CN210393752U - A divide matter crystallization device for waste water treatment production K2SO4 and NaCl - Google Patents
A divide matter crystallization device for waste water treatment production K2SO4 and NaCl Download PDFInfo
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- CN210393752U CN210393752U CN201920246647.0U CN201920246647U CN210393752U CN 210393752 U CN210393752 U CN 210393752U CN 201920246647 U CN201920246647 U CN 201920246647U CN 210393752 U CN210393752 U CN 210393752U
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Abstract
The utility model provides a divide matter crystallization device for waste water treatment production K2SO4 and NaCl, the device includes: the device comprises a regulating tank 1, an NF device 2, a membrane concentration device 3, a sodium chloride evaporative crystallization device 4, a reuse water tank 5, an AOP catalytic oxidation device 6, a sodium sulfate evaporative concentration and freezing device 7 and a potassium sulfate conversion device 8; the regulating tank 1, the NF device 2, the membrane concentration device 3 and the reuse water tank 5 are connected in sequence; the membrane concentration device 3, the sodium chloride evaporative crystallization device 4 and the reuse water tank 5 are sequentially connected; the NF device 2, the AOP catalytic oxidation device 6, the sodium sulfate evaporation concentration and freezing device 7 and the reuse water pool 5 are sequentially connected; the sodium sulfate evaporation concentration and freezing device 7, the potassium sulfate conversion device 8 and the sodium chloride evaporation crystallization device 4 are sequentially connected. The utility model provides a divide matter crystallization device for waste water treatment production K2S04 and NaCl realizes the whole recycle of high salt waste water, realizes the zero release.
Description
Technical Field
The utility model relates to a divide matter crystallization technology for waste water treatment production K2SO4 and NaCl belongs to the strong brine treatment field of recycling.
Background
The waste water of coal chemical industry, petrochemical industry, electric power, pharmacy and other industries is treated by biochemical treatment and membrane treatment, a large amount of strong brine is discharged, wherein the waste water contains high-concentration sodium sulfate, sodium chloride and other trace impurity salts, and also contains partial organic matters which are difficult to degrade, the direct discharge into water body can cause serious environmental pollution, the treatment and disposal requirements of the strong brine are higher and higher along with the stricter zero discharge requirement of the coal chemical industry at present, the conventional evaporation concentration and crystallization process has the advantages that the concentration multiple of an evaporator is lower, the influence of soluble organic matters is large, the recovery rate is unstable, most of the organic matters are concentrated in the strong water after passing through a membrane concentration system and then enter the evaporator, the foaming phenomenon of the evaporator is serious, the chroma of a crystal salt product is large, the quality of the crystal salt is seriously influenced, the crystal salt is difficult to recycle, the crystal salt can only be treated as dangerous waste, the cost of long-term operation of an enterprise is high, the burden is heavy, the long-term stable operation of zero discharge of strong brine cannot be guaranteed, and the sustainable development of the enterprise is greatly influenced. Meanwhile, the economic value of the sodium sulfate for recycling the crystallized salt is not high, so that the marketing is a difficult problem which troubles the recycling of the crystallized salt. If the sodium sulfate is converted into the potassium sulfate fertilizer with higher value, the problem of sale of the sodium sulfate is solved, and the value of the potassium sulfate is higher than that of the potassium chloride, so that the coal chemical industry and the salt chemical industry can be combined, and a technically reliable, economically feasible way is found for zero-emission crystalline salt in the coal chemical industry.
Disclosure of Invention
In view of there being above-mentioned weak point among the prior art, the utility model provides a divide matter crystallization device for waste water treatment production K2SO4 and NaCl, the device overcomes the processing system that single evaporation crystallization treatment strong brine leads to unstably, and the system energy consumption is high, and the difficult separation recycle of salt of crystallizing produces a large amount of dangers useless, is difficult to realize the defect of zero release.
An object of the utility model is to provide a divide matter crystallization device for waste water treatment production K2SO4 and NaCl solves the above-mentioned problem that prior art exists.
The utility model discloses a divide matter crystallization device for waste water treatment production K2SO4 and NaCl includes: the device comprises a regulating tank, an NF device, a membrane concentration device, a sodium chloride evaporative crystallization device, a reuse water tank, an AOP catalytic oxidation device, a sodium sulfate evaporative concentration and freezing device and a potassium sulfate conversion device; the regulating tank, the NF device, the membrane concentration device and the reuse water tank are sequentially connected; the membrane concentration device, the sodium chloride evaporative crystallization device and the reuse water tank are sequentially connected; the NF device, the AOP catalytic oxidation device, the sodium sulfate evaporation concentration and freezing device and the reuse water pool are sequentially connected; the sodium sulfate evaporation concentration and freezing device, the potassium sulfate conversion device and the sodium chloride evaporation crystallization device are sequentially connected.
In a preferable example, the water inlets of the regulating ponds are respectively connected with the water inlet of the high-salinity wastewater through pipelines.
In another preferred example, the water outlet of the regulating reservoir is connected with the water inlet of the NF device through a pipeline.
In another preferred example, the outlet of the fresh water side of the NF device is connected with the water inlet of the membrane concentration device through a pipeline, and the outlet of the concentrated water side of the NF device is connected with the water inlet of the AOP catalytic oxidation device through a pipeline.
In another preferred embodiment, the fresh water side water outlet of the membrane concentration device is respectively connected with the condensate outlet of the sodium chloride evaporative crystallization device, the condensate outlet of the sodium sulfate evaporative concentration and freezing device through a pipeline, and the mixture is then conveyed and mixed with the water inlet of the reuse water pool through a pipeline, and the concentrated water side water outlet of the membrane concentration device is connected with the mother liquor outlet of the potassium sulfate conversion device through a pipeline, and the mixture is then conveyed and mixed with the mother liquor outlet of the sodium chloride evaporative crystallization device through a pipeline.
In another preferred example, the water outlet of the AOP catalytic oxidation device is connected with the water inlet of the sodium sulfate evaporation concentration and freezing device through a pipeline.
In another preferred example, the water outlet of the sodium sulfate evaporation concentration and freezing device is connected with the water inlet of the potassium sulfate conversion device through a pipeline.
The utility model provides a pair of be used for waste water treatment production K2SO4 and NaCl's branch matter crystallization device
Has the following advantages:
(1) greatly reduces the processing amount of evaporative crystallization and freezing crystallization and saves the investment cost;
(2) the operation cost and the labor cost are reduced;
(3) the amount of miscellaneous salt is minimized as much as possible, the treatment cost of miscellaneous salt is greatly reduced, and the secondary harm degree of miscellaneous salt to the environment is minimized;
(4) the combined device can stably operate for a long time.
(5) High-purity sodium chloride and potassium sulfate can be obtained.
(6) The obtained potassium sulfate (fertilizer) with higher value not only solves the marketing problem of sodium sulfate, but also can combine the coal chemical industry and the salt chemical industry because the value of the potassium sulfate is higher than that of potassium chloride, and finds a technically reliable, economically feasible way for zero-emission crystallized salt in the coal chemical industry.
Drawings
The invention is further described with reference to the drawings and examples.
Description attached figure 1 is a schematic diagram of a mass-separation crystallization device for producing K2SO4 and NaCl through wastewater treatment.
In the attached drawings of the specification, the reference numerals are respectively an adjusting tank 1, an NF device 2, a membrane concentration device 3, a sodium chloride evaporative crystallization device 4, a reuse water tank 5, an AOP catalytic oxidation device 6, a sodium sulfate evaporative concentration and freezing device 7 and a potassium sulfate conversion device 8.
Detailed Description
In order to facilitate the understanding of the present invention, the following description is further provided with reference to the accompanying drawings and specific embodiments.
Referring to the attached drawings, the utility model provides a quality-divided crystallization device for producing K2SO4 and NaCl through wastewater treatment, the combined device comprises: the device comprises a regulating tank 1, an NF device 2, a membrane concentration device 3, a sodium chloride evaporative crystallization device 4, a reuse water tank 5, an AOP catalytic oxidation device 6, a sodium sulfate evaporative concentration and freezing device 7 and a potassium sulfate conversion device 8; the regulating tank 1, the NF device 2, the membrane concentration device 3 and the reuse water tank 5 are connected in sequence; the membrane concentration device 3, the sodium chloride evaporative crystallization device 4 and the reuse water tank 5 are sequentially connected; the NF device 2, the AOP catalytic oxidation device 6, the sodium sulfate evaporation concentration and freezing device 7 and the reuse water pool 5 are sequentially connected; the sodium sulfate evaporation concentration and freezing device 7, the potassium sulfate conversion device 8 and the sodium chloride evaporation crystallization device 4 are sequentially connected.
The water inlet of the regulating tank 1 is respectively connected with the water inlet of the high-salinity wastewater through a pipeline, and the water outlet of the regulating tank 1 is connected with the water inlet of the NF device 2 through a pipeline.
The fresh water side outlet of the NF device 2 is connected with the water inlet of the membrane concentration device 3 through a pipeline, and the concentrated water side outlet of the NF device 2 is connected with the water inlet of the AOP catalytic oxidation device 6 through a pipeline.
The membrane concentration device 3 fresh water side water outlet is respectively connected with the sodium chloride evaporative crystallization device 4 condensate water outlet, the sodium sulfate evaporative concentration and freezing device 7 condensate water outlet after being conveyed and mixed by pipelines and the reuse water pool 5 water inlet through a pipeline, and the membrane concentration device 3 concentrated water side water outlet and the potassium sulfate conversion device 8 mother liquor water outlet are conveyed and mixed by pipelines and then are connected with the sodium chloride evaporative crystallization device 4 water inlet through a pipeline.
And the water outlet of the AOP catalytic oxidation device 6 is connected with the water inlet of the sodium sulfate evaporation concentration and freezing device 7 through a pipeline.
The water outlet of the sodium sulfate evaporation concentration and freezing device 7 is connected with the water inlet of the potassium sulfate conversion device 8 through a pipeline.
The utility model discloses a divide matter crystallization device working process for waste water treatment production K2SO4 and NaCl as follows: high-salinity wastewater is homogenized and mediated by an adjusting tank 1 and then enters an NF device 2 to separate monovalent salt ions from divalent salt ions, separated water mainly containing monovalent salt ions is sent to a membrane concentration device 3 to be concentrated, the water produced by the membrane concentration device 3 enters a reuse water tank 5 to be reused, concentrated water of the membrane concentration device 3 enters a sodium chloride evaporative crystallization device 4 to be evaporated and crystallized to obtain high-purity NaCl crystallized monosalt, and condensate of the sodium chloride evaporative crystallization device 4 enters the reuse water tank 5 to be reused; a certain amount of organic matters are concentrated in the concentrated water of the NF device 2, most of the organic matters are removed by the AOP catalytic oxidation device 6 and then enter the sodium sulfate evaporation concentration and freezing device 7 for evaporation concentration and freezing, the obtained Na2SO 4.10H 2O crystal salt is sent to the potassium sulfate conversion device 8 for conversion to obtain high-purity K2SO4 crystal salt, the mother liquor generated by the potassium sulfate conversion device 8 is sent to the sodium chloride evaporation crystallization device 4 for evaporation crystallization to obtain high-purity NaCl crystal monosalt, and the condensate of the sodium sulfate evaporation concentration and freezing device 7 enters the reuse water pool 5 for reuse.
Through the utility model discloses an integrated processing apparatus handles, produces water as reuse water recycle to and adopt high concentration sodium sulfate directly to prepare the technology of potassium sulphate, with realize that high salt contains among the industrial waste water sodium chloride, sodium sulfate separation, turn into the higher potassium sulphate of economic value with sodium sulfate simultaneously, the zero release of the waste water of realizing simultaneously.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A kind of quality separation crystallization device used for producing K2SO4 and NaCl in the waste water treatment, its characteristic is that the said device includes: the device comprises a regulating tank (1), an NF device (2), a membrane concentration device (3), a sodium chloride evaporative crystallization device (4), a reuse water tank (5), an AOP catalytic oxidation device (6), a sodium sulfate evaporative concentration and freezing device (7) and a potassium sulfate conversion device (8); the regulating tank (1), the NF device (2), the membrane concentration device (3) and the reuse water tank (5) are sequentially connected; the membrane concentration device (3), the sodium chloride evaporative crystallization device (4) and the reuse water pool (5) are sequentially connected; the NF device (2), the AOP catalytic oxidation device (6), the sodium sulfate evaporation concentration and freezing device (7) and the reuse water pool (5) are sequentially connected; the sodium sulfate evaporation concentration and freezing device (7), the potassium sulfate conversion device (8) and the sodium chloride evaporation crystallization device (4) are sequentially connected.
2. The fractional crystallization device for wastewater treatment production of K2SO4 and NaCl according to claim 1, wherein the inlet of the regulating reservoir (1) is connected with the inlet of high-salinity wastewater through a pipeline, and the outlet of the regulating reservoir (1) is connected with the inlet of the NF device (2) through a pipeline.
3. The fractional crystallization device for wastewater treatment production of K2SO4 and NaCl according to claim 1, wherein the outlet on the fresh water side of the NF device (2) is connected with the inlet of the membrane concentration device (3) through a pipeline, and the outlet on the concentrated water side of the NF device (2) is connected with the inlet of the AOP catalytic oxidation device (6) through a pipeline.
4. The mass-separation crystallization device for wastewater treatment and production of K2SO4 and NaCl according to claim 1, wherein a fresh water side water outlet of the membrane concentration device (3) is respectively connected with a condensate water outlet of the sodium chloride evaporative crystallization device (4), a condensate water outlet of the sodium sulfate evaporative concentration and freezing device (7) through a pipeline, and then the condensate water outlet is mixed with a water inlet of the reuse water pool (5) through a pipeline, and a concentrated water side water outlet of the membrane concentration device (3) and a mother liquor water outlet of the potassium sulfate conversion device (8) are mixed through a pipeline, and then are connected with a water inlet of the sodium chloride evaporative crystallization device (4) through a pipeline.
5. The fractional crystallization device for wastewater treatment production of K2SO4 and NaCl according to claim 1, wherein the water outlet of the AOP catalytic oxidation device (6) is connected to the water inlet of the sodium sulfate evaporative concentration and freezing device (7) through a pipeline.
6. The mass-separation crystallization device for wastewater treatment and K2SO4 and NaCl production according to claim 1, wherein the water outlet of the sodium sulfate evaporation concentration and freezing device (7) is connected with the water inlet of the potassium sulfate conversion device (8) through a pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920246647.0U CN210393752U (en) | 2019-02-21 | 2019-02-21 | A divide matter crystallization device for waste water treatment production K2SO4 and NaCl |
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| CN201920246647.0U CN210393752U (en) | 2019-02-21 | 2019-02-21 | A divide matter crystallization device for waste water treatment production K2SO4 and NaCl |
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