 8; the bottom of the PACT tank 2 is provided with a first aeration device 9, the bottom of the MBR tank 3 is provided with a second aeration device 10, and the first aeration device 9 and the second aeration device 10 are connected to an aeration system.

Be equipped with first manual valve 11, the intake pump 12, the check valve 1314 that intakes, the electric valve that intakes, the manual valve 15 of second, intake flowmeter 16 along the direction of intaking in proper order on MBR inlet tube 6, wherein first manual valve 11, the manual valve 15 of second is the ball valve, intake electric valve 14 is electric ball valve, intake flowmeter 16 is electric flowmeter, intake pump 12, electric ball valve, electric flowmeter is connected with the control system electricity, realize the automatic control of intaking, and gather flow data in real time.

In this example, the first aeration apparatus 9 and the second aeration apparatus 10 are perforated aeration pipes, the aeration system includes an aeration fan 24, an aeration main 25 connected to the aeration fan 24, and a first aeration branch pipe 28 and a second aeration branch pipe 31 connected to the aeration main 25, the first aeration branch pipe 28 is connected to the first aeration apparatus 9, and the second aeration branch pipe 31 is connected to the second aeration apparatus 10. A first aeration valve 26 and a first pressure gauge 27 are arranged on the aeration main pipe 25 along the air inlet direction, a second aeration valve 29 and a first aeration flow meter 30 are arranged on the first aeration branch pipe 28 along the air inlet direction, and a third aeration valve 32 and a second aeration flow meter 33 are arranged on the second aeration branch pipe 31 along the air inlet direction.

The water production pipeline 8 is sequentially provided with a second pressure gauge 17, a water production electric valve 18, a third manual valve 19, a water production pump 20, a water production check valve 21, a fourth manual valve 22 and a water production flow meter 23 along the water outlet direction, the second pressure gauge 17 is a positive pressure gauge and a negative pressure gauge, the water production operation transmembrane pressure difference can be detected, and the drug washing pressure can also be displayed. The water production electric valve 18 is an electric ball valve, the third manual valve 19 and the fourth manual valve 22 are ball valves, the water production flowmeter 23 is an electromagnetic flowmeter, and the water production pump 20, the water production electric valve 21 and the water production flowmeter 23 are electrically connected with a control system, so that the automatic control of water production is realized, and the water production flow is monitored in real time.

In this embodiment, a drug washing system is further provided for performing drug washing on the membrane tank 7 in the MBR tank 3, the drug washing system includes a drug washing main pipe 34, an acid washing pipeline 36 and an alkali washing pipeline 42 connected to the drug washing main pipe 34, an acid washing drug box 37 connected to the acid washing pipeline 36, and an alkali washing drug box 43 connected to the alkali washing pipeline 42, the drug washing main pipe 34 is connected to a pipe section of the water production pipeline 8 between the second pressure gauge 17 and the water production electric valve 18, the drug washing main pipe 34 is provided with a drug washing valve 35, and the drug washing valve 35 is an electric ball valve. The acid washing pipeline 36 is provided with a fifth manual valve 38, an acid washing pump 39, a sixth manual valve 40 and a first filter 41 in sequence along the pesticide feeding direction, and the alkali washing pipeline 42 is provided with a seventh manual valve 44, an alkali washing pump 45, an eighth manual valve 46 and a second filter 47 in sequence along the pesticide feeding direction. The first filter 41 and the second filter 47 can filter impurities in the medicament, so that membrane threads in the membrane box are prevented from being damaged.

The upper part of the MBR tank 3 is connected to the PACT tank 2 through an overflow pipe 49, and sewage in the MBR tank 3 can overflow into the PACT tank 2.

Still be equipped with row mud system for to coagulating sedimentation tank 1 and MBR pond 3 regularly arrange mud, thereby control 3 mud concentrations in MBR pond can guarantee good biochemical effect and improve the treatment effeciency. This row's mud system includes mud pump 51, is connected to mud pump 51's row's mud house steward 50, and is connected to row's mud house steward 50 first row's mud branch pipe 52 and second row's mud branch pipe 53, and first row's mud branch pipe 52 is connected to coagulating sedimentation tank 1 bottom, and second row's mud branch pipe 53 is connected to MBR pond 3 bottom, is equipped with row's mud manual valve 54 on first row's mud branch pipe 52, second row's mud branch pipe 53 respectively.

In the embodiment, the PTFE hollow fiber membrane filaments are adopted in the membrane box 7 and are made of 100% PTFE porous materials, so that compared with other MBR membranes such as PVDF, PE, PP and the like at home and abroad, the membrane box has permanent hydrophilicity, can better resist pollution, has higher system sludge concentration and has lower membrane component cleaning frequency; the membrane wire material has good quality, bending strength and longer service life, the PTFE membrane can normally run continuously within 5 years due to the excellent hydrophilicity and tensile strength, the actual service life is more than 10 years, and the actual cost performance is far higher than that of other MBR membranes; the chemical agent has strong tolerance, and can completely recover the water flux; oil resistance and organic solvent resistance; can be stored in a dry mode, is more convenient for system shutdown maintenance, storage and cleaning, is simple and convenient to operate, and saves medicaments

The PACT tank 2 is connected with an active carbon adding device 48 for adding active carbon into the PACT tank 2, the powdered active carbon in the active carbon adding device 48 adopts 200-mesh powdered wooden coconut shell active carbon, the iodine adsorption value of the active carbon is 800 mg/L, the water content is less than or equal to 15 percent, and the filling specific gravity is 0.5-0.55g/cm³The biological carrier has good mesopore volume and specific surface area, can provide a large number of biological carrier attachment points, and plays a good biological carrier strengthening role in the PACT process.

The treatment device is adopted to treat the papermaking wastewater, the concentration of the powdered activated carbon is controlled to be 500-1000 mg/L, the COD of the produced water can be reduced to 50 mg/L, the discharge and reuse standards are met, when the concentration of the activated carbon is 500 mg/L, the operating cost of the activated carbon per ton of water is 0.27 yuan, and the operating cost of the PACT-MBR process per ton of water is 0.6 yuan, so that compared with the deep treatment processes such as Fenton, the operating cost of the PACT-MBR treatment process is more advantageous, and the PACT tank and the MBR tank are separated, so that the later-stage engineering reconstruction is facilitated.

The above examples are only for illustrating the technical conception and the features of the present invention, and the purpose thereof is to enable one skilled in the art to understand the contents of the present invention and to implement the present invention, which should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. Papermaking waste water retrieval and utilization processing apparatus, its characterized in that: comprises a coagulating sedimentation tank (1), a PACT tank (2), an MBR tank (3) and a clean water tank (4) which are arranged in sequence along the water inlet direction;

the coagulation sedimentation tank (1) is connected to the PACT tank (2) through a PACT tank water inlet pipe (5), the PACT tank (2) is connected to the MBR tank (3) through an MBR tank water inlet pipe (6), a plurality of membrane boxes (7) are arranged in the MBR tank (3), and the plurality of membrane boxes (7) are connected to the clean water tank (4) through a water production pipeline (8);

PACT pond (2) bottom is equipped with first aeration equipment (9), MBR pond (3) bottom is equipped with second aeration equipment (10), first aeration equipment (9), second aeration equipment (10) are connected to aeration systems.

2. The recycling treatment device for papermaking wastewater according to claim 1, characterized in that: the MBR tank water inlet pipe (6) is provided with a first manual valve (11), a water inlet pump (12), a water inlet check valve (13), a water inlet electric valve (14), a second manual valve (15) and a water inlet flow meter (16) in sequence along the water inlet direction.

3. The recycling treatment device for papermaking wastewater according to claim 2, characterized in that: the first manual valve (11) and the second manual valve (15) are ball valves, the electric water inlet valve (14) is an electric ball valve, and the water inlet flow meter (16) is an electromagnetic flow meter.

4. The recycling treatment device for papermaking wastewater according to claim 1, characterized in that: the PACT tank (2) is connected with an activated carbon adding device (48).

5. The recycling treatment device for papermaking wastewater according to claim 1, characterized in that: the aeration system comprises an aeration fan (24), an aeration main pipe (25) connected to the aeration fan (24), and a first aeration branch pipe (28) and a second aeration branch pipe (31) connected to the aeration main pipe (25), wherein the first aeration branch pipe (28) is connected to the first aeration device (9), and the second aeration branch pipe (31) is connected to the second aeration device (10); the aeration main pipe (25) is provided with a first aeration valve (26) and a first pressure gauge (27) along the air inlet direction, the first aeration branch pipe (28) is provided with a second aeration valve (29) and a first aeration flow meter (30) along the air inlet direction, and the second aeration branch pipe (31) is provided with a third aeration valve (32) and a second aeration flow meter (33) along the air inlet direction.

6. The recycling treatment device for papermaking wastewater according to claim 1, characterized in that: and a second pressure gauge (17), a water production electric valve (18), a third manual valve (19), a water production pump (20), a water production check valve (21), a fourth manual valve (22) and a water production flowmeter (23) are sequentially arranged on the water production pipeline (8) along the water outlet direction.

7. The recycling treatment device for papermaking wastewater according to claim 6, characterized in that: the water production electric valve (18) is an electric ball valve, the third manual valve (19) and the fourth manual valve (22) are ball valves, and the water production flow meter (23) is an electromagnetic flow meter.

8. The recycling treatment device for papermaking wastewater according to claim 1, characterized in that: the water production pipe is further connected with a drug washing system, the drug washing system comprises a drug washing main pipe (34), a pickling pipeline (36) and an alkaline washing pipeline (42) which are connected to the drug washing main pipe (34), a pickling medicine box (37) which is connected to the pickling pipeline (36), and an alkaline washing medicine box (43) which is connected to the alkaline washing pipeline (42), a drug washing valve (35) is arranged on the drug washing main pipe (34), a fifth manual valve (38), a pickling pump (39), a sixth manual valve (40) and a first filter (41) are sequentially arranged on the pickling pipeline (36) along the drug feeding direction, and a seventh manual valve (44), an alkaline washing pump (45), an eighth manual valve (46) and a second filter (47) are sequentially arranged on the alkaline washing pipeline (42) along the drug feeding direction.

9. The recycling treatment device for papermaking wastewater according to claim 1, characterized in that: the upper part of the MBR tank (3) is connected to the PACT tank (2) through an overflow pipe (49).

10. The recycling treatment device for papermaking wastewater according to claim 1, characterized in that: still including arranging the mud system, arrange the mud system including mud pump (51), be connected to the row mud house steward (50) of mud pump (51) and be connected to first row mud branch pipe (52) and second row mud branch pipe (53) of arranging mud house steward (50), first row mud branch pipe (52) are connected to the bottom of coagulating sedimentation tank (1), second row mud branch pipe (53) are connected to the bottom of MBR pond (3), be equipped with row mud hand valve (54) on first row mud branch pipe (52), the second row mud branch pipe (53) respectively.