CN215049413U - High salt water treatment facilities - Google Patents
High salt water treatment facilities Download PDFInfo
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- CN215049413U CN215049413U CN202022599948.7U CN202022599948U CN215049413U CN 215049413 U CN215049413 U CN 215049413U CN 202022599948 U CN202022599948 U CN 202022599948U CN 215049413 U CN215049413 U CN 215049413U
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Abstract
The embodiment of the utility model discloses high salt solution processing apparatus, include: the pretreatment device is used for pretreating high-salt water to obtain a first concentrated solution; the mechanical compression evaporation device is used for pre-concentrating the first concentrated solution to obtain a second concentrated solution; the inlet of the mechanical compression evaporation device is communicated with the outlet of the pretreatment device; the evaporative crystallization device is used for concentrating the second concentrated solution to obtain a third concentrated solution; the inlet of the evaporative crystallization device is communicated with the outlet of the mechanical compression evaporation device; the vacuum low-temperature evaporation device is used for concentrating the third concentrated solution to obtain salt mud; and the inlet of the vacuum low-temperature evaporation device is communicated with the outlet of the evaporative crystallization device. The device realizes the reduction rate of high salt water to be 99%.
Description
Technical Field
The utility model relates to a chemical industry and environmental protection technical field, in particular to high salt water processing apparatus.
Background
Under the new-period environment, a large amount of municipal garbage is inevitably generated in the urbanization development, leachate is formed in the stacking and landfill processes of the municipal garbage, and the leachate is very complex in component and contains a plurality of harmful substances, so that the leachate has the characteristics of complex and variable pollutant components, high organic pollutant concentration, high ammonia nitrogen concentration, high content of heavy metal ions and salt, large water quantity fluctuation, large treatment difficulty and the like.
The leachate treatment conventionally adopts the processes of pretreatment, UBF anaerobic treatment, external MBR, NF and RO. The treatment process flow has the characteristics of high efficiency and stability of treatment equipment, strong impact load resistance and stable effluent quality, belongs to a mature treatment process, has more successful application cases in China, and has the advantages that the water yield of the device designed purified water is not lower than 60 percent, and about 40 percent of high-salt water is generated.
The high-salinity water has the characteristic of high salt content, the conductivity is about 40000-50000 mu s/cm, the direct discharge can bring great harm to the natural environment, the pollution and the salt content increase of natural water bodies can be caused, or the problems of salinization, hardening and the like of soil can be caused. The conventional high-salt water treatment technology is divided into a membrane separation technology, a multi-effect evaporation technology, mechanical compression evaporation and the like. The membrane separation technology still produces partial wastewater with higher salinity, membrane pollution occurs, the treatment cost is high, and zero discharge of the wastewater cannot be realized. The multi-effect evaporation equipment is simple and can be operated intermittently, but the occupied area is large, the energy consumption is high, and scaling is easy. The mechanical recompression evaporation technology has low steam consumption and high reduction degree, but also has the problems of high equipment energy consumption, easy scaling of heat exchange surfaces and the like.
In order to solve the problems, a device capable of treating high-salinity water generated by the waste leachate membrane advanced treatment is urgently needed to be developed, and the device is used for solving the problems that the high-salinity water treatment process generated by the waste leachate membrane advanced treatment in the prior art is large in occupied area, high in energy consumption, easy to scale, low in reduction rate and the like.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model aims at providing a high salt solution processing apparatus utilizes "preliminary treatment + mechanical compression evaporation + evaporation crystallization + vacuum low temperature evaporation" combination processing, utilizes the characteristics that mechanical compression evaporation steam consumption is low, area is little, realizes high salt solution decrement rate 80 ~ 90%; the reduction rate of the high-salt water is further 99 percent by utilizing the characteristics of strong adaptability of the vacuum low-temperature evaporation device to raw materials and low energy consumption.
In order to achieve the above object, an embodiment of the present invention provides a high-salt water treatment apparatus, including:
the pretreatment device is used for pretreating high-salt water to obtain a first concentrated solution;
the mechanical compression evaporation device is used for pre-concentrating the first concentrated solution to obtain a second concentrated solution; the inlet of the mechanical compression evaporation device is communicated with the outlet of the pretreatment device;
the evaporative crystallization device is used for concentrating the second concentrated solution to obtain a third concentrated solution; the inlet of the evaporative crystallization device is communicated with the outlet of the mechanical compression evaporation device;
the vacuum low-temperature evaporation device is used for concentrating the third concentrated solution to obtain salt mud; and the inlet of the vacuum low-temperature evaporation device is communicated with the outlet of the evaporative crystallization device.
Further, the preprocessing device comprises:
the reaction device is used for reacting the high-salt water with the medicament to obtain reaction liquid and comprises a collecting tank and a doser which are communicated, wherein the collecting tank is used for collecting the high-salt water, and the doser is used for adding the medicament into the collecting tank;
a microfiltration membrane filtration device for filtering the reaction solution to obtain a precipitate and a first concentrated solution with gas; the inlet of the microfiltration membrane filtering device is communicated with the outlet of the collecting tank in the reaction device;
a degasser for removing said gas to obtain a first concentrate; the inlet of the degasser is communicated with the outlet of the microfiltration membrane filtering device.
Further, an external conveying pipe is arranged at the bottom of the microfiltration membrane filtering device and used for transporting the sediment outwards; the external conveying pipe is communicated with the bottom of the micro-filtration membrane filtering device.
Further, sodium hydroxide and sodium carbonate are arranged in the doser.
Further, the degasser is a heating assembly.
Further, the mechanical compression evaporation apparatus includes:
a falling film evaporator for heating and concentrating the first concentrated solution to obtain a second concentrated solution and primary steam; the inlet of the falling film evaporator is communicated with the outlet of the pretreatment device;
the mechanical compressor is used for compressing the primary steam and then pumping the compressed primary steam into the falling film evaporator for continuous evaporation; and a steam inlet of the mechanical compressor is communicated with a steam outlet of the falling film evaporator.
Further, the evaporative crystallization apparatus includes:
a flash tank for evaporating the second concentrated liquid to obtain a third concentrated liquid and secondary steam; an inlet of the flash tank is communicated with a liquid outlet of the falling film evaporator;
the steam compressor is used for compressing the secondary steam and then pumping the compressed secondary steam into the flash tank for continuous evaporation; a vapor inlet of the vapor compressor is in communication with a vapor outlet of the flash tank.
Further, the vacuum low-temperature evaporation device comprises:
the evaporation tank is used for evaporating the third concentrated solution to obtain tertiary steam; the inlet of the evaporation tank is communicated with the liquid outlet of the flash tank;
the vacuum pump is used for vacuumizing the evaporation tank; the vacuum pump is communicated with the evaporation tank;
and the condenser is used for condensing the tertiary steam to obtain condensed water, and an inlet of the condenser is communicated with a steam outlet of the evaporation tank.
Further, the high-salinity water is generated by advanced treatment of the waste leachate membrane, and the conductivity of the high-salinity water is 40000-50000 mu s/cm.
The embodiment of the utility model provides an in one or more technical scheme, following technological effect or advantage have at least:
the embodiment of the utility model provides a high salt water treatment facilities, utilize "preliminary treatment + mechanical compression evaporation + evaporative crystallization + vacuum low temperature evaporation" composite set, the preprocessing device for carry out the preliminary treatment with high salt water and obtain first concentrate; the mechanical compression evaporation device is used for pre-concentrating the first concentrated solution to obtain a second concentrated solution; the evaporative crystallization device is used for concentrating the second concentrated solution to obtain a third concentrated solution; the vacuum low-temperature evaporation device is used for concentrating the third concentrated solution to obtain salt slurry, and the reduction rate of the high-salt water is 80-90% by utilizing the characteristics of low consumption of mechanical compression evaporation steam and small occupied area; the reduction rate of the high-salt water is further 99 percent by utilizing the characteristics of strong adaptability of the vacuum low-temperature evaporation device to raw materials and low energy consumption.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a high-salt water treatment device provided by an embodiment of the present invention;
1. a pretreatment device; 11. a reaction device; 111. a collection tank; 1112. a medicine adding device; 12. a microfiltration membrane filtration device; 13. a deaerator;
2. a mechanical compression evaporation device; 21. a falling film evaporator; 22. a mechanical compressor;
3. an evaporative crystallization device; 31. a flash tank; 32. a vapor compressor;
4. a vacuum low temperature evaporation device; 41. an evaporator tank; 42. a vacuum pump; 43. a condenser.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent from the description. It will be understood by those skilled in the art that the present embodiments and examples are illustrative of the present invention, and are not to be construed as limiting the invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.
Unless otherwise specifically stated, the various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by an existing apparatus. The terms "first", "second", etc. in the present invention do not denote any order, but rather the terms "first", "second", etc. are used to indicate a sequence.
The embodiment of the utility model provides a technical scheme is for solving above-mentioned technical problem, and the general thinking is as follows:
the embodiment of the utility model provides a high salt solution processing apparatus, as shown in figure 1, include:
the pretreatment device 1 is used for pretreating high-salt water to obtain a first concentrated solution;
the mechanical compression evaporation device 2 is used for pre-concentrating the first concentrated solution to obtain a second concentrated solution; the inlet of the mechanical compression evaporation device is communicated with the outlet of the pretreatment device 1;
the evaporative crystallization device 3 is used for concentrating the second concentrated solution to obtain a third concentrated solution; the inlet of the evaporative crystallization device is communicated with the outlet of the mechanical compression evaporation device 2;
the vacuum low-temperature evaporation device 4 is used for concentrating the third concentrated solution to obtain salt slurry; the inlet of the vacuum low-temperature evaporation device is communicated with the outlet of the evaporative crystallization device 3.
According to the above, the embodiment of the utility model provides a pair of high salt water processing apparatus, high salt water is handled through preprocessing device 1, mechanical compression evaporation plant 2, evaporation crystallization device 3, vacuum low temperature evaporation plant 4 in proper order and is obtained the salt mud, utilizes "preprocessing + mechanical compression evaporation + evaporation crystallization + vacuum low temperature evaporation" combination processing technology, utilizes mechanical compression evaporation steam consumption low, characteristics that area is little, realizes high salt water decrement rate 80 ~ 90%; the reduction rate of the high-salt water is further 99 percent by utilizing the characteristics of strong adaptability of the vacuum low-temperature evaporation device to raw materials and low energy consumption.
As an alternative embodiment, the pretreatment device 1 comprises:
the reaction device 11 is used for reacting the high-salt water with the medicament to obtain a reaction liquid, the reaction device 11 comprises a collecting tank 111 and a doser 112 which are communicated, the collecting tank 111 is used for collecting the high-salt water, and the doser 112 is used for adding the medicament into the collecting tank;
a microfiltration membrane filtration device 12 for filtering the reaction solution to obtain a precipitate and a first concentrated solution with gas; the inlet of the microfiltration membrane filtering device 12 is communicated with the outlet of the collecting tank 111 in the reaction device 11;
a deaerator 13 for deaerating said gas to obtain a first concentrated liquid; the inlet of the degasser 13 is communicated with the outlet of the microfiltration membrane filtration device 12.
In this embodiment, sodium hydroxide and sodium carbonate are provided in the doser. The reaction device 11 forms calcium, magnesium and silicon ions in water into precipitates by adding medicaments such as sodium hydroxide, sodium carbonate and the like, a microfiltration membrane filtering device 12 is adopted for filtering, so that subsequent equipment is prevented from scaling, and a degasser 13 is adopted for removing carbon dioxide and oxygen in water so as to reduce corrosion to the device.
As an alternative embodiment, the bottom of the microfiltration membrane filtration device 12 is provided with an external conveying pipe for transporting the precipitate out; the external conveying pipe is communicated with the bottom of the micro-filtration membrane filtering device.
As an alternative embodiment, the degasser is a heating assembly. Carbon dioxide and oxygen in the water are removed by heating to reduce corrosion to the device.
As an alternative embodiment, the mechanical compression evaporation apparatus 2 includes:
a falling film evaporator 21 for heating and concentrating the first concentrated solution to obtain a second concentrated solution and primary steam; the inlet of the falling film evaporator 21 is communicated with the outlet of the pretreatment device 1;
the mechanical compressor 22 is used for compressing the primary steam and then pumping the compressed primary steam into the falling film evaporator for continuous evaporation; the vapor inlet of the mechanical compressor 22 is in communication with the vapor outlet of the falling film evaporator 21.
The first concentrated solution generated by the pretreatment device 1 enters the mechanical compression evaporation device 2, the falling-film evaporator 21 pre-concentrates the high-salt water, the high-salt water is used for heating and concentrating the first concentrated solution to obtain a second concentrated solution and primary steam, the primary steam is compressed by the mechanical compressor 22 to generate secondary steam, the secondary steam with improved heat energy is fed into the heater to continuously evaporate the stock solution heated by the stock solution to generate secondary steam, and a continuous evaporation state is realized;
preferably, the evaporative crystallization apparatus 3 includes:
a flash tank 31 for evaporating the second concentrated liquid to obtain a third concentrated liquid and secondary steam; the inlet of the flash tank 31 is communicated with the liquid outlet of the falling film evaporator 21;
the steam compressor 32 is used for compressing the secondary steam and then pumping the compressed secondary steam into the flash tank for continuous evaporation; the vapor inlet of the vapor compressor 32 communicates with the vapor outlet of the flash tank 31.
The second concentrated solution generated by the mechanical compression evaporation device 2 enters the evaporative crystallization device 3, and the second concentrated solution is evaporated in a flash tank 31 to obtain a third concentrated solution and secondary steam; the reduction rate of the high-salt water of the third concentrated solution is about 80-90%;
preferably, the vacuum low-temperature evaporation apparatus 4 includes:
an evaporation tank 41 for evaporating the third concentrated solution to obtain tertiary steam; the inlet of the evaporation tank 41 is in communication with the liquid outlet of the flash tank 32;
a vacuum pump 42 for evacuating the evaporation tank; the vacuum pump 42 is communicated with the evaporation tank 41;
and the condenser 43 is used for condensing the tertiary steam to obtain condensed water, and an inlet of the condenser 43 is communicated with a steam outlet of the evaporation tank 41.
The third concentrated solution generated by the evaporative crystallization device enters the vacuum low-temperature evaporation device 4, the vacuum low-temperature evaporation device comprises an evaporation tank, a vacuum pump, a condenser and the like, the third concentrated solution is heated in the evaporation tank through steam, the pressure is about-70 kpa under the action of the vacuum pump, the third concentrated solution reaches a boiling point at 50 ℃, the third concentrated solution is continuously evaporated and completely evaporated to dryness to obtain the salt slurry, and the high-salinity water reduction rate can reach 99%. In the treatment process, all the high-salt water evaporation condensate water enters the sewage treatment device and is discharged after reaching the standard after being treated.
Preferably, the high-salinity water is generated by advanced treatment of a garbage leachate membrane, and the conductivity of the high-salinity water is 40000-50000 mu s/cm.
All the high-salt water evaporation condensate water enters the sewage treatment device and is discharged after reaching the standard after being treated in the treatment process of the mechanical compression evaporation device, the evaporation crystallization device and the vacuum low-temperature evaporation device.
A high brine treatment apparatus of the present application will be described in detail with reference to examples, comparative examples and experimental data.
This example provides a method for treating high salt water generated by deep treatment of waste leachate membrane, as shown in fig. 1, the apparatus comprises: the device comprises a pretreatment device 1, a mechanical compression evaporation device 2, an evaporation crystallization device 3 and a vacuum low-temperature evaporation device 4;
the reaction device 11 is used for reacting the high-salt water with the medicament to obtain a reaction liquid, the reaction device 11 comprises a collecting tank 111 and a doser 112 which are communicated, the collecting tank 111 is used for collecting the high-salt water, and the doser 112 is used for adding the medicament into the collecting tank;
a microfiltration membrane filtration device 12 for filtering the reaction solution to obtain a precipitate and a first concentrated solution with gas; the inlet of the microfiltration membrane filtering device 12 is communicated with the outlet of the collecting tank 111 in the reaction device 11;
a deaerator 13 for deaerating said gas to obtain a first concentrated liquid; the inlet of the degasser 13 is communicated with the outlet of the microfiltration membrane filtration device 12.
The first concentrated solution generated by the pretreatment device 1 enters the mechanical compression evaporation device 2, calcium, magnesium and silicon ions in the water form precipitates by adding medicaments such as sodium hydroxide and sodium carbonate into the high-salinity water pretreatment device, the precipitates are filtered by adopting a microfiltration membrane, the subsequent equipment is prevented from scaling, and simultaneously carbon dioxide and oxygen in the water are removed by preheating, so that the corrosion to the device is reduced;
the mechanical compression evaporation apparatus 2 includes:
a falling film evaporator 21 for heating and concentrating the first concentrated solution to obtain a second concentrated solution and primary steam; the inlet of the falling film evaporator 21 is communicated with the outlet of the pretreatment device 1;
the mechanical compressor 22 is used for compressing the primary steam and then pumping the compressed primary steam into the falling film evaporator for continuous evaporation; the vapor inlet of the mechanical compressor 22 is in communication with the vapor outlet of the falling film evaporator 21.
The second concentrated solution generated by the mechanical compression evaporation device 2 enters the evaporative crystallization device, the mechanical compression evaporation device comprises a falling film evaporator and a mechanical compressor, high-salt water is pre-concentrated, external steam is adopted to heat the high-salt water to generate secondary steam, the secondary steam is compressed by the steam compressor, the secondary steam with improved heat energy is fed into a heater to continuously evaporate the stock solution heated by the stock solution to generate secondary steam, and a continuous evaporation state is realized;
the evaporative crystallization apparatus 3 includes:
a flash tank 31 for evaporating the second concentrated liquid to obtain a third concentrated liquid and secondary steam; the inlet of the flash tank 31 is communicated with the liquid outlet of the falling film evaporator 21;
the steam compressor 32 is used for compressing the secondary steam and then pumping the compressed secondary steam into the flash tank for continuous evaporation; the vapor inlet of the vapor compressor 32 communicates with the vapor outlet of the flash tank 31.
The third concentrated solution generated by the evaporative crystallization device 3 enters the vacuum low-temperature evaporation device, the second concentrated solution is heated and evaporated in a flash tank to form steam, and the steam is compressed in two stages to be used as a heat source of the evaporative crystallization device;
the vacuum low-temperature evaporation device 4 comprises:
an evaporation tank 41 for evaporating the third concentrated solution to obtain tertiary steam; the inlet of the evaporation tank 41 is in communication with the liquid outlet of the flash tank 32;
a vacuum pump 42 for evacuating the evaporation tank; the vacuum pump 42 is communicated with the evaporation tank 41;
and the condenser 43 is used for condensing the tertiary steam to obtain condensed water, and an inlet of the condenser 43 is communicated with a steam outlet of the evaporation tank 41.
The vacuum low-temperature evaporation device 4 comprises an evaporation tank, a vacuum pump and a condenser, wherein the vacuum pump is communicated with the evaporation tank; heating the third concentrated solution in an evaporation tank by steam, keeping the pressure at about-70 kpa under the action of a vacuum pump, reaching the boiling point at 50 ℃, continuously evaporating, and completely evaporating to obtain the salt slurry. In the treatment process, all the high-salt water evaporation condensate water enters the sewage treatment device and is discharged after reaching the standard after being treated.
Finally, it should be further noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, apparatus, article, or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, apparatus, article, or device.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A high brine treatment plant, characterized in that it comprises:
the pretreatment device is used for pretreating high-salt water to obtain a first concentrated solution;
the mechanical compression evaporation device is used for pre-concentrating the first concentrated solution to obtain a second concentrated solution; the inlet of the mechanical compression evaporation device is communicated with the outlet of the pretreatment device;
the evaporative crystallization device is used for concentrating the second concentrated solution to obtain a third concentrated solution; the inlet of the evaporative crystallization device is communicated with the outlet of the mechanical compression evaporation device;
the vacuum low-temperature evaporation device is used for concentrating the third concentrated solution to obtain salt mud; and the inlet of the vacuum low-temperature evaporation device is communicated with the outlet of the evaporative crystallization device.
2. The high brine treatment plant according to claim 1, wherein said pretreatment unit comprises:
the reaction device is used for reacting the high-salt water with the medicament to obtain reaction liquid and comprises a collecting tank and a doser which are communicated, wherein the collecting tank is used for collecting the high-salt water, and the doser is used for adding the medicament into the collecting tank;
a microfiltration membrane filtration device for filtering the reaction solution to obtain a precipitate and a first concentrated solution with gas; the inlet of the microfiltration membrane filtering device is communicated with the outlet of the collecting tank in the reaction device;
a degasser for removing said gas to obtain a first concentrate; the inlet of the degasser is communicated with the outlet of the microfiltration membrane filtering device.
3. The high-salinity water treatment device according to claim 2, wherein the bottom of the microfiltration membrane filtration device is provided with an external conveying pipe for transporting the precipitate; the external conveying pipe is communicated with the bottom of the micro-filtration membrane filtering device.
4. The high brine treatment apparatus of claim 2, wherein the degasser is a heating assembly.
5. A high brine treatment device according to claim 1, wherein said mechanical compression evaporation device comprises:
a falling film evaporator for heating and concentrating the first concentrated solution to obtain a second concentrated solution and primary steam; the inlet of the falling film evaporator is communicated with the outlet of the pretreatment device;
the mechanical compressor is used for compressing the primary steam and then pumping the compressed primary steam into the falling film evaporator for continuous evaporation; and a steam inlet of the mechanical compressor is communicated with a steam outlet of the falling film evaporator.
6. The high brine treatment apparatus according to claim 5, wherein said evaporative crystallization apparatus comprises:
a flash tank for evaporating the second concentrated liquid to obtain a third concentrated liquid and secondary steam; an inlet of the flash tank is communicated with a liquid outlet of the falling film evaporator;
the steam compressor is used for compressing the secondary steam and then pumping the compressed secondary steam into the flash tank for continuous evaporation; a vapor inlet of the vapor compressor is in communication with a vapor outlet of the flash tank.
7. A high brine treatment plant according to claim 6, wherein said vacuum cryogenic evaporation plant comprises:
the evaporation tank is used for evaporating the third concentrated solution to obtain tertiary steam; the inlet of the evaporation tank is communicated with the liquid outlet of the flash tank;
the vacuum pump is used for vacuumizing the evaporation tank; the vacuum pump is communicated with the evaporation tank;
and the condenser is used for condensing the tertiary steam to obtain condensed water, and an inlet of the condenser is communicated with a steam outlet of the evaporation tank.
8. The high-salinity water treatment device according to claim 1, wherein the high-salinity water is high-salinity water generated by deep treatment of a waste leachate membrane, and the conductivity of the high-salinity water is 40000-50000 μ s/cm.
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| CN202022599948.7U CN215049413U (en) | 2020-11-11 | 2020-11-11 | High salt water treatment facilities |
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| CN202022599948.7U CN215049413U (en) | 2020-11-11 | 2020-11-11 | High salt water treatment facilities |
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