CN117263440B - Aeration system and power station water pollution control system - Google Patents

Abstract

The invention discloses an aeration system and a power station water pollution treatment system, which comprises a tank body, an aeration unit, a cover body and a gas recovery and treatment unit, wherein the tank body comprises an aeration tank and an ozone oxidation tank, the cover body is covered above the tank body to form an isolated space, a plurality of air suction channels are formed on the cover body, the air suction channels are communicated with the isolated space, the gas recovery and treatment unit comprises an air suction mechanism and a treatment mechanism which are sequentially connected, the input end of the air suction mechanism is connected with each air suction channel, and the treatment mechanism is connected with the ozone oxidation tank. Through the cooperation among the cover body, the gas recovery processing unit and the tank body, the volatilized harmful gas in the aeration tank can be isolated and purified, the environment is prevented from being polluted, meanwhile, the condition that the working environment outside the cover body is used for sucking the harmful gas by workers to influence the health is avoided, and the conditions in the aeration tank and the ozone oxidation tank are conveniently and intuitively observed through the cover body; and the cover body can isolate noise generated by the aeration unit and maintain the comfort of the environment.

Description

Aeration system and power station water pollution control system

Technical Field

The invention relates to the field of power station wastewater treatment, in particular to an aeration system and a power station water pollution treatment system.

Background

The power station is a junction project for converting water energy into electric energy, and the power generation project is complicated and complicated, and different waste water such as: the oily wastewater, the desulfurization wastewater, the ash flushing wastewater, the chemical wastewater and the like contain a large amount of components polluting the environment such as heavy metals, suspended matters, organic matters and the like, and the direct discharge can destroy the ecology of the environment, so serious consequences are caused, and the treatment of the wastewater is particularly critical.

The desulfurization wastewater is discharged water of an absorption tower in the wet desulfurization process of boiler flue gas, and contains various pollutants such as suspended matters, supersaturated sulfite, sulfate, heavy metals and the like, an aeration tank is used as an important component for desulfurization wastewater treatment, an activated sludge method is mainly used for wastewater treatment, a certain residence time is provided for the wastewater, and the oxygen amount required by aerobic microorganisms and the mixing condition of full contact of sewage activated sludge are met.

The traditional aeration tank is often arranged in the open air, and the wastewater in the aeration tank is provided with volatile gases with high concentration and irritation such as mercaptan, VOCs (volatile organic compounds) and the like, which are scattered into the air after being temporarily remained in the wastewater, so that the human body can be in harm to the health for a long time, and meanwhile, the harmful gases are scattered everywhere to pollute the environment to a certain extent.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to solve the technical problems that: an aeration system and a power station water pollution control system are provided to solve the problems that harmful gas generated by an aeration tank diffuses to pollute the environment and influence the health of human bodies.

In order to solve the technical problems, the invention adopts a technical scheme that: the aeration system comprises a tank body, an aeration unit for conveying gas into the aeration tank, a cover body and a gas recovery treatment unit, wherein the top of the tank body is arranged in an open mode, and the tank body comprises an aeration tank and an ozone oxidation tank which are arranged in a separated mode; the cover body is made of transparent and sound-absorbing materials and is covered above the tank body to form an isolation space so as to isolate various harmful gases volatilized in the aeration tank and avoid polluting air and natural environment, a plurality of air suction channels distributed in a tree shape are formed on the cover body, and the input ends of the air suction channels are communicated with the isolation space, and the output ends are converged in a main channel so as to be distributed on each part of the cover body; the gas recovery processing unit comprises an air extraction mechanism and a processing mechanism which are sequentially connected, wherein the input end of the air extraction mechanism is connected with a main channel, harmful gas in an isolated space is extracted through each air suction channel, workers are guaranteed to be able to enter the isolated space to check the condition of an aeration tank and the like, even if the harmful gas does not enter the isolated space, the condition of the aeration tank can be observed through a transparent cover body, and therefore harm to human bodies caused by harmful gas generated by waste water in the aeration tank is avoided, the output end of the processing mechanism is connected with an ozone oxidation tank, the processing mechanism can purify the harmful gas extracted in the isolated space and is led into an ozone maintenance tank to further degrade the harm of the harmful gas, so that the harmful gas generated by the aeration tank is bad, and the problems of human health and environmental pollution are solved.

Further, the treatment mechanism comprises a combustion part communicated with the output end of the air extraction mechanism and a filtering part with the input end communicated with the output end of the combustion part, the combustion part converts harmful gas into harmless substances in a combustion mode, the harmful gas can be effectively eliminated, the filtering part further filters the harmful gas after combustion, some harmful substances which are burnt and cannot be converted at high temperature are intercepted, the output end of the filtering part is communicated with the ozone oxidation tank, so that the filtered gas is conveyed to the ozone oxidation tank for catalytic oxidation, the aim of multiple purification is achieved, and the purification effect is ensured.

Further, the treatment mechanism further comprises a housing, and the combustion part is arranged on the housing; the combustion part comprises a combustion chamber formed in the shell, a gas conveying part, a spark plug and an air supply part, wherein the gas conveying part is arranged on the shell, the output end of the gas conveying part is communicated into the combustion chamber and used for conveying natural gas into the combustion chamber, the spark plug is arranged at the output end of the gas conveying part, the air supply part is used for conveying air into the combustion chamber, the combustion chamber is provided with a first air inlet communicated with an air suction mechanism and a first air outlet communicated with a filtering part, and a first valve is arranged at the first air outlet, so that harmful gas can be combusted in the air suction mechanism in a mode of igniting the gas.

Further, the filter part comprises a filter chamber formed in the shell and a filter screen arranged in the filter chamber and used for dividing the filter chamber into a transition chamber and a filter chamber, the filter chamber is provided with a second air inlet which is respectively arranged at two sides of the filter screen and is communicated with the first air outlet, and a second air outlet which is communicated with the ozone oxidation tank, the transition chamber is positioned at one side close to the second air inlet, the transition chamber is used for cooling the burnt gas in the combustion chamber to a certain extent, the filter chamber is positioned at one side close to the second air outlet, a filter material is filled in the filter chamber, and the filter material is used for intercepting and filtering part of conversion substances in the burnt harmful gas, so that the filtered gas is sent into the ozone oxidation tank.

Further, the treatment mechanism further comprises a heat recovery part arranged on the shell; the heat recovery part comprises a heat exchange chamber which is formed in the shell and is arranged in a surrounding manner in the combustion chamber and is independent of the combustion chamber, so that heat exchange is performed in the high-temperature combustion chamber when harmful gases are combusted, the heat exchange chamber is provided with a third air inlet and a third air outlet, and the third air outlet is connected with the aeration unit so as to be capable of conveying high-temperature gases into the aeration tank, so that the oxygen content of aerobic microorganisms is met, the activity of the aerobic microorganisms is improved, and meanwhile, the service lives of equipment and filter materials are prolonged; the air supply part comprises a first fan arranged outside the shell and an air inlet channel formed in the shell, wherein the input end of the air inlet channel is connected with the output end of the first fan, and the output end of the air inlet channel is divided into two parts which are respectively communicated with the combustion chamber and the third air inlet so that combustion and gas heat exchange are performed simultaneously.

Further, the aeration unit comprises a second fan, a first pipeline and an aeration mechanism, wherein the second fan is arranged outside the cover body, the input end of the first pipeline is connected with the output end of the second fan, the aeration mechanism is arranged at the bottom of the aeration tank, the output end of the first pipeline is divided into two parts, namely a first branch pipe and a second branch pipe, the first branch pipe is connected with the aeration mechanism, a venturi tube is arranged on the first branch pipe, and the second branch pipe extends into an isolated space; the third air outlet is connected to the first branch pipe through a second pipeline, and the output end of the second pipeline is connected to the throat section of the venturi tube so as to avoid the backflow of air in the second pipeline.

Further, the aeration mechanism comprises an aeration pipe which is arranged at the bottom of the aeration tank and communicated with the first branch pipe, and a plurality of aeration heads which are arranged on the aeration pipe at equal intervals along the length direction of the aeration pipe and communicated with the inner cavity of the aeration pipe; the aeration head comprises a base connected to the aeration pipe, and a head which is arranged on the base in a rotating manner so as to rotate along the circumferential direction of the base, wherein a sealed air outlet cavity which is communicated with the inner cavity of the aeration pipe is formed between the base and the head, a plurality of air guide covers are arranged on the outer side wall of the head at equal intervals around the head, a plurality of air outlet holes which are adapted to the communicated air outlet cavity of the air guide covers and outwards penetrate through the air guide covers are formed in the head, and the air outlet holes are arranged in a tangential manner in the head in the axial direction at one end of the air outlet cavity, so that high-pressure gas can be output through the air outlet holes after entering the air outlet cavity so as to drive the whole head to rotate, thereby stirring the bottom of the aeration tank, avoiding deposition of impurities on the aeration head, and simultaneously, preventing the air outlet holes from being blocked due to deposition on each air guide cover at the side to a certain extent.

Further, the base comprises an inner pipe, a fixed sleeve, a sliding sleeve and a spring, wherein the inner pipe is arranged along the vertical direction, the bottom end of the inner pipe is connected and communicated with the aeration pipe, the fixed sleeve is fixedly sleeved on the outer wall of the inner pipe, the sliding sleeve is sleeved on the inner pipe in a sliding manner, the spring is arranged between the fixed sleeve and the sliding sleeve, the head is coaxial with the sliding sleeve and the inner pipe, a sliding groove is formed in the bottom surface of the head so as to be sleeved on the inner pipe in a sliding manner, the air outlet is communicated with the inner cavity of the sliding groove, and the bottom surface of the head is rotationally connected with the top surface of the sliding sleeve so that the head can rotate and slide relative to the inner cylinder; when the gas is conveyed into the aeration pipe, the high-pressure gas pushes the head part towards one side far away from the aeration pipe, so that the sliding sleeve and the head part slide towards one side far away from the aeration pipe along the axial direction of the inner pipe, the spring is in a stretching state, and the sliding groove and the inner cavity of the inner pipe are jointly enclosed to form the gas outlet cavity so as to convey the gas into the aeration tank and form bubbles, thereby ensuring the oxygen demand of aerobic microorganisms; when the gas is not conveyed into the aeration pipe, the thrust is lost in the gas outlet cavity, the spring rebounds and contracts to pull the sliding sleeve and the head to slide towards one side of the aeration pipe until the spring is in a normal state, at the moment, the inner pipe blocks the gas outlet hole, the static aeration head is prevented from being blocked by deposited impurities, and meanwhile, waste water can be prevented from flowing backwards into the aeration pipe to a certain extent.

Further, the aeration system of the invention also comprises a planting unit arranged in the cover body; the planting unit is including setting up at the planting groove of aeration tank top border position department, filling in planting soil in planting groove and planting in planting soil's green, planting inslot and be located planting soil's bottom and laid a plurality of particle diameters and be greater than 1.5 cm's ventilative matrix, and set up the perforation in a plurality of intercommunication aeration tanks on planting inslot's the bottom surface to make green planting can absorb partial harmful gas, and the root system of green planting can absorb partial heavy metal and harmful substance that exists in the aeration tank through ventilative matrix and perforation, when promoting waste water treatment effect, promotes the internal air quality of cover, beautifies the internal environment of cover, and transparent cover makes green planting still can carry out photosynthesis.

The invention also provides a power station water pollution treatment system, which comprises a primary sedimentation tank, a neutralization tank, a sedimentation tank, a flocculation tank, a clarifier and a dosing mechanism which are sequentially arranged, wherein the output end of the clarifier is respectively connected with a filter press for treating sludge and a mixing tank for treating wastewater, the output end of the mixing tank is connected with a clean water tank, and the dosing mechanism is used for adding corresponding medicaments to each part so as to treat desulfurization wastewater; the primary settling tank comprises an aeration system as defined above to enable the treatment of volatile organic compounds.

The aeration system and the power station water pollution treatment system have at least the following beneficial effects:

Through the cooperation between the cover body, the gas recovery processing unit and the tank body, the volatilized harmful gas in the aeration tank can be isolated, the environment is prevented from being polluted, meanwhile, workers are prevented from being influenced by sucking the harmful gas in the working environment outside the cover body, the workers can directly observe the conditions in the aeration tank and the ozone oxidation tank through the cover body, and the workers do not need to enter the cover body, so that the health of the workers is further ensured; meanwhile, the cover body made of sound-absorbing materials can isolate noise generated by the aeration unit, so that the comfort of the environment is maintained; the gas recovery processing unit collects and purifies harmful gas in the cover body, and finally discharges the purified gas into the ozone oxidation pond for further purification, so that the harmful gas is circulated, and the damage to facility equipment caused by long-time accumulation of high-concentration harmful gas in the cover body is avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:

FIG. 1 is a block diagram of a power station water pollution abatement system of the present invention;

fig. 2 is a schematic view of the structure of the aeration system of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a cross-sectional view of the treatment mechanism of the present invention;

Fig. 5 is a sectional view showing a state in which the aeration head of the present invention is used;

fig. 6 is a top view of the aeration head of the present invention.

The meaning of the reference numerals in the drawings are:

an aeration tank-11; an ozone oxidation pond-12;

A second fan-21; a first pipe-22; a first branch pipe-221; a second branch pipe-222; fourth valve-223; an aeration mechanism-23; aeration tube-231; aeration head-232; a base-2321; inner tube-23211; a fixed sleeve-23212; sliding sleeve-23213; spring-23214; head-2322; air outlet cavity-2323; air outlet hole-2324; a wind scooper-2325;

a cover body-3; isolation space-31; an air suction passage-32; a main channel-321;

A third fan-41; fourth pipe-42; a fifth pipe-43; a housing-44; a first air inlet-441; first outlet port-442; a first valve-443; a second valve-444; a second air outlet port-445; a third air outlet-446; a combustion section-45; a combustion chamber-451; a gas delivery section-452; pressure regulating valve-4521; sixth conduit-4522; plenum-4523; seventh conduit-4524; a flow regulating valve-4525; an air outlet pipe-4526; spark plug-453; an air supply unit-454; first fan-4541; an air inlet channel-4542; third valve-4543; a filter section-46; a filter chamber-461; transition lumen-4611; filter material-4612; filter screen-462; a third conduit-463; a heat recovery unit (47); a heat exchange chamber-471; venturi-472; a second duct-473;

planting units-5; planting groove-51; planting soil-52; green plant-53; a breathable matrix-54; perforation-55.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Referring to fig. 1, the power station water pollution treatment system of the invention comprises a primary sedimentation tank, a neutralization tank, a sedimentation tank, a flocculation tank, a clarifier, a filter press, a mixing tank, a clean water tank and a dosing mechanism, wherein the primary sedimentation tank, the neutralization tank, the sedimentation tank, the flocculation tank, the clarifier, the mixing tank and the clean water tank are sequentially connected through pipelines, and the filter press and the mixing tank are respectively connected to the output end of the clarifier. The primary sedimentation tank comprises a preliminary sedimentation tank and an aeration system which are sequentially connected, desulfurization wastewater (hereinafter referred to as wastewater) firstly enters the preliminary sedimentation tank for primary sedimentation, large particles such as sludge in the wastewater are naturally precipitated, and the aeration system is used for meeting the oxygen requirement of aerobic microorganisms by increasing the oxygen content in the wastewater and ensuring that activated sludge is in more full contact with air; the dosing mechanism is used for respectively adding lime emulsion into the neutralization tank, adding organic sulfur into the sedimentation tank, adding flocculant into the flocculation tank, adding coagulant aid into a pipeline between the flocculation tank and the clarifier, and adding sodium hypochlorite and/or hydrochloric acid into the clarifier, so that the lime emulsion and the wastewater are mixed in the neutralization tank to raise the pH value of the wastewater; the sedimentation tank fully stirs the mixed wastewater and adds organic sulfur to deposit sulfides and the like to separate the sulfides from the wastewater; the flocculation box is used for enabling the rest milling dispersed reasonable and colloid substances in the wastewater to be coagulated into large particles through mixing the wastewater and the flocculant, reducing the surface tension of the particles through adding the coagulant aid at an outlet, strengthening the growth process of the particles, and further promoting the precipitation of hydroxide and sulfide to form flocculates after entering a clarifier; the clarifier is used for depositing the bottom of the flocculate and discharging the flocculate to the filter press, so that the wastewater is layered with the sludge at the lower part of the upper clear water, the clear water flows to the mixing box, and the disinfection and sterilization effect is achieved by adding sodium hypochlorite and/or hydrochloric acid until the wastewater is discharged or reflowed; the filter press is used for carrying out dehydration on the sludge and then carrying out outward, so that the whole treatment process of the desulfurization wastewater is completed, and the direct discharge of the desulfurization wastewater is avoided to influence the environment. It should be noted that the pre-settling tank, neutralization tank, settling tank, flocculation tank, clarifier, filter press, mixing tank, clean water tank, and dosing mechanism of the present invention are all prior art and will not be described in detail herein.

Referring to fig. 2 to 6, the aeration system of the present invention includes a tank body having a hollow interior and an open top, an aeration unit for delivering gas into the aeration tank 11, a housing 3 provided over the tank body to form an isolated space 31, a gas recovery processing unit for recovering gas in the housing 3, and a planting unit 5 provided in the housing 3. The wastewater which is preliminarily precipitated in the preliminary sedimentation tank enters the tank body, and the wastewater entering the tank body is subjected to aeration treatment by matching with an aeration unit so as to meet the oxygen content requirement of aerobic microorganisms and the full contact between activated sludge and air; the cover body 3 isolates the tank body from the outside, and volatile harmful gases and various irritant gases in the wastewater entering the tank body cannot be emitted outside the cover body 3 to influence the good state of the ecological environment and the health of staff; the gas recovery processing unit is used for recovering various harmful gases filled in the cover body 3 and processing the recovered harmful gases to avoid that the service life of facility equipment is influenced by the accumulation of the harmful gases in the cover body 3 and to avoid that harmful spaces are formed in the cover body 3; the planting unit 5 can absorb a part of harmful gas in the air by planting the green plants 53, and can directly absorb a part of harmful substances in the waste water after the green plants 53 contact the waste water, and generate oxygen, so that the environment in the isolated space 31 is not bad.

The tank body comprises an aeration tank 11 and an ozone oxidation tank 12, an inlet well (not shown in the figure) is arranged outside the cover body 3, wastewater which is preliminarily precipitated in the preliminary sedimentation tank is pumped into the inlet well by a delivery pump, then is continuously pumped into the aeration tank 11, wastewater which is subjected to aeration treatment in the aeration tank 11 enters the ozone oxidation tank 12 and is subjected to catalytic oxidation by ozone, so that harmful substances and corrosive gases in the wastewater are removed, and the treated wastewater is discharged into the next procedure. The specific structures of the aeration tank 11 and the ozone oxidation tank 12 are well known in the art, and will not be described in detail herein.

The aeration unit comprises a second fan 21 positioned outside the cover body 3, a first pipeline 22 with an input end connected with an output end of the second fan 21, and an aeration mechanism 23 arranged at the bottom of the aeration tank 11 and connected with the output end of the first pipeline 22, wherein the second fan 21 is provided with an input end and an output end, after the aeration unit is operated, the input end sucks air and the output end conveys the air to the aeration mechanism 23 through the first pipeline 22, and the aeration mechanism 23 conveys bubbles into the aeration tank 11 so as to increase contact between wastewater and air and promote oxygen content in the wastewater.

The input end of the first pipe 22 is connected to the output end of the second fan 21, and preferably, the output end of the first pipe 22 is divided into a first branch pipe 221 and a second branch pipe 222, the output end of the first branch pipe 221 is connected to the aeration mechanism 23, the output end of the second branch pipe 222 is led into the isolation space 31 in the cover 3 for supplying air into the cover 3, fourth valves 223 are respectively arranged on the first branch pipe 221 and the second branch pipe 222 to respectively control the opening and closing of the first branch pipe 221 and the second branch pipe 222, the fourth valves 223 where the first branch pipe 221 and the second branch pipe 222 are located and the second fan 21 are all opened all the time when the aeration tank 11 is in use, and the fourth valves 223 where the second branch pipe 222 are located and the second fan 21 are also opened when the aeration tank 11 is not in use, so as to ensure that the isolation space 31 has enough air, and the second branch pipe 222 is matched with the gas recovery processing unit to stabilize the air pressure in the cover 3. Meanwhile, after the air is blown into the isolated space 31 through the second branch pipe 222, the air flow in the isolated space 31 can be stirred, so that the planting unit 5 can be more fully contacted with harmful gas, the existence of the harmful gas is further reduced, and the air flow in the isolated space 31 is stirred to enable more harmful gas to face the gas recovery processing unit, so that the gas recovery processing unit is more beneficial to recovering the harmful gas, the harmful gas in the isolated space 31 is guaranteed to be taken away as much as possible, and the isolated space 31 for workers to stay is guaranteed to be formed in the cover body 3, so that the aeration tank 11 can be observed at a short distance and the aeration tank 11 can be maintained.

Referring to fig. 5 and 6, the aeration mechanism 23 includes an aeration pipe 231 provided at the bottom of the aeration tank 11 and communicating with the first pipe 22, and a plurality of aeration heads 232 provided at the aeration pipe 231 at equal intervals along the length direction of the aeration pipe 231 and communicating with the inner cavity of the aeration pipe 231, and the input end of the aeration pipe 231 is connected with the first branch pipe 221 so that the second fan 21 can deliver air into the first pipe 22 through the first branch pipe 221, and the air is outputted through the aeration heads 232 to form bubbles in the wastewater and contact the wastewater. The aeration pipes 231 are arranged in a plurality of mutually parallel and equidistant modes, so that the bottom of the aeration tank 11 is uniformly distributed with the aeration tank 11, thereby meeting the oxygen demands of aerobic microorganisms and activated sludge as much as possible. It should be noted that the aeration mechanism 23 may also directly use the structure in the prior art to achieve aeration treatment of wastewater.

The aeration head 232 comprises a base 2321 connected to the aeration pipe 231, and a head 2322 rotatably arranged on the base 2321 so as to be capable of rotating along the circumferential direction of the base 2321, a sealed air outlet cavity 2323 communicated with the inner cavity of the aeration pipe 231 is jointly formed between the base 2321 and the head 2322, a plurality of air outlet holes 2324 communicated with the air outlet cavity 2323 and penetrating through the head 2322 outwards are formed in the head 2322, and after the first branch pipe 221 connected to the aeration pipe 231 conveys air into the air outlet cavity 2323 through the second fan 21, the air forms bubble output through the air outlet holes 2324 so as to be contacted with waste water. Because sediment still can be produced in the waste water of aeration tank 11, these sediment can make the water viscosity of aeration tank 11 bottom increase, be unfavorable for the gas to carry out effective diffusion in the water when aeration, and for this reason, as the optimization, be provided with a plurality of wind scooper 2325 around head 2322 lateral wall equidistant on head 2322 lateral wall, the quantity of venthole 2324 is unanimous with wind scooper 2325's quantity in order to looks adaptation, and the position of venthole 2324 corresponds with wind scooper 2325's position, each wind scooper 2325 is annular array and distributes on head 2322 lateral wall and be the form of circling round, the venthole 2324 then is offered and link up wind scooper 2325 by gas outlet chamber 2323 towards wind scooper 2325 inner chamber, the cross section of venthole 2324 is the arc shape, and the axial direction that each venthole 2324 kept away from the one end of gas chamber 2323 is tangent to head 2322 lateral wall respectively, so that the high-pressure air current lets in the gas chamber 2323 and forms high-pressure air current when the output through air outlet 2324, make whole wind scooper 2322 rotate under the wind scooper 2322 and the position of wind scooper 2325, thereby the waste water can be more detained with the high-pressure bubble ratio in the waste water, the waste water can be increased by the waste water and the aeration effect is more in the vicinity of the waste water, the time of the aeration can be increased, and the waste water can be more than the aeration bubble is more than the waste water, and more than can be fully more than the aeration effect. The side of the air guide cover 2325 away from the head 2322 is arranged in an arc shape along the side away from the outlet of the air outlet 2324 towards the head 2322, so that resistance generated between the air guide cover 2325 and waste water during rotation is reduced, and the air guide cover 2325 can be replaced by fan blades. The output end of the air outlet 2324 is arranged at the side of the head 2322, so that sediment in the wastewater can be prevented from being blocked due to the sediment to a great extent.

Preferably, the base 2321 includes an inner tube 23211 arranged along the vertical direction and having a bottom end connected to and communicated with the aeration tube 231, a fixing sleeve 23212 provided on the outer wall of the inner tube 23211 by a fixing sleeve 23212, a sliding sleeve 23213 sliding and sleeved on the inner tube 23211, and a spring 23214 provided between the fixing sleeve 23212 and the sliding sleeve 23213, the head 2322 is coaxial with the sliding sleeve 23213 and the inner tube 23211, a sliding groove is provided on the bottom surface of the head 2322 to be provided on the inner tube 23211 by a sliding sealing sleeve, so that a sealed and relatively sealed space can be formed between the inner tube 23211 and the sliding groove, avoiding the gas leakage from affecting the gas pressure. The air outlet holes 2324 are communicated with the inner cavity of the sliding groove, so that the air in the inner pipe 23211 can be sequentially output through the sliding groove and the air outlet holes 2324, the head 2322, the inner pipe 23211, the fixed sleeve 23212 and the sliding sleeve 23213 are all cylindrical and coaxially distributed, the bottom surface of the head 2322 is rotationally connected with the top surface of the sliding sleeve 23213, a circular ring groove is arranged on the top surface of the sliding sleeve 23213 through arranging a circular ring-shaped sliding rail on the bottom surface of the head 2322, the sliding rail is in sliding clamping connection with the circular ring groove, the rotary connection and the coaxiality between the head 2322 and the sliding sleeve 23213 are realized, so that the head 2322 can rotate along the circumferential direction (namely the circumferential direction) relative to the sliding sleeve 23213, a sealed bearing may also be provided directly between the head 2322 and the sleeve 23213 to provide a rotational connection. The springs 23214 are arranged in a plurality of annular arrays around the circumference of the inner tube 23211 and distributed between the fixed sleeve 23212 and the movable sleeve, and two ends of each spring 23214 are fixedly connected to the fixed sleeve 23212 and the sliding sleeve 23213 respectively. When gas is conveyed into the aeration pipe 231, the sliding sleeve 23213 and the head 2322 slide along the axial direction of the inner pipe 23211 towards the side far away from the aeration pipe 231, so that the top end of the inner pipe 23211 is gradually far away from the top surface of the sliding groove, until the gas outlet hole 2324 is not blocked, the sliding groove and the inner cavity of the inner pipe 23211 are jointly enclosed to form the gas outlet cavity 2323, the gas is output from the gas outlet hole 2324 and does not impact the head 2322 any more, and the sliding of the head 2322 and the sliding sleeve 23213 relative to the inner pipe 23211 is stopped and kept at the current position; At this time, the spring 23214 is in a stretched state, and the gas is flushed out of the gas outlet 2324 to impact the waste water so that the head 2322 rotates. When the gas delivery into the aeration pipe 231 is stopped, the head 2322 loses the impact of the gas, the spring 23214 rebounds and contracts to drive the head 2322 and the sliding sleeve 23213 to slide towards the side of the aeration pipe 231 until the spring 23214 is retracted to a normal state, and the inner pipe 23211 plugs each air outlet hole 2324 to prevent negative pressure possibly generated in the aeration pipe 231 from sucking waste water into the aeration pipe 231 through the air outlet holes 2324 to pollute the aeration pipe 231. The rotating head 2322 can prevent sediment in the wastewater from accumulating at the aeration head 232 to a certain extent, and the air outlet 2324 is blocked from the side.

In this embodiment, the cover 3 is made of a transparent material, and the transparent material enables sunlight to irradiate into the isolated space 31, so that the planting unit 5 performs photosynthesis, and meanwhile, a worker can easily view the situation in the isolated space 31 through the cover 3. The sun shining lamp can be directly arranged in the cover body 3 to ensure the sun shining condition of the planting unit 5 for photosynthesis, so that the cover body 3 made of transparent materials can not be arranged. Preferably, the cover 3 is made of sound absorbing materials, noise pollution exists in the whole process of running sound and waste water flowing of all facility equipment and contact of the aeration mechanism 23 and waste water when the aeration system is used for treating waste water, and noise is isolated while harmful gas is isolated, so that the environment outside the cover 3 is more comfortable.

The cover body 3 is provided with a plurality of air suction channels 32 which are distributed in a tree shape, the input ends of the air suction channels 32 are communicated with the isolated space 31 towards the inside of the cover body 3, the output ends of the air suction channels 32 are converged in a main channel 321 and are communicated with gas recovery treatment, so that the gas recovery treatment unit can suck the gas in the isolated space 31 through the air suction channels 32, the isolated space 31 can be ensured to form a space which can isolate harmful gas and can also form a space for workers to safely stay in, thereby avoiding the harmful gas from accumulating in the isolated space 31 to damage various facility equipment and ensuring the safety of the facility equipment.

The gas recovery processing unit comprises an air extraction mechanism and a processing mechanism which are sequentially connected, wherein the input end of the air extraction mechanism is connected with the main channel 321, the output end of the processing mechanism is connected with the ozone oxidation tank 12 through a third pipeline 463, and the air extraction mechanism operates to extract the gas in the isolated space 31 through an air suction pipeline, so that the purpose of exhausting the harmful gas in the isolated space 31 is achieved; the treatment mechanism is used for treating the sucked harmful gas, so that the harmful gas is prevented from being directly discharged to harm the environment.

The air extraction mechanism comprises a third fan 41 arranged outside the cover body 3, the input end of the third fan 41 is connected to the main channel 321 through a fourth pipeline 42, the output end of the third fan 41 is connected to the processing mechanism through a fifth pipeline 43, and the input ends of the first fan 4541, the second fan 21 and the third fan 41 are both air suction ends and air outlet ends. After the third fan 41 operates, the main channel 321 enables each air suction channel 32 to start to uninterruptedly suck the gas in the isolated space 31, and each air suction channel 32 distributed in a tree structure enables the third fan 41 to suck the gas in all directions, so that the exhaust effect of the harmful gas in the cover body 3 is ensured.

The treatment mechanism comprises a shell 44, a combustion part 45 arranged on the shell 44 and communicated with the fifth pipeline 43, a filtering part 46 arranged on the shell 44 and communicated with the output end of the combustion part 45, and a heat recovery part 47 arranged on the shell 44, wherein the third fan 41 extracts harmful gases mixed in the isolated space 31 and then conveys the harmful gases into the combustion part 45, and the combustion part 45 is used for burning the gases conveyed by the third fan 41, so that most of the harmful gases such as alkanes such as methane and organic matters such as alcohols are directly burned and converted into harmless matters such as carbon dioxide and water, and the generated water is directly burned and evaporated by flame without worry about residue. The filtering portion 46 further filters the burned gas, especially for some harmful gases generated at high temperature, such as carbon oxides, and unburned harmful gases, such as benzene, nitrogen oxides, sulfides, etc., and the output end of the filtering portion 46 is communicated with the ozone oxidation tank 12 through the third pipeline 463, and the filtered harmful gases which are not treated are further purified by the ozone oxidation tank 12, so that triple purification of harmful substances is realized, each purification mode is different, the purpose of purifying different harmful gases can be achieved, and the harm caused by direct discharge of the harmful gases is avoided. The heat recovery unit 47 is used for exchanging heat to the combustion unit 45 and reducing the temperature of the gas after combustion when the combustion unit 45 is in combustion, and if the gas after combustion passes through the filtering unit 46 directly, the high temperature will not only affect the effect of the filtering unit 46, but also shorten the service life of the filtering unit 46, and the heat recovery unit 47 can reduce the temperature of the harmful gas while the combustion unit 45 is in combustion, so that the problem is avoided to a certain extent. The output end of the heat recovery part 47 is connected to the first branch pipe 221 through a second pipe 473, so that the heat exchanged high temperature gas can sequentially pass through the second pipe 473 and the first branch pipe 221 to enter the aeration pipe 231 to be output from the aeration head 232, and the high temperature gas can raise the temperature of the wastewater near the aeration head 232, and can raise the activity of microorganisms in the wastewater.

The combustion section 45 includes a combustion chamber 451 formed inside the housing 44, a gas delivery section 452 provided on the housing 44 and having an output end communicated into the combustion chamber 451 for delivering natural gas into the combustion chamber 451, a spark plug 453 provided at the output end of the gas delivery section 452, and a blowing section 454 for delivering air into the combustion chamber 451, the combustion chamber 451 having a first gas inlet 441 communicated with the fifth duct 43 and a first gas outlet 442 communicated with the filter section 46, a first valve 443 provided at the first gas outlet 442 to open and close a passage between the combustion chamber 451 and the filter section 46; harmful gas enters the combustion chamber 451 through the first gas inlet 441, and after a certain amount of harmful gas is injected, the gas delivery portion 452 operates to inject natural gas into the combustion chamber 451, and the amount of harmful gas can be calculated by setting a sensor to detect the gas pressure in the combustion chamber. Meanwhile, the air supply part 454 is operated to convey air into the combustion chamber 451, the spark plug 453 is started to ignite the natural gas at the beginning of the operation of the gas conveying part 452, so as to ignite the harmful gas in the combustion chamber 451, so that the harmful gas is burnt and converted into harmless substances, and before the combustion in the combustion chamber 451 is completed, the first valve 443 is closed, so that the combustible harmful gas is prevented from being unburned.

Specifically, the housing 44 and portions thereof are formed of a high temperature, corrosion resistant, chemically stable metal, such as steel, steel alloys, and the like. The gas delivery unit 452 includes a sixth pipe 4522 for communicating external natural gas, a pressure regulating valve 4521 provided in the sixth pipe 4522, a natural gas chamber 4523 formed in the housing 44 and communicating with the sixth pipe 4522, a seventh pipe 4524 for communicating with the natural gas chamber 4523, a flow regulating valve 4525 provided in the seventh pipe 4524, and a gas outlet pipe 4526 provided at an output end of the seventh pipe 4524, the pressure regulating valve 4521 regulating the pressure of the natural gas so that the liquefied natural gas can be gasified and input into the natural gas chamber 4523, the flow regulating valve 4525 regulating the amount of the natural gas to be output so as to prevent excessive natural gas from entering the combustion chamber 451 to cause knocking. A placing groove is concavely arranged at the bottom of the combustion chamber 451, a high-temperature resistant supporting block is arranged in the placing groove, and an air outlet pipe 4526 is arranged on the supporting block. The air outlet pipe 4526 is a copper pipe wound in a spiral shape, and the spark plug 453 is arranged at the bottom of the combustion chamber 451 and is positioned at the side of the air outlet pipe 4526 for igniting the natural gas at the air outlet pipe 4526. The second valve 444 is disposed at the first air inlet 441, and the second valve 444 is opened before the combustion of the combustion chamber 451 and closed when the combustion is performed in the combustion chamber 451, so as to avoid that a great amount of harmful gas which can be combusted is discharged into the filtering portion 46 after the combustion is completed without being combusted. The spark plug 453 is a prior art and is not described in detail herein.

The air supply part 454 comprises a first fan 4541 arranged outside the shell 44 and an air inlet channel 4542 formed in the shell 44, wherein the input end of the air inlet channel 4542 is connected with the output end of the first fan 4541, and a third valve 4543 is arranged on the air inlet channel 4542 and used for opening and closing the third valve 4543; the output end of the air inlet channel 4542 is divided into two parts which are respectively communicated with the combustion chamber 451 and the heat recovery part 47 so as to convey air into the combustion chamber 451 when the combustion chamber 451 needs to ignite harmful gas, thereby ensuring that the gas in the combustion chamber 451 can be combusted and ensuring that the air pressure in the combustion chamber 451 is stable; at the same time, air is supplied to the heat recovery portion 47 to exchange heat with the heat in the combustion chamber 451, thereby prolonging the service lives of the combustion chamber 451 and the filtering portion 46.

The filtering part 46 comprises a filtering chamber 461 formed in the shell 44 and a filtering net 462 arranged in the filtering chamber 461 and dividing the filtering chamber 461 into a transition chamber 4611 and a filtering chamber, the filtering chamber 461 is provided with a second air inlet which is respectively arranged at two sides of the filtering net 462 and is communicated with the first air outlet 442 and a second air outlet 445 which is respectively communicated with the ozone oxidation pond 12, the transition chamber 4611 is positioned at one side close to the second air inlet, the filtering chamber is positioned at one side close to the second air outlet 445, and the second air inlet and the first air outlet 442 are the same part; the filter chamber is filled with filter material 4612, and the gas after combustion in the filter chamber 461 is cooled before entering the filter chamber through the first gas outlet 442, so that the harmful gas is primarily cooled by the heat recovery portion 47 and then is cooled again to reduce the temperature thereof, and the filter material 4612 can filter impurities generated by combustion therein until being discharged into the ozone maintenance pool through the third pipeline 463. As another embodiment, after the filter screen 462 is separated from the transition chamber 4611 by a partition on a side close to the second air inlet, the partition forms a sealed chamber in the transition chamber 4611, the transition chamber 4611 is filled with circulating water, the first air outlet 442 is provided with an eighth pipeline in a sealing manner, an input end of the eighth pipeline is connected to the first air outlet 442, and an output end of the eighth pipeline extends into the transition chamber 4611 and is distributed in the transition chamber 4611 in a bending manner until the eighth pipeline is connected to the partition, and the eighth pipeline is communicated with the filter chamber to further cool the burnt gas.

The heat recovery part 47 includes a heat exchange chamber 471 which is formed in the housing 44 and is arranged around the combustion chamber 451 and is independent of the combustion chamber 451, the heat exchange chamber 471 has a third air inlet and a third air outlet 446, the third air outlet 446 is connected with the second pipe 473 to be able to convey high temperature gas into the aeration tank 11, two output ends of the air inlet channel 4542 are respectively connected with the combustion chamber 451 and the third air inlet, the first fan 4541 transfers air into the heat exchange chamber 471 through the air inlet channel 4542, and then the air exchanges heat in the combustion chamber through absorbing heat of the housing 44 part separated between the combustion chamber 451 and the heat exchange chamber 471, thereby accelerating the temperature reduction in the combustion chamber and achieving the effect of reducing the gas in the combustion chamber 451.

Another embodiment of the heat recovery section 47: the heat recovery part 47 comprises a ninth pipeline made of high temperature resistant and corrosion resistant metal materials, the input end of the ninth pipeline is connected to the output end corresponding to the air inlet pipeline, the output end of the ninth pipeline is arranged in the inner wall of the combustion chamber 451, the end of the output end of the ninth pipeline penetrates out of the combustion chamber 451 and the shell 44 to be connected with the second pipeline 473, and the ninth pipeline can directly absorb heat in the combustion chamber 451 through the heating pipe wall when in combustion.

Since the high temperature gas of the second pipe 473 is connected to the first branch pipe 221, when the second fan 21 is operated and then blows air into the first branch pipe 221, the air of the first branch pipe 221 may enter into the second pipe 473 to affect the delivery of the high temperature gas and the delivery of the air in the first branch pipe 221, for this purpose, preferably, a venturi 472 is provided at the connection between the first branch pipe 221 and the second pipe 473 along the delivery direction of the first branch pipe 221, the venturi 472 has an inlet section, a contraction section, a throat section and a diffusion section sequentially from the input end of the first branch pipe 221 to the output end of the first pipe 221, and the output end of the second pipe 473 is connected to and communicated with the throat section of the venturi 472, so that when the second fan 21 is operated and delivers air into the first branch pipe 221, the venturi effect is generated after the air enters into the inlet section and the contraction section, i.e. the flow rate at the throat section increases, so that a certain negative pressure area is formed at the throat section to reduce the pressure, and the negative pressure of the second pipe 473 connected to the throat section is smoothly led to the second pipe 473, thereby avoiding the negative pressure of the air flowing into the throat section to the second pipe 473 from affecting the aeration.

The planting unit 5 includes setting up the planting groove 51 in aeration tank 11 top border position department, fill planting soil 52 in planting groove 51 and plant the green 53 in planting soil 52, planting groove 51 and be located planting soil 52's bottom and spread and have one deck by a plurality of particle diameter more than 1.5cm ventilative matrix 54 each ventilative layer that ventilative matrix 54 laid and form each ventilative matrix 54 between have great clearance, the particle diameter is bigger, the bigger the clearance is just bigger, the while of increase planting soil 52 gas permeability, make the root system of green 53 can pass ventilative matrix 54 spare clearance, and set up a plurality of perforation 55 in the intercommunication aeration tank 11 on the bottom surface in planting groove 51, so that plant root system passes planting groove 51 below through perforation 55, and planting groove 51 sets up in aeration tank 11's top border department, plant root system can direct contact waste water after wearing out planting groove 51 bottom, and plant root system then can absorb some harmful substance wherein, while reducing waste water harmful substance, provide nutrition for the plant, so that plant can provide more oxygen for isolated space 31. It should be noted that if the ventilation layer is not provided, although the plant root system still can pass through to the bottom of the planting groove 51, water is required for survival of the plant, after the water is poured into the planting soil 52, the water is accumulated at the bottom of the planting groove 51 under the action of gravity, which easily causes that the plant root system at the bottom of the planting groove 51 is difficult to breathe and weak, even rotten, which causes that only a very small number of plant root systems can pass out of the perforation 55, and a small number of root systems which pass out of the perforation 55 are weak due to lack of oxygen, and the absorption capacity of the plant root system to harmful substances is greatly reduced.

One embodiment of the aeration system of the present invention operates as follows: the second valve 444 and the fourth valve 223 are both opened, the second fan 21 is operated to convey air into the aeration tank 11 to perform aeration treatment on the wastewater, meanwhile, the first valve 443, the third valve 4543, the pressure regulating valve 4521 and the flow regulating valve 4525 are all closed, the third fan 41 of the air pumping mechanism is operated to suck the gas in the isolated space 31 through the air suction channel 32 and convey the sucked harmful gas into the combustion chamber 451 through the fifth pipeline 43, when the third fan 41 conveys a certain time or a certain amount of gas into the combustion chamber 451, the operation is stopped, the second valve 444 and the first valve 443 are closed, the third valve 4543, the pressure regulating valve 4521 and the flow regulating valve 4525 are all opened, the spark plug 453 is operated to ignite the natural gas, the first fan 4541 is operated to convey air into the heat exchange chamber 471 and the combustion chamber 451 respectively, thereby igniting the toxic gas, the space in the heat exchange chamber 471 is cooled, and the high-temperature gas after heat exchange is conveyed to the first branch pipe 221 through the second pipeline 473 to be output into the aeration tank 11; after the combustion chamber 451 is burned for a certain period of time, the pressure regulating valve 4521, the flow rate regulating valve 4525 and the third valve 4543 are closed, the first fan 4541 is stopped, the first valve 443 is opened to allow the burned gas to be discharged into the filtering portion 46 for filtering and to be delivered into the ozone oxidation tank 12 through the third pipe 463; finally, the first valve 443 is closed and the second valve 444 is opened until the next combustion event.

Claims (7)

1. An aeration system, comprising:

The top of the tank body is opened, and the tank body comprises an aeration tank and an ozone oxidation tank which are arranged separately;

An aeration unit for delivering gas into the aeration tank;

The cover body is made of transparent and sound-absorbing materials and is covered above the tank body to form an isolated space, a plurality of air suction channels distributed in a tree shape are formed on the cover body, and the input ends of the air suction channels are communicated with the isolated space, and the output ends of the air suction channels are converged in a main channel; and

The gas recovery treatment unit comprises an air extraction mechanism and a treatment mechanism which are sequentially connected, wherein the input end of the air extraction mechanism is connected with the main channel, and the output end of the treatment mechanism is connected with the ozone oxidation pond;

The treatment mechanism comprises a combustion part communicated with the output end of the air extraction mechanism and a filtering part with the input end communicated with the output end of the combustion part, and the output end of the filtering part is communicated with the ozone oxidation pond;

the treatment mechanism further comprises a shell, and the combustion part is arranged on the shell;

The combustion part comprises a combustion chamber formed in the shell, a gas conveying part, a spark plug and an air supply part, wherein the gas conveying part is arranged on the shell, the output end of the gas conveying part is communicated into the combustion chamber and is used for conveying natural gas into the combustion chamber, the spark plug is arranged at the output end of the gas conveying part, the air supply part is used for conveying air into the combustion chamber, the combustion chamber is provided with a first air inlet communicated with the air suction mechanism and a first air outlet communicated with the filtering part, and a first valve is arranged at the first air outlet;

the treatment mechanism further comprises a heat recovery part arranged on the shell;

the heat recovery part comprises a heat exchange chamber which is formed in the shell and is arranged in a surrounding manner in the combustion chamber and is independent of the combustion chamber, the heat exchange chamber is provided with a third air inlet and a third air outlet, and the third air outlet is connected with the aeration unit so as to be capable of conveying high-temperature gas into the aeration tank;

The air supply part comprises a first fan arranged outside the shell and an air inlet channel formed in the shell, wherein the input end of the air inlet channel is connected with the output end of the first fan, and the output end of the air inlet channel is divided into two parts which are respectively communicated with the combustion chamber and the third air inlet.

2. An aeration system according to claim 1, wherein: the filter part is including forming in the casing filter chamber and setting up in the filter chamber and separating into transition chamber and filter chamber's filter screen have the second air inlet of the intercommunication first gas outlet of branch setting in the filter screen both sides and the second gas outlet of intercommunication ozone oxidation pond on the filter chamber, the transition chamber is located and is close to second air inlet one side, the filter chamber is located and is close to second gas outlet one side the filter chamber intussuseption is filled with the filter material.

3. An aeration system according to claim 1, wherein:

The aeration unit comprises a second fan, a first pipeline and an aeration mechanism, wherein the second fan is arranged outside the cover body, the input end of the first pipeline is connected with the output end of the second fan, the aeration mechanism is arranged at the bottom of the aeration tank, the output end of the first pipeline is divided into two parts, namely a first branch pipe and a second branch pipe, the first branch pipe is connected with the aeration mechanism, a venturi tube is arranged on the first branch pipe, and the second branch pipe extends into an isolated space;

The third air outlet is connected to the first branch pipe through a second pipeline, and the output end of the second pipeline is connected to the throat section of the venturi tube.

4. An aeration system according to claim 3, wherein:

the aeration mechanism comprises an aeration pipe which is arranged at the bottom of the aeration tank and communicated with the first branch pipe, and a plurality of aeration heads which are arranged on the aeration pipe at equal intervals along the length direction of the aeration pipe and communicated with the inner cavity of the aeration pipe;

The aeration head comprises a base connected to the aeration pipe and a head which is arranged on the base in a rotating manner so as to rotate along the circumferential direction of the base, a sealed air outlet cavity which is communicated with the inner cavity of the aeration pipe is formed between the base and the head, a plurality of air guide covers are arranged on the outer side wall of the head at equal intervals around the head, a plurality of air outlet holes which are adapted to the communicated air outlet cavity of the air guide covers and penetrate the air guide covers outwards are formed in the head, and the axial direction of one end of the air outlet hole away from the air outlet cavity is tangential to the head.

5. An aeration system according to claim 4, wherein: the base comprises an inner pipe, a fixed sleeve, a sliding sleeve and a spring, wherein the inner pipe is arranged along the vertical direction, the bottom end of the inner pipe is connected and communicated with an aeration pipe, the fixed sleeve is fixedly sleeved on the outer wall of the inner pipe, the sliding sleeve is sleeved on the inner pipe in a sliding mode, the spring is arranged between the fixed sleeve and the sliding sleeve, the head is coaxial with the sliding sleeve and the inner pipe, a sliding groove is formed in the bottom surface of the head to be sleeved on the inner pipe in a sliding sealing mode, the air outlet hole is communicated with the inner cavity of the sliding groove, and the bottom surface of the head is rotatably connected to the top surface of the sliding sleeve; when the gas is conveyed into the aeration pipe, the sliding sleeve and the head part slide along the axial direction of the inner pipe towards one side far away from the aeration pipe, the spring is in a stretching state, the sliding groove and the inner cavity of the inner pipe are jointly enclosed to form the gas outlet cavity, and when the gas is not conveyed into the aeration pipe, the spring is in a normal state, and the inner pipe blocks the gas outlet hole.

6. An aeration system according to claim 1, wherein: the planting unit is arranged in the cover body; the planting unit comprises a planting groove arranged at the edge position of the top of the aeration tank, planting soil filled in the planting groove and green planting planted in the planting soil, a plurality of breathable matrixes with particle sizes larger than 1.5cm are paved at the bottom of the planting groove and positioned in the planting soil, and a plurality of perforations communicated with the aeration tank are formed in the bottom surface of the planting groove.

7. A power station water pollution treatment system is characterized in that: the device comprises a primary sedimentation tank, a neutralization tank, a sedimentation tank, a flocculation tank, a clarifier and a dosing mechanism which are sequentially arranged, wherein the output end of the clarifier is respectively connected with a filter press for treating sludge and a mixing tank for treating wastewater, the output end of the mixing tank is connected with a clean water tank, and the dosing mechanism is used for adding corresponding medicaments to each part; the primary sedimentation tank comprising an aeration system according to any one of claims 1 to 6.