UASB anaerobic reactor

Abstract

The present invention discloses a UASB anaerobic reactor, comprising a reactor and a central tube located in the reactor, wherein the central tube is provided with a liquid inlet channel and a liquid outlet channel, and is characterized in that: a circulation pipe is further provided, wherein the inlet of the circulation pipe is located in the central tube, and the outlet is located in the reactor outside the central tube. In the present application, a circulation pipe is provided, and when wastewater is injected into the reactor from the liquid outlet channel and the circulation pipe, mixing of wastewater and sludge at the bottom of the reactor can be caused, and compared with only providing the liquid outlet channel, wastewater and sludge can be more fully contacted.

Description

Technical Field

[0001] The invention relates to the technical field of anaerobic reactors, in particular to a UASB anaerobic reactor. Background Art

[0002] The wastewater of the UASB reactor is introduced into the bottom of the reactor as evenly as possible. The wastewater passes upward through the sludge bed containing granular sludge or flocculent sludge. The anaerobic reaction occurs in the process of contact between the wastewater and the sludge particles. The biogas produced under the anaerobic state causes internal circulation, which is beneficial to the formation and maintenance of granular sludge. Some gases formed in the sludge layer are attached to the sludge particles. The attached and unattached gases rise to the top of the reactor. The sludge rising to the surface hits the bottom of the gas emitter of the three-phase reactor, causing the sludge flocs with attached bubbles to degas. After the bubbles are released, the sludge particles will settle to the surface of the sludge bed. The attached and unattached gases are collected in the gas collecting chamber of the three-phase separator at the top of the reactor. Therefore, for the wastewater treatment process, sufficient contact between wastewater and sludge is particularly important for the efficiency of wastewater treatment. Summary of the invention

[0003] The object of the present invention is to provide a UASB anaerobic reactor to solve the problem that wastewater and sludge in the existing UASB anaerobic reactor are difficult to be evenly distributed or need to be evenly distributed with the aid of a stirring device.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A UASB anaerobic reactor comprises a reactor and a central tube in the reactor, wherein the central tube is provided with a liquid inlet channel and a liquid outlet channel, and further comprises a circulation pipe, wherein the inlet of the circulation pipe is located in the central tube and the outlet is located in the reactor outside the central tube.

[0006] Preferably, the circulation pipe is connected to a flow regulating pipe, and the outlet of the flow regulating pipe is located in the central tube.

[0007] Preferably, the central cylinder comprises a fixed cylinder and a rotating cylinder connected below the fixed cylinder and communicated with the fixed cylinder, the liquid outlet channel is arranged on the rotating cylinder and an angle is arranged between the radial direction of the liquid outlet channel and the rotating cylinder.

[0008] Preferably, a shunt pipe is provided on the rotating cylinder, and the liquid outlet channel is provided on the shunt pipe.

[0009] Preferably, the fixed cylinder and the rotating cylinder are connected by a bearing.

[0010] Preferably, there are more than two shunt tubes, and each shunt tube is provided with more than two liquid outlet channels.

[0011] Preferably, the diverter pipe comprises a fixed pipe and a rotating pipe which are connected to the rotating cylinder, and an angle is formed between the liquid outlet channel arranged on the rotating pipe and the radial direction of the rotating pipe.

[0012] Preferably, an angle is set between the liquid outlet direction of the circulation pipe and at least one liquid outlet channel.

[0013] Preferably, a three-phase reactor is arranged on the upper part of the reactor.

[0014] Compared with the prior art, the beneficial effects of the present invention are at least one of the following:

[0015] In the present application, a circulation pipe is provided. When wastewater is injected into the reactor from the liquid outlet channel and the circulation pipe, mixing of the wastewater and sludge at the bottom of the reactor can be caused. Compared with only providing a liquid outlet channel, the wastewater and sludge can be in more complete contact.

[0016] The present application is provided with a rotating drum, and through the rotation of the rotating drum, the wastewater leaving the liquid outlet channel can be more fully in contact with the sludge particles, thereby improving the efficiency and effect of wastewater treatment. In addition, convection can be generated between the wastewater flowing out of the liquid outlet channel and the wastewater flowing out of the circulation pipe, thereby strengthening the contact between the wastewater and the sludge particles.

[0017] The setting of the rotating tube enables the rotating tube to rotate under the reaction force of the wastewater leaving the liquid outlet channel while revolving around the rotating cylinder, so that the sludge particles and wastewater are fully in contact in the reaction zone at the bottom of the reactor without leaving dead corners. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the UASB anaerobic reactor of the present invention.

[0019] Figure 2 It is a schematic diagram of a structure of the central tube of the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] This embodiment provides a UASB anaerobic reactor, such as Figure 1 As shown, it includes a reactor 1 and a central tube 2 located in the reactor 1, wherein the central tube 2 is provided with a liquid inlet channel 21 and a liquid outlet channel 24, and also includes a circulation pipe 3, wherein the inlet of the circulation pipe 3 is located in the central tube 2, and the outlet is located in the reactor 1 outside the central tube 2.

[0022] In this embodiment, wastewater is injected into the central tube 2 through the liquid inlet channel 21. A liquid outlet channel 24 is provided at the bottom of the central tube 2, so that the wastewater leaves the central tube 2 and enters the reactor 1. In addition, the circulation pipe 3 in the present application also draws out the wastewater in the central tube 2 and injects it into the reactor 1. When the wastewater is injected into the reactor 1 from the liquid outlet channel 24 and the circulation pipe 3, it can cause mixing between the wastewater and sludge at the bottom of the reactor 1. Compared with only providing the liquid outlet channel 24, the wastewater and the sludge can be in more sufficient contact.

[0023] The circulation pipe 3 in this embodiment may be connected to a flow regulating pipe 4 , and the outlet of the flow regulating pipe 4 is located in the central tube 2 .

[0024] A pump is provided on the circulation pipe 3 to promote the flow of wastewater. When the flow of wastewater needs to be adjusted, the valve on the flow regulating pipe 4 can be opened to allow part of the wastewater to return to the central tube 2 through the flow regulating pipe 4. By adjusting the flow of wastewater injected into the bottom of the reactor 1 through the circulation pipe 3, the degree of contact between the wastewater and the sludge particles can be adjusted.

[0025] The central cylinder 2 in this embodiment may include a fixed cylinder 22 and a rotating cylinder 23 connected below the fixed cylinder 22 and communicating with the fixed cylinder 22. The liquid outlet channel 24 is provided on the rotating cylinder 23 and an angle is provided between the radial direction of the liquid outlet channel 24 and the rotating cylinder 23, such as Figure 2 shown.

[0026] The rotating drum 23 of this embodiment may be provided with an external power, such as being connected to a motor, or may rely on the reaction force generated by the wastewater leaving the liquid outlet channel 24 to drive the rotating drum 23 to rotate. The rotation speed of the rotating drum 23 may be achieved by adjusting the pressure when the wastewater leaves the liquid outlet channel.

[0027] The angle here can be on any plane, including but not limited to the horizontal direction and the vertical direction, and there can be one or more liquid outlet channels 24.

[0028] The rotating cylinder 23 rotates by relying on the reaction force generated by the wastewater leaving the liquid outlet channel 24: when there is only one liquid outlet channel 24, the liquid outlet channel 24 and the radial projection of the rotating cylinder 23 on the horizontal plane should have an angle, otherwise the rotating cylinder 23 is difficult to rotate and cannot be called a rotating cylinder 23; when there are multiple liquid outlet channels 24, the components of the reaction force generated by the wastewater leaving the multiple liquid outlet channels 24 on the horizontal plane should not offset each other, otherwise the rotating cylinder 23 is difficult to rotate and cannot be called a rotating cylinder 23.

[0029] In this embodiment, the liquid inlet channel 21, the inlet of the circulation pipe 3 and the outlet of the flow regulating pipe 4 are all arranged on the fixed cylinder 22, and the liquid outlet channel 24 is arranged on the rotating cylinder 23. Through the rotation of the rotating cylinder 23, the wastewater leaving the liquid outlet channel 24 can be more fully contacted with the sludge particles, thereby improving the efficiency and effect of wastewater treatment. In addition, convection can be generated between the wastewater flowing out of the liquid outlet channel 24 and the wastewater flowing out of the circulation pipe 3, thereby strengthening the contact between the wastewater and the sludge particles.

[0030] In this embodiment, a shunt tube 5 may be provided on the rotating cylinder 23 , and the liquid outlet channel 24 is provided on the shunt tube 5 .

[0031] The diversion pipe 5 is arranged on the rotating cylinder 23, which helps the wastewater to be injected into the bottom of the reactor 1 more evenly, thereby facilitating sufficient contact between the wastewater and the sludge particles.

[0032] In this embodiment, the fixed cylinder 22 and the rotating cylinder 23 can be connected by a bearing 6. The fixed cylinder 22 and the rotating cylinder 23 are connected by a bearing 6, which has a simple structure and is easy to use. When selecting a bearing, a bearing with a sealing effect can be selected to reduce the frequency of bearing replacement.

[0033] In this embodiment, there may be more than two shunt tubes 5 , and each shunt tube 5 is provided with more than two liquid outlet channels 24 .

[0034] More than two shunt pipes 5 may be randomly distributed on the rotating cylinder 23; or multiple shunt pipes 5 may be sequentially arranged along the circumference of the rotating cylinder 23, and then multiple layers may be arranged along the axial direction. The specific arrangement method may be selected according to actual conditions.

[0035] The liquid outlet channels 24 may be randomly distributed on the shunt tube 5; or a plurality of them may be sequentially arranged along the circumference of the shunt tube 5, and then arranged in multiple rows along the axial direction. The specific arrangement method may be selected according to actual conditions.

[0036] The multiple liquid outlet channels 24 may be arranged in the same direction or in different directions, and the specific arrangement method may be selected according to actual conditions.

[0037] The diversion pipe 5 in this embodiment may include a fixed pipe 51 and a rotating pipe 52 connected to the rotating cylinder 23 , and an angle is set between the liquid outlet channel 24 provided on the rotating pipe 52 and the radial direction of the rotating pipe 52 .

[0038] In actual operation, the rotating tube 52 can rotate on its own under the reaction force of the wastewater leaving the liquid outlet channel 24 while revolving around the rotating cylinder 23, so that the sludge particles and the wastewater are fully in contact in the reaction zone at the bottom of the reactor 1 without leaving any dead corners.

[0039] The liquid outlet direction of the circulation pipe 3 in this embodiment can be set to have an angle with at least one liquid outlet channel 24, which is conducive to full contact between sludge particles and wastewater.

[0040] The liquid outlet channel 24 in this embodiment can be a hole provided on the shunt tube 5, or a pipe extending therefrom, and can be specifically provided as required.

[0041] The upper part of the reactor 1 in this embodiment may be provided with a three-phase reactor, a biofilm zone, etc.

[0042] Although the present invention is described herein with reference to a number of illustrative embodiments of the present invention, it will be appreciated that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, drawings, and claims, a variety of variations and modifications may be made to the components and / or layout of the subject combination layout. In addition to the variations and modifications made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A UASB anaerobic reactor, comprising a reactor (1) and a central tube (2) located in the reactor (1), wherein the central tube (2) is provided with a liquid inlet channel (21) and a liquid outlet channel (24), characterized in that: It also includes a circulation pipe (3), wherein the inlet of the circulation pipe (3) is located in the central tube (2), and the outlet is located in the reactor (1) outside the central tube (2); The circulation pipe (3) is connected to a flow regulating pipe (4), and the outlet of the flow regulating pipe (4) is located in the central tube (2); The central cylinder (2) comprises a fixed cylinder (22) and a rotating cylinder (23) connected below the fixed cylinder (22) and in communication with the fixed cylinder (22); the liquid outlet channel (24) is arranged on the rotating cylinder (23), and an angle is arranged between the radial directions of the liquid outlet channel (24) and the rotating cylinder (23); The rotating cylinder (23) is provided with a shunt pipe (5), and the liquid outlet channel (24) is provided on the shunt pipe (5); The flow distribution pipe (5) comprises a fixed pipe (51) and a rotating pipe (52) which are in communication with the rotating cylinder (23); an angle is provided between the liquid outlet channel (24) provided on the rotating pipe (52) and the radial direction of the rotating pipe (52).

2. The UASB anaerobic reactor according to claim 1, characterized in that: The fixed cylinder (22) and the rotating cylinder (23) are connected via a bearing (6).

3. The UASB anaerobic reactor according to claim 1, characterized in that: There are more than two shunt pipes (5), and each shunt pipe (5) is provided with more than two liquid outlet channels (24).

4. The UASB anaerobic reactor according to claim 1, characterized in that: An angle is set between the liquid outlet direction of the circulation pipe (3) and at least one liquid outlet channel (24).

5. The UASB anaerobic reactor according to claim 1, characterized in that: A three-phase reactor is arranged on the upper part of the reactor (1).

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