CN110980927A - Black and odorous river regulation device and process based on bubble-free oxygenation technology - Google Patents
Black and odorous river regulation device and process based on bubble-free oxygenation technology Download PDFInfo
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Abstract
The invention relates to and provides a black and odorous river treatment device and a process based on a foamless oxygenation technology, wherein the device comprises integrated purification equipment and a high-efficiency liquid-phase oxygenation system which are connected with each other; the high-efficiency liquid-phase oxygenation system comprises a gas-water mixing tank, the top of the gas-water mixing tank is provided with a water inlet and an exhaust port, the side part of the gas-water mixing tank is provided with an oxygen inlet, the bottom of the gas-water mixing tank is provided with a high dissolved oxygen water discharge port, and the high dissolved oxygen water discharge port is connected with an aerobic pool; a ceramic membrane gas-liquid contactor is arranged in the gas-water mixing tank; and the air inlet of the ceramic membrane gas-liquid contactor is communicated with the oxygen inlet. The treatment process comprises the following steps: introducing the black and odorous river surge water into integrated purification equipment, and staying for 2-6 h; introducing the effluent and oxygen of the integrated purification equipment into a high-efficiency liquid-phase oxygenation system to prepare high-dissolved oxygen water with the concentration of 200-400 mg/L; and releasing the high dissolved oxygen water into the black and odorous river through a pipeline water distributor.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a black and odorous river surge treatment device and process based on a foamless oxygenation technology.
Background
The black and odorous river is mainly caused by the oxygen deficiency of water and the putrefaction of organic matters. When a large amount of organic pollutants enter a water body, a large amount of oxygen in the water body is consumed under the biochemical action of aerobic microorganisms, and the related research results of national heavy water special show that when dissolved oxygen is reduced to 2.0mg/L, the water body is in an anoxic state, anaerobic bacteria propagate in a large amount under the anoxic and anaerobic conditions, organic matters are putrefactive and decomposed, and malodorous substances such as ammonia gas, hydrogen sulfide, mercaptan, thioether, organic amine, organic acid and the like are generated, so that the water body becomes odorous. The iron, manganese and other metal ions in the water body and the sulfur ions in the water form compounds such as ferrous sulfide, manganese sulfide and the like, and the suspended particles adsorb the ferrous sulfide, the manganese sulfide and the like, so that the water body turns black.
The good effect of aeration reoxygenation on the elimination of the black and odorous water body is proved by some laboratory tests and river aeration pilot tests in China. The principle is that the dissolved oxygen and black smelly substances (H) enter the water body2Reducing substances such as S, FeS, etc.) are subjected to redox reaction. For the black and odorous river in an anoxic state for a long time, a long-term process is generally needed for recovering the water ecosystem to a normal state, and aeration reoxygenation of the water body is beneficial to accelerating the process. When the dissolved oxygen of the water body is more than 6.0mg/L, the water body is in an aerobic state, the degradation rate and the ammoxidation rate of organic matters are also obviously increased, and the water body starts to have self-cleaning capability.
Aeration reoxygenation is carried out on black and odorous rivers, methods such as air blower aeration, pure oxygen aeration and mechanical aeration equipment which are directly and fixedly arranged in a river channel to aerate a water body are commonly used at present, but the problems of high energy consumption, low oxygen utilization rate and high noise exist generally. The aeration device can continuously supply oxygen to the black and odorous water body, so that the water body is in an aerobic state, the degradation rate of organic matters and the ammonia oxidation rate are increased, and the self-purification capacity of the water body is recovered, so that the treatment effect of black and odorous rivers is achieved, however, the oxygen content in the air is about 21 percent, namely, the aeration device also applies work to the gas except the oxygen, the energy consumption is high, the utilization rate of the oxygen is low, meanwhile, the traditional aeration device is large in noise, and the life of nearby residents is influenced during operation.
In addition, some existing schemes for treating black-odor rivers further include: 1) the invention relates to a landscape river aeration device and an aeration method (201610508605.0), which utilize bubble aeration and surface aeration to realize large-scale high dissolved oxygen of a water body and accelerate the efficiency of oxygen dissolution; 2) the invention relates to a river treatment system (201720629630.4) based on micro-nano aeration and biological purification effects, which uses a micro-nano bubble rapid generation device to cooperate with an aeration device to aerate the river. Although the methods improve the utilization rate of oxygen, the methods still do useless work on other gases in the air, the energy consumption is still high, and meanwhile, when the river water level is low, the contact time of the gases and the water body is short, and the utilization rate of the oxygen is low.
3) The invention discloses a high-efficiency liquid phase oxygenation method and a high-efficiency liquid phase oxygenation system (201610168592.7) for a water body, and the oxygenation method comprises the following steps: s1, at least respectively introducing compressed air and sewage and/or clean water sucked from a water area into the dissolved air tank to prepare high-efficiency liquid-phase oxygenated water; s2, conveying the high-efficiency liquid-phase oxygenated water to a micro-nano bubble generating device, and releasing oxygen carried in the high-efficiency liquid-phase oxygenated water into micro-oxygen bubbles through the micro-nano bubble generating device; s3, returning the sewage carrying the micron oxygen bubbles to the water area again through a plurality of flow pushers arranged below the water surface. According to the high-efficiency liquid-phase oxygenation method and system for the water body, disclosed by the invention, oxygen carried in high-efficiency liquid-phase oxygenation water is released into micro-nano bubbles through the micro-nano bubble generating device, and then sewage carrying the micro-nano bubbles is returned to the water area through the flow impeller so as to realize high-efficiency liquid-phase oxygenation treatment on black and odorous water. Utilize micro-nano technique to improve the utilization ratio of oxygen in this patent, nevertheless used the air as the oxygen source equally, it needs two jar bodies simultaneously, and equipment area is big.
4) The utility model discloses an aeration oxygen increasing machine (201820347099.6), which provides a novel aeration device, comprising a gas generating mechanism floating on the horizontal, an aeration mechanism extending to the bottom of the water and a water spraying mechanism; the water spraying mechanism comprises a water storage bin, the top of the water storage bin is communicated with the water spraying bin, the bottom of the water storage bin is sequentially connected with a water delivery pump and a water delivery pipe, and the water delivery pipe extends to the bottom of the water; the gas generation mechanism comprises two oxygenation pumps, the two oxygenation pumps are fixed on two sides of the water storage bin, the two oxygenation pumps are connected with air inlet pipes exposed out of the water, the bottoms of the two oxygenation pumps are connected with air conveying pipes extending to the bottom of the water, the two air conveying pipes are communicated with the aeration mechanism respectively, and the outer sides of the two oxygenation pumps are connected with two sides of the aeration mechanism through chains. The utility model adopts the aeration mechanism and the water spray mechanism to realize the simultaneous oxygenation under water and on water, thereby improving the oxygenation efficiency and being capable of being selected according to the needs; the structure of the main aeration pipe and the branch aeration pipe increases the contact area with the water in the pond, and the underwater aeration pipe can be horizontally placed at the bottom of the pond to perform uniform and effective aeration and oxygenation.
In summary, the methods for aeration reoxygenation of black-odor rivers can be currently summarized in three types: 1) a fixed blower room is arranged on a river bank, and air is introduced into an aeration diffusion system arranged at the bottom of a river channel through a pipeline for aeration and oxygenation; 2) liquid oxygen or oxygen generating equipment is adopted for generating oxygen, and then the oxygen is introduced into the river channel for aeration and oxygenation; 3) the oxygen is increased by a direct oxygen increasing machine.
The above methods all have a common disadvantage of high operation cost and low oxygen utilization rate. The method 1) uses the blower to carry out aeration, needs long-time operation, has high operation cost, has the oxygen content of only about 21 percent, needs to work other gases in the air, has little useful work, has low river water level, has short contact time of the gases and water, low oxygen utilization rate and large noise of the blower, and affects nearby residents. The method 2) adopts liquid oxygen or oxygen-making equipment to make oxygen, the treatment cost is very high, the solubility of oxygen in water is very limited under normal temperature and normal pressure, oxygen aeration is directly carried out, most of oxygen cannot be dissolved in water, the oxygen utilization rate is low, meanwhile, pathogenic microorganism pollution exists in black and odorous water, aerosol can be formed after aeration, and harm is brought to the health of nearby residents. The direct aerator in the method 3) needs to operate for a long time, the aerator has limited aeration range, low oxygen utilization rate and high cost, and the operation cost of the equipment is exponentially increased when the depth of the river water is low.
Disclosure of Invention
In view of the above, it is necessary to provide a device and a process for treating black and odorous rivers based on a bubble-free oxygenation technology, in order to solve the problems of the conventional black and odorous river treatment. The technical scheme of the invention is as follows:
in a first aspect, the invention provides a black and odorous river regulation device based on a bubble-free oxygenation technology, which comprises integrated purification equipment and a high-efficiency liquid-phase oxygenation system, wherein the integrated purification equipment and the high-efficiency liquid-phase oxygenation system are connected with each other;
the high-efficiency liquid-phase oxygenation system comprises a gas-water mixing tank, the top of the gas-water mixing tank is provided with a water inlet and an exhaust port, the side part of the gas-water mixing tank is provided with an oxygen inlet, the bottom of the gas-water mixing tank is provided with a high dissolved oxygen water discharge port, and the high dissolved oxygen water discharge port is connected with an aerobic pool; a ceramic membrane gas-liquid contactor is arranged in the gas-water mixing tank; and the air inlet of the ceramic membrane gas-liquid contactor is communicated with the oxygen inlet.
Further, the integrated purification equipment is specifically MBR integrated purification equipment.
Furthermore, the ceramic membrane gas-liquid contactor is specifically of a tubular ceramic membrane with an opening on one side, the opening is communicated with the oxygen inlet, oxygen enters from one side of the opening of the tubular ceramic membrane through the oxygen inlet, permeates through the ceramic membrane and is diffused to the surface of the membrane, and the oxygen is dissolved in water on the surface of the membrane to form high-concentration oxygen-dissolved water.
Furthermore, the aperture of the tubular ceramic membrane is 0.05-0.2 μm.
Further, a safety valve is further arranged on the gas-water mixing tank.
Further, the water inlet is communicated with the high-pressure pump.
Furthermore, a check valve and an electromagnetic valve are further arranged between the high-pressure pump and the gas-water mixing tank, so that gas in the tank is prevented from flowing to the high-pressure pump when the system stops, and the next starting of the high-pressure pump is prevented from being influenced.
Further, the top of the gas-water mixing tank is provided with an emptying valve, the emptying valve is connected with a PLC control system, the PLC control system is used for setting the emptying valve to automatically empty and exhaust, and when used oxygen contains insoluble gas, the emptying valve is used for discharging the gas.
Further, still be equipped with manometer and level gauge on the air water mixing tank, the manometer is used for controlling pressure in the air water mixing tank, the level gauge is used for controlling the air water mixing tank drainage.
Further, the pressure of the gas-water mixing tank is controlled to be 5-25 bar, preferably 10-20 bar, and at the moment, the concentration of dissolved oxygen in the outlet water of the high-efficiency liquid-phase oxygenation system is 100-400 mg/L.
In a second aspect, the invention provides a black and odorous river surge treatment process based on a bubble-free oxygenation technology, which comprises the following steps:
step one, introducing the black and odorous river water into integrated purification equipment, and staying for 2-6 hours;
introducing the effluent and oxygen of the integrated purification equipment into a high-efficiency liquid-phase oxygenation system to prepare high-dissolved-oxygen water with the concentration of 200-400 mg/L;
and step three, releasing the high dissolved oxygen water into the black and odorous river through a pipeline water distributor.
Further, the oxygen pressure of the efficient liquid phase oxygenation system in the second step is 5-25 bar, and the internal and external pressure difference of the ceramic membrane gas-liquid contactor is more than 0.1 MPa.
Further, the oxygen pressure of the efficient liquid phase oxygenation system in the second step is 10-20 bar, and the internal and external pressure difference of the ceramic membrane gas-liquid contactor is more than 0.1 MPa.
Further, in the fifth step, the high dissolved oxygen water is released into the black and odorous river through the pipe water distributor, specifically: the water distributor with the perforated holes is used for releasing high-dissolved oxygen water, the size of the perforated holes is 4mm, the distance of the perforated holes is 0.5-1.0 m, and the direction of the perforated holes is horizontal. During practical application, a plurality of water distribution pipes are arranged along the axial direction of the river, the interval between the water distribution pipes is controlled to be 1.0-2.0 m, and the water distribution pipes are parallel to each other.
The invention has the beneficial effects that: because various sewage and other pollutants discharge to the river in, lead to the river to gush sewage dissolved oxygen and reduce over time, the oxygen deficiency appears, the black smelly condition appears finally, seriously influences the appearance of the city, traditional river course aeration compresses the air, then aerates in the river through aeration dish or hydrophobic membrane, because the oxygen content in the air is only 21%, and the river water level is low, and the bubble is short in the retention time of water after the aeration, and oxygen actual utilization is lower for this process energy consumption is higher. In contrast, the advantages of the present invention are embodied in the following points:
1) and dissolving oxygen in water by using a high-efficiency liquid phase oxygenation system under a high-pressure condition to obtain high-concentration oxygen-dissolved water with the concentration of 200-400 mg/L.
2) The water discharged by the integrated purification equipment is used as the incoming water of the high-efficiency liquid-phase oxygenation equipment, water is taken from the river, high-dissolved oxygen water is prepared after purification and is released into the river, and the quick repair of the black and odorous river is realized.
3) The obtained high-concentration dissolved oxygen water has high concentration of oxygen, and the high-concentration dissolved oxygen water can quickly improve the concentration of dissolved oxygen in the black and odorous bottom mud of the riverbed, so that anaerobic microorganisms in the bottom mud die, malodorous gas is not generated any more, aerobic bacterial colonies are formed, organic matters are decomposed, and the bottom mud is quickly changed from black to yellow brown.
4) Solves the problems that the prior black and odorous river has low oxygenation efficiency, difficult improvement of dissolved oxygen, unsolved black and odorous bottom mud problem, slow river repair speed and the like.
Drawings
Fig. 1 is a schematic structural diagram of the black and odorous river regulation device based on the bubble-free oxygenation technology.
FIG. 2 is a schematic structural diagram of the high efficiency liquid phase oxygenation system of the present invention.
FIG. 3 is a top view of the partial structure of the gas-water mixing tank of the present invention.
FIG. 4 is a front view of the partial structure of the gas-water mixing tank of the present invention.
In the figures 2-4, a gas-water mixing tank 1, a water inlet 2, an exhaust port 3, an oxygen inlet 4, a high dissolved oxygen water discharge port 5, a ceramic membrane gas-liquid contactor 6, a ceramic membrane 7, a ceramic membrane 8, a connection port of the ceramic membrane and the oxygen inlet, a safety valve 9, a high-pressure pump 10, a check valve 11, an electromagnetic valve 12, an air release valve 13, a pressure gauge 14 and a liquid level meter 15.
Detailed Description
The MBR integrated purification equipment adopted in the embodiment of the invention has the model of MBR-30 or MBR-50.
In the description of the present invention, it is to be noted that those whose specific conditions are not specified in the examples are carried out according to the conventional conditions or the conditions recommended by the manufacturers. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
As shown in fig. 1, an embodiment of the present invention provides a black and odorous river regulation device based on a bubble-free oxygenation technology, which includes an MBR integrated purification apparatus and a high performance liquid phase oxygenation system connected to each other, and an oxygen-dissolved water release module, i.e., a pipe water distributor.
As shown in fig. 2 to 4, the high-efficiency liquid phase oxygenation system comprises a gas-water mixing tank 1, a water inlet 2 and an exhaust port 3 are arranged at the top of the gas-water mixing tank 1, an oxygen inlet 4 is arranged at the side of the gas-water mixing tank 1, a high dissolved oxygen water discharge port 5 is arranged at the bottom of the gas-water mixing tank 1, and the high dissolved oxygen water discharge port 5 is connected with the aerobic pool. A high-pressure pump 10, a check valve 11 and an electromagnetic valve 12 are arranged on a water inlet pipeline connected with the water inlet 2, and the check valve 11 and the electromagnetic valve 12 are used for preventing gas in the tank from flowing into the high-pressure pump 10 when the system is stopped so as to influence the next start of the high-pressure pump 10. A ceramic membrane gas-liquid contactor 6 is arranged in the gas-water mixing tank 1, and a gas inlet of the ceramic membrane gas-liquid contactor 6 is communicated with the oxygen inlet (as shown in a connection port 8 of the ceramic membrane and the oxygen inlet in fig. 2). The ceramic membrane gas-liquid contactor 6 is specifically structured by a tubular ceramic membrane 7 with an opening on one side and a pore diameter of 0.05-0.2 mu m. Oxygen enters from the opening side of the tubular ceramic membrane 7 through the oxygen inlet, is diffused to the surface of the membrane through the ceramic membrane 7, and is dissolved in water on the surface of the membrane to form high-concentration oxygen-dissolved water. The gas-water mixing tank 1 is further provided with a safety valve 9 and an emptying valve 13, the emptying valve 13 is connected with a PLC control system, the PLC control system is used for setting the emptying valve to automatically empty and exhaust gas, and when used oxygen contains insoluble gas, the emptying valve is used for discharging the gas. The gas-water mixing tank 1 is further provided with a pressure gauge 14 and a liquid level meter 15, the pressure gauge 14 is used for controlling the pressure in the gas-water mixing tank 1, and the liquid level meter 15 is used for controlling the water drainage of the gas-water mixing tank 1.
The specific embodiment of the invention also provides a black and odorous river surge treatment process based on the foamless oxygenation technology, which comprises the following steps:
step one, introducing the black and odorous river surge water into MBR integrated purification equipment, and staying for 2-6 h;
introducing the effluent and oxygen of the integrated purification equipment into a high-efficiency liquid-phase oxygenation system to prepare high-dissolved-oxygen water with the concentration of 200-400 mg/L; the oxygen pressure of the high-efficiency liquid phase oxygenation system is 5-25 bar, and the internal and external pressure difference of the ceramic membrane gas-liquid contactor is more than 0.1 MPa.
And step three, releasing the high dissolved oxygen water into the black and odorous river through a pipeline water distributor. The method specifically comprises the following steps: the water distributor with the perforated holes is used for releasing high-dissolved oxygen water, the size of the perforated holes is 4mm, the distance of the perforated holes is 0.5-1.0 m, and the direction of the perforated holes is horizontal. During practical application, a plurality of water distribution pipes are arranged along the axial direction of the river, the interval between the water distribution pipes is controlled to be 1.0-2.0 m, and the water distribution pipes are parallel to each other.
Example 1
The embodiment treats a certain river surge in the southern sand area of Guangzhou city by the device and the method. This river gushes for breaking end and gushes, and the river gushes width is 2 ~ 3m, because the reposition of redundant personnel of front end rain and sewage is not thorough, has throughout the year sewage inflow river gushes, causes the river to gush black smelly, before administering, carries out the water distributor installation earlier: 3 parallel water distribution pipes are arranged at the bottom of the river along the axial direction, the pipe diameters of the water distribution pipes are 20mm, the interval between the adjacent water distribution pipes is 1.2m, each water distribution pipe is horizontally provided with dissolved oxygen water release holes with the hole diameter of 4mm, the distance between the adjacent release holes is 0.5m, and the inlets of the water distribution pipes are connected to 5-high dissolved oxygen water discharge ports of a gas-liquid contact tank in the figure 2; preparing high dissolved oxygen water: introducing black and odorous river water into MBR integrated purification equipment through a water pump, introducing obtained effluent into a high-efficiency liquid phase oxygenation system, introducing oxygen into the high-efficiency liquid phase oxygenation system, preparing high-dissolved oxygen water with the concentration of 200-400 mg/L in the equipment, controlling the pressure of the high-efficiency liquid phase oxygenation system to be 15bar, controlling the oxygen amount by controlling the transmembrane pressure difference of a ceramic membrane gas-liquid contactor, controlling the volume ratio of the gas to the water to be 1:5, and then discharging the high-dissolved oxygen water into the river through a water distribution pipeline, wherein the process is continuously carried out. And detecting the water quality conditions before and after treatment.
The treatment effect is as follows:
TABLE 1 Water quality before and after treatment
As can be seen from the data in Table 1, the sediment of the river gush before treatment is black and has odor, the transparency of the river gush is improved by over 600 percent after 7 days of treatment, the dissolved oxygen concentration is improved by 48 times, the oxidation-reduction potential is improved to 166mV from a negative value, the ammonia nitrogen concentration is reduced to 5mg/L, and the treated sediment is yellow brown and has slight earthy smell. According to the standard of black and odorous water body division, the treated wastewater does not belong to the black and odorous water body, so that the aim of eliminating black and odorous water is fulfilled.
Example 2
In the embodiment, pilot test treatment is carried out on a certain black and odorous river in south sand areas of Guangzhou city by the device and the method, the width of the river is 5-6m, the test length is selected to be 50m, and the specific treatment process is as follows: the water distribution pipe is manufactured, the opening distance is 1.0m, the opening aperture is 4mm, and the pipe diameter of the water distribution pipe is 20 mm. The water distribution pipes are sunk into the bottom sediment of the river in parallel, the water distribution pipes are parallel to each other and spaced by 1.5m, 3 water distribution pipes are arranged in total, and the inlets of the water distribution pipes are connected to 5-high dissolved oxygen water discharge outlets of the gas-liquid contact tank in figure 2. The river water is lifted to MBR integrated purification equipment for treatment by a lift pump, suspended matters in the river water are removed, the effluent is used as the inlet water of the gas-liquid contact tank, and the inlet water is pumped into the gas-liquid contact tank by a high-pressure pump. Oxygen enters from the side surface of the gas-liquid contact tank, the volume ratio of the gas to the water is controlled to be 1 (5-7), the pressure in the tank is 14-16bar, and high dissolved oxygen water with the dissolved oxygen concentration of 250-300mg/L is obtained. The high dissolved oxygen water is led to pass through by utilizing the pressure in the tankThe water distribution pipeline is dispersed into the bottom mud of the riverbed. Reoxygenating the bottom mud to eliminate black and stink and oxidize the bottom mud. The output water volume of the high-efficiency liquid-phase oxygenation system is about 0.5m3And h, starting up for 8 hours every day. .
The following treatment effects were obtained:
TABLE 2 Water quality before and after treatment
As can be seen from the data in Table 2, the sediment of the river gush before treatment is black and has odor, the transparency of the river gush is obviously improved after 7 days of treatment, the transparency reaches 72cm and more than 25cm, the dissolved oxygen concentration is improved from 0mg/L to 9.2mg/L, the oxidation-reduction potential is improved to 183mV which is higher than 50mV, the ammonia nitrogen concentration is reduced by 78 percent to 7mg/L, and the treated sediment is yellow brown and has slight earthy smell. The purpose of eliminating the black and odorous river surge is realized.
Example 3
The embodiment treats a river surge in Guangzhou city by the device and the method. The river is originally slightly black and odorous, and the main problems are that the ammonia nitrogen is higher and the dissolved oxygen concentration is low. The river is broken-end, 10-16m in width and 950m in length, and 30m at the source is selected for testing. A high-efficiency liquid phase oxygenation system with high dissolved oxygen water preparation capacity of 1m3/h is selected. This experiment adopts the running water as the air water contact jar intake, is carried to the jar in by the high-pressure pump, and control air water volume ratio is 1: (4-6), obtaining high dissolved oxygen water with the dissolved oxygen concentration of 300-400mg/L, and conveying the high dissolved oxygen water to the river bottom through a water distribution pipeline. 6 water distribution pipes are arranged along the longitudinal direction of the bottom of the riverbed, the mutual spacing between the water distribution pipes is 1.5m, the pipes are horizontally perforated, and the perforation distance is 1.0 m. In order to distribute water uniformly, every two water distribution pipes are used as a group, and 3 groups of water distribution pipes are switched in turn and are switched once every 3 hours. The high-efficiency liquid phase oxygenation system is started for 9 hours every day.
The following treatment effects were obtained:
TABLE 3 Water quality before and after treatment
As can be seen from the data in Table 3, the transparency of the river surge is obviously improved only after the treatment for 3 days, the dissolved oxygen concentration is improved by 16 times, the oxidation-reduction potential is improved to 153mV, and the ammonia nitrogen concentration is reduced by 67% to 6 mg/L. The treated waste water does not belong to black and odorous water, so that the aim of eliminating black and odorous water is fulfilled.
In summary, the invention provides a technology for repairing black and odorous rivers by using high dissolved oxygen water, the water of the black and odorous rivers is firstly purified by integrated purification equipment, the purified effluent is firstly pressurized by a high-pressure pump, enters the equipment and is contacted with oxygen through a ceramic membrane gas-liquid contactor, the oxygen is efficiently dissolved in the water to form bubble-free dissolved oxygen, a water outlet is opened at regular time through liquid level control to ensure that the pressure in a tank body is stable, the highest concentration of the effluent dissolved oxygen can reach 400mg/L, and the effluent dissolved oxygen is injected into the bottom of the black and odorous rivers, so that the rivers can be oxygenated rapidly, bottom mud is oxidized, odor is prevented from being generated by continuous anaerobic action of organic matters in the bottom mud, sulfides and the like are oxidized, black and odorous water is eliminated, and effective treatment of the black and odorous rivers.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a black and odorous river surge treatment device based on foamless oxygenation technique which characterized in that: comprises an integrated purification device and a high-efficiency liquid phase oxygenation system which are connected with each other;
the high-efficiency liquid-phase oxygenation system comprises a gas-water mixing tank, the top of the gas-water mixing tank is provided with a water inlet and an exhaust port, the side part of the gas-water mixing tank is provided with an oxygen inlet, the bottom of the gas-water mixing tank is provided with a high dissolved oxygen water discharge port, and the high dissolved oxygen water discharge port is connected with an aerobic pool; a ceramic membrane gas-liquid contactor is arranged in the gas-water mixing tank; and the air inlet of the ceramic membrane gas-liquid contactor is communicated with the oxygen inlet.
2. The black and odorous river regulation device based on the foamless oxygenation technology as claimed in claim 1, wherein: the ceramic membrane gas-liquid contactor is structurally characterized in that the ceramic membrane gas-liquid contactor is a tubular ceramic membrane with an opening on one side, the opening is communicated with the oxygen inlet, oxygen enters from one side of the opening of the tubular ceramic membrane through the oxygen inlet, permeates through the ceramic membrane and diffuses to the surface of the membrane, and the oxygen is dissolved in water on the surface of the membrane to form high-concentration oxygen-dissolved water.
3. The black and odorous river regulation device based on the foamless oxygenation technology as claimed in claim 2, wherein: the aperture of the tubular ceramic membrane is 0.05-0.2 μm.
4. The black and odorous river regulation device based on the foamless oxygenation technology as claimed in claim 1, wherein: the gas-water mixing tank is also provided with a safety valve.
5. The black and odorous river regulation device based on the foamless oxygenation technology as claimed in claim 1, wherein: the water inlet is communicated with the high-pressure pump.
6. The black and odorous river regulation device based on the foamless oxygenation technology as claimed in claim 5, wherein: the high-pressure pump with still be equipped with check valve and solenoid valve between the gas-water mixing tank, gaseous fleeing to the high-pressure pump in preventing when the system stops influences the next start-up of high-pressure pump.
7. The black and odorous river regulation device based on the foamless oxygenation technology as claimed in claim 1, wherein: the top of the gas-water mixing tank is provided with an emptying valve, the emptying valve is connected with a PLC control system, the PLC control system is used for setting the emptying valve to automatically empty and exhaust, insoluble gas is contained in used oxygen, and the emptying valve is used for discharging the gas.
8. The black and odorous river regulation device based on the foamless oxygenation technology as claimed in claim 1, wherein: the gas-water mixing tank is characterized in that a pressure gauge and a liquid level meter are further arranged on the gas-water mixing tank, the pressure gauge is used for controlling the pressure in the gas-water mixing tank, and the liquid level meter is used for controlling the water drainage of the gas-water mixing tank.
9. The black and odorous river regulation device based on the foamless oxygenation technology of claim 8, wherein: the pressure of the gas-water mixing tank is controlled to be 5-25 bar, preferably 10-20 bar, and at the moment, the concentration of dissolved oxygen in the effluent of the high-efficiency liquid-phase oxygenation system is 100-400 mg/L.
10. A black and odorous river governing process based on a foamless oxygenation technology is characterized in that: the device of any one of claims 1 to 9 is used, and the process comprises the following steps:
step one, introducing the black and odorous river water into integrated purification equipment, and staying for 2-6 hours;
introducing the effluent and oxygen of the integrated purification equipment into a high-efficiency liquid-phase oxygenation system to prepare high-dissolved-oxygen water with the concentration of 200-400 mg/L;
and step three, releasing the high dissolved oxygen water into the black and odorous river through a pipeline water distributor.
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| CN201911233421.8A Pending CN110980927A (en) | 2019-08-23 | 2019-12-05 | Black and odorous river regulation device and process based on bubble-free oxygenation technology |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101234834A (en) * | 2008-01-31 | 2008-08-06 | 浙江大学 | Pressure type foamless film type oxygenating system and method thereof |
| JP2013545604A (en) * | 2010-11-11 | 2013-12-26 | グリーン テクノロジー カンパニー リミテッド | Membrane air diffuser with backflow prevention function |
| CN206345726U (en) * | 2016-12-16 | 2017-07-21 | 南京工业大学 | Purification of water quality and oxygen increasing equipment for closed recirculating cultivating system |
| CN107758884A (en) * | 2017-10-31 | 2018-03-06 | 杭州安诺过滤器材有限公司 | A kind of bubble-free aeration system and aeration method for river course water harnessing |
| CN108218137A (en) * | 2018-02-27 | 2018-06-29 | 华南理工大学 | A kind of river black and odorous water fast purification method and device |
| CN109851037A (en) * | 2019-03-25 | 2019-06-07 | 苏州市职业大学 | Pure oxygen nanometer aeration-porous ceramic film screening black smelly water treatment facilities and treatment process |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514049B (en) * | 2009-03-26 | 2011-01-05 | 浙江大学 | Rotary type hollow fiber porous membrane foamless oxygen charging device and method |
| CN101817624B (en) * | 2010-05-11 | 2012-02-15 | 杭州求是膜技术有限公司 | Comprehensive treatment method for fluorescent brightener production wastewater |
| CN203890124U (en) * | 2014-05-25 | 2014-10-22 | 山东正清环保科技有限公司 | High dissolved oxygen plug-free defoaming jet aerator |
| CN104086041B (en) * | 2014-06-17 | 2016-04-20 | 南京绿岛环境工程有限公司 | A kind of surface active agent wastewater treatment system and technique |
| CN204874193U (en) * | 2015-07-13 | 2015-12-16 | 济南兄弟环保科技有限公司 | Process hides advanced waste treatment system |
| CN106621863A (en) * | 2016-11-07 | 2017-05-10 | 中材科技股份有限公司 | PTFE hollow fiber film used for bubbleless aeration oxygenation, and preparation method thereof |
| US10858274B2 (en) * | 2017-03-22 | 2020-12-08 | John H. Reid | Wastewater detoxification method and system |
| CN108101299B (en) * | 2017-12-12 | 2020-07-17 | 浙江东发环保工程有限公司 | High-vanadium SCR denitration catalyst regeneration wastewater treatment method |
| CN109574401A (en) * | 2018-12-28 | 2019-04-05 | 苏州南风优联环保工程有限公司 | Textile auxiliary produces waste water zero discharge treatment process and equipment |
-
2019
- 2019-08-27 CN CN201910796863.7A patent/CN110590056A/en active Pending
- 2019-12-05 CN CN201911233421.8A patent/CN110980927A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101234834A (en) * | 2008-01-31 | 2008-08-06 | 浙江大学 | Pressure type foamless film type oxygenating system and method thereof |
| JP2013545604A (en) * | 2010-11-11 | 2013-12-26 | グリーン テクノロジー カンパニー リミテッド | Membrane air diffuser with backflow prevention function |
| CN206345726U (en) * | 2016-12-16 | 2017-07-21 | 南京工业大学 | Purification of water quality and oxygen increasing equipment for closed recirculating cultivating system |
| CN107758884A (en) * | 2017-10-31 | 2018-03-06 | 杭州安诺过滤器材有限公司 | A kind of bubble-free aeration system and aeration method for river course water harnessing |
| CN108218137A (en) * | 2018-02-27 | 2018-06-29 | 华南理工大学 | A kind of river black and odorous water fast purification method and device |
| CN109851037A (en) * | 2019-03-25 | 2019-06-07 | 苏州市职业大学 | Pure oxygen nanometer aeration-porous ceramic film screening black smelly water treatment facilities and treatment process |
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