CN106865831A

CN106865831A - Sewage water treatment method and application

Info

Publication number: CN106865831A
Application number: CN201710259140.4A
Authority: CN
Inventors: 陈根焕; 侯爱琴; 汪雅; 陈瑞; 汪凤奇; 刘志成
Original assignee: HANGZHOU ELAIKE ELECTRONIC EQUIPMENT CO Ltd
Current assignee: HANGZHOU ELAIKE ELECTRONIC EQUIPMENT CO Ltd
Priority date: 2017-04-19
Filing date: 2017-04-19
Publication date: 2017-06-20

Abstract

The invention provides a kind of sewage water treatment method and application, with the undesirable technical problem of the sewage water treatment method wastewater treatment efficiency for solving prior art, it is related to technical field of sewage, the sewage water treatment method includes：Sewage is classified；Respective pretreatment is carried out to sorted sewage；Liquid level is carried out to pretreated sewage；Advanced treating is carried out to pretreated sewage；The sewage crossed to advanced treating carries out separation of solid and liquid, generates supernatant and solid sludges；Supernatant to generating is post-processed, and to meet Treated sewage reusing, can improve wastewater treatment efficiency, while treatment effeciency can be improved.

Description

Sewage treatment method and application

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment method and application.

Background

At present, domestic sewage or wastewater discharged from factories (or plants) accounts for a large proportion of sewage discharge. In the wastewater discharged by factories, electroplating wastewater accounts for a large proportion, and the main sources of the electroplating wastewater comprise the following aspects: a large amount of cleaning sewage is generated in the processes of oil removal, rust removal pretreatment and electroplating of a plated part; waste electroplating solution and poor plating stripping solution; rinsing the plating tank, various methods and washing the sewage on the floor of the workshop; degreasing and phosphating procedures of a paint baking process generate a small amount of phosphorus-containing sewage; dehydrating the sludge; laboratory sewage, etc. Because of more plating species, complex process and complex quality of electroplating sewage, the electroplating sewage contains harmful heavy metal ions such as chromium, zinc, copper, nickel, cadmium and the like and sundries with great toxicity such as acid, alkali, cyanide and the like, and the harm of the electroplating sewage is well known, the total amount of the electroplating sewage, such as the water amount of the industries such as papermaking, printing and dyeing, chemical engineering and the like, is small, the pollution surface is narrow, but because the distribution of electroplating plants is wide, the types of high-toxicity substances contained in the sewage are various, and some substances have carcinogenesis, teratogenesis and mutation causing great harmfulness. The untreated electroplating wastewater reaching the standard is directly discharged and flows into a river channel and a pond to permeate into the ground, so that the method not only causes harm to the environment, but also pollutes drinking water and industrial water and harms the health of human beings. And must therefore be handled carefully to avoid harm to humans.

However, the sewage treatment method in the prior art has poor sewage treatment effect, and most of plants can not reach the national wastewater discharge standard.

Disclosure of Invention

In view of the above, the present invention provides a sewage treatment method and an application thereof, so as to solve the technical problem that the sewage treatment effect of the sewage treatment method in the prior art is not ideal, improve the sewage treatment effect, and improve the treatment efficiency.

In a first aspect, an embodiment of the present invention provides a sewage treatment method, including:

carrying out on-line classification on the sewage;

respectively pretreating the classified sewage;

carrying out liquid level control on the pretreated sewage;

carrying out advanced treatment on the pretreated sewage;

carrying out solid-liquid separation on the deeply treated sewage to generate supernatant and solid sludge;

the resulting supernatant was subjected to a post-treatment.

With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the online classification of the sewage specifically includes:

the method comprises the steps of classifying sewage on line according to a production line, and directly discharging the classified sewage to sewage treatment equipment of corresponding models for simple substance tank edge treatment, wherein the sewage is divided into acid-base sewage, copper-containing sewage, nickel-containing sewage, zinc-containing sewage, cyanogen-containing sewage and chromium-containing sewage.

Because harmful ions in sewage generated on different production lines are different, the sewage of the production line is classified according to the harmful ions, the classified sewage directly flows into a water inlet of sewage treatment equipment with corresponding models (the harmful ions correspond to the equipment models), and the on-line treatment of the edge of a simple substance (single type of harmful ions, such as harmful ions of acid, alkali, copper and the like) tank is carried out.

With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the respectively preprocessing is performed on the classified sewage, specifically:

and respectively carrying out reaction environment adjustment on the classified sewage, wherein the reaction environment adjustment comprises pH adjustment, or pH adjustment and ORP potential adjustment.

With reference to the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where the performing advanced treatment on the pretreated sewage specifically includes:

adding an ion remover into the sewage to carry out ion removal treatment;

adding a flocculation auxiliary agent into the sewage to carry out flocculation treatment;

adding a flocculating agent into the sewage for precipitation treatment.

With reference to the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the performing post-processing on the generated supernatant specifically includes:

naturally overflowing the generated supernatant;

filtering the overflowed supernatant;

carrying out reaction environment adjustment on the filtered liquid to generate reclaimed water;

and recycling the reclaimed water.

With reference to the fourth possible implementation manner of the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the filtering process is performed on the overflow supernatant, specifically:

and (3) performing primary filtration by using a filter screen and/or a reverse osmosis membrane.

With reference to the fourth possible implementation manner of the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, where before the recycling the recycled water, the method further includes:

carrying out liquid level control on the reclaimed water;

and/or the presence of a gas in the gas,

sterilizing the reclaimed water;

and/or the presence of a gas in the gas,

and cooling the reclaimed water.

With reference to the first aspect, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, where the method further includes:

and (4) post-treating the solid sludge.

With reference to the first aspect, an embodiment of the present invention provides an eighth possible implementation manner of the first aspect, where the method further includes:

the dosage of the ion remover, the flocculation auxiliary agent and the flocculating agent is adjusted.

In a second aspect, the embodiments of the present invention provide an application of the sewage treatment method, which is used for treating electroplating sewage of an electroplating plant.

The technical scheme provided by the embodiment of the invention has the following beneficial effects: in the sewage treatment method provided by the embodiment of the invention, the method comprises the following steps: firstly, carrying out online classification on sewage, then respectively pretreating the classified sewage, then carrying out liquid level control on the pretreated sewage, and then carrying out advanced treatment on the pretreated sewage; then carrying out solid-liquid separation on the deeply treated sewage to generate supernatant and solid sludge; and finally, carrying out post-treatment on the generated supernatant to meet the requirement of reclaimed water recycling. Can improve sewage treatment effect, improve sewage treatment efficiency, can realize recycling simultaneously, avoid harmful ion cross contamination, have energy-concerving and environment-protective advantage, can satisfy national sewage treatment standard.

In addition, the sewage treatment method and the adopted equipment provided by the embodiment of the invention also have the following characteristics:

1) and the volume is small: the medicine storage box, the high-speed reactor, the metering pump, the transfer pump, the stirrer, the solid-liquid separation tank and the electric cabinet which are added with the medicine are all combined together, and the floor area is only 1.628m²And 1.85m higher.

2) The layout is reasonable: each component assembly is convenient to assemble and disassemble and convenient to maintain, dozens of pipelines are arranged in the whole method, all the pipelines adopt hidden structures, and the appearance is neat.

3) And plug-flow circulation: the waste water circulation of each process adopts once lifting and plug flow type advancing, thereby reducing the kinetic energy loss.

4) And (3) high-speed reaction: in the process flow, the medicament is added, the medicament is automatically added by adopting a metering pump, the reaction is thorough through a high-speed reactor, the process time is shortened by more than ten times, and the reaction treatment method is simplified.

5) And rapid precipitation: sludge is precipitated by a sludge disc dispersion buffer and an inclined plate, solid-liquid separation is achieved in the shortest time, clear water is discharged continuously, and slurry is discharged automatically.

6) And full-automatic control: the measurement and display of the process parameters of each procedure, the start and stop of various transfer pumps, the working of metering pumps for adding medicaments and the running of a stirrer are all controlled by automatic instruments such as pH and ORP, so that full-automatic control is realized.

7) And the blank in China is filled up: the composite method tank edge processor adopted by the sewage treatment method is similar to the structural design and has not been reported from domestic and foreign data inquiry at present.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

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

FIG. 1 is a flow chart of a sewage treatment method according to an embodiment of the present invention;

FIG. 2 is a flow chart of a wastewater treatment method according to a second embodiment of the present invention;

FIG. 3 is a flow chart of a wastewater treatment method according to a third embodiment of the present invention;

FIG. 4 is a flow chart of a wastewater treatment method according to a fourth embodiment of the present invention;

FIG. 5 is a flow chart of a wastewater treatment method according to a fifth embodiment of the present invention;

FIG. 6 is a perspective view of a sewage treatment apparatus according to a sixth embodiment of the present invention;

FIG. 7 is a side view of a sewage treatment apparatus according to a sixth embodiment of the present invention;

FIG. 8 is a sectional view of a sewage treatment apparatus D-D according to a sixth embodiment of the present invention.

Legend: 301-a first dosing port; 302-a second dosing port; 303-third dosing port; 1-a first reaction tank; 2-a first retention tank; 3-a second reaction tank; 4-a second residence tank; 5-a roller; 6-a base; 7-a first high-speed reactor; 8-a water inlet; 9-a second high-speed reactor; 10-an infusion pump; 11-a medicine storage box; 12-a pipeline box; 13-a metering pump; 14-a pH meter; 15-a filter; 16-a stirrer; 17-ORP meter; 18-a sloping plate; 19-a filter screen; 20-a sludge disc dispersion buffer; 21-a sewage draining outlet; 22-a transfer pump; 23-a sedimentation tank; 24-a third reaction tank; 25-a third residence tank; 26-mounting a bracket; 27-an overflow drain; 01-electric control box.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. 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.

Considering that the sewage treatment effect of the sewage treatment method in the prior art is not ideal. Based on the above, the sewage treatment method and the application provided by the embodiment of the invention solve the technical problem of unsatisfactory sewage treatment effect in the prior art, can improve the sewage treatment effect, can improve the treatment efficiency, can be recycled in a production line after treatment, avoid cross contamination of harmful ions, and save water resources.

The first embodiment is as follows:

as shown in fig. 1, an embodiment of the present invention provides a sewage treatment method, including:

s11: and carrying out online classification on the sewage.

Specifically, sewage is classified on line, and the classified sewage is directly discharged to sewage treatment equipment of corresponding models for elemental tank edge treatment, wherein the sewage is divided into acid-base sewage, copper-containing sewage, nickel-containing sewage, zinc-containing sewage, cyanogen-containing sewage and chromium-containing sewage.

S12: and respectively pretreating the classified sewage.

Specifically, sewage which is collected in a classified manner and enters the sewage pool is respectively pretreated. Taking a sewage as an example, the sewage is pumped out of the sewage tank and enters a reaction tank of a first reaction chamber of the sewage treatment device for pretreatment. It should be noted that the level control may be performed during the pretreatment process.

S13: and (4) carrying out liquid level control on the pretreated sewage.

Specifically, get into the delay groove in the first reaction chamber to the sewage of preliminary treatment to realize the abundant reaction, simultaneously, be provided with liquid level controller in the delay groove for the realization carries out liquid level control to the sewage of preliminary treatment, in order to realize sewage treatment device's the biggest output, avoids sewage to spill over simultaneously, and polluted environment (including ground) can also avoid damaging equipment (mainly including the electrically conductive trouble of the power consumption part of equipment, influence operation).

S14: carrying out advanced treatment on the pretreated sewage;

specifically, a chemical agent is added to the treated sewage, and a high-speed reaction is performed in a high-speed reactor.

S15: and carrying out solid-liquid separation on the deeply treated sewage to generate supernatant and solid sludge.

Specifically, the deeply treated sewage is subjected to solid-liquid separation in a solid-liquid separation tank to generate supernatant and solid sludge. Supernatant liquor overflows from the upper part of the solid-liquid separation tank, and solid sludge naturally settles to a sedimentation tank under the action of self gravity.

S16: the resulting supernatant was subjected to a post-treatment.

Specifically, the supernatant which overflows naturally flows into a second reaction chamber of the sewage treatment equipment for post-treatment so as to meet the requirement of reclaimed water recycling.

In the sewage treatment method provided by the embodiment of the invention, the sewage is classified firstly, then the classified sewage is pretreated respectively, then the liquid level of the pretreated sewage is controlled, and then the pretreated sewage is subjected to advanced treatment; then carrying out solid-liquid separation on the deeply treated sewage to generate supernatant and solid sludge; and finally, the generated supernatant is subjected to aftertreatment to meet the reclaimed water recycling, the sewage treatment effect can be improved, the sewage treatment efficiency can be improved, the recycling can be realized, the cross contamination of harmful ions is avoided, the energy-saving and environment-friendly advantages are realized, and the national sewage treatment standard can be met.

In addition, the sewage treatment method provided by the embodiment of the invention can treat 100 tons of water consumed by the existing production line one day, and can recycle 80 tons of treated water, thereby greatly saving resources. The treatment cost is greatly reduced, the production line of a production enterprise is favorably expanded, and the influence of the pollution discharge index is greatly reduced. The following table shows the results of comparing the wastewater treatment method of the present invention with the chemical method:

example two

As shown in fig. 2, the embodiment of the present invention provides a sewage treatment method, which is based on the first embodiment, and comprises the following steps of S12: and respectively pretreating the classified sewage, and further limiting.

Step S12 specifically includes:

s21: and respectively carrying out reaction environment adjustment on the classified sewage.

Wherein the reaction environment adjustment comprises pH adjustment, or pH adjustment and ORP potential adjustment.

Specifically, sewage is injected into a first reaction chamber from a water inlet, pH adjustment is firstly carried out in a first reaction tank in the first reaction chamber so as to meet the requirements of reaction conditions of different sewages, meanwhile, a stirrer can be adopted for stirring and accelerating the reaction, the reaction solution enters the first detention tank for full reaction after passing through the first reaction tank, then flows into a second reaction chamber from the first detention tank, and the pH value and/or the ORP potential value are adjusted again to meet the reaction pH value and the ORP potential value for carrying out the second reaction environment adjustment, then flows into the second retention chamber for sufficient oxidation/reduction to allow oxidation/reduction to proceed more completely, it should be noted that, the liquid level height is controlled by a liquid level controller in the detention tank, so that the liquid level does not exceed a set upper limit value, and the normal and continuous operation of the equipment is ensured on the premise that the maximum efficiency of the equipment is kept. For example, the pH value of the chromium-containing sewage is adjusted to 2-3 in a first reaction tank, the chromium-containing sewage enters a first retention tank after passing through the first reaction tank to be fully reacted, then flows into a second reaction chamber from the first retention tank, is added with a reducing agent to adjust the ORP potential to be about 300mV, and then flows into the second retention chamber to be fully reduced, so that the reduction is carried out more completely. The liquid level height is controlled by a liquid level controller in the detention tank, so that the liquid level does not exceed a set upper limit value, and the normal and continuous operation of the equipment is ensured on the premise that the maximum efficiency of the equipment is kept.

Further, an oil-water separation step may be included before step S21.

Through reaction environment regulation, a beneficial reaction environment is provided for the pretreated sewage, and meanwhile, the liquid level control is favorable for realizing the rapidity and the automation of the sewage treatment equipment, so that the treatment efficiency of the sewage treatment equipment is improved.

EXAMPLE III

As shown in fig. 3, the embodiment of the present invention provides a sewage treatment method, which is based on the first embodiment, and comprises the following steps of S14: the pretreated sewage is subjected to advanced treatment, and further limitation is carried out.

Step S14 specifically includes the following steps:

s31: adding an ion remover into the sewage to carry out ion removal treatment.

Specifically, a chemical adding device is used for adding a harmful ion remover to the first high-speed reactor, the harmful ion removing treatment is mainly realized by adding the harmful ion remover to the high-speed reactor, different harmful ion removers are adopted for different harmful ions, for example, for copper-containing sewage, the added chemical is a Cu metal ion remover, and for nickel-containing sewage, the added chemical is a Ni metal ion remover.

S32: adding a flocculating aid into the sewage to carry out flocculation treatment.

Specifically, a macromolecule/macromolecule flocculation auxiliary agent (such as Polyacrylamide (PAM)) is added into the second high-speed reaction chamber through a dosing device of the device to carry out flocculation treatment on the sewage.

S33: adding a flocculating agent into the sewage for precipitation treatment.

Specifically, the chemical adding device adds a polymeric flocculant (for example, polyaluminium chloride (PAC) and Polymeric Ferric Sulfate (PFS)) into the solid-liquid separation tank to perform precipitation treatment on the sewage.

Further, the method comprises the following steps:

Specifically, the dosage of the added harmful ion remover, flocculation aid, flocculating agent and other agents is roughly and finely adjusted, the dosage is finely adjusted, the dosage and the dosage speed in the pipeline are monitored in real time, and then the dosage of the added agents is finely adjusted, so that the purpose of saving the dosage is achieved.

The advanced treatment of sewage is realized through the deionization treatment (harmful ion removal), flocculation treatment and precipitation treatment of the high-speed reactor, and harmful substances are compositely degraded, precipitated and removed through further treatment.

Example four

As shown in fig. 4, an embodiment of the present invention provides a sewage treatment method, which is based on the first embodiment, and includes the following steps of S16: the resulting supernatant was subjected to a post-treatment, which was further defined.

Step S16 specifically includes the following steps:

s41: the resulting supernatant was allowed to overflow naturally.

Specifically, the infusion pump pushes the generated supernatant through pushing circulation, and the supernatant after reaction naturally overflows.

S42: and filtering the overflowing supernatant.

Specifically, the overflowed supernatant is filtered through a solid-liquid separation tank of the device and a channel of the second reaction chamber, and the filtering mainly comprises:

Specifically, the overflowing supernatant is filtered by using a filter screen, and the filter screen can be a 325-mesh stainless steel filter screen.

And/or

Utilize reverse osmosis membrane to carry out filtration treatment to the supernatant that overflows, reverse osmosis membrane can effectually get rid of impurity such as dissolved salt, colloid, bacterium, virus, bacterium endotoxin and most organic matter in aquatic. The main separation object of the reverse osmosis membrane is the ion range in the solution, chemicals are not needed, the salt in water can be effectively removed, and the system desalination rate is generally more than 98%. Therefore, reverse osmosis is the most advanced and energy-saving and environment-friendly desalination method, and has become the mainstream pre-desalination process.

The filtering of larger particle impurities and salts can be realized by using the filter screen and/or the reverse osmosis membrane for one-time filtering.

After the first filtering, step S52 may also include a second filtering.

Specifically, the supernatant after the primary filtration flows through a filler with physical adsorption and ion exchange, and the supernatant is subjected to secondary filtration; wherein, the filler is formed by compounding at least two of quartz sand, active carbon, hydroxyapatite and rectorite, and microorganisms are cultured on the surface of the filler and are used for removing organic matters and fine suspended matters in the wastewater. After organic matter, heavy metal ion, the fine suspended solid in the supernatant were adsorbed by composite filler, thereby the organic matter is destroyed adsorption balance by the microbial degradation on composite filler surface and makes the absorption continue, and the heavy metal is got into composite filler's inside with the mode of diffusion after being adsorbed to thereby carry out ion exchange with composite material and destroy adsorption balance and make physical adsorption continue.

Organic matters, fine suspended matters and heavy metal ions in the wastewater can be further removed through secondary filtration.

The water quality is further improved by the filtering process of step S42.

S43: and (4) regulating the reaction environment of the filtered liquid to generate reclaimed water.

Specifically, the filtered liquid enters the third reaction tank of the second reaction chamber for environmental adjustment, including adjustment of the pH to 7-8, preferably, pH to 7.5.

Further, after step S43, the method may further include:

and carrying out liquid level control on the reclaimed water.

Specifically, the liquid level control is performed in the second retention tank of the second reaction chamber.

And (4) disinfecting the reclaimed water.

Specifically, the reclaimed water is pumped into a disinfection tank for disinfection treatment, disinfection can be performed by adopting an ozone introducing mode, and the ozone introducing amount and the disinfection time are determined according to actual conditions. The ozone introducing amount adopted in the embodiment of the invention is 10-15mg/L, and the disinfection time is 10-20min, preferably, the ozone introducing amount is 12mg/L, and the disinfection time is 18 min.

And cooling the reclaimed water.

Specifically, the reclaimed water is cooled through a cooler.

And recycling the reclaimed water.

The generated supernatant is subjected to post-treatment to obtain reclaimed water, and the reclaimed water is further treated to meet the requirement of reclaimed water recycling and is returned to the production line for recycling, so that the energy is saved and the environment is protected.

EXAMPLE five

As shown in fig. 5, an embodiment of the present invention provides a sewage treatment method, which is based on the first embodiment, and further includes:

s51: and (4) post-treating the solid sludge.

The solid sludge naturally sinks to the bottom of the sedimentation tank through the inclined plate arranged inside the solid-liquid separation tank, the solid sludge at the bottom of the sedimentation tank is discharged at regular time, preferably, a sludge disc dispersing buffer is arranged in the solid-liquid separation tank, the solid sludge in the sedimentation tank is rapidly discharged to a sewage discharge outlet, the sewage discharge outlet enters the sludge tank, the sludge tank is connected with a sludge concentration tank, after the sludge is compressed in the sludge compression tank, dry cakes are generated through drying, and the dry cakes are delivered to qualified units for unified treatment.

Through the post-treatment of the solid sludge, the device is ensured not to be blocked, and the continuous and efficient operation of the device is facilitated.

EXAMPLE six

An embodiment of the present invention provides a sewage treatment apparatus, which uses the sewage treatment method of the above embodiment to treat sewage of an electroplating plant, as shown in fig. 6 to 8, the apparatus includes:

the device comprises a first reaction chamber, a second reaction chamber and a dosing device, wherein a high-speed reactor and a solid-liquid separation tank are sequentially arranged in the direction of the first reaction chamber pointing to the second reaction chamber.

Wherein, the dosing device is used for adding a medicament to the sewage to be treated between the first reaction chamber and the solid-liquid separation tank.

Specifically, the dosing device can add the medicament through a pipeline between the first reaction chamber and the solid-liquid separation tank, and can also directly add the medicament into the high-speed reactor and the solid-liquid separation tank, wherein the medicament comprises a heavy metal remover, a macromolecular flocculation auxiliary agent, a macromolecular flocculant, a nickel metal remover, a neutral coagulant aid and the like.

The first reaction chamber is used for pretreating sewage to be treated.

Specifically, the first reaction chamber is provided with a water inlet 8, sewage to be treated is injected into the first reaction chamber through the water inlet 8 for pretreatment, and the pretreatment can comprise oil-water separation (optional step), cyanogen breaking treatment (optional step), chromium removal treatment (optional step) and reaction environment adjustment (such as stirring, pH value adjustment and ORP potential).

The second reaction chamber is used for carrying out post-treatment on the liquid separated by the solid-liquid separation tank so as to meet the requirement of reclaimed water recycling.

Specifically, the post-treatment comprises filtration, stirring, reclaimed water retreatment (stirring, pH value adjustment) and returning to the production line for recycling.

Further, the first reaction chamber is provided with a stirring tank for accelerating the reaction and a detention tank for making the reaction more thorough, and the second reaction chamber is also provided with a stirring tank for accelerating the reaction and a detention tank for making the reaction more thorough; wherein, a stirrer 16 is arranged in the stirring tank, and a liquid level controller (not shown in the figure) is arranged in the detention tank. The liquid level controller is used for controlling the liquid level change of the first reaction chamber and the second reaction chamber so as to control the working efficiency of the equipment, prevent the treatment from not reaching the standard, and also prevent the liquid from overflowing to pollute the environment and damage the parts of the equipment.

The number of reaction vessels and retention vessels in the first reaction chamber and the second chamber may be determined as appropriate.

In this embodiment, the stirring tank of the first reaction chamber comprises at least a first reaction tank 1 and a second reaction tank 3, the retention tank comprises at least a first retention tank 2 and a second retention tank 4, the specific positional relationship is shown in fig. 8, the first reaction tank 1, the first retention tank 2, the second reaction tank 3 and the second retention tank 4 are sequentially communicated through an internal pipeline, the bottom of the first reaction tank 1 is provided with a water inlet 8, the sewage to be treated is injected into the first reaction tank 1 from the water inlet 8 at the bottom, the reaction environment is adjusted in the first reaction tank 1, such as the pH value and the ORP potential value are adjusted by a pH meter 14 and an ORP meter 17, stirring acceleration is performed by a stirrer 16, for example, hexavalent chromium can be reduced into trivalent chromium, then the trivalent chromium is injected into the first retention tank 2 through a pipeline above the first reaction tank 1, the reduction is more thorough in the first retention tank 2, and then a pipeline below the first retention tank 2 enters the second reaction tank 3, the reaction environment, such as the pH value, is regulated again in the second reaction tank 3, and after the reaction is accelerated by further stirring, the reaction solution flows into the second detention tank 4 from the upper pipeline of the second reaction tank 3, and the reaction is detented in the second detention tank 4, so that the reaction is complete, and the micro-scale of ions to be removed can be realized. The sewage to be treated is subjected to the following steps of reaction from bottom to top to bottom and then to bottom, and the sewage is output through a pipeline to be subjected to subsequent process treatment.

It should be noted that the apparatus may further include an oil-water separation tank (not shown in the figure) for performing oil-water separation, the oil-water separation tank is communicated with the first reaction chamber through a pipeline, and at this time, the water inlet 8 is disposed in the oil-water separation tank, and enters the first reaction chamber after oil-water separation.

The second reaction chamber is provided with a stirring tank and a detention tank, wherein the stirring tank at least comprises a third reaction tank 24, the detention tank at least comprises a third detention tank 25, liquid (reclaimed water) separated by the solid-liquid separation tank enters the third reaction tank 24 from the lower part, in order to further optimize the sewage treatment effect and avoid cross contamination and incomplete acid-base reaction caused by trace heavy metal ions, the reaction environment is adjusted in the third reaction tank 24, if the pH value is adjusted to 7.5 by a pH meter 14, after the stirring acceleration by a stirrer 16, the reclaimed water is injected into the third detention tank 25 by a pipeline on the upper part of the third reaction tank 24, and the reclaimed water is detained in the third detention tank 25, so that the acid-base reaction is more thorough, the reclaimed water recycling is met, and then the reclaimed water is output by a pipeline for subsequent recycling.

Preferably, the high-speed reactors at least comprise a first high-speed reactor 7 and a second high-speed reactor 9, the length direction of the first high-speed reactor 7 and the length direction of the second high-speed reactor 9 are perpendicular to the vertical direction and are arranged in the vertical direction, on one hand, the kinetic energy loss of the liquid conveying pump 10 can be reduced when the first high-speed reactor 7 and the second high-speed reactor 9 are perpendicular to the vertical direction in the length direction and are transversely arranged side by side in the vertical direction; on the other hand, the occupied volume of the device can be reduced, so that the volume of the whole device is reduced, and the device is miniaturized.

Further, the dosing device at least comprises three dosing devices which are respectively used for adding medicaments into the first high-speed reactor 7, the second high-speed reactor 9 and the solid-liquid separation tank.

Specifically, the dosing device at least comprises a first dosing device, a second dosing device and a third dosing device, and is used for adding reaction reagents into the first high-speed reactor 7, the second high-speed reactor 9 and the solid-liquid separation tank through a first dosing port 301, a second dosing port 302 and a third dosing port 303 respectively. In the first high-speed reactor 7, the added chemical agent is ionized with heavy metals in the sewage to synthesize a compound, and in the second high-speed reactor 9, another chemical agent is combined with the sewage. It should be noted that, although fig. 6 shows that the first chemical feeding port 301 is provided in the pipeline, it is needless to say that the first chemical feeding port may be provided at any position of the first high-speed reactor 7, and it is within the scope of the present invention as long as the function of feeding chemicals into the first high-speed reactor 7 can be achieved. The other dosing ports are similar to the first dosing port 301, and are not described herein.

The dosing device is also provided with a metering pump 13 for controlling the dose.

Preferably, a filter 15 is disposed below the metering pump 13, and the filter 15 is used for filtering the added medicine to remove impurities in the added medicine, so that the medicine is relatively clean and clear. The filtered medicament is added into a high-speed reactor or a solid-liquid separation tank through a medicament feeding pipeline.

Further, the equipment also comprises a medicine storage box 11, wherein the medicine storage box 11 is communicated with a first medicine adding port 301, a second medicine adding port 302 and a third medicine adding port 303 through pipelines, and a metering pump 13 for controlling the medicine amount is arranged on the communicated pipelines; it should be noted that, a solenoid valve is arranged on the pipeline for automatically adding the medicament.

Preferably, the apparatus further includes a tilt plate 18 and a mounting bracket 26.

Wherein, the swash plate 18 is cellular, can play the effect of increase area of contact on the one hand, and on the other hand makes things convenient for the solid gliding, and the installing support 26 sets up on the inner wall of solid-liquid separation groove, and the swash plate 18 sets up on installing support 26, and the top of swash plate 18 still is provided with overflow launder 27.

Further, a filter screen 19 is provided between the second reaction chamber and the solid-liquid separation tank.

The liquid after solid-liquid separation in the solid-liquid separation tank overflows from the overflow groove 27 and enters the second reaction chamber through the filter screen 19.

Specifically, the filter screen 19 is made of stainless steel, and the liquid (supernatant) subjected to solid-liquid separation in the solid-liquid separation tank overflows from the overflow drain 27, passes through the bottom of the filter screen 19, and enters the third reaction tank 24 in the second reaction chamber. An overflow channel is arranged between the overflow groove 27 and the third reaction chamber, a filtering device is arranged in the overflow channel, the filtering device can be a filtering net 19, a reverse osmosis membrane or a combination of the two, the filtering device can also be provided with a filler for physical adsorption and ion exchange, and the filler is arranged at the downstream of the filtering net 19 and/or the reverse osmosis membrane so as to realize secondary filtering of supernatant; the filter screen 19 is arranged at the overflow holes at the upper parts of the overflow groove 27 and the overflow channel and/or the lower parts of the overflow channel and the third reaction tank 24, and the height of the overflow holes is about 50 mm; that is, the filter net 19 is provided in three ways: the first mode is as follows: a filter screen 19 can be arranged above the overflow channel 27 and the overflow channel, and the second mode is that: a third mode, in which a filter 19 is provided at the overflow passage and the lower overflow hole of the third reaction tank 24, is to provide the filter 19 at both of the above-mentioned positions, is shown in FIG. 6. The filter net 19 may be replaced with a reverse osmosis membrane.

Of course, it is also possible to arrange: a filter screen 19 can be arranged above the overflow groove 27 and the overflow channel, a reverse osmosis membrane is arranged at the overflow hole at the lower part of the overflow channel and the third reaction tank 24, and fillers with physical adsorption and ion exchange are vertically arranged side by side at the downstream (rear) of the reverse osmosis membrane, so that the primary filtration and the secondary filtration treatment of the supernatant are realized.

Preferably, a sedimentation tank 23 is arranged at the bottom of the solid-liquid separation tank, and is used for carrying out solid-liquid separation on the wastewater after the chemical is added, and the sedimentation tank 23 is V-shaped and is favorable for the generated solid (sludge) to slide downwards.

Further, a sludge disk dispersing buffer 20 for dispersing sludge and making the sludge flow is provided in the solid-liquid separation tank.

Specifically, a sewage draining outlet 21 is also arranged on the outer side of the solid-liquid separation tank, and the sewage draining outlet 21 is provided with a sewage draining valve for discharging sludge at regular time; the outside connection of mud disc dispersion buffer 20 has motor drive, and mud disc dispersion buffer 20 links to each other with drain 21, and mud disc dispersion buffer 20 can produce the plug flow effect of large tracts of land to increase bottom of the pool water and flow, prevent that mud deposit from blockking up drain 21. The sludge is precipitated by the sludge disc dispersing buffer 20 and the sloping plate 18, so that solid-liquid separation is realized in the shortest time, clear water is continuously discharged, mud is automatically discharged, and the solid-liquid separation tank can realize rapid precipitation and solid-liquid separation.

It should be noted that the solid portion of the sedimentation tank 23 is led to a sludge concentration tank connected to the sludge filter press through a pipe via the drain port 21. The precipitated sludge is automatically discharged into a sludge concentration tank of a wastewater treatment station, and is subjected to pressure filtration by a sludge filter press to form a dry cake which is delivered to a qualification unit for unified treatment.

Preferably, the apparatus further comprises an infusion pump 10 and a transfer pump 22; wherein,

the infusion pump 10, also called a lift pump, is disposed between the first reaction chamber and the high-speed reactor, and is used for conveying sewage to be treated.

Specifically, the infusion pump 10 is arranged between the second detention tank 4 and the first high-speed reactor 7, and wastewater in each process flows through the infusion pump 10 to be lifted once and then flows forward in a plug-flow manner, so that kinetic energy loss is reduced.

The transfer pump 22, also called a circulation pump, is connected to the second reaction chamber for conveying the treated liquid to the outside for recycling.

Specifically, the transfer pump 22 is connected with the third detention tank 25 for the reuse is carried out to the reclaimed water that will handle, export to the production line and use, can also set up the cooler on exporting to the pipeline of production line, the cooler is connected with the output of transfer pump 22, the reclaimed water reuse is applied to former rinsing process again that is also exactly, thereby formed a closed loop circulation, accomplish really that the technological process realizes discharging a little, and is energy-concerving and environment-protective, has improved treatment effeciency and effect, has avoided the cross contamination of harmful substance such as heavy metal ion.

As a preferred embodiment of the present invention, the transfer pump 22 is a chemical process pump or a magnetic pump.

The chemical process pump is a general name of various pumps used in the chemical production process, has various types, and can be divided into vane pumps such as a centrifugal pump, an axial flow pump, a mixed flow pump, a partial flow pump, a vortex pump and the like according to the action principle of the pump; positive displacement pumps, such as reciprocating pumps (including plunger pumps, piston pumps, diaphragm pumps, etc.); rotary pumps (including screw pumps, liquid ring pump gear pumps, sliding vane pumps, roots pumps, radial plunger pumps, etc.). The chemical process pump can work under high-temperature, low-temperature, high-pressure, inflammable, explosive and toxic corrosive media, and has the advantages of excellent corrosion resistance, good tightness and excellent wear resistance.

The magnetic pump is a new product applying the working principle of the permanent magnet coupling to the centrifugal pump, and has the characteristics of reasonable design, advanced process, full sealing, no leakage, corrosion resistance and the like. The magnetic pump (magnetic driving pump) is mainly composed of pump head, magnetic driver (magnetic cylinder), motor and connecting base plate. The magnetic driver of the magnetic pump consists of an outer magnetic rotor, an inner magnetic rotor and a non-magnetic conductive isolation sleeve, when the motor drives the outer magnetic rotor to rotate, magnetic field can penetrate through an air gap and a non-magnetic substance to drive the inner magnetic rotor connected with an impeller to synchronously rotate, non-contact synchronous transmission of power is realized, and a dynamic sealing structure which is easy to leak is converted into a static sealing structure with zero leakage. The pump shaft and the inner magnetic rotor are completely sealed by the pump body and the isolation sleeve, so that the problems of leakage, overflow, dripping and leakage are thoroughly solved.

Further, the equipment also comprises a base 6, the base 6 is provided with a roller 5, the roller 5 is preferably a universal caster, and the roller 5 is provided with a brake device which can be a brake pad. It should be noted that the roller 5 can also be replaced by a fixed foot.

Wherein, the base 6 is used for supporting the whole equipment, and the roller 5 is used for facilitating the movement and the relocation of the equipment.

Preferably, the equipment further comprises a pipeline box 12, wherein the pipeline box 12 is used for containing the power line, so that the whole equipment is attractive and tidy. The whole equipment has dozens of various pipelines, all adopt hidden structure, and the outward appearance is clean and tidy. In addition, each component assembly is convenient to assemble and disassemble and convenient to maintain.

It should be noted that the harmful substances in the treated reclaimed water can reach the national emission standard. However, during the treatment process, due to the neutralization of acid and alkali, the produced salts such as sodium sulfate and sodium chloride are increased in water. The generation of salt is inevitable in the treatment process, and the direct discharge does not influence the environment. When the content reaches a certain value, the rinsing quality is influenced, and in order to prevent the accumulation of the rinsing water, after the rinsing water is worked for one day, all the rinsing water in a countercurrent rinsing tank (which is positioned on a production line and used for treating sewage entering a sewage treatment device from a sewage port through the rinsing tank) on the production line is discharged into a wastewater treatment station, and the rinsing water is discharged into a sewer network after the treatment is qualified. And the first reaction chamber and the second reaction chamber are refilled with tap water and replaced once a day or once every two days, which is determined according to the actual conditions of various plants.

Further, the device also comprises an electric cabinet 01, wherein the electric cabinet 01 comprises a main controller, and the main controller is used for controlling the operation of the sewage treatment device so as to realize full-automatic operation. The electric cabinet 01 is used as the brain of the whole equipment, and the integrated circuit design is adopted to control the normal work and operation of the whole equipment.

As shown in fig. 6, the electric cabinet 01 is integrally arranged on the device, so as to save the occupied area of the whole application and reduce the volume of the device; it should be noted that the electric control box 01 may also be separated separately, for example, the electric control box 01 may be an industrial control computer, and the device is controlled by a wired module (such as an RS485 bus, an optical fiber) or a wireless module (such as a WiFi, a 3G, or a 4G network).

Further, the electric cabinet 01 further comprises a pH meter regulator, an ORP meter regulator, an automatic dosing controller, a stirring controller and a start-stop control device of the pump.

Wherein, the pH meter regulator is connected with the pH meter 14 and is used for realizing the automatic control of pH; the ORP meter regulator is connected with the ORP meter 17 and is used for realizing the automatic control of oxidation-reduction potential; the automatic dosing controller is connected with the metering pump 13 and is used for realizing automatic control of adding the medicament; the stirring controller is connected with the stirrer 16 and is used for controlling the operation of the stirrer 16; the pump start-stop control device is connected with various pumps (such as the infusion pump 10 and the transfer pump 22) of the equipment and is used for controlling the start and stop of the pumps.

The sewage treatment equipment provided by the embodiment of the invention can be used for treating 100 tons of water consumed by the existing production line one day, and recycling 80 tons of treated water, thereby greatly saving resources. In addition, the treatment cost is greatly reduced, which is beneficial to the production enterprises to enlarge the production line and greatly reduce the influence of the pollution discharge index.

Example seven:

an embodiment of the present invention provides a sewage treatment system, which includes a plurality of types of sewage treatment apparatuses as described in embodiment six, and is configured to separately treat classified sewage.

Specifically, the added drug is briefly described first:

wherein, E01: cu, Zn, Fe, Au (harmful) metal ion remover;

e02: a macromolecular flocculating aid;

e03: a polymeric flocculant;

e04: a Ni metal remover;

e05: a neutral flocculation aid.

The following briefly introduces each sewage treatment process:

1) type A: for acid and alkaline sewage (main harmful substance: H)⁺、OH^-、M³⁺) To perform treatment

Acid-base sewage → oil-water separation → PH adjustment (9 → liquid level control → infusion pump → E01 addition → high speed reaction in the first high speed reactor → E02 addition → high speed reaction in the second high speed reactor → E03 addition → buffer of solid-liquid separation tank → solid-liquid separation → supernatant overflow → filtration → PH adjustment (7.5 → liquid level control (2 → reclaimed water) reuse.

2) And a B type machine: treating the copper-containing sewage

The cupriferous sewage → PH adjustment to 11-12 → liquid level control → infusion pump → addition of E01 → high speed reaction in the first high speed reactor → addition of E02 → high speed reaction in the second high speed reactor → addition of E03 → buffer of solid-liquid separation tank → solid-liquid separation → overflow of supernatant → filtration → adjustment of PH below 7.5 → liquid level control 2 → reclaimed water reuse.

3) And a B type machine: treating nickel-containing sewage

Nickel-containing sewage → PH adjustment to 11-12 → liquid level control → infusion pump → addition of E04 → high-speed reaction in the first high-speed reactor → addition of E02 → high-speed reaction in the second high-speed reactor → addition of E03 → buffer of solid-liquid separation tank → solid-liquid separation → overflow of supernatant → filtration → PH adjustment below 7.5 → liquid level control 2 → reclaimed water reuse.

4) And a B type machine: treating the zinc-containing sewage

The zinc-containing sewage → PH adjustment to 11-12 → liquid level control → infusion pump → addition of E01 → high-speed reaction in the first high-speed reactor → addition of E05 → high-speed reaction in the second high-speed reactor → addition of E03 → buffer of solid-liquid separation tank → solid-liquid separation → overflow of supernatant → filtration → PH adjustment below 7.5 → liquid level control 2 → reclaimed water reuse.

5) And a C-type machine: treating the sewage containing chromium

Chromium-containing sewage → PH adjustment to 2-3 → addition of a reducing agent → adjustment of the potential value of ORP (about 300mV) → liquid level control → an infusion pump → addition of E01 → reaction in the first high-speed reactor → addition of E05 → high-speed reaction in the second high-speed reactor → addition of E03 → buffering in a solid-liquid separation tank → solid-liquid separation → overflow of supernatant → filtration → pH adjustment to 7.5 or less → liquid level control 2 → reclaimed water reuse.

6) And D type machine: treating the cyanogen-containing sewage

Cyanogen-containing sewage → first-stage cyanogen breaking treatment: adjusting the pH to 10-11 and adjusting the ORP (300-: PH 7-8 and ORP regulation (600-700mV) → liquid level control 1 → infusion pump → E01 addition → reaction in the first high-speed reactor → E02 addition → high-speed reaction in the second high-speed reactor → E03 addition → buffer of solid-liquid separation tank → solid-liquid separation → supernatant overflow → filtration → PH 7.5 regulation above → liquid level control 2 → reclaimed water recycling.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer method (which may be a personal computer, a server, or a network method) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method of treating wastewater, comprising:

carrying out on-line classification on the sewage;

respectively pretreating the classified sewage;

carrying out liquid level control on the pretreated sewage;

carrying out advanced treatment on the pretreated sewage;

the resulting supernatant was subjected to a post-treatment.

2. The wastewater treatment method according to claim 1, wherein the online classification of wastewater is specifically:

3. The wastewater treatment method according to claim 1, wherein the classified wastewater is pretreated respectively, specifically:

4. The wastewater treatment method according to claim 1, wherein the pre-treated wastewater is subjected to advanced treatment, specifically:

adding an ion remover into the sewage to carry out ion removal treatment;

adding a flocculating agent into the sewage for precipitation treatment.

5. The wastewater treatment method according to claim 1, wherein the post-treatment of the generated supernatant is specifically:

naturally overflowing the generated supernatant;

filtering the overflowed supernatant;

and recycling the reclaimed water.

6. The wastewater treatment method according to claim 5, wherein the overflow supernatant is filtered, specifically:

7. The wastewater treatment method according to claim 5, further comprising, before said recycling of reclaimed water:

carrying out liquid level control on the reclaimed water;

and/or the presence of a gas in the gas,

sterilizing the reclaimed water;

and/or the presence of a gas in the gas,

and cooling the reclaimed water.

8. The wastewater treatment method according to claim 1, further comprising:

and (4) post-treating the solid sludge.

9. The wastewater treatment method according to claim 4, further comprising:

10. The method for treating wastewater according to any one of claims 1 to 9, which is used for treating wastewater from an electroplating plant.