Internal circulation water anaerobic reactor

Abstract

The utility model provides an internal circulating water anaerobic reactor, which belongs to the technical field of anaerobic reactors and comprises a shell, a reaction mechanism is mounted in the shell and comprises a water inlet pipe, the water inlet pipe is fixedly mounted at the bottom of an inner cavity of the shell, a water distributor is fixedly mounted at the top of the water inlet pipe, and a water outlet pipe is mounted at the bottom of the water distributor. The first reaction plate is fixedly mounted in an inner cavity of the shell, two first lifting pipes are fixedly mounted at the bottom of the first reaction plate, the two first lifting pipes penetrate through the bottom of the first reaction plate, and the second reaction plate is fixedly mounted in the inner cavity of the shell. Due to the arrangement of the reaction mechanism, the whole device is small in size, investment and occupied area are saved, the load is high, capital construction investment is low, the occupied area is small, the internal sludge concentration is high, the microbial biomass is large, the mass transfer effect is good, and the organic load of inlet water can be more than three times that of a common anaerobic reactor.

Description

Technical Field

[0001] This utility model relates to the field of anaerobic reactor technology, specifically to an internal circulating water anaerobic reactor. Background Technology

[0002] Anaerobic bioreactors are a type of reactor used for wastewater treatment. Representative examples include top-flow anaerobic sludge bed reactors and pump-fed granular sludge bed reactors. Wastewater flows from bottom to top through the anaerobic sludge bed. The reactor contains a high density of microorganisms in the lower part, a suspended layer in the middle, and a clarified layer in the upper part. The clarified layer is equipped with a three-phase separator to separate the gas, liquid, and sludge phases. A water distribution system and a sludge layer are located at the bottom. When the anaerobic bioreactor is operating, wastewater enters from the bottom, flows upward through the microbial accumulation at the bottom of the reactor, and organic pollutants in the wastewater are adsorbed by the microorganisms and further degraded into harmless inorganic substances.

[0003] In conventional anaerobic reactors, the mixing of sludge and wastewater mainly relies on natural convection and the flushing effect of the influent. Under high hydraulic loads, sludge is easily carried out of the reactor by the water flow, resulting in a decrease in sludge concentration and affecting the treatment effect. In order to achieve better treatment results, conventional anaerobic reactors usually require a large volume and a high hydraulic retention time, so the footprint is relatively large, which may be a limitation in situations where land resources are scarce. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides an internal circulating water anaerobic reactor that overcomes or at least partially solves the above technical problems.

[0005] This utility model is implemented as follows:

[0006] This utility model provides an internal circulating water anaerobic reactor, including a shell, and a reaction mechanism is installed inside the shell. The reaction mechanism includes:

[0007] A water inlet pipe is fixedly installed at the bottom of the inner cavity of the outer shell, and a water distributor is fixedly installed at the top of the water inlet pipe;

[0008] A first reaction plate is fixedly installed inside the inner cavity of the outer shell. A first lifting tube is fixedly installed at the bottom of the first reaction plate. There are two first lifting tubes, and both first lifting tubes penetrate to the bottom of the first reaction plate.

[0009] The second reaction plate is fixedly installed inside the inner cavity of the outer shell.

[0010] In one embodiment of the present invention, a sedimentation chamber is fixedly installed at the bottom of the second reaction plate, and a sedimentation tank is provided inside the sedimentation chamber. A first conveying pipe is fixedly installed at the bottom of the second reaction plate, and the first conveying pipe extends to the top of the sedimentation chamber. There are two first conveying pipes.

[0011] In one embodiment of this utility model, a second conveying pipe is fixedly installed at the bottom of the second reaction plate, the second conveying pipe extends through to the top of the second reaction plate, and a sludge pump is fixedly installed at the bottom of the second conveying pipe. There are two second conveying pipes.

[0012] In one embodiment of the present invention, a third lifting tube is fixedly installed at the bottom of the second reaction plate, the third lifting tube extends through to the top of the second reaction plate, and the bottom of the third lifting tube extends directly above the first reaction plate.

[0013] In one embodiment of the present invention, a circulation mechanism is installed inside the outer shell, the circulation mechanism including a cyclone gas-liquid separator, the cyclone gas-liquid separator being fixedly installed on the inner wall of the inner cavity of the outer shell.

[0014] In one embodiment of this utility model, a water receiving plate is fixedly installed on the inner wall of the inner cavity of the outer shell, and a fourth lifting pipe is fixedly installed at the bottom of the water receiving plate. The fourth lifting pipe extends into the interior of the cyclone gas-liquid separator, and two fourth lifting pipes are provided.

[0015] In one embodiment of this utility model, a third conveying pipe is fixedly installed at the bottom of the water receiving plate, the third conveying pipe extends through to the top of the water receiving plate, and the bottom of the third conveying pipe extends directly above the first reaction plate.

[0016] In one embodiment of this utility model, a water pump is fixedly installed on the outside of the outer shell, a water suction pipe is fixedly installed on the top of the water pump, the water suction pipe extends into the interior of the sedimentation chamber, a biogas collection tank is fixedly installed on the top of the outer shell, and the biogas collection tank is connected to a cyclone gas-liquid separator.

[0017] The beneficial effects of the internal circulating water anaerobic reactor provided by this utility model include:

[0018] 1. The design of the reaction mechanism makes the entire device smaller in size, saving investment and floor space, with a higher load. The volume is only about 1 / 4 to 1 / 3 of that of a conventional reactor, resulting in low infrastructure investment, small floor space, high sludge concentration, large microbial biomass, and good mass transfer effect. The organic load of the influent can exceed that of a conventional anaerobic reactor by more than 3 times.

[0019] 2. Through the setting of the circulation mechanism, the entire device can achieve automatic internal circulation, using the biogas it generates as the lifting power to realize the internal circulation of the mixed liquid. No external power is required, the processing is highly efficient, and the power consumption is low. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure provided by an embodiment of the present utility model;

[0022] Figure 2 A schematic diagram of the overall internal structure provided for an embodiment of this utility model;

[0023] Figure 3 A schematic diagram of the internal structure of the sedimentation chamber provided for an embodiment of this utility model;

[0024] Figure 4 Provided for the embodiments of this utility model Figure 3 Enlarged structural diagram of section A in the middle.

[0025] In the diagram: 1. Outer shell; 2. Reaction mechanism; 201. Water inlet pipe; 202. Water distributor; 203. First reaction plate; 204. First riser pipe; 205. Second reaction plate; 207. Sedimentation chamber; 208. Sedimentation tank; 209. First conveying pipe; 210. Second conveying pipe; 211. Sludge pump; 212. Third riser pipe; 3. Circulation mechanism; 301. Cyclone gas-liquid separator; 302. Water receiving plate; 303. Fourth riser pipe; 304. Third conveying pipe; 305. Water pump; 306. Suction pipe; 307. Biogas collection tank. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Example

[0027] Reference Figures 1-4This technical solution provides an internal circulating water anaerobic reactor, which includes an outer shell 1. A reaction mechanism 2 is installed inside the outer shell 1. The reaction mechanism 2 includes an inlet pipe 201, which is fixedly installed at the bottom of the inner cavity of the outer shell 1. A water distributor 202 is fixedly installed at the top of the inlet pipe 201. Workers transport wastewater into the device through the inlet pipe 201 and distribute the wastewater evenly at the bottom of the outer shell 1 through the water distributor 202. The bottom of the outer shell 1 is covered with granular sludge, which is composed of various anaerobic microorganisms. When wastewater mixes with the granular sludge, a high-concentration sludge mixture is formed. A first reaction plate 203 is fixedly installed inside the inner cavity of the outer shell 1. Two first riser pipes 204 are fixedly installed at the bottom of the first reaction plate 203. Both first riser pipes 204 extend to the bottom of the first reaction plate 203. When wastewater and granular sludge mix to form a sludge mixture, a large amount of biogas is generated. The biogas production increases the pressure at the bottom of the outer shell 1. Under the action of pressure and biogas upward force, the sludge mixture at the bottom of the inner cavity of the outer shell 1 rises to the first reaction plate 203 through the first riser pipes 204, forming the first anaerobic zone. In this zone, most of the organic matter in the wastewater is converted into biogas. The upward flow of the mixed liquid and the biogas disturbance cause the sludge to expand and fluidize. The second reaction plate 205 is fixedly installed inside the inner cavity of the outer shell 1. A sedimentation chamber 207 is fixedly installed at the bottom of the second reaction plate 205. A sedimentation tank 208 is formed inside the sedimentation chamber 207. Two first conveying pipes 209 are fixedly installed at the bottom of the second reaction plate 205, extending directly above the sedimentation chamber 207. A second conveying pipe 210 is fixedly installed at the bottom of the second reaction plate 205, extending to the top of the second reaction plate 205. Two sludge pumps 211 are fixedly installed at the bottom of the second conveying pipes 210. A third lifting pipe 212 is fixedly installed at the bottom of the second reaction plate 205, extending to the top of the second reaction plate 205. The bottom of the three lift pipes 212 extends directly above the first reaction plate 203. Similarly, driven by the biogas generated in the anaerobic zone at the top of the first reaction plate 203, the wastewater is lifted to the top of the second reaction plate 205, forming a second anaerobic zone. The sludge concentration on the second reaction plate 205 is reduced, and the amount of biogas produced is reduced, so the disturbance to the sludge mixture is smaller, and the sludge will settle here. The sludge mixture settled at the bottom of the second reaction plate 205 will be transported to the interior of the sedimentation tank 208 through the first conveying pipe 209. After standing for a period of time, the sludge will settle inside the sedimentation chamber 207, and then the sludge will be sucked back to the top of the second reaction plate 205 by the sludge pump 211 to realize the recycling of sludge.

[0028] Reference Figures 1-4Based on the same concept as Embodiment 1 above, this embodiment also proposes that a circulation mechanism 3 is installed inside the outer shell 1. The circulation mechanism 3 includes a cyclone gas-liquid separator 301, which is fixedly installed on the inner wall of the inner cavity of the outer shell 1. A water receiving plate 302 is fixedly installed on the inner wall of the inner cavity of the outer shell 1. A fourth lifting pipe 303 is fixedly installed at the bottom of the water receiving plate 302. The fourth lifting pipe 303 extends into the interior of the cyclone gas-liquid separator 301. There are two fourth lifting pipes 303. The fourth lifting pipe 303 lifts the biogas mixture generated by anaerobic digestion into the cyclone gas-liquid separator 301. Under the action of the cyclone gas-liquid separator 301, the biogas and the mixed liquid are separated. A third conveying pipe 304 is fixedly installed at the bottom of the water receiving plate 302. The conveying pipe 304 extends to the top of the water receiving plate 302, and the bottom of the third conveying pipe 304 extends directly above the first reaction plate 203. The mixed liquid produced by gas-liquid separation flows back to the top of the first reaction plate 203 through the third conveying pipe 304 for recycling. A water pump 305 is fixedly installed on the outside of the outer shell 1, and a suction pipe 306 is fixedly installed on the top of the water pump 305. The suction pipe 306 extends into the interior of the sedimentation chamber 207. The water pump 305 extracts the supernatant produced at the top of the sedimentation chamber 207. A biogas collection tank 307 is fixedly installed on the top of the outer shell 1. The biogas collection tank 307 is connected to the cyclone gas-liquid separator 301. The clean biogas produced by the cyclone gas-liquid separator 301 enters the biogas collection tank 307 for collection.

[0029] Specifically, the working process or principle of this internal circulating water anaerobic reactor is as follows: First, the operator transports wastewater into the interior of the device through the inlet pipe 201, and distributes the wastewater evenly at the bottom of the outer shell 1 through the water distributor 202. When the wastewater mixes with granular sludge to form a sludge mixture, a large amount of biogas is generated. The biogas production increases the pressure at the bottom of the outer shell 1. Under the action of pressure and biogas upward force, the sludge mixture at the bottom of the inner cavity of the outer shell 1 rises to the first reaction plate 203 through the first riser pipe 204, forming the first anaerobic zone. Similarly, driven by the biogas generated in the anaerobic zone at the top of the first reaction plate 203, the wastewater is lifted to the top of the second reaction plate 205, forming the second anaerobic zone, and settles on the second reaction plate. The sludge mixture at the bottom of plate 205 is transported to the interior of sedimentation tank 208 through first conveying pipe 209. After standing for a period of time, the sludge settles inside sedimentation chamber 207. Then, the sludge is pumped back to the top of second reaction plate 205 by sludge pump 211. Fourth lift pipe 303 lifts the biogas mixture generated by anaerobic digestion to cyclone gas-liquid separator 301. Under the action of cyclone gas-liquid separator 301, biogas and mixed liquid are separated. The mixed liquid generated by gas-liquid separation flows back to the top of first reaction plate 203 through third conveying pipe 304. Water pump 305 extracts the supernatant generated at the top of sedimentation chamber 207. The clean biogas separated by cyclone gas-liquid separator 301 enters biogas collection tank 307 for collection.

Claims

1. An internal circulating water anaerobic reactor, comprising a shell (1), characterized in that, A reaction mechanism (2) is installed inside the outer shell (1), and the reaction mechanism (2) includes: Water inlet pipe (201), the water inlet pipe (201) is fixedly installed at the bottom of the inner cavity of the outer shell (1), and a water distributor (202) is fixedly installed on the top of the water inlet pipe (201). The first reaction plate (203) is fixedly installed inside the inner cavity of the outer shell (1). The bottom of the first reaction plate (203) is fixedly installed with a first lifting tube (204). There are two first lifting tubes (204), and both first lifting tubes (204) penetrate to the bottom of the first reaction plate (203). The second reaction plate (205) is fixedly installed inside the cavity of the outer shell (1).

2. The internal circulating water anaerobic reactor according to claim 1, characterized in that, A sedimentation chamber (207) is fixedly installed at the bottom of the second reaction plate (205). A sedimentation tank (208) is opened inside the sedimentation chamber (207). A first conveying pipe (209) is fixedly installed at the bottom of the second reaction plate (205). The first conveying pipe (209) extends to the top of the sedimentation chamber (207). There are two first conveying pipes (209).

3. The internal circulating water anaerobic reactor according to claim 2, characterized in that, A second conveying pipe (210) is fixedly installed at the bottom of the second reaction plate (205). The second conveying pipe (210) extends through to the top of the second reaction plate (205). A sludge pump (211) is fixedly installed at the bottom of the second conveying pipe (210). There are two second conveying pipes (210).

4. The internal circulating water anaerobic reactor according to claim 3, characterized in that, A third lifting tube (212) is fixedly installed at the bottom of the second reaction plate (205). The third lifting tube (212) extends through to the top of the second reaction plate (205), and the bottom of the third lifting tube (212) extends directly above the first reaction plate (203).

5. The internal circulating water anaerobic reactor according to claim 4, characterized in that, The outer shell (1) is equipped with a circulation mechanism (3), which includes a cyclone gas-liquid separator (301) and is fixedly installed on the inner wall of the inner cavity of the outer shell (1).

6. The anaerobic reactor with internal circulation water according to claim 5, characterized in that, A water receiving plate (302) is fixedly installed on the inner wall of the inner cavity of the outer shell (1). A fourth lifting pipe (303) is fixedly installed at the bottom of the water receiving plate (302). The fourth lifting pipe (303) extends into the interior of the cyclone gas-liquid separator (301). There are two fourth lifting pipes (303).

7. The internal circulating water anaerobic reactor according to claim 6, characterized in that, A third conveying pipe (304) is fixedly installed at the bottom of the water receiving plate (302). The third conveying pipe (304) extends through to the top of the water receiving plate (302), and the bottom of the third conveying pipe (304) extends directly above the first reaction plate (203).

8. The internal circulating water anaerobic reactor according to claim 7, characterized in that, A water pump (305) is fixedly installed on the outside of the outer shell (1). A suction pipe (306) is fixedly installed on the top of the water pump (305). The suction pipe (306) extends into the interior of the sedimentation chamber (207). A biogas collection tank (307) is fixedly installed on the top of the outer shell (1). The biogas collection tank (307) is connected to the cyclone gas-liquid separator (301).

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