CN115259464A

CN115259464A - Integrated industrial wastewater treatment system and method

Info

Publication number: CN115259464A
Application number: CN202210938081.4A
Authority: CN
Inventors: 刘斌; 曹键; 赵恩涛; 郭同豹; 董艳强; 刘小见; 张勇健; 方树林
Original assignee: Jiarong Technology Beijing Co ltd
Current assignee: Jiarong Technology Beijing Co ltd
Priority date: 2022-08-05
Filing date: 2022-08-05
Publication date: 2022-11-01

Abstract

The application discloses integrated industrial wastewater treatment system and method, which are used for emergency treatment of industrial wastewater in a mode of integrating a pretreatment unit, a primary DTRO unit and a secondary MTRO unit in a container, so that the industrial wastewater is discharged after meeting the discharge standard. Specifically, the second-level MTRO unit in the container comprises a first high-pressure pump and a flow sensor, the permeate liquid obtained by primary reverse osmosis concentration can be conveyed to the second-level MTRO unit for secondary concentration treatment only in a mode of matching the first high-pressure pump with the flow sensor, redundant devices are not required to be arranged, and the second-level permeate liquid meeting the discharge standard can be obtained without adding extra reagents for adjustment. The aim of shortening the construction period is thereby achieved, and the production and maintenance costs are also relatively low.

Description

Integrated industrial wastewater treatment system and method

Technical Field

The application relates to the field of industrial wastewater treatment, in particular to an integrated industrial wastewater treatment system and method.

Background

Industrial wastewater is used as wastewater and waste liquid generated in industrial production, and contains industrial production materials, intermediate products, byproducts, pollutants generated in the production process and the like which are lost along with water. Because the industrial wastewater has various types and complex components, corresponding purification treatment measures are required to be adopted for treatment according to factors such as the components, the concentration and the like of pollutants in the wastewater, and then the wastewater can be discharged.

The selection of the industrial wastewater treatment mode mainly depends on the nature, the composition and the state of pollutants in the wastewater and the requirements on water quality, so that the pollutants are separated from the wastewater to reach the discharge standard or the recovery requirement.

With the rapid development of industry, the variety and quantity of wastewater are rapidly increased, and the pollution to the environment is becoming more and more extensive, so the demand for timely and effective treatment of industrial wastewater is becoming higher and higher. The device that can emergency treatment industrial waste water on the market structure is comparatively complicated, and the construction installation cycle is longer, and production and maintenance cost are higher relatively.

Disclosure of Invention

The present application is directed to an integrated industrial wastewater treatment system and method for solving the above-mentioned problems.

In order to achieve the above object, the present application provides the following techniques:

in a first aspect, the present application provides an integrated industrial wastewater treatment system comprising a container;

a preprocessing unit, a primary DTRO unit and a secondary MTRO unit are integrated in the container; wherein the pretreatment unit, the primary DTRO unit and the secondary MTRO unit are sequentially connected by pipes;

the pretreatment unit is used for pretreating industrial wastewater to obtain coarse filtration filtrate and conveying the coarse filtration filtrate to the primary DTRO unit;

the primary DTRO unit is used for carrying out primary reverse osmosis concentration on the coarse filtrate to obtain primary concentrated solution and primary permeate;

the second-stage MTRO unit is used for further concentrating the first-stage permeate to obtain a second-stage concentrated solution and a second-stage permeate;

the two-stage MTRO unit includes a flow sensor and a first high pressure pump;

the flow sensor is used for feeding back the flow value of the primary permeate liquid to the first high-pressure pump;

the first high-pressure pump is used for conveying the primary permeate liquid to the secondary MTRO unit and automatically matching the operation frequency and the conveying flow according to the flow value of the primary permeate liquid;

the primary DTRO unit, the flow sensor and the first high-pressure pump are sequentially connected through pipes.

Preferably, the primary DTRO unit comprises a water inlet pump, a descaling unit, a second high-pressure pump, a first shock absorber, an online circulating pump, a DTRO membrane module and a first pressure regulating valve;

the water inlet pump is used for conveying the coarse filtration filtrate;

the descaling unit is used for descaling the coarse filtrate again;

the second high-pressure pump is used for conveying the coarse filtrate after descaling to the DTRO membrane module;

the first shock absorber is used for absorbing pressure pulses generated by the second high-pressure pump;

the online circulating pump is used for refluxing part of the first-stage concentrated solution to a water inlet of the online circulating pump;

the DTRO membrane module is used for concentrating the rough filtered filtrate to obtain the primary concentrated solution and the primary permeate;

the first pressure regulating valve is used for regulating the internal pressure of the DTRO membrane module;

the water inlet pump, the descaling unit, the second high-pressure pump, the first shock absorber, the online circulating pump, the DTRO membrane assembly and the first pressure regulating valve are sequentially connected through pipes, wherein the online circulating pump is located at a water inlet of the DTRO membrane assembly, and the first pressure regulating valve is located at a primary concentrated solution outlet of the DTRO membrane assembly.

Preferably, the descaling unit comprises a scale inhibitor tank, a scale inhibitor pump and a cartridge filter;

the scale inhibitor tank is used for providing scale inhibitor for the coarse filtration filtrate;

the scale inhibitor pump is used for assisting the scale inhibitor tank to add a scale inhibitor into the coarse filtrate for descaling;

the security filter is used for pre-filtering the coarse-filtered filtrate after descaling;

one end of the security filter is connected with the water inlet pump pipe, the other end of the security filter is connected with the second high-pressure pump pipe, and the scale inhibitor tank is connected with the water outlet pipe of the water inlet pump through the scale inhibitor pump.

Preferably, the DTRO membrane module comprises:

and the at least one reverse osmosis membrane column is used for performing reverse osmosis concentration treatment on the coarse filtration filtrate to obtain a first-stage concentrated solution which flows back to the water inlet of the online circulating pump, and a first-stage permeate enters the MTRO membrane module.

Preferably, said two stage MTRO unit comprises a second shock absorber, an MTRO membrane module and a second pressure regulating valve and a first return flow regulating valve;

the second shock absorber is used for absorbing pressure pulses generated by the first high-pressure pump; the MTRO membrane assembly is used for further performing reverse osmosis on the primary permeate to obtain a secondary concentrated solution and a secondary permeate;

the second pressure valve is used for regulating the pressure inside the MTRO membrane module;

the first backflow regulating valve is used for refluxing the secondary concentrated solution to the primary DTRO unit;

the second shock absorber is arranged between the first high-pressure pump and the MTRO membrane module, the second pressure valve is arranged at a second-stage concentrated solution outlet of the MTRO membrane module, and two ends of the first backflow regulating valve are respectively connected with the second pressure valve and the water inlet pump pipe.

Preferably, said secondary MTRO unit further comprises a second return flow regulator valve;

the second backflow regulating valve is used for refluxing the secondary concentrated solution to the flow sensor;

and two ends of the second backflow regulating valve are respectively connected with the second pressure valve and the flow sensor pipe.

Preferably, the pretreatment unit comprises a raw water tank, a sand filter and a cartridge filter;

the raw water tank is used for collecting and storing industrial wastewater and regulating the pH value;

the sand filter is used for filtering impurities in the industrial wastewater after the pH value is adjusted;

the core type filter is used for filtering the industrial wastewater filtered by the sand filter again to obtain rough filtered filtrate;

the raw water tank, the sand filter and the core type filter are sequentially connected through a pipe.

Preferably, pressure gauges are arranged at the water inlet and the water outlet of the sand filter and the core filter respectively; the sand filter adopts a quartz sand filter, the filtering precision is 50 mu m, and the filtering precision of the core type filter is 10 mu m.

Preferably, the inner wall of the container is provided with a heat insulation layer, and the heat insulation layer is suitable for adjusting the temperature in the container.

In a second aspect, the present application provides a method for implementing the integrated industrial wastewater treatment system, comprising the following steps:

s1, adding industrial wastewater;

s2, pretreating the industrial wastewater to obtain coarse filtrate, and conveying the coarse filtrate to a primary DTRO unit;

s3, performing reverse osmosis concentration on the coarse filtrate through a primary DTRO unit to obtain primary concentrated solution and primary permeate, and conveying the primary permeate to a secondary MTRO unit;

and S4, performing reverse osmosis concentration on the primary permeate through a secondary MTRO unit to obtain a secondary concentrated solution and a secondary permeate.

Compared with the prior art, this application can bring following technological effect:

this application is through all integrateing preprocessing unit, one-level DTRO unit and second grade MTRO unit in the container, handles the purification to industrial waste water. The use of emergency projects can also be effectively coped while the whole device is simpler and more convenient. Specifically, set up first high-pressure pump and flow sensor in second grade MTRO unit, realize being connected of one-level DTRO unit and second grade MTRO unit from this, only need adopt first high-pressure pump and flow sensor mode of mutually supporting simultaneously can convey the concentrated permeate liquid of once only permeating reverse osmosis to the second grade MTRO unit in and carry out concentrated processing once more, need not to set up unnecessary device, also need not to add extra reagent and adjusts, just can obtain the second grade permeate liquid that accords with emission standard. The first high-pressure pump automatically matches the operation frequency and the output flow according to the flow value of the primary permeate liquid fed back by the flow sensor, and the efficiency of the system for treating industrial wastewater is effectively improved. The pretreatment unit, the primary DTRO unit and the secondary MTRO unit are integrated inside the container and are convenient to move, meanwhile, the whole system can integrally run in a full-automatic mode, water and electricity can be introduced into the system to work, the operation is simpler and more convenient, the construction period is shorter, and the production and maintenance cost is relatively lower.

Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.

FIG. 1 shows a system composition schematic of the present invention;

FIG. 2 is a schematic diagram showing the components of a primary DTRO unit of the present invention;

FIG. 3 is a schematic diagram showing the composition of a two-stage MTRO unit of the present invention;

fig. 4 shows a flow chart of an implementation of the method of the invention.

Detailed Description

Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

It will be understood, however, that the terms "central," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present application or for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present application.

Example 1

As shown in fig. 1 and 3, a first aspect of the present application provides an integrated industrial wastewater treatment system including a container 100;

the container 100 is internally integrated with a preprocessing unit 200, a primary DTRO unit 300 and a secondary MTRO unit 400; wherein, the pretreatment unit 200, the primary DTRO unit 300 and the secondary MTRO unit 400 are sequentially connected by pipes;

the pretreatment unit 200 is used for pretreating industrial wastewater to obtain coarse filtration filtrate and conveying the coarse filtration filtrate to the primary DTRO unit;

a primary DTRO unit 300 for performing a primary reverse osmosis concentration on the coarse filtrate to obtain a primary concentrated solution and a primary permeate;

a secondary MTRO unit 400 for further concentrating the primary permeate to obtain a secondary concentrate and a secondary permeate;

the two-stage MTRO unit includes a flow sensor 600 and a first high pressure pump 500;

a flow sensor 600 for feeding back a flow value of the primary permeate to the first high-pressure pump 500;

a first high pressure pump 500 for delivering the primary permeate to the secondary MTRO unit 400, and automatically matching the operation frequency and delivery flow rate according to the flow rate value of the primary permeate;

the primary DTRO unit, the flow sensor 600, and the first high-pressure pump 500 are sequentially connected by pipes.

The technology mainly comprises a pretreatment unit 200, a primary DTRO unit 300 and a secondary MTRO unit 400, wherein industrial wastewater is pretreated by the pretreatment unit 200 and then flows into the primary DTRO unit 300 and the secondary MTRO unit 400 in sequence for secondary reverse osmosis concentration to obtain secondary permeate liquid meeting the discharge standard. Wherein, be provided with first high-pressure pump 500 and flow sensor 600 in the second grade MTRO unit 400 to the flow that the two cooperate can be realized between two units is carried, need not to be equipped with other devices, and the whole more simple and convenient of system can effectual shortening system construction cycle.

The application composition of the above-described preprocessing unit 200, primary DTRO unit 300, and secondary MTRO unit 400 in a specific embodiment will be described in detail below.

As shown in fig. 2, preferably, the primary DTRO unit 300 includes a water inlet pump 310, a descaling unit 320, a second high-pressure pump 330, a first shock absorber 370, an in-line circulation pump 340, a DTRO membrane module 350, and a first pressure regulating valve 360;

a feed pump 310 for delivering coarse filtrate;

a descaling unit 320 for descaling the coarse filtrate again;

the second high-pressure pump 330 is used for conveying the coarse filtrate after descaling to the DTRO membrane module;

a first shock absorber 370 for absorbing pressure pulses generated by said second high pressure pump 330;

an online circulating pump 340 for refluxing a part of the first-stage concentrated solution to the water inlet;

a DTRO membrane module 350 for concentrating the coarse filtrate to obtain a primary concentrated solution and a primary permeate;

a first pressure regulating valve 360 for regulating the pressure inside the DTRO membrane module 350;

the water inlet pump 310, the descaling unit 320, the second high-pressure pump 330, the first damper 370, the online circulating pump 340, the DTRO membrane module 350 and the first pressure regulating valve 360 are sequentially connected by pipes, wherein the online circulating pump 340 is located at a water inlet of the DTRO membrane module 350, and the first pressure regulating valve 360 is located at a primary concentrate outlet of the DTRO membrane module 350.

Preferably, the descaling unit 320 includes an antisludging agent tank 321, an antisludging agent pump 322 and a cartridge filter 323;

a scale inhibitor tank 321 for supplying a scale inhibitor to the coarse filtrate;

the scale inhibitor pump 322 is used for assisting the scale inhibitor tank to add the scale inhibitor into the rough filtrate for descaling;

the security filter 323 is used for pre-filtering the coarse-filtered filtrate after descaling;

one end of the cartridge filter 323 is connected with the water inlet pump 310, the other end of the cartridge filter 323 is connected with the second high-pressure pump pipe 330, and the scale inhibitor tank 321 is connected with the water outlet pipe of the water inlet pump 310 through the scale inhibitor pump 322.

Preferably, DTRO membrane module 350 comprises:

and the at least one reverse osmosis membrane column is used for performing reverse osmosis concentration treatment on the coarse filtrate to obtain primary concentrated solution, the primary concentrated solution flows back to a water inlet of the online circulating pump, and the primary permeate enters the MTRO membrane module.

The coarse filtrate obtained after the industrial wastewater is pretreated by the pretreatment unit 200 is delivered to the primary DTRO unit 300, wherein the coarse filtrate is introduced into the primary DTRO unit 300 by the water inlet pump 310, and before entering the DTRO membrane module 350 for reverse osmosis concentration, a scale inhibitor is added to the coarse filtrate to remove solid impurities remaining in the coarse filtrate. Specifically, the scale inhibitor needs to be added before entering the cartridge filter 323 for filtration, and the scale inhibitor in the scale inhibitor tank 321 is added by the scale inhibitor pump 322 in the process of coarse filtration filtrate flowing to the cartridge filter 323. The coarse filtrate filtered by the cartridge filter 323 is transmitted to the inside of the DTRO membrane module 350 by the second high-pressure pump 330 for primary reverse osmosis concentration.

Here, it should be noted that the DTRO membrane module 350 includes at least one reverse osmosis membrane column, wherein the reverse osmosis membrane column is a disc-tube type reverse osmosis membrane column, and has strong contamination resistance and adaptability to industrial wastewater. It should be further noted that, an online circulating pump 340 is disposed between the second high-pressure pump 330 and the DTRO membrane module 350 at the water inlet of the DTRO membrane module 350, so that the membrane pressure of the liquid entering the DTRO membrane module 350 can be further increased on the basis of the second high-pressure pump 330, and meanwhile, a part of the concentrated solution at the primary concentrated solution outlet of the DTRO membrane module 350 can be returned to the pump port of the first online circulating pump 340 through the online circulating pump 340, so as to increase the amount of the permeated solution and reduce the concentrated solution, and improve the recovery rate of the primary DTRO unit 300. The high pressure and high flow liquid from the on-line circulation pump 340 directly enters the reverse osmosis membrane column to ensure that the membrane surface of the reverse osmosis membrane column has sufficient flow and cross flow velocity, and the remaining primary concentrated solution flows to the concentrated solution reservoir to wait for treatment. It is further noted that a first damper 370 is provided between second high-pressure pump 330 and the in-line circulation pump for absorbing pressure pulses generated during operation of second high-pressure pump 330.

It should be further noted that the number of the flow guide discs and the number of the membranes arranged inside the reverse osmosis membrane column are multiple, the flow guide discs and the membranes are arranged in a staggered mode, the distance between every two adjacent flow guide discs is 3mm, and the multiple salient points are distributed on the surfaces of the flow guide discs, so that turbulence of coarse filtration liquid is increased in the flowing process, concentration polarization of membrane surfaces is reduced, and membrane pollution is reduced. The diaphragm is concentric ring-shaped, and the circular structure greatly improves the stability of the diaphragm in the DTRO membrane assembly, and reduces the possibility of piercing, thereby improving the stability of system operation and prolonging the service life of the membrane.

As shown in FIG. 3, preferably, two-stage MTRO unit 400 includes a second shock absorber 700, an MTRO membrane assembly 420, and a second pressure regulating valve 430 and a first return flow regulating valve 440;

a second shock absorber 700 for absorbing pressure pulses generated by the first high-pressure pump 500;

the MTRO membrane module 420 is used for further performing reverse osmosis on the first-stage permeate to obtain a second-stage concentrated solution and a second-stage permeate;

a second pressure valve 430 for regulating the pressure inside the MTRO membrane module;

a first reflux adjusting valve 440 for refluxing the secondary concentrate to the primary DTRO unit;

the second shock absorber 700 is arranged between the first high-pressure pump 500 and the MTRO membrane module 420, the second pressure valve 430 is arranged at the second-stage concentrate outlet of the MTRO membrane module 420, and two ends of the first return flow regulating valve 440 are respectively connected with the second pressure valve 430 and the water inlet pump 310 through pipes.

Preferably, the two-stage MTRO unit further includes a second back flow regulator valve 410;

the second backflow regulating valve 410 is used for refluxing the secondary concentrated solution to the flow sensor 600;

both ends of the second backflow regulating valve 410 are respectively connected with the second pressure valve 430 and the flow sensor 600 through pipes.

Because the pollutants have certain permeability to the primary DTRO membrane assembly 350, most of the pollutants such as COD, BOD, ammonia nitrogen, total nitrogen and the like can be intercepted, but the single-stage primary DTRO unit 350 cannot ensure that the effluent of the industrial wastewater reaches the standard and is discharged, the water produced by the primary DTRO unit 350 directly enters the secondary MTRO unit 420, the water produced by the secondary MTRO unit 420 can reach the standard and is discharged after being normal, and the secondary concentrated solution of the secondary MTRO unit 420 can directly flow back to the water inlet of the primary DTRO unit 350 due to good water quality, so that the clear liquid yield of the system is increased. Specifically, the primary permeate after primary reverse osmosis concentration in the primary DTRO unit 350 is transferred to the secondary MTRO unit 400 under the power of the first high-pressure pump 500, and further reverse osmosis concentration is performed by the MTRO membrane module 420 to obtain a secondary permeate and a secondary concentrate. During initial concentration, the second backflow regulating valve 410 is closed, the secondary concentrated solution obtained through reverse osmosis of the MTRO membrane module 420 has water quality far better than that of raw industrial wastewater, so that the secondary concentrated solution flows back to the water inlet pump of the primary DTRO unit 350 through the first backflow regulating valve 440 and is combined with the water inlet of the primary DTRO unit 350 for continuous treatment, and secondary permeate is discharged after meeting the discharge standard, so that the recovery rate of the system is improved. When the flow sensor 600 detects that the flow of the primary permeate is smaller than the working flow of the first high-pressure pump 500, the second backflow regulating valve 410 is opened, and part of the secondary concentrate flows back to the water inlet of the secondary MTRO unit 400, that is, the secondary MTRO unit 400 realizes the self-compensation of the concentrate through the mutual cooperation of the flow sensor 600 and the first high-pressure pump 500, and the whole operation is not influenced by the water yield of the primary system. Furthermore, the flow structure inside the membrane core of the MTRO membrane module 420 has open flow channels, the distance between the flow channels is about 0.8mm to 4mm, the flow resistance can be greatly reduced, the concentration polarization is reduced, the effluent water is stable, the removal rate of COD, ammonia nitrogen and total nitrogen can reach more than 90%, all soluble salts and organic matters with molecular weight more than 100 in sewage can be effectively removed, soluble metal salts, organic pollutants, bacteria, colloidal particles and heating substances can be removed, the desalination rate is more than 99%, meanwhile, the membrane adopts an industrial anti-pollution RO membrane or a nanofiltration membrane, the grid of the MTRO membrane module 420 adopts a trapezoidal structure, first-level permeation liquid flows in the flow channels formed by the grid, the resistance is smaller, meanwhile, internal transverse reinforcing ribs can increase the turbulence in the flow channels, the concentration polarization effect of the membrane is reduced, and therefore, the pollution resistance of the MTRO membrane module 420 is greatly improved. It should be further noted that the membrane module can be directly replaced by sharing a fitting with other rolled membrane modules according to actual conditions, and the membrane module has universality.

Preferably, the pretreatment unit includes a raw water tank 210, a sand filter 220, and a cartridge filter 230;

the raw water tank 210 is used for collecting and storing industrial wastewater and adjusting pH;

a sand filter 220 for filtering impurities in the industrial wastewater after the PH adjustment;

the cartridge filter 230 is used for filtering the industrial wastewater filtered by the sand filter 220 again to obtain coarse filtrate;

the raw water tank 210, the sand filter 220 and the cartridge filter 230 are sequentially connected by pipes.

Preferably, pressure gauges are arranged at the water inlet and the water outlet of the sand filter 220 and the cartridge filter 230; the sand filter 220 is a quartz sand filter with a filtering precision of 50 μm and a core filter with a filtering precision of 10 μm.

The industrial wastewater has complex components, various insoluble salts such as calcium, magnesium, barium, silicon and the like exist, the insoluble inorganic salts are highly concentrated after entering a reverse osmosis system, and when the concentration of the insoluble inorganic salts exceeds the solubility under the condition, the scaling phenomenon is generated on the surface of the membrane. The raw water pH value is adjusted to effectively prevent the scale formation of carbonate inorganic salt, so the raw water pH value is adjusted before the raw water enters the reverse osmosis. Specifically, the industrial wastewater is treated by removing particulate matters in the wastewater through a basket filter before entering a raw water tank, and while entering the raw water tank, an acid reagent is added into the raw water tank through an acid storage tank outside the container 100 to adjust the PH value, a return pipeline 212 is arranged outside the raw water tank 210, a centrifugal pump 211 is arranged on the return pipeline 212, and a stirrer 214 inside the raw water tank 210 is driven by the centrifugal pump 211 to stir, so that the industrial wastewater and the acid reagent are fully mixed and reacted after the acid reagent is added into the acid storage tank, and the PH value of the industrial wastewater is adjusted, and meanwhile, a PH value sensor 213 is arranged on the return pipeline 212, so that the PH value of the raw water is judged, the frequency of a metering pump is automatically adjusted to adjust the acid adding amount, so that the PH value before entering the primary DTRO unit 300 reaches 6.1-6.5, and it is required to be noted that if the raw wastewater itself does not need to be adjusted in this interval.

It should be noted that the industrial wastewater after PH adjustment enters the sand filter 220 for the first filtration, wherein the filler in the sand filter 220 can be quartz sand, anthracite, granular porous ceramic, manganese sand, etc., preferably quartz sand filter, thereby achieving the purpose of removing colloidal particles and high molecular organic matters. It should be noted that pressure gauges are disposed at the water inlet and the water outlet of the sand filter 220, and whether backwashing is needed is determined according to the pressure difference between the water outlet and the water inlet. Specifically, when the pressure difference exceeds 2.5bar, a backwashing procedure needs to be carried out, and the backwashing frequency of the sand filter depends on the content of suspended matters in the inlet water, and is generally 100 to 150 hours. During back flushing, air washing is firstly carried out by an air pump, then flushing is carried out, and the filtering precision of a sand filter is 50 mu m. The sand filter can realize self-adaptive operation, and the filter material has strong self-adaptability to raw water concentration, operating conditions, pretreatment process and the like, namely, the filter bed automatically forms a top-sparse and bottom-dense state during filtering, so that the water quality of effluent can be ensured under various operating conditions, the filter material is fully dispersed during backwashing, and the cleaning effect is good.

It should be noted that, the industrial wastewater passing through the quartz sand filter enters the cartridge filter 230 for secondary filtration, the water inlet and the water outlet of the cartridge filter 230 are also provided with pressure gauges, and when the pressure difference between the water outlet and the water inlet exceeds 2.0bar, the cartridge needs to be replaced. The core filter can effectively prevent various insoluble sulfates and silicates from scaling in the membrane component due to high-power concentration, and prolong the service life of the membrane.

The pretreatment unit 200 integrates coagulation reaction, filtration and continuous cleaning, simplifies the water treatment process flow, and has small floor area, simple structure and flexible and convenient installation and operation. The energy consumption and the labor management cost of multiple links of the raw water treatment process are reduced, and the operation difficulty is reduced. And the components related to the system, such as pipelines, valves, instruments, a cleaning system, an electric control device and the like, are integrated on the rack. Meanwhile, by applying a coagulation reaction mechanism and a sedimentation mechanism, suspended matters and colloidal substances in water are effectively removed, and the effluent turbidity is further reduced in a sand filtration area. Continuous self-cleaning filtration is adopted, the filter medium is automatically circulated and continuously cleaned, and back washing is carried out without stopping the machine. The micro-flocculation device is matched, various industrial water, urban domestic sewage and industrial water with the highest SS (suspended solid) of inlet water being less than or equal to mg/L are used as reuse water, the removal rate is more than or equal to 90 percent, the filtering effect is achieved, and the content of suspended matters (SS) of raw water is reduced.

Preferably, the inner wall of the container 100 is provided with an insulation layer adapted to regulate the temperature inside the container.

The inner wall of the container 100 is provided with a heat insulation layer, the temperature inside the container 100 is adjusted by adjusting the temperature of an air conditioner, a rack is also arranged in the container, and pipelines, valves, instruments, a cleaning system, an electric control device and other parts related to the system are integrated on the rack. Therefore, the whole system is more centralized, and the aim of flexibly moving to deal with the emergency situation is fulfilled.

Example 2

As shown in fig. 4, a second aspect of the present application provides a method for implementing the integrated industrial wastewater treatment system, comprising the steps of:

s1, adding industrial wastewater;

and S4, further performing reverse osmosis concentration on the primary permeate through a secondary MTRO unit to obtain a secondary concentrated solution and a secondary permeate.

The foregoing description of the embodiments of the present application has been presented for purposes of illustration and description and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or improvements to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An integrated industrial wastewater treatment system, which is characterized by comprising a container;

a preprocessing unit, a primary DTRO unit and a secondary MTRO unit are integrated in the container; wherein the pretreatment unit, the primary DTRO unit and the secondary MTRO unit are sequentially connected through pipes;

the two-stage MTRO unit includes a flow sensor and a first high pressure pump;

2. The integrated industrial wastewater treatment system according to claim 1, wherein the primary DTRO unit comprises a water inlet pump, a descaling unit, a second high-pressure pump, a first shock absorber, an in-line circulation pump, a DTRO membrane module, and a first pressure regulating valve;

the water inlet pump is used for conveying the coarse filtration filtrate;

the descaling unit is used for descaling the coarse filtered filtrate again;

the water inlet pump, the descaling unit, the second high-pressure pump, the first shock absorber, the online circulating pump, the DTRO membrane assembly and the first pressure regulating valve are sequentially connected through a pipe, wherein the online circulating pump is located at a water inlet of the DTRO membrane assembly, and the first pressure regulating valve is located at a primary concentrated solution outlet of the DTRO membrane assembly.

3. The integrated industrial wastewater treatment system according to claim 2, wherein the descaling unit comprises an antisludging agent tank, an antisludging agent pump and a cartridge filter;

the security filter is used for pre-filtering the coarse filtered filtrate after descaling;

4. The integrated industrial wastewater treatment system according to claim 2, wherein the DTRO membrane module comprises:

and the at least one reverse osmosis membrane column is used for performing reverse osmosis concentration treatment on the coarse filtrate to obtain a primary concentrated solution, the primary concentrated solution flows back to the water inlet of the online circulating pump, and the primary permeate enters the MTRO membrane module.

5. The integrated industrial wastewater treatment system according to claim 2, wherein the two-stage MTRO unit comprises a second shock absorber, an MTRO membrane module, a second pressure regulating valve, and a first return flow regulating valve;

the second shock absorber is used for absorbing pressure pulses generated by the first high-pressure pump;

the MTRO membrane assembly is used for further performing reverse osmosis on the primary permeate to obtain a secondary concentrated solution and a secondary permeate;

the first backflow regulating valve is used for backflow of the secondary concentrated solution to the primary DTRO unit; the second shock absorber is arranged between the first high-pressure pump and the MTRO membrane assembly, the second pressure valve is arranged at a second-stage concentrated solution outlet of the MTRO membrane assembly, and two ends of the first backflow regulating valve are respectively connected with the second pressure valve and the water inlet pump pipe.

6. The integrated industrial wastewater treatment system according to claim 5, wherein the secondary MTRO unit further comprises a second return flow regulator valve;

7. The integrated industrial wastewater treatment system according to claim 1, wherein the pretreatment unit comprises a raw water tank, a sand filter and a cartridge filter;

8. The integrated industrial wastewater treatment system according to claim 7, wherein pressure gauges are provided at the water inlet and the water outlet of the sand filter and the cartridge filter;

the sand filter adopts a quartz sand filter, and the filtering precision is 50 mu m; the filter accuracy of the cartridge filter was 10 μm.

9. The integrated industrial wastewater treatment system according to claim 1, wherein the inner wall of the container is provided with an insulation layer adapted to regulate the temperature inside the container.

10. A method of implementing the integrated industrial wastewater treatment system according to any one of claims 1 to 9, comprising the steps of:

s1, adding industrial wastewater;