Waste gas treatment system of sewage treatment station

Abstract

The present invention relates to a waste gas treatment system for a sewage treatment station, comprising a scrubbing tower and a biological deodorizing device; the scrubbing tower is provided with an air outlet pipe for outputting odor and a liquid outlet pipe for outputting odorous water; the biological deodorizing device comprises a biological filter chamber, the biological filter chamber is provided with a biofilm frame, an air inlet pipe, and a liquid inlet pipe, the air inlet pipe being connected to the air outlet pipe, the liquid inlet pipe being connected to the liquid outlet pipe, the biofilm frame comprising a main frame, a packing plate, a lower aeration pipe, and an upper aeration pipe, the packing plate being divided into a lower packing plate, a middle packing plate, and an upper packing plate, the lower packing plate, the middle packing plate, and the upper packing plate being arranged on the main frame in order from bottom to top, the liquid inlet pipe being arranged below the lower packing plate, the air inlet pipe and the lower aeration pipe being arranged at the upper and lower ends of the lower packing plate, and the upper aeration pipe being arranged between the two middle packing plates. The present invention can uniformly treat odorous gas and odorous water generated in the scrubbing chamber, eliminating the need for separate treatment, thereby saving a biological filter tank and effectively reducing the cost of waste gas treatment.

Description

Technical Field

[0001] The present 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 produced by the sewage treatment station mainly includes ammonia, hydrogen sulfide, methyl mercaptan, dimethyl sulfide, dimethyl disulfide, carbon disulfide, trimethylamine, styrene and other malodorous gases, which seriously affect the living environment of surrounding residents. Therefore, it is necessary to collect and treat the odor from the sewage treatment station to improve the quality of life of nearby residents.

[0003] Ammonia, hydrogen sulfide, and trimethylamine in the waste gas are soluble in water. Ammonia and trimethylamine are alkaline when dissolved in water, while hydrogen sulfide is acidic. Methyl mercaptan, methyl sulfide, dimethyl disulfide, carbon disulfide, and styrene are insoluble in water. Existing odor treatment systems typically include scrubbers and biofilters. After passing through the scrubbers, the waste gas forms odorous water and odorous gases, which then flow into separate biofilters for biological deodorization. This results in high costs for 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 for washing 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 located above the biological filter chamber, and the liquid storage chamber is located below the biological filter chamber. A biofilm frame, an air inlet pipe and a liquid inlet pipe are provided 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, a filler plate, a lower aeration pipe and an upper aeration pipe. The number of the filler plates is multiple. The lower filling plate, the middle filling plate and the upper filling plate are arranged on the main frame from bottom to top in sequence. The liquid inlet pipe is arranged below the lower filling plate. The lower filling plate is hung with a biofilm of desulfurization bacteria. The lower aeration pipe and the air inlet pipe are respectively arranged at the upper and lower ends of the lower filling plate. The air inlet pipe includes a main air pipe, a branch air pipe connected to the main air pipe and a shunt pipe connected to the main air pipe. The number of the branch air pipes is as follows: The number is multiple, and the multiple air distribution pipes are arranged at intervals along the length direction of the diversion pipe. The air distribution pipes are provided with air outlets at intervals along the length direction thereof, and the air outlets are aligned with the desulfurization bacteria growth biofilm. The lower aeration pipe is provided with lower aeration holes along the length direction thereof, and the lower aeration holes are aligned with the desulfurization bacteria growth biofilm. The middle filler plate is divided into a first middle filler plate and a second middle filler plate. The upper aeration pipe is provided between the first middle filler plate and the second middle filler plate, and the second middle filler plate is provided above the first middle filler plate. The first middle filler plate is hung with a nitrite bacteria growth biofilm, and the second middle filler plate is hung with a nitrifying bacteria growth biofilm. The upper aeration pipe is provided with upper aeration holes along the length direction thereof, and 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 nitrite bacteria growth biofilm, and the upper aeration holes located at the upper side are aligned with the nitrifying bacteria growth biofilm. The upper 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 located below the water washing chamber. A spray pipe and a spray head are provided 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 spray heads are arranged at circumferential intervals on the outer ring pipe. 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 crisscrossly, and the transverse arc pipe and the longitudinal arc pipe are both concave downward. The outer ring pipe, the transverse arc pipe and the longitudinal arc pipe are connected to each other, and the spray head is provided at the intersection of the transverse arc pipe and the longitudinal arc pipe.

[0010] As a preferred solution, the filler plate includes a main body, a frame and a filler unit. The main body is provided with placement grooves at intervals along its width direction. The placement grooves pass through the main 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 provided at the upper and lower ends of the frame. The filler unit is fixedly provided on the clamping columns.

[0011] As a preferred solution, the main board body is integrally connected with a liquid inlet pipe, and a liquid flow channel and a nozzle are provided in the main board body. The liquid flow channel is connected with the liquid inlet pipe, and 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, and the branch channel is arranged along the width direction of the main board body. There are multiple branch channels, and the multiple branch channels are grouped in twos. The two branch channels in a group are arranged on both sides of the placement groove.

[0012] As a preferred solution, the filler monomer includes a filler ring and fiber filaments, and the fiber filaments are bundled around the circumference of the filler ring.

[0013] As a preferred solution, 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.

[0014] 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 liquid storage chamber is provided with a circulating liquid pipe, and 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, and the gas switching valve is arranged between the outlet pipe and the inlet pipe.

[0015] As a preferred solution, 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. A dosing pipe is provided in the chemical washing chamber. The drug storage tank is connected to the dosing pipe through the dosing pump. The dosing valve and the dosing flow meter are arranged between the dosing pump and the dosing pipe.

[0016] 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 chemical washing chamber is provided with a detection tube, the liquid inlet of the pH sensor is connected to the detection tube, a detection valve is provided between the pH sensor and the detection tube, and the pH sensor is communicatively connected to the controller; the exhaust chamber is provided with a gas detection tube, the gas detection tube is connected to the odor detector, the gas detection tube is provided with a gas detection valve, and the odor detector is communicatively connected to the controller; the biological filter chamber is provided with a water detection tube, the water detection tube is connected to the water quality detector, the water detection tube is provided with a water detection valve, and the water quality detector is communicatively connected to the controller.

[0017] 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, and the contact area between the odor and the biofilm is increased to realize biological deodorization of the odor. In this way, the odor and the stinky water do not need to be treated separately, which saves a biological filter tank and effectively reduces the cost of waste gas treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of an exhaust gas treatment system for a sewage treatment station in one embodiment of the present invention;

[0019] 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;

[0020] 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;

[0021] Figure 4 for Figure 1 The internal structure diagram of the biofilm rack in the waste gas treatment system of the sewage treatment station shown in the width direction;

[0022] Figure 5 for Figure 1 The internal structure diagram of the biofilm rack in the waste gas treatment system of the sewage treatment station shown in the longitudinal direction;

[0023] 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;

[0024] Figure 7 for Figure 1The 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 is shown;

[0025] Figure 8 for Figure 1 The diagram shows the structure of the dosing device in the waste gas treatment system of the sewage treatment station.

[0026] The meanings of the numbers in the accompanying drawings are:

[0027] 100- Waste gas treatment system of sewage treatment station;

[0028] 10-waste gas recovery device, 11-waste gas storage tank, 12-delivery pump;

[0029] 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-spray pipe, 231-outer ring pipe, 232-horizontal arc pipe, 233-vertical arc pipe, 24-spray head;

[0030] 30- conveying device, 31- liquid pump, 32- air pump;

[0031] 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- Air inlet pipe, 451- Air outlet hole;

[0032] 50 - biofilm frame, 51 - main frame, 52 - filler plate, 521 - main body, 5211 - branch channel, 5212 - nozzle, 5213 - placement tank, 522 - frame, 5221 - clamping column 5221, 523 - filler unit, 524 - fixed cover, 525 - liquid inlet pipe, 53 - lower filler plate, 54 - first middle filler plate, 55 - second middle filler plate, 56 - lower aeration pipe, 57 - upper aeration pipe, 58 - upper filler plate;

[0033] 60-dosing device, 61-drug storage tank, 62-dosing pump, 63-dosing valve, 64-dosing flow meter;

[0034] 70-pH sensor;

[0035] 80-odor detector;

[0036] 90-water quality detector;

[0037] 110-recovery air pump;

[0038] 120-gas switching valve;

[0039] 130-circulation pump;

[0040] 140-liquid inlet device, 141-flushing liquid storage tank, 142-culture liquid storage tank, 143-liquid switching valve, 144-liquid inlet pump. DETAILED DESCRIPTION

[0041] The endpoints of the ranges and any values disclosed herein 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 endpoints of each range, the endpoints of each range and 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 to be specifically disclosed herein.

[0042] The following is a detailed description of the specific embodiments of the present invention. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0043] See also Figure 1 A waste gas treatment system 100 for a sewage treatment station according to one embodiment of the present invention includes 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 from 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, and the biological deodorization device 40 is used to biologically deodorize the odor and odorous water.

[0044] 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.

[0045] 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 connected to 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 horizontal 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 circumferentially spaced with spray heads 24. The horizontal arc pipe 232 and the longitudinal arc pipe 233 are arranged in the outer ring pipe 231. The horizontal arc pipe 232 and the longitudinal arc pipe 233 are crisscrossed. The horizontal arc pipe 232 and the longitudinal arc pipe 233 are both concave downwards. The outer ring pipe 231, the horizontal arc pipe 232 and 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. As a result, 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 trimethylammonia 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 relatively 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.

[0046] See also Figure 2 The end of the water washing chamber 21 away from the spray pipe 23 is funnel-shaped. The water washing chamber 21 is provided with an outlet 212, which is connected to 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. 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.

[0047] See also Figure 1 The conveying device 30 includes a liquid pump 31 and an air pump 32. The liquid pump 31 is arranged between the liquid outlet pipe 223 and the biological deodorization device, and the air pump 32 is arranged between the air outlet pipe 222 and the biological deodorization device 40.

[0048] See also Figure 3The biological deodorization device 40 includes a biological filter chamber 41, an exhaust chamber 42, and a liquid storage chamber 43. A biofilm rack 50, an air inlet pipe 45, and a liquid inlet pipe 44 are provided within the biological filter chamber 41. The liquid inlet pipe 44 is connected to the liquid delivery pump 31 and 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 branch pipes are spaced apart along the length of the connecting pipe. Each branch pipe is provided with a liquid inlet hole 441 along its length.

[0049] See also Figure 4 and Figure 5 The biofilm rack 50 includes a main frame 51, a filler plate 52, a lower aeration pipe 56 and an upper aeration pipe 57. The number of the filler plates 52 is multiple, which are divided into a lower filler plate 53, a middle filler plate and an upper filler plate 58. The lower filler plate 53, the middle filler plate and the upper filler plate 58 are arranged on the main frame 51 from bottom to top. The branch pipe is arranged below the lower filler plate 53. The lower filler plate 53 is hung with a desulfurization bacteria growth biofilm. The air intake pipe 45 is fixedly connected to the lower filler 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, and the air outlet holes 451 are aligned with the desulfurization bacteria biofilm. The lower aeration pipe 56 is fixedly connected to the lower packing plate 53. The lower aeration pipe 56 is located at the end of the lower packing plate 53 away from the air inlet pipe 45. The lower aeration pipe 56 is provided with lower aeration holes along its length, and the lower aeration holes are aligned with the desulfurization bacteria biofilm. In this way, sulfur components in the odor are quickly captured by the desulfurization bacteria biofilm. At the same time, the sufficient oxygen supply enables the desulfurization bacteria biofilm to quickly decompose sulfur components into sulfate ions and sulfur, and the treatment effect is good.

[0050] 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-growing 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 on the upper and lower sides of the upper aeration pipe 57. The upper aeration holes located at the bottom are aligned with the upper aeration holes aligned with the nitrite-growing biofilm, and the upper aeration holes located at the top are aligned with the nitrifying bacteria growing biofilm.

[0051] See also Figure 4 and Figure 5 The upper packing plate 58 is disposed above the second middle packing plate 55 and is covered with a biofilm of heterotrophic bacteria. An air outlet 411 is disposed above the biological filter chamber 41 and communicates with the exhaust chamber 42. The exhaust chamber 42 is provided with an exhaust pipe 421, which is equipped with an exhaust valve 422.

[0052] See also Figure 4 and Figure 5 A liquid outlet 412 is provided 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 provided in the liquid storage chamber 43 , and the liquid outlet valve 431 is provided at the liquid outlet 412 .

[0053] 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 441, and flows from bottom to top through the desulfurization bacteria growth biofilm, nitrite bacteria growth biofilm, nitrifying bacteria growth biofilm and heterotrophic bacteria growth biofilm ( Figure 5 (direction indicated by arrow C).

[0054] When the foul water covers the biofilm frame 50, the foul gas enters the main air pipe, is transported to the gas distribution pipe through the diversion pipe, and flows into the biofilter chamber 41 through the air outlet 451, and flows from bottom to top through the desulfurization bacteria growth biofilm, nitrite bacteria growth biofilm, nitrifying bacteria growth biofilm and heterotrophic bacteria growth biofilm ( Figure 5 (direction indicated by the arrow in B).

[0055] 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 A in the figure) forms an aerobic zone near the biofilms of desulfurization bacteria, nitrite bacteria and nitrifying bacteria, while an anaerobic zone forms near the biofilms of heterotrophic bacteria.

[0056] In this way, the sulfur components in the odor and odorous water are oxidized and decomposed into sulfate ions and sulfur under aerobic conditions by the desulfurization bacteria biofilm. The amine components in the odor and odorous water release NH3 through ammoniation. NH3 can be oxidized into nitrite ions by the nitrite bacteria biofilm, and then further oxidized into nitrate ions by the nitrifying bacteria biofilm. The organic matter without nitrogen in the odor and odorous water is decomposed into carbon dioxide and water by the heterotrophic bacteria biofilm.

[0057] Thus, the biofilm frame 50 can simultaneously perform biological deodorization on the odorous water and the odorous gas without separate treatment, thus saving a biological filter tank and effectively reducing the cost of waste gas treatment.

[0058] 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 setting a guide rail 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.

[0059] 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, the sealing door being hinged to the biofilter chamber 41 .

[0060] See also Figure 6 and Figure 7 The filler plate 52 includes a main body 521, a frame 522, a filler unit 523 and a fixed cover 524. The main body 521 is integrally connected to a liquid inlet pipe 525. A liquid flow channel and a nozzle 5212 connected to the liquid flow channel are provided in the main 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 body 521, and the branch channel 5211 is arranged along the width direction of the main body 521.

[0061] 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. The placement grooves 5213 run through 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, this arrangement 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 aeration airflow is used to flush the biofilm, so that the biofilm remains active.

[0062] See also Figure 6 and Figure 7 There are multiple sub-channels 5211, and the multiple sub-channels 5211 are grouped in pairs. The two sub-channels 5211 in a group are respectively 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.

[0063] See also Figure 6 and Figure 7 The frame 522 is arrayed with a plurality of clamping posts 5221, which are divided into two groups, one at the upper and lower ends of the frame 522. The clamping posts 5221 include a main body and a clamping portion connected to the main body. The filler elements 523 are fitted over the clamping portion, abutting 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 post, which is inserted into the fixing hole. The fixing cover 524 is fixed to the clamping posts 5221 to secure the filler elements 523 to the clamping posts 5221. The filler elements 523 include a packing ring and fiber filaments connecting the packing rings. The fiber filaments are bundled around the circumference of the packing rings. This allows bacteria in the culture medium to easily attach to the fiber filaments, accelerating the formation of a biofilm on the filler elements 523.

[0064] See also Figure 7The waste gas treatment system 100 of the sewage treatment station further 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. The tank 142 passes through the liquid switching valve 143, and is transported by the liquid inlet pump 144 through the liquid inlet pipe 525 and the liquid flow channel, and is then sprayed out from the nozzle 5212. The bacteria in the culture liquid are hung on the filler monomer 523, effectively improving the culture efficiency of the biofilm; and when it is found that the treatment efficiency of the biofilm is reduced, the flushing liquid passes through the liquid switching valve 143 from the flushing liquid storage tank 141, and is transported by the liquid inlet pump 144 through the liquid inlet pipe 525 and the liquid flow channel, and is then sprayed out from the nozzle 5212 to flush the biofilm on the filler monomer 523 and maintain the dynamic growth of the biofilm.

[0065] 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.

[0066] See also Figure 1 and Figure 8 The waste gas treatment system 100 for a 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 via the dosing pump 62, and the dosing valve 63 and the dosing flowmeter 64 are disposed between the dosing pump 62 and the dosing pipe 221. In this embodiment, there are two dosing devices 60. The drug storage tank 61 in one dosing device 60 primarily stores a sodium hydroxide solution, and the drug storage tank 61 in the other dosing device 60 primarily stores a hydrochloric acid solution.

[0067] See also Figure 1 The waste gas treatment system 100 of the sewage treatment station further 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.

[0068] See also Figure 1The waste gas treatment system 100 further includes a pH sensor 70. The chemical scrubbing 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 operation of the two dosing pumps 62 based on the pH value detected by the pH sensor 70.

[0069] 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.

[0070] 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 standards, the controller controls the exhaust valve 422 to open and exhaust.

[0071] 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, which is connected to the gas switching valve 120 through the recovery air pump 110. The gas switching valve 120 is provided 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 standards, 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 operates to send the gas in the exhaust chamber 42 back to the biological filter chamber 41 through the air intake pipe 45 for reprocessing.

[0072] 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.

[0073] 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 drives the waste gas in the waste gas storage tank 11 into 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 stinky water, and the stinky 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 stinky water, so that the pH value of the stinky water reaches 7; the controller controls the liquid delivery pump 31 to work, so as to deliver the stinky water into the biological filter, and wait until the stinky 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 through the air inlet pipe 45. 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 when 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.

[0074] The beneficial effects of the present invention are as follows: the foul water covers the biofilm frame 50, so that the malodorous components corresponding to the foul water can be decomposed by the corresponding biofilm, thereby realizing biological deodorization of the foul water; and when the foul water covers the biofilm frame 50, the odor enters from the air inlet pipe, and under the pressure of the foul 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 foul 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.

[0075] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0076] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended 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; The scrubber is used to wash the exhaust gas to obtain odor and odorous water; The scrubbing 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 located above the biological filter chamber, and the liquid storage chamber is located below the biological filter chamber. A biofilm frame, an air inlet pipe and a liquid inlet pipe are provided 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, a filler plate, a lower aeration pipe and an upper aeration pipe. The number of the filler plates is multiple. The lower filling plate, the middle filling plate and the upper filling plate are arranged on the main frame from bottom to top in sequence. The liquid inlet pipe is arranged below the lower filling plate. The lower filling plate is hung with a biofilm of desulfurization bacteria. The lower aeration pipe and the air inlet pipe are respectively arranged at the upper and lower ends of the lower filling plate. The air inlet pipe includes a main air pipe, a branch air pipe connected to the main air pipe and a shunt pipe connected to the main air pipe. The number of the branch air pipes is as follows: The number is multiple, and the multiple air distribution pipes are arranged at intervals along the length direction of the diversion pipe. The air distribution pipes are provided with air outlets at intervals along the length direction thereof, and the air outlets are aligned with the desulfurization bacteria growth biofilm. The lower aeration pipe is provided with lower aeration holes along the length direction thereof, and the lower aeration holes are aligned with the desulfurization bacteria growth biofilm. The middle filler plate is divided into a first middle filler plate and a second middle filler plate. The upper aeration pipe is provided between the first middle filler plate and the second middle filler plate, and the second middle filler plate is provided above the first middle filler plate. The first middle filler plate is hung with a nitrite bacteria growth biofilm, and the second middle filler plate is hung with a nitrifying bacteria growth biofilm. The upper aeration pipe is provided with upper aeration holes along the length direction thereof, and 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 nitrite bacteria growth biofilm, and the upper aeration holes located at the upper side are aligned with the nitrifying bacteria growth biofilm. The upper filler plate is hung with a heterotrophic bacteria growth biofilm.

2. The waste gas treatment system of a sewage treatment station 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 and a spray head are 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 and horizontally. The transverse arc pipe and the longitudinal arc pipe are both concave downward. The outer ring pipe, the transverse arc pipe and the longitudinal arc pipe are connected to each other. The spray head is provided at the intersection of the transverse arc pipe and the longitudinal arc pipe.

3. The waste gas treatment system of a sewage treatment station according to claim 2, characterized in that: The filler plate includes a main body, a frame and a filler unit. The main body is provided with placement grooves at intervals along its width direction. The placement grooves pass through the main 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 provided at the upper and lower ends of the frame. The filler unit is fixedly provided on the clamping columns.

4. The waste gas treatment system of a sewage treatment station according to claim 3, characterized in that: The main board body is integrally connected with a liquid inlet pipe, and a liquid flow channel and a nozzle are provided 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, and the branch channel is arranged along the width direction of the main board body. There are multiple branch channels, and the multiple branch channels are grouped in twos. The two branch channels in a group are arranged on both sides of the placement groove.

5. The waste gas treatment system of a sewage treatment station according to claim 4, characterized in that: The packing unit includes a packing ring and fiber filaments, and the fiber filaments are bundled around the packing ring.

6. The waste gas treatment system of a sewage treatment station according to claim 5, 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.

7. The waste gas treatment system of a sewage treatment station according to claim 2, characterized in that: It also includes a circulation pump, a recovery air pump and a gas switching valve. The liquid storage chamber is provided with a circulation liquid pipe, and the circulation 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.

8. The waste gas treatment system of a sewage treatment station according to claim 7, 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. A dosing pipe is provided in the chemical washing chamber. The drug storage tank is connected to the dosing pipe through the dosing pump. The dosing valve and the dosing flow meter are provided between the dosing pump and the dosing pipe.

9. The waste gas treatment system of a sewage treatment station according to claim 8, characterized in that: It also includes a pH sensor, an odor detector, a water quality detector and a controller. The chemical washing chamber is provided with a detection tube. The liquid inlet of the pH sensor is connected to the detection tube. A detection valve is provided between the pH sensor and the detection tube. The pH sensor is communicatively connected to the controller; the exhaust chamber is provided with a gas detection tube. The gas detection tube is connected to the odor detector. A gas detection valve is provided on the gas detection tube. The odor detector is communicatively connected to the controller; the biological filter chamber is provided with a water detection tube. The water detection tube is connected to the water quality detector. The water detection tube is provided with a water detection valve. The water quality detector is communicatively connected to the controller.

Images