Aerobic device for pollution control system in incineration plant

Abstract

An aerobic device for a pollution control system in an incineration plant is characterized in that the pollution control system is used for treating leachate generated in a garbage storage pit of the incineration plant, the aerobic device comprises an aerobic tank, an aeration device and a submersible fan device arranged underwater, and the aeration device comprises a submersible pump assembly and a flow guide pipe assembly. The submersible fan device supplies air to the submersible pump assembly, on one hand, the submersible fan device and the submersible pump assembly operate below the liquid level of water or the leachate, on the other hand, the submersible fan device and the submersible pump assembly operate below the liquid level of the leachate, and on the other hand, the submersible fan device and the submersible pump assembly operate below the liquid level of the leachate. Sound generated by operation of the air purifier is refracted into water or percolate at the interface of air and water, noise is low, noise reduction facilities do not need to be additionally added, the input cost of other noise reduction equipment is saved, and the noise reduction effect is good. On the other hand, the submersible pump assembly pushes the percolate to be sprayed out in the extending direction of the flow guide pipe assembly to form circulating water flow, so that the submersible pump assembly also has a stirring effect in the process of introducing air for aeration.

Description

Technical Field

[0001] The utility model relates to the field of pollution prevention and control, in particular to an aerobic device used in a pollution prevention and control system in an incineration plant. Background Art

[0002] The leachate pollutants produced by the municipal solid waste incineration plant are complex, with more than 100 kinds of organic substances, most of which are humic high molecular weight compounds and medium molecular weight fusinic acid substances. It contains heterocyclic aromatic hydrocarbons such as benzene, naphthalene, phenanthrene, polycyclic aromatic hydrocarbon compounds, phenols, alcohol compounds, aniline compounds and other difficult-to-degrade organic substances. Therefore, there are many kinds of pollutants and the water quality is quite complex. At the same time, its concentration has the complexity of short-term fluctuations or long-term changes due to the different components of the incoming garbage.

[0003] At present, commonly used pollution prevention and control systems usually need to be equipped with regulating tanks, anti-aerobic tanks and aerobic tanks. In aerobic tanks, blowers and agitators are often required for stirring and aeration respectively. However, it is common to use land-based mechanical agitators to stir the leachate and land-based blowers to provide air to the aeration components. The motors that drive the mechanical agitators and the motors that drive the blowers are both installed on land, which will cause noise pollution if used for a long time. Utility Model Content

[0004] The utility model provides an aerobic device for a pollution prevention and control system in an incineration plant, the main purpose of which is to overcome the defect of using a land blower in an existing aerobic pool to provide air to an aeration component and generate noise pollution in long-term use.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An aerobic device for a pollution control system in an incineration plant, the pollution control system is used to treat leachate generated in a garbage storage pit of the incineration plant, the aerobic device includes at least one aerobic tank for accommodating the leachate, at least one aeration device and at least one submersible fan device arranged underwater, the aeration device includes at least one submersible pump assembly arranged in the aerobic tank and at least one guide pipe assembly arranged on the submersible pump assembly, the liquid outlet of the guide pipe assembly is higher than the liquid level of the leachate, the submersible fan device is used to provide air to the submersible pump assembly, so that after the leachate and the air are mixed in the submersible pump assembly, the submersible pump assembly pushes the leachate to be sprayed out along the extension direction of the guide pipe assembly to form a circulating water flow.

[0007] Furthermore, the submersible pump assembly includes at least one pump body arranged below the liquid surface of the leachate, at least one submersible motor arranged on the pump body, at least one impeller arranged on the output end of the submersible motor, at least one liquid inlet arranged on the lower part of the pump body, at least one air inlet arranged on the lower part of the pump body and connected with the liquid inlet, and at least one liquid outlet arranged in the pump body above the impeller and extending upward, the guide pipe assembly includes a guide sleeve arranged on the liquid outlet and wrapped on the outer side of the submersible motor, and at least one channel arranged between the guide sleeve and the submersible motor, the submersible fan device introduces the air into the air inlet so that the air and the leachate are mixed in the liquid inlet, and the impeller drives the leachate mixed by the air to flow along the extension directions of the liquid outlet and the channel respectively, so that the leachate is sprayed out from the liquid outlet end of the guide sleeve.

[0008] Furthermore, the guide tube assembly also includes at least one hose connector provided on the liquid outlet end of the guide sleeve, and the hose connector is used to change the liquid outlet position of the guide sleeve.

[0009] Furthermore, the submersible motor includes at least one motor body arranged on the pump body, at least one motor casing for mounting the motor body, and at least one motor cover arranged on the motor casing, the liquid outlet is arranged on both sides of the motor casing, and the motor casing and the inner side wall of the guide sleeve are relatively spaced apart to form the channel.

[0010] Furthermore, the submersible fan device includes at least one cooling pool arranged on one side of the aerobic pool, water arranged in the cooling pool, at least one submersible blower arranged in the cooling pool and submerged by the water, at least one outlet pipe arranged on one side of the submersible blower, at least one inlet pipe arranged on the other side of the submersible blower, and at least one control valve arranged on the outlet pipe, and the outlet pipe is connected to the inlet part.

[0011] Furthermore, the submersible blower device also includes a shock-absorbing base arranged in the cooling pool for installing the submersible blower, at least one first silencer arranged on the air inlet pipe, at least one second silencer arranged on the air outlet pipe, and at least one inlet silencer arranged on the air inlet pipe, wherein the first silencer, the second silencer and the inlet silencer are all used to reduce noise.

[0012] Furthermore, the submersible fan device also includes at least one first shockproof joint and at least one second shockproof joint, one side of the first shockproof joint is arranged on the first silencer, and the other side of the first shockproof joint is arranged on the air intake pipe, one side of the second shockproof joint is arranged on the second silencer, and the other side of the second shockproof joint is arranged on the air intake pipe.

[0013] Furthermore, the motor body includes at least one mechanical sealing unit arranged in the pump body, at least one bearing cover arranged on the mechanical sealing unit, at least one first bearing arranged on the bearing cover, at least one main shaft mounted on the first bearing, at least one rotor arranged on the main shaft, at least one stator wrapped on the outside of the rotor and at least one second bearing arranged on the top of the main shaft, and the first bearing and the second bearing are both used to support the rotation of the main shaft.

[0014] Compared with the prior art, the beneficial effects produced by the utility model are:

[0015] The utility model has a simple structure and strong practicality. A submersible fan device is provided to provide air to a submersible pump assembly. On the one hand, the submersible fan device and the submersible pump assembly both operate below the liquid surface of water or leachate. The sound generated by their operation is refracted into the water or leachate at the interface between air and water. The noise is low and no additional noise reduction facility investment is required, thus saving the investment cost of other noise reduction equipment. On the other hand, after the leachate and air are mixed in the submersible pump assembly, the submersible pump assembly pushes the leachate to be ejected along the extension direction of the guide pipe assembly to form a circulating water flow, so that the submersible pump assembly also has a stirring effect during the process of introducing air for aeration, thus saving the user the equipment cost of purchasing a stirrer, achieving the effect of killing two birds with one stone.

[0016] In the utility model, after the leachate and air are mixed in the submersible pump assembly, the submersible pump assembly pushes the leachate to be sprayed out along the extension direction of the guide pipe assembly. When the leachate hits the liquid surface when falling, turbulence and a large number of bubbles are generated on the liquid surface, which has the effect of increasing the oxygen content in the liquid.

[0017] In the utility model, by arranging the submersible motor and the pump body to form an integral body, there is no need to carry out labor-intensive and time-consuming assembly procedures of the motor, the transmission mechanism and the water pump axis alignment at the installation site, and the on-site installation is convenient and fast.

[0018] In the utility model, the submersible motor is arranged to run below the liquid surface of the leachate. The noise generated by the submersible motor can be reduced by arranging the submersible motor below the liquid surface. The sound of the submersible motor running below the liquid surface of the leachate is refracted into the leachate at the interface between the air and the leachate. The noise is low, and there is no need to increase the investment in additional noise reduction facilities, thus saving the investment cost of other noise reduction equipment, having the effect of reducing equipment cost, and achieving the effect of killing two birds with one stone.

[0019] In the utility model, a submersible blower is arranged in a cooling pool. On the one hand, the water in the cooling pool can cool down the submersible blower and extend the service life of the equipment. On the other hand, arranging the submersible blower in water can reduce the noise generated by the submersible blower. The sound of the submersible blower running underwater is refracted into the water at the interface between air and water, so the noise is low and there is no need to increase the investment in additional noise reduction facilities. The investment cost of other noise reduction equipment is saved, which has the effect of reducing equipment cost and achieves the effect of killing two birds with one stone.

[0020] In the utility model, a submersible fan device is arranged in the cooling pool, which occupies a small area and does not require the construction of a fan room compared to the use of land-based fans, thereby achieving the effect of reducing equipment costs.

[0021] In the utility model, by setting the first shockproof joint, the effect of reducing the vibration generated by the submersible blower from being transmitted to the air inlet pipe is achieved, and by setting the second shockproof joint, the effect of reducing the vibration generated by the submersible blower from being transmitted to the air outlet pipe is achieved.

[0022] In the utility model, by setting the first bearing and the second bearing, when the main shaft rotates, the first bearing and the second bearing respectively support and limit the two sides of the main shaft, which greatly improves the stability of the main shaft during high-speed rotation and reduces the jitter of some positions on both sides of the main shaft during the rotation of the main shaft, thereby effectively reducing the wear of the main shaft during use, increasing the service life of the main shaft, and playing a good role in fixing and limiting the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the utility model.

[0024] Figure 2 This is a schematic diagram of the flow direction of the leachate when the aeration device is working, and the arrow indicates the flow direction of the leachate.

[0025] Figure 3 It is a structural schematic diagram of the submersible pump assembly.

[0026] Figure 4 This is a schematic diagram of the structure of a submersible blower.

[0027] Figure 5 It is a structural schematic diagram of the active impeller and the passive impeller.

[0028] Figure 6 It is a structural schematic diagram of this embodiment. DETAILED DESCRIPTION

[0029] The specific implementation of the present utility model is described below with reference to the accompanying drawings.

[0030] Reference Figure 1, an aerobic device for a pollution control system in an incineration plant, the pollution control system is used to treat leachate 20 generated in a garbage storage pit of the incineration plant, the aerobic device 1 includes at least one aerobic tank 21 for accommodating the leachate 20, at least one aeration device 2 and at least one submersible fan device 3 arranged under water 32.

[0031] Reference Figure 1 The aeration device 2 includes at least one submersible pump assembly 5 disposed in the aerobic tank 21 and at least one guide pipe assembly 6 disposed on the submersible pump assembly 5 .

[0032] Reference Figure 1 and Figure 2 The liquid outlet of the guide pipe assembly 6 is higher than the liquid level of the leachate 20, and the submersible fan device 3 is used to provide air to the submersible pump assembly 5, so that the leachate 20 and the air are mixed in the submersible pump assembly 5 and then pushed by the submersible pump assembly 5 to be ejected along the extension direction of the guide pipe assembly 6 to form a circulating water flow.

[0033] Reference Figure 1 and Figure 2 By setting up a submersible fan device 3 to provide air to the submersible pump assembly 5, on the one hand, the submersible fan device 3 and the submersible pump assembly 5 both operate below the liquid surface of the water or leachate 20, and the sound generated by their operation is refracted into the water or leachate 20 at the interface between the air and the water, with low noise, and no additional investment in noise reduction facilities is required, thus saving the investment cost of other noise reduction equipment. On the other hand, after the leachate 20 and the air are mixed in the submersible pump assembly 5, the submersible pump assembly 5 pushes them to be ejected along the extension direction of the guide pipe assembly 6 to form a circulating water flow, so that the submersible pump assembly 5 also has a stirring effect during the process of introducing air for aeration, thus saving the user the equipment cost of purchasing a stirrer, achieving the effect of killing two birds with one stone.

[0034] Reference Figure 1 and Figure 2 The leachate 20 is mixed with air in the submersible pump assembly 5, and then the submersible pump assembly 5 pushes the leachate 20 to be ejected along the extension direction of the guide pipe assembly 6. When the leachate 20 hits the liquid surface when falling, turbulence and a large number of bubbles are generated on the liquid surface, which increases the oxygen content in the liquid.

[0035] Reference Figure 1 and Figure 3 The submersible pump assembly 5 includes at least one pump body 22 arranged below the liquid level of the leachate 20, at least one submersible motor 7 arranged on the pump body 22, at least one impeller 23 arranged on the output end of the submersible motor 7, at least one liquid inlet portion 24 arranged on the lower part of the pump body 22, at least one air inlet portion 25 arranged on the lower part of the pump body 22 and connected to the liquid inlet portion 24, and at least one liquid outlet portion 26 arranged in the pump body 22 above the impeller 23 and extending upward.

[0036] Reference Figure 1 and Figure 3 The guide pipe assembly 6 includes a guide sleeve 27 arranged on the liquid outlet portion 26 and wrapped on the outside of the submersible motor 7, at least one channel 28 arranged between the guide sleeve 27 and the submersible motor 7, and at least one hose connector 29 arranged on the liquid outlet end of the guide sleeve 27, and the hose connector 29 is used to change the liquid outlet position of the guide sleeve 27.

[0037] Reference Figure 1 and Figure 3 The submersible fan device 3 introduces air into the air inlet portion 25, so that the air and the leachate 20 are mixed in the liquid inlet portion 24, and the impeller 23 pushes the leachate 20 mixed with the air to flow along the extension direction of the liquid outlet portion 26 and the channel 28 respectively, so that the leachate 20 is sprayed out from the liquid outlet end of the guide sleeve 27.

[0038] Reference Figure 3 By arranging the submersible motor 7 and the pump body 22 to form an integral whole, there is no need to carry out labor-intensive and time-consuming assembly procedures of the motor, transmission mechanism, and water pump axis alignment at the installation site, and the on-site installation is convenient and fast.

[0039] Reference Figure 1 and Figure 3 By setting the submersible motor 7 to run below the liquid surface of the leachate 20, the noise generated by the submersible motor 7 can be reduced. The sound of the submersible motor 7 running below the liquid surface of the leachate 20 is refracted into the leachate 20 at the interface between the air and the leachate 20, so the noise is low and there is no need to increase the investment in additional noise reduction facilities, thus saving the investment cost of other noise reduction equipment, reducing the equipment cost and achieving the effect of killing two birds with one stone.

[0040] Reference Figure 1 , Figure 4 and Figure 5The submersible fan device 3 includes at least one cooling pool 31 disposed on one side of the aerobic pool 21, water 32 disposed in the cooling pool 31, at least one submersible blower 4 submerged in the cooling pool 31, at least one outlet pipe 33 disposed on one side of the submersible blower, at least one inlet pipe 34 disposed on the other side of the submersible blower 4 and at least one control valve 35 disposed on the outlet pipe 33, a shock-absorbing base 36 disposed in the cooling pool 31 for mounting the submersible blower 4, and at least one inlet pipe 34 disposed on the other side of the submersible blower 4. 4, at least one second muffler 39 provided on the outlet pipe 33, at least one inlet muffler 42 provided on the inlet pipe 34, at least one first shockproof joint 40 and at least one second shockproof joint 42, one side of the first shockproof joint 40 is provided on the first muffler 38, the other side of the first shockproof joint 40 is provided on the inlet pipe 34, one side of the second shockproof joint 42 is provided on the second muffler 39, and the other side of the second shockproof joint 42 is provided on the inlet pipe 34. The outlet pipe 33 is communicated with the inlet portion 25.

[0041] Reference Figure 1 , Figure 4 and Figure 5 The first silencer 38, the second silencer 39 and the inlet silencer 42 are all used to reduce noise. By setting the first shockproof joint 40, the effect of reducing the vibration generated by the submersible blower 4 from being transmitted to the air inlet pipe 34 is achieved. By setting the second shockproof joint 42, the effect of reducing the vibration generated by the submersible blower 4 from being transmitted to the air outlet pipe 33 is achieved.

[0042] Reference Figure 1 , Figure 4 and Figure 5 By setting the submersible blower 4 in the cooling pool 31, on the one hand, the water in the cooling pool 31 can cool the submersible blower 4 and extend the service life of the equipment. On the other hand, setting the submersible blower 4 in water can reduce the noise generated by the submersible blower 4. The sound of the submersible blower 4 running underwater is refracted into the water at the interface between air and water, so the noise is low and there is no need to increase the investment in noise reduction facilities. The investment cost of other noise reduction equipment is saved, which has the effect of reducing equipment cost and achieves the effect of killing two birds with one stone.

[0043] Reference Figure 1 By setting the submersible fan device 3 in the cooling pool 31, a small area is occupied. Compared with the use of land-based fans, no fan room needs to be built, which has the effect of reducing equipment costs.

[0044] Reference Figure 3The submersible motor 7 includes at least one motor body 8 arranged on the pump body 22, at least one motor casing 81 for mounting the motor body 8, and at least one motor cover 82 arranged on the motor casing 81. The liquid outlet 26 is arranged on both sides of the motor casing 81. The motor casing 81 and the inner side wall of the guide sleeve 27 are relatively spaced apart to form a channel 28.

[0045] Reference Figure 3 The motor body 8 includes at least one mechanical seal unit 83 arranged in the pump body 22, at least one bearing cover 84 covered on the mechanical seal unit 83, at least one first bearing 85 arranged on the bearing cover 84, at least one main shaft 86 mounted on the first bearing 85, at least one rotor 88 arranged on the main shaft 86, at least one stator 87 wrapped on the outside of the rotor 88, and at least one second bearing 90 arranged on the top of the main shaft 86. The first bearing 85 and the second bearing 90 are both used to support the rotation of the main shaft 86.

[0046] Reference Figure 3 By setting the first bearing 85 and the second bearing 90, when the main shaft 86 rotates, the first bearing 85 and the second bearing 90 respectively support and limit the two sides of the main shaft 86, which greatly improves the stability of the main shaft 86 during high-speed rotation and reduces the jitter of some positions on both sides of the main shaft 86 during the rotation of the main shaft 86, thereby effectively reducing the wear of the main shaft 86 during use, increasing the service life of the main shaft 86, and playing a good role in fixing and limiting the main shaft 86.

[0047] Features of submersible pump components: 1. The motor adopts a dry structure with built-in motor overload and overheat protection. 2. Two mechanical seals for good waterproofing. 3. The flow-through parts adopt a guide shell design, with low head and large water volume, and high efficiency. 4. The cable adopts a watertight head design with good sealing effect. 5. Low noise during underwater operation, easy installation and maintenance.

[0048] Reference Figure 1 , Figure 4 and Figure 5 The submersible blower 4 includes a first bearing seat unit 91 on a shock-absorbing base 36, at least one active impeller 93 arranged on the first bearing seat unit 91, at least one passive impeller 94 arranged on one side of the active impeller 93, at least one fan housing 92 arranged on the first bearing seat unit 91 for accommodating the active impeller 93 and the passive impeller 94, at least one second bearing seat unit 95 on the top of the active impeller 93, at least one middle support seat 96 arranged on the top of the second bearing seat unit 95, at least one motor unit 97 arranged on the middle support seat 96 and at least one coupling, one side of the coupling is connected to the output end of the motor unit 97, and the other side of the coupling is connected to the input end of the active impeller 93. By setting the coupling, the transmission efficiency is improved, the failure rate of the active impeller 93 during rotation is reduced, and the stability of the fan assembly during use is improved.

[0049] Reference Figure 1 , Figure 4 and Figure 5 The first bearing seat unit 91 includes an upper bearing seat provided on the upper part of a fan housing 92, two first ball bearings provided in the upper bearing seat, and two second ball bearings respectively sleeved on the upper part of the active impeller 93 and the upper part of the passive impeller 94.

[0050] Reference Figure 1 , Figure 4 and Figure 5 The second bearing seat unit 95 includes a lower bearing seat arranged on the upper part of the fan housing 92, and two second ball bearings arranged in the lower bearing seat. The two second ball bearings are respectively mounted on the lower part of the active impeller 93 and the lower part of the passive impeller 94.

[0051] Reference Figure 6 The pollution prevention and control system further comprises at least one pre-filtering device 71 for filtering the leachate 20, at least one anti-aerobic device 76 connected to the pre-filtering device 71, and the anti-aerobic device 76 is connected to the aerobic device 1

[0052] Reference Figure 6 The pollution prevention and control system adopts the treatment process of UASB anaerobic + enhanced MBR (two-stage A / O + UF) + nanofiltration 67 + reverse osmosis 66.

[0053] Reference Figure 6 The pre-filtering device 71 includes a grease trap 72, a fine grid 73, a primary sedimentation tank 74 and a regulating tank 75 which are connected in sequence.

[0054] Reference Figure 6 The anti-aerobic device 76 includes a UASB high-efficiency anaerobic system 77, an intermediate water tank 58, a primary anti-aerobic tank 79, and a secondary anti-aerobic tank 69 which are connected in sequence.

[0055] Reference Figure 6 The aerobic device 1 includes at least one aerobic tank 21 connected to the secondary anti-aerobic tank 69.

[0056] Reference Figure 6 After aerobic treatment in the aerobic device 1 , the leachate 20 is treated through the MBR membrane system 68 , nanofiltration 67 and reverse osmosis 66 .

[0057] Reference Figure 6 The leachate 20 generated in the garbage storage pit of the incineration plant is collected by the leachate 20 drainage system, and then lifted to the grease trap 72 by a pump. After removing some grease, it enters the fine screen slag removal and sedimentation system to further remove some suspended matter.

[0058] Reference Figure 6The effluent from the primary sedimentation tank 74 is pumped into the regulating tank 75. The regulating tank 75 has two functions: one is to regulate the water volume and uniform water quality to reduce the impact load on the treatment system; the other is to have a certain hydrolysis and acidification effect.

[0059] Reference Figure 6 The regulating tank 75 is equipped with a mixer to prevent sludge deposition. The effluent from the regulating tank 75 is pumped and evenly enters the UASB high-efficiency anaerobic system 77 through the water distributor at the lower end of the anaerobic tank.

[0060] Reference Figure 6 The anaerobic system degrades high-concentration organic matter in sewage and removes most of the COD through high-load anaerobic sludge. Organic matter in water is decomposed into CH4, CO2 and a large number of small molecular straight-chain hydrocarbons under the action of acid-producing bacteria, methanogens and other microorganisms, reducing the COD and BOD loads of the subsequent biochemical treatment process.

[0061] Reference Figure 6 The effluent from the UASB high-efficiency anaerobic system 77 flows into the intermediate water tank 58 via gravity flow, which has a degassing effect and can effectively intercept the sludge when the anaerobic tank is not operating well, preventing the anaerobic sludge from entering the primary anti-aerobic tank 79 and increasing the treatment load of the subsequent biochemical system.

[0062] Reference Figure 6 In addition, the alkalinity of the landfill leachate is high, and the inner wall of the process pipeline is prone to scaling. The anaerobic tank circulating effluent is discharged into the intermediate water tank 58, which can reduce the maintenance of the anaerobic system circulating pipeline. If the scaling is serious and the pipeline needs to be replaced, it can also avoid the operation of the anaerobic tank. The anaerobic effluent entering the intermediate water tank 58 is pumped into the MBR membrane biological reaction system unit. In the anoxic tank, the facultative anaerobic bacteria further decompose and degrade some pollutants, remove some COD, and denitrify at the same time, so that nitrates and nitrites are converted into nitrogen gas, thereby achieving the function of biological denitrification.

[0063] Reference Figure 6 The effluent from the anoxic pool flows by gravity to the aerobic pool, where a large number of aerobic bacteria further decompose and degrade most of the pollutants, remove most of the COD and perform nitrification at the same time, laying the foundation for better denitrification. The effluent from the aerobic pool is circulated back through a reflux pump.

[0064] Reference Figure 6In this embodiment, an external ultrafiltration membrane system is used, and the separated sludge is returned to the bioreactor tank through a circulation pump. Due to the use of the membrane system, the sludge concentration in the MBR biochemical system can reach 15-20g / L, the treatment efficiency is greatly improved, and the tank volume is reduced. The main pollutants COD, BOD and ammonia nitrogen are effectively degraded, and the effluent quality is good. In order to further ensure that the effluent meets the standards and appropriately reduce the operating pressure of the pretreatment and biochemical treatment sections, the ultrafiltration membrane effluent needs to be lifted by the nanofiltration 67 water inlet pump and enter the nanofiltration 67 membrane system for further deep treatment. In order to avoid the situation where the effluent still does not meet the standards due to large fluctuations in the influent water quality or excessive total nitrogen load, the reverse osmosis 66 treatment system is used as a guarantee for the effluent to meet the standards. The concentrated liquid produced by the membrane deep treatment system is discharged into the concentrated water tank, lifted by the pump into the softening device in the concentrated liquid treatment system, and then reduced by the DTRO membrane column after softening treatment. The remaining concentrated water is collected and pumped back to the garbage storage pit of the garbage incineration plant and mixed into the furnace for incineration.

[0065] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. An aerobic device for a pollution control system in an incineration plant, the pollution control system is used to treat leachate generated in a garbage storage pit in the incineration plant, characterized in that: The aerobic device comprises at least one aerobic tank for containing the leachate, at least one aeration device and at least one submersible fan device arranged underwater, the aeration device comprises at least one submersible pump assembly arranged in the aerobic tank and at least one guide pipe assembly arranged on the submersible pump assembly, the liquid outlet of the guide pipe assembly is higher than the liquid level of the leachate, and the submersible fan device is used to provide air to the submersible pump assembly, so that after the leachate and the air are mixed in the submersible pump assembly, the submersible pump assembly pushes the leachate to be sprayed out along the extension direction of the guide pipe assembly to form a circulating water flow.

2. An aerobic device for a pollution control system in an incineration plant as claimed in claim 1, characterized in that: The submersible pump assembly includes at least one pump body arranged below the liquid surface of the leachate, at least one submersible motor arranged on the pump body, at least one impeller arranged on the output end of the submersible motor, at least one liquid inlet arranged on the lower part of the pump body, at least one air inlet arranged on the lower part of the pump body and connected with the liquid inlet, and at least one liquid outlet arranged in the pump body above the impeller and extending upward. The guide pipe assembly includes a guide sleeve arranged on the liquid outlet and wrapped on the outer side of the submersible motor, and at least one channel arranged between the guide sleeve and the submersible motor. The submersible fan device introduces the air into the air inlet so that the air and the leachate are mixed in the liquid inlet. The impeller drives the leachate mixed by the air to flow along the extension directions of the liquid outlet and the channel respectively, so that the leachate is sprayed out from the liquid outlet end of the guide sleeve.

3. An aerobic device for a pollution control system in an incineration plant as claimed in claim 2, characterized in that: The guide tube assembly further comprises at least one hose connector provided on the liquid outlet end of the guide sleeve, and the hose connector is used to change the liquid outlet position of the guide sleeve.

4. An aerobic device for a pollution control system in an incineration plant as claimed in claim 2, characterized in that: The submersible motor includes at least one motor body arranged on the pump body, at least one motor casing for mounting the motor body, and at least one motor cover arranged on the motor casing. The liquid outlet is arranged on both sides of the motor casing, and the motor casing and the inner side wall of the guide sleeve are relatively spaced apart to form the channel.

5. An aerobic device for a pollution control system in an incineration plant as claimed in claim 2, characterized in that: The submersible fan device includes at least one cooling pool arranged on one side of the aerobic pool, water arranged in the cooling pool, at least one submersible blower arranged in the cooling pool and submerged by the water, at least one outlet pipe arranged on one side of the submersible blower, at least one inlet pipe arranged on the other side of the submersible blower, and at least one control valve arranged on the outlet pipe, and the outlet pipe is connected to the inlet part.

6. An aerobic device for a pollution control system in an incineration plant as claimed in claim 5, characterized in that: The submersible blower device also includes a shock-absorbing base arranged in the cooling pool for installing the submersible blower, at least one first silencer arranged on the air inlet pipe, at least one second silencer arranged on the air outlet pipe, and at least one inlet silencer arranged on the air inlet pipe. The first silencer, the second silencer, and the inlet silencer are all used to reduce noise.

7. An aerobic device for a pollution control system in an incineration plant as claimed in claim 6, characterized in that: The submersible fan device also includes at least one first shockproof joint and at least one second shockproof joint, one side of the first shockproof joint is arranged on the first silencer, and the other side of the first shockproof joint is arranged on the air intake pipe, one side of the second shockproof joint is arranged on the second silencer, and the other side of the second shockproof joint is arranged on the air intake pipe.

8. An aerobic device for a pollution control system in an incineration plant as claimed in claim 4, characterized in that: The motor body includes at least one mechanical seal unit arranged in the pump body, at least one bearing cover arranged on the mechanical seal unit, at least one first bearing arranged on the bearing cover, at least one main shaft mounted on the first bearing, at least one rotor arranged on the main shaft, at least one stator wrapped on the outside of the rotor and at least one second bearing arranged on the top of the main shaft, and the first bearing and the second bearing are both used to support the rotation of the main shaft.

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