SBBR reaction tank-based sewage treatment device

Abstract

This utility model discloses a wastewater treatment device based on an SBBR reactor, belonging to the field of SBBR reactor technology. It solves the problem of excessive number of cycles for the same batch of water when treating wastewater using an SBBR reactor in existing technologies. Specifically, it includes an SBBR reactor, with its effluent end connected to a sludge tank via a sludge pipe. The top of the sludge tank is connected to an equalization tank via an overflow pipe. The equalization tank is connected to an evaporator via a delivery pipe, and the bottom of the evaporator is connected to the SBBR reactor via a return pipe. In this utility model, wastewater undergoes nutrient removal (such as phosphorus and nitrogen) in the reactor, then enters the sludge tank for sedimentation. After sedimentation, the supernatant flows to the equalization tank via the overflow pipe and is then transported to the evaporator via the delivery pipe for evaporation. During evaporation, solutes such as nitrogen and phosphorus in the supernatant cannot evaporate with the water vapor and remain in the mother liquor after evaporation, which is then transported back to the reactor via the return pipe for the next cycle.

Description

Technical Field

[0001] This utility model relates to the field of SBBR reactor technology, and in particular to a wastewater treatment device based on an SBBR reactor. Background Technology

[0002] SBBR (Site-Based Bioreactor) reactors are a common wastewater treatment method. Their working principle involves cyclical stages of influent, reaction, sedimentation, effluent discharge, and idle period to achieve biological wastewater treatment. During the reaction stage, organic matter in the wastewater is degraded by microorganisms on the biofilm, while nitrification and denitrification occur, removing nutrients such as nitrogen and phosphorus. Under the action of nitrifying and denitrifying bacteria, organic nitrogen undergoes ammonification, nitrification, and denitrification reactions, decomposing nitrogenous organic matter in the wastewater into N2, which is then released into the atmosphere. Sufficient carbon sources must be maintained during this biological nitrogen and phosphorus removal process to sustain the microorganisms and enable them to complete the various reactions.

[0003] In the SBBR process, five steps are completed within the reactor: influent, reaction (anaerobic, aerobic, anoxic), sedimentation, effluent, and idle. Each batch of water treated constitutes one cycle, and after one cycle is completed, the next cycle begins, and so on. However, in actual treatment, it was found that simply circulating a batch of water for one or more cycles does not necessarily meet the treatment standards. Testing of the supernatant overflowing from the sludge tank revealed the continued presence of impurities. If multiple cycles are then repeated to treat the same batch of water, the treatment time becomes too long, resulting in excessively high costs. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a sewage treatment device based on SBBR reactor, which solves the problem of the same batch of water being circulated and treated many times when treating sewage based on SBBR reactor.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A wastewater treatment device based on an SBBR reactor includes an SBBR reactor, the effluent end of which is connected to a sludge tank via a sludge pipe; the top of the sludge tank is connected to an equalization tank via an overflow pipe; the equalization tank is connected to an evaporator via a liquid transfer pipe, and the bottom of the evaporator is connected to the SBBR reactor via a return pipe; a blower assembly is also connected to the SBBR reactor.

[0007] In this scheme, the equalization tank is connected to the evaporator via a feed pipe, and the bottom of the evaporator is connected back to the SBBR reactor via a return pipe. With the addition of the evaporator, when treating the same batch of wastewater, nutrients such as phosphorus and nitrogen are removed in the SBBR reactor, and then the wastewater enters the sludge tank for sedimentation. After the sludge settles, the supernatant flows to the equalization tank through an overflow pipe, and then is transported to the evaporator for evaporation via a feed pipe. During the evaporation process, solutes such as nitrogen and phosphorus in the supernatant cannot evaporate with the water vapor, so they remain in the mother liquor and are then transported back to the SBBR reactor for the next cycle of treatment via the return pipe. This treatment method allows a portion of the water to be evaporated through the evaporator after one cycle of treatment, avoiding repeated cycles of the same batch of water, shortening the treatment time, and significantly improving wastewater treatment efficiency.

[0008] Furthermore, the evaporator includes an evaporating kettle, around which an annular pipe is arranged, the end of which is connected to the liquid delivery pipe; several water spray pipes are arranged inside the annular pipe, the spray ends of which penetrate into the interior of the evaporating kettle; a hot air pipe is arranged at the bottom of the evaporating kettle, and several air outlets are opened at the top of the hot air pipe; the hot air pipe passes through the side wall of the evaporating kettle and is connected to an air preheater, which is connected to a fan assembly through a secondary air duct; a condenser pipe is connected to the top of the evaporating kettle, the other end of which is used to connect to a condenser.

[0009] In this design, the supernatant is transported from the infusion pipe to the annular pipeline and sprayed out from the water spray pipe inside the annular pipeline into the evaporation kettle. At the same time, the fan assembly provides airflow through the secondary air duct. The airflow is heated into hot air after passing through the air preheater. The hot air is blown out from the air outlet to heat the supernatant sprayed into the evaporation kettle, accelerating its evaporation. The evaporated water vapor enters the condenser through the condenser tube and is condensed. This design uses hot air to heat and disperse the supernatant. The supernatant is in the form of droplets, with a large contact area with the hot air and a fast evaporation rate.

[0010] Furthermore, several baffles are installed on the top of the evaporator.

[0011] In this design, the baffle plate prevents the unevaporated supernatant from being blown into the condenser tube by hot air, allowing the unevaporated portion to flow back to the bottom of the evaporator and then back to the reaction tank through the reflux pipe; ensuring that only water vapor can pass through the baffle plate into the condenser tube.

[0012] Furthermore, a delivery pump is installed inside the equalization tank, and the delivery pump is connected to an infusion pipe located at one end inside the equalization tank.

[0013] In this design, the delivery pump is designed to provide water pressure to the supernatant inside the delivery pipe, causing it to be sprayed out of the spray pipe and dispersed more widely when sprayed.

[0014] Furthermore, the blower assembly includes aeration blower one and aeration blower two. The air outlets of aeration blower one and aeration blower two are connected to the aeration device inside the SBBR reactor through a primary air duct. The air outlets of aeration blower one and aeration blower two are also connected to the air inlet of the air preheater through a secondary air duct.

[0015] In this scheme, when the anaerobic reaction is carried out inside the SBBR reactor, aeration blower one and aeration blower two are started to provide aeration air to the reactor; when the supernatant is evaporated, aeration blower one and aeration blower two are started to provide hot air to the evaporator.

[0016] Furthermore, a first valve is installed on the primary air duct; a second valve is installed on the secondary air duct.

[0017] In this scheme, the first valve is closed when hot air is supplied, and the second valve is closed when aeration air is supplied; thus, the same set of fans is used to intermittently supply air to the evaporator and the reaction tank.

[0018] Furthermore, a sludge pump is installed on the sludge pipe; a return pump is installed on the return pipe.

[0019] Furthermore, it also includes a controller and a frequency converter, with the controller electrically connected to the frequency converter, and the frequency converter electrically connected to aeration fan one and aeration fan two respectively.

[0020] In this scheme, frequency converters are used to start aeration blower one and aeration blower two, enabling them to supply air under various operating conditions.

[0021] The beneficial effects of this utility model are:

[0022] In the wastewater treatment device based on the SBBR reactor provided by this utility model, the equalization tank is connected to the evaporator through a liquid delivery pipe, and the bottom of the evaporator is connected back to the SBBR reactor through a return pipe. Compared with the existing technology where the equalization tank is directly connected back to the SBBR reactor, an evaporator is added. When treating the same batch of wastewater, the wastewater removes nutrients such as phosphorus and nitrogen in the SBBR reactor, and then enters the sludge tank for sedimentation. After the sludge has settled, the supernatant flows to the equalization tank through the overflow pipe, and then is transported to the evaporator for evaporation through the liquid delivery pipe. During evaporation, the supernatant is first transported from the delivery pipe to the annular pipeline and then sprayed into the evaporation kettle from the spray pipe inside the annular pipeline. Simultaneously, the blower assembly provides cold air through a secondary air duct. This cold air is heated into hot air after passing through an air preheater and is blown out from the hot air duct outlet to heat the supernatant sprayed into the evaporation kettle, accelerating its evaporation. The evaporated water vapor enters the condenser through the condenser tube and condenses. Solutes such as nitrogen and phosphorus in the supernatant cannot evaporate with the water vapor and remain in the mother liquor after evaporation. Finally, the mother liquor is transported back to the SBBR reactor through the return pipe for the next cycle of treatment. This treatment method allows a portion of the water from the same batch of water to be evaporated after one cycle of treatment, avoiding repeated recycling of the same batch of water, shortening the treatment time, and significantly improving wastewater treatment efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a wastewater treatment device based on an SBBR reactor according to this utility model.

[0024] Figure label:

[0025] 1. SBBR reactor; 11. Aeration device; 12. Sludge pump; 13. Return pump; 2. Sludge tank; 3. Overflow pipe; 4. Equalization tank; 41. Transfer pump; 5. Liquid transfer pipe; 6. Evaporator; 61. Evaporation kettle; 62. Circular pipeline; 63. Water spray pipe; 64. Hot air pipe; 65. Air preheater; 66. Baffle plate; 67. Condenser; 71. Aeration blower one; 72. Aeration blower two; 73. First valve; 74. Second valve; 8. Controller; 9. Frequency converter; Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The specific embodiments of the present invention are described below to facilitate understanding by those skilled in the art. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they fall within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0027] like Figure 1 As shown, this embodiment provides a wastewater treatment device based on an SBBR reactor, specifically including: an SBBR reactor 1, a sludge tank 2, an equalization tank 4, an evaporator 6, and a blower assembly;

[0028] The effluent end of the SBBR reactor 1 is connected to the sludge tank 2 via a sludge pipe; the top of the sludge tank 2 is connected to the equalization tank 4 via an overflow pipe 3; the equalization tank 4 is connected to the evaporator 6 via a liquid transfer pipe 5; the bottom of the evaporator 6 is connected to the SBBR reactor 1 via a return pipe; and a blower assembly is also connected to the SBBR reactor 1.

[0029] Evaporator 6 includes an evaporating vessel 61, around which an annular pipe 62 is arranged, the annular pipe 62 being connected to the end of the liquid delivery pipe 5; several water spray pipes 63 are arranged inside the annular pipe 62, the spray ends of the several water spray pipes 63 penetrating into the interior of the evaporating vessel 61; a hot air pipe 64 is arranged at the bottom of the evaporating vessel 61, and several air outlets are opened at the top of the hot air pipe 64; the hot air pipe 64 penetrates the side wall of the evaporating vessel 61 and is connected to an air preheater 65, the air preheater 65 being connected to a fan assembly through a secondary air duct; a condenser pipe 67 is connected to the top of the evaporating vessel 61, the other end of the condenser pipe 67 being used to connect to a condenser. The supernatant is transported from the infusion pipe 5 to the annular pipe 62 and sprayed out from the water spray pipe 63 inside the annular pipe 62 into the evaporator 61. At the same time, the fan assembly provides cold air through the secondary air duct. The cold air is heated into hot air after passing through the air preheater 65. The hot air is blown out from the air outlet to heat the supernatant sprayed into the evaporator 61 and accelerate its evaporation. The evaporated water vapor enters the condenser through the condenser pipe 67 and is condensed. After condensation, it is collected for post-processing. The condenser is not shown in the figure.

[0030] Several baffles 66 are installed on the top of the evaporator 61. The baffles 66 can prevent the supernatant that has not been evaporated from being blown into the condenser tube 67 by hot air, so that the unevaporated part flows back to the bottom of the evaporator 61 and flows back to the reaction tank through the return pipe. This ensures that only water vapor can pass through the baffles 66 and enter the condenser tube 67.

[0031] A transfer pump 41 is installed inside the equalization tank 4, and the transfer pump 41 is connected to the infusion pipe 5 located at one end inside the equalization tank 4. The transfer pump 41 is designed to provide water pressure to the supernatant inside the infusion pipe, so that it is sprayed out from the spray pipe 63 and is more dispersed when sprayed.

[0032] The blower assembly includes an aeration blower 71 and an aeration blower 72. The outlets of the aeration blowers 71 and 72 are connected to the aeration device 11 inside the SBBR reactor 1 via a primary air duct. The outlets of the aeration blowers 71 and 72 are also connected to the inlet of the air preheater 65 via a secondary air duct. A first valve 73 is installed on the primary air duct, and a second valve 74 is installed on the secondary air duct.

[0033] During the anaerobic reaction inside the SBBR reactor, the first valve 73 is opened and the second valve 74 is closed, and the first aeration fan 71 and the second aeration fan 72 are started to provide aeration air to the reactor.

[0034] During supernatant evaporation, the first valve 73 is closed and the second valve 74 is opened, and aeration fans 71 and 72 are started to provide hot air to the evaporator 6. In actual operation, the same sections of the primary and secondary air ducts can use the same piping, saving costs.

[0035] A sludge pump 12 is installed on the sludge pipe; a return pump 13 is installed on the return pipe.

[0036] The wastewater treatment device based on the SBBR reactor in this embodiment also includes a controller 8 and a frequency converter 9. The controller 8 is electrically connected to the frequency converter 9, and the frequency converter 9 is electrically connected to aeration fan 71 and aeration fan 72, respectively. When hot air is provided, the frequency converter 9 drives aeration fan 71 and aeration fan 72 to operate at high frequency. When aeration air is provided, the frequency converter starts aeration fan 71 and aeration fan 72 according to the type of reaction inside the SBBR reactor 1.

[0037] The working principle of this embodiment is as follows:

[0038] In this embodiment, the wastewater treatment device based on the SBBR reactor removes nutrients such as phosphorus and nitrogen in the SBBR reactor 1, and then enters the sludge tank 2 for sedimentation. After the sludge has settled, the supernatant flows through the overflow pipe 3 to the equalization tank 4, and then through the liquid transfer pipe 5 to the evaporator 6 for evaporation.

[0039] During evaporation, the supernatant is first transported from the delivery pipe 5 to the annular pipe 62, and then sprayed out from the water spray pipe 63 inside the annular pipe 62 into the evaporation kettle 61. At the same time, the fan assembly provides cold air through the secondary air duct. The cold air is heated into hot air after passing through the air preheater 65. The hot air is blown out from the air outlet of the hot air pipe 64 to heat the supernatant sprayed into the evaporation kettle 61, accelerating its evaporation. The evaporated water vapor enters the condenser through the condenser pipe 67 and is condensed. However, solutes such as nitrogen and phosphorus in the supernatant cannot evaporate with the water vapor, so they remain in the mother liquor after evaporation. Finally, the mother liquor is transported back to the SBBR reactor 1 through the return pipe for the next cycle of treatment.

[0040] Those skilled in the art will recognize that the embodiments described herein are intended to help the reader understand the principles of this invention, and should be understood that the scope of protection of this invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on these technical teachings disclosed in this invention without departing from the essence of this invention, and these modifications and combinations are still within the scope of protection of this invention.

Claims

1. A wastewater treatment device based on an SBBR reactor, characterized in that: The system includes an SBBR reactor (1), the effluent end of which is connected to a sludge tank (2) via a sludge pipe; the top of the sludge tank (2) is connected to an equalization tank (4) via an overflow pipe (3); the equalization tank (4) is connected to an evaporator (6) via a liquid delivery pipe (5), and the bottom of the evaporator (6) is connected to the SBBR reactor (1) via a return pipe; a blower assembly is also connected to the SBBR reactor (1).

2. The wastewater treatment device based on an SBBR reactor according to claim 1, characterized in that: The evaporator (6) includes an evaporation vessel (61), and an annular pipe (62) is arranged around the evaporation vessel (61). The annular pipe (62) is connected to the end of the infusion pipe (5). A plurality of water spray pipes (63) are arranged inside the annular pipe (62), and the spray ends of the plurality of water spray pipes (63) penetrate into the interior of the evaporation vessel (61). The bottom of the evaporator (61) is provided with a hot air pipe (64), and the top of the hot air pipe (64) is provided with several air outlets; the hot air pipe (64) passes through the side wall of the evaporator (61) and is connected to the air preheater (65), and the air preheater (65) is connected to the fan assembly through a secondary air duct. The top of the evaporator (61) is connected to a condenser tube (67), and the other end of the condenser tube (67) is used to connect to a condenser.

3. The wastewater treatment device based on an SBBR reactor according to claim 2, characterized in that: Several baffles (66) are installed on the top of the evaporator (61).

4. The wastewater treatment device based on an SBBR reactor according to claim 2, characterized in that: The regulating tank (4) is equipped with a delivery pump (41), which is connected to one end of the infusion pipe (5) located inside the regulating tank (4).

5. The wastewater treatment device based on an SBBR reactor according to claim 2, characterized in that: The blower assembly includes an aeration blower one (71) and an aeration blower two (72). The air outlets of the aeration blower one (71) and the aeration blower two (72) are connected to the aeration device (11) inside the SBBR reactor (1) through a primary air duct. The air outlets of the aeration blower one (71) and the aeration blower two (72) are also connected to the air inlet of the air preheater (65) through a secondary air duct.

6. The wastewater treatment device based on an SBBR reactor according to claim 5, characterized in that: A first valve (73) is installed on the primary air duct; a second valve (74) is installed on the secondary air duct.

7. The wastewater treatment device based on an SBBR reactor according to any one of claims 2 to 6, characterized in that: A sludge pump (12) is installed on the sludge pipe; a return pump (13) is installed on the return pipe.

8. The wastewater treatment device based on an SBBR reactor according to any one of claims 5 to 6, characterized in that: It also includes a controller (8) and a frequency converter (9), the controller (8) being electrically connected to the frequency converter (9), and the frequency converter (9) being electrically connected to the first aeration fan (71) and the second aeration fan (72) respectively.

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