CN216946628U - High-salt organic wastewater treatment device - Google Patents

Abstract

The utility model relates to the technical field of wastewater treatment, in particular to a high-salt organic wastewater treatment device, which comprises an A/O biochemical tank, an ultrafiltration water production tank, a membrane depth treatment device, a concentrated solution storage tank, a triple-effect evaporation device and a salt storage tank, wherein the A/O biochemical tank, the ultrafiltration water production tank and the membrane depth treatment device are sequentially communicated through water pipes; meanwhile, the advanced treatment device for the organic wastewater after biochemical treatment ensures the stable standard-reaching discharge of the effluent quality, does not cause adverse effects on the surrounding environment, and the concentrated solution after advanced treatment enters evaporation equipment for salt evaporation concentration, thereby reducing the treatment scale of evaporation facilities on the high-salinity wastewater and greatly reducing the construction cost.

Description

High-salt organic wastewater treatment device

Technical Field

The utility model relates to the technical field of wastewater treatment, in particular to a high-salinity organic wastewater treatment device.

Background

With the rapid development of the industry in China, more and more high-salt and high-organic wastewater is generated in the daily production of the petroleum, chemical, metallurgy and electric power industries, and the environmental pollution is serious because the Chemical Oxygen Demand (COD) index and the salt content of the wastewater are very high. The discharge of waste water containing high salt and organic matters brings the salinization of river soil. These wastewaters cannot be treated or reach discharge standards by conventional biochemical methods due to high salt content and high organic content. The desalination treatment of high-salt and organic matter wastewater is a problem which is difficult to solve, and at present, a plurality of methods are adopted for the treatment of the salt-containing wastewater, and generally, the methods comprise biochemical degradation, evaporation, electrolysis, ion exchange, a membrane method and the like. But the technology has various problems, so that the treatment requirement is difficult to meet, for example, the biochemical method has the problems of incomplete treatment and incapability of reaching the standard; the evaporation method has the problems that high organic pollutants are easy to generate foam to cause material flushing, treatment equipment is easy to corrode and scale, treatment cost is high and the like; the electrolysis method has the problems of unsafe operation, high energy consumption and high cost; the problem of resin regeneration by ion exchange is not solved; the problem of concentrated solution existing in the membrane method is not solved; therefore, a high-salinity organic wastewater treatment device is provided to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a high-salinity organic wastewater treatment device to solve the technical problems.

In order to achieve the purpose, the utility model provides the following technical scheme: a high-salt organic wastewater treatment device comprises an A/O biochemical tank, an ultrafiltration water production tank, a membrane advanced treatment device, a concentrated solution storage tank, a triple-effect evaporation device and a salt storage tank, wherein the A/O biochemical tank, the ultrafiltration water production tank and the membrane advanced treatment device are sequentially communicated through water pipes, the membrane advanced treatment device is communicated with the concentrated solution storage tank through a concentrated solution pipe, and the triple-effect evaporation device is communicated with the salt storage tank through a residue discharge pipe;

the A/O biochemical pool comprises a primary aerobic pool, a primary anaerobic pool, a secondary aerobic pool and an MBR pool which are sequentially communicated, a built-in MBR membrane processor is arranged inside the MBR pool, and the MBR pool is communicated with the ultrafiltration water production pool.

Preferably, the membrane advanced treatment device and the triple-effect evaporation device are both communicated with a sewage discharge pipe.

Preferably, a sludge return pipe is communicated between the MBR tank and the ultrafiltration water production tank, and a sludge pump is arranged on the sludge return pipe.

Preferably, the device also comprises a cleaning pool which is communicated with the sludge return pipe through a cleaning pipe.

Preferably, aeration pipes are arranged inside the primary anaerobic tank and the MBR tank, and the aeration pipes are connected with an external air blower;

and the primary aerobic tank and the secondary aerobic tank are internally provided with a stirrer.

Preferably, be provided with the ORP monitor in the one-level aerobic tank, be provided with the PH monitor in the one-level anaerobic tank.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model ensures that the organic wastewater can be removed by culturing the halophilic bacteria in the A/O biochemical pool, thereby ensuring the removal effect of organic pollutants in the high-salinity wastewater, and ensures that the biochemical effluent quality is clear by adopting the built-in MBR ultrafiltration membrane for filtration, and simultaneously ensures that the biological bacteria do not run off along with the effluent, thereby ensuring the treatment stability of a biochemical system; meanwhile, the advanced treatment device for the organic wastewater after biochemical treatment ensures the stable standard-reaching discharge of the effluent quality, does not cause adverse effects on the surrounding environment, and the concentrated solution after advanced treatment enters evaporation equipment for salt evaporation concentration, thereby reducing the treatment scale of evaporation facilities on the high-salinity wastewater and greatly reducing the construction cost.

Drawings

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

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the structure of the A/O biochemical pool of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. an A/O biochemical pool; 101. a primary aerobic tank; 102. a primary anaerobic tank; 103. a secondary aerobic tank; 104. an MBR tank; 105. an MBR membrane processor; 2. an ultrafiltration water-producing tank; 3. a film advanced treatment device; 4. a concentrated solution storage tank; 5. a triple effect evaporation device; 6. a salt storage pool; 7. a water pipe; 8. a concentrate tube; 9. a slag discharge pipe; 10. a sewage discharge pipe; 11. a sludge return pipe; 12. a cleaning tank; 13. an aeration pipe; 14. a blower; 15. a blender.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a high-salinity organic wastewater treatment device comprises an A/O biochemical tank 1, an ultrafiltration water production tank 2, a membrane depth treatment device 3, a concentrated solution storage tank 4, a triple-effect evaporation device 5 and a salt storage tank 6, wherein the A/O biochemical tank 1, the ultrafiltration water production tank 2 and the membrane depth treatment device 3 are sequentially communicated through a water pipe 7, the membrane depth treatment device 3 is communicated with the concentrated solution storage tank 4 through a concentrated solution pipe 8, and the triple-effect evaporation device 5 is communicated with the salt storage tank 6 through a slag discharge pipe 9;

the A/O biochemical pool 1 comprises a primary aerobic pool 101, a primary anaerobic pool 102, a secondary aerobic pool 103 and an MBR pool 104 which are communicated in sequence, a built-in MBR membrane processor 105 is arranged inside the MBR pool 104, and the MBR pool 104 is communicated with the ultrafiltration water production pool 2.

Specifically, the membrane advanced treatment device 3 and the triple-effect evaporation device 5 are both communicated with a sewage discharge pipe 10.

Specifically, a sludge return pipe 11 is communicated between the MBR tank 104 and the ultrafiltration water production tank 2, and a sludge pump is arranged on the sludge return pipe 11 to discharge and return sludge deposited in the ultrafiltration water production tank to the A/O treatment tank.

Specifically, the device further comprises a cleaning pool 12, wherein the cleaning pool 12 is communicated with the sludge return pipe 11 through a cleaning pipe to clean the inside of the sludge return pipe.

Specifically, aeration pipes 13 are arranged in the primary anaerobic tank 102 and the MBR tank 104, and the aeration pipes 13 are connected with an external air blower 14; the blower and the aeration pipe are used for supplying dissolved oxygen required by biological strains, and the organic wastewater is biodegraded under proper salt strains and sufficient oxygen;

the first-stage aerobic tank 101 and the second-stage aerobic tank 103 are both provided with a stirrer 15, and the stirrers improve the reaction rate of the aerobic tanks.

Specifically, an ORP monitor is arranged in the first-stage aerobic tank 101, a pH monitor is arranged in the first-stage anaerobic tank 102, the ORP monitor and the pH monitor respectively monitor the pH and the ORP of the water body, and when the numerical value changes, the operation parameters can be adjusted by adding acid, alkali or a carbon source.

Example (b):

when the device is used, wastewater enters the A/O biochemical tank 1, acid or alkali is added to adjust the pH value of the wastewater to be within the range of 6.5-7.5, then the wastewater sequentially enters a biochemical treatment system consisting of a primary aerobic tank 101, a primary anaerobic tank 102, a secondary aerobic tank 103 and an MBR tank 104, an online pH monitor and an ORP monitoring instrument are arranged in the biochemical treatment device and used for monitoring the pH and ORP of a water body in time, when the numerical value changes, the operating parameters can be adjusted by adding acid, alkali or carbon source, an air blower 14 and an aeration pipe 13 are used for supplying dissolved oxygen required by biological strains, and the organic wastewater is biodegraded under proper salt strains and sufficient oxygen to remove degradable substances such as COD (chemical oxygen demand) in the organic wastewater. Then the wastewater enters a built-in MBR membrane processor 105 for mud-water separation, clear water enters an advanced treatment system, and sludge flows back to the front end of the A/O treatment system to ensure that sufficient active salt-adapted sludge strains exist in the biochemical tank. Then the wastewater enters an advanced treatment system, the advanced treatment system consists of an ultrafiltration water production tank 2 and a membrane advanced treatment device 3, and clear water obtained by filtering high-salt organic wastewater by NF and RO can be discharged up to the standard.

The concentrated solution enters the concentrated solution storage tank 4 through the concentrated solution pipe 8 and enters a triple-effect evaporation device for brine separation, the water after evaporation is discharged along with the clean water after membrane treatment, and the salt crystallized by evaporation is stored and then is disposed according to the local environmental protection requirement.

The experiment obtains the following effects:

1. the organic wastewater can be removed by culturing the halophilic bacteria in the A/O biochemical pool, so that the removal effect of organic pollutants in the high-salinity wastewater is ensured;

2. in the A/O biochemical treatment process, nutrients and alkalinity can be continuously added according to the treatment condition, and the pH value of the wastewater is adjusted to 6.5-7.3, so that the biochemical treatment effect is ensured;

3. the built-in MBR ultrafiltration membrane is adopted for filtering, so that the biochemical effluent quality is clear, the biological strains are prevented from being lost along with the effluent, and the treatment stability of a biochemical system is ensured;

4. the organic wastewater after biochemical treatment enters a nanofiltration and reverse osmosis system consisting of an ultrafiltration water producing tank and a membrane advanced treatment device, and the advanced treatment system ensures the stable standard-reaching discharge of the effluent quality and does not cause adverse effect on the surrounding environment;

5. the concentrated solution after advanced treatment enters evaporation equipment for salt evaporation and concentration, so that the treatment scale of evaporation facilities on the high-salt wastewater is reduced, and the construction cost is greatly reduced.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the claims and their equivalents.

Claims (6)

1. The utility model provides a high salt organic waste water treatment facilities which characterized in that: the system comprises an A/O biochemical pool (1), an ultrafiltration water production pool (2), a membrane advanced treatment device (3), a concentrated solution storage pool (4), a triple-effect evaporation device (5) and a salt storage pool (6), wherein the A/O biochemical pool (1), the ultrafiltration water production pool (2) and the membrane advanced treatment device (3) are sequentially communicated through a water pipe (7), the membrane advanced treatment device (3) is communicated with the concentrated solution storage pool (4) through a concentrated solution pipe (8), and the triple-effect evaporation device (5) is communicated with the salt storage pool (6) through a slag discharge pipe (9);

the A/O biochemical pool (1) comprises a primary aerobic pool (101), a primary anaerobic pool (102), a secondary aerobic pool (103) and an MBR pool (104) which are sequentially communicated, a built-in MBR membrane processor (105) is arranged inside the MBR pool (104), and the MBR pool (104) is communicated with the ultrafiltration water production pool (2).

2. The high-salinity organic wastewater treatment device according to claim 1, characterized in that: the membrane advanced treatment device (3) and the triple-effect evaporation device (5) are both communicated with a sewage discharge pipe (10).

3. The high-salinity organic wastewater treatment device according to claim 1, characterized in that: and a sludge return pipe (11) is also communicated between the MBR tank (104) and the ultrafiltration water production tank (2), and a sludge pump is arranged on the sludge return pipe (11).

4. The apparatus for treating high-salinity organic wastewater according to claim 3, characterized in that: the device also comprises a cleaning pool (12), wherein the cleaning pool (12) is communicated with the sludge return pipe (11) through a cleaning pipe.

5. The apparatus for treating high salinity organic wastewater according to claim 1, characterized in that: aeration pipes (13) are arranged in the primary anaerobic tank (102) and the MBR tank (104), and the aeration pipes (13) are connected with an external air blower (14);

the primary aerobic tank (101) and the secondary aerobic tank (103) are both provided with a stirrer (15).

6. The high-salinity organic wastewater treatment device according to claim 1, characterized in that: an ORP monitor is arranged in the first-stage aerobic tank (101), and a PH monitor is arranged in the first-stage anaerobic tank (102).

Images