Sloped tube upflow anaerobic reactor

Abstract

The utility model provides a kind of inclined pipe up-flow anaerobic reactor, belong to sewage treatment equipment technical field, including reactor tank body, the reactor tank body inside from below to above sequentially includes reaction zone, three-phase separator, inclined pipe sedimentation zone, overflow weir, the bottom layer of reaction zone is equipped with water distributor, the upper layer of reaction zone is equipped with water collector, the water collector is connected circulating pump by circulation pipe, the circulating pump is connected with water inlet pipe and is connected with water distributor, the overflow weir is connected with the water outlet on the reactor tank body. The utility model can realize uniform water distribution, strengthen the mass transfer effect between activated sludge and sewage, improve the sludge interception capacity of reactor, thereby improve the volumetric loading of reactor.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater treatment equipment, specifically to an inclined tube upflow anaerobic reactor. Background Technology

[0002] Upflow anaerobic sludge bed (UASB) reactors are currently the most widely used anaerobic reactors. By adding a three-phase separator inside the reactor, they can successfully separate the sludge retention time (SRT) and hydraulic retention time (HRT), which can maintain a large amount of activated sludge in the reactor, greatly shorten the HRT, and increase the volumetric loading of the reactor.

[0003] The volumetric loading rate of an anaerobic reactor primarily depends on the sufficient contact between sludge and wastewater. In a UASB reactor, sludge-water mixing relies mainly on a well-designed distributor to provide agitation and mass transfer, as well as the internal circulation caused by biogas produced under anaerobic conditions. However, in conventional designs, to retain flocculent sludge within the reactor, the designed upward flow velocity must be lower than the surface velocity in the corresponding settling zone. A lower upward flow velocity cannot provide adequate agitation and mass transfer, thus affecting the healthy growth of granular sludge and leading to reduced sludge activity within the reactor.

[0004] The inclined plate anaerobic sludge blanket (UASB / ITS) reactor replaces the three-phase separator in the UASB reactor with an inclined plate. Based on the principle of shallow sedimentation, it improves the separation effect of solids and liquids and enhances the sludge retention capacity of the anaerobic reactor. The UASB / ITS reactor exhibits characteristics such as fast start-up time, stable operation, and low suspended solids in the effluent. However, when treating high-concentration organic wastewater with a high surface gas load, the sludge will be violently agitated by biogas, resulting in a complete mixing of solids and liquids and deteriorating the effluent quality. Utility Model Content

[0005] The purpose of this invention is to provide an inclined tube upflow anaerobic reactor to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An inclined tube upflow anaerobic reactor includes a reactor tank. The reactor tank contains, from bottom to top, a reaction zone, a three-phase separator, an inclined tube sedimentation zone, and an overflow weir. A water distributor is provided at the bottom of the reaction zone, and a water collector is provided at the top of the reaction zone. The water collector is connected to a circulation pump through a circulation pipe. The circulation pump is connected to the water distributor after being connected to the inlet pipe. The overflow weir is connected to the outlet on the reactor tank.

[0008] Preferably, the center of the water distributor is a water distribution bag, which has a cone-shaped structure. Water distribution branch pipes I and II are connected around the water distribution bag. Water distribution branch pipes I and II are distributed on the same plane and are evenly distributed and intersecting.

[0009] Preferably, the length of the water distribution branch pipe I is 1 / 3 to 1 / 2 of the cross-sectional radius of the reactor tank, and the length of the water distribution branch pipe II is twice the length of the water distribution branch pipe I.

[0010] Preferably, the outlet ends (i.e. the ends away from the water distribution bag) of both water distribution branch pipe I and water distribution branch pipe II are provided with water distribution heads, and the water outlet direction of the water distribution head is perpendicular to the direction of the water distribution branch pipe in which it is located.

[0011] Preferably, the water collector includes multiple water collection branch pipes, which are evenly distributed on the same plane. Each water collection branch pipe has 3 to 6 water collection holes of different diameters, and the holes are spaced at the same distance.

[0012] Preferably, the three-phase separator includes a guide fluid and a settling slope. The settling slope and the side of the reactor tank form a gas collection chamber with an angle of 30° to 60°. A biogas collection pipe is provided above the gas collection chamber and is connected to a water seal tank. A biogas outlet is provided above the water seal tank.

[0013] Preferably, the bottom of the inclined tube sedimentation zone is a perforated plate support, and the inclined tube is filled in the perforated plate support to form the inclined tube sedimentation zone.

[0014] Preferably, the angle between the inclined tube and the horizontal plane is 45°~60°, the cross-sectional shape of the inclined tube is a regular hexagon or a circle, and the diameter of the inclined tube is 80~120mm.

[0015] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0016] This scheme enhances the solid-liquid separation effect of the reactor effluent by setting up the inclined tube sedimentation zone of the inclined tube upflow anaerobic reactor, and improves the sludge retention capacity of the reactor. By setting up a water collector and water distribution bag, internal circulation is realized in the reaction zone of the reactor, which enhances the mass transfer effect between sludge and water and increases the volumetric loading of the reactor. Attached Figure Description

[0017] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0018] Figure 1 This is a schematic diagram of an inclined tube upflow anaerobic reactor.

[0019] Figure 2 This is a schematic diagram of the water distributor.

[0020] Figure 3 This is a schematic diagram of the water collector.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1-Reactor tank, 2-Water distributor, 3-Inlet pipe, 4-Circulation pump, 5-Circulation pipe, 6-Reaction zone, 7-Water collector, 8-Three-phase separator, 9-Inclined tube sedimentation zone, 10-Overflow weir, 11-Outlet, 12-Biogas collection pipe, 13-Biogas outlet, 14-Water seal tank, 201-Water distribution bag, 202-Water distribution branch pipe II, 203-Water distribution branch pipe I, 204-Water distribution head, 701-Water collection branch pipe, 702-Water collection hole, 801-Guide fluid, 802-Gas collection chamber, 803-Settling slope. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0025] Example 1

[0026] An inclined tube upflow anaerobic reactor, such as Figure 1-3 As shown, the reactor includes a reactor tank 1, and from bottom to top, a reaction zone 6, a three-phase separator 8, an inclined tube sedimentation zone 9, and an overflow weir 10 are arranged. The overflow weir 10 is connected to the outlet 11 on the reactor tank 1.

[0027] like Figure 1-2As shown, a water distributor 2 is provided at the bottom of the reaction zone 6. The center of the water distributor 2 is a cone-shaped water distribution bag 201, which is surrounded by several water distribution branch pipes I 203 and II 202. The water distribution branch pipes I 203 and II 202 are located on the same horizontal plane and are evenly distributed in a crisscross pattern. In this embodiment, there are 4 water distribution branch pipes I 203 and 4 water distribution branch pipes II 202. The length of the water distribution branch pipe I 203 is 1 / 3 to 1 / 2 of the cross-sectional radius of the reactor tank 1, and the length of the water distribution branch pipe II 202 is twice the length of the water distribution branch pipe I 203. The structure of the water distribution branch pipes of different lengths and symmetrical distribution can effectively expand the water distribution coverage area and avoid the water flow short-circuit or dead zone problems caused by traditional single-point or ring water distribution. In addition, water distribution branch pipe I 203 and water distribution branch pipe II 202 are each provided with a water distribution head 204 at the end away from the water distribution package 201, and the water outlet direction of all water distribution heads 204 is perpendicular to the axis of the branch pipe where they are located.

[0028] like Figure 1 and Figure 3 As shown, a water collector 7 is provided at the upper part of the reaction zone 6. The water collector 7 is connected to the circulation pump 4 through the circulation pipe 5. The circulation pump 4 is then connected to the water inlet pipe 3, and finally back to the water distributor 2, forming an internal circulation loop. The water collector 7 is composed of several identical water collecting branch pipes 701 evenly distributed on the same plane. In this embodiment, eight water collecting branch pipes 701 are used, and each water collecting branch pipe 701 is provided with 3 to 6 water collecting holes 702 of different diameters but with equal hole spacing.

[0029] like Figure 1 As shown, the three-phase separator 8 includes a guide fluid 801 and a settling slope 803. A gas collection chamber 802 with an angle of 30° to 60° is formed between the settling slope 803 and the side wall of the tank. A biogas collection pipe 12 is located at the top of the gas collection chamber 802, connecting to a water seal tank 14. The gas is then discharged through a biogas outlet 13 above the water seal tank 14. The gas collection chamber collects the gas generated during wastewater treatment and discharges it into the water seal tank 14 through the biogas collection pipe. This structure safely discharges the gas while maintaining stable internal pressure through a water seal, preventing backflow of air and disruption of the anaerobic environment. The settling slope 803 is made of a smooth material (such as stainless steel or polymer material), which significantly reduces sludge adhesion resistance, promotes rapid sludge sliding back into the reaction zone 6, and reduces loss.

[0030] The bottom of the inclined tube sedimentation zone 9 is supported by an orifice plate support 902, and the orifice plate support 902 is filled with inclined tubes 901 to form the inclined tube sedimentation zone 9. The inclined tubes 901 have an angle of 45° to 60° with the horizontal plane. Through the principle of shallow sedimentation, the effective settling area is greatly increased within a limited height. Its cross-section is regular hexagonal or circular, and the tube diameter is 80 to 120 mm, which takes into account both water flow and settling efficiency.

[0031] The operating procedure of this scheme is as follows: Wastewater to be treated enters the distributor 2 from the bottom, causing the wastewater in the reactor tank 1 to flow upwards. It sequentially passes through the reaction zone 6, the three-phase separator 8, and the inclined tube sedimentation zone 9. The final treated supernatant is evenly collected through the overflow weir 10 and discharged through the outlet 11, achieving highly efficient effluent treatment. During this process, the water collector 7 located above the reaction zone 6 uses a circulating pump to pump the liquid back to the distributor 2 to turbulent the flow, ensuring uniform mixing of the mud and water mixture in the reaction zone 6 and enhancing the treatment effect. The gas collected by the three-phase separator 8 enters the water seal tank 14 through the biogas collection pipe 12, facilitating subsequent resource utilization.

[0032] The above-described preferred embodiments of the present invention are provided for guidance, but it will be apparent to those skilled in the art that such embodiments are provided merely by way of example. Many modifications, alterations, and alternatives will arise in the mind and spirit of the present invention without departing from its intent. It should be understood that various alternatives to the embodiments of the present invention described herein may be employed in the practice of the present invention. The appended claims are intended to define the scope of protection of the present invention and therefore cover the modular compositions, equivalents, or alternatives within the scope of these claims.

Claims

1. An inclined tube upflow anaerobic reactor, comprising a reactor tank (1), characterized in that, The reactor tank (1) includes, from bottom to top, a reaction zone (6), a three-phase separator (8), an inclined tube sedimentation zone (9), and an overflow weir (10). The bottom layer of the reaction zone (6) is equipped with a water distributor (2), and the upper layer of the reaction zone (6) is equipped with a water collector (7). The water collector (7) is connected to a circulation pump (4) through a circulation pipe (5). The circulation pump (4) is connected to the water distributor (2) after being connected to the water inlet pipe (3). The overflow weir (10) is connected to the water outlet (11) on the reactor tank (1).

2. The inclined tube upflow anaerobic reactor according to claim 1, characterized in that, The center of the water distributor (2) is a water distribution bag (201), which is a cone-shaped structure. Water distribution branch pipe I (203) and water distribution branch pipe II (202) are connected around the water distribution bag (201). The water distribution branch pipe I (203) and water distribution branch pipe II (202) are distributed on the same plane and are evenly distributed and intersecting.

3. The inclined tube upflow anaerobic reactor according to claim 2, characterized in that, The length of the water distribution branch pipe I (203) is 1 / 3 to 1 / 2 of the cross-sectional radius of the reactor tank (1), and the length of the water distribution branch pipe II (202) is twice the length of the water distribution branch pipe I (203).

4. The inclined tube upflow anaerobic reactor according to claim 2, characterized in that, Both the water distribution branch pipe I (203) and the water distribution branch pipe II (202) are provided with a water distribution head (204) at the end away from the water distribution bag (201), and the water outlet direction of the water distribution head (204) is perpendicular to the direction of the water distribution branch pipe.

5. The inclined tube upflow anaerobic reactor according to claim 1, characterized in that, The water collector (7) includes multiple water collection branch pipes (701), which are evenly distributed on the same plane. Each water collection branch pipe (701) has 3 to 6 water collection holes (702) with different diameters, and the holes (702) are spaced at the same distance.

6. The inclined tube upflow anaerobic reactor according to claim 1, characterized in that, The three-phase separator (8) includes a guide fluid (801) and a settling slope (803). The settling slope (803) and the side of the reactor tank (1) form a gas collection chamber (802) with an angle of 30°~60°. A biogas collection pipe (12) is provided above the gas collection chamber (802). The biogas collection pipe (12) is connected to a water seal tank (14). A biogas outlet (13) is provided above the water seal tank (14).

7. The inclined tube upflow anaerobic reactor according to claim 1, characterized in that, The bottom of the inclined tube sedimentation zone (9) is a perforated plate support, and the inclined tube (901) is filled in the perforated plate support (902) to form the inclined tube sedimentation zone (9).

8. The inclined tube upflow anaerobic reactor according to claim 7, characterized in that, The angle between the inclined tube (901) and the horizontal plane is 45°~60°, the cross-sectional shape of the inclined tube (901) is a regular hexagon or a circle, and the diameter of the inclined tube (901) is 80~120mm.

Images