CN112723638A - High-salinity wastewater zero-discharge treatment method - Google Patents
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- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/445—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by forward osmosis
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Abstract
The invention discloses a method for zero discharge treatment of high-salinity wastewater, which utilizes a magnetoelectric desalter, namely, a raw water adjusting tank, a tourmaline ceramsite filter tank and a high-efficiency electromagnetic reactor are technically combined, so as to treat the high-salinity wastewater and realize the zero discharge of the wastewater, wherein the magnetoelectric desalter comprises the following components: a raw water regulating tank, a tourmaline ceramsite filter tank, a forward osmosis reactor and a cold source evaporator. The process method is carried out under the conditions of normal temperature and normal pressure, does not need to add chemical agents, only consumes a small amount of electric energy, has no secondary pollution, and greatly reduces the treatment cost; the process method operates at normal temperature and normal pressure, the main equipment is made of conventional materials such as PE and the like, and anticorrosive materials such as nickel-based alloy or titanium alloy and the like are not needed, so that the investment cost is greatly reduced, and the process method has obvious economic benefit; the time for treating the wastewater is short, the efficiency is high, the investment of treatment equipment is less, and the occupied area is small; the process method can realize zero discharge treatment of the high-salinity wastewater, realize no discharge of pollutants to the environment, protect the ecological environment and solve the key problem for the treatment of the high-salinity wastewater.
Description
Technical Field
The invention relates to a wastewater treatment technology, in particular to a high-salinity wastewater zero-discharge treatment method.
Background
In the social and economic development and urbanization process of China, water resource shortage is becoming one of the main factors restricting the sustainable development strategy of China. In recent years, with the continuous increase of industrial scale in China, the industrial water consumption is increased dramatically. Meanwhile, the amount of generated wastewater is rapidly increased, and great challenges are brought to the current wastewater treatment and recycling technology. If the industrial wastewater is directly discharged, the environmental pollution of the surrounding soil and water body can be serious. After the wastewater is qualified after treatment, if the wastewater is not recycled, water resource waste is caused, and water resource shortage is aggravated. For high-salinity wastewater, due to the lack of technical, economic feasibility and reliability, dilution discharge methods are mostly adopted. The method can not only reduce the total amount of pollutant emission really, but also cause fresh water waste, especially the discharge of salt-containing waste water, and the mineralization of fresh water resources and the alkalization of soil are caused.
Tourmaline is a cyclic silicate mineral and has a permanent spontaneous polarization effect, which is reflected in pyroelectricity and piezoelectricity. The organic pollutant is treated by the electrolysis of tourmaline on water and the adsorption and neutralization of electrostatic field on charged ions, which is a new way for mineral resource utilization. The tourmaline has no secondary pollution, can be repeatedly used, the electric polarity of tourmaline particles influences the oxidation-reduction potential of the aqueous solution, and under the action of electric field, water molecules are electrolyzed to form active molecules H3O+Can absorb impurities and dirt in water and purify water quality. Tourmaline can be used for treating Cu-containing2+The wastewater can also adsorb Cu in the wastewater2+、Pb2+、 Zn2+And (5) carrying out purification treatment. Because metal ions and acid in the solution can be crystallized on the surface of the tourmaline through the adsorption and concentration effects, the industrial wastewater purification effect is achieved.
The forward osmosis technology is characterized in that liquid with high electrochemical potential to be treated is used as raw material liquid, a solution with relatively high osmotic pressure and low electrochemical potential is selected as drawing liquid, water molecules penetrate through the forward osmosis membrane to enter the drawing liquid from the raw material liquid side under the driving of forward osmotic pressure difference, the diluted drawing liquid can be recovered in a specific mode and then recycled, and meanwhile, product water is prepared. Compared with reverse osmosis, the forward osmosis technology has the advantages of unique property, low energy consumption, realization of the water separation process without external pressure; the membrane material is hydrophilic, so that membrane pollution can be effectively prevented; the recovery rate of water is high; the drawing liquid can be recycled, the discharge of concentrated water is less, the pollution is less, the drawing liquid is an environment-friendly technology with great potential, and the application range of the drawing liquid comprises the fields of seawater desalination, sewage purification, food, medicine, energy and the like.
Disclosure of Invention
The invention aims to provide a method for realizing zero discharge treatment and recycling of high-salinity wastewater by using a magnetoelectric desalination technology, namely a tourmaline ceramsite filter tank, a forward osmosis reactor and a cold source evaporator.
The main processing equipment related by the invention is as follows:
a raw water regulating tank, a tourmaline ceramsite filter tank, a forward osmosis reactor and a cold source evaporator.
The invention comprises the following steps:
1) the high-salinity wastewater is subjected to turbidity removal, the pH value is adjusted to be 4-5, and then the high-salinity wastewater enters a raw water adjusting tank to stabilize the water quantity and the water quality;
2) treating the effluent of the raw water regulating tank through a tourmaline ceramsite filter, and refluxing backwashing water of the tourmaline ceramsite filter to the raw water regulating tank;
3) the water discharged from the tourmaline ceramsite filter tank enters a forward osmosis reactor;
4) allowing the absorption liquid of the forward osmosis reactor to absorb pure water in the wastewater and then allowing the absorption liquid to enter a cold source evaporator unit for separation of the absorption liquid and the pure water;
5) the pure water outlet of the cold source evaporator unit is recycled;
6) condensing and refluxing the vapor of the drawing liquid of the cold source evaporator unit to the forward osmosis reactor;
7) the solid crystal residue in the cold source evaporator is periodically scraped.
The tank body of the raw water adjusting tank is preferably made of PE anticorrosive materials, and a pH adjusting agent adding device is preset at a water inlet of the tank body and is used for adjusting the water quantity and the pH value of water.
The tourmaline ceramsite filter tank adopts a conventional sand filter tank filtering back-flushing working mode (the model is LDX-15, the manufacturer is Xiamenineo new group), and the filter material of the tourmaline ceramsite filter tank adopts nano tourmaline ceramsite (the model is synbiotic nano energy ball, the manufacturer is Xiamenineo new group).
The forward osmosis membrane of the forward osmosis reactor is preferably a roll-type forward osmosis membrane module (inlet diameter: 4 inches, working pressure: 25psi, output: 200L/H, model number FO4040, CSM, manufactured by Korea Korean Membrane industries, Ltd.). The draw solution of the forward osmosis reactor is preferably 3.14mol/L saturated solution of ammonium bicarbonate.
The cold source evaporator unit is preferably a combined system of an electromagnetic reactor and a normal-temperature normal-pressure high-efficiency evaporation unit (water yield 1t/d, model NAVDY-CSE-3, brand Nuodi, McDonald film science and technology Co., Ltd.).
Compared with the traditional treatment method adopting the process of adding chemical agents, the method has the following remarkable advantages and effects:
1. the process method is carried out under the conditions of normal temperature and normal pressure, does not need to add chemical agents, only consumes a small amount of electric energy, has no secondary pollution, and greatly reduces the treatment cost.
2. The process method operates at normal temperature and normal pressure, the main equipment is made of conventional materials such as PE and the like, and anticorrosive materials such as nickel-based alloy or titanium alloy and the like are not needed, so that the investment cost is greatly reduced, and the process method has obvious economic benefit.
3. Short time for treating wastewater, high efficiency, less investment of treatment equipment and small occupied area.
4. The process method can realize zero discharge treatment of the high-salinity wastewater, realize no discharge of pollutants to the environment, protect the ecological environment and solve the key problem for the treatment of the high-salinity wastewater.
Drawings
FIG. 1 is a schematic flow chart of a processing procedure according to an embodiment of the present invention.
Detailed Description
The invention is further illustrated by the following examples:
the main processing equipment related by the invention is as follows:
a raw water regulating tank, a tourmaline ceramsite filter tank and a forward osmosis reactor. The above-mentioned treatment equipment can be purchased according to the relevant requirements, wherein:
the tank body of the raw water adjusting tank is preferably made of PE anticorrosive materials, and a pH adjusting agent adding device is preset at a water inlet of the tank body and is used for adjusting the water quantity and the pH value of water.
The tourmaline ceramsite filter tank adopts a conventional sand filter tank filtering back-flushing working mode (the model is LDX-15, the manufacturer is Xiamenineo new group), and the filter material of the tourmaline ceramsite filter tank adopts nano tourmaline ceramsite (the model is synbiotic nano energy ball, the manufacturer is Xiamenineo new group).
The forward osmosis membrane of the forward osmosis reactor is preferably a roll-type forward osmosis membrane module (inlet diameter: 4 inches, working pressure: 25psi, output: 200L/H, model number FO4040, CSM, manufactured by Korea Korean Membrane industries, Ltd.). The draw solution of the forward osmosis reactor is preferably 3.14mol/L saturated solution of ammonium bicarbonate.
The cold source evaporator unit is preferably a combined system of an electromagnetic reactor and a normal-temperature normal-pressure high-efficiency evaporation unit (water yield 1t/d, model NAVDY-CSE-3, brand Nuodi, McDonald film science and technology Co., Ltd.).
The present invention comprises the following steps (see fig. 1):
1) the high-salinity wastewater is subjected to turbidity removal, the pH value is adjusted to be 4-5, and then the high-salinity wastewater enters a raw water adjusting tank to stabilize the water quantity and the water quality;
2) treating the effluent of the raw water regulating tank through a tourmaline ceramsite filter, and refluxing backwashing water of the tourmaline ceramsite filter to the raw water regulating tank;
3) the water discharged from the tourmaline ceramsite filter tank enters a forward osmosis reactor;
4) allowing the absorption liquid of the forward osmosis reactor to absorb pure water in the wastewater and then allowing the absorption liquid to enter a cold source evaporator unit for separation of the absorption liquid and the pure water;
5) the pure water outlet of the cold source evaporator unit is recycled;
6) condensing and refluxing the vapor of the drawing liquid of the cold source evaporator unit to the forward osmosis reactor;
7) the solid crystal residue in the cold source evaporator is periodically scraped.
Example 1
The magnetoelectric desalter is utilized to carry out the treatment of the desulfurization high-salinity wastewater of the power plant and the water qualityThe following were used: pH value of 5.8 and CODCr4250mg/L of chloride, 38500mg/L of BOD580.0mg/L, TDS 85000mg/L, fluoride 8.3mg/L, total cyanide 0.60mg/L, total arsenic 4.20mg/L, total mercury 0.06 mg/L. The experimental results are as follows: after 24 hours of operation, the zero discharge rate of wastewater is 99.9%, the average removal rate of CODcr is 99.9%, the average removal rate of TDS is 99.9%, and the equipment is stable in operation.
Example 2
The magnetoelectric desalter is used for treating the reverse osmosis concentrated high-salinity wastewater, and the water quality is as follows: pH value of 8.7 and CODCr2620mg/L, BOD543.2mg/L TDS 31000mg/L chloride 17300mg/L fluoride 7.7mg/L total cyanide 0.03mg/L total arsenic 0.19mg/L total mercury 0.24 mg/L. The experimental results are as follows: after 24 hours of operation, the zero discharge rate of wastewater is 99.8%, the average removal rate of CODcr is 99.9%, the average removal rate of TDS is 99.9%, and the equipment is stable in operation.
Example 3
The magnetoelectric desalter is used for treating pharmaceutical high-salinity wastewater, and the water quality is as follows: pH 6.3, CODCr7494.2mg/L, BOD592.8mg/L, 110600mgL TDS, 72300mg/L copper ions, 182.2mg/L fluoride, 2.92mg/L total cyanide, 4.56mg/L total arsenic and 90.3mg/L total mercury. The experimental results are as follows: after 24 hours of operation, the average TDS removal rate is 99.9%, the average CODcr removal rate is 98.9%, and the equipment operation is stable.
Compared with the traditional treatment method adopting the process of adding chemical agents, the method has the following remarkable advantages and effects:
1. the process method is carried out under the conditions of normal temperature and normal pressure, does not need to add chemical agents, only consumes a small amount of electric energy, has no secondary pollution, and greatly reduces the treatment cost.
2. The process method operates at normal temperature and normal pressure, the main equipment is made of conventional materials such as PE and the like, and anticorrosive materials such as nickel-based alloy or titanium alloy and the like are not needed, so that the investment cost is greatly reduced, and the process method has obvious economic benefit.
3. Short time for treating wastewater, high efficiency, less investment of treatment equipment and small occupied area.
4. The process method can realize zero discharge treatment of the high-salinity wastewater, realize no discharge of pollutants to the environment, protect the ecological environment and solve the key problem for the treatment of the high-salinity wastewater.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A method for zero discharge treatment of high-salinity wastewater is characterized by comprising the following steps: utilize magnetoelectric demineralizer, carry out the technology to raw water equalizing basin, tourmaline haydite filtering pond and high-efficient electromagnetic reactor promptly and ally oneself with usefulness to handle high salt waste water, realize the waste water zero release, magnetoelectric demineralizer includes: a raw water regulating tank (1), a tourmaline ceramsite filter tank (2), a forward osmosis reactor (3) and a cold source evaporator (4).
2. The method for high-salinity wastewater zero-discharge treatment according to claim 1, characterized in that:
the high-salinity wastewater is subjected to turbidity removal, the pH value is adjusted to 4-5, and then the water quality and the water quantity are stabilized by a raw water adjusting tank (1);
the effluent of the raw water regulating tank (1) is treated by a tourmaline ceramsite filter tank (2), and backwashing water of the tourmaline ceramsite filter tank (2) flows back to the raw water regulating tank (1);
the effluent of the tourmaline ceramsite filter tank (2) enters a forward osmosis reactor (3);
the absorption liquid of the forward osmosis reactor (3) absorbs pure water in the wastewater and then enters a cold source evaporator unit (4) for separation of the absorption liquid and the pure water;
the pure water outlet of the cold source evaporator unit (4) is recycled;
the liquid vapor drawn by the cold source evaporator unit (4) is condensed and reflows to the forward osmosis reactor (3);
the solid crystal residue in the cold source evaporator (4) is periodically scraped.
3. The method for high-salinity wastewater zero-discharge treatment according to claim 1, characterized in that: the water quality condition of the treated high-salinity wastewater is as follows: the pH value is 3.5-12.8, the CODCr is 700-90000 mg/L, the BOD5 is 90-600 mg/L, the TDS is 30000-170000 mg/L, the fluoride is 60-220 mg/L, the total cyanide is 0.01-98.2 mg/L, the total arsenic is 0.02-75.0 mg/L, and the total mercury is 0.06-800 mg/L.
4. The method for high-salinity wastewater zero-discharge treatment according to claim 1, characterized in that: the tank body of the raw water adjusting tank is preferably made of PE anticorrosive materials, and a pH adjusting agent adding device is preset at a water inlet of the tank body and is used for adjusting the water quantity and the pH value of water.
5. The method for high-salinity wastewater zero-discharge treatment according to claim 1, characterized in that: the tourmaline ceramsite filter tank adopts a conventional sand filter tank filtration backwashing working mode, the model is LDX-15, the manufacturer is Xiamenli new group, the filter material of the tourmaline ceramsite filter tank adopts nano tourmaline ceramsite, the model is synbiotic nano energy ball, and the manufacturer is Xiamenli new group.
6. The method for high-salinity wastewater zero-discharge treatment according to claim 1, characterized in that: the forward osmosis membrane of the forward osmosis reactor adopts a roll type forward osmosis membrane component, and the drawing liquid of the forward osmosis reactor adopts 3.14mol/L ammonium bicarbonate saturated solution.
7. The method for high-salinity wastewater zero-discharge treatment according to claim 1, characterized in that: the cold source evaporator unit adopts a system combining an electromagnetic reactor and a normal-temperature normal-pressure high-efficiency evaporation unit.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114573178A (en) * | 2022-02-23 | 2022-06-03 | 贵州欧瑞欣合环保股份有限公司 | Method for full-scale treatment of landfill leachate |
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| WO2014144778A1 (en) * | 2013-03-15 | 2014-09-18 | Porifera, Inc. | Advancements in osmotically driven membrane systems including multi-stage purification |
| CN104649502A (en) * | 2015-02-28 | 2015-05-27 | 厦门诺迪膜科技有限公司 | Method for zero discharge recycling of high-salt waste water with electromagnetic forward osmosis reactor |
| CN106904779A (en) * | 2017-03-29 | 2017-06-30 | 厦门诺迪膜科技有限公司 | A kind of high-salt wastewater low-temperature receiver evaporation zero discharge treatment and the method for reuse |
| WO2020049579A1 (en) * | 2018-09-07 | 2020-03-12 | Jani Jigar | Combinatorial membrane-based systems and methods for dewatering and concentrating applications |
| CN111606493A (en) * | 2020-06-04 | 2020-09-01 | 成都恩承科技股份有限公司 | Method for zero-emission treatment of high-salinity wastewater through electric steam energy evaporation |
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- 2020-12-29 CN CN202011597222.8A patent/CN112723638A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014144778A1 (en) * | 2013-03-15 | 2014-09-18 | Porifera, Inc. | Advancements in osmotically driven membrane systems including multi-stage purification |
| CN104649502A (en) * | 2015-02-28 | 2015-05-27 | 厦门诺迪膜科技有限公司 | Method for zero discharge recycling of high-salt waste water with electromagnetic forward osmosis reactor |
| CN106904779A (en) * | 2017-03-29 | 2017-06-30 | 厦门诺迪膜科技有限公司 | A kind of high-salt wastewater low-temperature receiver evaporation zero discharge treatment and the method for reuse |
| WO2020049579A1 (en) * | 2018-09-07 | 2020-03-12 | Jani Jigar | Combinatorial membrane-based systems and methods for dewatering and concentrating applications |
| CN111606493A (en) * | 2020-06-04 | 2020-09-01 | 成都恩承科技股份有限公司 | Method for zero-emission treatment of high-salinity wastewater through electric steam energy evaporation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114573178A (en) * | 2022-02-23 | 2022-06-03 | 贵州欧瑞欣合环保股份有限公司 | Method for full-scale treatment of landfill leachate |
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