Waste gas treatment system of sewage treatment station

Abstract

The invention relates to a waste gas treatment system of a sewage treatment station. The waste gas treatment system comprises a washing tower and a biological deodorization device, the washing tower is provided with a gas outlet pipe for outputting odor and a liquid outlet pipe for outputting odorous water; the biological deodorization device comprises a biological filter chamber, a biological membrane frame, an air inlet pipe and a liquid inlet pipe are arranged in the biological filter chamber, the air inlet pipe is communicated with the air outlet pipe, the liquid inlet pipe is communicated with the liquid outlet pipe, the biological membrane frame comprises a main frame body, filler plates, a lower aeration pipe and an upper aeration pipe, and the filler plates are divided into a lower-layer filler plate, a middle-layer filler plate and an upper-layer filler plate; the lower-layer filler plate, the middle-layer filler plates and the upper-layer filler plate are sequentially arranged on the main frame body from bottom to top, the liquid inlet pipe is arranged below the lower-layer filler plate, the air inlet pipe and the lower aeration pipe are respectively arranged at the upper end and the lower end of the lower-layer filler plate, and the upper aeration pipe is arranged between the two middle-layer filler plates. According to the invention, odor and odorous water generated by the washing chamber can be uniformly treated without separate treatment, so that a biological filter is saved, and the waste gas treatment cost is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment equipment, and in particular to a waste gas treatment system for a sewage treatment station. Background Art

[0002] The waste gas generated by the sewage treatment station mainly includes ammonia, hydrogen sulfide, methyl mercaptan, methyl sulfide, dimethyl disulfide, carbon disulfide, trimethylamine, styrene and other malodorous gases, which seriously affect the living environment of the surrounding residents. Therefore, it is necessary to collect and treat the odor from the sewage station to improve the quality of life of nearby residents.

[0003] Ammonia, hydrogen sulfide and trimethylamine in the above waste gas are soluble in water, and ammonia and trimethylamine are alkaline when dissolved in water, while hydrogen sulfide is acidic when dissolved in water, while methyl mercaptan, methyl sulfide, dimethyl disulfide, carbon disulfide and styrene are insoluble in water. The existing odor treatment system generally includes a scrubber and a biofilter. After passing through the scrubber, the above waste gas will form odorous water and odor, and then the odorous water and odor will flow into different biofilters for biological deodorization, which will lead to high cost of the odor treatment system. Summary of the invention

[0004] Based on this, it is necessary to provide a waste gas treatment system for a sewage treatment station to address the problem that the current waste gas will form smelly water and odor after passing through the washing tower. The smelly water and odor need to flow into different biological filters for biological deodorization, which leads to high costs.

[0005] A waste gas treatment system for a sewage treatment station, comprising:

[0006] Waste gas recovery device, used to collect waste gas from sewage treatment plants;

[0007] A washing tower is used to wash the waste gas to obtain odor and odorous water; the washing tower is provided with an outlet pipe for outputting the odor and a liquid outlet pipe for outputting the odorous water; and

[0008] A biological deodorization device is used for biological deodorization of odor and odorous water. The biological deodorization device includes a biological filter chamber, an exhaust chamber and a liquid storage chamber. The exhaust chamber is arranged above the biological filter chamber, and the liquid storage chamber is arranged below the biological filter chamber. A biofilm frame, an air inlet pipe and a liquid inlet pipe are arranged in the biological filter chamber. The air inlet pipe is connected to the air outlet pipe, and the liquid inlet pipe is connected to the liquid outlet pipe. The biofilm frame includes a main frame body, a filling plate, a lower aeration pipe and an upper aeration pipe. The number of the filling plates is multiple, which are divided into a lower filling plate, a middle filling plate and an upper filling plate. The lower filling plate The material plate, the middle-layer filler plate and the upper-layer filler plate are sequentially arranged on the main frame from bottom to top, the liquid inlet pipe is arranged below the lower-layer filler plate, the lower-layer filler plate is hung with a desulfurization bacteria growth biofilm, the air inlet pipe and the lower aeration pipe are respectively arranged at the upper and lower ends of the lower-layer filler plate, the number of the middle-layer filler plates is two, one of the middle-layer filler plates is hung with a nitrite bacteria growth biofilm, and the other middle-layer filler plate is hung with a nitrifying bacteria growth biofilm, the upper aeration pipe is arranged between the two middle-layer filler plates, and the upper-layer filler plate is hung with a heterotrophic bacteria growth biofilm.

[0009] As a preferred embodiment, the washing tower includes a water washing chamber and a chemical washing chamber arranged below the water washing chamber, a spray pipe is arranged in the water washing chamber, the spray pipe includes an outer ring pipe, a transverse arc pipe connected to the outer ring pipe and a longitudinal arc pipe connected to the outer ring pipe, the outer ring pipe is provided with the spray heads at circumferential intervals, the transverse arc pipe and the longitudinal arc pipe are arranged in the outer ring pipe, the transverse arc pipe and the longitudinal arc pipe are arranged crisscross, the transverse arc pipe and the longitudinal arc pipe are both concave downwards, the outer ring pipe, the transverse arc pipe and the longitudinal arc pipe are connected to each other, and the spray head is arranged at the intersection of the transverse arc pipe and the longitudinal arc pipe.

[0010] As a preferred solution, the middle-layer filler plate is divided into a first middle-layer filler plate and a second middle-layer filler plate, the upper aeration pipe is arranged between the first middle-layer filler plate and the second middle-layer filler plate, the second middle-layer filler plate is arranged above the first middle-layer filler plate, the first middle-layer filler plate is hung with a nitrite bacteria growth biofilm, the second middle-layer filler plate is hung with a nitrifying bacteria growth biofilm, the upper aeration pipe is provided with upper aeration holes along its length direction, the upper aeration holes are arranged at the upper and lower sides of the upper aeration pipe, the upper aeration holes located at the lower side are aligned with the upper aeration holes aligned with the nitrifying bacteria growth biofilm, and the upper aeration holes located at the upper side are aligned with the nitrifying bacteria growth biofilm.

[0011] As a preferred solution, the filler plate includes a main board body, a frame and a filler unit. The main board body is provided with placement grooves at intervals along its width direction. The placement grooves penetrate the main board body. The frame is clamped in the placement grooves. The frame array is provided with a plurality of clamping columns. The plurality of clamping columns are divided into two groups. The two groups of clamping columns are respectively arranged at the upper and lower ends of the frame. The filler unit is fixedly arranged on the clamping columns.

[0012] As a preferred embodiment, the main board body is integrally connected with a liquid inlet pipe, a liquid flow channel and a nozzle are arranged in the main board body, the liquid flow channel is connected with the liquid inlet pipe, the liquid flow channel includes a main channel and a branch channel connected to the main channel, the main channel is arranged along the length direction of the main board body, the branch channel is arranged along the width direction of the main board body, the number of the branch channels is multiple, the multiple branch channels are grouped in pairs, and the two branch channels in a group are arranged on both sides of the placement groove.

[0013] As a preferred solution, the packing monomer includes a packing ring and fiber filaments, and the fiber filaments are bound around the packing ring.

[0014] As a preferred embodiment, the waste gas treatment system of the sewage treatment station also includes a liquid inlet device, which includes a flushing liquid storage tank, a culture liquid storage tank, a liquid switching valve and a liquid inlet pump. The flushing liquid storage tank and the culture liquid storage tank are connected to the liquid inlet pump through the liquid switching valve, and the liquid inlet pump is connected to the liquid inlet pipe.

[0015] As a preferred solution, the waste gas treatment system of the sewage treatment station also includes a circulation pump, a recovery air pump and a gas switching valve. The circulating liquid pipe is connected to the spray pipe through the circulation pump; the exhaust chamber is provided with a recovery pipe, and the recovery pipe is connected to the gas switching valve through the recovery air pump. The gas switching valve is arranged between the outlet pipe and the inlet pipe.

[0016] As a preferred embodiment, the waste gas treatment system of the sewage treatment station also includes a dosing device, which includes a drug storage tank, a dosing pump, a dosing valve and a dosing flow meter. The drug storage tank is connected to the dosing pipe through the dosing pump, and the dosing valve and the dosing flow meter are arranged between the dosing pump and the dosing pipe.

[0017] As a preferred solution, the waste gas treatment system of the sewage treatment station also includes a pH sensor, an odor detector, a water quality detector and a controller, the pH sensor is connected to the chemical washing chamber, the odor detector is connected to the exhaust chamber, the water quality detector is connected to the biological filter chamber, the pH sensor, the odor detector and the water quality detector are communicatively connected to the controller, and the dosing pump, the circulation pump, the exhaust valve, the recovery air pump and the gas switching valve are all electrically connected to the controller.

[0018] The beneficial effects of the present invention are as follows: when the stinky water covers the biofilm frame, the malodorous components corresponding to the stinky water can be decomposed by the corresponding biofilm, thereby realizing biological deodorization of the stinky water; and when the stinky water covers the biofilm frame, the odor enters from the air inlet pipe, and under the pressure of the stinky water, the odor can gradually move upward in the vertical direction, so that the odor can be accurately delivered, increasing the contact area between the odor and the biofilm to realize biological deodorization of the odor, so that the odor and the stinky water do not need to be treated separately, saving a biological filter tank and effectively reducing the cost of waste gas treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a waste gas treatment system of a sewage treatment station in one embodiment of the present invention;

[0020] Figure 2 for Figure 1 The schematic diagram of the structure of the washing tower in the waste gas treatment system of the sewage treatment station shown;

[0021] Figure 3 for Figure 1 The schematic diagram of the structure of the biological deodorization device in the waste gas treatment system of the sewage treatment station shown;

[0022] Figure 4 for Figure 1 The internal structure diagram of the biofilm frame in the waste gas treatment system of the sewage treatment station in the width direction is shown;

[0023] Figure 5 for Figure 1 The internal structure diagram of the biofilm frame in the waste gas treatment system of the sewage treatment station shown in the longitudinal direction;

[0024] Figure 6 for Figure 1 The internal structure diagram of the filler plate in the waste gas treatment system of the sewage treatment station along the up and down directions;

[0025] Figure 7 for Figure 1 The schematic diagram of the structure of the filler plate and the liquid inlet device in the waste gas treatment system of the sewage treatment station shown;

[0026] Figure 8 for Figure 1The diagram shows the structure of the dosing device in the waste gas treatment system of a sewage treatment plant.

[0027] The meanings of the numbers in the accompanying drawings are:

[0028] 100- Waste gas treatment system of sewage treatment station;

[0029] 10-waste gas recovery device, 11-waste gas storage tank, 12-transfer pump;

[0030] 20-washing tower, 21-water washing chamber, 211-air inlet pipe, 212-outlet, 22-chemical washing chamber, 221-dosing pipe, 222-air outlet pipe, 223-liquid outlet pipe, 224-detection pipe, 225-detection valve, 23-spraying pipe, 231-outer ring pipe, 232-horizontal arc pipe, 233-vertical arc pipe, 24-spraying head;

[0031] 30-transport device, 31-liquid delivery pump, 32-air delivery pump;

[0032] 40-biological deodorization device, 41-biological filter chamber, 411-gas outlet, 412-liquid outlet, 413-water detection pipe, 414-water detection valve, 42-exhaust chamber, 421-exhaust pipe, 422-exhaust valve, 423-gas detection pipe, 424-gas detection valve, 425-recovery gas pipe, 43-liquid storage chamber, 431-liquid outlet valve, 432-circulating liquid pipe, 44-liquid inlet pipe, 441-liquid inlet hole, 45-inlet pipe, 451-gas outlet hole;

[0033] 50-biofilm frame, 51-main frame, 52-filling plate, 521-main body, 5211-sub-channel, 5212-nozzle, 5213-placing slot, 522-frame, 5221-clamping column 5221, 523-filling monomer, 524-fixing cover, 525-liquid inlet pipe, 53-lower filling plate, 54-first middle filling plate, 55-second middle filling plate, 56-lower aeration pipe, 57-upper aeration pipe, 58-upper filling plate;

[0034] 50-dosing device, 61-drug storage tank, 62-dosing pump, 63-dosing valve, 54-dosing flow meter;

[0035] 70-pH sensor;

[0036] 80- Odor detector;

[0037] 90-Water quality detector;

[0038] 110-recovery gas pump;

[0039] 120-gas switching valve;

[0040] 130-circulation pump;

[0041] 140 - liquid inlet device, 141 - flushing liquid storage tank, 142 - culture liquid storage tank, 143 - liquid switching valve, 144 - liquid inlet pump.

[0042] Specific implementation party

[0043] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0044] The specific embodiments of the present invention are described in detail below. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0045] See also Figure 1 A waste gas treatment system 100 for a sewage treatment station according to an embodiment of the present invention comprises a waste gas recovery device 10, a washing tower 20, a conveying device 30 and a biological deodorization device 40. The waste gas recovery device 10 is used to collect waste gas in the sewage treatment station. The washing tower 20 is used to wash the waste gas to obtain odor and odorous water. The conveying device 30 is used to transport the odor and odorous water to the biological deodorization device 40. The biological deodorization device 40 is used to perform biological deodorization on the odor and odorous water.

[0046] See also Figure 1 The waste gas recovery device 10 includes a waste gas storage tank 11 and a delivery pump 12. The waste gas storage tank 11 is used to store the waste gas collected in the sewage treatment station. The delivery pump 12 is connected to the waste gas storage tank 11. Under the delivery of the delivery pump 12, the waste gas in the waste gas storage tank 11 is transported to the washing tower 20.

[0047] See also Figure 2The washing tower 20 includes a water washing chamber 21 and a chemical washing chamber 22. The water washing chamber 21 is provided with an air inlet pipe 211, and the air inlet pipe 211 is communicated with the delivery pump 12. A spray pipe 23 and a spray head 24 are provided in the water washing chamber 21. The spray pipe 23 includes an outer ring pipe 231, a transverse arc pipe 232 connected to the outer ring pipe 231, and a longitudinal arc pipe 233 connected to the outer ring pipe 231. The outer ring pipe 231 is provided with spray heads 24 at intervals in the circumferential direction. The transverse arc pipe 232 and the longitudinal arc pipe 233 are arranged in the outer ring pipe 231. The transverse arc pipe 232 and the longitudinal arc pipe 233 are arranged crisscrossly, and the transverse arc pipe 232 and the longitudinal arc pipe 233 are both concave downwards. The outer ring pipe 231, the transverse arc pipe 232 and the longitudinal arc pipe 233 are arranged in the outer ring pipe 231. The longitudinal arc tubes 233 are interconnected, and a spray head 24 is provided at the intersection of the transverse arc tube 232 and the longitudinal arc tube 233, so that the spray liquid can spread throughout the entire water washing chamber 21, thereby increasing the contact area between the exhaust gas and the spray liquid, making the ammonia, hydrogen sulfide and trimethylamine in the exhaust gas more easily dissolved in the spray liquid; at the same time, since the transverse arc tube 232 and the longitudinal arc tube 233 are both concave downward, even if the water pressure in the spray pipe 23 is low, the liquid in the outer ring tube 231 enters the transverse arc tube 232 and the longitudinal arc tube 233 under the action of gravity, and is sprayed out through the spray head 24 provided at the intersection of the transverse arc tube 232 and the longitudinal arc tube 233, thereby effectively reducing the residual amount of spray liquid in the spray pipe 23, effectively reducing the loss of spray liquid, and effectively saving water resources.

[0048] See also Figure 2 The end of the water washing chamber 21 away from the spray pipe 23 is funnel-shaped, and the water washing chamber 21 is provided with an outlet 212, and the outlet 212 is communicated with the chemical washing chamber 22. The chemical washing chamber 22 is provided with a dosing pipe 221, an air outlet pipe 222 and a liquid outlet pipe 223, and the air outlet pipe 222 is connected to the biological deodorization device 40, and the liquid outlet pipe 223 is connected to the biological deodorization device 40.

[0049] See also Figure 1 The conveying device 30 includes a liquid delivery pump 31 and an air delivery pump 32. The liquid delivery pump 31 is arranged between the liquid outlet pipe 223 and the biological deodorization device, and the air delivery pump 32 is arranged between the air outlet pipe 222 and the biological deodorization device 40.

[0050] See also Figure 3The biological deodorization device 40 includes a biological filter chamber 41, an exhaust chamber 42 and a liquid storage chamber 43. The biological filter chamber 41 is provided with a biofilm frame 50, an air inlet pipe 45 and a liquid inlet pipe 44. The liquid inlet pipe 44 is connected to the liquid delivery pump 31. The liquid inlet pipe 44 is laid at the bottom of the biological filter chamber 41. The liquid inlet pipe 44 is connected to the liquid outlet pipe 223. The liquid inlet pipe 44 includes a main pipe, a branch pipe connected to the main pipe and a connecting pipe connected to the main pipe. The number of the branch pipes is multiple, and the multiple branch pipes are arranged at intervals along the length direction of the connecting pipe. The branch pipe is provided with a liquid inlet hole 441 along its length direction.

[0051] See also Figure 4 and Figure 5 The biofilm rack 50 includes a main frame 51, a filling plate 52, a lower aeration pipe 56 and an upper aeration pipe 57. The number of the filling plates 52 is multiple, which are divided into a lower filling plate 53, a middle filling plate and an upper filling plate 58. The lower filling plate 53, the middle filling plate and the upper filling plate 58 are arranged on the main frame 51 from bottom to top in sequence. The branch pipe is arranged below the lower filling plate 53. The lower filling plate 53 is hung with a desulfurization bacteria growth biofilm. The air intake pipe 45 is fixedly connected to the lower filling plate 53. The air intake pipe 45 is connected to the air pump 32. The air intake pipe 45 includes a main air pipe, a branch air pipe connected to the main air pipe, and a diversion pipe connected to the main air pipe. The number of the branch air pipes is multiple, and the multiple branch air pipes are arranged at intervals along the length direction of the diversion pipe. The gas distribution pipe is provided with air outlet holes 451 at intervals along its length direction, and the air outlet holes 451 are aligned with the desulfurization bacteria growth biofilm. The lower aeration pipe 56 is fixedly connected to the lower filling plate 53, and the lower aeration pipe 56 is provided at the end of the lower filling plate 53 away from the air inlet pipe 45. The lower aeration pipe 56 is provided with lower aeration holes along its length direction, and the lower aeration holes are aligned with the desulfurization bacteria growth biofilm, so that the sulfur components in the odor can be quickly captured by the desulfurization bacteria growth biofilm; at the same time, the oxygen is adequately supplied, so that the desulfurization bacteria growth biofilm can quickly decompose the sulfur components into sulfate ions and sulfur, and the treatment effect is good.

[0052] See also Figure 4 and Figure 5There are two middle-layer filler plates, including a first middle-layer filler plate 54 and a second middle-layer filler plate 55. The upper aeration pipe 57 is arranged between the first middle-layer filler plate 54 and the second middle-layer filler plate 55. The second middle-layer filler plate 55 is arranged above the first middle-layer filler plate 54. The first middle-layer filler plate 54 is hung with a nitrite-producing biofilm, and the second middle-layer filler plate 55 is hung with a nitrifying bacteria growing biofilm. The upper aeration pipe 57 is provided with upper aeration holes along its length direction. The upper aeration holes are arranged at the upper and lower sides of the upper aeration pipe 57. The upper aeration holes located at the lower side are aligned with the upper aeration holes aligned with the nitrifying bacteria growing biofilm, and the upper aeration holes located at the upper side are aligned with the nitrifying bacteria growing biofilm.

[0053] See also Figure 4 and Figure 5 The upper filler plate 58 is arranged above the second middle filler plate 55, and a heterotrophic bacteria growth biofilm is hung on the upper filler plate 58. An air outlet 411 is arranged above the biological filter chamber 41, and the air outlet 411 is communicated with the exhaust chamber 42. The exhaust chamber 42 is provided with an exhaust pipe 421, and an exhaust valve 422 is arranged on the exhaust pipe 421.

[0054] See also Figure 4 and Figure 5 A liquid outlet 412 is disposed below the biological filter chamber 41 , and the liquid outlet 412 is communicated with the liquid storage chamber 43 . A liquid outlet valve 431 is disposed in the liquid storage chamber 43 , and the liquid outlet valve 431 is disposed at the liquid outlet 412 .

[0055] See also Figure 5 The biological deodorization principle of the biofilm rack 50 is as follows: the odorous water enters from the main pipe, is transported to the branch pipe through the connecting pipe, flows into the biological filter chamber 41 through the liquid inlet hole 441, and flows through the desulfurization bacteria growth biofilm, nitrite bacteria growth biofilm, nitrifying bacteria growth biofilm and heterotrophic bacteria growth biofilm from bottom to top ( Figure 5 (in the direction indicated by the arrow in C).

[0056] When the foul water covers the biofilm frame 50, the foul gas enters the main air pipe, is transported to the air distribution pipe through the shunt pipe, flows into the biofilter chamber 41 through the air outlet 451, and flows through the desulfurization bacteria growth biofilm, nitrite bacteria growth biofilm, nitrifying bacteria growth biofilm and heterotrophic bacteria growth biofilm from bottom to top ( Figure 5 (in the direction indicated by the arrow in B).

[0057] Oxygen (air) enters from the lower aeration pipe 56 and the upper aeration pipe 57, and flows out through the lower aeration hole and the upper aeration hole ( Figure 5The direction indicated by the arrow in A) forms an aerobic zone near the biofilm of desulfurization bacteria, the biofilm of nitrite bacteria and the biofilm of nitrifying bacteria, while an anaerobic zone forms near the biofilm of heterotrophic bacteria.

[0058] In this way, the sulfur components in the odor and odorous water are oxidized and decomposed into sulfate ions and sulfur under aerobic conditions in the biofilm of desulfurization bacteria, while the amine components in the odor and odorous water release NH 3 , NH 3 It can be oxidized into nitrite ions by nitrite-forming bacteria biofilm, and then further oxidized into nitrate ions by nitrifying bacteria biofilm. Organic substances that do not contain nitrogen in odor and odorous water are decomposed into carbon dioxide and water by heterotrophic bacteria biofilm.

[0059] Therefore, the biofilm frame 50 can simultaneously perform biological deodorization on odorous water and odorous gas without separate treatment, thus saving a biological filter tank and effectively reducing the cost of waste gas treatment.

[0060] Preferably, the lower filling plate 53, the middle filling plate and the upper filling plate 58 can be set to be detachably connected to the main frame 51, such as a guide rail is set on the main frame 51, and the lower filling plate 53, the middle filling plate and the upper filling plate 58 are placed in / pulled out of the main frame 51 along the guide rail.

[0061] Preferably, in order to facilitate cleaning or maintenance of the biofilm rack 50 , an opening may be provided on one side of the biofilter chamber 41 , and a sealing door may be provided at the opening, wherein the sealing door is hinged to the biofilter chamber 41 .

[0062] See also Figure 6 and Figure 7 The filling plate 52 includes a main board body 521, a frame 522, a filling monomer 523 and a fixed cover 524. The main board body 521 is integrally connected with a liquid inlet pipe 525. A liquid flow channel and a nozzle 5212 connected to the liquid flow channel are provided in the main board body 521. The liquid flow channel is connected to the liquid inlet pipe 525. The liquid flow channel includes a main channel and a branch channel 5211 connected to the main channel. The main channel is arranged along the length direction of the main board body 521, and the branch channel 5211 is arranged along the width direction of the main board body 521.

[0063] See also Figure 6 and Figure 7The main body 521 is provided with placement grooves 5213 adapted to the frame 522 at intervals along its width direction, and the placement grooves 5213 penetrate the main body 521. The lower aeration pipe 56, the upper aeration pipe 57 and the air inlet pipe 45 are correspondingly arranged in the middle of the placement grooves 5213. On the one hand, such a setting can make it easier for the biofilm to capture oxygen and odor, thereby enhancing the biofilm's treatment efficiency for odor; on the other hand, by increasing the aeration volume of the lower aeration pipe 56, the upper aeration pipe 57 and the air inlet pipe 45, the biofilm is flushed with the aeration airflow to keep the biofilm active.

[0064] See also Figure 6 and Figure 7 There are multiple sub-channels 5211, and the multiple sub-channels 5211 are grouped in pairs. Two sub-channels 5211 in a group are arranged on both sides of the placement groove 5213. The sub-channels 5211, the nozzles 5212 and the placement groove 5213 are interconnected. The nozzles 5212 are aligned with the filler monomers 523. On the one hand, the culture medium can be directly transported to the filler monomers 523 through the liquid flow channel, thereby allowing the corresponding biofilm to be hung on the filler monomers 523 more quickly; on the other hand, the biofilm on the filler monomers 523 can be flushed through the liquid flow channel, thereby keeping the biofilm active.

[0065] See also Figure 6 and Figure 7 The frame 522 is provided with a plurality of clamping columns 5221 in an array. The plurality of clamping columns 5221 are divided into two groups. The two groups of clamping columns 5221 are respectively provided at the upper and lower ends of the frame 522. The clamping columns 5221 include a main body and a clamping portion connected to the main body. The filler monomer 523 is sleeved outside the clamping portion, and the filler monomer 523 abuts against the main body. The clamping portion is axially provided with a fixing hole, and the fixing cover 524 is axially provided with a fixing column. The fixing column is clamped into the fixing hole. The fixing cover 524 is fixed on the clamping column 5221 to fix the filler monomer 523 on the clamping column 5221. The filler monomer 523 includes a filler ring and a fiber filament connected to the filler ring. The fiber filament is bound to the circumference of the filler ring, so that the bacteria in the culture solution are easily hung on the fiber filament, and the biofilm is generated on the filler monomer 523 more quickly.

[0066] See also Figure 7The waste gas treatment system 100 of the sewage treatment station also includes a liquid inlet device 140, which includes a flushing liquid storage tank 141, a culture liquid storage tank 142, a liquid switching valve 143 and a liquid inlet pump 144. The flushing liquid storage tank 141 and the culture liquid storage tank 142 are connected to the liquid inlet pump 144 through the liquid switching valve 143, and the liquid inlet pump 144 is connected to the liquid inlet pipe 525. The liquid switching valve 143 and the liquid inlet pump 144 are both electrically connected to the controller, so that the culture liquid is discharged from the culture liquid storage tank 141 at the initial stage of the culture. Tank 142 passes through the liquid switching valve 143, and after passing through the liquid inlet pipe 525 and the liquid flow channel under the transportation of the liquid inlet pump 144, it is sprayed out from the nozzle 5212, and the bacteria in the culture liquid are hung on the filler monomer 523, which effectively improves the culture efficiency of the biofilm; and when it is found that the treatment efficiency of the biofilm is reduced, the flushing liquid is from the flushing liquid storage tank 141 through the liquid switching valve 143, and after passing through the liquid inlet pipe 525 and the liquid flow channel under the transportation of the liquid inlet pump 144, it is sprayed out from the nozzle 5212 to flush the biofilm on the filler monomer 523 and maintain the dynamic growth of the biofilm.

[0067] See also Figure 1 The waste gas treatment system 100 of the sewage treatment station also includes a circulating pump 130. The liquid storage chamber 43 is provided with a circulating liquid pipe 432. The circulating liquid pipe 432 is connected to the spray pipe 23 through the circulating pump 130. In this way, there is no need to set up an additional spray liquid storage tank, which effectively reduces costs.

[0068] See also Figure 1 and Figure 8 The waste gas treatment system 100 of the sewage treatment station further includes a dosing device 60, which includes a drug storage tank 61, a dosing pump 62, a dosing valve 63 and a dosing flowmeter 64. The drug storage tank 61 is connected to the dosing pipe 221 through the dosing pump 62, and the dosing valve 63 and the dosing flowmeter 64 are arranged between the dosing pump 62 and the dosing pipe 221. In this embodiment, there are two dosing devices 60, and the drug storage tank 61 in one dosing device 60 mainly stores sodium hydroxide solution, and the drug storage tank 61 in the other dosing device 60 mainly stores hydrochloric acid solution.

[0069] See also Figure 1 The waste gas treatment system 100 of the sewage treatment station also includes a controller, and the delivery pump 12, the liquid delivery pump 31, the air delivery pump 32, the dosing pump 62 and the circulation pump 130 are all electrically connected to the controller.

[0070] See also Figure 1The waste gas treatment system 100 of the sewage treatment station further includes a pH sensor 70. The chemical washing chamber 22 is provided with a detection tube 224. The liquid inlet of the pH sensor 70 is connected to the detection tube 224. A detection valve 225 is provided between the pH sensor 70 and the detection tube 224. The pH sensor 70 is in communication with the controller. The controller controls the two dosing pumps 62 to work according to the pH value detected by the pH sensor 70.

[0071] When the pH value detected by the pH sensor 70 is 7, the controller controls the liquid pump 31 and the air pump 32 to send the odor and odorous water in the chemical washing chamber 22 into the biological deodorization device 40 for biological deodorization.

[0072] The waste gas treatment system 100 of the sewage treatment station also includes an odor detector 80. The exhaust chamber 42 is provided with a gas detection tube 423, and the gas detection tube 423 is connected to the odor detector 80. A gas detection valve 424 is provided on the gas detection tube 423. The odor detector 80 is communicatively connected to the controller, and the exhaust valve 422 is electrically connected to the controller. When the gas information detected by the odor detector 80 meets the emission standard, the controller controls the exhaust valve 422 to open the exhaust.

[0073] See also Figure 1 The waste gas treatment system 100 of the sewage treatment station further includes a recovery air pump 110 and a gas switching valve 120. The exhaust chamber 42 is provided with a recovery pipe 425, and the recovery pipe 425 is connected to the gas switching valve 120 through the recovery air pump 110. The gas switching valve 120 is arranged between the air supply pump 32 and the air intake pipe 45. The recovery pump and the gas switching valve 120 are both electrically connected to the controller. When the gas information detected by the odor detector 80 does not meet the emission standard, the controller controls the gas switching valve 120 to switch so that the recovery pipe 425 is connected to the air intake pipe 45. The recovery air pump 110 works to send the gas in the exhaust chamber 42 back to the biofilter chamber 41 through the air intake pipe 45 for reprocessing.

[0074] See also Figure 1 The waste gas treatment system 100 of the sewage treatment station also includes a water quality detector 90. The biological filter chamber 41 is provided with a water detection pipe 413, and the water detection pipe 413 is connected to the water quality detector 90. The water detection pipe 413 is provided with a water detection valve 414. The water quality detector 90 is communicatively connected to the controller, and the liquid outlet valve 431 is electrically connected to the controller. When the water quality monitor detects that the water quality information meets the emission standards, the controller controls the liquid outlet valve 431 to open so that the liquid in the biological filter chamber 41 enters the liquid storage chamber 43.

[0075] The working process of the waste gas treatment system 100 of the sewage treatment station described in this embodiment is as follows: the waste gas collected in the sewage treatment station is stored in the waste gas storage tank 11, the delivery pump 12 allows the waste gas in the waste gas storage tank 11 to enter the water washing chamber 21 through the air inlet pipe 211, the spray liquid is sprayed through the spray head 24 on the spray pipe 23, so that the waste gas can fully contact with the spray liquid, the ammonia, hydrogen sulfide and trimethylamine in the waste gas are dissolved in the spray liquid to form odorous water, and the odorous water enters the chemical washing chamber 22 through the outlet 212, the controller controls the dosing pump 62 to work, so that the drug is added to the odorous water, so that the pH value of the odorous water reaches 7; the controller controls the liquid delivery pump 31 to work, so as to deliver the odorous water into the biological filter tank, and wait until the odorous water covers the biofilm frame 50 When the controller controls the air pump 32 to work, the odor (composed of water-insoluble components in the exhaust gas) enters the biological filter tank through the air inlet pipe 45, and the odor and odorous water are processed from bottom to top by the desulfurization bacteria growth biofilm, the nitrite bacteria growth biofilm, the nitrifying bacteria growth biofilm and the heterotrophic bacteria growth biofilm to form liquid and gas. The gas enters the exhaust chamber 42 through the air outlet 411, and the liquid meets the emission standards after being detected by the water quality detector 90. The controller controls the liquid outlet valve 431 to open so that the liquid in the biological filter chamber 41 enters the liquid storage chamber 43; under the action of the circulating pump 130, the liquid in the liquid storage chamber 43 is transported to the spray pipe 23 as spray liquid.

[0076] The beneficial effects of the present invention are as follows: the stinky water covers the biofilm frame 50, so that the malodorous components corresponding to the stinky water can be decomposed by the corresponding biofilm, thereby realizing biological deodorization of the stinky water; and when the stinky water covers the biofilm frame 50, the odor enters from the air inlet pipe, and under the pressure of the stinky water, the odor can gradually move upward in the vertical direction, so that the odor is accurately delivered, and the contact area between the odor and the biofilm is increased to realize biological deodorization of the odor, so that the odor and the stinky water do not need to be treated separately, saving a biological filter tank and effectively reducing the cost of waste gas treatment; at the same time, the liquid after biological deodorization can be reused as a spray liquid, which can effectively save water resources and be more environmentally friendly; the waste gas treatment system 100 of the sewage treatment station has a high degree of automation and is more convenient to operate.

[0077] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A waste gas treatment system for a sewage treatment station, characterized in that: include: Waste gas recovery device, used to collect waste gas from sewage treatment plants; A washing tower is used to wash the exhaust gas to obtain odor and odorous water; The washing tower is provided with an air outlet pipe for outputting odor and a liquid outlet pipe for outputting odorous water; as well as A biological deodorization device is used for biological deodorization of odor and odorous water. The biological deodorization device includes a biological filter chamber, an exhaust chamber and a liquid storage chamber. The exhaust chamber is arranged above the biological filter chamber, and the liquid storage chamber is arranged below the biological filter chamber. A biofilm frame, an air inlet pipe and a liquid inlet pipe are arranged in the biological filter chamber. The air inlet pipe is connected to the air outlet pipe, and the liquid inlet pipe is connected to the liquid outlet pipe. The biofilm frame includes a main frame body, a filling plate, a lower aeration pipe and an upper aeration pipe. The number of the filling plates is multiple, which are divided into a lower filling plate, a middle filling plate and an upper filling plate. The lower filling plate The material plate, the middle-layer filler plate and the upper-layer filler plate are sequentially arranged on the main frame from bottom to top, the liquid inlet pipe is arranged below the lower-layer filler plate, the lower-layer filler plate is hung with a desulfurization bacteria growth biofilm, the air inlet pipe and the lower aeration pipe are respectively arranged at the upper and lower ends of the lower-layer filler plate, the number of the middle-layer filler plates is two, one of the middle-layer filler plates is hung with a nitrite bacteria growth biofilm, and the other middle-layer filler plate is hung with a nitrifying bacteria growth biofilm, the upper aeration pipe is arranged between the two middle-layer filler plates, and the upper-layer filler plate is hung with a heterotrophic bacteria growth biofilm.

2. The waste gas treatment system of a sewage treatment plant according to claim 1, characterized in that: The washing tower includes a water washing chamber and a chemical washing chamber arranged below the water washing chamber, a spray pipe is arranged in the water washing chamber, the spray pipe includes an outer ring pipe, a transverse arc pipe connected to the outer ring pipe and a longitudinal arc pipe connected to the outer ring pipe, the outer ring pipe is provided with the spray heads at circumferential intervals, the transverse arc pipe and the longitudinal arc pipe are arranged in the outer ring pipe, the transverse arc pipe and the longitudinal arc pipe are arranged crisscross, the transverse arc pipe and the longitudinal arc pipe are both concave downwards, the outer ring pipe, the transverse arc pipe and the longitudinal arc pipe are connected to each other, and the spray head is arranged at the intersection of the transverse arc pipe and the longitudinal arc pipe.

3. The waste gas treatment system of a sewage treatment plant according to claim 1, characterized in that: The middle-layer filler plate is divided into a first middle-layer filler plate and a second middle-layer filler plate, the upper aeration pipe is arranged between the first middle-layer filler plate and the second middle-layer filler plate, the second middle-layer filler plate is arranged above the first middle-layer filler plate, the first middle-layer filler plate is hung with a nitrite-producing biofilm, the second middle-layer filler plate is hung with a nitrifying bacteria growing biofilm, the upper aeration pipe is provided with upper aeration holes along its length direction, the upper aeration holes are arranged at the upper and lower sides of the upper aeration pipe, the upper aeration holes located at the lower side are aligned with the upper aeration holes and the nitrifying bacteria growing biofilm, and the upper aeration holes located at the upper side are aligned with the nitrifying bacteria growing biofilm.

4. The waste gas treatment system of a sewage treatment plant according to claim 3, characterized in that: The filler plate includes a main board body, a frame and a filler monomer. The main board body is provided with placement grooves at intervals along its width direction. The placement grooves penetrate the main board body. The frame is clamped in the placement grooves. The frame array is provided with a plurality of clamping columns. The plurality of clamping columns are divided into two groups. The two groups of clamping columns are respectively arranged at the upper and lower ends of the frame. The filler monomer is fixedly arranged on the clamping columns.

5. The waste gas treatment system of a sewage treatment plant according to claim 4, characterized in that: The main board body is integrally connected with a liquid inlet pipe, a liquid flow channel and a nozzle are arranged in the main board body, the liquid flow channel is connected with the liquid inlet pipe, the liquid flow channel includes a main channel and a branch channel connected to the main channel, the main channel is arranged along the length direction of the main board body, the branch channel is arranged along the width direction of the main board body, the number of the branch channels is multiple, the multiple branch channels are grouped in pairs, and the two branch channels in a group are arranged on both sides of the placement groove.

6. The waste gas treatment system of a sewage treatment plant according to claim 5, characterized in that: The packing monomer includes a packing ring and fiber filaments, and the fiber filaments are bound around the packing ring.

7. The waste gas treatment system of a sewage treatment plant according to claim 6, characterized in that: It also includes a liquid inlet device, which includes a flushing liquid storage tank, a culture liquid storage tank, a liquid switching valve and a liquid inlet pump. The flushing liquid storage tank and the culture liquid storage tank are connected to the liquid inlet pump through the liquid switching valve, and the liquid inlet pump is connected to the liquid inlet pipe.

8. The waste gas treatment system of a sewage treatment plant according to claim 2, characterized in that: It also includes a circulation pump, a recovery air pump and a gas switching valve. The circulating liquid pipe is connected to the spray pipe through the circulation pump. The exhaust chamber is provided with a recovery pipe, and the recovery pipe is connected to the gas switching valve through the recovery air pump. The gas switching valve is arranged between the outlet pipe and the inlet pipe.

9. The waste gas treatment system of a sewage treatment station according to claim 8, characterized in that: It also includes a dosing device, which includes a drug storage tank, a dosing pump, a dosing valve and a dosing flow meter. The drug storage tank is connected to the dosing pipe through the dosing pump, and the dosing valve and the dosing flow meter are arranged between the dosing pump and the dosing pipe.

10. The waste gas treatment system of a sewage treatment station according to claim 9, characterized in that: It also includes a pH sensor, an odor detector, a water quality detector and a controller. The pH sensor is connected to the chemical washing chamber, the odor detector is connected to the exhaust chamber, the water quality detector is connected to the biological filter chamber, the pH sensor, the odor detector and the water quality detector are communicatively connected to the controller, and the dosing pump, the circulation pump, the exhaust valve, the recovery air pump and the gas switching valve are all electrically connected to the controller.

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