CN205575774U - Efficient D -UASB reactor - Google Patents

Abstract

The utility model discloses a high-efficiency D-UASB reactor, which comprises a reactor tank body with a hollow airtight cavity structure. The bottom of the reactor tank body is provided with a water inlet distribution pipe. A first-level three-phase separator and a second-level three-phase separator are correspondingly provided, and the second-level three-phase separator is located above the first-level three-phase separator; a gas-water separator is correspondingly provided above the reactor tank , the first-stage three-phase separator communicates with the gas-water separator through the biogas collection pipe of the first-stage three-phase separator, the lower part of the gas-water separator is provided with a circulating water pipe, and the circulating water pipe corresponds to the reactor tank connected. The utility model greatly improves the removal rate in a limited volume; solves the phenomenon of mud running in the UASB system, and the reactor of the utility model can have more sludge during operation because of the larger height-to-diameter ratio. The ability to resist impact load is improved; the utility model occupies a small area.

Description

A High Efficiency D-UASB Reactor

technical field

The utility model relates to the field of sewage treatment equipment, in particular to an efficient D-UASB reactor.

Background technique

With the development of science and the continuous deepening of scientific research, many new technologies, new materials and new ideas are widely used in the environmental protection industry, which has made great progress in my country's environmental protection technology. Most of the wastewater discharged from food, biology, chemical and other industries is high-concentration organic wastewater. It is difficult to achieve the purpose of treatment by conventional physicochemical and biochemical treatments. At the same time, there are a series of problems such as large investment and high operating costs. Anaerobic wastewater treatment technology is playing an increasingly important role in wastewater treatment due to its advantages of low operating cost, energy saving, and easy sludge treatment.

The upflow anaerobic sludge bed reactor is currently the most widely used and most stable anaerobic biological method for sewage treatment, also known as the upflow anaerobic sludge bed. There is a short flow in the sludge bed of the traditional UASB system Phenomenon, which affects the processing capacity, and is sensitive to sudden changes in water quality and load, and has poor impact resistance. Due to temperature restrictions in northern cities in my country, it is difficult to cultivate granular sludge in the actual UASB system of the project (even if the granular sludge is purchased at a high price during the commissioning stage, the granular sludge will disintegrate after a period of operation), and most Most of them operate in the form of flocculent sludge. Compared with the granular sludge UASB system, the flocculent UASB system has two fatal defects: ①The removal rate is reduced; ②The sludge settleability is poor, and the UASB system effluents mud.

Utility model content

In order to overcome the defects in the prior art, an efficient D-UASB reactor is provided.

The utility model is realized through the following scheme:

A high-efficiency D-UASB reactor, including a reactor tank with a hollow and closed cavity structure, the bottom of the reactor tank is provided with a water inlet distribution pipe, and a first-level three a phase separator and a secondary three-phase separator, the secondary three-phase separator is located above the primary three-phase separator;

A gas-water separator is correspondingly provided above the reactor tank, and the first-stage three-phase separator is connected to the gas-water separator through the biogas collection pipeline of the first-stage three-phase separator. The lower part is provided with a circulating water pipe, which communicates with the reactor tank correspondingly;

The secondary three-phase separator is connected to the biogas collection pipeline of the secondary three-phase separator, and the biogas collection pipeline and the gas-water separator of the secondary three-phase separator are connected to the biogas storage tank correspondingly. A water outlet weir plate is correspondingly arranged above the phase separator.

The outlet of the circulating water pipe is located below the primary three-phase separator, and a baffle is provided at the outlet of the circulating water pipe.

The primary three-phase separator is fixed to the inner wall of the reactor tank through the primary three-phase separator support ring, and the secondary three-phase separator is fixed to the inner wall of the reactor tank through the secondary three-phase separator support ring. inner wall.

The reactor tank body is provided with a variable diameter area, the diameter of the upper part of the variable diameter area is larger than the diameter of the lower part, the first-stage three-phase separator is arranged at the lower part of the variable diameter area, and the second-stage three-phase separator Set on the upper part of the diameter reducing area.

A transparent observation window is provided on the side of the reactor tank body.

An emptying pipe is provided at the bottom of the reactor tank.

The bottom of the reactor tank body is correspondingly provided with supporting feet, and the supporting feet are correspondingly connected with the rollers.

The beneficial effects of the utility model are:

The technical problem solved by the utility model is that in terms of the removal effect, the expansion rate of the sludge bed in the reactor of the utility model is increased, the water mixing effect is better, and the removal rate is greatly improved in a limited volume; Because of its double-layer three-phase separator design, larger height-to-diameter ratio and cone-mouth sedimentation zone design, the reactor solves the phenomenon of mud running in the UASB system. The reactor of the utility model has less suspended solids in the system effluent, And it can effectively guarantee the sludge content and microbial biomass of the system; because of the larger aspect ratio of the reactor of the utility model, there can be more sludge volume during operation, and the ability to resist impact load has been improved; The utility model reactor is also obviously superior to the traditional UASB from the perspective of engineering investment; it occupies a small area.

Description of drawings

Fig. 1 is a structural schematic diagram of a high-efficiency D-UASB reactor of the present invention.

In the figure: 1 is the water inlet distribution pipe, 2 is the circulating water pipe, 3 is the support ring of the first-level three-phase separator, 4 is the first-level three-phase separator, 5 is the variable diameter area, 6 is the second-level three-phase separator, 7 is the biogas collection pipeline of the secondary three-phase separator, 8 is the outlet weir plate, 9 is the gas-water separator, 10 is the biogas collection pipeline of the primary three-phase separator, 11 is the reactor tank, and 12 is the baffle plate, 13 is a secondary three-phase separator supporting ring, 14 is an observation window, 15 is an emptying pipe, 16 is a leg, and 17 is a roller.

detailed description

Below in conjunction with Fig. 1, the preferred embodiment of the present utility model is further described:

A kind of high-efficiency D-UASB reactor, comprises the reactor tank body 11 of hollow airtight cavity structure, the bottom of described reactor tank body 11 is provided with water inlet distribution pipe 1, in described reactor tank body 11 also A first-level three-phase separator 4 and a second-level three-phase separator 6 are correspondingly provided, and the second-level three-phase separator 6 is located above the first-level three-phase separator 4;

A gas-water separator 9 is correspondingly provided above the reactor tank body 11, and the first-stage three-phase separator 4 communicates with the gas-water separator 9 through a first-stage three-phase separator biogas collection pipeline 10. The lower part of the gas-water separator 9 is provided with a circulating water pipe 2, which communicates with the reactor tank 11 correspondingly; the biogas and water mixture produced by the first-stage three-phase separator is transported through the first-stage three-phase separator biogas collection pipeline To the gas-water separator, the separated biogas enters the biogas storage tank, and the liquid flows back to the bottom of the reactor tank through the circulating water pipe.

The secondary three-phase separator 6 is correspondingly communicated with the biogas collection pipeline 7 of the secondary three-phase separator, and the biogas generated by the secondary three-phase separator is sent to the biogas storage tank through the biogas collection pipeline of the secondary three-phase separator. The two-stage three-phase separator biogas collection pipeline 7 and the gas-water separator 9 are connected to the biogas storage tank (not shown in the figure) correspondingly, and a water outlet weir plate 8 is correspondingly provided above the two-stage three-phase separator 6 .

The reactor of the utility model is divided into three reaction zones, namely the first reaction zone (high-load reaction zone), the second reaction zone (enhanced separation and precipitation zone), and the third reaction zone (clear water zone).

The first reaction zone is a high-load reaction zone. This part bears more than 80% of the pollutant removal capacity of the reactor of the utility model. The sludge concentration in this zone is high, the rising flow rate is large, the gas production is large, and the muddy water is mixed violently. The load can reach 4-8kgCOD/m3d. The bottom is equipped with a water distribution pipe and a circulating water pipe, and the top is a three-phase separator. The mixed liquid is lifted to the gas-water separator through the principle of air lift, and the separated liquid enters the circulating water pipe through the pipe for water distribution to realize internal circulation.

The second reaction zone is the enhanced separation and sedimentation zone. Due to the special design of the inverted cone and does not include the internal circulating water, the rising flow rate is rapidly reduced, which is conducive to the sedimentation of the separated sludge and returns to the lower layer. The top is the second stage. Three-phase separator, and collect the biogas to the biogas storage tank.

The third reaction zone is a clear water zone, which is mainly used to significantly reduce the suspended solids in the effluent of the reactor of the utility model.

D-UASB can be simply understood as two UASBs superimposed together. Due to the increase of the internal circulation system, no external power is needed, and the biogas generated by itself is used as the lifting power to realize the internal circulation of the mixed liquid. There is no need to set up a pump to force the circulation, which saves power consumption. Coupled with its larger height-to-diameter ratio, it has a higher load than traditional UASBs, and its volumetric load can reach 4-8kgCOD/m3d, which saves investment and occupies a small area.

The first reaction zone of the D-UASB reactor maintains a high water flow rate and produces most of the biogas. The mixing and stirring is vigorous, and the sludge bed in the reactor is in an expanded state. Under the condition of high hydraulic load, the sludge in the reactor It has good coagulation and sedimentation performance, high mechanical strength, can bear large organic load, and has relatively simple requirements for water distribution system.

The outlet of the circulating water pipe 2 is located below the primary three-phase separator 4 , and a baffle 12 is provided at the outlet of the circulating water pipe 2 . Baffles improve water distribution efficiency.

The primary three-phase separator 4 is fixed on the inner wall of the reactor tank 11 through the primary three-phase separator support ring 3, and the secondary three-phase separator 6 is fixed on the inner wall of the reactor tank 11 through the secondary three-phase separator support ring 13. The inner wall of the reactor tank 11. The internal structure of the utility model is fixed by the supporting ring 3 of the first-level three-phase separator and the supporting ring 13 of the second-level three-phase separator.

The reactor tank body 11 is provided with a variable diameter area 5, the diameter of the upper part of the variable diameter area 5 is greater than the diameter of the lower part, the first-stage three-phase separator 4 is arranged at the lower part of the variable diameter area 5, and the two The first-stage three-phase separator 6 is arranged on the upper part of the diameter reducing area 5 .

A transparent observation window 14 is provided on the side of the reactor tank body 11 . An emptying pipe 15 is provided at the bottom of the reactor tank 11 . Real-time observation of the internal operation of the reactor is carried out through the observation window, and the operation parameters are adjusted in time to prevent accidents. The emptying pipe is convenient for inspection and maintenance of the utility model. A leg 16 is correspondingly provided at the bottom of the reactor tank 11 , and the leg 16 is correspondingly connected with a roller 17 . The cooperation of the legs and the rollers can improve the convenience of the utility model.

The technical problem solved by the utility model is that in terms of the removal effect, the expansion rate of the sludge bed in the reactor of the utility model is increased, the water mixing effect is better, and the removal rate is greatly improved in a limited volume; Because of its double-layer three-phase separator design, larger height-to-diameter ratio and cone-mouth sedimentation zone design, the reactor solves the phenomenon of mud running in the UASB system. The reactor of the utility model has less suspended solids in the system effluent, And it can effectively guarantee the sludge content and microbial biomass of the system; because of the larger aspect ratio of the reactor of the utility model, there can be more sludge volume during operation, and the ability to resist impact load has been improved; The utility model reactor is also obviously superior to the traditional UASB from the perspective of engineering investment; it occupies a small area.

In the present utility model, the internal structure and principle of the three-phase separators in the first-stage three-phase separator 4 and the second-stage three-phase separator 6 are all known technologies, and will not be repeated here.

Although the technical solutions of the present utility model have been elaborated and enumerated in detail, it should be understood that for those skilled in the art, it is necessary for those skilled in the art to make modifications to the above-mentioned embodiments or adopt equivalent alternatives. It is obvious that these modifications or improvements made on the basis of not departing from the spirit of the utility model all belong to the protection scope of the utility model.

Claims (7)

1. a kind of efficient D-UASB reactor, comprise the reactor tank body (11) of hollow airtight cavity structure, it is characterized in that: the bottom of described reactor tank body (11) is provided with water inlet distribution pipe (1 ), the first-level three-phase separator (4) and the second-level three-phase separator (6) are also correspondingly provided in the reactor tank body (11), and the second-level three-phase separator (6) is located at the first-level The top of the three-phase separator (4); A gas-water separator (9) is correspondingly provided above the reactor tank body (11), and the first-level three-phase separator (4) is connected with the gas-water through the first-level three-phase separator biogas collection pipeline (10) The separator (9) is correspondingly communicated, and the bottom of the gas-water separator (9) is provided with a circulating water pipe (2), and the circulating water pipe (2) is correspondingly communicated with the reactor tank body (11); The secondary three-phase separator (6) is connected with the biogas collection pipeline (7) of the secondary three-phase separator correspondingly, and the biogas collection pipeline (7) and the gas-water separator (9) of the secondary three-phase separator are connected with each other. The biogas storage tanks are connected correspondingly, and a water outlet weir plate (8) is correspondingly provided above the secondary three-phase separator (6). 2. A kind of high-efficiency D-UASB reactor according to claim 1, is characterized in that: the outlet of described circulating water pipe (2) is positioned at the below of one-level three-phase separator (4), and in described circulation A baffle (12) is provided at the outlet of the water pipe (2). 3. A kind of efficient D-UASB reactor according to claim 1, is characterized in that: described one-level three-phase separator (4) is fixed on reactor by one-level three-phase separator support ring (3) The inner wall of the tank body (11), the secondary three-phase separator (6) is fixed to the inner wall of the reactor tank body (11) through the secondary three-phase separator support ring (13). 4. A kind of high-efficiency D-UASB reactor according to claim 1, is characterized in that: said reactor tank body (11) is provided with reducing area (5), and described reducing area (5) The diameter of the upper part is larger than the diameter of the lower part, the first-stage three-phase separator (4) is arranged at the lower part of the diameter-reducing area (5), and the second-stage three-phase separator (6) is arranged at the lower part of the diameter-reducing area (5). upper part. 5. A kind of efficient D-UASB reactor according to claim 1, is characterized in that: the side of described reactor tank body (11) is provided with transparent observation window (14). 6. A high-efficiency D-UASB reactor according to claim 1, characterized in that: an emptying pipe (15) is provided at the bottom of the reactor tank (11). 7. a kind of high-efficiency D-UASB reactor according to claim 1 is characterized in that: the bottom of described reactor tank (11) is correspondingly provided with leg (16), and described leg (16) and The corresponding connection of roller (17).