CN215517058U - High-salt high-concentration organic wastewater treatment device - Google Patents
High-salt high-concentration organic wastewater treatment device Download PDFInfo
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- CN215517058U CN215517058U CN202022586429.7U CN202022586429U CN215517058U CN 215517058 U CN215517058 U CN 215517058U CN 202022586429 U CN202022586429 U CN 202022586429U CN 215517058 U CN215517058 U CN 215517058U
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Abstract
The utility model relates to wastewater treatment, in particular to a high-salt high-concentration organic wastewater treatment device and method. A high-salt high-concentration organic wastewater treatment device is characterized by comprising: the device comprises an adjusting tank, an intermediate water tank and a clean water tank, wherein the adjusting tank is connected with the intermediate water tank through a hardness removal unit and an electrodialysis desalination unit, the intermediate water tank is provided with an MVR evaporation unit, and the intermediate water tank is connected with the clean water tank through a UASB unit and an MBR unit. The utility model has the beneficial effects that: the membrane separation process, the MVR evaporation process, the advanced oxidation process, the anaerobic biochemical process and the MBR process are combined, so that the defects of high energy consumption and high construction cost of the traditional direct evaporation process are overcome, and the purposes of reducing evaporation capacity, energy consumption and construction cost are realized.
Description
Technical Field
The utility model relates to wastewater treatment, in particular to a high-salt high-concentration organic wastewater treatment device.
Background
Along with the industrial process of China, various industrial enterprises generate a large amount of high-salt and high-concentration organic wastewater every year. The high-salt organic wastewater usually contains a large amount of inorganic salt and organic matters, namely organic matter content CODCr is more than 10000mg/L and no less than 3.5 percent of soluble solids, wherein the salt content is represented by sodium chloride concentration, and the salt content is no less than 1 percent by mass. The high-salt organic wastewater has the characteristics of high salinity, high COD concentration, complex components and the like, and because the high-salt organic wastewater contains soluble inorganic salts with higher concentration and refractory organic matters, the high-salt organic wastewater can cause serious influence on soil and natural water bodies when being directly discharged without treatment, and can bring irreversible harm to the natural environment and human health.
Because the high-salt high-concentration organic wastewater has high-concentration soluble inorganic salt and refractory organic matters, the high-salt high-concentration organic wastewater cannot be directly treated by a biochemical process, and the conventional process firstly adopts an MVR evaporation technology to remove the inorganic salt in the wastewater and then carries out biochemical treatment, the process has higher construction cost and energy consumption. Therefore, the exploration and development of a new method and a new device for treating the high-salt high-concentration organic wastewater have important significance for environmental protection, energy conservation and emission reduction in China.
The traditional high-salt high-concentration organic wastewater treatment process mainly adopts MVR evaporation and biochemical treatment process, and has the following defects:
(1) the required evaporation capacity is large, and the energy consumption is high;
(2) the high-salt high-concentration organic wastewater contains high-concentration Cl < - >, the MVR evaporator and matched pipes, pipe fittings and valves need to be made of titanium materials, and the construction cost is high;
(3) the evaporator occupies a large area.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of overcoming the defects in the prior art and provides a device and a method for treating high-salt high-concentration organic wastewater.
The utility model is realized by the following technical scheme:
a high-salt high-concentration organic wastewater treatment device comprises: the device comprises an adjusting tank, an intermediate water tank and a clean water tank, wherein the adjusting tank is connected with the intermediate water tank through a hardness removal unit and an electrodialysis desalination unit, the intermediate water tank is provided with an MVR evaporation unit, and the intermediate water tank is connected with the clean water tank through a UASB unit and an MBR unit.
A regulating pool: the device is used for adjusting the water quality and the water quantity of the high-salt high-concentration organic wastewater and ensuring the stable operation of the subsequent treatment process;
a hardness removing unit: removing Ca in high-salt high-concentration organic wastewater2+And Mg2+The scaling risk of the subsequent treatment unit is avoided;
an electrodialysis desalination unit: and (3) removing salt in the high-salt high-concentration organic wastewater by adopting an electrodialysis process, feeding electrodialysed fresh water into a subsequent treatment unit, and feeding the concentrated water into an MVR evaporation unit. The electrodialysis concentration rate can reach 90%, so the evaporation capacity of the MVR device can be reduced by 90%;
MVR evaporation unit: removing salt in the electrodialysis concentrated water, feeding the evaporated condensate water and the electrodialysis fresh water into a subsequent treatment unit together, and transporting the evaporated crystal salt;
a middle water tank: the device is used for collecting fresh water generated by the electrodialysis unit and evaporated condensed water generated by the MVR evaporation device;
an advanced oxidation device: the device is used for removing refractory organic matters in the wastewater, improving the biodegradability of the wastewater and reducing the organic load of a subsequent biochemical treatment unit;
UASB unit: further reducing COD of the wastewater to meet the water inlet condition of the MBR unit;
MBR unit: used for reducing COD concentration and suspended matter concentration in the wastewater;
a clean water tank: for collecting water produced by the MBR unit.
According to the above technical solution, preferably, the electrodialysis desalination unit includes a plurality of electrodialysis modules, each electrodialysis module includes a plurality of membranes, and the membranes are made of one of Polyethylene (PE), Polysulfone (PFS) or polyoxyethylene.
According to the above technical solution, preferably, the advanced oxidation device is one of a catalytic oxidation device, an ozone oxidation device or a micro electrolysis device.
According to the above technical solution, preferably, the MBR unit includes a plurality of membrane modules, and the membrane modules are one of flat membrane and hollow fiber membrane.
According to the above technical solution, preferably, the membrane element of the MBR unit is made of one of polyvinylidene fluoride (PVDF), Polytetrafluoroethylene (PTFE), Polyethersulfone (PES), or Polysulfone (PFS).
A method for treating high-salt high-concentration organic wastewater comprises the following steps:
(1) the method comprises the following steps that (1) raw water of high-salt high-concentration organic wastewater enters a regulating reservoir to regulate water quality and water quantity so as to ensure stable operation of a subsequent treatment process;
(2) the wastewater of the regulating reservoir enters a hardness removal unit through a lift pump, and Ca2+ and Mg2+ in the wastewater are removed;
(3) the effluent of the hardness removing unit enters an electrodialysis unit to remove salt in the wastewater, fresh water enters an intermediate water tank, and concentrated water enters an MVR evaporation unit;
(4) the electrodialysis concentrated water enters an MVR evaporation unit to remove salt in the electrodialysis concentrated water, the evaporation condensed water enters a subsequent treatment unit, and crystallized salt is transported outwards;
(5) electrodialytic fresh water and MVR evaporation condensed water enter an intermediate water tank together;
(6) the wastewater in the middle water tank enters the UASB unit through a lift pump;
(7) the effluent of the UASB unit enters an MBR unit;
(8) and (4) enabling water produced by the MBR unit to enter a clean water tank.
The utility model has the beneficial effects that:
(1) according to the method and the device for treating the high-salt high-concentration organic wastewater, the membrane separation process, the MVR evaporation process, the advanced oxidation process, the anaerobic biochemical process and the MBR process are combined, so that the defects of high energy consumption and high construction cost of the traditional direct evaporation process are overcome, and the purposes of reducing evaporation capacity, energy consumption and construction cost are realized;
(2) the utility model adopts the advanced oxidation and biochemical composite process to reduce the organic matters in the wastewater, thereby not only avoiding the defect of high operating cost of the simple advanced oxidation process, but also overcoming the adverse effect of high-concentration refractory organic matters on a biochemical system.
Drawings
Fig. 1 shows a schematic front view of an embodiment of the present invention.
In the figure: 1. the system comprises a regulating tank, 2, a hardness removal unit, 3, an electrodialysis desalination unit, 4, an MVR evaporation unit, 5, an intermediate water tank, 6, an UASB unit, 7, an MBR unit and 8, a clean water tank.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the following preferred embodiments.
The utility model relates to a high-salt high-concentration organic wastewater treatment device, which comprises: the device comprises an adjusting tank, an intermediate water tank and a clean water tank, wherein the adjusting tank is connected with the intermediate water tank through a hardness removal unit and an electrodialysis desalination unit, the intermediate water tank is provided with an MVR evaporation unit, and the intermediate water tank is connected with the clean water tank through a UASB unit and an MBR unit.
An adjusting tank 1: the device is used for adjusting the water quality and the water quantity of the high-salt high-concentration organic wastewater and ensuring the stable operation of the subsequent treatment process;
the hardness removing unit 2: removing Ca in high-salt high-concentration organic wastewater2+And Mg2+The scaling risk of the subsequent treatment unit is avoided;
electrodialysis desalination unit 3: and (3) removing salt in the high-salt high-concentration organic wastewater by adopting an electrodialysis process, feeding electrodialysed fresh water into a subsequent treatment unit, and feeding the concentrated water into an MVR evaporation unit. The electrodialysis concentration rate can reach 90%, so the evaporation capacity of the MVR device can be reduced by 90%;
MVR evaporation unit 4: removing salt in the electrodialysis concentrated water, feeding the evaporated condensate water and the electrodialysis fresh water into a subsequent treatment unit together, and transporting the evaporated crystal salt;
and (5) an intermediate water tank: the device is used for collecting fresh water generated by the electrodialysis unit and evaporated condensed water generated by the MVR evaporation device;
an advanced oxidation device: the device is used for removing refractory organic matters in the wastewater, improving the biodegradability of the wastewater and reducing the organic load of a subsequent biochemical treatment unit;
UASB unit 6: further reducing COD of the wastewater to meet the water inlet condition of the MBR unit;
MBR unit 7: used for reducing COD concentration and suspended matter concentration in the wastewater;
the clean water tank 8: for collecting water produced by the MBR unit.
According to the above embodiment, preferably, the electrodialysis desalination unit includes a plurality of electrodialysis modules, each electrodialysis module includes a plurality of membranes, and the membranes are made of one of Polyethylene (PE), Polysulfone (PFS), and polyoxyethylene.
According to the above embodiment, preferably, the advanced oxidation device is one of a catalytic oxidation device, an ozone oxidation device, and a micro electrolysis device.
According to the above embodiment, preferably, the MBR unit includes a plurality of membrane modules, and the membrane modules are one of flat membrane and hollow fiber membrane.
According to the above embodiment, preferably, the membrane element of the MBR unit is made of one of polyvinylidene fluoride (PVDF), Polytetrafluoroethylene (PTFE), Polyethersulfone (PES), and Polysulfone (PFS).
A method for treating high-salt high-concentration organic wastewater comprises the following steps:
(1) the method comprises the following steps that (1) raw water of high-salt high-concentration organic wastewater enters a regulating reservoir to regulate water quality and water quantity so as to ensure stable operation of a subsequent treatment process;
(2) the wastewater of the regulating reservoir enters a hardness removal unit through a lift pump, and Ca2+ and Mg2+ in the wastewater are removed;
(3) the effluent of the hardness removing unit enters an electrodialysis unit to remove salt in the wastewater, fresh water enters an intermediate water tank, and concentrated water enters an MVR evaporation unit;
(4) the electrodialysis concentrated water enters an MVR evaporation unit to remove salt in the electrodialysis concentrated water, the evaporation condensed water enters a subsequent treatment unit, and crystallized salt is transported outwards;
(5) electrodialytic fresh water and MVR evaporation condensed water enter an intermediate water tank together;
(6) the wastewater in the middle water tank enters the UASB unit through a lift pump;
(7) the effluent of the UASB unit enters an MBR unit;
(8) and (4) enabling water produced by the MBR unit to enter a clean water tank.
The utility model has the beneficial effects that:
(1) according to the method and the device for treating the high-salt high-concentration organic wastewater, the membrane separation process, the MVR evaporation process, the advanced oxidation process, the anaerobic biochemical process and the MBR process are combined, so that the defects of high energy consumption and high construction cost of the traditional direct evaporation process are overcome, and the purposes of reducing evaporation capacity, energy consumption and construction cost are realized;
(2) the utility model adopts the advanced oxidation and biochemical composite process to reduce the organic matters in the wastewater, thereby not only avoiding the defect of high operating cost of the simple advanced oxidation process, but also overcoming the adverse effect of high-concentration refractory organic matters on a biochemical system.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A high-salt high-concentration organic wastewater treatment device is characterized by comprising: the device comprises an adjusting tank, an intermediate water tank and a clean water tank, wherein the adjusting tank is connected with the intermediate water tank through a hardness removal unit and an electrodialysis desalination unit, the intermediate water tank is provided with an MVR evaporation unit, and the intermediate water tank is connected with the clean water tank through a UASB unit and an MBR unit.
2. The apparatus for treating high-salinity high-concentration organic wastewater according to claim 1, characterized in that: the electrodialysis desalination unit comprises a plurality of electrodialysis modules, each electrodialysis module comprises a plurality of membranes, and the membranes are made of Polyethylene (PE), Polysulfone (PFS) or polyoxyethylene.
3. The apparatus for treating high-salinity high-concentration organic wastewater according to claim 1, characterized in that: the advanced oxidation device is one of a catalytic oxidation device, an ozone oxidation device or a micro-electrolysis device.
4. The apparatus for treating high-salinity high-concentration organic wastewater according to claim 1, characterized in that: the MBR unit comprises a plurality of membrane modules, and the membrane modules are one of flat membrane or hollow fiber membrane.
5. The apparatus for treating high-salinity high-concentration organic wastewater according to claim 1, characterized in that: the membrane element of the MBR unit is made of one of polyvinylidene fluoride (PVDF), Polytetrafluoroethylene (PTFE), polyether sulfone (PES) or Polysulfone (PFS).
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| CN202022586429.7U CN215517058U (en) | 2020-11-10 | 2020-11-10 | High-salt high-concentration organic wastewater treatment device |
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| CN202022586429.7U CN215517058U (en) | 2020-11-10 | 2020-11-10 | High-salt high-concentration organic wastewater treatment device |
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