Up-flow sulfur autotrophic denitrification moving bed bio-membrane reactor based on powdered sulfur

Abstract

The utility model relates to the technical field of sulfur autotrophic denitrification reactors, and particularly discloses an up-flow sulfur autotrophic denitrification moving bed bio-membrane reactor based on powdered sulfur, which comprises a reactor shell, a settling area is arranged at the lower part in the reactor shell, a reaction area is fixed in the middle of the reactor shell, and a water inlet is formed in the reactor shell. An interception silk screen is fixed at the top of the reaction area, the reaction area is filled with powdered sulfur and suspended filler, a guide cylinder is fixed on the reactor shell on the outer side of the reaction area, the guide cylinder is used for guiding waste water overflowing from the reaction area, a water distributor is arranged at the lower part in the reaction area, and the water distributor is used for distributing water. The output end of the water distributor is arranged towards the lower part of the reaction area, a reflux pump is arranged on one side of the reactor shell, and the reflux pump is used for pumping part of effluent back to the reaction area so as to improve the hydraulic stirring strength; according to the utility model, the wastewater treatment efficiency and the purification effect can be improved, and the treatment cost is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to sulfur autotrophic denitrification reactor technical field, concretely relates to the upflow sulfur autotrophic denitrification moving bed biofilm reactor based on powder sulfur. BACKGROUND

[0002] Sulfur autotrophic denitrification process adopts fixed bed type denitrification biological filter, and its core is sulfur filler. The process discards the dependence on external organic carbon source, effectively reduces organic matter residue, and has lower operation cost, less sludge quantity, and is suitable for treating C / N low wastewater. Under anaerobic / anoxic condition, sulfur autotrophic denitrification process is driven by denitrifying desulfurization bacteria, which uses inorganic carbon source (such as CO3 2- , HCO 3- , CO2) as energy source, uses reduced sulfur (such as S 0 , pyrite, Na2S, Na2S2O3, H2S, etc.) as electron donor, reduces nitrate (NO 3- ) or nitrite (NO 2- ) as electron acceptor to nitrogen (N2), and reduces the state sulfur into sulfate, realizes effective removal of nitrogen and oxidation cycle of sulfur.

[0003] Most of the sulfur fillers on the market have large particle size (3-10mm), small specific surface area, small contact area with denitrifying bacteria, and need long biological solid residence time and low surface load, resulting in slow reaction speed and low efficiency of the system. Although the powder sulfur filler has large specific surface area and large contact area with microorganisms, it has high treatment efficiency and low manufacturing cost, but the powder sulfur and denitrifying bacteria are easy to be lost with effluent, resulting in low utilization rate and limiting its application.

[0004] Therefore, the skilled person in the art provides the upflow sulfur autotrophic denitrification moving bed biofilm reactor based on powder sulfur to solve the problems in the above background. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing the upflow sulfur autotrophic denitrification moving bed biofilm reactor based on powder sulfur, and solves the following technical problems:

[0006] How to solve the problem that the powder sulfur and denitrifying bacteria are easy to be lost with effluent, resulting in low utilization rate, reduce treatment cost, and improve wastewater treatment efficiency and purification effect.

[0007] The purpose of the utility model can be realized by the following technical solutions:

[0008] The powder sulfur-based upflowing sulfur autotrophic denitrification moving bed biofilm reactor comprises a reactor shell, a sedimentation zone arranged below in the reactor shell, a reaction zone fixed in the middle of the reactor shell, a blocking wire mesh fixed at the top of the reaction zone, powder sulfur and suspended fillers filled in the reaction zone, a flow guide cylinder fixed outside the reactor shell at the reaction zone, and the flow guide cylinder is used for guiding the overflowed wastewater in the reaction zone.

[0009] A water distributor is arranged below in the reaction zone, the output end of the water distributor is arranged below the reaction zone, a reflux pump is arranged on one side of the reactor shell, and the reflux pump is used for pumping part of the effluent back to the reaction zone to increase the hydraulic stirring intensity.

[0010] Further, a circulating pump is arranged on one side of the reactor shell, a circulating water inlet pipe is communicated between the output end of the circulating pump and the reactor shell, a circulating water outlet pipe is communicated between the input end of the circulating pump and the reactor shell, and one end of the circulating water inlet pipe is communicated with the water distributor.

[0011] Further, the sedimentation zone and the reaction zone are both in the shape of a variable-diameter cylinder which is wide at the top and narrow at the bottom, so as to promote the sedimentation of the powder sulfur.

[0012] Further, a water outlet pump is arranged on one side of the reactor shell, a water outlet pipe is communicated between the input end of the water outlet pump and the reactor shell, a water outlet tank is communicated with the output end of the water outlet pump, and the output end of the water outlet tank is communicated with the input end of the reflux pump.

[0013] Further, a raw material tank and a water inlet tank are arranged on one side of the reactor shell, and a stirrer is rotatably connected in each of the raw material tank, the water inlet tank and the water outlet tank, and the raw material tank and the water inlet tank are connected with liquid level controllers.

[0014] Further, a water inlet pump is arranged between the water inlet tank and the raw material tank, the input end of the water inlet pump is connected with the water inlet tank, the output end of the water inlet pump is connected with a heat exchanger, one side of the reactor shell is provided with a water inlet pipe, and the heat exchanger is communicated with the water inlet pipe.

[0015] Further, a feeding pump is arranged between the raw material tank and the reactor shell, the input end of the feeding pump is communicated with the raw material tank, the output end of the feeding pump is communicated with the water inlet pipe, and one end of the water inlet pipe is communicated with the water distributor.

[0016] Further, temperature controllers are connected with one side of the heat exchanger and one side of the reactor shell.

[0017] The beneficial effects of the utility model are as follows:

[0018] The utility model discloses a mobile bed biological membrane reactor of upflow type sulfur autotrophic denitrification, which is provided with a variable-diameter settling zone, is favorable for the precipitation of powder sulfur, and has the following advantages: the density of the suspended filler in the mobile bed biological membrane reactor is close to water, which can be fully mixed with sewage under hydraulic stirring to achieve complete reaction; the specific surface area of the suspended filler is large, and the loss of denitrifying bacteria can be avoided by fixing and growing microorganisms in the filler, thereby improving the biomass of the system and enhancing the purification effect; and in the wastewater treatment process, powder sulfur can be directly used without the need of being made into sulfur particles, which can greatly reduce the treatment cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model will be further described below with reference to the drawings.

[0020] Fig. 1 is the process flow chart of the utility model;

[0021] Fig. 2 is the internal connection structure schematic diagram of the reactor shell of the utility model.

[0022] Reference signs:

[0023] 1, reactor shell;2, stirrer;3, liquid level controller;4, water inlet pump;5, flow meter;6, heat exchanger;7, temperature controller;8, raw material tank;9, water inlet tank;10, feeding pump;11, settling zone;12, reaction zone;13, intercepting wire mesh;14, flow guide cylinder;15, circulating pump;16, water outlet pump;17, water outlet tank;18, water inlet pipe;19, backflow pump;20, water distributor;21, circulating water inlet pipe;22, circulating water outlet pipe;23, water outlet pipe. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Embodiment one

[0026] Please refer to the drawings Figs. 1-2The utility model discloses an upflow type sulfur autotrophic denitrification moving bed biofilm reactor based on powder sulfur, which comprises a reactor shell 1, characterized in that a settling zone 11 is arranged below the reactor shell 1, a reaction zone 12 is fixed in the middle of the reactor shell 1, the bottom of the settling zone 11 and the reaction zone 12 are both in the shape of a variable-diameter cylinder that is wide at the top and narrow at the bottom, which is used for promoting the precipitation of powder sulfur, an intercepting wire mesh 13 is fixed at the top of the reaction zone 12, powder sulfur and suspended filler are filled in the reaction zone 12, the intercepting wire mesh 13 is used for intercepting the suspended filler filled in the reaction zone 12, and denitrifying bacteria are fixed and grown on the suspended filler. In the reactor, powder sulfur can be directly used, and it is not necessary to make sulfur particles, so that the treatment cost can be greatly reduced. The density of the suspended filler in the moving bed biofilm reactor is close to that of water, and the suspended filler can be fully mixed with sewage under hydraulic stirring to achieve complete reaction. The specific surface area of the suspended filler is large, and the fixed growth of microorganisms in the filler can avoid the loss of denitrifying bacteria, thereby improving the biomass of the system and enhancing the purification effect. The reactor shell 1 is fixed with a flow guide cylinder 14 outside the reaction zone 12, and the flow guide cylinder 14 is used for guiding the overflow of wastewater in the reaction zone 12.

[0027] A water distributor 20 is arranged below the reaction zone 12, the output end of the water distributor 20 is arranged below the reaction zone 12, a reflux pump 19 is arranged on one side of the reactor shell 1, the reflux pump 19 is used for pumping part of effluent back to the reaction zone 12 to improve the hydraulic stirring intensity, and the suspended filler can be fully mixed with sewage to achieve complete reaction, and the reflux pump 19 can replace the traditional MBBR process aeration to make the suspended filler flow, so as to maintain an anaerobic environment.

[0028] Embodiment two

[0029] On the basis of embodiment one, refer to the accompanying drawings Figs. 1-2 A circulating pump 15 is arranged on one side of the reactor shell 1, a circulating water inlet pipe 21 is in communication between the output end of the circulating pump 15 and the reactor shell 1, a circulating water outlet pipe 22 is in communication between the input end of the circulating pump 15 and the reactor shell 1, and one end of the circulating water inlet pipe 21 is in communication with the water distributor 20.

[0030] An effluent pump 16 is arranged on one side of the reactor shell 1, an effluent pipe 23 is in communication between the input end of the effluent pump 16 and the reactor shell 1, an effluent tank 17 is in communication with the output end of the effluent pump 16, and the output end of the effluent tank 17 is in communication with the input end of the reflux pump 19.

[0031] A raw material tank 8 and a water inlet tank 9 are arranged on one side of the reactor shell 1, and a stirrer 2 is rotatably connected in each of the raw material tank 8, the water inlet tank 9 and the effluent tank 17. The raw material tank 8 and the water inlet tank 9 are connected with a liquid level controller 3. The raw material tank 8 contains powder sulfur slurry dissolved in water, and the liquid level controller 3 is used for monitoring the liquid level in real time so as to facilitate the subsequent addition of raw materials. The water inlet tank 9 contains nitrate (NO 3-The liquid level of the wastewater is monitored in real time by the liquid level controller 3.

[0032] The water inlet pump 4 is arranged between the water inlet tank 9 and the raw material tank 8, the input end of the water inlet pump 4 is connected with the water inlet tank 9, the output end of the water inlet pump 4 is connected with the heat exchanger 6, one side of the reactor shell 1 is provided with a water inlet pipe 18, the heat exchanger 6 is communicated with the water inlet pipe 18, the nitrate (NO3 - The wastewater is introduced into the heat exchanger 6 under the action of the water inlet pump 4, and the temperature of the wastewater is changed by the heat exchanger 6 to a suitable temperature for the denitrifying bacteria to work, and then the wastewater is introduced into the reaction zone 12.

[0033] The feed pump 10 is arranged between the raw material tank 8 and the reactor shell 1, the input end of the feed pump 10 is communicated with the raw material tank 8, the output end of the feed pump 10 is communicated with the water inlet pipe 18, one end of the water inlet pipe 18 is communicated with the water distributor 20, the powder sulfur slurry in the raw material tank 8 is introduced into the reaction zone 12 under the action of the feed pump 10, the reaction zone 12 is an upflowing reaction device, the suspended filler flows in the reaction zone 12 by hydraulic stirring, and the powder sulfur flows under high-speed hydraulic stirring and is naturally settled at the bottom of the settlement zone 11.

[0034] The output end of the water inlet pump 4 is connected with the temperature controller 7 on one side of the heat exchanger 6 and one side of the reactor shell 1, the temperature controller 7 can monitor the temperature of the wastewater in real time, so as to ensure that the temperature during the reaction is in a suitable range, meanwhile, the output end of the circulating pump 15 and the output end of the water inlet pump 4 are connected with the flow meter 5 on both sides of the heat exchanger 6, and necessary valves are arranged between the pipelines, and the specific arrangement position is the prior art.

[0035] Working principle: when in use, the wastewater is introduced into the sulfur autotrophic reaction zone 12 through the water distributor 20, so that the wastewater is uniformly distributed on the powder sulfur and the suspended filler, the powder sulfur and the suspended filler fully react under high-speed blowing, the nitrate (NO3 3- ) and nitrite (NO 2- ) in the wastewater are fully and completely subjected to sulfur autotrophic denitrification under the action of the denitrifying bacteria and the powder sulfur, so that the nitrate (NO3 3- ) and nitrite (NO 2- ) in the wastewater are rapidly converted into nitrogen gas (N2). The interception wire mesh 13 arranged at the upper part of the reaction zone 12 intercepts the suspended filler into the reaction zone 12. The bottom of the reaction zone 12 is arranged as an inclined angle to prevent the generation of dead zones and reduce the operation efficiency of the reaction. The treated wastewater is filtered by the outlet pump 16 from bottom to top and then introduced into the outlet tank 17. The sulfur autotrophic reactor is arranged as a variable-diameter cylinder which is wide at the upper part and narrow at the lower part, so as to facilitate the settlement of the powder sulfur, part of the outlet water can be extracted by the reflux pump 19 to the reaction zone 12 to improve the strength of the hydraulic stirring, and at the same time, the suspended filler is made to flow by replacing the traditional MBBR process aeration, so as to maintain the anaerobic environment.

[0036] The above has carried out the detailed description to one embodiment of the utility model, but the content described is only the preferred embodiment of the utility model, cannot be considered for limiting the implementation scope of the utility model. All equal changes and improvements etc. that are made in the utility model application scope should still belong to the patent coverage scope of the utility model.

Claims

1. Upflow sulphur autotrophic denitrification moving bed biofilm reactor based on powdered sulphur, comprising a reactor housing (1), characterized in that, The reactor shell (1) is provided with a settling zone (11) below, a reaction zone (12) is fixed in the middle of the reactor shell (1), a blocking wire mesh (13) is fixed on the top of the reaction zone (12), the reaction zone (12) is filled with powdered sulfur and suspended filler, a flow guide cylinder (14) is fixed outside the reaction zone (12) of the reactor shell (1), and the flow guide cylinder (14) is used for guiding the overflow wastewater in the reaction zone (12). The reaction zone (12) is provided with a water distributor (20) below, the output end of the water distributor (20) is arranged towards the lower part of the reaction zone (12), and a reflux pump (19) is arranged on one side of the reactor shell (1), which is used to pump part of the effluent back to the reaction zone (12) to increase the hydraulic stirring intensity.

2. The powder sulfur-based upflow denitrification moving-bed biofilm reactor based on sulfur autotrophy according to claim 1, characterized in that: A circulating pump (15) is arranged on one side of the reactor shell (1), a circulating water inlet pipe (21) is communicated between the output end of the circulating pump (15) and the reactor shell (1), a circulating water outlet pipe (22) is communicated between the input end of the circulating pump (15) and the reactor shell (1), and one end of the circulating water inlet pipe (21) is communicated with the water distributor (20).

3. The powder sulfur-based upflowing sulfur autotrophic denitrification moving bed biofilm reactor according to claim 1, characterized in that: The bottom of the settling zone (11) and the reaction zone (12) is a variable diameter cylinder with a wide top and a narrow bottom, which is used to promote the precipitation of powdered sulfur.

4. The powder sulfur-based upflowing sulfur autotrophic denitrification moving bed biofilm reactor according to claim 1, characterized in that: A water outlet pump (16) is arranged on one side of the reactor shell (1), a water outlet pipe (23) is communicated between the input end of the water outlet pump (16) and the reactor shell (1), and the output end of the water outlet pump (16) is communicated with a water outlet tank (17), and the output end of the water outlet tank (17) is communicated with the input end of the reflux pump (19).

5. The powder sulfur-based upflowing sulfur autotrophic denitrification moving bed biofilm reactor according to claim 4, characterized in that: A raw material tank (8) and a water inlet tank (9) are arranged on one side of the reactor shell (1), and a stirrer (2) is rotatably connected in the raw material tank (8), the water inlet tank (9) and the water outlet tank (17), and the raw material tank (8) and the water inlet tank (9) are connected with a liquid level controller (3).

6. The powder sulfur-based upflowing sulfur autotrophic denitrification moving bed biofilm reactor according to claim 5, characterized in that: A water inlet pump (4) is arranged between the water inlet tank (9) and the raw material tank (8), the input end of the water inlet pump (4) is connected with the water inlet tank (9), the output end of the water inlet pump (4) is connected with a heat exchanger (6), and a water inlet pipe (18) is arranged on one side of the reactor shell (1), and the heat exchanger (6) is communicated with the water inlet pipe (18).

7. The powder sulfur-based upflowing sulfur autotrophic denitrification moving bed biofilm reactor according to claim 6, characterized in that: A feed pump (10) is arranged between the raw material tank (8) and the reactor shell (1), the input end of the feed pump (10) is communicated with the raw material tank (8), the output end of the feed pump (10) is communicated with the water inlet pipe (18), and one end of the water inlet pipe (18) is communicated with the water distributor (20).

8. The powder sulfur-based upflowing sulfur autotrophic denitrification moving bed biofilm reactor according to claim 6, characterized in that: The output end of the water inlet pump (4) is connected with a temperature controller (7) on one side of the heat exchanger (6) and on one side of the reactor shell (1).

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