UASB reactor and hydrolytic acidification system

Abstract

The UASB reactor is characterized in that a first three-phase separator, a pressurizing conveyor and a second three-phase separator are arranged at intervals from bottom to top, a plurality of Tesla grooves are vertically formed in a box body of the pressurizing conveyor, and wing-shaped obstacles of the Tesla grooves are arranged upwards, so that the Tesla grooves are communicated from bottom to top. The high-efficiency sewage treatment system has good sewage treatment efficiency for sewage with large organic matter concentration, large sludge load and good wastewater biodegradability, stable operation of the whole sewage treatment system is not affected, the pressurizing conveyor can pressurize and convey sludge flocculates penetrating through the first three-phase separator to the lower part of the second three-phase separator, and the sludge flocculates are separated from the first three-phase separator and the second three-phase separator. When penetrating through the wing-shaped obstacles of the Tesla tank, sludge floccules are divided into two paths and are converged at the heads of the wing-shaped obstacles, and under the pressurization action of the wing-shaped obstacles, the flow speed and pressure of the sludge floccules are increased, so that the pressurization effect is achieved, and the situation that the ascending flow speed of the sludge floccules is reduced due to the arrangement of two three-phase separators is avoided; and sludge stirring is not facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a UASB reactor and a hydrolysis acidification system. Background Art

[0002] In the field of sewage treatment, hydrolysis acidification system and upflow anaerobic sludge blanket (UASB) reactor are one of the commonly used high-efficiency sewage treatment technologies. Traditional hydrolysis acidification system usually has a three-phase separator in the hydrolysis acidification tank, which is mainly used to achieve effective separation of gas, liquid and solid phases to ensure the stability and efficiency of the sewage treatment process. However, with the rapid development of industrial production and the continuous increase in sewage treatment needs, the limitations of existing technologies have gradually become apparent.

[0003] Especially for sewage with high organic matter concentration, large sludge load and good biodegradability, the gas production is often large, which puts higher requirements on the treatment capacity of the three-phase separator. When treating such high-load sewage, traditional single-layer three-phase separators are often difficult to meet actual needs, resulting in reduced treatment efficiency and even affecting the stable operation of the entire sewage treatment system.

[0004] In addition, the prior art generally does not have a dedicated sludge treatment device outside the hydrolysis acidification tank, which leads to excessive accumulation of sludge in the hydrolysis acidification tank. Excessive accumulation of sludge not only reduces the sewage treatment efficiency, but also may cause sludge acidification, further affecting the activity of the sludge, thereby adversely affecting the performance and stability of the entire sewage treatment system. Summary of the invention

[0005] The purpose of the present invention is to provide a UASB reactor and a hydrolysis acidification system to solve the above problems existing in the prior art.

[0006] The technical solution of the present invention to solve the above technical problems is as follows:

[0007] A UASB reactor comprises a first three-phase separator, a second three-phase separator and a pressurized conveyor. The first three-phase separator, the pressurized conveyor and the second three-phase separator are arranged at intervals from bottom to top. A plurality of Tesla slots are vertically opened on the box body of the pressurized conveyor. The wing-shaped barriers of the Tesla slots are arranged upward to make the Tesla slots conductive from bottom to top.

[0008] The beneficial effects of the present invention are as follows: two three-phase separators are arranged, and for sewage with a high organic matter concentration, a large sludge load, and good wastewater biodegradability, there is a better sewage treatment efficiency, and the stable operation of the entire sewage treatment system will not be affected. At the same time, the pressurized conveyor can pressurize and convey the sludge flocs that pass through the first three-phase separator to the lower part of the second three-phase separator. When the sludge flocs pass through the wing-shaped obstacles of the Tesla trough, they are split into two paths and converge at the head of the wing-shaped obstacles. Under the pressurized action of multiple wing-shaped obstacles, the flow rate and pressure of the sludge flocs become larger, thereby achieving a pressurization effect, avoiding the problem that the rising flow rate of the sludge flocs is reduced due to the arrangement of two three-phase separators, which is not conducive to sludge stirring.

[0009] Based on the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, a second V-shaped notch is invertedly arranged at the lower portion of each Tesla slot.

[0011] A further beneficial effect of the above method is that the sludge flocs treated by the first three-phase separator are gathered into the Tesla tank.

[0012] Another technical solution of the present invention is as follows:

[0013] A hydrolysis acidification system is used to house the above-mentioned UASB reactor, including a hydrolysis acidification tank, a sludge tank, a pump room and a sludge pipe network. The UASB reactor is arranged in the cell of the hydrolysis acidification tank. The sludge pipe network includes sludge branch pipes respectively connected to multiple cells and a sludge main pipe connected to multiple sludge branch pipes. The sludge main pipe is connected to the sludge tank and the pump room in turn. The sludge tank and the pump room are connected to external equipment through a first sludge pipe and a second sludge pipe respectively.

[0014] By setting up a sludge pool and a pump room, the pump room is connected to the sludge pool to provide power for the sludge discharge and sludge replenishment operations in the hydrolysis acidification pool. Combined with the sludge pipeline network, the sludge in the hydrolysis acidification pool can be controlled to avoid sludge accumulation that reduces sewage treatment efficiency and causes sludge acidification, thereby increasing sludge activity and improving the performance and stability of the hydrolysis acidification system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a UASB reactor of the present invention Figure 1 ;

[0016] Figure 2 A schematic diagram of the structure of a UASB reactor of the present invention Figure 2 ;

[0017] Figure 3 This is a schematic diagram of a hydrolysis acidification system of the present invention.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0019] 1. Hydrolysis acidification tank; 11. Cell; 12. Water distribution network; 2. Sludge tank; 3. Pump room; 4. Inlet network; 41. Inlet main pipe; 42. Inlet branch pipe; 5. Vent network; 51. Vent main pipe; 52. Vent branch pipe; 6. Sludge network; 61. Sludge main pipe; 62. Sludge branch pipe; 7. Return pipeline; 71. Return main pipe; 72. Return branch pipe; 8. First sludge pipe; 9. Second sludge pipe; 10. UASB reactor; 101. First three-phase separator; 102. Second three-phase separator; 103. Pressurized conveyor; 1031. Box; 1032. Tesla tank; 1033. First V-shaped notch; 1034. Second V-shaped notch. DETAILED DESCRIPTION

[0020] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0021] Example 1

[0022] like Figure 1 to Figure 2 As shown, a UASB reactor includes a first three-phase separator 101, a second three-phase separator 102 and a pressurized conveyor 103. The first three-phase separator 101, the pressurized conveyor 103 and the second three-phase separator 102 are arranged at intervals from bottom to top. A plurality of Tesla slots 1032 are vertically opened on a box body 1031 of the pressurized conveyor 103. The wing-shaped barriers of the Tesla slots 1032 are arranged upward to make the Tesla slots 1032 conductive from bottom to top.

[0023] Two three-phase separators are set up, which can achieve better sewage treatment efficiency for sewage with high organic matter concentration, large sludge load and good wastewater biodegradability, and will not affect the stable operation of the entire sewage treatment system. At the same time, the pressurized conveyor 103 can pressurize and convey the sludge flocs passing through the first three-phase separator 101 to the lower part of the second three-phase separator 102. When the sludge flocs pass through the wing-shaped obstacles of the Tesla tank 1032, they are split into two paths and converge at the head of the wing-shaped obstacles. Under the pressurized action of multiple wing-shaped obstacles, the flow rate and pressure of the sludge flocs become larger, thereby achieving a pressurization effect, avoiding the problem of reduced rising flow rate of the sludge flocs caused by setting up two three-phase separators, which is not conducive to sludge stirring.

[0024] Example 2

[0025] like Figure 1 to Figure 2 As shown, this embodiment is a further improvement on the basis of embodiment 1, and the details are as follows:

[0026] A second V-shaped notch 1034 is invertedly provided at the bottom of each Tesla tank 1032 to gather the sludge flocs processed by the first three-phase separator 101 into the Tesla tank 1032 .

[0027] A first V-shaped notch 1033 is provided at the upper portion of each Tesla tank 1032, so that the sludge floccules subjected to the pressure treatment of the pressure conveyor 103 can be quickly diffused to the lower portion of the second three-phase separator 102, which is beneficial to the subsequent treatment of the sludge floccules.

[0028] Example 3

[0029] like Figure 3 As shown, a hydrolysis acidification system is used to house the above-mentioned UASB reactor, including a hydrolysis acidification tank 1, a sludge tank 2, a pump house 3 and a sludge pipe network 6. A UASB reactor 10 is arranged in a cell 11 of the hydrolysis acidification tank 1. The sludge pipe network 6 includes sludge branch pipes 62 respectively connected to a plurality of cells 11 and a sludge main pipe 61 connected to a plurality of sludge branch pipes 62. The sludge main pipe 61 is sequentially connected to the sludge tank 2 and the pump house 3. The sludge tank 2 and the pump house 3 are respectively connected to external equipment through a first sludge pipe 8 and a second sludge pipe 9. By setting up the sludge tank 2 and the pump house 3, the pump house 3 is connected to the sludge tank 2 to provide power for the sludge discharge operation and sludge replenishment operation of the sludge in the hydrolysis acidification tank 1. In combination with the sludge pipe network 6, the sludge in the hydrolysis acidification tank 1 is controlled to avoid sludge accumulation to reduce the sewage treatment efficiency and cause sludge acidification, improve sludge activity, and thus improve the performance and stability of the hydrolysis acidification system.

[0030] Example 4

[0031] like Figure 2 As shown, this embodiment is a further improvement on the basis of embodiment 3, and the details are as follows:

[0032] The unit cell 11 is provided with sludge branch pipes 62 at the bottom of the first three-phase separator 101 and the top of the pressurized conveyor 103. By providing two sludge branch pipes 62, the sludge filling and discharge work at the bottom of the first three-phase separator 101 and the top of the pressurized conveyor 103 can be accurately and quickly performed, thereby improving the efficiency of sludge filling and discharge.

[0033] Example 5

[0034] like Figure 3 As shown, this embodiment is a further improvement on the basis of embodiment 4, and the details are as follows:

[0035] It also includes an inlet pipe network 4, which includes inlet branches 42 respectively connected to the multiple cells 11 and an inlet main pipe 41 connecting the multiple inlet branches 42, and the inlet branch 42 is connected to the water distribution pipe network 12 at the bottom of the cell 11. The water enters from the bottom, and the sewage passes through the sludge bed containing sludge flocs from the bottom upward to produce anaerobic reaction, with a large reaction contact area and higher efficiency; the biogas rises from the bottom of the cell 11, causing the circulation of sludge flocs inside the cell 11, which is more conducive to the formation and maintenance of sludge flocs.

[0036] The venting pipe network 5 is also included. The venting pipe network 5 includes venting branches 52 respectively arranged at the bottom of the cells 11 and a venting main pipe 51 connecting multiple venting branches 52. The venting branches 52 are connected to external equipment. The venting pipe network 5 is arranged at the bottom of the cell 11. During maintenance, it can work together with the sludge pipe network 6 to discharge the sludge and water in the cell 11, and the discharge is more thorough.

[0037] It also includes a return pipeline 7, which includes a return branch pipe 72 connected to the water inlet branch pipe 42 and a return main pipe 71 connecting multiple return branch pipes 72. The pump room 3 pumps sewage from the sludge tank 2, and the sewage enters the hydrolysis acidification tank 1 from the water inlet pipe network 4 through the return pipeline 7. Part of the sewage in the hydrolysis acidification tank 1 returns to the sludge tank 2 through the sludge pipe network 6 to achieve reflux. The effluent with lower water quality index at the bottom of the three-phase separator of the hydrolysis acidification tank has a dilution effect on the high-concentration wastewater in the influent; the anaerobic mixed liquid at the bottom of the separator is refluxed to the influent side, which is conducive to the anaerobic reaction and can ensure higher efficiency of hydrolysis acidification.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A UASB reactor, characterized in that: The invention comprises a first three-phase separator (101), a second three-phase separator (102) and a pressurized conveyor (103); the first three-phase separator (101), the pressurized conveyor (103) and the second three-phase separator (102) are arranged at intervals from bottom to top; a plurality of Tesla slots (1032) are vertically opened on a box body (1031) of the pressurized conveyor (103); wing-shaped barriers of the Tesla slots (1032) are arranged upwards so that the Tesla slots (1032) are connected from bottom to top.

2. The UASB reactor according to claim 1, characterized in that: A second V-shaped notch (1034) is invertedly disposed at the lower portion of each Tesla slot (1032).

3. The UASB reactor according to claim 2, characterized in that: A first V-shaped notch (1033) is provided on the upper portion of each Tesla groove (1032).

4. A hydrolysis acidification system, characterized in that: A device for accommodating a UASB reactor (10) as claimed in any one of claims 1 to 3, comprising a hydrolysis acidification tank (1), a sludge tank (2), a pump room (3) and a sludge pipe network (6), wherein the UASB reactor (10) is arranged in a cell (11) of the hydrolysis acidification tank (1), and the sludge pipe network (6) comprises sludge branch pipes (62) respectively connected to a plurality of the cells (11) and a sludge main pipe (61) connected to the plurality of sludge branch pipes (62), wherein the sludge main pipe (61) is connected to the sludge tank (2) and the pump room (3) in sequence, and the sludge tank (2) and the pump room (3) are connected to external equipment via a first sludge pipe (8) and a second sludge pipe (9), respectively.

5. The hydrolysis acidification system according to claim 4, characterized in that: The unit cell (11) is provided with the sludge branch pipe (62) at the bottom of the first three-phase separator (101) and at the top of the pressurized conveyor (103).

6. The hydrolysis acidification system according to claim 5, characterized in that: It also includes a water inlet network (4), the water inlet network (4) including water inlet branch pipes (42) respectively connected to the plurality of cells (11) and a water inlet main pipe (41) connected to the plurality of water inlet branch pipes (42), the water inlet branch pipes (42) being connected to the water distribution network (12) at the bottom of the cell (11).

7. The hydrolysis acidification system according to claim 6, characterized in that: The device also comprises a venting pipe network (5), wherein the venting pipe network (5) comprises venting branches (52) respectively arranged at the bottom of the cells (11) and a venting main pipe (51) connecting a plurality of the venting branches (52), and the venting branches (52) are connected to external equipment.

8. The hydrolysis acidification system according to claim 7, characterized in that: It also comprises a return pipeline (7), wherein the return pipeline (7) comprises a return branch pipe (72) connected to the water inlet branch pipe (42) and a return main pipe (71) connecting a plurality of the return branch pipes (72).

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