CN113336400A - Treatment process and device for treating high-salinity wastewater based on BDD electrode electrolysis process - Google Patents

Abstract

The invention discloses a treatment process and a treatment device for treating high-salinity wastewater based on a BDD electrode electrolysis process, which comprises a concentrated brine tank, an evaporation chamber and a condensation chamber, wherein the BDD electrode electrolysis process comprises an electrolytic cell and a built-in BDD electrode plate; biochemical treatment mechanism includes biochemical pond, biochemical pond inside can be according to technology index of intaking and the requirement of going out water, divide into anaerobic reaction district, oxygen deficiency reaction district, good oxygen reaction district and MBR membrane cisterna in proper order with biochemical pond inside space, the inside fixed hydraulic stirrer that is equipped with in anaerobic reaction district, the inside aeration systems that is equipped with in good oxygen reaction district, the inside MBR membrane that is equipped with in MBR membrane cisterna, the inside fixed dive mixer that is equipped with in oxygen deficiency reaction district, oxygen deficiency reaction district and good oxygen reaction district inside all are equipped with the MBBR filler. The invention can remove the organic pollutants in the condensate through the biochemical treatment mechanism, and has the purification effect, so that the discharged liquid meets the requirements of corresponding discharge standards.

Description

Treatment process and device for treating high-salinity wastewater based on BDD electrode electrolysis process

Technical Field

The invention relates to the technical field of wastewater treatment, in particular to a treatment process and a treatment device for treating high-salinity wastewater based on a BDD electrode electrolysis process.

Background

The electrolytic treatment method of waste water is characterized by that it utilizes the electrolytic mechanism to make the harmful substances in the waste water produce oxidation and reduction reactions on anode and cathode respectively to convert them into harmless substances so as to implement waste water purification.

In the process of electrolysis, because the organic matters are degraded, a large amount of heat energy is released, so that liquid is heated, a large amount of steam is generated, the hot steam needs to be cooled by using special condensing equipment, the electrolytic reaction in the electrolytic cell cannot be influenced, but harmful substances may also exist in the cooled condensate, so that the condensate also needs to be subjected to further biochemical treatment, and the harmful substances in the condensate can be degraded through the biochemical reaction.

However, when the device is in actual use, a large amount of organic matters cannot be evaporated and remain in the evaporation concentrated solution, and part of the organic matters can volatilize in the evaporation process and enter the condensate, so that the residual organic matters which cannot be removed can be removed through the BDD electrode electrolysis device, meanwhile, hot steam generated in the process of electrolyzing waste water is directly condensed and then discharged, and organic pollutants contained in the condensate are removed completely through the biochemical system, so that the corresponding discharge standard is reached.

Therefore, it is necessary to invent a treatment process and a device for treating high-salinity wastewater based on a BDD electrode electrolysis process to solve the problems.

Disclosure of Invention

The invention aims to provide a treatment process and a treatment device for treating high-salinity wastewater based on a BDD electrode electrolysis process, which can remove organic pollutants in condensate completely through a biochemical treatment mechanism to play a role in purification, so that the discharged liquid meets the requirements of corresponding discharge standards, and the defects in the technology are overcome.

In order to achieve the above purpose, the invention provides the following technical scheme: a treatment process and a device for treating high-salinity wastewater based on a BDD electrode electrolysis process comprise a concentrated brine tank, an evaporation chamber and a condensation chamber, wherein the BDD electrode electrolysis process comprises an electrolytic cell and a built-in BDD electrode plate, and the bottom end of the condensation chamber is provided with a biochemical treatment mechanism;

the biochemical treatment mechanism comprises a biochemical tank, the interior of the biochemical tank can be sequentially divided into an anaerobic reaction region, an anoxic reaction region, an aerobic reaction region and an MBR membrane tank according to process water inlet indexes and water outlet requirements, a hydraulic stirrer is fixedly arranged in the anaerobic reaction region, an aeration system is arranged in the aerobic reaction region, an MBR membrane is arranged in the MBR membrane tank, a submersible stirrer is fixedly arranged in the anoxic reaction region, MBBR fillers are respectively arranged in the anoxic reaction region and the aerobic reaction region, a drainage pipeline is arranged in the MBR membrane tank, one end of the drainage pipeline extends out of the top end of the biochemical tank, a drainage pump is arranged at one end of the drainage pipeline, a dosing mechanism is arranged in the MBR membrane tank, and a backflow mechanism is arranged in the biochemical tank;

the aeration system comprises a perforated aeration pipe, the perforated aeration pipe is arranged in the aerobic reaction zone, a first aeration pipeline is connected onto the perforated aeration pipe, a second aeration pipeline is arranged in the MBR membrane tank, one end of each of the first aeration pipeline and the second aeration pipeline passes through the top end of the biochemical tank, an aeration fan is arranged at the input end of each of the first aeration pipeline and the second aeration pipeline, and the first aeration pipeline, the second aeration pipeline and the aeration fan are fixedly connected through a three-way joint;

the drug adding mechanism comprises a drug adding pipeline and a PAC (programmable automation controller) drug adding device, one end of the drug adding pipeline penetrates through the bottom end of the biochemical tank and extends into the MBR membrane tank, and the other end of the drug adding pipeline is fixedly connected with the output end of the PAC drug adding device;

the return mechanism is including nitrifying liquid backwash pump and sludge recirculation pump, nitrify the liquid backwash pump and establish inside good oxygen reaction district, the sludge recirculation pump is established inside the MBR membrane cisterna, nitrify the fixed liquid backflow pipeline that is equipped with of liquid backwash pump output, nitrify inside the liquid backflow pipeline output extends to the oxygen deficiency reaction district from good oxygen reaction district, the fixed sludge recirculation pipeline that is equipped with of sludge recirculation pump output, the sludge recirculation pipeline output extends to inside the anaerobic reaction district from the MBR membrane cisterna.

Preferably, a discharge pipeline is arranged between the condensation chamber and the biochemical pool, an external discharge pump is arranged on the discharge pipeline, the biochemical pool is arranged at the output end of the external discharge pump, and the condensation chamber is arranged at the input end of the external discharge pump.

Preferably, be equipped with waste water pipeline between thick brine case and the electrolysis trough, be equipped with the high salt on the waste water pipeline and supply the water pump, the electrolysis trough is established at high salt and is supplied the water pump output, thick brine case is established at high salt and supplies the water pump input, be equipped with hot steam pipeline between electrolysis trough and the evaporating chamber, be equipped with the high salt circulating pump on the hot steam pipeline, the evaporating chamber is established at high salt circulating pump input, the electrolysis trough is established at high salt circulating pump output, be equipped with vapor pipeline between evaporating chamber and the condensing chamber, be equipped with the fan on the vapor pipeline, the condensing chamber is established at the fan output, the evaporating chamber is established at the fan input.

Preferably, a condensation circulating pipe is arranged on the condensation chamber, a cooling tower is arranged on the condensation circulating pipe, the condensation chamber and the cooling tower form a circulating loop, a clear water circulating pump is arranged on the condensation circulating pipe, the cooling tower is arranged at the output end of the clear water circulating pump, and the condensation chamber is arranged at the input end of the clear water circulating pump.

Preferably, a heat exchange conveying pipeline is arranged on the evaporation chamber, a heat exchanger is arranged on the heat exchange conveying pipeline, a heat source device is connected onto the heat exchanger, a heat source in the heat exchanger is derived from the heat source device, and the heat source device adopts a mode of combining solar heat collection and electric heating.

Preferably, be equipped with waste water circulating line between thick brine case and the evaporating chamber, be equipped with the solid-liquid separation circulating pump on the waste water circulating line, the evaporating chamber is established at solid-liquid separation circulating pump input, be equipped with solid-liquid separator on the waste water circulating line, solid-liquid separator establishes at solid-liquid separation circulating pump output, be equipped with centrifuge on the waste water circulating line, be equipped with the waste water circulating pump between solid-liquid separator and the centrifuge, solid-liquid separator, waste water circulating pump and centrifuge connect gradually through waste water circulating line.

Preferably, be equipped with filtrate pond and backwash pump on the waste water circulating line, filtrate pond and backwash pump connect gradually through waste water circulating line, the strong brine tank is established at the backwash pump output.

The invention also comprises a treatment process for treating the high-salinity wastewater based on the BDD electrode electrolysis process, which comprises the following specific steps:

the method comprises the following steps: high-concentration high-salt wastewater is conveyed from a strong brine tank to the inside of an electrolytic tank by using a high-salt water feed pump and a wastewater conveying pipeline, the high-concentration high-salt wastewater is electrolyzed by using the electrolytic tank, hot steam generated in electrolysis can be conveyed to the inside of an evaporation chamber through a hot steam conveying pipeline, the heat exchange of the hot steam is completed through a heat exchanger, a heat source in the heat exchanger is from a heat source device, and the heat source device adopts a mode of combining solar heat collection and electric heating;

step two: hot steam conveyed to the inside of the evaporation chamber is extracted by a fan and conveyed into the inside of the condensation chamber, the steam is quickly condensed into clear water when encountering cold air in the inside of the condensation chamber, the steam is connected with the condensation chamber and a cooling tower through a condensation circulating pipe, the cooling tower is used for cooling fluid in the condensation circulating pipe again, a clear water circulating pump circulates the fluid in the condensation circulating pipe, and the fluid in the condensation circulating pipe is kept in a low-temperature state all the time in the condensation chamber through circulating cooling of the fluid, so that a quick and efficient condensation effect is realized, and redundant condensate is conveyed to the inside of the biochemical pool through a discharge pipeline and an external discharge pump;

step three: when the condensate enters the anoxic reaction zone, the denitrification of the nitrate is completed in the anoxic reaction zone, thereby removing nitrogen, finishing the reduction of organic matters and the nitration of ammonia nitrogen when entering the aerobic reaction zone, nitrifying liquid generated in the aerobic reaction zone is conveyed to the interior of the anoxic reaction zone through a nitrifying liquid reflux pump and a nitrifying liquid reflux pipeline, so that a foundation is created for denitrification in the anoxic reaction zone, the submersible stirrer is used for propelling and stirring sewage containing suspended matters, creating water flow, enhancing the stirring function and preventing sludge from settling, the aeration fan is used for adding enough dissolved oxygen into the water body, the perforated aeration pipe is used for spraying gas to prevent suspended matters from precipitating, and the MBBR filler is used for providing a suitable growth environment for microorganisms;

step four: mixed liquid in the aerobic reaction zone enters an MBR membrane tank for sludge-water separation, the MBR membrane has the effect of solid-liquid separation, the solid-liquid separation effect is good, pollutants can be preferentially extracted from the mixed liquid, intercepted sludge is conveyed to the interior of the anaerobic reaction zone through a sludge return pipeline and a sludge return pump and is mixed with inlet water to form mixed liquid, the mixed liquid is subjected to biochemical reaction by anaerobic bacteria in the anaerobic reaction zone, outlet water of the anaerobic reaction zone is discharged after subsequent deep treatment, and a medicament can be added into the MBR membrane tank through a PAC doser and a dosing pipeline in the process of sludge-water separation in the MBR membrane tank;

step five: the liquid that waste water evapotranspiration decomposition produced is from in the leading-in solid-liquid separator of follow evaporating chamber one side, salt granule that waste water evapotranspiration decomposition produced is from in the leading-in solid-liquid separator of evaporating chamber bottom, the salt thick liquid separator can be accomodate and save the salt thick liquid, then carry the inside salt thick liquid of solid-liquid separator to centrifuge through biochemical pond, utilize centrifuge to break up the salt thick liquid and carry inside the filtrate pond after scattering, utilize the filtrate pond to carry out depth filtration to the salt thick liquid, salt thick liquid after the depth filtration passes through the backwash pump and carries it to inside the strong brine tank, so that cyclic processing once more.

In the technical scheme, the invention provides the following technical effects and advantages:

1. the condensed fluid is conveyed to the interior of an anoxic reaction zone through a discharge pipeline, denitrification of nitrate is completed in the interior of the anoxic reaction zone, so that nitrogen is removed, when the interior of an aerobic reaction zone is completed, reduction of organic matters and nitrification of ammonia nitrogen are completed, nitrified liquid generated in the aerobic reaction zone can be conveyed to the interior of the anoxic reaction zone through a nitrified liquid reflux pump and a nitrified liquid reflux pipeline, so that a foundation is created for denitrification conditions in the interior of the anoxic reaction zone, a submersible stirrer can be used for propelling and stirring sewage containing suspended matters to create water flow, the stirring function is enhanced, sludge precipitation is prevented, an aeration fan can be used for adding enough dissolved oxygen to meet the requirement of aerobic organisms on oxygen, a perforated aeration pipe is used for spraying gas to prevent the suspended matters from precipitating, an environment suitable for growth is provided for microorganisms by MBBR fillers, mixed liquid in the interior of the aerobic reaction zone enters an MBR membrane tank, performing sludge-water separation, wherein the MBR membrane has the effect of solid-liquid separation, the intercepted sludge is conveyed to the interior of an anaerobic reaction zone through a sludge return pipeline and a sludge return pump, the mixed liquid is subjected to biochemical reaction through anaerobic bacteria in the anaerobic reaction zone, and a medicament can be added into the MBR membrane tank through a PAC (programmable automation controller) doser and a dosing pipeline in the process of performing sludge-water separation in the MBR membrane tank;

2. condensing hot steam through a condensing chamber, connecting the condensing chamber with a cooling tower through a condensing circulating pipe, wherein the cooling tower is used for cooling fluid in the condensing circulating pipe again, a clear water circulating pump is used for circularly condensing the fluid in the circulating pipe, and the condensing chamber is always kept in a low-temperature state through circularly cooling the fluid, so that a quick and efficient condensing effect is realized, liquid and salt particles generated by evaporation and decomposition of waste water are respectively led to a solid-liquid separator from one side and the bottom of the evaporating chamber, then salt slurry in the solid-liquid separator is conveyed into a centrifugal machine through a biochemical pool, the salt slurry is scattered by the centrifugal machine and then conveyed into a filtrate pool, the filtrate pool is used for carrying out deep filtration on the salt slurry, and the salt slurry after the deep filtration is conveyed into a strong brine tank through a reflux pump so as to be circularly treated again;

3. the waste water is electrolyzed through the electrolytic bath, hot steam generated in electrolysis is conveyed to the inside of the evaporation chamber through the hot steam conveying pipeline, the heat exchange of the hot steam is completed through the heat exchanger, the heat source in the heat exchanger comes from the heat source device, and the heat source device adopts a mode of combining solar heat collection and electric heating, so that the energy is saved, and the cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

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

FIG. 2 is a schematic view of a biochemical processing mechanism of the present invention;

FIG. 3 is a schematic view of the connection structure among the concentrated brine tank, the electrolytic cell, the evaporation chamber and the condensation chamber.

Description of reference numerals:

1 concentrated brine tank, 2 high-salt feed pump, 3 electrolytic tank, 4 high-salt circulating pump, 5 evaporating chamber, 6 blower, 7 condensing chamber, 8 cooling tower, 9 clear water circulating pump, 10 external discharge pump, 11 heat exchanger, 12 heat source device, 13 solid-liquid separation circulating pump, 14 solid-liquid separator, 15 centrifuge, 16 filtrate tank, 17 reflux pump, 18 biochemical tank, 19 anaerobic reaction zone, 20 anoxic reaction zone, 21 aerobic reaction zone, 22MBR membrane tank, 23 hydraulic stirrer, 24 submersible stirrer, 25 perforated aeration pipe, 26MBBR filler, 27MBR membrane, 28 aeration blower, 29PAC doser, 30 drainage pump, 31 nitration liquid reflux pump and 32 sludge reflux pump.

Detailed Description

In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.

The invention provides a treatment process and a device for treating high-salinity wastewater based on a BDD electrode electrolysis process, which are shown in figures 1 and 2, and comprise a concentrated brine tank 1, an evaporation chamber 5 and a condensation chamber 7, wherein the BDD electrode electrolysis process comprises an electrolytic cell 3 and a built-in BDD electrode plate, and the bottom end of the condensation chamber 7 is provided with a biochemical treatment mechanism;

the biochemical treatment mechanism comprises a biochemical tank 18, the interior of the biochemical tank 18 can be divided into an anaerobic reaction zone 19, an anoxic reaction zone 20, an aerobic reaction zone 21 and an MBR membrane tank 22 according to the process water inlet index and the water outlet requirement, a hydraulic stirrer 23 is fixedly arranged inside the anaerobic reaction zone 19, an aeration system is arranged inside the aerobic reaction zone 21, an MBR membrane 27 is arranged inside the MBR membrane tank 22, a submersible stirrer 24 is fixedly arranged inside the anoxic reaction zone 20, MBBR fillers 26 are arranged in the anoxic reaction zone 20 and the aerobic reaction zone 21, a drainage pipe is arranged in the MBR membrane tank 22, one end of the drainage pipe extends out from the top end of the biochemical tank 18, one end of the drainage pipeline is provided with a drainage pump 30, a dosing mechanism is arranged inside the MBR membrane tank 22, and a backflow mechanism is arranged inside the biochemical tank 18;

the aeration system comprises a perforated aeration pipe 25, the perforated aeration pipe 25 is arranged in the aerobic reaction zone 21, the perforated aeration pipe 25 is connected with a first aeration pipeline, a second aeration pipeline is arranged in the MBR membrane pool 22, one end of each of the first aeration pipeline and the second aeration pipeline passes through the top end of the biochemical pool 18, the input ends of the first aeration pipeline and the second aeration pipeline are provided with aeration fans 28, and the first aeration pipeline, the second aeration pipeline and the aeration fans 28 are fixedly connected through three-way joints;

the drug adding mechanism comprises a drug adding pipeline and a PAC (packaged aluminum chloride) drug adding device 29, one end of the drug adding pipeline penetrates through the bottom end of the biochemical tank 18 and extends into the MBR membrane tank 22, and the other end of the drug adding pipeline is fixedly connected with the output end of the PAC drug adding device 29;

the return mechanism is including nitrifying liquid backwash pump 31 and sludge recirculation pump 32, nitrify liquid backwash pump 31 and establish inside good oxygen reaction zone 21, sludge recirculation pump 32 is established inside MBR membrane cisterna 22, nitrify the fixed liquid backflow pipeline that is equipped with of liquid backwash pump 31 output, nitrify liquid backflow pipeline output and extend to oxygen deficiency reaction zone 20 inside from good oxygen reaction zone 21, sludge recirculation pump 32 output is fixed and is equipped with sludge recirculation pipeline, sludge recirculation pipeline output extends to anaerobic reaction zone 19 inside from MBR membrane cisterna 22.

A discharge pipeline is arranged between the condensing chamber 7 and the biochemical tank 18, an external discharge pump 10 is arranged on the discharge pipeline, the biochemical tank 18 is arranged at the output end of the external discharge pump 10, and the condensing chamber 7 is arranged at the input end of the external discharge pump 10.

The implementation mode is specifically as follows: the redundant condensate is conveyed to the interior of the biochemical pool through a discharge pipeline and an external discharge pump, when the condensate enters the interior of the anoxic reaction zone 20, denitrification of nitrate is completed in the interior of the anoxic reaction zone 20, so that nitrogen is removed, when the condensate enters the interior of the aerobic reaction zone 21, reduction of organic matters and nitrification of ammonia nitrogen are completed, nitrified liquid generated in the aerobic reaction zone 21 is conveyed to the interior of the anoxic reaction zone 20 through a nitrified liquid reflux pump 31 and a nitrified liquid reflux pipeline, a foundation is created for denitrification in the interior of the anoxic reaction zone 20, a submersible mixer 24 is used for propelling and stirring sewage containing suspended matters, a water flow is created, a stirring function is enhanced, sludge precipitation is prevented, an aeration fan 28 is used for increasing enough dissolved oxygen in water to meet the requirement of aerobic organisms on oxygen, and a perforated aeration pipe 25 is used for spraying gas, the suspended matters can not be precipitated, the MBBR filler 26 has the function of providing an environment suitable for growth for microorganisms, the mixed liquid in the aerobic reaction zone 21 enters the MBR membrane pool 22 for mud-water separation, the MBR membrane 27 has the function of solid-liquid separation, the solid-liquid separation effect is good, pollutants can be preferentially extracted from the mixed liquid, the intercepted sludge is conveyed to the interior of the anaerobic reaction zone 19 through a sludge backflow pipeline and a sludge backflow pump 32 and is mixed with inlet water to form mixed liquid, the mixed liquid is subjected to biochemical reaction through anaerobic bacteria in the anaerobic reaction zone 19, the outlet water of the anaerobic reaction zone 19 is discharged after subsequent advanced treatment, the chemicals can be added into the interior of the MBR membrane pool 22 through a PAC doser 29 and a dosing pipeline in the process of mud-water separation in the MBR membrane pool 22, and organic pollutants in condensate can be completely removed through a biochemical treatment mechanism, the method has the advantages that the purification effect is achieved, the discharged liquid meets the requirements of corresponding discharge standards, and the implementation mode specifically solves the problems that in the prior art, a large amount of organic matters cannot be evaporated and are remained in the evaporation concentrated solution, and part of the organic matters are volatilized in the evaporation process and enter the condensate.

The invention provides a treatment device for treating high-salinity wastewater based on a BDD electrode electrolysis process as shown in figures 1 and 3, a waste water conveying pipeline is arranged between the concentrated brine tank 1 and the electrolytic bath 3, a high-salinity feed pump 2 is arranged on the waste water conveying pipeline, the electrolytic tank 3 is arranged at the output end of the high-salinity feed pump 2, the concentrated brine tank 1 is arranged at the input end of the high-salinity feed pump 2, a hot steam conveying pipeline is arranged between the electrolytic bath 3 and the evaporation chamber 5, a high-salt circulating pump 4 is arranged on the hot steam conveying pipeline, the evaporation chamber 5 is arranged at the input end of the high salt circulating pump 4, the electrolytic bath 3 is arranged at the output end of the high salt circulating pump 4, a steam conveying pipeline is arranged between the evaporation chamber 5 and the condensation chamber 7, a fan 6 is arranged on the steam conveying pipeline, the condensation chamber 7 is arranged at the output end of the fan 6, and the evaporation chamber 5 is arranged at the input end of the fan 6.

The condensation chamber 7 is provided with a condensation circulating pipe, the condensation circulating pipe is provided with a cooling tower 8, the condensation chamber 7 and the cooling tower 8 form a circulating loop, the condensation circulating pipe is provided with a clear water circulating pump 9, the cooling tower 8 is arranged at the output end of the clear water circulating pump 9, and the condensation chamber 7 is arranged at the input end of the clear water circulating pump 9.

The evaporation chamber 5 is provided with a heat exchange conveying pipeline, the heat exchange conveying pipeline is provided with a heat exchanger 11, the heat exchanger 11 is connected with a heat source device 12, a heat source in the heat exchanger 11 is derived from the heat source device 12, and the heat source device 12 adopts a mode of combining solar heat collection and electric heating.

The implementation mode is specifically as follows: the high-concentration high-salt wastewater is conveyed from the strong brine tank 1 to the inside of the electrolytic tank 3 by using the high-salt water feeding pump 2 and the wastewater conveying pipeline, the high-concentration high-salt wastewater is electrolyzed by using a BDD electrode plate in the electrolytic tank 3, hot steam generated in the electrolysis can be conveyed to the inside of the evaporation chamber 5 through the hot steam conveying pipeline, the heat exchange of the hot steam is completed through the heat exchanger 11, a heat source in the heat exchanger 11 comes from the heat source device 12, the heat source device 12 adopts a mode of combining solar heat collection and electric heating, the hot steam conveyed to the inside of the evaporation chamber 5 can be extracted through the fan 6 and conveyed into the inside of the condensation chamber 7, the steam can be rapidly condensed into clear water when encountering cold air in the condensation chamber 7, the condensation chamber 7 and the cooling tower 8 are connected through a condensation circulating pipe, the cooling tower 8 is used for cooling the fluid in the condensation circulating pipe again, and the clear water circulating pump 9 is used for circulating the fluid in the condensation circulating and circulating the circulating the circulating pipe, the interior of the condensing chamber 7 is always kept in a low-temperature state through the circulating temperature reduction of the fluid, so that the rapid and efficient condensing effect is realized, and redundant condensate is conveyed to the interior of the biochemical pool 18 through a discharge pipeline and the external discharge pump 10.

The invention provides a treatment device for treating high-salinity wastewater based on a BDD electrode electrolysis process, which is shown in figures 1 and 3, wherein a wastewater circulating pipeline is arranged between a concentrated brine tank 1 and an evaporation chamber 5, a solid-liquid separation circulating pump 13 is arranged on the wastewater circulating pipeline, the evaporation chamber 5 is arranged at the input end of the solid-liquid separation circulating pump 13, a solid-liquid separator 14 is arranged on the wastewater circulating pipeline, the solid-liquid separator 14 is arranged at the output end of the solid-liquid separation circulating pump 13, a centrifuge 15 is arranged on the wastewater circulating pipeline, a wastewater circulating pump is arranged between the solid-liquid separator 14 and the centrifuge 15, and the solid-liquid separator 14, the wastewater circulating pump and the centrifuge 15 are sequentially connected through the wastewater circulating pipeline.

Be equipped with filtrate pond 16 and backwash pump 17 on the waste water circulating line, filtrate pond 16 and backwash pump 17 connect gradually through waste water circulating line, strong brine tank 1 establishes at backwash pump 17 output.

The implementation mode is specifically as follows: the liquid that waste water evapotranspiration decomposes the production is from in the leading-in solid-liquid separator 14 of 5 one sides from the evaporating chamber, the salt granule that waste water evapotranspiration decomposes the production is from in the leading-in solid-liquid separator 14 of 5 bottoms of evaporating chamber, salt thick liquid can be accomodate and stored in solid-liquid separator 14, then carry the inside salt thick liquid of solid-liquid separator 14 to centrifuge 15 through biochemical pond 18 inside, utilize centrifuge 15 to break up the salt thick liquid and carry inside filtrate pond 16, utilize filtrate pond 16 to carry out depth filtration to the salt thick liquid, salt thick liquid after the depth filtration passes through backwash pump 17 and carries it to inside strong brine tank 1, so that the recycling is handled again.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims (8)

1. The utility model provides a treatment process and device based on BDD electrode electrolysis technology handles high salt waste water, includes concentrated brine tank (1), evaporating chamber (5) and condensing chamber (7), its characterized in that: the BDD electrode electrolysis process comprises an electrolytic cell (3) and a built-in BDD electrode plate, and a biochemical treatment mechanism is arranged at the bottom end of the condensation chamber (7);

the biochemical treatment mechanism comprises a biochemical tank (18), the biochemical tank (18) is internally divided into an anaerobic reaction area (19), an anoxic reaction area (20), an aerobic reaction area (21) and an MBR membrane tank (22) according to the process water inlet index and the water outlet requirement in sequence, a hydraulic stirrer (23) is fixedly arranged in the anaerobic reaction area (19), an aeration system is arranged in the aerobic reaction area (21), an MBR membrane (27) is arranged in the MBR membrane tank (22), a submersible stirrer (24) is fixedly arranged in the anoxic reaction area (20), MBBR fillers (26) are arranged in the anoxic reaction area (20) and the aerobic reaction area (21), a drainage pipeline is arranged in the MBR membrane tank (22), one end of the drainage pipeline extends out of the top end of the biochemical tank (18), and a drainage pump (30) is arranged at one end of the drainage pipeline, a dosing mechanism is arranged inside the MBR membrane tank (22), and a backflow mechanism is arranged inside the biochemical tank (18);

the aeration system comprises a perforated aeration pipe (25), the perforated aeration pipe (25) is arranged in the aerobic reaction zone (21), a first aeration pipeline is connected to the perforated aeration pipe (25), a second aeration pipeline is arranged in the MBR membrane tank (22), one end of each of the first aeration pipeline and the second aeration pipeline passes through the top end of the biochemical tank (18), an aeration fan (28) is arranged at the input end of each of the first aeration pipeline and the second aeration pipeline, and the first aeration pipeline, the second aeration pipeline and the aeration fan (28) are fixedly connected through a three-way joint;

the drug adding mechanism comprises a drug adding pipeline and a PAC (PAC) doser (29), one end of the drug adding pipeline penetrates through the bottom end of the biochemical tank (18) and extends into the MBR membrane tank (22), and the other end of the drug adding pipeline is fixedly connected with the output end of the PAC doser (29);

the return mechanism is including nitrifying liquid backwash pump (31) and sludge backwash pump (32), nitrify liquid backwash pump (31) and establish inside good oxygen reaction district (21), establish inside MBR membrane cisterna (22) sludge backwash pump (32), nitrify liquid backwash pump (31) output end and be equipped with nitrify liquid backflow pipeline, nitrify liquid backflow pipeline output end and extend to oxygen deficiency reaction district (20) inside from good oxygen reaction district (21), sludge backwash pump (32) output end is fixed and is equipped with sludge backflow pipeline, sludge backflow pipeline output extends to inside anaerobic reaction district (19) from MBR membrane cisterna (22).

2. The treatment device for treating the high-salinity wastewater based on the BDD electrode electrolysis process as claimed in claim 1, wherein: a discharge pipeline is arranged between the condensation chamber (7) and the biochemical tank (18), an external discharge pump (10) is arranged on the discharge pipeline, the biochemical tank (18) is arranged at the output end of the external discharge pump (10), and the condensation chamber (7) is arranged at the input end of the external discharge pump (10).

3. The treatment device for treating the high-salinity wastewater based on the BDD electrode electrolysis process as claimed in claim 1, wherein: a waste water conveying pipeline is arranged between the concentrated brine tank (1) and the electrolytic tank (3), the wastewater conveying pipeline is provided with a high-salt water feeding pump (2), the electrolytic tank (3) is arranged at the output end of the high-salt water feeding pump (2), the concentrated brine tank (1) is arranged at the input end of the high-salinity feed pump (2), a hot steam conveying pipeline is arranged between the electrolytic cell (3) and the evaporation chamber (5), the hot steam conveying pipeline is provided with a high salt circulating pump (4), the evaporation chamber (5) is arranged at the input end of the high salt circulating pump (4), the electrolytic tank (3) is arranged at the output end of the high-salt circulating pump (4), a steam conveying pipeline is arranged between the evaporation chamber (5) and the condensation chamber (7), a fan (6) is arranged on the steam conveying pipeline, the condensation chamber (7) is arranged at the output end of the fan (6), and the evaporation chamber (5) is arranged at the input end of the fan (6).

4. The treatment device for treating the high-salinity wastewater based on the BDD electrode electrolysis process as claimed in claim 1, wherein: be equipped with the condensation circulating pipe on condensation chamber (7), be equipped with cooling tower (8) on the condensation circulating pipe, condensation chamber (7) and cooling tower (8) form circulation circuit, be equipped with clear water circulating pump (9) on the condensation circulating pipe, establish at clear water circulating pump (9) output in cooling tower (8), the input at clear water circulating pump (9) is established in condensation chamber (7).

5. The treatment device for treating the high-salinity wastewater based on the BDD electrode electrolysis process as claimed in claim 1, wherein: the evaporation chamber (5) is provided with a heat exchange conveying pipeline, the heat exchange conveying pipeline is provided with a heat exchanger (11), the heat exchanger (11) is connected with a heat source device (12), a heat source in the heat exchanger (11) is derived from the heat source device (12), and the heat source device (12) adopts a mode of combining solar heat collection and electric heating.

6. The treatment device for treating the high-salinity wastewater based on the BDD electrode electrolysis process as claimed in claim 1, wherein: be equipped with waste water circulating line between thick salt water tank (1) and evaporating chamber (5), be equipped with solid-liquid separation circulating pump (13) on the waste water circulating line, establish at solid-liquid separation circulating pump (13) input in evaporating chamber (5), be equipped with solid-liquid separator (14) on the waste water circulating line, establish at solid-liquid separation circulating pump (13) output in solid-liquid separator (14), be equipped with centrifuge (15) on the waste water circulating line, be equipped with waste water circulating pump between solid-liquid separator (14) and centrifuge (15), solid-liquid separator (14), waste water circulating pump and centrifuge (15) connect gradually through waste water circulating line.

7. The treatment device for treating the high-salinity wastewater based on the BDD electrode electrolysis process as claimed in claim 6, wherein: be equipped with filtrate pond (16) and backwash pump (17) on the waste water circulating line, filtrate pond (16) and backwash pump (17) connect gradually through waste water circulating line, strong brine tank (1) is established at backwash pump (17) output.

8. The treatment device for treating the high-salinity wastewater based on the BDD electrode electrolysis process according to any one of claims 1 to 7, is characterized in that: the BDD electrode electrolysis process based treatment process for treating the high-salinity wastewater comprises the following specific steps:

the method comprises the following steps: high-concentration high-salt wastewater is conveyed to the inside of an electrolytic cell (3) from a strong brine tank (1) by using a high-salt water feed pump (2) and a wastewater conveying pipeline, the high-concentration high-salt wastewater is electrolyzed by using the electrolytic cell (3), hot steam generated in electrolysis can be conveyed to the inside of an evaporation chamber (5) through a hot steam conveying pipeline, the heat exchange of the hot steam is completed through a heat exchanger (11), a heat source in the heat exchanger (11) comes from a heat source device (12), and the heat source device (12) adopts a mode of combining solar heat collection and electric heating;

step two: hot steam conveyed into the evaporation chamber (5) is extracted through the fan (6) and conveyed into the condensation chamber (7), the steam is quickly condensed into clear water when encountering cold air in the condensation chamber (7), the condensation chamber (7) and the cooling tower (8) are connected through a condensation circulating pipe, the cooling tower (8) is used for cooling fluid in the condensation circulating pipe again, the clear water circulating pump (9) is used for circulating the fluid in the condensation circulating pipe, the low-temperature state is always kept in the condensation chamber (7) through the circulating cooling of the fluid, so that the quick and efficient condensation effect is realized, and redundant condensate is conveyed into the biochemical pool (18) through the discharge pipeline and the discharge pump (10);

step three: when the condensate enters the anoxic reaction zone (20), the denitrification of nitrate is completed in the anoxic reaction zone (20) so as to remove nitrogen, when the condensate enters the aerobic reaction zone (21), the reduction of organic matters and the nitrification of ammonia nitrogen are completed, the nitrified liquid generated in the aerobic reaction zone (21) is conveyed to the interior of the anoxic reaction zone (20) through a nitrified liquid reflux pump (31) and a nitrified liquid reflux pipeline, a foundation is created for the denitrification condition in the anoxic reaction zone (20), the submersible mixer (24) is used for propelling and stirring the sewage containing suspended matters, a water flow is created, the stirring function is enhanced, the sludge precipitation is prevented, the aeration fan (28) is used for increasing enough dissolved oxygen in the water body so as to meet the requirement of aerobic organisms on oxygen, the perforated aeration pipe (25) is used for ejecting gas so as to prevent the suspended matters from precipitating, the MBBR packing (26) has the function of providing an environment suitable for the growth of microorganisms;

step four: mixed liquid in the aerobic reaction zone (21) enters the MBR membrane tank (22) for mud-water separation, the MBR membrane (27) has the effect of solid-liquid separation, the solid-liquid separation effect is good, pollutants can be preferentially extracted from the mixed liquid, the intercepted sludge is conveyed to the interior of the anaerobic reaction zone (19) through a sludge return pipeline and a sludge return pump (32) and is mixed with inlet water to form mixed liquid, the mixed liquid is subjected to biochemical reaction in the anaerobic reaction zone (19) through anaerobic bacteria, the outlet water of the anaerobic reaction zone (19) is discharged after subsequent deep treatment, and chemicals can be added into the interior of the MBR membrane tank (22) through a PAC chemical adding device (29) and a chemical adding pipeline in the process of mud-water separation in the MBR membrane tank (22);

step five: the liquid generated by the evaporation and decomposition of the waste water is led into the solid-liquid separator (14) from one side of the evaporation chamber (5), salt particles generated by the evaporation and decomposition of the waste water are led into the solid-liquid separator (14) from the bottom of the evaporation chamber (5), the salt slurry can be stored in the solid-liquid separator (14), then the salt slurry in the solid-liquid separator (14) is conveyed into the centrifuge (15) through the biochemical pool (18), the salt slurry is scattered by the centrifuge (15) and then conveyed into the filtrate pool (16), the filtrate pool (16) is used for carrying out deep filtration on the salt slurry, and the salt slurry after the deep filtration is conveyed into the concentrated brine tank (1) through the reflux pump (17) so as to be recycled.

Images