A double cyclone water distributor and anaerobic reactor

Abstract

The present invention relates to a double cyclone water distributor and an anaerobic reactor, comprising an inner cyclone water distribution structure and an outer cyclone water distribution structure fixed at the bottom of the inner cavity of the anaerobic reactor, wherein the inner cyclone water distribution structure and the outer cyclone water distribution structure are not connected, and the inner cyclone water distribution structure, the outer cyclone water distribution structure, and the bottom surface of the anaerobic reactor between the inner cyclone water distribution structure and the outer cyclone water distribution structure jointly form a sludge collecting ring cone for collecting anaerobic sludge. The bidirectional cyclone formed by the double cyclone water distribution structure cooperates with the scattered water flow formed by the downcomer water distribution structure, and the three directions are strongly intertwined, thereby improving the mixing efficiency of sewage and anaerobic sludge, improving the mass transfer efficiency, and improving the reaction efficiency of the reactor.

Description

Technical Field

[0001] The invention relates to the field of water treatment, and in particular to a double cyclone water distributor and an anaerobic reactor. Background Art

[0002] In the field of sewage treatment, anaerobic biological treatment has the following advantages over aerobic biological treatment: 1. It has a wide range of applications and can treat various types of wastewater with high, medium and low concentrations. 2. It requires less energy and can generate a large amount of energy. 3. It has a high organic load. 4. It produces less residual sludge, and the anaerobic granular sludge produced can be used as a special strain of bacteria and has commercial value. 5. It has a small demand for nutrients. 6. It has a strong ability to withstand shock loads.

[0003] In the anaerobic reactor, sewage is mixed with anaerobic sludge through the water distribution structure, and anaerobic sludge degrades organic matter in sewage into biogas. Anaerobic sludge becomes lighter and floats up due to the production of biogas. After being separated by the three-phase separator, part of the anaerobic sludge increases in specific gravity after releasing biogas and sinks to the bottom of the anaerobic reactor, while the other part of the anaerobic sludge is mixed with biogas and sewage and collected in the gas-liquid separator at the top of the anaerobic reactor. In the gas-liquid separator, biogas is separated, collected and utilized, and muddy water flows into the bottom of the anaerobic reactor through the downcomer.

[0004] In anaerobic reactors, water distribution structure is one of the most core technologies, which is directly related to the mixing efficiency and mass transfer efficiency of anaerobic sludge and sewage, and directly affects the treatment efficiency of anaerobic reactors. The current anaerobic reactor water distribution structure commonly used includes branch perforated pipe water distribution and swirl water distribution, but these water distribution methods are all unidirectional flow water distribution, and only rely on water flow to impact the anaerobic sludge layer, resulting in uneven water distribution, short flow, channel flow, anaerobic sludge deposition, uneven mixing of anaerobic sludge and sewage, and low mass transfer efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a double cyclone water distributor and an anaerobic reactor comprising the double cyclone water distributor to solve the problem of low treatment efficiency of anaerobic reactor caused by uneven mixing of anaerobic sludge and sewage.

[0006] The technical solution of the present invention is: a double cyclone water distributor, which is special in that it includes an inner cyclone water distribution structure and an outer cyclone water distribution structure fixed at the bottom of the inner cavity of the anaerobic reactor, the inner cyclone water distribution structure and the outer cyclone water distribution structure are not connected, and the inner cyclone water distribution structure, the outer cyclone water distribution structure, and the bottom surface of the anaerobic reactor between the inner cyclone water distribution structure and the outer cyclone water distribution structure jointly form a sludge collecting ring cone for collecting anaerobic sludge.

[0007] Preferably, the internal vortex water distribution structure comprises an internal vortex water distribution cavity formed by sealing and fixing a water distribution reflection cone to the bottom surface of the anaerobic reactor, a plurality of groups of internal vortex water distribution nozzles penetrated on the conical baffle and arranged in a circular array around the vertical center axis of the internal vortex water distribution cavity, a first water inlet pipe and a sewage pipe connected to the internal vortex water distribution cavity, the sewage pipe is located on the opposite side of the first sewage pipe, the first water inlet pipe is provided with a first water inlet valve, and the sewage pipe is provided with a sewage valve.

[0008] Preferably, the angle between any two adjacent inner swirl water distribution nozzle groups is 10°-30°, and the inner swirl water distribution nozzle groups include at least three first water distribution nozzles located on the same busbar and oriented in the same direction, and the horizontal elevation angle of the first water distribution nozzles is 15°-45°.

[0009] Preferably, the external vortex water distribution structure comprises a cone-shaped baffle which is sealed and fixed to the side wall and the bottom of the anaerobic reactor respectively to form an external vortex water distribution chamber, a second water inlet pipe connected to the external vortex water distribution chamber, and several groups of water distribution branches connected to the external vortex water distribution chamber and the inner cavity of the anaerobic reactor. The several groups of water distribution branches are arranged in a circular array around the vertical central axis of the anaerobic reactor, the second water inlet pipe is provided with a second water inlet valve, and the end of the water distribution branch pipe is provided with a second water distribution nozzle.

[0010] As a preference: the water distribution branch pipe is led out from the outer cyclone water distribution cavity to the outside of the anaerobic reactor, and extends into the inner cavity of the anaerobic reactor after being bent several times. The pipe body of the water distribution branch pipe located in the anaerobic reactor is fixed on the cone-shaped partition plate. The water distribution branch pipe is provided with a first control valve at the water outlet of the outer cyclone water distribution cavity, and a second control valve is provided at the water inlet of the inner cavity of the anaerobic reactor. A first branch pipe is extended on the pipeline between the first control valve and the second control valve, and the end of the first branch pipe is sealed by a blind plate.

[0011] The water distribution branch pipe is located in the anaerobic reactor and is provided with at least three second water distribution nozzles with the same orientation, and the orientation of the second water distribution nozzles is opposite to that of the first water distribution nozzles.

[0012] Preferably, the angle between the conical baffle and the bottom surface of the anaerobic reactor is greater than 45°, the height of the connection point between the conical baffle and the inner wall of the anaerobic reactor is higher than 1.5m, the angle between two adjacent groups of water distribution branches is 10°-30°, the arc length of the spacing is 1.0m-2.0m, and the horizontal elevation angle of the second water distribution nozzle is 15°-45°.

[0013] Another technical solution provided by the present invention is: an anaerobic reactor, which is special in that it includes a double cyclone water distributor as described in any one of claims 1 to 6, and also includes a mixing downcomer water distribution structure, the mixing downcomer water distribution structure includes a gas-liquid separator, a mixing downcomer connected to the bottom of the gas-liquid separator, a third water inlet valve is provided on the mixing downcomer, and the water outlet of the mixing downcomer is located at the tip of the water distribution reflection cone.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The outer cyclone water distribution structure and the inner cyclone water distribution structure of the double cyclone water distributor provided by the present invention both adopt a water distribution chamber structure, and a plurality of water distribution nozzles are arranged in a circular array on the water distribution chamber, so that the pressure and flow of each group of branch pipes and water distribution nozzles are balanced, and the water volume and water pressure of the inlet and outlet water are balanced, forming a stable cyclone;

[0016] (2) The external cyclone water distribution structure, the internal cyclone water distribution structure and the bottom surface of the anaerobic reactor constitute a sludge collecting ring cone. The anaerobic sludge that descends after separating the biogas in the anaerobic reactor is collected into the sludge collecting ring cone area along the cone-shaped baffle and the conical surface of the water distribution reflection cone. The three water distribution structures of external cyclone water distribution, internal cyclone water distribution and mixed downcomer water distribution work together with the sludge collecting ring cone area to fully mix the anaerobic sludge and sewage. In addition, due to the relatively small space of the sludge collecting cone ring and the large water distribution flow rate, the sludge at the bottom of the anaerobic reactor can be fully stirred, thus avoiding the deposition of anaerobic sludge and improving the treatment efficiency of the anaerobic reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the anaerobic reactor of the present invention;

[0018] Figure 2 It is a structural schematic diagram of another direction of the anaerobic reactor of the present invention.

[0019] Main component symbols

[0020] 1 tank 21 Gas-liquid separator 22 Mixing down pipe 23 The third water inlet valve 31 cloth water reflection cone 32 Internal swirl water distribution cavity 33 The first water distribution nozzle 34 First water inlet pipe 341 first water inlet valve 35 sewage pipe 351 Blowdown Valve 41 cone-shaped partition 42 External cyclone water distribution chamber 43 Second water inlet pipe 431 Second water inlet valve 44 water distribution branch pipe 441 first control valve 442 Second control valve 45 First branch 451 Blind Plate 46 Second water distribution nozzle DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings:

[0022] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more explicit definition of the protection scope of the present invention. The directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc., are only referenced to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present invention, rather than to limit the present invention.

[0023] See also Figure 1 , Figure 2 As shown, the anaerobic reactor includes a tank body 1, a double cyclone water distributor fixed at the bottom of the inner cavity of the anaerobic reactor, and a mixing downpipe water distribution structure fixed above the anaerobic reactor. The mixing downpipe water distribution structure includes a gas-liquid separator 21 and a mixing downpipe 22 connected to the bottom of the gas-liquid separator 21. A third water inlet valve 23 is provided on the mixing downpipe 22. The mixing downpipe 22 passes through the tank body 1 and enters the inner cavity of the anaerobic reactor.

[0024] The double cyclone water distributor arranged at the bottom of the inner cavity of the anaerobic reactor includes an inner cyclone water distribution structure fixed at the center of the bottom of the inner cavity of the anaerobic reactor and an outer cyclone water distribution structure fixed at the outer edge of the bottom of the inner cavity of the anaerobic reactor. The inner cyclone water distribution structure and the outer cyclone water distribution structure are not connected. The conical surface of the water distribution reflection cone of the inner cyclone water distribution structure, the bottom surface of the inner cavity of the anaerobic reactor and the conical surface of the cone-shaped partition of the outer cyclone water distribution structure jointly form a mud collecting ring cone 5 for collecting anaerobic sludge. The sewage of the inner cyclone water distribution structure and the sewage of the outer cyclone water distribution structure are both discharged into the mud collecting ring cone 5 and are fully mixed with the anaerobic sludge.

[0025] The inner vortex water distribution structure includes an inner vortex water distribution chamber 32 formed inside after a water distribution reflection cone 31 is sealed and fixed to the bottom surface of the anaerobic reactor, a plurality of groups of inner vortex water distribution nozzle groups are arranged on the conical baffle 31 and arranged in a circular array around the vertical center axis of the inner vortex water distribution chamber 32, a first water inlet pipe 34 and a sewage pipe 35 connected to the inner vortex water distribution chamber, the sewage pipe 35 is located on the opposite side of the first sewage pipe 34, a first water inlet valve 341 is provided on the first water inlet pipe 34, and a sewage valve 351 is provided on the sewage pipe 35. The inner vortex water distribution chamber 32 is connected to the external pipeline through the first water inlet pipe 34, and the sludge that is backwashed into the inner vortex water distribution chamber 32 is discharged through the sewage pipe 35.

[0026] The water outlet of the mixing downcomer is located exactly at the tip of the water distribution reflection cone 31 .

[0027] The angle between any two adjacent inner swirl water distribution nozzle groups is 10°-30°. The inner swirl water distribution nozzle groups include four first water distribution nozzles 33 located on the same busbar and oriented in the same direction. The horizontal elevation angle of the first water distribution nozzles 33 is 15°-45°.

[0028] When the first water distribution nozzle is clogged with sludge, close the first water inlet valve, open the sewage valve, and the sewage in the inner vortex water distribution chamber flows out along the sewage pipe. The liquid level in the inner vortex water distribution chamber drops, and the liquid level difference formed by the sludge collecting ring cone and the inner vortex water distribution chamber is used to discharge the first water distribution nozzle through back pressure, and the clogged sludge also flows out through the sewage pipe. After the first water distribution nozzle resumes working, close the sewage valve, open the first water inlet valve, and resume the discharge of the inner vortex sewage.

[0029] The external vortex water distribution structure comprises a cone-shaped baffle plate 41 which is sealed and fixed to the side wall and the bottom of the anaerobic reactor to form an external vortex water distribution chamber 42, a second water inlet pipe 43 connected to the external vortex water distribution chamber 42, and a plurality of water distribution branch pipes 44 connected to the external vortex water distribution chamber 42 and the inner cavity of the anaerobic reactor. The plurality of water distribution branch pipes 44 are arranged in a circular array around the vertical central axis of the chamber 1, and a second water inlet valve 431 is provided on the second water inlet pipe 43;

[0030] The water distribution branch pipe 44 is led out from the outer vortex water distribution chamber 42 to the outside of the anaerobic reactor, and extends into the inner cavity of the anaerobic reactor after being bent several times. The pipe body of the water distribution branch pipe 44 located in the anaerobic reactor is fixed on the cone-shaped partition plate 41. The water distribution branch pipe 44 is provided with a first control valve 441 at the water outlet of the outer vortex water distribution chamber 42, and a second control valve 442 is provided at the water inlet of the inner cavity of the anaerobic reactor. A first branch pipe 45 extends on the pipeline between the first control valve 441 and the second control valve 442, and the end of the first branch pipe 45 is sealed by a blind plate 451.

[0031] The water distribution branch pipe 44 is located in the anaerobic reactor and is provided with at least three second water distribution nozzles 46 with the same orientation. The orientation of the second water distribution nozzles 46 is opposite to that of the first water distribution nozzles 33 .

[0032] The angle between the conical bucket-shaped baffle 41 and the bottom surface of the anaerobic reactor is greater than 45°, the height of the fixed point between the conical bucket-shaped baffle 41 and the inner wall of the anaerobic reactor is higher than 1.5m, the angle between two adjacent groups of water distribution branch pipes 44 is 10°-30°, the arc length of the spacing is 1.0m-2.0m, and the horizontal elevation angle of the second water distribution nozzle 46 is 15°-45°.

[0033] When the second water distribution nozzle or the water distribution branch pipe is blocked by sludge, close the first control valve and the second control valve, open the blind plate, and then open the second control valve. Under the action of pressure, the sewage is backwashed together with the sludge and discharged from the blind plate branch pipe, thereby unblocking the second water distribution nozzle or the water distribution branch pipe. After the water distribution branch pipe or the second water distribution nozzle is unblocked, close the second control valve and then the blind plate, and then open the first control valve and the second control valve in sequence to resume the discharge of the external vortex sewage.

[0034] Working principle:

[0035] The muddy water entering through the mixing downcomer 22 is scattered by the water distribution reflection cone 31 and evenly enters the mud collecting ring cone 3 composed of the cone surface of the outer cyclone water distribution structure, the cone surface of the inner cyclone water distribution structure, and the bottom surface of the inner cavity of the anaerobic reactor; the sewage enters the outer cyclone water distribution cavity 42, is evenly distributed to each group of water distribution branch pipes 44, and then is evenly sprayed out through each group of second water distribution nozzles 46 to form a cyclone and fully mix with the anaerobic sludge deposited in the mud collecting ring cone 3; at the same time, the sewage enters the inner cyclone water distribution cavity 22, is evenly sprayed out through each group of first water distribution nozzles 33, and forms a cyclone and fully mixes with the anaerobic sludge in the mud collecting ring cone;

[0036] The external vortex formed by the external vortex water distribution structure, the reverse internal vortex formed by the internal vortex water distribution structure, and the scattered water flow formed by the impact water distribution reflection cone of the mixing downcomer water distribution structure are strongly intertwined, which improves the mixing efficiency of sewage and anaerobic sludge, improves the mass transfer efficiency, and improves the reaction efficiency of the reactor.

[0037] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A double cyclone water distributor, characterized in that: It includes an inner cyclone water distribution structure and an outer cyclone water distribution structure fixed at the bottom of the inner cavity of the anaerobic reactor, wherein the inner cyclone water distribution structure and the outer cyclone water distribution structure are not connected, and the inner cyclone water distribution structure, the outer cyclone water distribution structure, and the bottom surface of the anaerobic reactor between the inner cyclone water distribution structure and the outer cyclone water distribution structure jointly form a sludge collecting ring cone for collecting anaerobic sludge; The inner vortex water distribution structure comprises an inner vortex water distribution cavity formed by sealing and fixing a water distribution reflection cone to the bottom surface of the anaerobic reactor, a plurality of groups of inner vortex water distribution nozzles arranged on the conical baffle and arranged in a circular array around the vertical central axis of the inner vortex water distribution cavity, a first water inlet pipe and a sewage pipe connected to the inner vortex water distribution cavity, the sewage pipe is located on the opposite side of the first drainage pipe, the first water inlet pipe is provided with a first water inlet valve, and the sewage pipe is provided with a sewage valve; The external vortex water distribution structure comprises a cone-shaped partition plate which is sealed and fixed to the side wall of the anaerobic reactor and the bottom surface of the anaerobic reactor to form an external vortex water distribution cavity, a second water inlet pipe connected to the external vortex water distribution cavity, and a plurality of water distribution branch pipes connected to the external vortex water distribution cavity and the inner cavity of the anaerobic reactor. The plurality of water distribution branch pipes are arranged in a circular array around the vertical central axis of the anaerobic reactor, a second water inlet valve is provided on the second water inlet pipe, and a second water distribution nozzle is provided at the end of the water distribution branch pipe; The water distribution branch pipe is led out from the outer cyclone water distribution cavity to the outside of the anaerobic reactor, and extends into the inner cavity of the anaerobic reactor after being bent several times. The pipe body of the water distribution branch pipe located in the anaerobic reactor is fixed on the cone-shaped partition plate. The water distribution branch pipe is provided with a first control valve at the water outlet of the outer cyclone water distribution cavity, and a second control valve is provided at the water inlet of the inner cavity of the anaerobic reactor. A first branch pipe is extended on the pipeline between the first control valve and the second control valve, and the end of the first branch pipe is sealed by a blind plate. The water distribution branch pipe is located in the anaerobic reactor and is provided with at least three second water distribution nozzles with the same orientation, and the orientation of the second water distribution nozzles is opposite to that of the first water distribution nozzles.

2. The double cyclone water distributor according to claim 1, characterized in that: The angle between any two adjacent inner swirl water distribution nozzle groups is 10°-30°. The inner swirl water distribution nozzle groups include at least three first water distribution nozzles located on the same busbar and oriented in the same direction. The horizontal elevation angle of the first water distribution nozzles is 15°-45°.

3. The double cyclone water distributor according to claim 1, characterized in that: The angle between the conical bucket-shaped baffle and the bottom surface of the anaerobic reactor is greater than 45°, the height of the connection point between the conical bucket-shaped baffle and the inner wall of the anaerobic reactor is higher than 1.5m, the angle between two adjacent groups of water distribution branch pipes is 10°-30°, the arc length of the spacing is 1.0m-2.0m, and the horizontal elevation angle of the second water distribution nozzle is 15°-45°.

4. An anaerobic reactor, characterized in that: It comprises a double cyclone water distributor as described in any one of claims 1 to 3, and also comprises a mixing down pipe water distribution structure, wherein the mixing down pipe water distribution structure comprises a gas-liquid separator and a mixing down pipe connected to the bottom of the gas-liquid separator, a third water inlet valve is provided on the mixing down pipe, and the water outlet of the mixing down pipe is located at the tip of the water distribution reflection cone.

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