CN216073444U - High salt waste water softens and removes hard and retrieval and utilization processing system - Google Patents
High salt waste water softens and removes hard and retrieval and utilization processing system Download PDFInfo
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- CN216073444U CN216073444U CN202121660504.8U CN202121660504U CN216073444U CN 216073444 U CN216073444 U CN 216073444U CN 202121660504 U CN202121660504 U CN 202121660504U CN 216073444 U CN216073444 U CN 216073444U
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Abstract
The utility model discloses a softening, hardness-removing and recycling treatment system for high-salinity wastewater, which comprises a comprehensive adjusting tank unit, a chemical softening unit, a sludge concentration unit, a tubular microfiltration membrane unit, a primary reverse osmosis unit, a multi-medium filtration unit, a secondary reverse osmosis unit, an evaporative crystallization unit, a dosing system and a recycling water tank unit which are sequentially connected through pipelines; the reuse water tank unit comprises a reuse water tank, and the chemical softening efficiency is further improved by arranging two sections of soft water reaction tanks; the tubular microfiltration membrane unit is arranged to replace a traditional high-efficiency sedimentation tank, so that the treatment efficiency is ensured, the occupied area of the device is reduced, and the process flow is simplified; by arranging the multi-medium filtering unit, the problem of pollution and blockage of the membrane system can be effectively solved; the concentrated water outlet treatment of the RO2 device is completed by arranging the evaporation crystallization unit, so that the zero discharge of liquid water is realized.
Description
Technical Field
The utility model belongs to the technical field of industrial sewage treatment, and particularly relates to a high-salinity wastewater softening, hardness removing and recycling treatment system.
Background
At present, with the continuous expansion of industrial scales of high-water-consumption industries such as petrochemical industry, coal chemical industry, Liquefied Natural Gas (LNG) and the like in China, the production amount of wastewater in the production process is rapidly increased, and the wastewater is called high-salinity wastewater which has the characteristics of high Total Dissolved Solids (TDS) content, high concentration (high hardness) of easy-scaling ions (Ca2+ and Mg2+), high alkalinity and the like.
If the high-salinity wastewater is directly discharged without being treated, not only can serious water environment pollution be caused, but also great waste of water resources can be caused. In addition, with the continuous tightening of the national environmental protection policy in recent years, the reasonable disposal of high-salinity wastewater has become one of the benefits of the production and development of related enterprises. The exploration of the high-efficiency treatment technology of the high-salinity wastewater is not only the necessary requirement of environmental protection, but also the necessary way for the vigorous development of enterprises.
The treatment process of the high-salinity wastewater can be roughly divided into softening hardness removal and recycling treatment processes. Wherein, softening and hardness removal mainly refers to the process of removing the hardness part (mainly permanent hardness) or completely removing the hardness part in water; the recycling treatment mainly refers to the process of using the softened and hardness-removed high-salinity wastewater for daily production after secondary treatment and/or advanced treatment.
The softening and hardness removal of the high-salinity wastewater is the basis of subsequent recycling treatment, and the softening and hardness removal effect directly influences the recycling treatment result. Common wastewater softening techniques include lime softening and its combination, adsorption and ion exchange, membrane separation, and the like. Wherein, the lime softening method and the combined process thereof are common high-salinity wastewater softening and hardness-removing technologies. The technology has the advantages of wide medicament source, low operation cost, capability of being carried out simultaneously with the flocculation process and the like, but the problems of higher medicament cost, large equipment floor area, unsmooth pollution discharge, dirty and messy site, low treatment efficiency and the like are not ignored.
The membrane treatment technology represented by a reverse osmosis method becomes a mainstream technology for recycling and treating high-salinity wastewater, and has the advantages of mild separation conditions, compact equipment structure, high automation degree and the like. However, the problems of easy fouling and scaling on the membrane surface, limited stability, drug resistance and solvent resistance and the like are not negligible.
In addition, the problems that the hardness removal of the traditional high-density tank is not thorough, reverse osmosis concentrated water is treated inefficiently or even is not treated, the automation degree of the treatment process is low, the operation cost is high and the like are urgently needed to be solved in the existing high-salinity wastewater treatment industry.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a high-salinity wastewater softening, hardness-removing and recycling treatment system which has the advantages of high automation degree, stable operation, good treatment effect and low operation cost and can realize zero discharge of liquid water.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a high salt waste water softens and removes hard and retrieval and utilization processing system, includes through pipeline consecutive comprehensive equalizing basin unit, chemical softening unit, sludge concentration unit, tubular microfiltration membrane unit, one-level reverse osmosis unit, multi-media filter unit, second grade reverse osmosis unit, evaporation crystallization unit, medicine system unit and reuse water pond unit, reuse water pond unit includes the reuse water pond.
Preferably, the comprehensive adjusting tank unit comprises a comprehensive adjusting tank, and a water inlet of the comprehensive adjusting tank is connected with the wastewater input pipeline.
Preferably, the chemical softening unit comprises a soft water reaction tank and a soft water circulation tank, the water outlet of the comprehensive adjusting tank is connected with the water inlet of the soft water reaction tank through a pipeline, and the water outlet of the soft water reaction tank is connected with the water inlet of the soft water circulation tank through a pipeline.
Preferably, the sludge concentration unit comprises a sludge concentration tank and a plate-and-frame filter press; the discharge port of the soft water circulating tank is connected with the feed port of the sludge concentration tank through a pipeline, and the discharge port of the sludge concentration tank is connected with the feed port of the plate-and-frame filter press through a sewage pipeline.
Preferably, the tubular microfiltration membrane unit comprises a tubular microfiltration membrane device, a chemical cleaning water tank A, a chemical cleaning water tank B, a neutralization tank and a post-filtration water tank; the water outlet of the soft water circulating pool is connected with the water inlet of the tubular microfiltration membrane device through a pipeline, the water inlet of the tubular microfiltration membrane device is also connected with the water outlet of the chemical cleaning water tank A and the water outlet of the chemical cleaning water tank B through pipelines, the water outlet of the tubular microfiltration membrane device is connected with the water inlet of the soft water circulating pool and the water inlet of the neutralization pool through pipelines, and the neutralization pool is provided with two water outlets which are connected with the flushing/backwashing water inlet of the tubular microfiltration membrane device and the water inlet of the post-filtration pool through pipelines.
Preferably, the primary reverse osmosis unit comprises an RO1 cartridge filter, an RO1 device, an RO chemical cleaning water tank and an RO1 thick water tank; the water outlet of the filtered water tank is connected with the water inlet of the RO1 security filter through a pipeline, the water outlet of the RO1 security filter is connected with the water inlet of the RO1 device through a pipeline, the RO1 device is provided with four water outlets which are respectively connected with the water inlet of the filtered water tank, the water inlet of the RO chemical cleaning water tank, the water inlet of the RO1 concentrated water tank and the water inlet of the reuse water tank through pipelines, and the water outlet of the RO chemical cleaning water tank is also connected with the water inlet of the RO1 device through a pipeline.
Preferably, the multi-media filter unit comprises an activated carbon filter and a resin water softener; the water outlet of the RO1 concentrated water tank is connected with the water inlet of the activated carbon filter through a pipeline, and the water outlet of the activated carbon filter is connected with the water inlet of the resin water softener through a pipeline.
Preferably, the secondary reverse osmosis unit comprises an RO2 water inlet tank, an RO2 cartridge filter and an RO2 device; the delivery port of resin water softener passes through the pipeline with the water inlet of RO2 intake sump and links to each other, RO2 intake sump is equipped with two delivery ports, respectively with activated carbon filter's backwash water inlet, the backwash water inlet of resin water softener and the water inlet of RO2 cartridge filter pass through the pipeline and link to each other, the delivery port of RO2 cartridge filter passes through the pipeline with the water inlet of RO2 device and links to each other, RO2 device has four delivery ports, respectively with the water inlet of RO chemical cleaning water tank, the water inlet of RO2 intake sump, the water inlet of concentrated brine tank and the water inlet of reuse pond pass through the pipeline and link to each other. The water outlet of the RO chemical cleaning water tank is also connected with the water inlet of the RO2 device through a pipeline.
Preferably, the evaporative crystallization unit comprises a concentrated brine tank, a separator, a thickener, a centrifuge and a mother liquor tank; the water outlet of the thick brine tank is connected with the water inlet of the separator through a pipeline, the water outlet of the separator is connected with the water inlet of the reuse water tank through a pipeline, the discharge port of the separator is connected with the feed port of the thick device through a pipeline, the discharge port of the thick device is connected with the feed port of the centrifugal machine through a pipeline, the discharge port of the centrifugal machine is connected with the water inlet of the mother liquid tank through a pipeline, and the water outlet of the mother liquid tank is connected with the water inlet of the thick brine tank through a pipeline.
Preferably, the dosing system unit comprises a lime dosing tank, a sodium carbonate dosing tank, a sodium hypochlorite dosing tank, a sodium hydroxide dosing tank, an iron salt dosing tank, a hydrochloric acid dosing tank, a reducing agent dosing tank, a scale inhibitor dosing tank and a non-oxidizing bactericide dosing tank; the water outlet of the lime dosing tank is connected with the water inlet of the soft water reaction tank through a pipeline, the water outlet of the sodium carbonate dosing tank is connected with the water inlet of the soft water reaction tank through a pipeline, the water outlet of the sodium hypochlorite dosing tank is respectively connected with the water inlet of the soft water reaction tank, the water inlet of the chemical cleaning water tank A and the water inlet of the RO chemical cleaning water tank through pipelines, the water outlet of the sodium hydroxide dosing tank is respectively connected with the water inlet of the soft water reaction tank, the water inlet of the chemical cleaning water tank A and the water inlet of the RO chemical cleaning water tank through pipelines, the water outlet of the ferric salt dosing tank is connected with the feed inlet of the plate-and-frame filter press through a pipeline, the water outlet of the hydrochloric acid dosing tank is respectively connected with the water inlet of the neutralization tank, the water inlet of the chemical cleaning water tank B and the water inlet of the RO chemical cleaning water tank through pipelines, the water outlet of the reducing agent dosing tank is respectively connected with the water inlet of the neutralization tank, the water inlet of the sodium carbonate dosing tank and the water inlet of the RO chemical cleaning tank, The water inlet of the RO1 device is connected with the water inlet of the RO2 device through a pipeline, the water outlet of the scale inhibitor dosing box is respectively connected with the water inlet of the RO1 device and the water inlet of the RO2 device through pipelines, and the water outlet of the non-oxidizing bactericide dosing box is respectively connected with the water inlet of the RO1 device and the water inlet of the RO2 device through pipelines.
Compared with the prior art, the utility model has the beneficial effects that: the chemical softening efficiency is further improved by arranging two sections of soft water reaction tanks; the tubular microfiltration membrane unit is arranged to replace a traditional high-efficiency sedimentation tank, so that the treatment efficiency is ensured, the occupied area of the device is reduced, and the process flow is simplified; by arranging the multi-medium filtering unit, the problem of pollution and blockage of the membrane system can be effectively solved; the concentrated water outlet treatment of the RO2 device is completed by arranging an evaporation crystallization unit, so that zero emission of liquid water is realized; the DCS device is arranged to realize the automatic stable operation of the treatment system of the utility model, thereby reducing the operation cost; the overall recovery rate of the treatment system is more than or equal to 98 percent and is far higher than that of the traditional treatment mode.
Drawings
FIG. 1 is a schematic flow diagram of the system of the present invention;
in the figure: 1-a comprehensive regulating pool unit; 1.1-comprehensive regulating reservoir; 1.2-wastewater input pipeline; 2-a chemical softening unit; 2.1-soft water reaction tank; 2.2-soft water circulation tank; 3-a sludge concentration unit; 3.1-sludge concentration tank; 3.2-plate and frame filter press; 4-tubular microfiltration membrane unit; 4.1-tubular microfiltration membrane device; 4.2-chemical cleaning water tank A; 4.3-chemical cleaning water tank B; 4.4-neutralization tank; 4.5-a post-filtration water tank and 5-a first-stage reverse osmosis unit; 5.1-RO1 Postopfilter; 5.2-RO1 device; 5.3-RO chemical cleaning water tank; 5.4-RO1 dense water pool; 6-a multi-media filtration unit; 6.1-activated carbon filter; 6.2-resin water softener; 7-a secondary reverse osmosis unit; 7.1-RO2 water intake pool; 7.2-RO2 Postopfilter; 7.3-RO2 device; 8-evaporative crystallization unit; 8.1-strong brine tank; 8.2-a separator; 8.3-thickener; 8.4-centrifuge; 8.5-mother liquor tank; 9-a dosing system unit; 9.1-lime dosing tank; 9.2-sodium carbonate dosing tank; 9.3-sodium hypochlorite dosing box; 9.4-sodium hydroxide dosing tank; 9.5-iron salt dosing tank; 9.6-hydrochloric acid dosing tank; 9.7-reductant dosing tank; 9.8-antisludging agent dosing box; 9.9-non-oxidizing biocide dosing box; 10-a reuse water tank unit; 10.1-reuse water pool.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1, the present invention provides a technical solution: a high-salinity wastewater softening, hardness-removing and recycling treatment system comprises a comprehensive adjusting tank unit 1, a chemical softening unit 2, a sludge concentration unit 3, a tubular microfiltration membrane unit 4, a primary reverse osmosis unit 5, a multi-medium filtration unit 6, a secondary reverse osmosis unit 7, an evaporative crystallization unit 8, a dosing system unit 9 and a recycling water tank unit 10 which are sequentially connected through pipelines; the reuse tank unit 10 includes a reuse tank.
In this embodiment, preferably, the comprehensive adjusting tank unit 1 includes a comprehensive adjusting tank 1.1, a water inlet of the comprehensive adjusting tank 1.1 is connected with the wastewater input pipeline 1.2, and the comprehensive adjusting tank unit 1 can adjust the water quantity and stabilize the water quality.
In this embodiment, it is preferable that the chemical softening unit 2 includes a soft water reaction tank 2.1 and a soft water circulation tank 2.2; the water outlet of the comprehensive adjusting tank 1.1 is connected with the water inlet of the soft water reaction tank 2.1 through a pipeline, the water outlet of the soft water reaction tank 2.1 is connected with the water inlet of the soft water circulation tank 2.2 through a pipeline, and the chemical softening unit 2 can obviously remove permanent hardness in wastewater.
In this embodiment, preferably, the sludge concentration unit 3 includes a sludge concentration tank 3.1 and a plate-and-frame filter press 3.2; the discharge port of the soft water circulating tank 2.2 is connected with the feed port of the sludge concentration tank 3.1 through a pipeline, the discharge port of the sludge concentration tank 3.1 is connected with the feed port of the plate-and-frame filter press 3.2 through a sewage pipeline, and the sludge concentration unit 3 can effectively reduce the water content of sludge and reduce the volume of the sludge.
In this embodiment, preferably, the tubular microfiltration membrane unit 4 includes a tubular microfiltration membrane device 4.1, a chemical cleaning water tank a4.2, a chemical cleaning water tank B4.3, a neutralization tank 4.4 and a post-filtration water tank 4.5; the water outlet of the soft water circulating pool 2.2 is connected with the water inlet of the tubular micro-filtration membrane device 4.1 through a pipeline, the water inlet of the tubular micro-filtration membrane device 4.1 is also connected with the water outlet of the chemical cleaning water tank A4.2 and the water outlet of the chemical cleaning water tank B4.3 through pipelines, the water outlet of the tubular micro-filtration membrane device 4.1 is connected with the water inlet of the soft water circulating pool 2.2 and the water inlet of the neutralization pool 4.4 through pipelines, the neutralization pool 4.4 is provided with two water outlets which are respectively connected with the flushing/backwashing water inlet of the tubular micro-filtration membrane device 4.1 and the water inlet of the post-filtration pool 4.5 through pipelines, and the tubular micro-filtration membrane unit can further realize the softening and hardness removal process of high-salinity wastewater and the mud-water separation process of sludge.
In this embodiment, the primary reverse osmosis unit 5 preferably comprises an RO1 cartridge filter 5.1, an RO1 device 5.2, an RO chemical cleaning water tank 5.3 and an RO1 thick water tank 5.4; the water outlet of the filtered water tank 4.5 is connected with the water inlet of the RO1 cartridge filter 5.1 through a pipeline, the water outlet of the RO1 cartridge filter 5.1 is connected with the water inlet of the RO1 device 5.2 through a pipeline, the RO1 device 5.2 is provided with four water outlets which are respectively connected with the water inlet of the filtered water tank 4.5, the water inlet of the RO chemical cleaning water tank 5.3, the water inlet of the RO1 concentrated water tank 5.4 and the water inlet of the reuse water tank 10.1 through pipelines, the water outlet of the RO chemical cleaning water tank 5.3 is also connected with the water inlet of the RO1 device 5.2 through a pipeline, and the primary reverse osmosis unit can effectively remove impurities such as dissolved salt, bacteria, colloid and the like in water.
In this embodiment, it is preferable that the multi-media filter unit 6 includes an activated carbon filter 6.1 and a resin water softener 6.2; the water outlet of the RO1 concentrated water tank 5.4 is connected with the water inlet of the activated carbon filter 6.1 through a pipeline, the water outlet of the activated carbon filter 6.1 is connected with the water inlet of the resin water softener 6.2 through a pipeline, and the multi-media filtering unit 6 is mainly used for treating concentrated water outlet of the primary reverse osmosis unit, so that the problem of pollution and blockage of a subsequent secondary reverse osmosis unit membrane system is effectively alleviated.
In this embodiment, the secondary reverse osmosis unit 7 preferably comprises an RO2 water inlet tank 7.1, an RO2 cartridge filter 7.2 and an RO2 unit 7.3; the water outlet of the resin water softener 6.2 is connected with the water inlet of an RO2 water inlet pool 7.1 through a pipeline, the RO2 water inlet pool 7.1 is provided with two water outlets which are respectively connected with the backwashing water inlet of the activated carbon filter 6.1, the backwashing water inlet of the resin water softener 6.2 and the water inlet of an RO2 cartridge filter 7.2 through pipelines, the water outlet of the RO2 cartridge filter 7.2 is connected with the water inlet of an RO2 device 7.3 through a pipeline, the RO2 device 7.3 is provided with four water outlets which are respectively connected with the water inlet of an RO chemical cleaning water tank 5.3, the water inlet of an RO2 water inlet pool 7.1, the water inlet of a strong brine tank 8.1 and the water inlet of a reuse water pool 10.1 through pipelines; the water outlet of the RO chemical cleaning water tank 5.3 is also connected with the water inlet of the RO2 device 7.3 through a pipeline, and the secondary reverse osmosis unit 7 mainly aims at the concentrated water outlet of the primary reverse osmosis unit for further treatment.
In this embodiment, preferably, the evaporative crystallization unit 8 includes a concentrated brine tank 8.1, a separator 8.2, a thickener 8.3, a centrifuge 8.4, and a mother liquor tank 8.5; the delivery port of thick brine jar 8.1 passes through the pipeline with the water inlet of separator 8.2 and links to each other, the delivery port of separator 8.2 passes through the pipeline with reuse water basin 10.1's water inlet and links to each other, the discharge gate of separator 8.2 passes through the pipeline with the feed inlet of thick ware 8.3 and links to each other, the discharge gate of thick ware 8.3 passes through the pipeline with centrifuge 8.4's feed inlet and links to each other, centrifuge 8.4's discharge gate passes through the pipeline with mother liquor jar 8.5's water inlet and links to each other, mother liquor jar 8.5's delivery port passes through the pipeline with the water inlet of thick brine jar 8.1 and links to each other, evaporation crystallization unit 8 mainly used RO2 device dense water high efficiency processing, thereby guarantee the utility model discloses realize liquid water "zero release".
In this embodiment, preferably, the dosing system unit 9 includes a lime dosing tank 9.1, a sodium carbonate dosing tank 9.2, a sodium hypochlorite dosing tank 9.3, a sodium hydroxide dosing tank 9.4, an iron salt dosing tank 9.5, a hydrochloric acid dosing tank 9.6, a reducing agent dosing tank 9.7, a scale inhibitor dosing tank 9.8, and a non-oxidizing bactericide dosing tank 9.9; the water outlet of the lime dosing tank 9.1 is connected with the water inlet of the soft water reaction tank 2.1 through a pipeline, the water outlet of the sodium carbonate dosing tank 9.2 is connected with the water inlet of the soft water reaction tank 2.1 through a pipeline, the water outlet of the sodium hypochlorite dosing tank 9.3 is respectively connected with the water inlet of the soft water reaction tank 2.1, the water inlet of the chemical cleaning water tank A4.2 and the water inlet of the RO chemical cleaning water tank 5.3 through pipelines, the water outlet of the sodium hydroxide dosing tank 9.4 is respectively connected with the water inlet of the soft water reaction tank 2.1, the water inlet of the chemical cleaning water tank A4.2 and the water inlet of the RO chemical cleaning water tank 5.3 through pipelines, the water outlet of the ferric salt dosing tank 9.5 is connected with the feed inlet of the plate and frame filter press 3.2 through a pipeline, the water outlet of the hydrochloric acid dosing tank 9.6 is respectively connected with the water inlet of the neutralization tank 4.4, the water inlet of the chemical cleaning water tank B4.3 and the water inlet of the chemical cleaning water tank 5.3 through pipelines, the water outlet of the reducing agent dosing tank 9.7 is respectively connected with the water inlet of the neutralization tank 4.4 and the water inlet of the neutralization tank 4.4 through a pipeline, The water inlet of the RO1 device 5.2 is connected with the water inlet of the RO2 device 7.3 through a pipeline, the water outlet of the scale inhibitor dosing box 9.8 is respectively connected with the water inlet of the RO1 device 5.2 and the water inlet of the RO2 device 7.3 through pipelines, the water outlet of the non-oxidizing bactericide dosing box 9.9 is respectively connected with the water inlet of the RO1 device 5.2 and the water inlet of the RO2 device 7.3 through pipelines, and the dosing system unit 9 mainly supplies various medicament requirements in the operation process of each unit of the treatment system.
In this embodiment, preferably, a submersible mixer is provided in the integrated regulating reservoir 1.1 of the integrated regulating reservoir unit 1.
In this embodiment, preferably, the soft water reaction tank 2.1 is a two-stage tank, and the wastewater softening process is realized by adding lime, sodium carbonate, sodium hypochlorite and sodium hydroxide into the tank respectively.
In this embodiment, preferably, an iron salt dosing device is arranged at a water inlet of the plate-and-frame filter press 3.2 of the sludge concentration unit 3, and is used for conditioning the sludge and reducing the water content of the sludge.
In the embodiment, preferably, the tubular microfiltration membrane unit 4 adopts a tubular microfiltration membrane technology to replace a traditional high-efficiency sedimentation tank to realize sludge-water separation of softened sludge, and the effluent can directly enter the RO1 device 5.2, so that the occupied area is reduced, and the process flow is simplified.
The working principle and the using process of the utility model are as follows: 1) various industrial high-salinity wastewater enters a comprehensive regulating reservoir 1.1 through a wastewater conveying pipeline 1.2 to achieve the purposes of regulating water quantity and stabilizing water quality;
2) the high-salinity wastewater in the comprehensive adjusting tank 1.1 enters a soft water reaction tank 2.1 through an adjusting tank lift pump, and lime (removing Mg2+ in the wastewater), sodium carbonate (removing Ca2+ in the wastewater), sodium hypochlorite (oxidizing macromolecular complexes in the wastewater) and sodium hydroxide (adjusting pH and cooperatively removing Mg2+ and Ca2+ in the wastewater) are respectively added;
3) the water produced by the soft water reaction tank 2.1 overflows to the soft water circulation tank 2.2, and then enters the tubular microfiltration membrane device 4.1 through the tubular microfiltration membrane circulating pump to be subjected to microfiltration treatment, wherein the microfiltration process is a membrane process which takes static pressure difference as a driving force and utilizes the sieving effect of a screen-shaped filter medium membrane to perform separation;
4) sludge generated by the soft water circulating pool 2.2 enters the sludge concentration pool 3.1 through the sludge discharge pump, and the water content and the volume of the sludge are reduced through sludge thickening, so that the subsequent treatment cost is reduced; concentrated sludge produced by the sludge concentration tank 3.1 enters a plate-and-frame filter press 3.2 through a sludge feeding pump so as to realize the sludge-water separation process of the sludge;
5) after 4.1 produced water of the tubular microfiltration membrane device enters a neutralization tank 4.4, hydrochloric acid (for adjusting the pH value) and a reducing agent (for removing oxidative free chlorine or combined chlorine) are respectively added, so that the service life of the membrane system is prolonged; the water produced by the neutralization tank 4.4 overflows to a filtered water tank 4.5 to be treated by a subsequent first-stage reverse osmosis unit 5;
6) the water produced by the filtered water pool 4.5 enters an RO1 cartridge filter 5.1 through an RO1 booster pump to be further filtered, so that large particles in the wastewater are prevented from entering a subsequent reverse osmosis membrane, and the normal operation of a reverse osmosis unit is ensured; the water produced by the RO1 cartridge filter 5.1 enters an RO1 device 5.2 through an RO1 high-pressure pump for reverse osmosis treatment; the reverse osmosis process refers to a process that impurities in water permeating through the reverse osmosis membrane are intercepted by the reverse osmosis membrane and carried out under the action of pressure;
7) the standard-reaching produced water of an RO1 device 5.2 mainly enters a reuse water tank 10.1, part of qualified produced water is supplied to an RO chemical cleaning water tank 5.3, the produced water of concentrated water of the RO1 device 5.2 is divided into two paths, one path of the produced water is returned to a filtered water tank 4.5 for retreatment, and the other path of the produced water enters an RO1 concentrated water tank 4.5 for further subsequent treatment;
8) the water produced by the RO1 concentrated water tank 4.5 sequentially enters an active carbon filter 6.1 and a resin water softener 6.2 through an RO1 concentrated water lift pump for filtering and softening treatment, wherein the active carbon filter 6.1 absorbs residual chlorine which cannot be removed in the previous stage of filtration by filling active carbon in the tank body so as to prevent a rear stage reverse osmosis membrane from being subjected to oxidative degradation; the resin water softener 6.2 further replaces hardness ions in the RO1 concentrated water by filling resin in the tank body through an ion exchange technology, so that the hardness of the concentrated water is reduced; the water produced by the resin water softener 6.2 enters an RO2 water inlet pool 7.1 for further subsequent treatment;
9) the water produced by the RO2 water inlet pool 7.1 enters the RO2 cartridge filter 7.2 through the RO2 booster pump to further filter the water, so as to prevent large particles in the wastewater from entering a subsequent reverse osmosis membrane and ensure the normal operation of a reverse osmosis unit; the water produced by the RO2 cartridge filter 7.2 enters an RO2 device 7.3 through an RO2 high-pressure pump for reverse osmosis treatment; the reverse osmosis process refers to a process that impurities in water permeating through the reverse osmosis membrane are intercepted by the reverse osmosis membrane and carried out under the action of pressure;
10) the standard-reaching produced water of the RO2 device 7.3 mainly enters a reuse water tank 10.1, part of qualified produced water is supplied to an RO chemical cleaning water tank 5.3, the produced water of the concentrated water of the RO1 device 7.3 is divided into two paths, one path of the produced water is returned to an RO2 water inlet tank 7.1 for retreatment, and the other path of the produced water enters a concentrated salt water tank 8.1 for subsequent evaporative crystallization treatment; the treatment flow of the second-stage reverse osmosis unit 7 is basically consistent with that of the first-stage reverse osmosis unit 5, and the second-stage reverse osmosis unit 7 is provided with two stages of reverse osmosis units to further improve the quality of the outlet water;
11) the water produced in the concentrated brine tank 8.1 enters the separator 8.2 through a concentrated water lifting pump, steam is simultaneously sent into the separator 8.2 through a steam pipeline, the concentrated water finishes the treatment process in the separator 8.2 by means of a circulating water pump and a heat exchanger, the product of the separator 8.2 comprises steam condensate and high-temperature concentrated brine, wherein the steam condensate enters the reuse water tank 10.1, the high-temperature concentrated brine enters the thickener 8.3 for cooling, the high-temperature concentrated brine enters the centrifuge 8.4 for desalting after being fully cooled, the water produced in the mother liquor tank 8.5 enters the mother liquor tank 8.5, the produced miscellaneous salt is transported and treated, and the water produced in the mother liquor tank 8.5 can return to the concentrated brine tank 8.1 for retreatment through the circulating water pump, so that the zero discharge of the liquid water is realized.
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 utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a high salt waste water softens and removes hard and retrieval and utilization processing system which characterized in that: comprises a comprehensive adjusting pool unit (1), a chemical softening unit (2), a sludge concentration unit (3), a tubular microfiltration membrane unit (4), a primary reverse osmosis unit (5), a multi-medium filtration unit (6), a secondary reverse osmosis unit (7), an evaporation crystallization unit (8), a dosing system unit (9) and a reuse water pool unit (10) which are connected in sequence through pipelines; the reuse water tank unit (10) comprises a reuse water tank.
2. The high-salinity wastewater softening, hardness-removing and recycling treatment system according to claim 1, characterized in that: the comprehensive adjusting tank unit (1) comprises a comprehensive adjusting tank (1.1), and a water inlet of the comprehensive adjusting tank (1.1) is connected with a wastewater input pipeline (1.2).
3. The high-salinity wastewater softening, hardness-removing and recycling treatment system according to claim 2, characterized in that: the chemical softening unit (2) comprises a soft water reaction tank (2.1) and a soft water circulating tank (2.2); the water outlet of the comprehensive adjusting tank (1.1) is connected with the water inlet of the soft water reaction tank (2.1) through a pipeline, and the water outlet of the soft water reaction tank (2.1) is connected with the water inlet of the soft water circulating tank (2.2) through a pipeline.
4. The high-salinity wastewater softening, hardness-removing and recycling treatment system according to claim 3, characterized in that: the sludge concentration unit (3) comprises a sludge concentration tank (3.1) and a plate-and-frame filter press (3.2); the discharge hole of the soft water circulating tank (2.2) is connected with the feed inlet of the sludge concentration tank (3.1) through a pipeline, and the discharge hole of the sludge concentration tank (3.1) is connected with the feed inlet of the plate-and-frame filter press (3.2) through a sewage pipeline.
5. The high-salinity wastewater softening, hardness-removing and recycling treatment system according to claim 4, characterized in that: the tubular microfiltration membrane unit (4) comprises a tubular microfiltration membrane device (4.1), a chemical cleaning water tank A (4.2), a chemical cleaning water tank B (4.3), a neutralization pond (4.4) and a post-filtration water tank (4.5); the water outlet of the soft water circulating pool (2.2) is connected with the water inlet of the tubular microfiltration membrane device (4.1) through a pipeline, the water inlet of the tubular microfiltration membrane device (4.1) is also connected with the water outlet of the chemical cleaning water tank A (4.2) and the water outlet of the chemical cleaning water tank B (4.3) through pipelines respectively, the water outlet of the tubular microfiltration membrane device (4.1) is connected with the water inlet of the soft water circulating pool (2.2) and the water inlet of the neutralization pool (4.4) through pipelines respectively, the neutralization pool (4.4) is provided with two water outlets which are connected with the flushing/backwashing water inlet of the tubular microfiltration membrane device (4.1) and the water inlet of the filtered water pool (4.5) through pipelines respectively.
6. The high-salinity wastewater softening, hardness-removing and recycling treatment system according to claim 5, characterized in that: the primary reverse osmosis unit (5) comprises an RO1 cartridge filter (5.1), an RO1 device (5.2), an RO chemical cleaning water tank (5.3) and an RO1 concentrated water tank (5.4); the delivery port of post-filtration pond (4.5) passes through the pipeline with the water inlet of RO1 safety filter (5.1) and links to each other, the delivery port of RO1 safety filter (5.1) passes through the pipeline with the water inlet of RO1 device (5.2) and links to each other, RO1 device (5.2) have four delivery ports, respectively with the water inlet of post-filtration pond (4.5), the water inlet of RO chemical cleaning water tank (5.3), the water inlet of RO1 concentrated water tank (5.4) and the water inlet of reuse water pond (10.1) pass through the pipeline and link to each other, and RO chemical cleaning water tank (5.3) delivery port still passes through the pipeline with the water inlet of RO1 device (5.2) and links to each other.
7. The high-salinity wastewater softening, hardness-removing and recycling treatment system according to claim 6, characterized in that: the multi-medium filtering unit (6) comprises an activated carbon filter (6.1) and a resin water softener (6.2); the water outlet of the RO1 concentrated water tank (5.4) is connected with the water inlet of the activated carbon filter (6.1) through a pipeline, and the water outlet of the activated carbon filter (6.1) is connected with the water inlet of the resin water softener (6.2) through a pipeline.
8. The high-salinity wastewater softening, hardness-removing and recycling treatment system according to claim 7, characterized in that: the secondary reverse osmosis unit (7) comprises an RO2 water inlet tank (7.1), an RO2 cartridge filter (7.2) and an RO2 device (7.3); the water outlet of the resin water softener (6.2) is connected with the water inlet of an RO2 water inlet tank (7.1) through a pipeline, the RO2 water inlet tank (7.1) is provided with two water outlets which are respectively connected with the backwashing water inlet of the activated carbon filter (6.1), the backwashing water inlet of the resin water softener (6.2) and the water inlet of the RO2 security filter (7.2) through pipelines, the water outlet of the RO2 security filter (7.2) is connected with the water inlet of the RO2 device (7.3) through a pipeline, the RO2 device (7.3) is provided with four water outlets which are respectively connected with the water inlet of an RO chemical cleaning water tank (5.3), the water inlet of an RO2 water inlet tank (7.1), the water inlet of a concentrated brine tank (8.1) and the water inlet of a reuse water tank (10.1) through pipelines; the water outlet of the RO chemical cleaning water tank (5.3) is also connected with the water inlet of an RO2 device (7.3) through a pipeline.
9. The high-salinity wastewater softening, hardness-removing and recycling treatment system according to claim 8, characterized in that: the evaporative crystallization unit (8) comprises a concentrated brine tank (8.1), a separator (8.2), a thickener (8.3), a centrifuge (8.4) and a mother liquor tank (8.5); the water outlet of the concentrated brine tank (8.1) is connected with the water inlet of the separator (8.2) through a pipeline, the water outlet of the separator (8.2) is connected with the water inlet of the reuse water pool (10.1) through a pipeline, the discharge outlet of the separator (8.2) is connected with the feed inlet of the thickener (8.3) through a pipeline, the discharge outlet of the thickener (8.3) is connected with the feed inlet of the centrifuge (8.4) through a pipeline, the discharge outlet of the centrifuge (8.4) is connected with the water inlet of the mother liquor tank (8.5) through a pipeline, and the water outlet of the mother liquor tank (8.5) is connected with the water inlet of the concentrated brine tank (8.1) through a pipeline.
10. The high-salinity wastewater softening, hardness-removing and recycling treatment system according to claim 9, characterized in that: the medicine adding system unit (9) comprises a lime medicine adding box (9.1), a sodium carbonate medicine adding box (9.2), a sodium hypochlorite medicine adding box (9.3), a sodium hydroxide medicine adding box (9.4), an iron salt medicine adding box (9.5), a hydrochloric acid medicine adding box (9.6), a reducing agent medicine adding box (9.7), a scale inhibitor medicine adding box (9.8) and a non-oxidation bactericide medicine adding box (9.9); the water outlet of the lime dosing tank (9.1) is connected with the water inlet of the soft water reaction tank (2.1) through a pipeline, the water outlet of the sodium carbonate dosing tank (9.2) is connected with the water inlet of the soft water reaction tank (2.1) through a pipeline, the water outlet of the sodium hypochlorite dosing tank (9.3) is respectively connected with the water inlet of the soft water reaction tank (2.1), the water inlet of the chemical cleaning water tank A (4.2) and the water inlet of the RO chemical cleaning water tank (5.3) through pipelines, the water outlet of the sodium hydroxide dosing tank (9.4) is respectively connected with the water inlet of the soft water reaction tank (2.1), the water inlet of the chemical cleaning water tank A (4.2) and the water inlet of the RO chemical cleaning water tank (5.3) through pipelines, the water outlet of the ferric salt dosing tank (9.5) is connected with the feed inlet of the plate-and frame filter press (3.2) through a pipeline, the water outlet of the hydrochloric acid dosing tank (9.6) is respectively connected with the water inlet of the neutralization tank (4.4), the chemical cleaning water tank B (4.3), the pipeline and the chemical cleaning water tank (5.3) through pipelines And the water outlet of the reducing agent dosing box (9.7) is respectively connected with the water inlet of the neutralization pond (4.4), the water inlet of the RO1 device (5.2) and the water inlet of the RO2 device (7.3) through pipelines, the water outlet of the scale inhibitor dosing box (9.8) is respectively connected with the water inlet of the RO1 device (5.2) and the water inlet of the RO2 device (7.3) through pipelines, and the water outlet of the non-oxidizing bactericide dosing box (9.9) is respectively connected with the water inlet of the RO1 device (5.2) and the water inlet of the RO2 device (7.3) through pipelines.
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