High-salt antibiotic wastewater treatment device

Abstract

The utility model discloses a high-salt antibiotic wastewater treatment device which comprises a DT membrane filtering assembly, a forced crystallization assembly and a crystallized salt separating and drying assembly which are sequentially communicated, the DT membrane filtering assembly is used for filtering and separating wastewater, and the forced crystallization assembly is used for concentrating and crystallizing wastewater. The crystallized salt separating and drying assembly is used for separating and drying crystallized salt, and a salt outlet pipeline of the crystallized salt separating and drying assembly is communicated with the crystallized salt temporary storage device. According to the high-salt antibiotic wastewater treatment device disclosed by the utility model, a process of synergistically combining the DT membrane filtering component, the forced crystallization component and the crystallized salt separating and drying component is adopted, so that sodium chloride in antibiotic wastewater can be continuously, efficiently and quickly separated and purified; the method has the advantages of simple operation process, strong operability and controllability, high recovery rate, and capability of obtaining sodium chloride meeting the standard of being reused for an antibiotic production line, meets the requirements of production and reuse, is energy-saving and environment-friendly, and reduces the operation cost.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a device for treating high-salt antibiotic wastewater. Background Technology

[0002] Antibiotic pharmaceutical wastewater contains high concentrations of organic matter, high suspended solids, and recalcitrant biodegradable substances. It is characterized by complex water composition, high salinity, and large fluctuations in water quality, making it a challenging and critical area for wastewater treatment (due to its large volume and high salinity). The industry commonly employs traditional biological treatment systems and deep oxidation processes before further treatment in subsequent wastewater treatment processes. However, the high salinity leads to relatively low biodegradability, with the B / C ratio (Biodegradability (BOD / COD), where a B / C greater than 0.4 indicates acceptable biodegradability) generally less than 0.35. Large fluctuations in water quality easily impact wastewater treatment systems, resulting in low operational stability. Furthermore, inorganic salts cannot be completely degraded by microorganisms, leading to pollutant transfer and secondary pollution, making it difficult to achieve wastewater resource utilization and compliant discharge.

[0003] DT membrane filtration selects a permeate membrane with an appropriate pore size based on the molecular weight of the target inorganic salt to separate impurities, accurately retain the target inorganic salt, and purify wastewater for resource utilization. Evaporator treatment utilizes the physical property of liquid evaporation upon heating to achieve a phase change between liquid and gas, separating different components in wastewater, evaporating excess water, and retaining valuable solutes. Current technologies, especially single-system operation, fall far short of the standard for treating high-concentration saline wastewater to full reuse. Furthermore, some membrane combinations are unscientific, resulting in substandard color of the salt separation product water and insufficient purity of crystalline sodium chloride, making complete reuse impossible. Therefore, to ensure that crystalline sodium chloride meets the reuse requirements of the production line and achieves green and sustainable treatment of antibiotic wastewater, it is necessary to develop a treatment device specifically for high-salt antibiotic wastewater. Utility Model Content

[0004] To address the shortcomings of the existing technology, this invention provides a high-salt antibiotic wastewater treatment device that can efficiently separate salts from wastewater and extract sodium chloride of industrial reuse standard purity from the separated inorganic salt solution. The sodium chloride is then refined and reused in the antibiotic production line, thereby achieving wastewater recycling and reducing emissions and environmental pollution.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0006] A high-salt antibiotic wastewater treatment device includes a DT membrane filtration component, a forced crystallization component, and a crystallization salt separation and drying component connected in sequence. The DT membrane filtration component is used for filtration and separation of wastewater, the forced crystallization component is used for concentration and crystallization of wastewater, and the crystallization salt separation and drying component is used for separation and drying of crystallization salt. The salt outlet pipeline of the crystallization salt separation and drying component is connected to a crystallization salt buffer device.

[0007] As a preferred technical solution, the DT membrane filtration assembly includes a high-density softening tank for salt separation, a primary nanofiltration membrane group, a primary nanofiltration membrane permeate tank, a secondary reverse osmosis membrane group, a secondary reverse osmosis membrane concentrate tank, and a decolorization and purification membrane group connected in sequence, with the decolorization and purification membrane group connected to a forced crystallization assembly.

[0008] As a preferred technical solution, the forced crystallization assembly includes a sodium chloride pre-distillation liquid storage tank, a forced crystallization evaporator, and a salt discharge buffer tank connected in sequence. The sodium chloride pre-distillation liquid storage tank is connected to the discharge port of the decolorization and purification membrane assembly. The forced crystallization evaporator is connected to the discharge pipeline of the sodium chloride pre-distillation liquid storage tank. The salt discharge buffer tank is connected to the salt discharge port of the forced crystallization evaporator. The salt discharge pipeline of the salt discharge buffer tank and the mother liquor reflux pipeline of the forced crystallization evaporator are connected to the crystallization salt separation and drying assembly.

[0009] As a preferred technical solution, the crystallized salt separation and drying assembly includes a belt filter and a drying device connected in sequence. The inlet end of the belt filter is connected to the salt outlet pipeline of the salt discharge buffer tank and the mother liquor return pipeline of the forced crystallization evaporator. The salt outlet of the belt filter is connected to the drying device. The salt outlet pipeline of the drying device is connected to the crystallized salt buffer device.

[0010] As a preferred technical solution, a vacuum pump is also included, which is connected to the exhaust pipeline of the salt discharge buffer tank, the belt filter device, and the drying device.

[0011] As a preferred technical solution, the primary nanofiltration membrane module is a DTNF membrane filtration device.

[0012] As a preferred technical solution, the secondary reverse osmosis membrane module is a DTRO membrane filtration device.

[0013] As a preferred technical solution, the decolorization and purification membrane assembly is a spiral wound NF permeation membrane filtration device.

[0014] As a preferred technical solution, the forced crystallization evaporator is a 25t tubular forced crystallization evaporator.

[0015] As a preferred technical solution, the solid-liquid separation filter cloth of the belt filter device is 500-mesh polypropylene monofilament; the drying device is a disc continuous dryer.

[0016] The beneficial effects of this utility model are:

[0017] This utility model of high-salt antibiotic wastewater treatment device adopts a synergistic combination process of DT membrane filtration module, forced crystallization module, and crystallized salt separation and drying module. It can continuously, efficiently, and rapidly separate and purify sodium chloride in antibiotic wastewater. It has strong operability and controllability, high recovery rate, and can obtain sodium chloride that meets the standards for reuse in antibiotic production lines. It meets the needs of production reuse, saves energy and is environmentally friendly, and reduces operating costs.

[0018] This invention relates to a high-salt antibiotic wastewater treatment device. The high-salt antibiotic wastewater undergoes filtration and separation via a DT membrane filter assembly, concentration and crystallization via a forced crystallization assembly, physical filtration, and drying. Because the DT membrane filter assembly removes some solid impurities and organic solutes, and the color is reduced before evaporation and crystallization, sodium chloride salt that meets industrial reuse quality requirements is obtained. This reduces pollution from wastewater discharge and reprocessing costs, achieving green and clean production. The permeate from the secondary reverse osmosis membrane unit has low COD (Chemical Oxygen Demand), TDS (Total Dissolved Solids), and SS (Suspended Solids Concentration), allowing it to be directly returned to the clear water tank, improving the system's water recovery rate and reducing the use of fresh water. The forced crystallization evaporator concentrates and separates the concentrated brine produced by the DT membrane filter assembly to obtain high-purity sodium chloride. The mother liquor is returned to the system for multiple concentrations, reducing wastewater discharge.

[0019] After being treated by this invention, most of the inorganic salts in the wastewater are separated and refined to obtain fully reusable sodium chloride. This enables the high-salt wastewater to be efficiently treated, achieving the goal of wastewater resource utilization and compliant discharge. It is an important means of protecting the environment and promoting sustainable development. Through scientific and efficient water treatment technology, a win-win situation of economic and environmental benefits can be achieved. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the present invention.

[0022] Figure labels: 1-High-density softening tank for salt separation, 2-First-stage nanofiltration membrane group, 3-First-stage nanofiltration membrane permeate tank, 4-Second-stage reverse osmosis membrane group, 5-Second-stage reverse osmosis membrane concentrate tank, 6-Decolorization and purification membrane group, 7-Sodium chloride salt pre-evaporation liquid storage tank, 8-Forced crystallization evaporator, 9-Salt discharge buffer tank, 10-Belt filter device, 11-Drying device, 12-Vacuum pump, 13-Crystallization salt buffer device. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0024] A high-salt antibiotic wastewater treatment device includes a DT membrane filtration component, a forced crystallization component, and a crystallization salt separation and drying component connected in sequence. The DT membrane filtration component is used for filtration and separation of wastewater, the forced crystallization component is used for concentration and crystallization of wastewater, and the crystallization salt separation and drying component is used for separation and drying of crystallization salt. The salt outlet pipeline of the crystallization salt separation and drying component is connected to a crystallization salt buffer device.

[0025] The DT membrane filtration assembly includes a high-density softening tank 1, a primary nanofiltration membrane group 2, a primary nanofiltration membrane permeate tank 3, a secondary reverse osmosis membrane group 4, a secondary reverse osmosis membrane concentrate tank 5, and a decolorization and purification membrane group 6 connected in sequence. The decolorization and purification membrane group 6 is connected to a forced crystallization assembly.

[0026] The forced crystallization assembly includes a sodium chloride pre-distillation liquid storage tank 7, a forced crystallization evaporator 8, and a salt discharge buffer tank 9 connected in sequence. The sodium chloride pre-distillation liquid storage tank 7 is connected to the discharge port of the decolorization and purification membrane group 6. The forced crystallization evaporator 8 is connected to the discharge pipeline of the sodium chloride pre-distillation liquid storage tank 7. The salt discharge buffer tank 9 is connected to the salt discharge port of the forced crystallization evaporator 8. The salt discharge pipeline of the salt discharge buffer tank 9 and the mother liquor reflux pipeline of the forced crystallization evaporator 8 are connected to the crystallization salt separation and drying assembly.

[0027] The crystallized salt separation and drying assembly includes a belt filter device 10 and a drying device 11 connected in sequence. The inlet end of the belt filter device 10 is connected to the salt outlet pipeline of the salt discharge buffer tank 9 and the mother liquor return pipeline of the forced crystallization evaporator 8. The crystallized salt and the mother liquor enter the belt filter device 10 together. The salt outlet of the belt filter device 10 is connected to the drying device 11. The crystallized salt enters the drying device 11, and the drying device 11 produces sodium chloride salt that meets the quality requirements for industrial reuse. The salt outlet pipeline of the drying device 11 is connected to the crystallized salt buffer device 13.

[0028] It also includes a vacuum pump 12, which is connected to the exhaust pipes of the salt discharge buffer tank 9, the belt filter device 10, and the drying device 11, and the exhaust gas enters the vacuum pump 12.

[0029] The primary nanofiltration membrane module 2 is a DTNF (disc tube nanofiltration) membrane filtration device; the secondary reverse osmosis membrane module 4 is a DTRO (disc tube reverse osmosis) membrane filtration device; the decolorization and purification membrane module 6 is a spiral wound NF osmosis membrane filtration device; the forced crystallization evaporator 8 is a 25t tubular forced crystallization evaporator (titanium material); the solid-liquid separation filter cloth of the belt filter device 10 is 500 mesh polypropylene monofilament; and the drying device 11 is a disc continuous dryer.

[0030] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A device for treating high-salt antibiotic wastewater, characterized in that: It includes a DT membrane filtration unit, a forced crystallization unit, and a crystallized salt separation and drying unit connected in sequence. The DT membrane filtration unit is used for the filtration and separation of wastewater, the forced crystallization unit is used for the concentration and crystallization of wastewater, and the crystallized salt separation and drying unit is used for the separation and drying of crystallized salt. The salt outlet pipeline of the crystallized salt separation and drying unit is connected to a crystallized salt buffer device.

2. The high-salt antibiotic wastewater treatment device according to claim 1, characterized in that: The DT membrane filtration assembly includes a high-density softening tank (1), a primary nanofiltration membrane group (2), a primary nanofiltration membrane permeate tank (3), a secondary reverse osmosis membrane group (4), a secondary reverse osmosis membrane concentrate tank (5), and a decolorization and purification membrane group (6) connected in sequence. The decolorization and purification membrane group (6) is connected to a forced crystallization assembly.

3. The high-salt antibiotic wastewater treatment device according to claim 2, characterized in that: The forced crystallization assembly includes a sodium chloride pre-distillation liquid storage tank (7), a forced crystallization evaporator (8), and a salt discharge buffer tank (9) connected in sequence. The sodium chloride pre-distillation liquid storage tank (7) is connected to the discharge port of the decolorization and purification membrane group (6). The forced crystallization evaporator (8) is connected to the discharge pipeline of the sodium chloride pre-distillation liquid storage tank (7). The salt discharge buffer tank (9) is connected to the salt discharge port of the forced crystallization evaporator (8). The salt discharge pipeline of the salt discharge buffer tank (9) and the mother liquor reflux pipeline of the forced crystallization evaporator (8) are connected to the crystallization salt separation and drying assembly.

4. The high-salt antibiotic wastewater treatment device according to claim 3, characterized in that: The crystallized salt separation and drying assembly includes a belt filter (10) and a drying device (11) connected in sequence. The inlet end of the belt filter (10) is connected to the salt outlet pipeline of the salt discharge buffer tank (9) and the mother liquor return pipeline of the forced crystallization evaporator (8). The salt outlet of the belt filter (10) is connected to the drying device (11). The salt outlet pipeline of the drying device (11) is connected to the crystallized salt buffer device.

5. The high-salt antibiotic wastewater treatment device according to claim 4, characterized in that: It also includes a vacuum pump (12), which is connected to the exhaust line of the salt discharge buffer tank (9), the belt filter device (10), and the drying device (11).

6. The high-salt antibiotic wastewater treatment device according to claim 2, characterized in that: The primary nanofiltration membrane module (2) is a DTNF membrane filtration device.

7. The high-salt antibiotic wastewater treatment device according to claim 2, characterized in that: The secondary reverse osmosis membrane module (4) is a DTRO membrane filtration device.

8. The high-salt antibiotic wastewater treatment device according to claim 2, characterized in that: The decolorization and purification membrane assembly (6) is a spiral wound NF permeation membrane filtration device.

9. The high-salt antibiotic wastewater treatment device according to claim 3, characterized in that: The forced crystallization evaporator (8) is a 25t tubular forced crystallization evaporator.

10. The high-salt antibiotic wastewater treatment device according to claim 4, characterized in that: The solid-liquid separation filter cloth of the belt filter device (10) is 500 mesh polypropylene monofilament, and the drying device (11) is a disc continuous dryer.

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