CN203582580U - Multi-stage treatment anaerobic reactor capable of separating inorganic sludge - Google Patents

Abstract

This invention discloses a multi-stage anaerobic reactor capable of separating inorganic sludge. It includes at least one three-phase separator within the reactor shell, with an overflow weir at the top. A gas-liquid separator is located at the top of the reactor shell, with a biogas discharge pipe and a downcomer extending into the lower part of the shell. The three-phase separator also has an ascending pipe connected to the gas-liquid separator. An inverted cone sludge discharge hopper and a water distributor are located at the bottom of the reactor shell. The water distributor's branch pipes are horizontally connected tangentially to the inverted cone sludge discharge hopper, and the bottom of the hopper is connected to a sludge discharge pipe. This invention combines internal and external circulation, fluidizing the granular sludge in the reactor by increasing the upward flow velocity, thus improving mass transfer. The volumetric loading rate for treating medium-to-high concentration organic wastewater can reach over 30 kg COD/( ^m³ ·d). This invention achieves the separation of inorganic sludge, allowing for periodic discharge of inorganic sludge from the reactor and maintaining its efficient operation.

Description

Multistage Anaerobic Reactor for Separation of Inorganic Sludge

technical field

The utility model relates to waste water treatment equipment, in particular to a multi-stage treatment anaerobic reactor capable of separating inorganic sludge.

Background technique

With the rapid development of industrial production, people pay more and more attention to environmental problems, among which wastewater treatment is the focus of attention. Anaerobic biological treatment of wastewater is a harmless wastewater treatment technology, which uses anaerobic microorganisms to degrade pollutants in wastewater, and at the same time can produce high-quality biomass energy—biogas.

Anaerobic reactors are key equipment for anaerobic treatment of wastewater. With the deepening of research, anaerobic reactors are developing in the direction of low energy and high efficiency. At present, the reactor in the form of an internal circulating fluidized bed is a research hotspot. It has the advantages of good mass transfer effect, high organic load, short residence time, small footprint, low operating cost, convenient maintenance, and no sludge loss. The development direction of anaerobic reactor.

During the operation of the current anaerobic reactor, there are often cases of sediment enrichment and calcified sludge accumulation due to poor pretreatment of incoming water. If there is no design for the separation and discharge of inorganic sludge, a large number of microorganisms will be lost when the inorganic sludge is discharged, which will affect the treatment effect of the anaerobic reactor.

Utility model content

The technical problem to be solved by the utility model is to provide a multi-stage treatment anaerobic reactor capable of separating inorganic sludge, so that it can regularly discharge the inorganic sludge in the reactor while maintaining the advantages of the internal circulation anaerobic reactor, Keep your reactor running efficiently.

The utility model solves the above technical problems with the following technical solutions:

The utility model is a multi-stage anaerobic reactor capable of separating inorganic sludge, comprising a reactor shell 3, at least one level of three-phase separator is arranged in the reactor shell 3, and an overflow is arranged on the top of the three-phase separator. Weir 13, the top of the reactor shell 3 is provided with a gas-liquid separator 12, the gas-liquid separator 12 is provided with a biogas pipe 11 for outward discharge and a downcomer 5 extending into the lower part of the shell, and the three-phase separator is provided with a connection Into the rising pipe of the gas-liquid separator 12, the lower part of the reactor shell 3 is provided with an inverted cone mud discharge bucket 16 and a water distributor 17, and the water distribution branch pipe of the water distributor 17 is horizontally connected to the inverted cone mud discharge bucket 16 in a tangential direction , the bottom of the inverted cone mud discharge hopper 16 is connected to the mud discharge pipe 1.

The utility model is a multi-stage treatment anaerobic reactor capable of separating inorganic sludge. The upper part of the reactor shell 3 is provided with a return pipe 9 and an outlet pipe 14 connected to the outlet of the overflow weir 13, and the outlet pipe 14 is connected to the next one. The device of the process, the return pipe 9 communicates with the water inlet end of the water distributor 17.

The utility model relates to a multi-stage anaerobic reactor capable of separating inorganic sludge. The lower part of the reactor shell 3 is provided with a sludge inlet pipe 2 .

The utility model is a multi-stage treatment anaerobic reactor capable of separating inorganic sludge. The three-phase separator is provided with two stages, the first-stage three-phase separator 6 is arranged in the middle of the reactor shell, and the second-stage three-phase separator 8 Set on the upper part of the reactor shell.

The utility model reactor has the following advantages:

①Combine internal circulation and external circulation to improve mass transfer effect.

②High organic load, when treating medium and high concentration organic wastewater, the volume load can reach more than 30kgCOD/(m ³ ·d).

③Large height-to-diameter ratio, small footprint, and small infrastructure investment.

④Multi-level treatment makes wastewater treatment more thorough.

⑤Strong impact resistance and stable treatment effect.

⑥ It can effectively discharge inorganic sludge.

Description of drawings

Fig. 1 is a structural schematic diagram of a multi-stage anaerobic reactor for separating inorganic sludge of the present invention.

FIG. 2 is a schematic structural view of the first-stage three-phase separator 6 in FIG. 1 .

Fig. 3 is a top view of the inverted cone mud discharge bucket 16 and the water distributor 17 in Fig. 1 .

In the figure: 1 mud discharge pipe, 2 mud inlet pipe, 3 reactor shell, 4 high-load reaction zone, 5 downcomer, 6 primary three-phase separator, 7 low-load reaction zone, 8 secondary three-phase separator , 9 return pipe, 10 secondary ascending pipe, 11 biogas pipe, 12 gas-liquid separator, 13 outlet weir, 14 outlet pipe, 15 primary ascending pipe, 16 inverted cone sludge hopper, 17 water distributor, 18 gas collector chamber, 19 sloped baffles.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

The multi-stage anaerobic reactor for separating inorganic sludge of the utility model includes a reactor shell 3, an inverted cone sludge discharge bucket 16, a water distributor 17, a first-stage three-phase separator 6, and a second-stage three-phase separator 8. Overflow weir 13, gas-liquid separator 12, primary ascending pipe 15, secondary ascending pipe 10, and descending pipe 5.

As shown in Figure 1, a first-level three-phase separator 6 is arranged in the middle of the reactor housing 3, a second-level three-phase separator 8 is arranged on the inner upper part of the reactor housing 3, and a second-level three-phase separator 8 is arranged on the top of the second-level three-phase separator 8. An overflow weir 13, a gas-liquid separator 12 is provided on the top of the reactor shell 3, and the gas-liquid separator 12 is provided with a biogas pipe 11 for outward discharge and passes through the secondary three-phase separator 8 and the primary three-phase separator in sequence. After the separator 6 extends into the downcomer 5 at the lower part of the shell, the first-stage three-phase separator 6 and the second-stage three-phase separator 8 are respectively provided with a first-stage riser 15 and a second-stage riser connected to the gas-liquid separator 12 10. The upper part of the reactor shell 3 is provided with a return pipe 9 and an outlet pipe 14 communicating with the outlet of the overflow weir 13. The outlet pipe 14 is connected to the device of the next process, and the return pipe 9 is connected with the water inlet end of the water distributor 17. , The lower part of the reactor shell 3 is provided with a sludge inlet pipe 2 for inputting anaerobic granular sludge. The lower part of the reactor shell 3 is provided with an inverted cone sludge discharge hopper 16 and a water distributor 17, and the water distribution branch pipe of the water distributor 17 is horizontally connected to the inverted cone sludge discharge hopper 16 in a tangential direction, as shown in FIG. 3 . The bottom of the inverted cone mud discharge hopper 16 is connected with the mud discharge pipe 1 . The area between the primary three-phase separator 6 and the inverted cone mud discharge hopper 16 is the high-load reaction zone 4, and the area between the secondary three-phase separator 8 and the primary three-phase separator 6 is the low-load reaction zone 7 .

The structure of the first-level three-phase separator 6 and the second-level three-phase separator 8 adopted by the utility model is the same. The structure of the first-level three-phase separator 6 is shown in Figure 2. Chamber 18 is formed, and the top of inclined baffle plate 19 is provided with the small hole that communicates with gas collection chamber 18, and the top of gas collection chamber 18 communicates with primary riser pipe 15.

The working principle of the utility model is as follows:

The waste water is mixed with the outlet water of the return pipe 9 and then pumped to the water distributor 17. After uniform water distribution, it spirals up into the high-load reaction zone 4, where it is fully mixed with the anaerobic granular sludge and the circulating water in the downcomer 5, and is Under the action of anaerobic microorganisms, the pollutants in the wastewater are removed and biogas is produced. Wastewater, anaerobic granular sludge, and biogas rise to the first-stage three-phase separator 6 and then separated: the granular sludge is stopped by the inclined baffle 19, and falls under the action of gravity; the biogas is intercepted by the inclined baffle 19, and passes through the The small holes connected to the chamber 18 enter the gas collection chamber 18, and then enter the gas-liquid separator 12 through the first-stage riser pipe 15; the waste water deflects along the gap between the inclined baffles and enters the low-load reaction zone 7 upwards. The wastewater is further degraded in the low-load reaction zone 7 and produces a small amount of biogas. The biogas is collected by the secondary three-phase separator 8 and enters the gas-liquid separator 12 through the secondary riser 10. After purification, the wastewater enters the return pipe through the overflow weir 13 9. The water outlet pipe 14, the outlet water of the outlet pipe 14 enters the post-process treatment after the anaerobic treatment, and the outlet water of the return pipe 9 returns to the front and mixes with the inlet water to complete the outer circulation. During the process of the biogas entering the gas-liquid separator 12 through the first-level ascending pipe 15 and the second-stage ascending pipe 10, part of the waste water also enters the gas-liquid separator 12 due to the gas lift. 5 and then enter the bottom of the reactor shell to complete the internal circulation, so this type of reactor shell is called an internal circulation reactor. Wastewater is treated in two stages of high-load reaction zone and low-load reaction zone, so it is also called multi-stage reactor.

The utility model is provided with an inverted cone mud discharge bucket 16 at the bottom of the reactor shell, and the lower end is connected with a mud discharge pipe 1 . During the operation of the reactor, the sludge rises spirally with the water flow, hits the shell by centrifugal force, and then falls to the inverted cone sludge discharge hopper 16 along the shell. Due to the high proportion of inorganic sludge, it will fall to the bottom and be discharged from the reactor through the sludge discharge pipe 1 regularly. Shell, which keeps the reactor running efficiently.

The utility model is provided with a water distributor 17 at the bottom, and the branch pipe of the water distributor horizontally enters the inverted cone mud discharge bucket 16 along the tangential direction, and the water inlet evenly spirals up during the operation of the reactor to ensure that there is no dead angle of water inlet.

The utility model is provided with an overflow weir 13 on the upper part of the reactor shell, and the outlet water of the overflow weir flows out of the reactor shell through the return pipe 9 and the water outlet pipe 14 . The outlet water of the return pipe 9 is mixed with the inlet water, and then pumped into the reactor shell from the bottom inlet pipe 1 through the pump to form an external circulation, increase the rising flow rate, make the biological sludge in a fluidized state, and improve the mass transfer effect.

Claims (4)

1. A multi-stage treatment anaerobic reactor capable of separating inorganic sludge, comprising a reactor shell (3), at least one level of three-phase separator is provided in the reactor shell (3), and the top of the three-phase separator is provided with There is an overflow weir (13), a gas-liquid separator (12) is provided on the top of the reactor (3) shell, and the gas-liquid separator (12) is provided with a biogas pipe (11) that is discharged outward and extends into the lower part of the shell The downcomer (5) of the three-phase separator is provided with a riser pipe connected to the gas-liquid separator (12). device (17), the water distribution branch pipe of the water distributor (17) is horizontally connected to the inverted cone mud discharge bucket (16) in the tangential direction, and the bottom of the inverted cone mud discharge bucket (16) is connected to the mud discharge pipe (1). 2. The anaerobic reactor for multi-stage treatment of separable inorganic sludge according to claim 1, characterized in that, the upper part of the reactor shell (3) is provided with an outlet communicating with the overflow weir (13) Backflow pipe (9) and water outlet pipe (14), water outlet pipe (14) connects the device of next procedure, and backflow pipe (9) is communicated with the water inlet end of water distributor (17). 3. The anaerobic reactor for multi-stage treatment of separable inorganic sludge according to claim 1 or 2, characterized in that, the lower part of the reactor shell (3) is provided with a sludge inlet pipe (2). 4. The anaerobic reactor for multi-stage treatment of separable inorganic sludge according to claim 1 or 2, characterized in that the three-phase separator is provided with two stages, and the first-stage three-phase separator (6) is provided with In the middle part of the reactor shell, a secondary three-phase separator (8) is arranged on the upper part of the reactor shell.

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