CN108640264A - A kind of aerating system and aeration method in pond - Google Patents

Abstract

The present invention relates to a kind of aerating system in pond and aeration methods, the outlet of each roots blower is separately installed with fan outlet tube, steam supply valve is installed at the top of fan outlet tube, the outlet of steam supply valve is connected with air supply header and the gas supply standpipe upwardly extended, the top of gas supply standpipe is connected with along the horizontal-extending gas supply transverse tube of sink top, the more gas manifolds extended to basin bottom are connected on gas supply transverse tube, the lower end of each gas manifold is connected with the air inlet of corresponding aeration head respectively；The stage casing of fan outlet tube is connected with horizontal-extending blow-down pipe, and the outlet of blow-down pipe is equipped with blow valve.When the aeration carried out to pond, blow valve is first opened before starting, starts wind turbine afterwards, opens steam supply valve after wind turbine full speed, closes blow valve to pond gas supply；Blow valve release is first opened when shutdown, then blowing-out machine, turn off steam supply valve and blow valve.The aerating system and aeration method can make wind turbine zero load start and unload, and avoid by moisture attack, and service life is long.

Description

A kind of aerating system and aeration method in pond

Technical field

The present invention relates to a kind of aerating systems in pond, it is intended to which the dissolved oxygen for increasing water body, the invention further relates to a kind of water The aeration method in pond belongs to aeration facility technology field.

Background technology

The processing of high concentrated organic wastewater generally includes Aerobic biological process process, and activated sludge process is a kind of most common Aerobic biological process for treating, the organic nutrient substance in activated sludge in complicated microorganism and waste water form complicated food Chain.Take on purification task at first is heterotrophic bacteria and septic fungi, and bacterium especially spherical bacteria plays a part of most critical, The activated sludge of excellent operating is the zoogloea being made of by skeleton of der Pilz spherical bacterium.Settleability is good, with activated sludge Normal operation, bacterium mass propagation, start grow protozoan, be predator of bacterium.

The dissolved oxygen concentration of activated sludge is advisable with 2-4mg/L, and the effect of aerating system is to the micro- life of aerobic pond supply Oxygen necessary to object growth and decomposing organic matter, and play mixing, so that activated sludge is come into full contact with organic matter.

Since ground or more is usually built in aerobic pond in, pond is deep up to 5 meters or more, and basin bottom has been evenly arranged multiple exposures Gas head, compressed air hose enters in pond from pond tip cutting and extends to basin bottom to be connected with each aeration head.Compressed air gas source is logical Often from roots blower room, sound insulation measure, the compressed air of roots blower room output are built on the ground and taken in roots blower room Air pressure needs to reach 0.5MPa or more.

Roots blower category positive displacement wind turbine is performed relative motion in cylinder using two lobed rotors to compress and convey The rotary compressor of gas.Two impellers are constant in centre-to-centre spacing, no matter two impellers rotate to where, impeller with Between impeller, certain minimal clearance, usual gap can be kept between impeller and cylinder wall is only 0.08mm~0.2mm, from And ensure the leakage of gas within the allowable range.Since the compression ratio of roots blower is bigger, air is compressed by roots blower Afterwards, temperature rise ratio is larger, and the high temperature resistant requirement of oil sealing and bearing to wind turbine is relatively high.

When stopping transport, activated sludge can be deposited in aerobic tank bottom and bury aeration head for aeration tank, and the flocculation of Qian Dao workshop sections is anti- The sediment that should be generated also can partly drift about into aerobic tank, and when stoppage in transit can also be deposited in aerobic tank bottom.Aerobic tank opens again Used time needs enough compressed air pressures to blow afloat the sludge being covered on aeration head and be uniformly suspended in water body.Roots's wind Machine on startup, if directly supplied to underwater, it is bigger to start load；And before aeration head outlet, not yet due to air Realize circulation, the air-flow update of roots blower outlet is slow, and temperature rises higher, on the one hand be easy to cause the ablation of oil sealing, at bearing Butter be also susceptible to it is dry and hard, if operative employee will cause the butter of bearing can not add, quickly can without correct processing in time Cause equipment damage；On the other hand, when temperature rises excessively high, the gap between the sealing rib and another impeller of an impeller becomes It is small, it is susceptible to the phenomenon that sealing rib is scratched brighten, greatly reduces the compression performance of wind turbine.

When roots blower is shut down, if on-load is shut down, on the one hand it be easy to cause roots blower and is damaged, on the other hand, Since the high-temperature gas in compressed air hose does not empty, gas supply transverse tube is again closer apart from the water surface, and the water surface compares roots blower again Several meters are higher by, after high-temperature gas cools down, a small amount of water is easy to enter gas supply transverse tube under siphonage, is easily flowed into along pipeline In roots blower, equipment corrosion and damage is caused.Even if no water is because siphon enters gas supply transverse tube, the water temperature of aeration tank is relatively high, The evaporation capacity of numerous gas manifolds is also bigger, and leave unused more long afterwards, and moist steam, which enters in gas supply transverse tube to accumulate, is easy moisture condensation, Equally it be easy to cause the corrosion and damage of roots blower.

The construction of roots blower room and aerating system does not solve problem above at present, and the appearance of problem above is often wanted By one section of longer process, user generally can not Correct Analysis go out the real cause of damage, often generally return when something goes wrong It is improper in misoperation or lubrication, maintaining to censure.When building roots blower room, it is typically provided with spare roots blower, it can It is spare when for equipment damage.The roots blower of damage usually requires to replace impeller, oil sealing and bearing, due between impeller, impeller The required precision of gap very little between cylinder body, assembly is again high, and most users generally can not voluntarily be completed to replace, can only Integral replacing head causes prodigious use cost.

Invention content

The primary purpose of the present invention is that overcoming problems of the prior art, a kind of aerating system in pond is provided, Roots blower zero load can be made to start and unload, and avoided by moisture attack, service life is long.

In order to solve the above technical problems, the aerating system in a kind of pond of the invention, including roots blower 1 and be located at pond The air inlet of multiple aeration heads 3 of bottom, each roots blower 1 is separately installed with silencer 2, the outlet difference of each roots blower 1 The fan outlet tube G1 upwardly extended is installed, steam supply valve V2, the outlet of steam supply valve V2 are installed at the top of fan outlet tube G1 It is connected with air supply header G2, air supply header G2 is connected with the gas supply standpipe G3 upwardly extended, supplies the top of standpipe G3 and along water The gas supply transverse tube G5 that pond top horizontal extends is connected, and the more gas manifolds extended to basin bottom are connected on gas supply transverse tube G5 The lower end of G6, each gas manifold G6 are connected with the air inlet of corresponding aeration head 3 respectively；The stage casing of fan outlet tube G1 is connected with water The flat blow-down pipe extended, the outlet of the blow-down pipe is equipped with blow valve V1.

Compared with the existing technology, the present invention achieves following advantageous effect：Hand may be used in blow valve V1 and steam supply valve V2 Dynamic electric dual-purpose valve can first open blow valve V1, then roots blower 1 is without any load before roots blower 1 starts In the case of start, after roots blower 1 reaches full speed, slowly open steam supply valve V2, after steam supply valve V2 is opened in place, then slowly close Close blow valve V1, compressed air enters air supply header G2 by steam supply valve V2, from air supply header G2 sequentially enter gas supply standpipe G3, Transverse tube G5 and gas manifold G6 is supplied, is finally discharged from aeration head 3, the activated sludge for being deposited in bottom of pond is blown afloat into simultaneously even suspension In water body.Before shutdown, blow valve V1 is first slowly opened, the high-temperature gas in each compressed air pipe is exhausted, waits for blow valve V1 is opened in place, and roots blower 1 is shut down after realizing complete off-load, and it is total with gas supply to be then shut off steam supply valve V2 partition roots blowers 1 The contact of pipe G2, closing blow valve V1 prevents the toys such as mouse from entering equipment inner cavity from blow-down pipe, causes the accident.

As an improvement of the present invention, the inlet end of gas supply transverse tube G5 is equipped with check-valves V3, the outlet installation of check-valves V3 There are the dilatation pipe G4 with gas supply transverse tube coaxial line, the diameter of dilatation pipe G4 to be more than the diameter of gas supply transverse tube G5, the bottom of dilatation pipe G4 Portion is connected with the bleeder pipe G7 extended downwardly, and the lower end of bleeder pipe G7 is equipped with bleeder valve V4.When work, check-valves V3 can be protected Demonstrate,prove the one-way flow of compressed air；The case where check-valves V3 long-time services are possible to be not closed completely, when roots blower 1 shuts down Afterwards, if a small amount of flow enters in gas supply transverse tube G5 when flow to the directions check-valves V3, dilatation pipe G4 can be arrived first at, due to expansion The diameter for holding pipe G4 is more than the diameter of gas supply transverse tube G5, and flow can collect in the bottom of dilatation pipe G4, and be downwardly into bleeder pipe It is kept in G7, periodically opens bleeder valve V4 and discharged, it can be ensured that flow will not enter in roots blower 1, it is ensured that equipment is pacified Entirely.

As a further improvement on the present invention, roots blower 1 is driven by blower motor M1, and blower motor M1's is controlled by wind Machine frequency-variable controller VF1 and current supply circuit are in series with the first circuit breaker Q F1 and the first electrothermal relay FR1；Blow valve V1 is by being vented The current supply circuit of the M2 drivings of valve motor, blow valve motor M2 is controlled by the second circuit breaker Q F2, and the rotating forward of blow valve motor M2 supplies The main contact of first contactor KM1 is in series in electrical circuit, being in series with second in the reversion current supply circuit of blow valve motor M2 connects The main contact of tentaculum KM2；Steam supply valve V2 is driven by steam supply valve motor M3, and the current supply circuit of steam supply valve motor M3 is controlled by third and breaks Road device QF3, and the main contact of third contactor KM3, steam supply valve motor are in series in the rotating forward current supply circuit of steam supply valve motor M3 The main contact of the 4th contactor KM4 is in series in the reversion current supply circuit of M3.After first circuit breaker Q F1 closes a floodgate, by fan frequency conversion The rotating speed of controller VF1 control blower motors M1, the first electrothermal relay FR1 carry out overcurrent protection to blower motor M1.Second After circuit breaker Q F2 closes a floodgate, when the main contact of first contactor KM1 is closed, blow valve motor M2 is rotated forward, and blow valve V1 is gradual It opens；When the main contact of second contactor KM2 is closed, the reversion of blow valve motor M2, blow valve V1 is progressively closed off.Third is disconnected After road device QF3 closes a floodgate, when the main contact of third contactor KM3 is closed, steam supply valve motor M3 is rotated forward, and steam supply valve V2 is gradually beaten It opens, when the main contact of the 4th contactor KM4 is closed, steam supply valve motor M3 reversions, steam supply valve V2 is progressively closed off.

As a further improvement on the present invention, stop button QB1, first are in series between the firewire and zero curve of control loop The normally closed interlock of electrothermal relay FR1, the coil of start button SB1 and the first relay KA1, the first of the first relay are normally opened tactile Head KA1-1 is attempted by the both ends of start button SB1；Second normally open contact KA1-2 of the first relay successively with the second relay Third normally closed interlock KA2-3, second contactor KM2 normally closed auxiliary contact and first contactor KM1 coil series connection after connect It is connected between the firewire of control loop and zero curve；Blow valve reaches an inductive switch SQ1 and connects with the coil of the second relay KA2 It is connected between the firewire of control loop and zero curve afterwards；First normally open contact KA2-1 of the second relay and the first relay It is connected between the firewire of control loop and zero curve after the series connection of the coil of third normally open contact KA1-3 and third relay KA3, the First normally open contact KA3-1 of three relays is attempted by the first both ends normally open contact KA2-1 of the second relay, third relay The second normally open contact KA3-2 be connected to the start end of fan frequency conversion controller VF1.After pressing start button SB1, the first relay The coil of device KA1 obtains electric, the first normally open contact KA1-1 actuation self-insurances of the first relay, and the second of the first relay is normally opened tactile It is electric that head KA1-2 closures make the coil of first contactor KM1 obtain, when the main contact of first contactor KM1 is closed, blow valve motor M2 It rotates forward, blow valve V1 is gradually opened；The normally closed auxiliary contact of second contactor KM2 realizes that second contactor KM2 is contacted with first The interlocking of device KM1；When the coil of second contactor KM2 obtains electric, the normally closed auxiliary contact of second contactor KM2 disconnects, and first connects The coil of tentaculum KM1 can not obtain electric.When blow valve V1 is reached, blow valve reaches an inductive switch SQ1 and is closed, the second relay The coil of device KA2 obtains electric, and the third normally closed interlock KA2-3 of the second relay is disconnected, the coil losing electricity of first contactor KM1, the The main contact of one contactor KM1 disconnects, and blow valve motor M2 stops.After blow valve V1 reaches position, the first of the second relay is normal Open contact KA2-1 is closed, and the coil of the first relay KA1 is in obtain electricity condition, the third normally open contact of the first relay at this time KA1-3 is in closed state, the coil of third relay KA3 obtain it is electric, the first normally open contact KA3-1 of third relay be attracted from It protects, the second normally open contact KA3-2 of third relay is closed, and fan frequency conversion controller VF1 control blower motors M1 starts.Such as This is realized before blower motor M1 starts, and first automatically open blow valve V1 makes blower motor M1 in unloaded situation in place Under, automatically into startup.

As a further improvement on the present invention, the third normally open contact KA3-3 and time relay KT1 of third relay It is connected between the firewire of control loop and zero curve after coil series connection；The timing closing normally open contact of time relay KT1 is successively With the normally closed interlock KA4-2 of the 4th relay, the coil of the normally closed auxiliary contact of the 4th contactor KM4 and third contactor KM3 Be connected between the firewire of control loop and zero curve after series connection, the normally opened self-keeping contact of third contactor KM3 be attempted by the time after The timing closing normally open contact both ends of electric appliance KT1；Steam supply valve reaches a coil string of inductive switch SQ3 and the 4th relay KA4 It is attempted by between the firewire of control loop and zero curve after connection.When blower motor M1 starts to start, the third of third relay is normally opened Contact KA3-3 is closed, the coil of time relay KT1 obtain it is electric, after blower motor M1 reaches full speed, time relay KT1's Timing closing normally open contact KT1-1 is closed, and the coil of third contactor KM3 obtains electric, the normally opened self-keeping contact of third contactor KM3 It is attracted self-insurance, when the main contact of third contactor KM3 is closed, steam supply valve motor M3 is rotated forward, and steam supply valve V2 is gradually opened, and is prepared It is supplied to pond.The normally closed auxiliary contact of 4th contactor KM4 realizes the interlocking of the 4th contactor KM4 and third contactor KM3； When the coil of 4th contactor KM4 obtains electric, the normally closed auxiliary contact of the 4th contactor KM4 disconnects, the coil of third contactor KM3 It can not obtain electric.When steam supply valve V2 is opened in place, steam supply valve reaches a contact closure of inductive switch SQ3, the 4th relay KA4 Coil obtain electric, the normally closed interlock KA4-2 of the 4th relay is disconnected, the coil losing electricity of third contactor KM3, third contactor When the main contact of KM3 disconnects, steam supply valve motor M3 stops.

As a further improvement on the present invention, the first normally open contact KA4-1 of the 4th relay successively with the 5th relay It is connected to control after the coil series connection of the normally closed interlock of KA5, the normally closed auxiliary contact of first contactor KM1 and second contactor KM2 Between the firewire and zero curve in circuit processed, the self-keeping contact of second contactor KM2 is attempted by the first normally open contact of the 4th relay The both ends KA4-1, blow valve close inductive switch SQ2 in place and are connected to control loop after connecting with the coil of the 5th relay KA5 Between firewire and zero curve.After steam supply valve V2 is opened in place, the first normally open contact KA4-1 of the 4th relay is closed, the second contact The coil of device KM2 obtains electric, and the self-keeping contact of second contactor KM2 is attracted self-insurance, and the main contact of second contactor KM2 is closed, puts The reversion of empty valve motor M2, blow valve V1 are progressively closed off；When blow valve V1 is closed in place, blow valve closes inductive switch in place The contact closure of SQ2, the coil of the 5th relay KA5 obtain electric, and the normally closed interlock disconnection of the 5th relay KA5 makes second contactor The coil losing electricity of KM2, blow valve motor M2 stop.When the coil of first contactor KM1 be in electricity condition when, first contactor The normally closed auxiliary contact of KM1 disconnects, and the coil of second contactor KM2 can not obtain electric.So realize 1 full-speed operation of roots blower And after steam supply valve V2 is opened in place, blow valve V1 is progressively closed off, and compressed air enters air supply header G2 by steam supply valve V2, from confession Gas manifold G2 sequentially enter gas supply standpipe G3, gas supply transverse tube G5 and gas manifold G6, are finally discharged, will be deposited in from aeration head 3 The activated sludge of bottom of pond blows afloat and is uniformly suspended in water body, into normal operation.

As a further improvement on the present invention, the of the 4th normally open contact KA3-4 of third relay and the first relay It is attempted by the second both ends normally open contact KA1-2 of the first relay after four normally closed interlock KA1-4 series connection, the 4th of the second relay the Normally closed interlock KA2-4 is attempted by the both ends third normally open contact KA1-3 of the first relay.In 1 operational process of roots blower, when by When lower stop button QB1, the 4th normally closed interlock KA1-4 of the coil losing electricity of the first relay KA1, the first relay KA1 is closed, The third normally open contact KA1-3 of first relay is disconnected, and the 4th normally closed interlock KA2-4 of the second relay is in closed state, The coil of third relay KA3 is set to be closed still in electricity condition, the 4th normally open contact KA3-4 of third relay is obtained；Blow valve V1 is closed, and the third normally closed interlock KA2-3 of the second relay is closed so that the coil of first contactor KM1 is again Must be electric, when the main contact of first contactor KM1 is closed, blow valve motor M2 is rotated forward, and blow valve V1 is gradually opened；Until blow valve V1 reaches position, and blow valve reaches an inductive switch SQ1 and is closed, and the coil of the second relay KA2 obtains electric, the third of the second relay Normally closed interlock KA2-3 is disconnected, the coil losing electricity of first contactor KM1, and the main contact of first contactor KM1 disconnects, blow valve electricity Machine M2 stops.After blow valve V1 reaches position, because the 4th normally closed interlock KA2-4 of the second relay is disconnected, the of the first relay Three normally open contact KA1-3 have been disconnected, and the coil losing electricity of third relay KA3, blower motor M1 is made to stop.It is thus achieved that in sieve Before thatch wind turbine 1 shuts down, first opens blow valve V1 and carry out off-load, it is ensured that roots blower 1 is shut down in the state of zero load. When blower motor M1 makes the normally closed interlock of the first electrothermal relay FR1 disconnect because of overcurrent, control system of the invention also can be true It protects blow valve V1 first to open, blow valve motor M2 stops after opening in place, equally ensure that roots blower 1 is uncharging state Lower shutdown.

As a further improvement on the present invention, the second normally open contact KA2-2 of the second relay successively with the first relay The 5th normally closed interlock KA1-5, the 5th normally closed interlock KA3-5 of third relay, the normally closed interlock of the 6th relay KA6, The firewire and zero of control loop is connected to after the coil series connection of the normally closed auxiliary contact and the 4th contactor KM4 of three contactor KM3 Between line, the first normally opened auxiliary contact KM4-1 of the 4th contactor is connected on the of the firewire of control loop and third relay Between the lower pile crown of five normally closed interlock KA3-5, steam supply valve closes inductive switch SQ4 in place connects with the coil of the 6th relay KA6 It is attempted by between the firewire of control loop and zero curve afterwards；Second normally opened auxiliary contact KM4-2 of the 4th contactor and the first relay It is attempted by second contactor KM2 after the 6th normally closed interlock KA3-6 series connection of the 6th normally closed interlock KA1-6 and third relay of device Self-keeping contact both ends.When blow valve V1 reaches position, the coil of the second relay KA2 obtains electric, while the line of third relay KA3 After circle dead electricity makes blower motor M1 stop, the second normally open contact KA2-2 of the second relay is closed, at this time the of the first relay 5th normally closed interlock KA3-5 of five normally closed interlock KA1-5 and third relay is in closed state, makes the 4th contactor KM4 Coil obtain electric, the first normally opened auxiliary contact KM4-1 of the 4th contactor is attracted self-insurance, and the main contact of the 4th contactor KM4 closes It closes, the M3 reversions of steam supply valve motor make steam supply valve V2 return to closed state, and after steam supply valve V2 is closed in place, steam supply valve pass is felt in place The contact closure of inductive switch SQ4, the coil of the 6th relay KA6 obtain electric, and the normally closed interlock of the 6th relay KA6 disconnects, and make the The main contact of the coil losing electricity of four contactor KM4, the 4th contactor KM4 disconnects, and steam supply valve motor M3 stops；Steam supply valve V2 is closed So that roots blower 1 is isolated with air supply header G2, avoids the operation for influencing adjacent roots blower；In the state of stopping transport long, Also roots blower 1 is avoided to be corroded by steam in supply air line.After blower motor M1 stops, the coil of the 4th contactor KM4 Electric passs steam supply valve V2 while, the second normally opened auxiliary contact KM4-2 closure of the 4th contactor, the of the first relay at this time 6th normally closed interlock KA3-6 of six normally closed interlock KA1-6 and third relay is in closed state, the line of second contactor KM2 Enclose electric, the self-keeping contact of second contactor KM2 is attracted self-insurance, and the main contact of second contactor KM2 is closed, blow valve motor M2 Reversion, blow valve V1 returns to closed state；When blow valve V1 is closed in place, blow valve closes touching for inductive switch SQ2 in place Head is closed, and the coil of the 5th relay KA5 obtains electric, and the normally closed interlock of the 5th relay KA5 disconnects the line for making second contactor KM2 Dead electricity is enclosed, blow valve motor M2 stops；It is thus achieved that when blower motor M1 stops, while steam supply valve V2 is closed, blow valve V1 is also switched off, and the toys such as mouse enter equipment inner cavity from blow-down pipe during preventing from stopping transport, and equipment damage is caused when in order to avoid starting. When the coil of third contactor KM3 obtains electric, the normally closed auxiliary contact of third contactor KM3 disconnects, and makes the 4th contactor KM4's Coil can not obtain it is electric, with realize interlocking.When equipment is in starting state, the coil of the first relay KA1 obtains electric, the first relay The 6th normally closed interlock KA1-6 of device KA1 is disconnected, and the coil of second contactor KM2 is in power failure state at this time, and blow valve V1 will not Generate closing motion.When blower motor M1 Acceleration of starting, the coil of third relay KA3 obtain it is electric, the 6th of third relay the Normally closed interlock KA3-6 is disconnected, and the coil of second contactor KM2 is also at power failure state at this time, accelerates to complete in blower motor M1 Before, blow valve V1 not will produce closing motion.

As a further improvement on the present invention, pond is also equipped with the probe of oxygen concentration instrument DOY to test the dissolving in water The power supply of oxygen concentration, oxygen concentration instrument DOY is connected between the firewire of control loop and zero curve, the signal output of oxygen concentration instrument DOY End AIO+, AIO mono- is connected with the signal input part of PLC controller, and PLC controller is by extending mouth and analog output module phase Connection, signal output end A01+, A01- of analog output module are connected with the signal input part of fan frequency conversion controller VF1 It connects.The pond dissolved oxygen concentration value detected is supplied to PLC controller, PLC controller comparative measurements oxygen dense by oxygen concentration instrument DOY The difference of angle value and setting value, if measured, oxygen concentration value is relatively low, and PLC controller is defeated by the signal of analog output module Outlet A01+, A01- sends a signal to fan frequency conversion controller VF1, improves the rotating speed of roots blower；If measuring oxygen concentration value It is higher, then reduce the rotating speed of roots blower.

It is another object of the present invention to overcome problems of the prior art, provide a kind of aeration side in pond Method can make roots blower zero load start and unload, and avoid by moisture attack, and service life is long.

In order to solve the above technical problems, the present invention carries out pond the aeration method of oxygenation, in turn includes the following steps：⑴ Start button SB1 is pressed, so that the coil of the first relay KA1 and first contactor KM1 is obtained electric, the master of first contactor KM1 touches Head is closed, and blow valve motor M2 is rotated forward, and blow valve V1 is gradually opened；When blow valve V1 is reached, the line of first contactor KM1 Dead electricity is enclosed, blow valve motor M2 stops；(2) after blow valve V1 reaches position, the coil of third relay KA3 obtains electric, third relay The second normally open contact KA3-2 be closed, fan frequency conversion controller VF1 control blower motors M1 starts；(3) blower motor M1 starts When startup, the coil of time relay KT1 obtain it is electric, after blower motor M1 reaches full speed, the timing closing of time relay KT1 Normally open contact KT1-1 is closed, and so that the coil of third contactor KM3 is obtained electric, and the main contact of third contactor KM3 is closed, steam supply valve Motor M3 is rotated forward, and steam supply valve V2 is gradually opened；When steam supply valve V2 is opened in place, the coil losing electricity of third contactor KM3 supplies Air valve motor M3 stops；(4) after steam supply valve V2 is opened in place, the coil of second contactor KM2 obtains electric, the master of second contactor KM2 Contact closure, the reversion of blow valve motor M2, blow valve V1 are progressively closed off；When blow valve V1 is closed in place, second contactor The coil losing electricity of KM2, blow valve motor M2 stop；Compressed air enters air supply header G2 by steam supply valve V2, from air supply header G2 sequentially enters gas supply standpipe G3, gas supply transverse tube G5 and gas manifold G6, is finally discharged from aeration head 3, will be deposited in bottom of pond Activated sludge blows afloat and is uniformly suspended in water body；(5) when needing roots blower 1 out of service, when pressing stop button QB1, or When person's blower motor M1 makes the normally closed interlock of the first electrothermal relay FR1 disconnect because of overcurrent, the deactivation coil of the first relay KA1 4th normally closed interlock KA1-4 of electricity, the first relay KA1 is closed, and the third normally open contact KA1-3 of the first relay is disconnected, the 4th normally closed interlock KA2-4 of two relays is in closed state, make the coil of third relay KA3 still in electricity condition, 4th normally open contact KA3-4 of third relay is closed so that the coil of first contactor KM1 again electric, first contactor When the main contact of KM1 is closed, blow valve motor M2 is rotated forward, and blow valve V1 is gradually opened；Until blow valve V1 reaches position, first connects The coil losing electricity of tentaculum KM1, blow valve motor M2 stop；(6) when blow valve V1 is reached, the 4th of the second relay normally closed touches Head KA2-4 is disconnected, and the coil losing electricity of third relay KA3, blower motor M1 is made to stop；(7) when blow valve V1 reaches position and wind turbine After motor M1 stops, the second normally open contact KA2-2 of the second relay is closed, and so that the coil of the 4th contactor KM4 is obtained electric, and the 4th The main contact of contactor KM4 is closed, and the M3 reversions of steam supply valve motor make steam supply valve V2 return to closed state；Steam supply valve V2 closings are arrived Behind position, the main contact of the coil losing electricity of the 4th contactor KM4, the 4th contactor KM4 disconnects, and steam supply valve motor M3 stops；(8) wind While electromechanical machine M1 stops and closes steam supply valve V2, the second normally opened auxiliary contact KM4-2 of the 4th contactor is closed, and makes second to connect The coil of tentaculum KM2 obtains electric, and the main contact of second contactor KM2 is closed, and the reversion of blow valve motor M2, blow valve V1 returns to pass Closed state；When blow valve V1 is closed in place, the coil losing electricity of second contactor KM2, blow valve motor M2 stops.

Compared with the existing technology, the present invention achieves following advantageous effect：Before the startup of roots blower 1, first automatically open Blow valve V1 ensures that roots blower 1 starts without any load, after roots blower 1 reaches full speed, then opens Steam supply valve V2, closes blow valve V1, and each compressed air pipe is built pressure and is aerated to pond；Since roots blower 1 is under full speed It is aerated to pond, the activated sludge of sedimentation can be blown afloat quickly, ensure that the outlet of each aeration head is uniform.Roots blower 1 Before shutdown, blow valve V1 off-loads are first opened, roots blower 1 is shut down in the state of complete off-load, is conducive to extend roots blower 1 Service life；And the high-temperature gas in compressed air pipe is exhausted when shutting down, preventing siphonage makes wind turbine choke Water avoids damaging roots blower 1 because shutting down；Steam supply valve V2 is closed after shutdown, so that roots blower 1 is isolated with air supply header G2, is kept away Exempt to influence the operation of adjacent roots blower；In the state of stopping transport long, also avoid roots blower 1 by water in supply air line The erosion of vapour.When blower motor M1 makes the normally closed interlock of the first electrothermal relay FR1 disconnect because of overcurrent, the present invention also ensures that Blow valve V1 is first opened, and equally ensure that roots blower 1 is shut down in the state of zero load.When blower motor M1 stoppings, gas supply While valve V2 is closed, blow valve V1 is also switched off, and the toys such as mouse enter equipment inner cavity from blow-down pipe during preventing from stopping transport, with Exempt to cause equipment damage when starting.

Description of the drawings

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, attached drawing only provide with reference to Illustrate to use, it is non-limiting the present invention.

Fig. 1 is the flow chart of the aerating system in pond of the present invention.

Fig. 2 is the major loop schematic diagram of aerating system in Fig. 1.

Fig. 3 is the control loop schematic diagram one of aerating system in Fig. 1.

Fig. 4 is the control loop schematic diagram two of aerating system in Fig. 1.

In figure：1. roots blower；2. silencer；3. aeration head；G1. fan outlet tube；G2. air supply header；G3. gas supply is vertical Pipe；G4. dilatation pipe；G5. transverse tube is supplied；G6. gas manifold；G7. bleeder pipe；V1. blow valve；V2. steam supply valve；V3. check-valves； V4. bleeder valve；M1. blower motor；M2. blow valve motor；M3. steam supply valve motor；QF1. the first breaker；QF2. the second open circuit Device；QF3. third breaker；QF4. the 4th breaker；SB1. start button；QB1. stop button；ES. scram button；SQ1. it puts Empty valve reaches an inductive switch；SQ2. blow valve closes inductive switch in place；SQ3. steam supply valve reaches an inductive switch；SQ4. it supplies Valve closes inductive switch in place；KM1. first contactor；KM2. second contactor；KM3. third contactor；KM4. the 4th contactor； VF1. fan frequency conversion controller；FR1. the first electrothermal relay；KA1. the first relay；KA2. the second relay；KA3. third after Electric appliance；KA4. the 4th relay；KA5. the 5th relay；KA6. the 6th relay；KT1. the time relay；DOY. oxygen concentration Instrument；HL1. fan operation signal lamp.

Specific implementation mode

As shown in Figure 1, the aerating system in pond of the present invention, including roots blower 1 and multiple aerations positioned at basin bottom First 3, the air inlet of each roots blower 1 is separately installed with silencer 2, and the outlet of each roots blower 1, which is separately installed with, to be upwardly extended Fan outlet tube G1, steam supply valve V2, outlet and the air supply header G2 phases of steam supply valve V2 are installed at the top of fan outlet tube G1 Even, air supply header G2 is connected with the gas supply standpipe G3 upwardly extended, supplies the top of standpipe G3 and along sink top horizontal extension Gas supply transverse tube G5 be connected, be connected with the more gas manifold G6 extended to basin bottom, each gas manifold on gas supply transverse tube G5 The lower end of G6 is connected with the air inlet of corresponding aeration head 3 respectively；The stage casing of fan outlet tube G1 is connected with horizontal-extending emptying Pipe, the outlet of the blow-down pipe is equipped with blow valve V1.

Blow valve V1 and steam supply valve V2 may be used manual and electric dual-purpose valve and can first open and put before roots blower 1 start Empty valve V1, then roots blower 1 start without any load, after roots blower 1 reaches full speed, slowly open Steam supply valve V2 after steam supply valve V2 is opened in place, then slowly closes blow valve V1, and compressed air enters gas supply always by steam supply valve V2 Pipe G2 sequentially enters gas supply standpipe G3, gas supply transverse tube G5 and gas manifold G6 from air supply header G2, is finally discharged from aeration head 3, The activated sludge for being deposited in bottom of pond is blown afloat and is uniformly suspended in water body.Before shutdown, blow valve V1 is first slowly opened, by each pressure High-temperature gas in contracting air pipeline exhausts, and waits for that blow valve V1 is opened in place, roots blower 1 is shut down after realizing complete off-load, so Close contacting for steam supply valve V2 partition roots blower 1 and air supply header G2 afterwards, closing blow valve V1 prevent the toys such as mouse from Blow-down pipe enters equipment inner cavity, causes the accident.

The inlet end of gas supply transverse tube G5 is equipped with check-valves V3, and the outlet of check-valves V3 is equipped with and gas supply transverse tube coaxial line Dilatation pipe G4, the diameter of dilatation pipe G4 is more than the diameter of gas supply transverse tube G5, and the bottom of dilatation pipe G4, which is connected with, to be extended downwardly The lower end of bleeder pipe G7, bleeder pipe G7 are equipped with bleeder valve V4.When work, check-valves V3 can ensure the one-way flow of compressed air It is dynamic；The case where check-valves V3 long-time services are possible to be not closed completely, after roots blower 1 shuts down, if a small amount of water flows into Enter to supply when flowing to the directions check-valves V3 in transverse tube G5, dilatation pipe G4 can be arrived first at, since the diameter of dilatation pipe G4 is more than The diameter of transverse tube G5 is supplied, flow can collect in the bottom of dilatation pipe G4, and be downwardly into bleeder pipe G7 and keep in, and periodically open Bleeder valve V4 is discharged, it can be ensured that flow will not enter in roots blower 1, it is ensured that equipment safety.

As shown in Fig. 2, roots blower 1 is driven by blower motor M1, blower motor M1's is controlled by fan frequency conversion controller VF1 and current supply circuit are in series with the first circuit breaker Q F1 and the first electrothermal relay FR1；Blow valve V1 is driven by blow valve motor M2, The current supply circuit of blow valve motor M2 is controlled by the second circuit breaker Q F2, and connects in the rotating forward current supply circuit of blow valve motor M2 There is the main contact of first contactor KM1, the master that second contactor KM2 is in series in the reversion current supply circuit of blow valve motor M2 touches Head；Steam supply valve V2 is driven by steam supply valve motor M3, and the current supply circuit of steam supply valve motor M3 is controlled by third circuit breaker Q F3, and supplies The main contact of third contactor KM3, the reversion power supply of steam supply valve motor M3 are in series in the rotating forward current supply circuit of air valve motor M3 The main contact of the 4th contactor KM4 is in series in circuit.

After first circuit breaker Q F1 closes a floodgate, by the rotating speed of fan frequency conversion controller VF1 control blower motors M1, the first heat after Electric appliance FR1 carries out overcurrent protection to blower motor M1.After second circuit breaker Q F2 closes a floodgate, when the master of first contactor KM1 touches When head is closed, blow valve motor M2 is rotated forward, and blow valve V1 is gradually opened；When the main contact of second contactor KM2 is closed, emptying The reversion of valve motor M2, blow valve V1 are progressively closed off.After third circuit breaker Q F3 closes a floodgate, when the main contact of third contactor KM3 When closure, steam supply valve motor M3 is rotated forward, and steam supply valve V2 is gradually opened, when the main contact of the 4th contactor KM4 is closed, gas supply The M3 reversions of valve motor, steam supply valve V2 are progressively closed off.

As shown in Figure 3, Figure 4, being installed in series on the firewire of control loop has scram button ES and the 4th circuit breaker Q F4, control Stop button QB1, the normally closed interlock of the first electrothermal relay FR1, start button SB1 are in series between the firewire and zero curve in circuit processed With the coil of the first relay KA1, the first normally open contact KA1-1 of the first relay is attempted by the both ends of start button SB1；The Second normally open contact KA1-2 of one relay successively with third normally closed interlock KA2-3, the second contactor KM2 of the second relay Normally closed auxiliary contact and first contactor KM1 coil series connection after be connected between the firewire of control loop and zero curve；Emptying Valve is reached after an inductive switch SQ1 connects with the coil of the second relay KA2 and is connected between the firewire of control loop and zero curve； First normally open contact KA2-1's of the second relay and third normally open contact KA1-3 of the first relay and third relay KA3 It is connected between the firewire of control loop and zero curve after coil series connection, the first normally open contact KA3-1 of third relay is attempted by First both ends normally open contact KA2-1 of the second relay, the second normally open contact KA3-2 of third relay are connected to fan frequency conversion The start end of controller VF1.

After pressing start button SB1, the coil of the first relay KA1 obtains electric, the first normally open contact of the first relay KA1-1 is attracted self-insurance, and it is electric that the second normally open contact KA1-2 closure of the first relay makes the coil of first contactor KM1 obtain, and first When the main contact of contactor KM1 is closed, blow valve motor M2 is rotated forward, and blow valve V1 is gradually opened；Second contactor KM2's is normally closed Auxiliary contact realizes the interlocking of second contactor KM2 and first contactor KM1；When the coil of second contactor KM2 obtains electric, second The normally closed auxiliary contact of contactor KM2 disconnects, and the coil of first contactor KM1 can not obtain electric.

When blow valve V1 is reached, blow valve reaches an inductive switch SQ1 and is closed, and the coil of the second relay KA2 obtains The third normally closed interlock KA2-3 of electricity, the second relay is disconnected, the coil losing electricity of first contactor KM1, first contactor KM1's Main contact disconnects, and blow valve motor M2 stops.

After blow valve V1 reaches position, the first normally open contact KA2-1 of the second relay is closed, at this time the first relay KA1 Coil be in electricity condition, the third normally open contact KA1-3 of the first relay are in closed state, third relay KA3's Coil obtains electric, the first normally open contact KA3-1 actuation self-insurances of third relay, the second normally open contact KA3-2 of third relay It is closed, fan frequency conversion controller VF1 control blower motors M1 starts, and fan operation signal lamp HL1 is lighted.So realize Before blower motor M1 starts, first blow valve V1 is automatically opened in place, makes blower motor M1 in the case of zero load, automatically into Start.

The third normally open contact KA3-3 of third relay is connected to after connecting with the coil of time relay KT1 and controls back Between the firewire and zero curve on road；The timing closing normally open contact of the time relay KT1 normally closed interlock with the 4th relay successively It is connected to control loop after the coil series connection of KA4-2, the normally closed auxiliary contact of the 4th contactor KM4 and third contactor KM3 Between firewire and zero curve, the timing closing that the normally opened self-keeping contact of third contactor KM3 is attempted by time relay KT1 normally opened is touched Head both ends；Steam supply valve reaches the firewire that control loop is attempted by after an inductive switch SQ3 connects with the coil of the 4th relay KA4 Between zero curve.

When blower motor M1 starts to start, the third normally open contact KA3-3 of third relay is closed, time relay KT1 Coil obtain electric, after blower motor M1 reaches full speed, the timing closing normally open contact KT1-1 of time relay KT1 is closed, the The coil of three contactor KM3 obtains electric, the normally opened self-keeping contact actuation self-insurance of third contactor KM3, and the master of third contactor KM3 is tactile When head is closed, steam supply valve motor M3 is rotated forward, and steam supply valve V2 is gradually opened, and prepares to supply to pond.4th contactor KM4's is normal Close the interlocking that auxiliary contact realizes the 4th contactor KM4 and third contactor KM3；When the coil of 4th contactor KM4 obtains electric, the The normally closed auxiliary contact of four contactor KM4 disconnects, and the coil of third contactor KM3 can not obtain electric.

When steam supply valve V2 is opened in place, steam supply valve reaches a contact closure of inductive switch SQ3, the 4th relay KA4 Coil obtain electric, the normally closed interlock KA4-2 of the 4th relay is disconnected, the coil losing electricity of third contactor KM3, third contactor When the main contact of KM3 disconnects, steam supply valve motor M3 stops.

First normally open contact KA4-1 of the 4th relay successively with the normally closed interlock of the 5th relay KA5, first contactor It is connected between the firewire of control loop and zero curve after the coil series connection of the normally closed auxiliary contact and second contactor KM2 of KM1, the The self-keeping contact of two contactor KM2 is attempted by the first both ends normally open contact KA4-1 of the 4th relay, and blow valve pass incudes in place Switch SQ2 is connected to after connecting with the coil of the 5th relay KA5 between the firewire of control loop and zero curve.

After steam supply valve V2 is opened in place, the first normally open contact KA4-1 of the 4th relay is closed, second contactor KM2's Coil obtains electric, self-keeping contact's actuation self-insurance of second contactor KM2, the main contact closure of second contactor KM2, blow valve motor The reversion of M2, blow valve V1 are progressively closed off；When blow valve V1 is closed in place, blow valve closes the contact of inductive switch SQ2 in place It is closed, the coil of the 5th relay KA5 obtains electric, and the normally closed interlock of the 5th relay KA5 disconnects the coil for making second contactor KM2 Dead electricity, blow valve motor M2 stop.When the coil of first contactor KM1 be in electricity condition when, first contactor KM1's is normally closed Auxiliary contact disconnects, and the coil of second contactor KM2 can not obtain electric.So realize 1 full-speed operation of roots blower and steam supply valve After V2 is opened in place, blow valve V1 is progressively closed off, and compressed air enters air supply header G2 by steam supply valve V2, from air supply header G2 Gas supply standpipe G3, gas supply transverse tube G5 and gas manifold G6 are sequentially entered, is finally discharged from aeration head 3, the work of bottom of pond will be deposited in Property sludge blows afloat and is uniformly suspended in water body, into normal operation.

4th normally open contact KA3-4 of third relay connect with the 4th normally closed interlock KA1-4 of the first relay after simultaneously The second both ends normally open contact KA1-2 of the first relay are connected on, the 4th normally closed interlock KA2-4 of the second relay is attempted by first The both ends third normally open contact KA1-3 of relay.

In 1 operational process of roots blower, when pressing stop button QB1, the coil losing electricity of the first relay KA1, first The 4th normally closed interlock KA1-4 of relay KA1 is closed, and the third normally open contact KA1-3 of the first relay is disconnected, the second relay The 4th normally closed interlock KA2-4 be in closed state, make the coil of third relay KA3 still in electricity condition, third relay 4th normally open contact KA3-4 of device is closed；Blow valve V1 is closed, the third normally closed interlock KA2-3 of the second relay Be closed so that the coil of first contactor KM1 again it is electric, when the main contact of first contactor KM1 closure, blow valve motor M2 It rotates forward, blow valve V1 is gradually opened；Until blow valve V1 reaches position, blow valve reaches an inductive switch SQ1 and is closed, the second relay The coil of device KA2 obtains electric, and the third normally closed interlock KA2-3 of the second relay is disconnected, the coil losing electricity of first contactor KM1, the The main contact of one contactor KM1 disconnects, and blow valve motor M2 stops.

After blow valve V1 reaches position, because the 4th normally closed interlock KA2-4 of the second relay is disconnected, the third of the first relay Normally open contact KA1-3 has been disconnected, and the coil losing electricity of third relay KA3, blower motor M1 is made to stop.It is thus achieved that in Roots Before wind turbine 1 shuts down, first opens blow valve V1 and carry out off-load, it is ensured that roots blower 1 is shut down in the state of zero load.When When blower motor M1 makes the normally closed interlock of the first electrothermal relay FR1 disconnect because of overcurrent, control system of the invention also ensures that Blow valve V1 is first opened, and blow valve motor M2 stops after opening in place, equally ensure that roots blower 1 in the state of zero load It shuts down.

Second normally open contact KA2-2 of the second relay successively with the 5th normally closed interlock KA1-5 of the first relay, third 5th normally closed interlock KA3-5 of relay, the normally closed auxiliary contact of the normally closed interlock of the 6th relay KA6, third contactor KM3 And the 4th contactor KM4 coil series connection after be connected between the firewire of control loop and zero curve, the 4th contactor first often Open auxiliary contact KM4-1 be connected on the firewire of control loop and the 5th normally closed interlock KA3-5 of third relay lower pile crown it Between, steam supply valve closes inductive switch SQ4 in place is attempted by control loop firewire and zero after connecting with the coil of the 6th relay KA6 Between line；The 6th normally closed interlock KA1-6 and third of second normally opened auxiliary contact KM4-2 and the first relay of the 4th contactor The self-keeping contact both ends of second contactor KM2 are attempted by after 6th normally closed interlock KA3-6 series connection of relay.

When blow valve V1 reaches position, the coil of the second relay KA2 obtains electric, while the coil losing electricity of third relay KA3 After so that blower motor M1 is stopped, the second normally open contact KA2-2 of the second relay is closed, and the 5th of the first relay is normally closed at this time 5th normally closed interlock KA3-5 of contact KA1-5 and third relay is in closed state, makes the coil of the 4th contactor KM4 Obtain electric, the first normally opened auxiliary contact KM4-1 actuations self-insurance of the 4th contactor, the main contact closure of the 4th contactor KM4, gas supply The M3 reversions of valve motor, make steam supply valve V2 return to closed state, and after steam supply valve V2 is closed in place, steam supply valve closes inductive switch in place The contact closure of SQ4, the coil of the 6th relay KA6 obtain electric, and the normally closed interlock of the 6th relay KA6 disconnects, and makes the 4th contact The main contact of the coil losing electricity of device KM4, the 4th contactor KM4 disconnects, and steam supply valve motor M3 stops；Steam supply valve V2 closings make Roots Wind turbine 1 is isolated with air supply header G2, avoids the operation for influencing adjacent roots blower；In the state of stopping transport long, also avoid Roots blower 1 is corroded by steam in supply air line.

After blower motor M1 stops, while the coil of the 4th contactor KM4 obtains electric pass steam supply valve V2, the 4th contactor Second normally opened auxiliary contact KM4-2 is closed, at this time the 6th of the 6th normally closed interlock KA1-6 of the first relay and third relay Normally closed interlock KA3-6 is in closed state, and the coil of second contactor KM2 obtains electric, self-keeping contact's actuation of second contactor KM2 The main contact of self-insurance, second contactor KM2 is closed, and the reversion of blow valve motor M2, blow valve V1 returns to closed state；Work as emptying When valve V1 is closed in place, blow valve closes the contact closure of inductive switch SQ2 in place, the coil of the 5th relay KA5 obtain it is electric, the 5th The normally closed interlock of relay KA5 disconnects the coil losing electricity for making second contactor KM2, and blow valve motor M2 stops；It is thus achieved that While blower motor M1 stops, and steam supply valve V2 is closed, blow valve V1 is also switched off, during preventing from stopping transport the toys such as mouse from Blow-down pipe enters equipment inner cavity, and equipment damage is caused when in order to avoid starting.

When the coil of third contactor KM3 obtains electric, the normally closed auxiliary contact of third contactor KM3 disconnects, and makes the 4th to connect The coil of tentaculum KM4 can not obtain it is electric, with realize interlocking.When equipment is in starting state, the coil of the first relay KA1 obtains 6th normally closed interlock KA1-6 of electricity, the first relay KA1 is disconnected, and the coil of second contactor KM2 is in power failure state at this time, Blow valve V1 not will produce closing motion.When blower motor M1 Acceleration of starting, the coil of third relay KA3 obtains electric, third 6th normally closed interlock KA3-6 of relay is disconnected, and the coil of second contactor KM2 is also at power failure state at this time, in wind turbine electricity Machine M1 accelerates before completing, and blow valve V1 not will produce closing motion.

Pond is also equipped with the probe of oxygen concentration instrument DOY to test the dissolved oxygen concentration in water, the power supply of oxygen concentration instrument DOY It is connected between the firewire of control loop and zero curve, signal output end AIO+, AIO mono- and the PLC controller of oxygen concentration instrument DOY Signal input part is connected, and PLC controller is connected by extending mouth with analog output module, the signal of analog output module Output terminals A 01+, A01- are connected with the signal input part of fan frequency conversion controller VF1.The water that oxygen concentration instrument DOY will be detected Pond dissolved oxygen concentration value is supplied to PLC controller, the difference of PLC controller comparative measurements oxygen concentration value and setting value, if surveyed Determine that oxygen concentration value is relatively low, then PLC controller sends a signal to wind by signal output end A01+, A01- of analog output module Machine frequency-variable controller VF1, improves the rotating speed of roots blower；If it is higher to measure oxygen concentration value, the rotating speed of roots blower is reduced. PLC controller can select Siemens CPU1200, analog output module that Siemens SM1232 may be used.

The present invention carries out pond the aeration method of oxygenation, in turn includes the following steps：(1) start button SB1 is pressed, is made The coil of first relay KA1 and first contactor KM1 obtains electric, the main contact closure of first contactor KM1, blow valve motor M2 It rotates forward, blow valve V1 is gradually opened；When blow valve V1 is reached, the coil losing electricity of first contactor KM1, blow valve motor M2 Stop；

(2) after blow valve V1 reaches position, the coil of third relay KA3 obtains electric, the second normally open contact KA3-2 of third relay It is closed, fan frequency conversion controller VF1 control blower motors M1 starts；

(3) when blower motor M1 starts to start, the coil of time relay KT1 obtain it is electric, after blower motor M1 reaches full speed, when Between the timing closing normally open contact KT1-1 of relay KT1 be closed, so that the coil of third contactor KM3 is obtained electric, third contactor The main contact of KM3 is closed, and steam supply valve motor M3 is rotated forward, and steam supply valve V2 is gradually opened；When steam supply valve V2 is opened in place, third The coil losing electricity of contactor KM3, steam supply valve motor M3 stop；

(4) after steam supply valve V2 is opened in place, the coil of second contactor KM2 obtains electric, and the main contact of second contactor KM2 is closed, and is put The reversion of empty valve motor M2, blow valve V1 are progressively closed off；When blow valve V1 is closed in place, the deactivation coil of second contactor KM2 Electricity, blow valve motor M2 stop；Compressed air enters air supply header G2 by steam supply valve V2, and confession is sequentially entered from air supply header G2 Gas standpipe G3, gas supply transverse tube G5 and gas manifold G6, are finally discharged from aeration head 3, the activated sludge for being deposited in bottom of pond are blown afloat And it is uniformly suspended in water body；

(5), when needing roots blower 1 out of service, when pressing stop button QB1 or blower motor M1 is because of overcurrent makes first When the normally closed interlock of electrothermal relay FR1 disconnects, the coil losing electricity of the first relay KA1, the 4th of the first relay KA1 normally closed touches Head KA1-4 is closed, and the third normally open contact KA1-3 of the first relay is disconnected, at the 4th normally closed interlock KA2-4 of the second relay In closed state, make the coil of third relay KA3 still in electricity condition, the 4th normally open contact KA3-4 of third relay Be closed so that the coil of first contactor KM1 again it is electric, when the main contact of first contactor KM1 closure, blow valve motor M2 It rotates forward, blow valve V1 is gradually opened；Until blow valve V1 reaches position, the coil losing electricity of first contactor KM1, blow valve motor M2 Stop；

(6) when blow valve V1 is reached, the 4th normally closed interlock KA2-4 of the second relay is disconnected, and makes the line of third relay KA3 Dead electricity is enclosed, blower motor M1 stops；

(7) after blow valve V1 reaches position and blower motor M1 stops, the second normally open contact KA2-2 of the second relay is closed, and is made The coil of 4th contactor KM4 obtains electric, the main contact closure of the 4th contactor KM4, and the M3 reversions of steam supply valve motor make steam supply valve V2 Return to closed state；After steam supply valve V2 is closed in place, the coil losing electricity of the 4th contactor KM4, the main contact of the 4th contactor KM4 It disconnects, steam supply valve motor M3 stops；

(8) while blower motor M1 stops and closes steam supply valve V2, the second normally opened auxiliary contact KM4-2 of the 4th contactor is closed, The coil of second contactor KM2 is set to obtain electric, the main contact of second contactor KM2 is closed, the reversion of blow valve motor M2, blow valve V1 returns to closed state；When blow valve V1 is closed in place, the coil losing electricity of second contactor KM2, blow valve motor M2 stops.

Claims (10)

1. a kind of aerating system in pond, including roots blower (1) and multiple aeration heads (3) positioned at basin bottom, feature It is：The air inlet of each roots blower (1) is separately installed with silencer (2), the outlet of each roots blower (1) be separately installed with to The fan outlet tube (G1) of upper extension is equipped with steam supply valve (V2), the outlet of steam supply valve (V2) at the top of fan outlet tube (G1) It is connected with air supply header (G2), air supply header (G2) is connected with the gas supply standpipe (G3) upwardly extended, the top of gas supply standpipe (G3) Portion is connected with along the horizontal-extending gas supply transverse tube (G5) of sink top, and be connected with more on gas supply transverse tube (G5) prolongs to basin bottom The lower end of the gas manifold (G6) stretched, each gas manifold (G6) is connected with the air inlet of corresponding aeration head (3) respectively；Fan outlet The stage casing of pipe (G1) is connected with horizontal-extending blow-down pipe, and the outlet of the blow-down pipe is equipped with blow valve (V1).

2. the aerating system in pond according to claim 1, it is characterised in that：The inlet end of gas supply transverse tube (G5) is equipped with Check-valves (V3), the outlet of check-valves (V3) are equipped with the dilatation pipe (G4) with gas supply transverse tube coaxial line, dilatation pipe (G4) it is straight Diameter is more than the diameter of gas supply transverse tube (G5), and the bottom of dilatation pipe (G4) is connected with the bleeder pipe (G7) extended downwardly, bleeder pipe (G7) lower end is equipped with bleeder valve (V4).

3. the aerating system in pond according to claim 1, it is characterised in that：Roots blower (1) is by blower motor (M1) Driving, blower motor (M1) be controlled by fan frequency conversion controller (VF1) and current supply circuit be in series with the first breaker (QF1) and First electrothermal relay (FR1)；Blow valve (V1) is driven by blow valve motor (M2), and the current supply circuit of blow valve motor (M2) is controlled The master that first contactor (KM1) is in series in the second breaker (QF2), and in the rotating forward current supply circuit of blow valve motor (M2) touches Head is in series with the main contact of second contactor (KM2) in the reversion current supply circuit of blow valve motor (M2)；Steam supply valve (V2) is by supplying Air valve motor (M3) drives, and the current supply circuit of steam supply valve motor (M3) is controlled by third breaker (QF3), and steam supply valve motor (M3) main contact of third contactor (KM3) is in series in rotating forward current supply circuit, the reversion of steam supply valve motor (M3) is powered back The main contact of the 4th contactor (KM4) is in series in road.

4. the aerating system in pond according to claim 3, it is characterised in that：It is gone here and there between the firewire and zero curve of control loop It is associated with stop button (QB1), the normally closed interlock of the first electrothermal relay (FR1), start button (SB1) and the first relay (KA1) Coil, the first normally open contact (KA1-1) of the first relay is attempted by the both ends of start button (SB1)；First relay Second normally open contact (KA1-2) successively with the third normally closed interlock of the second relay (KA2-3), second contactor (KM2) it is normal It is connected between the firewire of control loop and zero curve after closing the coil series connection of auxiliary contact and first contactor (KM1)；Blow valve Reach be connected to after an inductive switch (SQ1) is connected with the coil of the second relay (KA2) firewire of control loop and zero curve it Between；The first normally open contact (KA2-1) of second relay and the third normally open contact (KA1-3) of the first relay and third relay It is connected between the firewire of control loop and zero curve after the coil series connection of device (KA3), the first normally open contact of third relay (KA3-1) both ends the first normally open contact (KA2-1) of the second relay, the second normally open contact of third relay are attempted by (KA3-2) it is connected to the start end of fan frequency conversion controller (VF1).

5. the aerating system in pond according to claim 4, it is characterised in that：The third normally open contact of third relay (KA3-3) it is connected between the firewire of control loop and zero curve after connecting with the coil of the time relay (KT1)；The time relay (KT1) timing closing normally open contact successively with the normally closed interlock of the 4th relay (KA4-2), the 4th contactor (KM4) it is normal It is connected between the firewire of control loop and zero curve after closing the coil series connection of auxiliary contact and third contactor (KM3), third connects The normally opened self-keeping contact of tentaculum (KM3) is attempted by the timing closing normally open contact both ends of the time relay (KT1)；Steam supply valve reaches Position inductive switch (SQ3) is attempted by after connecting with the coil of the 4th relay (KA4) between the firewire of control loop and zero curve.

6. the aerating system in pond according to claim 5, it is characterised in that：First normally open contact of the 4th relay (KA4-1) it is connect successively with the normally closed interlock of the 5th relay (KA5), the normally closed auxiliary contact of first contactor (KM1) and second It is connected between the firewire of control loop and zero curve after the coil series connection of tentaculum (KM2), the self-keeping contact of second contactor (KM2) Both ends the first normally open contact (KA4-1) of the 4th relay are attempted by, blow valve closes inductive switch (SQ2) in place and the 5th relay It is connected between the firewire of control loop and zero curve after the coil series connection of device (KA5).

7. the aerating system in pond according to claim 6, it is characterised in that：4th normally open contact of third relay (KA3-4) the second normally open contact of the first relay is attempted by after connecting with the 4th normally closed interlock (KA1-4) of the first relay (KA1-2) both ends, the 4th normally closed interlock (KA2-4) of the second relay are attempted by the third normally open contact of the first relay (KA1-3) both ends.

8. the aerating system in pond according to claim 7, it is characterised in that：Second normally open contact of the second relay (KA2-2) successively with the 5th normally closed interlock (KA1-5) of the first relay, third relay the 5th normally closed interlock (KA3-5), The line of the normally closed interlock of 6th relay (KA6), the normally closed auxiliary contact and the 4th contactor (KM4) of third contactor (KM3) It is connected between the firewire of control loop and zero curve after circle series connection, the first normally opened auxiliary contact (KM4-1) string of the 4th contactor It is associated between the firewire of control loop and the lower pile crown of the 5th normally closed interlock (KA3-5) of third relay, steam supply valve closes in place Inductive switch (SQ4) is attempted by after connecting with the coil of the 6th relay (KA6) between the firewire of control loop and zero curve；4th The 6th normally closed interlock (KA1-6) and third relay of the second normally opened auxiliary contact (KM4-2) and the first relay of contactor The series connection of the 6th normally closed interlock (KA3-6) after be attempted by the self-keeping contact both ends of second contactor (KM2).

9. the aerating system in pond according to claim 8, it is characterised in that：Pond is also equipped with oxygen concentration instrument (DOY) Probe to test the dissolved oxygen concentration in water, the power supply of oxygen concentration instrument (DOY) be connected to control loop firewire and zero curve it Between, the signal output end (AIO+, AIO-) of oxygen concentration instrument (DOY) is connected with the signal input part of PLC controller, PLC controller It is connected with analog output module by extending mouth, the signal output end (A01+, A01-) and wind turbine of analog output module The signal input part of frequency-variable controller (VF1) is connected.

10. a kind of aeration method carrying out oxygenation to pond using aerating system described in claim 9, which is characterized in that successively Include the following steps：(1) start button (SB1) is pressed, the first relay (KA1) and the coil of first contactor (KM1) is made to obtain The main contact of electricity, first contactor (KM1) is closed, and blow valve motor (M2) rotates forward, and blow valve (V1) is gradually opened；Work as blow valve (V1) when reaching, the coil losing electricity of first contactor (KM1), blow valve motor (M2) stops；(2) blow valve (V1) reaches position Afterwards, the coil of third relay (KA3) obtains electric, and the second normally open contact (KA3-2) of third relay is closed, fan frequency conversion control Device (VF1) controls blower motor (M1) and starts；(3) when blower motor (M1) starts to start, the coil of the time relay (KT1) obtains Electricity, after blower motor (M1) reaches full speed, the timing closing normally open contact (KT1-1) of the time relay (KT1) is closed, and makes the The coil of three contactors (KM3) obtains electric, the main contact closure of third contactor (KM3), steam supply valve motor (M3) rotating forward, steam supply valve (V2) it is gradually opened；When steam supply valve (V2) is opened in place, the coil losing electricity of third contactor (KM3), steam supply valve motor (M3) Stop；(4) after steam supply valve (V2) is opened in place, the coil of second contactor (KM2) obtains electric, the main contact of second contactor (KM2) It is closed, the reversion of blow valve motor (M2), blow valve (V1) progressively closes off；When blow valve (V1) is closed in place, the second contact The coil losing electricity of device (KM2), blow valve motor (M2) stop；Compressed air enters air supply header (G2) by steam supply valve (V2), Gas supply standpipe (G3), gas supply transverse tube (G5) and gas manifold (G6) are sequentially entered from air supply header (G2), finally from aeration head (3) Discharge, the activated sludge for being deposited in bottom of pond is blown afloat and is uniformly suspended in water body；When need roots blower (1) stop fortune Row, when pressing stop button (QB1) or blower motor (M1) is because of overcurrent makes the normally closed interlock of the first electrothermal relay (FR1) When disconnection, the 4th normally closed interlock (KA1-4) of the coil losing electricity of the first relay (KA1), the first relay (KA1) is closed, the The third normally open contact (KA1-3) of one relay disconnects, and the 4th normally closed interlock (KA2-4) of the second relay is in closed form State makes the coil of third relay (KA3) be closed still in electricity condition, the 4th normally open contact (KA3-4) of third relay is obtained, So that the coil of first contactor (KM1) again it is electric, when the main contact of first contactor (KM1) closure, blow valve motor (M2) it rotates forward, blow valve (V1) is gradually opened；Until blow valve (V1) reaches position, the coil losing electricity of first contactor (KM1) is put Empty valve motor (M2) stops；(6) when blow valve (V1) reaches, the 4th normally closed interlock (KA2-4) of the second relay disconnects, and makes The coil losing electricity of third relay (KA3), blower motor (M1) stop；(7) when blow valve (V1) reaches position and blower motor (M1) After stopping, the second normally open contact (KA2-2) of the second relay is closed, and so that the coil of the 4th contactor (KM4) is obtained electric, the 4th connects The main contact of tentaculum (KM4) is closed, and steam supply valve motor (M3) reversion makes steam supply valve (V2) return to closed state；Steam supply valve (V2) After closing in place, the main contact of the coil losing electricity of the 4th contactor (KM4), the 4th contactor (KM4) disconnects, steam supply valve motor (M3) stop；(8) while blower motor (M1) stops and closes steam supply valve (V2), the second normally opened auxiliary contact of the 4th contactor (KM4-2) it is closed, so that the coil of second contactor (KM2) is obtained electric, the main contact of second contactor (KM2) is closed, blow valve electricity The reversion of machine (M2), blow valve (V1) return to closed state；When blow valve (V1) is closed in place, second contactor (KM2) Coil losing electricity, blow valve motor (M2) stop.