A device for advanced treatment of pharmaceutical wastewater
By setting up a catalyst bed and baffle plate inside the ozone catalytic oxidation tower, combined with a temperature control jacket and temperature probe, the problems of low ozone utilization and inconvenient operation and maintenance are solved, achieving efficient mineralization degradation and stable operation of pharmaceutical wastewater, and reducing treatment costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGXIA QIYUAN PHARMA
- Filing Date
- 2026-05-29
- Publication Date
- 2026-07-21
AI Technical Summary
Existing technologies for treating pharmaceutical wastewater suffer from problems such as low ozone utilization, insufficient oxidation efficiency, difficulty in precisely controlling reaction temperature, and inconvenience in operation and maintenance, resulting in high treatment costs and environmental risks.
An ozone catalytic oxidation tower is used, which is equipped with a catalyst bed and a baffle plate. Combined with a temperature control jacket and a temperature probe, it forms a continuous baffle channel to enhance gas-liquid mass transfer. The catalyst is mixed with quartz balls to optimize the flow field distribution. Convenient operation and maintenance are achieved through a backwash inlet and a sight glass sampling port.
It improves ozone utilization, reduces treatment costs, ensures stable oxidation reaction efficiency, achieves efficient mineralization and degradation of wastewater, avoids secondary pollution, and the device can operate continuously and stably.
Smart Images
Figure CN224530725U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pharmaceutical wastewater treatment technology, and in particular to a deep treatment device for pharmaceutical wastewater. Background Technology
[0002] The fermentation process for pharmaceutical manufacturing generates a large amount of wastewater containing high concentrations of organic matter with antibiotics. Its COD content is around 10,000 mg / L. After flocculation and biochemical treatment, the COD can be reduced to around 800 mg / L, and its color is dark, which does not yet meet the discharge standards.
[0003] Pharmaceutical wastewater, after biochemical treatment, has high salt content, is difficult to degrade, has high organic content, and has a complex composition, making it extremely difficult to treat.
[0004] Therefore, pharmaceutical wastewater after biochemical treatment must undergo advanced treatment to meet discharge standards. Advanced treatment methods include advanced oxidation, activated carbon, and / or resin adsorption. However, adsorption methods can generate large amounts of solid waste, causing secondary pollutants.
[0005] Advanced oxidation processes are highly efficient and have a high rate of organic matter mineralization. They have been widely used for the mineralization removal of toxic and biodegradable organic pollutants. However, they consume large quantities of Fenton / Fenton-like agents and perchlorate, resulting in high costs. While ozone catalytic oxidation has lower processing costs, it suffers from multiphase mass transfer limitations, low ozone utilization, and relatively low oxidation efficiency.
[0006] Therefore, there is an urgent need to invent a deep treatment device for antibiotic wastewater that has high ozone utilization, good gas-liquid mass transfer effect, low treatment cost, simple operation, and continuous operation. Utility Model Content
[0007] The main objective of this invention is to provide a deep treatment device for pharmaceutical wastewater, which can effectively solve the problems mentioned above.
[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0009] A pharmaceutical wastewater deep treatment device includes: a catalyst bed, a baffle sieve, and a baffle degassing layer;
[0010] The bottom air inlet of the ozone catalytic oxidation tower is connected to the ozone generator at one end and to the aeration disc at the other end. The bottom drain outlet is connected to the sewage outlet pipe. The top water inlet of the ozone catalytic oxidation tower is connected to the sewage inlet pipe at one end and to the water distributor at the other end.
[0011] The backwash inlet at the top of the ozone catalytic oxidation tower is connected to the drinking water pipeline, and the exhaust port at the top is first connected to the ozone detector, and then connected to the ozone destroyer and the circulating fan through valves respectively.
[0012] Preferably, the outer wall of the ozone catalytic oxidation tower has a jacket, the steam inlet at the top of the jacket is connected to a steam pipe, the drinking water outlet at the top is connected to a drainage pipe, the steam exhaust port at the bottom of the jacket is connected to an exhaust pipe, the drinking water inlet is connected to a drinking water pipe, and a temperature probe is installed in the middle of the tower body.
[0013] Preferably, a baffle degassing layer is provided below the top end cap of the ozone catalytic oxidation tower, and multiple sets of baffle screens are installed alternately between the water separator and the catalyst bed to form baffles.
[0014] Preferably, the catalyst bed is located in the middle and lower layers inside the ozone catalytic oxidation tower, and is equipped with 100-mesh stainless steel screens at both the top and bottom. The edges of the 100-mesh stainless steel screens are provided with sealing strips at the contact points with the inner side of the tower wall, and the corresponding tower wall has an inspection port for easy replacement of the catalyst. During the operation of the ozone catalytic oxidation tower, the inspection port is sealed with several lifting eye bolts and sealing strips. The catalyst bed is filled with a mixture of catalyst and quartz balls.
[0015] Preferably, the ozone catalytic oxidation tower is provided with three sight glasses and three sampling ports on the tower wall. The sight glasses are respectively located on the outer wall of the catalyst bed, the middle and the upper part of the multiple sets of baffle sieves, and the three sampling ports are distributed at the same height as the three sight glasses.
[0016] Compared with the prior art, the present invention has the following beneficial effects:
[0017] 1. This utility model forms a continuous baffle channel by staggering multiple sets of baffle sieves between the water separator and the catalyst bed, which prolongs the wastewater flow path and forcibly changes the flow direction of the gas and liquid phases, increases the degree of turbulence, breaks the gas-liquid mass transfer boundary layer, increases the gas-liquid mass transfer area and contact time, and enhances the ozone mass transfer and dissolution effect. Combined with the mixed packing design of catalyst and quartz balls in the catalyst bed, the flow field distribution in the tower is optimized to avoid flow deviation and channeling problems, further improving the ozone utilization rate. Moreover, the high concentration of ozone in the exhaust gas can be returned to the tower for reuse by the circulating fan, realizing the efficient mineralization and degradation of refractory organic matter and residual antibiotics in pharmaceutical wastewater.
[0018] 2. This utility model, through the combination of the temperature control jacket on the outer wall of the ozone catalytic oxidation tower and the temperature probe in the middle of the tower, can accurately control the reaction temperature inside the tower according to the working conditions, always keeping the reaction environment in the optimal range of ozone catalytic oxidation, ensuring stable oxidation reaction efficiency, eliminating the need for large amounts of chemical reagents, significantly reducing treatment costs and preventing secondary pollution.
[0019] 3. This utility model, by opening an inspection port on the tower wall corresponding to the catalyst bed and combining it with the backwashing inlet design, can quickly complete the unloading, replenishment and replacement of the catalyst, and can also perform backwashing maintenance on the structure inside the tower. At the same time, the sight glass and sampling port set on the tower wall can monitor the equipment operating status and wastewater treatment effect in real time, realize convenient operation and maintenance of the equipment and precise control of process parameters, and ensure that the device can operate continuously and stably. Attached Figure Description
[0020] Figure 1 The 10 of this utility model Schematic diagram of the overall structure of the ozone catalytic oxidation tower;
[0021] Figure 2 This is a schematic diagram of the upper part of the overall structure of this utility model;
[0022] Figure 3 For the present utility model Figure 1 Enlarged view of point A in the middle;
[0023] Figure 4 For the present utility model Figure 1 Enlarged diagram of point B in the middle.
[0024] In the diagram: 1. Aeration disc; 2. Catalyst bed; 3. 100-mesh stainless steel screen; 4. Baffle sieve plate; 5. Water distributor; 6. Baffle degassing layer; 7. Circulating fan; 8. Inspection port; 9. Temperature probe; 10. Ozone detector; 11. Sight glass; 12. Sampling port; 13. Backwash inlet; 14. Drinking water outlet; 15. Steam inlet; 16. Drinking water inlet; 17. Steam exhaust port. Detailed Implementation
[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0026] Ozone catalytic oxidation towers are the core equipment for the deep treatment of pharmaceutical wastewater. They are used to mineralize and degrade pharmaceutical wastewater with high salinity, poor degradation, and high organic content after biochemical treatment, so as to achieve stable discharge of wastewater that meets standards.
[0027] In the existing ozone catalytic oxidation treatment process for pharmaceutical wastewater, there are common problems such as multiphase mass transfer limitation, low ozone utilization rate, insufficient oxidation efficiency, inability to accurately control reaction temperature, and inconvenience of operation and maintenance. These problems not only make it difficult to achieve stable wastewater treatment results, but also increase operating costs and environmental safety risks.
[0028] This solution aims to address the aforementioned issues, and the specific implementation process is as follows:
[0029] Example 1, as Figure 1 - Figure 4 As shown, a pharmaceutical wastewater deep treatment device is presented. The core component of this solution is an ozone catalytic oxidation tower. During implementation, staff must first complete the standardized connections of all pipelines and supporting equipment within the tower, as detailed below:
[0030] One end of the bottom air inlet of the ozone catalytic oxidation tower is connected to the ozone generator via a flange seal, and the other end is connected to the aeration disc 1 at the bottom of the tower, which is used to evenly diffuse ozone gas into the tower. The bottom drain outlet of the tower is connected to the sewage outlet pipe via a flange seal, which is used to discharge the treated wastewater that meets the standards.
[0031] One end of the upper inlet of the ozone catalytic oxidation tower is connected to the sewage inlet pipe via a flange seal, and the other end is connected to the water distributor 5 at the top of the tower, which is used to evenly distribute the pharmaceutical wastewater to be treated into the tower; the backwash inlet 13 at the top of the tower is connected to the drinking water pipe via a flange seal, which is used for backwashing and maintenance of the core components inside the tower.
[0032] The exhaust port at the top of the ozone catalytic oxidation tower is first sealed to the ozone detector 10 through a pipeline, and then connected to the ozone destroyer and the circulating fan 7 respectively through control valves, for real-time detection and classification of ozone concentration in the exhaust gas for harmless treatment.
[0033] The outer wall of the ozone catalytic oxidation tower is equipped with a temperature-controlled interlayer. The steam inlet 15 at the top of the interlayer is connected to a steam pipe, and the drinking water outlet 14 at the top is connected to a drainage pipe. The steam exhaust port 17 at the bottom of the interlayer is connected to an exhaust pipe, and the drinking water inlet 16 is connected to a drinking water pipe. A temperature probe 9 is installed in the middle of the tower body to monitor the temperature of the core reaction area inside the tower in real time.
[0034] Below the top end cap of the ozone catalytic oxidation tower, there is a baffle degassing layer 6. Multiple sets of baffle screens 4 are installed alternately between the water separator 5 and the catalyst bed 2 to form a continuous baffle flow channel structure. The catalyst bed 2 is located in the middle and lower layers inside the ozone catalytic oxidation tower. It is equipped with 100-mesh stainless steel screens 3 on both the top and bottom. The edges of the 100-mesh stainless steel screens 3 are equipped with sealing strips at the contact points with the inner side of the tower wall. The corresponding tower wall has maintenance ports 8 for easy replacement of the catalyst. During the operation of the ozone catalytic oxidation tower, the maintenance ports 8 are sealed and fixed by several lifting eye bolts and sealing strips.
[0035] The ozone catalytic oxidation tower is provided with three sight glasses 11 and three sampling ports 12 on the tower wall. The sight glasses 11 are respectively located on the outer wall of the catalyst bed 2, the middle and the upper part of the multiple sets of baffle sieve plates 4, and the three sampling ports 12 are distributed at the same height as the three sight glasses 11.
[0036] Specifically, after the pipeline and supporting equipment are connected, the drain valve at the bottom of the tower is closed, the exhaust valve at the top is opened, and the sewage inlet pipe and ozone preparation system are opened simultaneously. The pharmaceutical wastewater to be treated enters the water distributor 5 through the upper inlet, and after being evenly distributed by the water distributor 5, it flows from top to bottom along the tower. The ozone gas enters the aeration disc 1 through the bottom air inlet, and after being evenly aerated by the aeration disc 1, it flows from bottom to top along the tower. The gas and liquid phases form countercurrent contact in the tower, providing the basic conditions for the oxidation reaction.
[0037] As the wastewater flows from top to bottom, it first passes through the baffle channel formed by multiple sets of staggered baffle sieves 4, which extends the flow path of the wastewater. At the same time, ozone must pass through the mesh of the baffle sieve 4 from bottom to top to flow upward, increasing the mass transfer area and contact time of the gas and liquid phases and enhancing the ozone mass transfer and dissolution effect.
[0038] Subsequently, the wastewater enters catalyst bed 2. Under the catalytic action of the catalyst, ozone rapidly decomposes to generate strong oxidizing hydroxyl radicals, which deeply mineralize and degrade the recalcitrant organic pollutants and residual antibiotics in the wastewater, thus achieving deep treatment of pharmaceutical wastewater.
[0039] During the process, temperature probe 9 in the middle of the tower monitors the reaction temperature inside the tower in real time. The temperature inside the tower can be controlled by the temperature control jacket on the outer wall according to the ambient temperature and reaction conditions.
[0040] When it is necessary to raise the temperature of the reaction system in winter, open the valve of the steam inlet 15 at the top of the jacket to introduce steam into the jacket and raise the temperature inside the tower to the optimal reaction range for ozone catalytic oxidation.
[0041] When the reaction system needs to be cooled in summer, open the valve of drinking water inlet 16 at the bottom of the jacket and introduce drinking water into the jacket to lower the temperature inside the tower to the optimal reaction range, ensuring stable oxidation reaction efficiency throughout the process.
[0042] In the above-mentioned configuration, the ozone detector 10 at the top of the tower monitors the ozone concentration in the exhaust gas in real time and classifies and treats the exhaust gas according to the detection results.
[0043] When the ozone concentration is ≥50mg / L, open the valve at the front end of the circulating fan 7 to send the ozone in the exhaust gas back to the bottom air inlet of the tower through the circulating fan 7, so as to realize the recycling of ozone and greatly improve the ozone utilization rate.
[0044] When the ozone concentration is <50mg / L, open the valve at the front end of the ozone destructor to allow the exhaust gas to pass through the ozone destructor for degradation treatment, thereby avoiding direct ozone emission and environmental pollution and ensuring the safety of the operating environment.
[0045] After the deep treatment is completed, the qualified wastewater is discharged through the drain outlet at the bottom of the tower, completing the entire pharmaceutical wastewater deep treatment process. When the components inside the tower need maintenance and cleaning, high-pressure drinking water can be introduced through the backwash inlet 13 to backwash the core components such as the baffle plate 4 and catalyst bed 2 inside the tower, so as to avoid impurities clogging the flow channels and screens.
[0046] When the catalyst needs to be replaced, the inspection port 8 can be opened after the equipment is shut down to quickly unload, replenish and replace the catalyst, making the operation and maintenance convenient and efficient.
[0047] This embodiment, based on Embodiment 1, provides a further detailed explanation of the ozone catalytic oxidation tower, as detailed below: Embodiment 2:
[0048] The catalyst bed 2 is filled with a uniform mixture of catalyst and quartz balls. The quartz balls have excellent chemical stability and can withstand long-term corrosion from ozone and acid and alkali media. At the same time, they have a moderate specific surface area and uniform pore distribution, which can further extend the contact time between the gas and liquid phases. They also have low flow resistance during operation, which can reduce the operating energy consumption of the equipment's fan. In addition, they are environmentally friendly, non-toxic, and easy to regenerate and reuse.
[0049] When mixed with catalyst, it can provide sufficient reaction sites for catalytic oxidation reaction and optimize the flow field distribution in the tower, avoiding problems such as flow deviation and channeling, and further improving ozone utilization and degradation efficiency of organic pollutants.
[0050] The 100-mesh stainless steel screens 3 installed on the top and bottom of the catalyst bed 2 can effectively intercept the catalyst and quartz ball packing, preventing the packing from being lost during operation. Together with the sealing strips on the edge of the screen, it can prevent wastewater from flowing out directly without being treated by the catalyst bed 2, ensuring stable wastewater treatment effect.
[0051] The baffle sieve plate 4 is installed in multiple sets of staggered vertically, fixed between the water distributor 5 and the catalyst bed 2, forming a continuous baffle flow channel. This not only enables uniform distribution of wastewater across the entire cross-section of the tower, avoiding dead zones, but also forces a change in the flow direction of the gas and liquid phases, increasing the turbulence of the gas and liquid phases, breaking the gas-liquid mass transfer boundary layer, solving the multiphase mass transfer limitation problem existing in traditional ozone catalytic oxidation towers, enhancing the gas-liquid mass transfer effect, and improving the ozone dissolution efficiency and utilization efficiency.
[0052] The baffle degassing layer 6 is fixedly installed below the top end cap of the tower body, which can efficiently separate the treated wastewater and rising tail gas, prevent the tail gas from carrying a large number of liquid droplets into the subsequent pipelines and detection equipment, and intercept and recover large liquid droplets in the tail gas, reduce wastewater loss, and ensure the long-term stable operation of the subsequent ozone detection equipment and tail gas treatment equipment.
[0053] The sight glass 11 and sampling port 12 installed on the tower wall correspond to three key treatment nodes: catalyst bed 2, the middle of baffle sieve plate 4, and the upper part of baffle sieve plate 4, respectively. Staff can observe the packing status, gas-liquid contact and internal operating status of the corresponding position in real time through the sight glass 11. At the same time, water samples at different treatment stages can be quickly obtained through the sampling port 12 at the same height to detect key water quality indicators such as COD and color, accurately grasp the wastewater treatment effect, and adjust operating parameters such as influent flow rate, ozone dosage and reaction temperature in a timely manner.
[0054] It should be noted that the specific installation methods, circuit connection methods, and automatic control methods of the electrical equipment such as ozone generator, circulating fan, ozone detector, ozone destroyer, and temperature probe used in this utility model are all conventional designs in this field, and will not be described in detail here.
[0055] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A device for deep treatment of pharmaceutical wastewater, characterized in that, include: Catalyst bed (2), baffle sieve (4) and baffle degassing layer (6); One end of the bottom air inlet of the ozone catalytic oxidation tower is connected to the ozone generator, and the other end is connected to the aeration plate (1). The bottom drain is connected to the sewage outlet pipe. One end of the upper water inlet of the ozone catalytic oxidation tower is connected to the sewage inlet pipe, and the other end is connected to the water distributor (5). The backwash inlet (13) at the top of the ozone catalytic oxidation tower is connected to the drinking water pipeline, and the top exhaust port is first connected to the ozone detector (10), and then connected to the ozone destroyer and the circulating fan (7) through valves respectively.
2. The pharmaceutical wastewater deep treatment device according to claim 1, characterized in that: The outer wall of the ozone catalytic oxidation tower has a jacket. The steam inlet (15) at the top of the jacket is connected to the steam pipe, the drinking water outlet (14) at the top is connected to the drainage pipe, the steam exhaust port (17) at the bottom of the jacket is connected to the exhaust pipe, the drinking water inlet (16) is connected to the drinking water pipe, and a temperature probe (9) is installed in the middle of the tower body.
3. The pharmaceutical wastewater deep treatment device according to claim 1, characterized in that: The ozone catalytic oxidation tower is provided with a baffle degassing layer (6) below the top end cap. Multiple sets of baffle screens (4) are installed alternately between the water separator (5) and the catalyst bed (2) to form baffles.
4. The pharmaceutical wastewater deep treatment device according to claim 1, characterized in that: The catalyst bed (2) is located in the middle and lower layers inside the ozone catalytic oxidation tower. Both the top and bottom are equipped with 100-mesh stainless steel screens (3). The edges of the 100-mesh stainless steel screens (3) are provided with sealing strips at the contact points with the inner side of the tower wall. The corresponding tower wall has an inspection port (8) for easy replacement of the catalyst. During the operation of the ozone catalytic oxidation tower, the inspection port (8) is sealed with several lifting eye bolts and sealing strips. The catalyst bed (2) is filled with a mixture of catalyst and quartz balls.
5. The pharmaceutical wastewater deep treatment device according to claim 1, characterized in that: The ozone catalytic oxidation tower is provided with three sight glasses (11) and three sampling ports (12) on the tower wall. The sight glasses (11) are respectively located on the outer wall of the catalyst bed (2), the middle and the upper part of the multiple sets of baffle sieves (4), and the three sampling ports (12) are distributed at the same height as the three sight glasses (11).