Low-energy waste gas and sewage system and method

Abstract

The present application belongs to the field of water treatment and waste gas treatment technology, and particularly relates to a low-energy-consumption waste gas and sewage treatment system and method. The present application is composed of a waste gas treatment mechanism, a high-concentration waste gas collecting mechanism, a washing tower, a sludge backflow pump, an aerobic tank, an MBR, an RO, a BAF filter tank, a secondary sedimentation tank, a first waste gas recovery line and a second waste gas recovery line. Compared with the traditional sewage treatment facility, the present application can greatly reduce the amount of waste gas treatment, and the actual amount of waste gas treatment is only the aeration amount of the biochemical tank. The integrated and collaborative treatment can greatly reduce the total energy consumption. In the present application, the pollutant concentration of the waste gas has been greatly reduced after the pretreatment by the washing tower, which can greatly reduce the difficulty and cost of subsequent waste gas treatment. The waste gas treatment is realized by adding powdered activated carbon, which slows down the MBR membrane fouling and improves the sewage treatment efficiency. The present application is easy to operate and implement.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of water treatment and waste gas treatment, and particularly relates to a low-energy-consumption waste gas and sewage treatment system and method. BACKGROUND

[0002] At present, in the operation process of a sewage treatment device, all waste gas in the biochemical and front-end must be collected and treated to achieve standard discharge. However, in the actual operation process, on the one hand, there are problems such as imbalance of gas phase at each gas phase collection point, difficulty in control, large total collection and treatment amount of waste gas, and poor treatment effect; on the other hand, the traditional sewage treatment device only focuses on the effect of sewage treatment, and does not consider the treatment of waste gas generated in the treatment process, resulting in problems such as large investment and poor treatment effect in the later treatment of waste gas. SUMMARY

[0003] The application provides a low-energy-consumption waste gas and sewage treatment system and method, aiming to provide a system and method with high treatment efficiency, reduced total amount and difficulty of waste gas treatment, and greatly reduced investment cost and total energy consumption.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the application is as follows:

[0005] A low-energy-consumption waste gas and sewage treatment system comprises at least a waste gas treatment mechanism, and further comprises a high-concentration waste gas collection mechanism, a washing tower, a sludge backflow pump, an aerobic tank, an MBR, an RO, a BAF filter tank, a secondary sedimentation tank, a first waste gas recovery line and a second waste gas recovery line; a waste gas inlet of the washing tower is communicated with the high-concentration waste gas collection mechanism through the first waste gas recovery line, and gas outlets of the washing tower are communicated with waste gas inlets of the aerobic tank, the MBR and the BAF filter tank; exhaust outlets of the aerobic tank and the MBR are communicated with the waste gas treatment mechanism, and a waste gas inlet of the aerobic tank is further communicated with the high-concentration waste gas collection mechanism; the secondary sedimentation tank and the MBR are connected with the high-concentration waste gas collection mechanism through the sludge backflow pump; the aerobic tank, the MBR and the RO are sequentially connected between the high-concentration waste gas collection mechanism and the BAF filter tank; and a waste gas outlet of the BAF filter tank is communicated with a waste gas pipeline of the washing tower through the second waste gas recovery line.

[0006] The high-concentration waste gas collection mechanism comprises a lifting tank, a sewage adjusting tank, an oil separation tank, a flotation tank and an anoxic tank; the lifting tank, the sewage adjusting tank, the oil separation tank, the flotation tank and the anoxic tank are sequentially connected at an exhaust outlet of upstream sewage; the lifting tank, the sewage adjusting tank, the oil separation tank, the flotation tank and the anoxic tank are connected with the washing tower through the first waste gas recovery line; a waste gas exhaust outlet of the washing tower is connected with the anoxic tank; the secondary sedimentation tank and the MBR are connected with the anoxic tank through the sludge backflow pump; and the anoxic tank is further connected with the aerobic tank.

[0007] Powdered activated carbon is added in the MBR.

[0008] The RO and BAF filter tank are provided with ozone catalytic chlorination device.

[0009] The washing tower adopts active sludge + powdered activated carbon for circulating treatment.

[0010] The first waste gas recovery line is connected in parallel with the lye circulating washing tower, and valves are arranged at the inlet end of the lye circulating washing tower and the first waste gas recovery line, so that only one pipeline is connected in the pipeline from the first waste gas recovery line, through the lye circulating washing tower to the washing tower or the pipeline from the first waste gas recovery line to the washing tower.

[0011] It also includes a blower; the blower is connected to the gas outlet of the washing tower, and the washing tower is connected with the aerobic tank, MBR and BAF filter tank through the blower.

[0012] The blower is provided with multiple sets; multiple sets of blowers are connected in parallel.

[0013] It also includes a blower; the blower is connected to the gas outlet of the washing tower, and the washing tower is connected with the aerobic tank, MBR and BAF filter tank through the blower; the high-concentration waste gas collecting mechanism includes a lifting tank, a sewage adjusting tank, an oil separation tank, a flotation tank and an anoxic tank; the lifting tank, the sewage adjusting tank, the oil separation tank, the flotation tank and the anoxic tank are connected in sequence at the discharge port of the upstream sewage; the lifting tank, the sewage adjusting tank, the oil separation tank, the flotation tank and the anoxic tank are connected with the washing tower through the first waste gas recovery line; the waste gas discharge port of the washing tower is connected with the anoxic tank; the secondary sedimentation tank and the MBR are connected with the anoxic tank through the sludge return pump; the anoxic tank is also connected with the aerobic tank; the MBR adopts powdered activated carbon for filtration; the RO and BAF filter tank are provided with ozone catalytic chlorination device; the washing tower adopts active sludge + powdered activated carbon for circulating treatment; the first waste gas recovery line is connected in parallel with the lye circulating washing tower, and valves are arranged at the inlet end of the lye circulating washing tower and the first waste gas recovery line, so that only one pipeline is connected in the pipeline from the first waste gas recovery line, through the lye circulating washing tower to the washing tower or the pipeline from the first waste gas recovery line to the washing tower.

[0014] A low-energy waste gas collaborative sewage treatment method adopts a low-energy waste gas collaborative sewage treatment system, including the following steps,

[0015] Step one: the upstream wastewater is treated in sequence through the lifting tank, the sewage adjusting tank, the oil separation tank, the flotation tank, the anoxic tank and the aerobic tank; the waste gas generated in the process of the lifting tank, the sewage adjusting tank, the oil separation tank, the flotation tank and the anoxic tank is collected into the first waste gas recovery line; if the concentration of pollutants in the waste gas is high and the acidic gas is more, the waste gas enters step four through step two, otherwise it enters step four through step three;

[0016] Step two: the waste gas generated by the lifting pool, sewage conditioning tank, oil separation tank, air flotation tank and anoxic tank is recovered to the washing tower through the first waste gas recovery line and alkali liquor circulating washing tower;

[0017] Step three: the waste gas generated by the lifting pool, sewage conditioning tank, oil separation tank, air flotation tank and anoxic tank is recovered to the washing tower through the first waste gas recovery line;

[0018] Step four: the washing tower processes the entering waste gas, and the waste gas generated by the washing tower is sent to the BAF filter tank and aerobic tank through the air blower;

[0019] Step five: the waste gas generated by the aerobic tank and MBR is collected to the waste gas treatment mechanism through the third waste gas recovery line; the mixed liquid treated by the aerobic tank is partially introduced into the secondary sedimentation tank and the other part is introduced into the MBR for treatment; the liquid treated by the MBR is introduced into the RO; the fresh water treated by the RO is discharged for use, and the concentrated water treated by the RO is treated by the ozone catalytic chlorination device and then introduced into the BAF filter tank; the activated sludge in the secondary sedimentation tank and MBR is pumped into the anoxic tank through the sludge return pump; and the mixed liquid in the secondary sedimentation tank is introduced into the BAF filter tank;

[0020] Step six: the qualified water treated by the BAF filter tank is discharged, and the waste gas generated by the BAF filter tank is returned to the air blower input port through the second waste gas recovery line.

[0021] Beneficial effects:

[0022] (1) The present application realizes normal aeration of the biochemical system, utilizes the characteristics of the washing tower and activated sludge return, and the adsorption of powdered activated carbon, and realizes reverse contact of activated sludge and hydrocarbon-containing waste gas, so that the waste gas is effectively pretreated through the absorption and capture of powdered activated carbon and microorganisms, and the difficulty of subsequent waste gas treatment is effectively reduced.

[0023] (1) The washing tower in the present application adopts activated sludge + powdered activated carbon circulation, and for waste gas with high pollutant concentration and more acidic gas, alkali liquor circulating washing tower can be used for pretreatment, so that the treatment efficiency is further improved. After the alkali washing tower is added at this point, the subsequent waste gas treatment facilities do not need to be provided with alkali washing facilities, and the cost is solved.

[0024] (2) The present application effectively alleviates the imbalance problem of traditional waste gas treatment of each gas collection point, and greatly reduces the total amount and difficulty of waste gas treatment.

[0025] (3) The integrated and collaborative design method of the present application can greatly reduce the investment cost and total energy consumption.

[0026] (4) The present application realizes waste gas treatment, reduces MBR membrane fouling and improves sewage treatment efficiency through powdered activated carbon.

[0027] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application and can be implemented in accordance with the content of the specification, the following will be described in detail with the preferred embodiments of the present application and with the drawings as follows. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0029] Figure 1 Flowchart of the present application.

[0030] In the figure: 1, lifting pool; 2, sewage conditioning tank; 3, oil separation tank; 4, air floatation tank; 5, anoxic tank; 6, aerobic tank; 7, MBR; 8, RO; 9, BAF filter tank; 10, secondary sedimentation tank; 11, air blower; 12, scrubbing tower; 13, first waste gas recovery line; 14, second waste gas recovery line; 15, sludge backflow pump; 16, waste gas treatment mechanism; 17, third waste gas recovery line; 18, ozone catalytic chlorination device. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] Embodiment one:

[0033] According to Figure 1The low-energy consumption waste gas collaborative sewage treatment system shown at least includes a waste gas treatment mechanism 16, further includes a high-concentration waste gas collecting mechanism, a washing tower 12, a sludge backflow pump 15, an aerobic tank 6, an MBR 7, an RO 8, a BAF filter 9, a secondary sedimentation tank 10, a first waste gas recovery line 13 and a second waste gas recovery line 14; the waste gas inlet of the washing tower 12 is communicated with the high-concentration waste gas collecting mechanism through the first waste gas recovery line 13, the gas outlets of the aerobic tank 6 and the MBR 7 are communicated with the waste gas treatment mechanism 16, the waste gas inlet of the aerobic tank 6 is further communicated with the high-concentration waste gas collecting mechanism; the secondary sedimentation tank 10 and the MBR 7 are connected with the high-concentration waste gas collecting mechanism through the sludge backflow pump 15; the aerobic tank 6, the MBR 7 and the RO 8 are sequentially connected between the high-concentration waste gas collecting mechanism and the BAF filter 9; the waste gas outlet of the BAF filter 9 is communicated with the waste gas pipeline of the washing tower 12 through the second waste gas recovery line 14.

[0034] In actual use, the upstream wastewater is sequentially treated by the high-concentration waste gas collecting mechanism and the aerobic tank 6, and the waste gas generated in the high-concentration waste gas collecting mechanism is collected into the first waste gas recovery line 13; if the waste gas generated in the high-concentration waste gas collecting mechanism has a high concentration of pollutants and more acidic gas, the waste gas generated in the high-concentration waste gas collecting mechanism is recovered into the washing tower 12 through the first waste gas recovery line 13 and the alkali solution circulating washing tower, otherwise the waste gas generated in the high-concentration waste gas collecting mechanism is recovered into the washing tower 12 through the first waste gas recovery line 13; the washing tower 12 treats the entering waste gas, and the waste gas generated in the washing tower 12 is sent to the BAF filter 9 and the aerobic tank 6 through the air blower 11; the waste gas generated in the aerobic tank 6 and the MBR 7 is collected into the waste gas treatment mechanism 16 through the third waste gas recovery line 17; the mixed liquid treated by the aerobic tank 6 is partially introduced into the secondary sedimentation tank 10 and the other part is introduced into the MBR 7 for treatment; the liquid treated by the MBR 7 is introduced into the RO 8; the fresh water treated by the RO 8 is discharged for use, and the concentrated water treated by the RO 8 is treated by the ozone catalytic chlorination device 18 and then introduced into the BAF filter 9; the activated sludge in the secondary sedimentation tank 10 and the MBR 7 is pumped into the high-concentration waste gas collecting mechanism through the sludge backflow pump 15; the mixed liquid in the secondary sedimentation tank 10 is introduced into the BAF filter 9; the qualified water treated by the BAF filter 9 is discharged, and the waste gas generated in the BAF filter 9 is returned to the input port of the air blower 11 through the second waste gas recovery line 14.

[0035] In specific application, other waste gas can also be recovered into the washing tower 12 through the first waste gas recovery line 13 for treatment.

[0036] Compared with the traditional sewage treatment facility, the waste gas treatment amount can be greatly reduced, the actual waste gas treatment amount is only the aeration amount of the biochemical tank, and the integrated and collaborative treatment can greatly reduce the total energy consumption. In the application, the waste gas is pretreated by the washing tower, the pollutant concentration is greatly reduced, and the subsequent waste gas treatment difficulty and cost can be greatly reduced. By adding the powdered activated carbon, the waste gas treatment, the membrane fouling mitigation of the MBR and the sewage treatment efficiency improvement are realized. The application is convenient to operate and implement.

[0037] In the embodiment, the MBR is the abbreviation of membrane bio-reactor, the RO is the abbreviation of reverse osmosis, the BAF in the BAF filter tank is the abbreviation of Biological Aerated Filter, and the full name is an aerated biological filter.

[0038] Embodiment two:

[0039] According to Figure 1 As shown in the low-energy-consumption waste gas collaborative sewage treatment system, different from the embodiment one, the high-concentration waste gas collecting mechanism comprises a lifting tank 1, a sewage adjusting tank 2, an oil separation tank 3, a flotation tank 4 and an anoxic tank 5; the lifting tank 1, the sewage adjusting tank 2, the oil separation tank 3, the flotation tank 4 and the anoxic tank 5 are sequentially connected to the discharge outlet of upstream sewage; the lifting tank 1, the sewage adjusting tank 2, the oil separation tank 3, the flotation tank 4 and the anoxic tank 5 are connected with the washing tower 12 through a first waste gas recovery line 13; the waste gas discharge outlet of the washing tower 12 is connected with the anoxic tank 5; the secondary sedimentation tank 10 and the MBR 7 are connected with the anoxic tank 5 through a sludge return pump 15; and the anoxic tank 5 is also connected with the aerobic tank 6.

[0040] In actual use, the upstream wastewater is sequentially treated by the lifting tank 1, the sewage adjusting tank 2, the oil separation tank 3, the flotation tank 4, the anoxic tank 5 and the aerobic tank 6, and the waste gas generated in the treatment processes of the lifting tank 1, the sewage adjusting tank 2, the oil separation tank 3, the flotation tank 4 and the anoxic tank 5 is collected into the first waste gas recovery line 13; if the pollutant concentration in the waste gas is relatively high and the acidic gas is relatively much, the waste gas generated by the lifting tank 1, the sewage adjusting tank 2, the oil separation tank 3, the flotation tank 4 and the anoxic tank 5 is recovered into the washing tower 12 through the first waste gas recovery line 13 and the alkali liquor circulating washing tower; otherwise, the waste gas generated by the lifting tank 1, the sewage adjusting tank 2, the oil separation tank 3, the flotation tank 4 and the anoxic tank 5 is recovered into the washing tower 12 through the first waste gas recovery line 13.

[0041] The technical scheme of the application collects the high-concentration waste gas generated at the front end, centrally treats the waste gas by the washing tower circulating with the activated sludge and the powdered activated carbon, and then connects the waste gas into the sewage biochemical system aeration system through the air blower, so that the gas amount is greatly reduced and the pollutants in the waste gas are effectively treated. The activated sludge washing can be realized by using the sludge return system.

[0042] Example three:

[0043] According to the low-energy waste gas and sewage treatment system shown in Figure 1 The difference between the embodiment one and the low-energy waste gas and sewage treatment system shown in

[0044] In actual use, the powder activated carbon has a very good effect on slowing down the membrane pollution and improving the sewage treatment efficiency of the MBR+AO process.

[0045] Example four:

[0046] According to the low-energy waste gas and sewage treatment system shown in Figure 1 The difference between the embodiment one and the low-energy waste gas and sewage treatment system shown in

[0047] In actual use, the setting of the ozone catalytic chlorination device 18 can further improve the oxidation efficiency and depth of the treated wastewater, and effectively save energy and cost.

[0048] Example five:

[0049] According to the low-energy waste gas and sewage treatment system shown in Figure 1 The difference between the embodiment one and the low-energy waste gas and sewage treatment system shown in

[0050] In actual use, the above technical solution is adopted in the scrubbing tower 12, which effectively treats the pollutants in the waste gas while greatly reducing the gas volume.

[0051] Example six:

[0052] According to the low-energy waste gas and sewage treatment system shown in Figure 1 The difference between the embodiment one and the low-energy waste gas and sewage treatment system shown in

[0053] In actual use, the alkali circulating scrubbing tower can be used for pretreatment of waste gas with high pollutant concentration and more acidic gas, further improving the treatment efficiency.

[0054] After the alkali washing tower is added here, the subsequent waste gas treatment facilities can no longer be provided with alkali washing facilities.

[0055] Example seven:

[0056] according to Figure 1 The low-energy waste gas co-treatment wastewater system shown differs from Embodiment 1 in that it also includes a blower 11; the blower 11 is connected to the air outlet of the scrubbing tower 12, and the scrubbing tower 12 is connected to the aerobic tank 6, MBR 7 and BAF filter 9 through the blower 11.

[0057] Furthermore, multiple sets of blowers 11 are provided; the multiple sets of blowers 11 are connected in parallel.

[0058] In practical use, the blower 11 can collect high-concentration waste gas at the front end of the wastewater treatment system with low-energy waste gas co-treatment, treat it centrally through a washing tower that circulates activated sludge and powdered activated carbon, and then connect it to the BAF filter 9 and aerobic tank 6, which serve as the aeration system of the wastewater biochemical system, through the blower 11. This achieves a significant reduction in gas volume while effectively treating pollutants in the waste gas.

[0059] In practical applications, a strategy of multiple sets of fans connected in parallel can be adopted. The specific number of sets should be set in order to reduce the total amount of exhaust gas and improve the exhaust gas treatment effect.

[0060] Example 8:

[0061] according to Figure 1 The low-energy waste gas co-treatment wastewater system shown differs from Embodiment 1 in that it further includes a blower 11; the blower 11 is connected to the outlet of the scrubbing tower 12, and the scrubbing tower 12 is connected to the aerobic tank 6, MBR 7, and BAF filter 9 via the blower 11; the high-concentration waste gas collection mechanism includes a lift tank 1, a wastewater equalization tank 2, an oil separator 3, an air flotation tank 4, and an anoxic tank 5; the lift tank 1, wastewater equalization tank 2, oil separator 3, air flotation tank 4, and anoxic tank 5 are sequentially connected to the upstream wastewater discharge outlet; the lift tank 1, wastewater equalization tank 2, oil separator 3, air flotation tank 4, and anoxic tank 5 are connected to the scrubbing tower 12 via a first waste gas recovery line 13; the waste gas from the scrubbing tower 12 is connected to the... Anoxic tank 5 is connected; secondary sedimentation tank 10 and sludge return pump 15 via MBR7 are connected to anoxic tank 5; anoxic tank 5 is also connected to aerobic tank 6; MBR7 uses powdered activated carbon for filtration; ozone catalytic chlorination device 18 is installed between RO8 and BAF filter 9; scrubbing tower 12 uses activated sludge + powdered activated carbon for circulation treatment; an alkaline circulating scrubbing tower is connected in parallel to the first waste gas recovery line 13, and valves are installed at the inlet of the alkaline circulating scrubbing tower and the first waste gas recovery line 13, so that only one pipeline is connected in the pipeline from the first waste gas recovery line 13 to the scrubbing tower 12 via the alkaline circulating scrubbing tower or from the first waste gas recovery line 13 to the scrubbing tower 12.

[0062] In actual use, the wastewater is sequentially treated by the lifting tank 1, the sewage adjusting tank 2, the oil separation tank 3, the air flotation tank 4, the anoxic tank 5 and the aerobic tank 6, the waste gas generated in the treatment processes of the lifting tank 1, the sewage adjusting tank 2, the oil separation tank 3, the air flotation tank 4 and the anoxic tank 5 is recovered into the washing tower 12 through the first waste gas recovery line 13, if the concentration of pollutants in the waste gas is high and the acidic gas is more, the waste gas is recovered into the washing tower 12 through the first waste gas recovery line 13 and the alkali circulating washing tower, the washing tower 12 treats the entering waste gas, the waste gas generated by the washing tower 12 is sent to the BAF filter tank 9 and the aerobic tank 6 through the air blower 11, the waste gas generated by the aerobic tank 6 and the MBR 7 is collected to the waste gas treatment mechanism 16 through the third waste gas recovery line 17, the mixed liquid treated by the aerobic tank 6 enters the secondary sedimentation tank 10 and the MBR 7, the liquid treated by the MBR 7 enters the RO 8, the fresh water treated by the RO 8 is discharged for use, the concentrated water treated by the RO 8 is treated by the ozone catalytic chlorination device 18 and then enters the BAF filter tank 9, the activated sludge in the secondary sedimentation tank 10 and the MBR 7 is pumped into the anoxic tank 5 through the sludge backflow pump 15, the mixed liquid in the secondary sedimentation tank 10 enters the BAF filter tank 9, the qualified water treated by the BAF filter tank 9 is discharged, and the waste gas generated by the BAF filter tank 9 is returned to the input port of the air blower 11 through the second waste gas recovery line 14.

[0063] The present application can effectively alleviate the problem of unbalanced collection of each gas collection point in the traditional waste gas treatment, greatly reduce the total amount of waste gas treatment and the difficulty of treatment. The present application can greatly reduce the investment cost and the overall energy consumption through the integrated collaborative design method. The present application realizes the triple effect of waste gas treatment, mitigation of MBR membrane fouling and improvement of sewage treatment efficiency through the powder activated carbon.

[0064] The present application can effectively alleviate the problem of unbalanced collection of each gas collection point in the traditional waste gas treatment, greatly reduce the total amount of waste gas treatment and the difficulty of treatment. The present application can greatly reduce the investment cost and the overall energy consumption through the integrated collaborative design method. The present application realizes the triple effect of waste gas treatment, mitigation of MBR membrane fouling and improvement of sewage treatment efficiency through the powder activated carbon.

[0065] The powder activated carbon in the present application has a very good effect of mitigating membrane fouling and improving sewage treatment efficiency for the MBR+AO process.

[0066] Example Nine:

[0067] Reference Figure 1 A method for low-energy waste gas and sewage treatment, using a low-energy waste gas and sewage treatment system, comprising the following steps,

[0068] Step one: upstream wastewater is sequentially treated by the lifting pool 1, the sewage adjusting tank 2, the oil separation tank 3, the air flotation tank 4, the anoxic tank 5 and the aerobic tank 6, and the waste gas generated in the treatment processes of the lifting pool 1, the sewage adjusting tank 2, the oil separation tank 3, the air flotation tank 4 and the anoxic tank 5 is collected into the first waste gas recovery line 13; if the pollutant concentration in the waste gas is high and the acidic gas is more, the waste gas enters step four through step two, otherwise, the waste gas enters step four through step three;

[0069] Step two: the waste gas generated by the lifting pool 1, the sewage adjusting tank 2, the oil separation tank 3, the air flotation tank 4 and the anoxic tank 5 is recovered into the washing tower 12 through the first waste gas recovery line 13 and the alkali liquor circulating washing tower;

[0070] Step three: the waste gas generated by the lifting pool 1, the sewage adjusting tank 2, the oil separation tank 3, the air flotation tank 4 and the anoxic tank 5 is recovered into the washing tower 12 through the first waste gas recovery line 13;

[0071] Step four: the washing tower 12 treats the entering waste gas, and the waste gas generated by the washing tower 12 is sent to the BAF filter tank 9 and the aerobic tank 6 through the air blower 11;

[0072] Step five: the waste gas generated by the aerobic tank 6 and the MBR 7 is collected into the waste gas treatment mechanism 16 through the third waste gas recovery line 17; the mixed liquid treated by the aerobic tank 6 enters part of the secondary sedimentation tank 10 and part of the MBR 7 for treatment; the liquid treated by the MBR 7 enters the RO 8; the fresh water treated by the RO 8 is discharged for use, the concentrated water treated by the RO 8 is treated by the ozone catalytic chlorination device 18 and then enters the BAF filter tank 9; the activated sludge in the secondary sedimentation tank 10 and the MBR 7 is pumped into the anoxic tank 5 through the sludge backflow pump 15; the mixed liquid in the secondary sedimentation tank 10 enters the BAF filter tank 9;

[0073] Step six: the qualified water treated by the BAF filter tank 9 is discharged, and the waste gas generated by the BAF filter tank 9 is returned to the input port of the air blower 11 through the second waste gas recovery line 14.

[0074] In the case of no conflict, the skilled in the art can combine the relevant technical features in the above examples according to the actual situation to achieve the corresponding technical effect, and specific for various combination cases will not be described here.

[0075] It should be noted that all the directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0076] In addition, the terms "first", "second", and the like, as used in the description, are used for distinguishing like from like and do not imply or connote any meaning or importance other than the point of distinction. Thus, a "first" feature discussed above could be termed a "second" feature without departing from the teachings of the present application.

[0077] The above description is merely that of preferred embodiments of the application, and is not intended to limit the application to the specific exemplifications. The application is limited only by the language of the claims. Any modifications, equivalent substitutions, and improvements made to the above-described embodiments are intended to be included in the scope of the application.

Claims

1. A low energy consumption exhaust gas collaborative treatment sewage system, at least comprising an exhaust gas treatment mechanism (16), characterized in that: It also includes high concentration waste gas collection mechanism, scrubbing tower (12), sludge backflow pump (15), aerobic tank (6), MBR (7), RO (8), BAF filter tank (9), secondary sedimentation tank (10), first waste gas recovery line (13) and second waste gas recovery line (14); the waste gas inlet of the scrubbing tower (12) is communicated with the high concentration waste gas collection mechanism through the first waste gas recovery line (13), the gas outlet of the scrubbing tower (12) is respectively communicated with the waste gas inlets of the aerobic tank (6), the MBR (7) and the BAF filter tank (9); the exhaust outlets of the aerobic tank (6) and the MBR (7) are communicated with the waste gas treatment mechanism (16), the waste gas inlet of the aerobic tank (6) is also communicated with the high concentration waste gas collection mechanism; the secondary sedimentation tank (10) and the MBR (7) are connected with the high concentration waste gas collection mechanism through the sludge backflow pump (15); the aerobic tank (6), the MBR (7) and the RO (8) are sequentially connected between the high concentration waste gas collection mechanism and the BAF filter tank (9); the waste gas outlet of the BAF filter tank (9) is communicated with the waste gas pipeline of the scrubbing tower (12) through the second waste gas recovery line (14); The high concentration waste gas collection mechanism includes the lifting tank (1), the sewage adjusting tank (2), the oil separation tank (3), the air floatation tank (4) and the anoxic tank (5); the lifting tank (1), the sewage adjusting tank (2), the oil separation tank (3), the air floatation tank (4) and the anoxic tank (5) are sequentially connected at the exhaust outlet of the upstream sewage; the lifting tank (1), the sewage adjusting tank (2), the oil separation tank (3), the air floatation tank (4) and the anoxic tank (5) are connected with the scrubbing tower (12) through the first waste gas recovery line (13); the waste gas exhaust outlet of the scrubbing tower (12) is connected with the anoxic tank (5); the secondary sedimentation tank (10) and the MBR (7) are connected with the anoxic tank (5) through the sludge backflow pump (15); the anoxic tank (5) is also connected with the aerobic tank (6); The MBR (7) is added with powdered activated carbon; The first waste gas recovery line (13) is parallelly connected with the lye circulating scrubbing tower, and valves are respectively arranged at the inlet end of the lye circulating scrubbing tower and the first waste gas recovery line (13), so that only one pipeline is communicated in the pipeline from the first waste gas recovery line (13) to the scrubbing tower (12) or the pipeline from the first waste gas recovery line (13) to the scrubbing tower (12); It also includes a blower (11); the blower (11) is connected at the gas outlet of the scrubbing tower (12), and the scrubbing tower (12) is communicated with the aerobic tank (6), the MBR (7) and the BAF filter tank (9) through the blower (11); the blower (11) is provided in multiple sets; the multiple sets of blowers (11) are connected in parallel; Other waste gas can be recovered to the scrubbing tower (12) through the first waste gas recovery line (13) for treatment.

2. A low energy consumption exhaust gas co-treatment sewage system according to claim 1, characterized in that: The RO (8) and the BAF filter tank (9) are provided with an ozone catalytic chlorination device (18).

3. A low energy consumption exhaust gas co-treatment sewage system according to claim 1, characterized in that: The scrubbing tower (12) adopts active sludge + powdered activated carbon for cyclic treatment.

4. A low energy exhaust gas co-managed wastewater system as claimed in claim 1, wherein: It also includes the air blower (11); the air blower (11) is connected in the gas outlet of washing tower (12), and washing tower (12) is communicated with aerobic tank (6), MBR (7) and BAF filter (9) through air blower (11); the high concentration waste gas collecting mechanism includes lifting tank (1), sewage adjusting tank (2), oil separation tank (3), air flotation tank (4) and anoxic tank (5); the lifting tank (1), sewage adjusting tank (2), oil separation tank (3), air flotation tank (4) and anoxic tank (5) are sequentially connected in the discharge port of upstream sewage; the lifting tank (1), sewage adjusting tank (2), oil separation tank (3), air flotation tank (4) and anoxic tank (5) are connected with washing tower (12) through first waste gas recovery line (13); the waste gas discharge port of washing tower (12) is connected with anoxic tank (5); secondary sedimentation tank (10) and through MBR (7) are connected with anoxic tank (5) through sludge return pump (15); the anoxic tank (5) is also connected with aerobic tank (6); the MBR (7) adopts powder activated carbon for filtration; the RO (8) and BAF filter (9) are provided with ozone catalytic chlorination device (18); the washing tower (12) adopts activated sludge+powder activated carbon for circulating treatment; the first waste gas recovery line (13) is provided with lye circulating washing tower in parallel, and valve doors are respectively arranged at the inlet end of lye circulating washing tower and the first waste gas recovery line (13), so that only one pipeline is communicated in the pipeline from the first waste gas recovery line (13) to washing tower (12) or the pipeline from the first waste gas recovery line (13) to washing tower (12) through lye circulating washing tower.

5. A method for low energy consumption exhaust gas co-treatment of wastewater, characterized by: The low-energy-consumption waste gas coordinated sewage treatment system of claim 4 comprises the following steps, Step one: upstream wastewater is sequentially treated in lifting tank (1), sewage adjusting tank (2), oil separation tank (3), air flotation tank (4), anoxic tank (5) and aerobic tank (6), and the waste gas generated in the treatment process of lifting tank (1), sewage adjusting tank (2), oil separation tank (3), air flotation tank (4) and anoxic tank (5) is collected into first waste gas recovery line (13); if the concentration of pollutants in the waste gas is relatively high, and the acidic gas is relatively more, the waste gas enters step four through step two, otherwise, the waste gas enters step four through step three; Step two: the waste gas generated in lifting tank (1), sewage adjusting tank (2), oil separation tank (3), air flotation tank (4) and anoxic tank (5) is recovered into washing tower (12) through first waste gas recovery line (13) and lye circulating washing tower; Step three: the waste gas generated in lifting tank (1), sewage adjusting tank (2), oil separation tank (3), air flotation tank (4) and anoxic tank (5) is recovered into washing tower (12) through first waste gas recovery line (13); Step four: the waste gas entering washing tower (12) is treated, and the waste gas generated in washing tower (12) is sent to BAF filter (9) and aerobic tank (6) through air blower (11). Step five: the waste gas produced by the aerobic tank (6) and the MBR (7) is collected to the waste gas treatment mechanism (16) through the third waste gas recovery line (17); the mixed liquid treated by the aerobic tank (6) is partially introduced into the secondary sedimentation tank (10) and the other part is introduced into the MBR (7) for treatment; the liquid treated by the MBR (7) is introduced into the RO (8); the fresh water treated by the RO (8) is discharged for use, the concentrated water treated by the RO (8) is treated by the ozone catalytic chlorination device (18) and then introduced into the BAF filter tank (9); the activated sludge in the secondary sedimentation tank (10) and the MBR (7) is pumped into the anoxic tank (5) by the sludge return pump (15); the mixed liquid in the secondary sedimentation tank (10) is introduced into the BAF filter tank (9); Step six: the qualified water treated by the BAF filter tank (9) is discharged, and the waste gas produced by the BAF filter tank (9) is returned to the input port of the air blower (11) through the second waste gas recovery line (14); The activated sludge is reversely contacted with the hydrocarbon-containing waste gas through the adsorption of the powder activated carbon and the microorganism.

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