Integrated filtering system and method for industrial wastewater treatment

Abstract

The present invention belongs to the technical field of industrial wastewater treatment, and discloses an integrated industrial wastewater treatment filtration system and method, the integrated industrial wastewater treatment filtration system comprises: an aerobic tank for performing aerobic biological treatment on industrial wastewater and degrading organic pollutants in the wastewater; the water inlet pump is connected with the aerobic tank and is used for lifting and conveying the wastewater treated by the aerobic tank; the stainless steel filter is connected with the water inlet pump and is used for primarily filtering the wastewater and removing large-particle impurities, and the stainless steel filter is a 0.5 mm filter; the stainless steel filter is connected with a water inlet of the purification membrane group through a pipeline, and the purification membrane group is used for deeply filtering the preliminarily filtered wastewater. According to the scheme, the functions of aerobic biological treatment, physical filtration, membrane filtration, gas-water separation, circular treatment, backwashing, aeration, chemical cleaning and the like are integrated, efficient purification of industrial wastewater is achieved, meanwhile, the operation cost is reduced, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial wastewater treatment, and more particularly to an integrated filtering system and method for industrial wastewater treatment. Background Art

[0002] Industrial wastewater contains a large number of harmful substances such as organic pollutants, suspended solids, colloids, and microorganisms. Direct discharge of these substances can cause serious environmental pollution. Traditional wastewater treatment methods typically include physical, chemical, and biological treatment processes, but these methods often suffer from low treatment efficiency, high operating costs, and large space requirements. In recent years, membrane filtration technology has gradually become an important means of industrial wastewater treatment due to its high efficiency, energy conservation, and environmental protection.

[0003] However, existing membrane filtration systems have drawbacks such as severe membrane fouling, complex cleaning and maintenance, and low resource utilization. Therefore, developing an integrated, efficient, and easy-to-maintain industrial wastewater treatment system is of great practical significance. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an integrated filtration system and method for industrial wastewater treatment.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] An integrated filtration system for industrial wastewater treatment, comprising:

[0007] Aerobic tanks are used for aerobic biological treatment of industrial wastewater to degrade organic pollutants in the wastewater;

[0008] A water inlet pump is connected to the aerobic tank and is used to lift and transport the wastewater treated in the aerobic tank;

[0009] A stainless steel filter is connected to the water inlet pump to perform preliminary filtration on the wastewater to remove larger particles of impurities. The stainless steel filter is a 0.5 mm filter;

[0010] Multiple groups of purification membrane groups, the stainless steel filter is connected to the water inlet of the purification membrane group through a pipeline, and the purification membrane group is used to perform deep filtration on the preliminarily filtered wastewater;

[0011] a water production pump connected to the water production port of the purification membrane group for outputting purified water;

[0012] A purified water tank, connected to the water production pump, for storing purified water;

[0013] The gas-water separator is used to separate gas and liquid in wastewater. The water inlet of the gas-water separator is connected to the concentrated water end of the purification membrane group, and the gas outlet of the gas-water separator is connected to the aerobic tank through a pipeline.

[0014] A circulation pump is connected to the liquid outlet of the gas-water separator, and is connected to the connecting pipeline of the water inlet pump and the stainless steel filter through a pipeline to circulate part of the liquid separated by the gas-water separator;

[0015] The cleaning system is used to clean the purification membrane group, and the cleaning system includes a backwash system, an aeration system and a chemical cleaning system.

[0016] As a further solution of the present invention: the backwash system includes a backwash pump, the water inlet end of the backwash pump is connected to the clean water tank through a pipeline, the water outlet end of the backwash pump is connected to a PP filter, and the water outlet end of the PP filter is connected to the upper discharge port of the purification membrane group through a pipeline.

[0017] As a further solution of the present invention: the aeration system includes a Roots blower, and the Roots blower is connected to the aeration port of the purification membrane group through a pipeline.

[0018] As a further solution of the present invention: the upper outlet and the lower outlet of the purification membrane group are connected to a sewage tank through pipelines.

[0019] As a further solution of the present invention: the chemical cleaning system includes a chemical cleaning medicine box, the chemical cleaning medicine box is connected to a cleaning pump through a pipeline, and the cleaning pump is connected to the water inlet of the purification membrane group through a pipeline.

[0020] As a further solution of the present invention: a branch pipe is connected to the pipeline connecting the cleaning pump and the purification membrane group, and the branch pipe is connected to the pipeline connecting the backwash pump and the PP filter.

[0021] The present invention also provides a filtration method for integrated industrial wastewater treatment, comprising the following steps:

[0022] 1. Introduce industrial wastewater into the aerobic pool, and use aerobic microorganisms to degrade organic pollutants in the wastewater to reduce the concentration of organic matter in the wastewater;

[0023] 2. Use the water inlet pump to lift the wastewater treated in the aerobic tank and transport it to the stainless steel filter to remove larger particle impurities in the wastewater;

[0024] 3. The wastewater after preliminary filtration is transported through pipelines to the water inlets of multiple purification membrane groups, which are used to perform deep filtration on the wastewater to remove tiny particles, colloids, microorganisms and organic matter;

[0025] 4. The purified water after filtration by the purification membrane group is discharged through the water outlet and transported to the clean water pool by the water production pump for storage and discharge or reuse as treated water that meets the standards;

[0026] 5. The concentrated water from the purification membrane group is discharged through the concentrated water end and enters the gas-water separator for gas-liquid separation. The separated gas is returned to the aerobic tank through the pipeline, and the separated liquid is sent back to the pipeline between the water inlet pump and the stainless steel filter through the circulation pump for circulation treatment;

[0027] 6. Start the backwash system regularly, and use the backwash pump to transport the purified water in the clean water tank to the PP filter. The filtered water enters the purification membrane group from the upper outlet through the pipeline to reversely flush the purification membrane group to remove pollutants attached to the membrane surface;

[0028] 7. Start the aeration system and introduce air into the aeration port of the purification membrane group through the Roots blower. The flushing effect of the bubbles will slow down the deposition of pollutants on the membrane surface and maintain the filtration performance of the membrane.

[0029] 8. When the purification membrane group is seriously polluted, start the chemical cleaning system, and use the cleaning pump to transport the chemical cleaning agent in the chemical cleaning box through the pipeline to the water inlet of the purification membrane group or add it to the backwash water during backwashing to chemically clean the membrane assembly to remove stubborn pollutants. The cleaned wastewater is discharged into the sewage tank through the upper and lower outlets;

[0030] 9. During backwashing, chemical cleaning or system venting, the wastewater discharged from the upper and lower outlets of the purification membrane group enters the sewage tank through the pipeline for centralized treatment or discharge.

[0031] Compared with the prior art, the advantages of the present invention are:

[0032] This solution integrates aerobic biological treatment, physical filtration, membrane filtration, gas-water separation, circulation treatment, backwashing, aeration and chemical cleaning to achieve efficient purification of industrial wastewater, while reducing operating costs and extending equipment life. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a system diagram of the present invention;

[0034] Figure 2 is a schematic diagram of an industrial wastewater filtration system of the present invention;

[0035] Figure 3 Schematic diagram of the cleaning system of the purification membrane group of the present invention.

[0036] Description of the numbers in the figure:

[0037] 1. Aerobic tank; 2. Water inlet pump; 3. Stainless steel filter; 4. Purification membrane group; 5. Water production pump; 6. Water purification tank; 7. Gas-water separator; 8. Circulation pump; 9. Backwash pump; 10. PP filter; 11. Roots blower; 12. Sewage tank; 13. Chemical cleaning tank; 14. Cleaning pump. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] Example 1

[0040] See also Figure 1-3 , an integrated filtration system for industrial wastewater treatment, including: an aerobic tank 1, a water inlet pump 2, a stainless steel filter 3, a purification membrane group 4, a water production pump 5, a clean water tank 6, an air-water separator 7, a circulation pump 8 and a sewage tank 12.

[0041] Aerobic tank 1 is used for aerobic biological treatment of industrial wastewater to degrade organic pollutants in the wastewater;

[0042] The water inlet pump 2 is connected to the aerobic tank 1 and is used to lift and transport the wastewater treated in the aerobic tank 1;

[0043] The stainless steel filter 3 is connected to the water inlet pump 2 to perform preliminary filtration on the wastewater to remove larger particles of impurities. The stainless steel filter is a 0.5mm filter;

[0044] The water inlet of the purification membrane group 4 is connected to the stainless steel filter 3 through a pipeline. The purification membrane group 4 is used to perform deep filtration on the initially filtered wastewater to remove tiny particles, colloids, microorganisms and organic matter;

[0045] The water production pump 5 is connected to the water production port of the purification membrane group 4 to output the purified water;

[0046] The purified water tank 6 is connected to the water production pump 5 and is used to store purified water;

[0047] The gas-water separator 7 is used to separate the gas and liquid in the wastewater. The water inlet of the gas-water separator 7 is connected to the concentrated water end of the purification membrane group 4, and the gas outlet of the gas-water separator 7 is connected to the aerobic tank 1 through a pipeline.

[0048] The circulation pump 8 is connected to the liquid outlet of the gas-water separator 7. The circulation pump 8 is connected to the connecting pipeline of the water inlet pump 2 and the stainless steel filter 3 through a pipeline to circulate part of the liquid separated by the gas-water separator.

[0049] The upper and lower outlets of the purification membrane group 4 are connected to a sewage tank 12 through pipelines for collecting wastewater discharged during backwashing, chemical cleaning or system emptying.

[0050] In addition, each pipeline is equipped with sensors for monitoring system data, including pressure sensors and flow sensors.

[0051] Example 2

[0052] See also Figure 1-3 The purification membrane group 4 is also connected to a cleaning system, which is used to clean the purification membrane group 4. The cleaning system includes a backwash system, an aeration system and a chemical cleaning system.

[0053] The backwash system includes a backwash pump 9, the water inlet end of the backwash pump 9 is connected to the clean water tank 6 through a pipeline, the water outlet end of the backwash pump 9 is connected to the PP filter 10, and the water outlet end of the PP filter 10 is connected to the upper discharge port of the purification membrane group 4 through a pipeline, so as to backwash the purification membrane group 4.

[0054] The aeration system includes a Roots blower 11, which is connected to the aeration port of the purification membrane group 4 through a pipeline, and uses bubbles to flush the membrane surface to slow down the deposition of pollutants.

[0055] The chemical cleaning system includes a chemical cleaning tank 13, which is connected to the water inlet of the purification membrane module 4 via a pipeline. A cleaning pump 14 is also connected to the water inlet of the purification membrane module 4 via a pipeline. A branch pipe is connected to the pipeline connecting the cleaning pump 14 to the purification membrane module 4. This branch pipe is connected to the pipeline connecting the backwash pump 9 and the PP filter 10, thereby chemically cleaning the membrane module.

[0056] Example 3

[0057] See also Figure 1-3 , a filtration method for integrated industrial wastewater treatment, comprising the following steps:

[0058] 1. Aerobic biological treatment: Introduce industrial wastewater into the aerobic pool 1, and use aerobic microorganisms to degrade organic pollutants in the wastewater to reduce the concentration of organic matter in the wastewater;

[0059] 2. Wastewater lifting and preliminary filtration: The wastewater treated in the aerobic tank 1 is lifted and transported to the stainless steel filter 3 by the water inlet pump 2, and the larger particle impurities in the wastewater are removed by the stainless steel filter 3;

[0060] 3. Deep filtration: The wastewater after preliminary filtration is transported through pipelines to the water inlet of multiple groups of purification membrane groups 4, and the purification membrane groups 4 are used to deeply filter the wastewater to remove tiny particles, colloids, microorganisms and organic matter;

[0061] 4. Water production and storage: The purified water after filtration by the purification membrane group 4 is discharged through the water production port and transported by the water production pump 5 to the clean water tank 6 for storage, and then discharged or reused as treated water that meets the standards;

[0062] 5. Gas-water separation and circulation treatment: The concentrated water from the purification membrane group 4 is discharged through the concentrated water end and enters the gas-water separator 7 for gas-liquid separation. The separated gas is returned to the aerobic tank 1 through the pipeline, and the separated liquid is sent back to the pipeline between the water inlet pump 2 and the stainless steel filter 3 through the circulation pump 8 for circulation treatment;

[0063] 6. Backwashing: Start the backwashing system regularly, and use the backwashing pump 9 to transport the purified water in the clean water tank 6 to the PP filter 10. The filtered water enters the upper outlet of the purification membrane group 4 through the pipeline to reversely flush the purification membrane group 4 to remove pollutants attached to the membrane surface;

[0064] 7. Aeration: Start the aeration system and introduce air into the aeration port of the purification membrane group 4 through the Roots blower 11. The flushing effect of the bubbles will slow down the deposition of pollutants on the membrane surface and maintain the filtration performance of the membrane.

[0065] 8. Chemical cleaning: When the purification membrane group 4 is seriously polluted, the chemical cleaning system is started. The chemical cleaning agent in the chemical cleaning tank 13 is transported to the water inlet of the purification membrane group 4 through the cleaning pump 14 or added to the backwash water during backwashing to chemically clean the membrane assembly to remove stubborn pollutants. The cleaned wastewater is discharged into the sewage tank 12 through the upper and lower outlets.

[0066] IX. Wastewater treatment: During backwashing, chemical cleaning or system venting, the wastewater discharged from the upper and lower outlets of the purification membrane group 4 enters the sewage tank 12 through the pipeline for centralized treatment or discharge.

[0067] 10. System operation monitoring and adjustment: Use pressure sensors, flow sensors and other monitoring equipment to monitor the operating status of each link of the system in real time, and adjust the operating parameters of equipment such as the water inlet pump 2, circulation pump 8, backwash pump 9, and Roots blower 11 according to the monitoring data to ensure efficient and stable operation of the system.

[0068] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. An integrated filtration system for industrial wastewater treatment, characterized by: include: Aerobic tank (1), used for aerobic biological treatment of industrial wastewater to degrade organic pollutants in the wastewater; A water inlet pump (2) is connected to the aerobic tank (1) and is used to lift and transport the wastewater treated in the aerobic tank (1); A stainless steel filter (3) is connected to the water inlet pump (2) to perform preliminary filtration on the wastewater to remove larger particle impurities. The stainless steel filter is a 0.5 mm filter; Multiple purification membrane groups (4), the stainless steel filter (3) is connected to the water inlet of the purification membrane group (4) through a pipeline, and the purification membrane group (4) is used to perform deep filtration on the preliminarily filtered wastewater; a water production pump (5), connected to the water production port of the purification membrane group (4), for outputting purified water; A purified water tank (6), connected to the water production pump (5), for storing purified water; A gas-water separator (7) is used to separate gas and liquid in wastewater, wherein the water inlet of the gas-water separator (7) is connected to the concentrated water end of the purification membrane group (4), and the gas outlet of the gas-water separator (7) is connected to the aerobic tank (1) through a pipeline; A circulation pump (8) is connected to the liquid outlet end of the gas-water separator (7). The circulation pump (8) is connected to the connecting pipeline of the water inlet pump (2) and the stainless steel filter (3) through a pipeline to circulate part of the liquid separated by the gas-water separator; A cleaning system is used for cleaning the purification membrane group (4), and the cleaning system comprises a backwashing system, an aeration system and a chemical cleaning system.

2. The integrated filtration system for industrial wastewater treatment according to claim 1, characterized in that: The backwash system comprises a backwash pump (9), the water inlet of the backwash pump (9) is connected to the clean water tank (6) through a pipeline, the water outlet of the backwash pump (9) is connected to a PP filter (10), and the water outlet of the PP filter (10) is connected to the upper outlet of the purification membrane group (4) through a pipeline.

3. The integrated filtration system for industrial wastewater treatment according to claim 1, characterized in that: The aeration system comprises a Roots blower (11), and the Roots blower (11) is connected to the aeration port of the purification membrane group (4) through a pipeline.

4. The integrated filtration system for industrial wastewater treatment according to claim 1, characterized in that: The upper outlet and the lower outlet of the purification membrane group (4) are connected to a sewage tank (12) through pipelines.

5. The integrated filtration system for industrial wastewater treatment according to claim 2, characterized in that: The chemical cleaning system comprises a chemical cleaning medicine box (13), the chemical cleaning medicine box (13) is connected to a cleaning pump (14) via a pipeline, and the cleaning pump (14) is connected to the water inlet of the purification membrane group (4) via a pipeline.

6. The integrated filtration system for industrial wastewater treatment according to claim 5, characterized in that: A branch pipe is connected to the pipeline connecting the cleaning pump (14) and the purification membrane group (4), and the branch pipe is connected to the pipeline connecting the backwash pump (9) and the PP filter (10).

7. A filtration method for integrated industrial wastewater treatment according to any one of claims 1 to 6, characterized in that: The following steps are involved:

1. Introducing industrial wastewater into an aerobic pool (1), where aerobic microorganisms degrade organic pollutants in the wastewater to reduce the concentration of organic matter in the wastewater; 2. Using the water inlet pump (2) to lift the wastewater treated in the aerobic tank (1) and transport it to the stainless steel filter (3), and removing the larger particle impurities in the wastewater through the stainless steel filter (3); 3. The wastewater after preliminary filtration is transported to the water inlet of multiple purification membrane groups (4) through pipelines, and the purification membrane groups (4) are used to deeply filter the wastewater to remove tiny particles, colloids, microorganisms and organic matter; 4. The purified water after filtration by the purification membrane group (4) is discharged through the water outlet and transported by the water production pump (5) to the clean water tank (6) for storage and discharge or reuse as treated water that meets the standards; 5. The concentrated water from the purification membrane group (4) is discharged through the concentrated water end and enters the gas-water separator (7) for gas-liquid separation. The separated gas is returned to the aerobic tank (1) through the pipeline, and the separated liquid is sent back to the pipeline between the water inlet pump (2) and the stainless steel filter (3) through the circulation pump (8) for circulation treatment; 6. Regularly start the backwash system, and transport the purified water in the clean water tank (6) to the PP filter (10) through the backwash pump (9). The filtered water enters the upper outlet of the purification membrane group (4) through the pipeline, and reversely flushes the purification membrane group (4) to remove pollutants attached to the membrane surface; 7. Start the aeration system and introduce air into the aeration port of the purification membrane group (4) through the Roots blower (11). The flushing effect of the bubbles is used to slow down the deposition of pollutants on the membrane surface and maintain the filtration performance of the membrane.

8. When the purification membrane group (4) is seriously polluted, the chemical cleaning system is started, and the chemical cleaning agent in the chemical cleaning tank (13) is transported to the water inlet of the purification membrane group (4) through the cleaning pump (14) through the pipeline or added to the backwash water during backwashing, so as to chemically clean the membrane assembly to remove stubborn pollutants, and the wastewater after cleaning is discharged into the sewage tank (12) through the upper and lower discharge ports; 9. During backwashing, chemical cleaning or system venting, the wastewater discharged from the upper and lower outlets of the purification membrane group (4) enters the sewage tank (12) through the pipeline for centralized treatment or discharge.

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