Device for adsorbing hydrogen sulfide in oil removal tower wastewater and inhibiting bacteria based on activated carbon

Abstract

The utility model discloses a device for adsorbing hydrogen sulfide in waste water of an oil removal tower and inhibiting bacteria based on activated carbon, which is characterized in that micro-nano aeration equipment is communicated with an aeration tank, the aeration tank is used for aerating the waste water entering the activated carbon adsorption tower, and the aeration tank is communicated with the activated carbon adsorption tower; each layer in the activated carbon adsorption tower is filled with granular activated carbon and is internally provided with an infrared detection probe connected with the water quality automatic detection platform; the ozone aeration assembly is arranged at the bottom of the activated carbon adsorption tower layer and is communicated with the ozone generator; the top of the activated carbon adsorption tower communicates with a pressure balance tank; the wastewater entering the activated carbon adsorption tower from the aeration tank is aerated, the water quality automatic detection platform monitors the aeration time and concentration of the ozone aeration assembly in real time, and the concentration of dissolved oxygen and oil pollutants in the wastewater is obtained. According to the device, micro-nano aeration is combined with ozone treatment, so that the generation of hydrogen sulfide in uranium ore extraction process wastewater treatment is efficiently controlled, the reproduction of sulfate reducing bacteria is inhibited, and the dual effects of bacteriostasis and oil removal are realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to uranium ore extraction process wastewater treatment and hydrogen sulfide control technical field, especially to a kind of based on activated carbon adsorption oil removal tower wastewater hydrogen sulfide generation control and bacteriostatic device. BACKGROUND

[0002] In industrial production, especially in the treatment of mineral extraction process wastewater in mining and chemical industry, the generation and emission of oil pollutants and hydrogen sulfide gas (H2S) are increasingly prominent. Oil pollutants enter the treatment system through process water circulation. Long-term accumulation can cause corrosion and pollution to equipment and materials in the mineral extraction process wastewater treatment system, reducing the operating efficiency of the treatment system and increasing the operation and maintenance cost. In addition, due to the introduction of microorganism-containing water and the existence of anaerobic environment after domestic wastewater treatment in the mineral extraction process wastewater treatment system, the gradually enriched sulfate-reducing bacteria (SRB) in the water reproduce in large quantities under anaerobic conditions, reducing sulfate (SO4 2- ) to sulfide (S 2- ), producing hydrogen sulfide gas. Hydrogen sulfide not only poses a threat to workers' health and the surrounding environment in the treatment system, but also causes equipment corrosion and shortens the service life of activated carbon. Especially in the activated carbon adsorption oil removal tower, the generation and accumulation of hydrogen sulfide can significantly affect the oil removal efficiency and adsorption performance of activated carbon.

[0003] In order to effectively control the amount of hydrogen sulfide generated and improve the operating efficiency of the activated carbon adsorption tower, an improved device based on micro-nano aeration, ozone oxidation and pressure balance is proposed. UTILITY MODEL CONTENT

[0004] To solve the above-mentioned defects existing in the prior art, the purpose of the utility model is to provide a kind of based on activated carbon adsorption oil removal tower wastewater hydrogen sulfide and bacteriostatic device, utilize the joint structure of front micro-nano aeration and rear ozone oxidation to realize the efficient control of hydrogen sulfide in uranium ore extraction process wastewater and the optimization of oil removal process, and prolong the service life of activated carbon. The device can be widely used in wastewater treatment with high sulfate content, inhibition of hydrogen sulfide gas and adsorption purification of wastewater, and has environmental protection and economic benefits, helping the dual development of environmental governance and resource conservation.

[0005] The utility model is realized by the following technical solutions.

[0006] The utility model provides a kind of based on activated carbon adsorption oil removal tower wastewater hydrogen sulfide and bacteriostatic device, including micro-nano aeration equipment, aeration tank, activated carbon adsorption tower, ozone generator, pressure balance tank and water quality automatic detection platform;

[0007] The micro-nano aeration equipment is communicated with the aeration tank, the aeration tank is communicated with the activated carbon adsorption tower, the activated carbon adsorption tower is internally divided into multiple layers, each layer is filled with granular activated carbon and internally provided with an infrared detection probe; and the infrared detection probe is connected with a water quality automatic detection platform.

[0008] The ozone aeration assembly is arranged at the bottom of the activated carbon adsorption tower layer and communicated with an ozone generator.

[0009] The activated carbon adsorption tower is communicated with a pressure balance tank at the top.

[0010] The water quality automatic detection platform monitors the aeration time and concentration of the ozone aeration assembly in real time, and obtains the dissolved oxygen and oil pollutant concentration of the wastewater by aeration of the wastewater in the activated carbon adsorption tower from the self-aeration tank.

[0011] Preferably, the aeration tank is communicated with a process water inlet pipe.

[0012] Preferably, the micro-nano aeration equipment is communicated with the bottom of the aeration tank.

[0013] Preferably, the aeration tank is communicated with the top of the activated carbon adsorption tower through a hydraulic lifting system.

[0014] Preferably, the ozone aeration assembly is arranged at the bottom of the upper layer and the middle layer of the activated carbon adsorption tower.

[0015] Preferably, the sidewall of the activated carbon adsorption tower is provided with a pipe opening for communicating the ozone generator and the ozone aeration assembly, and a pipe opening for communicating the infrared detection probe and the water quality automatic detection platform.

[0016] Preferably, the activated carbon adsorption tower is provided with an activated carbon feeding opening at the top and an activated carbon outlet and a drainage opening at the bottom.

[0017] Preferably, the activated carbon adsorption tower, the ozone generator and the pressure balance tank are provided with a pressure detection table at the top.

[0018] The above technical scheme has the following beneficial effects:

[0019] The hydrogen sulfide control and bacterium inhibition device provided by the utility model, after the mineral extraction process wastewater in the aeration tank is treated by the micro-nano aeration system, the dissolved oxygen concentration is obviously improved, and the wastewater enters the activated carbon adsorption tower for oil removal and hydrogen sulfide inhibition. Meanwhile, the ozone oxidation is carried out in the activated carbon adsorption tower by the ozone aeration assembly, the ozone can be quantitatively added, the residual organic matter is effectively removed, and the growth and reproduction of sulfate-reducing bacteria are inhibited. Further, the ozone oxidation is carried out in the activated carbon adsorption tower by the ozone aeration assembly, the oil pollutants in the mineral extraction process wastewater are decomposed, the bacteria are killed, and the generation of hydrogen sulfide is inhibited. By the oxidation effect of the ozone, the refractory organic pollutants are removed, the deep purification of the activated carbon adsorption is combined, and the mineral extraction process wastewater treatment effect with high efficiency and low energy consumption is realized.

[0020] The device can effectively inhibit the generation of hydrogen sulfide in the low-dissolved-oxygen mineral extraction process wastewater environment, prolong the service life of activated carbon, has the advantages of simple operation and remarkable economic benefits, is suitable for technical fields such as mineral extraction process wastewater treatment, pollution control and resource recycling, and has a wide application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings described herein are used to provide further understanding of the utility model and form part of the present application, and do not constitute improper limitation on the utility model, and in the drawings:

[0022] Figure 1 It is a device structure schematic view based on the hydrogen sulfide control and bacterium inhibition device in the activated carbon adsorption oil removal tower of the utility model embodiment.

[0023] Mark explanation: 1-process water inlet pipe, 2-micro-nano aeration equipment, 3-aeration tank, 4-micro-nano aeration assembly, 5-hydraulic lifting system, 6-pressure detection table, 7-pressure holding and pressure relief valve, 8-activated carbon adding port, 9-pipe opening, 10-activated carbon outlet, 11-drainage port, 12-particulate activated carbon, 13-ozone aeration assembly, 14-infrared detection probe, 15-ozone generator, 16-pressure balance tank, 17-water quality automatic detection platform, 18-activated carbon adsorption tower. DETAILED DESCRIPTION

[0024] The utility model will be described in detail in combination with the drawings and specific embodiments, and the schematic embodiments and the description of the utility model are used to explain the utility model, but not as the limitation on the utility model.

[0025] As Figure 1As shown, the utility model provides a kind of based on active carbon adsorption hydrogen sulfide in oil tower wastewater and bacteriostatic device, comprising: micro-nano aeration equipment 2, aeration tank 3, hydraulic lifting system 5, activated carbon adsorption tower 18, ozone generator 15, pressure balance tank 16 water quality automatic detection platform 17.Micro-nano aeration equipment 2 is communicated with the bottom of aeration tank 3, and aeration tank 3 is communicated with activated carbon adsorption tower 18 by hydraulic lifting system 5, and the top of activated carbon adsorption tower 18 is communicated with pressure balance tank 16 by pipeline, and pressure relief valve 7 is equipped on pipeline;Activated carbon adsorption tower 18 side wall is communicated with ozone generator 15 by pipeline, and water quality automatic detection platform 17 is electrically connected by pipeline.Activated carbon adsorption tower 18, ozone generator 15 and pressure balance tank 16 top are equipped with pressure detector 6.Activated carbon adsorption tower 18 is divided into multiple layers inside, and each layer is filled with granular activated carbon 12, and infrared detection probe 14 electrically connected to water quality automatic detection platform 17 is placed in granular activated carbon 12 layer.

[0026] Two pipe mouths 9 are equipped on activated carbon adsorption tower 18 side wall of each layer, and are used to communicate infrared detection probe 14 ozone generator 15 respectively and as ozone inlet;Pipe mouth 9 can also be used as water quality inspection port;Among them, the bottom of upper layer and middle layer activated carbon adsorption tower 18 is equipped with ozone aeration assembly 13, and is communicated with ozone generator 15.

[0027] Activated carbon dosing port 8 is equipped on the top of activated carbon adsorption tower 18, and activated carbon outlet 10 and drain port 11 are equipped on the bottom.

[0028] The hydrogen sulfide control and bacteriostatic mechanism of the device is as follows:

[0029] Mineral extraction process wastewater first enters aeration tank 3 through process water inlet pipe 1, and is aerated using micro-nano aeration assembly 4 to improve the dissolved oxygen of water body.The gas source is provided by micro-nano aeration equipment 2.Process water rich in dissolved oxygen is sent to activated carbon adsorption tower 18 by hydraulic lifting system 5, which can form a good aerobic environment to inhibit the reproduction of sulfate-reducing bacteria (SRB) and reduce the conditions for hydrogen sulfide generation, but due to the high oil content and limited electron acceptor, the dissolved oxygen consumption rate is fast, resulting in a local anaerobic environment in the lower section of activated carbon adsorption tower.The back-end ozone process not only effectively solves this problem, but also uses advanced oxidation technology to oxidize and break down oil pollutants, which is more conducive to activated carbon adsorption.

[0030] The mineral extraction process wastewater flows into the activated carbon adsorption oil removal tower under the condition of high dissolved oxygen environment of micro-nano aeration, and the oil pollutants are removed through the adsorption of the granular activated carbon 12. The activated carbon adsorption tower is filled with granular activated carbon, and the activated carbon feeding port is used to supplement or replace the activated carbon. After the granular activated carbon in the activated carbon adsorption tower adsorbs the oil pollutants and metal ions and other substances in the process water, the oil content in the process water is reduced to less than 10 mg / L after adsorption treatment, and the process water is discharged from the drainage port. When the adsorption effect decreases or the treatment reaches a certain amount of water, the granular activated carbon is saturated and needs to be discharged from the activated carbon adsorption tower drainage port and replaced at the activated carbon feeding port.

[0031] In order to further inhibit the generation of hydrogen sulfide, the device is equipped with an ozone aeration assembly 13 and provides a mixed gas of ozone and oxygen through an ozone generator 15, and the ozone concentration is 5% to 20%, which is used to improve the dissolved oxygen concentration of the water body and directly oxidize the organic pollutants in the water body. While improving the dissolved oxygen, the generation of hydrogen sulfide and the reproduction of sulfate reducing bacteria are inhibited. The pressure detection table 6 and the pressure holding and pressure relief valve 7 ensure the pressure balance in the system to maintain the continuous flow of the water body and the good gas-liquid contact efficiency. Regular ozone oxidation aeration treatment not only directly inhibits the growth of SRB, but also oxidizes and decomposes the organic matter in the mineral extraction process wastewater, improves the water quality, and the infrared detection probe 14 is used for real-time monitoring of the dissolved oxygen and oil content in the water, ensuring that the system continuously operates in the best operating state and is used for real-time adjustment of the aeration intensity, time and concentration. After the treatment meets the standard, the water body is discharged from the activated carbon adsorption tower drainage port 11 to the plant water collection tank for recycling. The whole reactor realizes the whole process of maintaining high dissolved oxygen level through front-end micro-nano aeration, activated carbon adsorption and tower ozone oxidation, effectively inhibits the growth and reproduction of SRB, and reduces the corrosion of granular activated carbon, thereby improving the oil removal efficiency. Through the water quality automatic detection platform 17, the system can real-time monitor the dissolved oxygen, hydrogen sulfide and oil pollutant concentration in the mineral extraction process wastewater, and intelligently adjust the aeration and ozone injection to ensure the efficient and stable operation of the system.

[0032] The device combines micro-nano aeration and ozone treatment technology, by setting micro-nano aeration equipment and ozone aeration assembly in the process water inlet and activated carbon adsorption tower respectively, the dissolved oxygen concentration is improved by the micro-nano aeration assembly, the activity of SRB is inhibited under aerobic conditions, and the generation amount of hydrogen sulfide (H2S) is significantly reduced, so as to efficiently control the generation of hydrogen sulfide in the treatment of uranium ore extraction process wastewater, improve the dissolved oxygen concentration in water and inhibit the growth and reproduction of sulfate-reducing bacteria (SRB), and control the generation of hydrogen sulfide gas; at the same time, the ozone aeration assembly in the device can further decompose organic pollutants through advanced oxidation during gas-water mixing, inhibit the growth of harmful bacteria, and prolong the service life of activated carbon. Through the front-end aeration and the multi-layer ozone and oxygen supply system in the rear-end tower, the anaerobic area caused by low dissolved oxygen environment in the traditional activated carbon adsorption tower is effectively avoided, and long-term and stable hydrogen sulfide control effect is achieved. Ozone and activated carbon are combined to achieve deep removal of oil pollutants, achieving the dual effects of bacteriostasis and oil removal.

[0033] The pressure balance tank is used to adjust the pressure in the activated carbon adsorption oil removal tower. Since the water inlet in the tower is in the form of top-in and bottom-out, the pressure balance tank is used to maintain the continuity of the water inlet. The additional aeration equipment also affects the pressure in the tower, thereby affecting the continuity and stability of the process water. A pressure holding and pressure relief valve is provided between the pressure balance tank and the activated carbon adsorption tower. When the pressure in the pressure balance tank is too high, the pressure holding and pressure relief valve can be used to maintain the stability of the pressure.

[0034] The water quality automatic detection platform is connected to the preset infrared detection probe in the tower for dissolved oxygen detection and oil detection. By monitoring the dissolved oxygen, oil pollutants and hydrogen sulfide concentration in water in real time, and automatically adjusting the intensity, time and ozone concentration of micro-nano and ozone aeration according to the monitoring results, the best oil removal and bacteriostasis effect of the activated carbon adsorption tower can be ensured.

[0035] The device not only effectively controls hydrogen sulfide, reduces the replacement frequency of activated carbon and operation and maintenance cost, but also achieves the purpose of efficient oil removal. The device has the advantages of low energy consumption, high efficiency and simple operation, and can meet the needs of hydrogen sulfide control and oil pollutant removal under different water quality conditions, and is suitable for uranium and molybdenum ore extraction process wastewater treatment and related process production wastewater of mineral and precious metal extraction fields.

[0036] Embodiment:

[0037] A device for removing hydrogen sulfide and inhibiting bacteria in oil-removing tower wastewater based on activated carbon adsorption is simulated in a laboratory. Micro-nano aeration components increase the dissolved oxygen in water through micro-nano bubbles. The diameter of the aeration disc is 50 cm, and the diameter of the micro-nano bubbles is in the range of 50 nm to 500 nm, so as to increase the gas-liquid contact area and improve and maintain a high dissolved oxygen environment in the process water. The dissolved oxygen concentration is maintained at more than 6 mg / L. The process water in the aeration tank is sent to the activated carbon adsorption tower through a hydraulic lifting system. A high dissolved oxygen environment prevents the reproduction of sulfate-reducing bacteria (SRB) in the activated carbon adsorption tower. At the same time, ozone is regularly introduced through an ozone aeration component. The ozone concentration is 5% to 20%, which further kills the introduced microorganisms, inhibits the growth of SRB, oxidizes oil pollutants, and reduces the load of granular activated carbon. A pressure detection table and a pressure maintaining and pressure relief valve maintain the stability of the pressure in the tower to prevent pressure imbalance caused by gas accumulation.

[0038] The simulated mineral extraction process wastewater has an oil concentration of 80 mg / L to 100 mg / L and an initial hydrogen sulfide concentration of 10 ppm to 20 ppm. During the entire treatment process, the hydraulic retention time of the mineral extraction process wastewater in the activated carbon adsorption oil-removing tower is 2 hours. After treatment, the oil concentration of the effluent is reduced to less than 5 mg / L, and the hydrogen sulfide concentration is controlled to be less than 0.5 ppm.

[0039] During the activated carbon adsorption process, the dissolved oxygen and oil pollutant concentrations are monitored in real time through a water quality automatic detection platform, and the micro-nano aeration time and ozone aeration concentration are adjusted according to the monitoring results. The experimental results show that the oil removal rate of the device can be more than 90%, the hydrogen sulfide inhibition rate can be 95%, the growth of sulfate-reducing bacteria can be effectively inhibited, the bacteria inhibition efficiency can be more than 99%, and the service life of activated carbon can be prolonged.

[0040] In summary, the device for removing hydrogen sulfide and inhibiting bacteria in oil-removing tower wastewater based on activated carbon adsorption not only significantly reduces the generation of hydrogen sulfide, but also improves the oil removal effect and the running stability of the system, and is suitable for efficient treatment and pollution control of industrial mineral extraction process wastewater.

[0041] The utility model is not limited to the above-mentioned embodiments, and based on the technical solutions disclosed in the utility model, those skilled in the art can make some substitutions and deformations to some technical features according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the utility model.

Claims

1. A device for adsorbing hydrogen sulfide and inhibiting bacteria in wastewater from an activated carbon adsorption oil removal tower, characterized in that, It includes micro-nano aeration equipment (2), aeration tank (3), activated carbon adsorption tower (18), ozone generator (15), pressure balance tank (16) and automatic water quality detection platform (17); The micro-nano aeration device (2) is connected to the aeration tank (3), and the aeration tank (3) is connected to the activated carbon adsorption tower (18). The activated carbon adsorption tower (18) is divided into multiple layers, each layer is filled with granular activated carbon (12) and has an infrared detection probe (14) built in; the infrared detection probe (14) is connected to the automatic water quality detection platform (17). It also includes an ozone aeration assembly (13) installed at the bottom of the activated carbon adsorption tower (18) layer, and the ozone aeration assembly (13) is connected to the ozone generator (15). The top of the activated carbon adsorption tower (18) is connected to a pressure balancing tank (16); By aerating the wastewater entering the activated carbon adsorption tower (18) from the self-aeration tank (3), the water quality automatic detection platform (17) monitors the aeration time and concentration of the ozone aeration component (13) in real time to obtain the concentration of dissolved oxygen and oil pollutants in the wastewater.

2. The device for removing hydrogen sulfide and inhibiting bacteria in wastewater from an activated carbon adsorption oil removal tower according to claim 1, characterized in that, The aeration tank (3) is connected to the process water inlet pipe (1).

3. The device for removing hydrogen sulfide and inhibiting bacteria in wastewater from an activated carbon adsorption oil removal tower according to claim 1, characterized in that, The micro-nano aeration device (2) is connected to the bottom of the aeration tank (3).

4. The device for removing hydrogen sulfide and inhibiting bacteria in wastewater from an activated carbon adsorption oil removal tower according to claim 1, characterized in that, The aeration tank (3) is connected to the top of the activated carbon adsorption tower (18) via a hydraulic lifting system (5).

5. The device for removing hydrogen sulfide and inhibiting bacteria in wastewater from an activated carbon adsorption oil removal tower according to claim 1, characterized in that, The ozone aeration component (13) is located at the bottom of the upper and middle activated carbon adsorption tower (18).

6. The device for removing hydrogen sulfide and inhibiting bacteria in wastewater from an activated carbon adsorption oil removal tower according to claim 1, characterized in that, The activated carbon adsorption tower (18) has a port on its side wall for connecting the ozone generator (15) and the ozone aeration assembly (13), as well as a port for connecting the infrared detection probe (14) and the automatic water quality detection platform (17).

7. The device for removing hydrogen sulfide and inhibiting bacteria in wastewater from an activated carbon adsorption oil removal tower according to claim 1, characterized in that, The activated carbon adsorption tower (18) is equipped with an activated carbon inlet (8) at the top and an activated carbon outlet (10) and a drain outlet (11) at the bottom.

8. The device for removing hydrogen sulfide and inhibiting bacteria in wastewater from an activated carbon adsorption oil removal tower according to claim 1, characterized in that, Pressure gauges (6) are installed on the top of the activated carbon adsorption tower (18), the ozone generator (15), and the pressure balance tank (16).

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