Low-energy-consumption waste gas cooperative treatment sewage system and method

Abstract

The invention belongs to the technical field of water treatment and waste gas treatment, and particularly relates to a low-energy-consumption waste gas cooperative treatment sewage system and method. The device is at least organically composed of a waste gas treatment mechanism, a high-concentration waste gas collection mechanism, a washing tower, a sludge reflux 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 a 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 pool, and the total energy consumption can be greatly reduced through integrated cooperative treatment. After the waste gas is pretreated by the washing tower, the pollutant concentration is greatly reduced, and the follow-up waste gas treatment difficulty and cost can be greatly reduced. Waste gas treatment is realized by adding powdered activated carbon, and triple effects of retarding MBR membrane sewage blockage and improving sewage treatment efficiency are achieved. The method is convenient to operate and implement.

Description

Technical Field

[0001] The present invention belongs to the technical field of water treatment and waste gas treatment, and specifically relates to a low-energy consumption waste gas coordinated sewage treatment system and method. Background Art

[0002] At present, during the operation of sewage treatment equipment, all biochemical and front-end waste gases must be collected and centrally treated to achieve standard emissions. However, in actual operation, on the one hand, there are problems such as gas phase imbalance at each gas phase collection point, difficulty in control, large overall waste gas collection and treatment volume, and poor treatment effect; on the other hand, traditional sewage treatment equipment only focuses on the effect of sewage treatment, and does not take into account the treatment of waste gas generated during the treatment process, resulting in prominent problems such as large investment in the later stage of waste gas treatment and poor treatment effect. Summary of the invention

[0003] The present invention provides a low-energy waste gas coordinated sewage treatment system and method, the purpose of which is to provide a system and method with high treatment efficiency, reducing the total amount of waste gas treatment and the difficulty of treatment, and significantly reducing investment costs and overall energy consumption.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

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

[0006] The high-concentration waste gas collection mechanism includes a lifting tank, a sewage regulating tank, a grease trap, a flotation tank and an anoxic tank; the lifting tank, sewage regulating tank, grease trap, flotation tank and anoxic tank are connected to the upstream sewage outlet in sequence; the lifting tank, sewage regulating tank, grease trap, flotation tank and anoxic tank are connected to the washing tower through the first waste gas recovery line; the waste gas outlet from the washing tower is connected to the anoxic tank; the secondary sedimentation tank is connected to the anoxic tank through the sludge return pump via the MBR; the anoxic tank is also connected to the aerobic tank.

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

[0008] An ozone catalytic chlorination device is arranged between the RO and BAF filter tanks.

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

[0010] An alkali liquid circulation washing tower is connected in parallel to the first waste gas recovery line, and valves are respectively provided at the inlet end of the alkali liquid circulation washing tower and the first waste gas recovery line, so that only one pipeline among the first waste gas recovery line, the pipeline through the alkali liquid circulation washing tower to the washing tower or the first waste gas recovery line to the washing tower is connected.

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

[0012] The blowers are arranged in multiple sets; the multiple blowers are connected in parallel.

[0013] It also includes a blower; the blower is connected to the air outlet of the washing tower, and the washing tower is connected to the aerobic tank, MBR and BAF filter tank respectively through the blower; the high-concentration waste gas collection mechanism includes a lifting tank, a sewage regulating tank, a grease trap, a flotation tank and an anoxic tank; the lifting tank, sewage regulating tank, grease trap, flotation tank and anoxic tank are connected to the upstream sewage outlet in sequence; the lifting tank, sewage regulating tank, grease trap, flotation tank and anoxic tank are connected to the washing tower through the first waste gas recovery line; the waste gas outlet of the washing tower is connected to the anoxic tank; the secondary sedimentation tank and the sludge return line through the MBR The flow pump is connected to the anoxic tank; the anoxic tank is also connected to the aerobic tank; the MBR uses powdered activated carbon for filtration; an ozone catalytic chlorination device is arranged between the RO and BAF filter tanks; the washing tower uses activated sludge + powdered activated carbon for circulation treatment; an alkali liquid circulation washing tower is connected in parallel to the first waste gas recovery line, and valves are respectively arranged at the inlet end of the alkali liquid circulation washing tower and the first waste gas recovery line, so that only one pipeline is connected among the first waste gas recovery line, the pipeline from the alkali liquid circulation washing tower to the washing tower or the first waste gas recovery line to the washing tower.

[0014] A method for low-energy waste gas coordinated sewage treatment, using a low-energy waste gas coordinated sewage treatment system, comprising the following steps:

[0015] Step 1: The upstream wastewater is treated in turn through the lifting tank, sewage regulating tank, grease trap, flotation tank, anoxic tank, and aerobic tank. The waste gas generated during the treatment of the lifting tank, sewage regulating tank, grease trap, flotation tank, and anoxic tank is collected and enters the first waste gas recovery line; if the pollutant concentration in the waste gas is high and there is more acid gas, the waste gas enters step 4 through step 2, otherwise it enters step 4 through step 3;

[0016] Step 2: The waste gas generated by the lifting tank, the sewage regulating tank, the grease trap, the flotation tank and the anoxic tank is recovered into the washing tower through the first waste gas recovery line and the alkali solution circulation washing tower;

[0017] Step 3: The waste gas generated by the lifting tank, sewage regulating tank, grease trap, flotation tank and anoxic tank is recovered into the scrubbing tower through the first waste gas recovery line;

[0018] Step 4: The scrubber treats the incoming exhaust gas, and the exhaust gas generated by the scrubber is sent to the BAF filter and aerobic tank through a blower;

[0019] Step 5: 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; part of the mixed liquid treated in the aerobic tank enters the secondary sedimentation tank, and the other part enters the MBR for treatment; the liquid treated by the MBR enters 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 enters 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; the mixed liquid in the secondary sedimentation tank enters the BAF filter tank;

[0020] Step 6: The qualified water treated by the BAF filter is discharged, and the waste gas generated by the BAF filter is returned to the blower input port through the second waste gas recovery line.

[0021] Beneficial effects:

[0022] (1) While achieving normal aeration of the biochemical system, the present invention utilizes the characteristics of the washing tower and the activated sludge reflux, as well as the adsorption effect of powdered activated carbon, to bring the activated sludge into reverse contact with the hydrocarbon-containing waste gas. Through the absorption and capture effect of the powdered activated carbon and microorganisms, effective pretreatment of the waste gas is ultimately achieved, effectively reducing the difficulty of subsequent waste gas treatment.

[0023] (1) The washing tower in the present invention adopts activated sludge + powdered activated carbon circulation. For waste gas with high pollutant concentration and more acidic gas, an alkali liquid circulation washing tower can be used for pretreatment, which further improves the treatment efficiency. After adding the alkali washing tower at this point, the subsequent waste gas treatment facilities do not need to be equipped with alkali washing facilities, which solves the cost.

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

[0025] (3) The integrated collaborative design method of the present invention can significantly reduce investment costs and overall energy consumption.

[0026] (4) The present invention uses powdered activated carbon to achieve the triple effects of exhaust gas treatment, mitigation of MBR membrane fouling, and improvement of sewage treatment efficiency.

[0027] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a flow chart of the present invention.

[0030] In the figure: 1. lifting tank; 2. sewage regulating tank; 3. grease trap; 4. flotation tank; 5. anoxic tank; 6. aerobic tank; 7. MBR; 8. RO; 9. BAF filter; 10. secondary sedimentation tank; 11. blower; 12. washing tower; 13. first waste gas recovery line; 14. second waste gas recovery line; 15. sludge return pump; 16. waste gas treatment mechanism; 17. third waste gas recovery line; 18. ozone catalytic chlorination device. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1:

[0033] according to Figure 1The low-energy waste gas coordinated sewage treatment system shown in the figure includes at least a waste gas treatment mechanism 16, and also includes a high-concentration waste gas collection mechanism, a washing tower 12, a sludge return 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 connected to the high-concentration waste gas collection mechanism through the first waste gas recovery line 13, and the gas outlet of the washing tower 12 is connected to the aerobic tank 6, the MBR 7 and the BAF filter 9, respectively. The exhaust gas inlet of the filter tank 9 is connected; the exhaust ports of the aerobic tank 6 and the MBR7 are connected to the exhaust gas treatment mechanism 16, and the exhaust gas inlet of the aerobic tank 6 is also connected to the high-concentration exhaust gas collection mechanism; the secondary sedimentation tank 10 and the MBR7 are connected to the high-concentration exhaust gas collection mechanism through the sludge return pump 15; the aerobic tank 6, MBR7 and RO8 are connected in sequence between the high-concentration exhaust gas collection mechanism and the BAF filter tank 9; the exhaust gas outlet of the BAF filter tank 9 is connected to the exhaust gas pipeline of the washing tower 12 through the second exhaust gas recovery line 14.

[0034] In actual use, the upstream wastewater is processed in turn by the high-concentration waste gas collection mechanism and the aerobic pool 6, and the waste gas generated in the high-concentration waste gas collection mechanism is collected and enters the first waste gas recovery line 13; if the waste gas generated by the high-concentration waste gas collection mechanism has a high pollutant concentration and a lot of acid gas, the waste gas generated by the high-concentration waste gas collection mechanism is recovered to the washing tower 12 through the first waste gas recovery line 13 and the alkali solution circulation washing tower, otherwise the waste gas generated by the high-concentration waste gas collection mechanism is recovered to the washing tower 12 through the first waste gas recovery line 13; the washing tower 12 processes the incoming waste gas, and the waste gas generated by the washing tower 12 is sent to the BAF filter 9 and the aerobic pool 6 through the blower 11; the waste gas generated by the aerobic pool 6 and the MBR 7 The gas is collected to the waste gas treatment mechanism 16 through the third waste gas recovery line 17; a part of the mixed liquid treated by the aerobic tank 6 enters the secondary sedimentation tank 10, and the other part enters the MBR7 for treatment; the liquid treated by the MBR7 enters the RO8; the fresh water treated by the RO8 is discharged for use, and the concentrated water treated by the RO8 is treated by the ozone catalytic chlorination device 18 and enters the BAF filter 9; the activated sludge in the secondary sedimentation tank 10 and the MBR7 is pumped into the high-concentration waste gas collection mechanism through the sludge return pump 15; the mixed liquid in the secondary sedimentation tank 10 enters the BAF filter 9; the qualified water treated by the BAF filter 9 is discharged, and the waste gas generated by the BAF filter 9 is returned to the input port of the blower 11 through the second waste gas recovery line 14.

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

[0036] Compared with traditional sewage treatment facilities, the present invention can greatly reduce the amount of waste gas treatment. The actual amount of waste gas treatment is only the amount of aeration in the biochemical pool. The integrated collaborative treatment can greatly reduce the total energy consumption. In the present invention, the pollutant concentration of the waste gas has been greatly reduced after pretreatment in the washing tower, which can greatly reduce the difficulty and cost of subsequent waste gas treatment. The addition of powdered activated carbon achieves the triple effects of waste gas treatment, mitigation of MBR membrane fouling and improvement of sewage treatment efficiency. The present invention is easy to operate and implement.

[0037] The MBR in this embodiment is the abbreviation of membrane bio-reactor; RO is the abbreviation of reverse osmosis. The BAF in the BAF filter is the abbreviation of Biological Aerated Filter, that is, its full name is aerated biological filter.

[0038] Embodiment 2:

[0039] according to Figure 1 The low-energy waste gas collaborative sewage treatment system shown is different from the first embodiment in that: the high-concentration waste gas collection mechanism includes a lifting tank 1, a sewage regulating tank 2, a grease trap 3, a flotation tank 4 and an anoxic tank 5; the lifting tank 1, the sewage regulating tank 2, the grease trap 3, the flotation tank 4 and the anoxic tank 5 are connected to the upstream sewage outlet in sequence; the lifting tank 1, the sewage regulating tank 2, the grease trap 3, the flotation tank 4 and the anoxic tank 5 are connected to the washing tower 12 through the first waste gas recovery line 13; the waste gas outlet of the washing tower 12 is connected to the anoxic tank 5; the secondary sedimentation tank 10 is connected to the anoxic tank 5 through the sludge return pump 15 via the MBR7; the anoxic tank 5 is also connected to the aerobic tank 6.

[0040] In actual use, the upstream wastewater is treated in turn by the lifting tank 1, the sewage regulating tank 2, the grease trap 3, the flotation tank 4, the anoxic tank 5, and the aerobic tank 6. The waste gas generated during the treatment of the lifting tank 1, the sewage regulating tank 2, the grease trap 3, the flotation tank 4 and the anoxic tank 5 is collected and enters the first waste gas recovery line 13; if the pollutant concentration in the waste gas is high and there are more acidic gases, the waste gas generated by the lifting tank 1, the sewage regulating tank 2, the grease trap 3, the flotation tank 4 and the anoxic tank 5 is recovered to the washing tower 12 through the first waste gas recovery line 13 and the alkali solution circulation washing tower; otherwise, the waste gas generated by the lifting tank 1, the sewage regulating tank 2, the grease trap 3, the flotation tank 4 and the anoxic tank 5 is recovered to the washing tower 12 through the first waste gas recovery line 13.

[0041] The technical solution of the present invention collects the high-concentration waste gas generated at the front end, centrally treats it through a washing tower with activated sludge and powdered activated carbon circulation, and then connects it to the sewage biochemical system aeration system through a blower, thereby greatly reducing the gas volume and effectively treating the pollutants in the waste gas. Activated sludge washing can be achieved by using a sludge return system.

[0042] Embodiment three:

[0043] according to Figure 1 The low-energy waste gas collaborative sewage treatment system shown is different from the first embodiment in that powdered activated carbon is added to the MBR 7.

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

[0045] Embodiment 4:

[0046] according to Figure 1 The low-energy waste gas collaborative sewage treatment system shown is different from the first embodiment in that an ozone catalytic chlorination device 18 is provided between the RO8 and BAF filter tanks 9.

[0047] In actual use, the ozone catalytic chlorination device 18 is set to treat the wastewater after biochemical treatment, which can further improve the oxidation efficiency and depth of the wastewater and effectively save energy consumption and costs.

[0048] Embodiment five:

[0049] according to Figure 1 The low-energy waste gas coordinated sewage treatment system shown is different from the first embodiment in that the washing tower 12 uses activated sludge + powdered activated carbon for circulating treatment.

[0050] In actual use, the washing tower 12 adopts the above technical solution, which can effectively treat the pollutants in the exhaust gas while achieving a significant reduction in the gas volume.

[0051] Embodiment six:

[0052] according to Figure 1 The low-energy waste gas collaborative sewage treatment system shown is different from the first embodiment in that: an alkali liquid circulation washing tower is connected in parallel to the first waste gas recovery line 13, and valves are respectively provided at the inlet end of the alkali liquid circulation washing tower and the first waste gas recovery line 13, so that only one pipeline is connected between the first waste gas recovery line 13 and the pipeline from the alkali liquid circulation washing tower to the washing tower 12 or the first waste gas recovery line 13 to the washing tower 12.

[0053] In actual use, waste gas with high pollutant concentration and more acid gas can be pre-treated using an alkaline solution circulating washing tower, further improving the treatment efficiency.

[0054] After adding the alkali washing tower here, the subsequent waste gas treatment facilities do not need to be equipped with alkali washing facilities.

[0055] Embodiment seven:

[0056] according to Figure 1 The low-energy exhaust gas coordinated sewage treatment system shown is different from the first embodiment in that it also includes a blower 11; the blower 11 is connected to the air outlet of the washing tower 12, and the washing tower 12 is connected to the aerobic tank 6, MBR7 and BAF filter tank 9 respectively through the blower 11.

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

[0058] In actual use, the setting of the blower 11 can collect the high-concentration exhaust gas at the front end of the low-energy exhaust gas collaborative treatment sewage system, and then centrally treat it 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 as the aeration system of the sewage biochemical system through the blower 11. While achieving a significant reduction in gas volume, the pollutants in the exhaust gas are effectively treated.

[0059] In specific applications, a strategy of connecting multiple sets of fans 11 in parallel can be adopted, and the specific number of sets is preferably set to reduce the total amount of exhaust gas and improve the exhaust gas treatment effect.

[0060] Embodiment eight:

[0061] according to Figure 1 The low-energy waste gas coordinated sewage treatment system shown in the embodiment is different from the embodiment 1 in that it also includes a blower 11; the blower 11 is connected to the air outlet of the washing tower 12, and the washing tower 12 is connected to the aerobic tank 6, MBR7 and BAF filter tank 9 respectively through the blower 11; the high-concentration waste gas collection mechanism includes a lifting tank 1, a sewage regulating tank 2, a grease trap 3, a flotation tank 4 and an anoxic tank 5; the lifting tank 1, the sewage regulating tank 2, the grease trap 3, the flotation tank 4 and the anoxic tank 5 are connected to the upstream sewage outlet in sequence; the lifting tank 1, the sewage regulating tank 2, the grease trap 3, the flotation tank 4 and the anoxic tank 5 are connected to the washing tower 12 through the first waste gas recovery line 13; the waste gas outlet of the washing tower 12 is connected to the The anoxic tank 5 is connected; the secondary sedimentation tank 10 is connected to the anoxic tank 5 through the MBR7 through the sludge return pump 15; the anoxic tank 5 is also connected to the aerobic tank 6; the MBR7 uses powdered activated carbon for filtration; an ozone catalytic chlorination device 18 is arranged between the RO8 and BAF filter tanks 9; the washing tower 12 uses activated sludge + powdered activated carbon for circulating treatment; the first waste gas recovery line 13 is connected in parallel with an alkali liquid circulation washing tower, and valves are respectively arranged at the inlet end of the alkali liquid circulation washing tower and the first waste gas recovery line 13, so that only one pipeline is connected from the first waste gas recovery line 13 to the washing tower 12 through the alkali liquid circulation washing tower or from the first waste gas recovery line 13 to the washing tower 12.

[0062] In actual use, the wastewater is treated in turn by the lifting tank 1, the sewage regulating tank 2, the grease trap 3, the flotation tank 4, the anoxic tank 5, and the aerobic tank 6. The waste gas generated during the treatment of the lifting tank 1, the sewage regulating tank 2, the grease trap 3, the flotation tank 4, and the anoxic tank 5 is recovered to the washing tower 12 through the first waste gas recovery line 13; if the pollutant concentration in the waste gas is high and there is more acid gas, the waste gas is recovered to the washing tower 12 through the first waste gas recovery line 13 and the alkali solution circulation washing tower; the washing tower 12 treats the incoming waste gas, and the waste gas generated by the washing tower 12 is sent to the BAF filter 9 and the aerobic tank 6 through the blower 11; the waste gas generated by the aerobic tank 6 and the MBR 7 is sent to the BAF filter 9 and the aerobic tank 6 through the third waste gas recovery line 13. The recovery line 17 is collected in the waste gas treatment mechanism 16; a part of the mixed liquid treated in the aerobic tank 6 enters the secondary sedimentation tank 10, and the other part enters the MBR7 for treatment; the liquid treated in the MBR7 enters the RO8; the fresh water treated in the RO8 is discharged for use, and the concentrated water treated in the RO8 is treated by the ozone catalytic chlorination device 18 and enters the BAF filter 9; the activated sludge in the secondary sedimentation tank 10 and the MBR7 is pumped into the anoxic tank 5 through the sludge return pump 15; the mixed liquid in the secondary sedimentation tank 10 enters the BAF filter 9; the qualified water treated in the BAF filter 9 is discharged, and the waste gas generated in the BAF filter 9 is returned to the input port of the blower 11 through the second waste gas recovery line 14.

[0063] While achieving normal aeration of the biochemical system, the present invention utilizes the characteristics of the washing tower and activated sludge reflux, as well as the adsorption effect of powdered activated carbon, to reversely contact the activated sludge with the hydrocarbon-containing waste gas, and finally achieves effective pretreatment of the waste gas through the absorption and capture effect of the powdered activated carbon and microorganisms, thereby reducing the difficulty of subsequent waste gas treatment. For waste gas with high pollutant concentration and more acidic gas, it is recommended to use an alkali liquid circulation washing tower for pretreatment to further improve the treatment efficiency. After adding an alkali washing tower at this point, the subsequent waste gas treatment facilities do not need to be equipped with alkali washing facilities. The present invention can effectively alleviate the problem of unbalanced collection at each gas collection point in traditional waste gas treatment, and greatly reduce the total amount of waste gas treatment and the difficulty of treatment. The present invention can greatly reduce investment costs and overall energy consumption through an integrated collaborative design method. The present invention achieves the triple effects of waste gas treatment, mitigation of MBR membrane fouling and improvement of sewage treatment efficiency through powdered activated carbon.

[0064] In view of the problem of aeration facilities after the biochemical system, such as BAF filter tank, MBR unit, etc., the waste gas aeration cycle recovery mode should be adopted to achieve the purpose of all waste gases finally leaving the biochemical system, so that the overall waste gas volume is significantly reduced.

[0065] The powdered activated carbon in the present invention has a very good effect on alleviating membrane fouling and improving sewage treatment efficiency in the MBR+AO process.

[0066] Embodiment nine:

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

[0068] Step 1: The upstream wastewater is treated in turn by the lifting tank 1, the sewage regulating tank 2, the grease trap 3, the flotation tank 4, the anoxic tank 5, and the aerobic tank 6. The waste gas generated during the treatment of the lifting tank 1, the sewage regulating tank 2, the grease trap 3, the flotation tank 4, and the anoxic tank 5 is collected and enters the first waste gas recovery line 13; if the pollutant concentration in the waste gas is high and there is more acid gas, the waste gas enters step 4 through step 2, otherwise it enters step 4 through step 3;

[0069] Step 2: The waste gas generated by the lifting tank 1, the sewage regulating tank 2, the grease trap 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 solution circulation washing tower;

[0070] Step 3: The waste gas generated by the lifting tank 1, the sewage regulating tank 2, the grease trap 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;

[0071] Step 4: The washing tower 12 processes the incoming exhaust gas, and the exhaust gas generated by the washing tower 12 is sent to the BAF filter 9 and the aerobic tank 6 through the blower 11;

[0072] Step 5: 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; a part of the mixed liquid treated by the aerobic tank 6 enters the secondary sedimentation tank 10, and the other part enters the MBR 7 for treatment; the liquid treated by the MBR 7 enters the RO8; the fresh water treated by the RO8 is discharged for use, and the concentrated water treated by the RO8 is treated by the ozone catalytic chlorination device 18 and enters the BAF filter 9; the activated sludge in the secondary sedimentation tank 10 and the MBR 7 is pumped into the anoxic tank 5 through the sludge return pump 15; the mixed liquid in the secondary sedimentation tank 10 enters the BAF filter 9;

[0073] Step 6: The qualified water treated by the BAF filter 9 is discharged, and the waste gas generated by the BAF filter 9 is returned to the input port of the blower 11 through the second waste gas recovery line 14.

[0074] In the absence of conflicts, technicians in this field can combine the relevant technical features in the above examples according to actual conditions to achieve corresponding technical effects. The specific combinations are not described here one by one.

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

[0076] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0077] The above are only preferred embodiments of the present invention. The present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A low-energy waste gas coordinated sewage treatment system, comprising at least a waste gas treatment mechanism (16), characterized in that: The invention also comprises a high-concentration waste gas collection mechanism, a washing tower (12), a sludge return 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 connected to the high-concentration waste gas collection mechanism through the first waste gas recovery line (13), and the gas outlet of the washing tower (12) is respectively connected to the waste gas inlets of the aerobic tank (6), the MBR (7) and the BAF filter (9); the aerobic tank (6) is connected to the waste gas inlet of the MBR (7) and the BAF filter (9); the waste gas inlet of ... ) and the exhaust ports of the MBR (7) are connected to the waste gas treatment mechanism (16), and the waste gas inlet of the aerobic tank (6) is also connected to the high-concentration waste gas collection mechanism; the secondary sedimentation tank (10) and the MBR (7) are connected to the high-concentration waste gas collection mechanism through a sludge return pump (15); the aerobic tank (6), the MBR (7) and the RO (8) are connected in sequence 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 connected to the waste gas pipeline of the washing tower (12) through a second waste gas recovery line (14).

2. A low-energy waste gas coordinated sewage treatment system as claimed in claim 1, characterized in that: The high-concentration waste gas collection mechanism comprises a lifting tank (1), a sewage regulating tank (2), a grease trap (3), a flotation tank (4) and an anoxic tank (5); the lifting tank (1), the sewage regulating tank (2), the grease trap (3), the flotation tank (4) and the anoxic tank (5) are sequentially connected to the discharge outlet of the upstream sewage; the lifting tank (1), the sewage regulating tank (2), the grease trap (3), the flotation tank (4) and the anoxic tank (5) are connected to the washing tower (12) through a first waste gas recovery line (13); the waste gas discharge outlet of the washing tower (12) is connected to the anoxic tank (5); the secondary sedimentation tank (10) is connected to the anoxic tank (5) through the MBR (7) and the sludge return pump (15); the anoxic tank (5) is also connected to the aerobic tank (6).

3. A low-energy waste gas coordinated sewage treatment system as claimed in claim 1, characterized in that: Powdered activated carbon is added to the MBR (7).

4. A low-energy waste gas collaborative sewage treatment system as claimed in claim 1, characterized in that: An ozone catalytic chlorination device (18) is provided between the RO (8) and the BAF filter (9).

5. A low-energy waste gas coordinated sewage treatment system as claimed in claim 1, characterized in that: The washing tower (12) uses activated sludge + powdered activated carbon for circulation treatment.

6. A low-energy waste gas coordinated sewage treatment system as claimed in claim 1, characterized in that: An alkali liquid circulation washing tower is connected in parallel to the first waste gas recovery line (13), and valves are respectively provided at the inlet end of the alkali liquid circulation washing tower and on the first waste gas recovery line (13), so that only one of the pipelines from the first waste gas recovery line (13) to the washing tower (12) or from the first waste gas recovery line (13) to the washing tower (12) is connected.

7. A low-energy waste gas coordinated sewage treatment system as claimed in claim 1, characterized in that: It also comprises a blower (11); the blower (11) is connected to the air outlet of the washing tower (12); the washing tower (12) is respectively connected to the aerobic tank (6), the MBR (7) and the BAF filter tank (9) through the blower (11).

8. A low-energy waste gas coordinated sewage treatment system as claimed in claim 7, characterized in that: The blowers (11) are provided in multiple sets; the multiple blowers (11) are connected in parallel.

9. A low-energy waste gas coordinated sewage treatment system as claimed in claim 1, characterized in that: The invention also comprises a blower (11); the blower (11) is connected to the gas outlet of the washing tower (12); the washing tower (12) is respectively connected to the aerobic tank (6), the MBR (7) and the BAF filter tank (9) through the blower (11); the high-concentration waste gas collection mechanism comprises a lifting tank (1), a sewage regulating tank (2), a grease trap (3), a flotation tank (4) and an anoxic tank (5); the lifting tank (1), the sewage regulating tank (2), the grease trap (3), the flotation tank (4) and the anoxic tank (5) are connected to the discharge port of the upstream sewage in sequence; the lifting tank (1), the sewage regulating tank (2), the grease trap (3), the flotation tank (4) and the anoxic tank (5) are connected to the washing tower (12) through a first waste gas recovery line (13); the waste gas discharge port of the washing tower (12) is connected to the anoxic tank (5) ; the secondary sedimentation tank (10) is connected to the anoxic tank (5) through the MBR (7) via a sludge return pump (15); the anoxic tank (5) is also connected to the aerobic tank (6); the MBR (7) uses powdered activated carbon for filtration; an ozone catalytic chlorination device (18) is arranged between the RO (8) and BAF filter tanks (9); the washing tower (12) uses activated sludge + powdered activated carbon for circulation treatment; an alkali liquid circulation washing tower is connected in parallel to the first waste gas recovery line (13), and valves are respectively arranged at the inlet end of the alkali liquid circulation washing tower and on the first waste gas recovery line (13), so that only one of the pipelines from the first waste gas recovery line (13) to the washing tower (12) or from the first waste gas recovery line (13) to the washing tower (12) is connected.

10. A method for treating sewage by coordinating waste gas with low energy consumption, characterized in that: The low-energy waste gas collaborative sewage treatment system as claimed in claim 9 comprises the following steps: Step 1: The upstream wastewater is treated in sequence through the lifting tank (1), the sewage regulating tank (2), the grease trap (3), the flotation tank (4), the anoxic tank (5), and the aerobic tank (6). The waste gas generated during the treatment process of the lifting tank (1), the sewage regulating tank (2), the grease trap (3), the flotation tank (4), and the anoxic tank (5) is collected and enters the first waste gas recovery line (13); if the pollutant concentration in the waste gas is high and the acid gas is more, the waste gas enters step 4 through step 2, otherwise it enters step 4 through step 3; Step 2: the waste gas generated by the lifting tank (1), the sewage regulating tank (2), the grease trap (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 solution circulation washing tower; Step 3: the waste gas generated by the lifting tank (1), the sewage regulating tank (2), the grease trap (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); Step 4: The washing tower (12) treats the incoming 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 blower (11); Step 5: The waste gas generated by the aerobic tank (6) and the MBR (7) is collected into the waste gas treatment mechanism (16) via the third waste gas recovery line (17); a part of the mixed liquid treated in the aerobic tank (6) enters the secondary sedimentation tank (10) and the other part enters the MBR (7) for treatment; the liquid treated in the MBR (7) enters the RO (8); Fresh water treated by RO (8) is discharged for use, and concentrated water treated by RO (8) is treated by an ozone catalytic chlorination device (18) and enters a BAF filter (9); the activated sludge in the secondary sedimentation tank (10) and the MBR (7) is pumped into an anoxic tank (5) through a sludge return pump (15); the mixed liquid in the secondary sedimentation tank (10) enters a BAF filter (9); Step 6: The qualified water treated by the BAF filter (9) is discharged, and the waste gas generated by the BAF filter (9) is returned to the input port of the blower (11) through the second waste gas recovery line (14).

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