CN203498157U

CN203498157U - Improved up-flow anaerobic sludge bed (UASB) reactor

Info

Publication number: CN203498157U
Application number: CN201320492364.7U
Authority: CN
Inventors: 张向阳; 宋丽红; 孔进; 徐道卫; 徐少昌; 陈华东; 周海东; 张彦浩; 张扬; 郑德瑞
Original assignee: Shandong Fei Yang Genie Et Environnement; Shandong Jianzhu University
Current assignee: Shandong Fei Yang Genie Et Environnement; Shandong Jianzhu University
Priority date: 2013-08-13
Filing date: 2013-08-13
Publication date: 2014-03-26
Anticipated expiration: 2023-08-13

Abstract

The utility model provides an improved up-flow anaerobic sludge bed (UASB) reactor. The improved UASB reactor comprises a main body, wherein a reaction bed, a three-phase separator and an effluent weir are sequentially arranged in the main body from bottom to top; a water distribution pipe and a sludge discharging pipe are arranged at the bottom of the reaction bed; an effluent pipe is arranged on the effluent weir; a gas collecting chamber of the three-phase separator is connected with a gas collecting pipe; an inclined plate settlement layer is arranged between the three-phase separator and the effluent weir; a back-flushing pipe is arranged below the inclined plate settlement layer; a flushing fluid return pipe is connected between the effluent pipe and the water distribution pipe. According to the improved UASB reactor, sludge particles caused by load impact or bubble and water flow disturbance are effectively settled and retained when flowing up to the inclined plate settlement layer, the concentration of suspended matters in effluent is reduced, the water quality of the effluent is improved, and the subsequent treatment pressure of a structure is reduced; meanwhile, the loss of microorganisms can be reduced, the biomass of a reaction area is maintained, the treatment capacity and impact resistance of the reactor are improved, and the operation stability is improved.

Description

A kind of UASB reactor of improvement

Technical field

The utility model relates to a kind of UASB reactor (upflow anaerobic sludge blanket process) for anerobic sowage biological treatment, belongs to technical field of sewage.

Background technology

UASB reactor (being upflow anaerobic sludge blanket process) is a kind of reactor for anerobic sowage biological treatment.UASB reactor is simple with the biological content of height, high volumetric loading, equipment, move feature easily, is widely used in the processing of the high concentrated organic wastewaters such as chemical industry, papermaking, pharmacy, food.Traditional UASB reactor mainly forms by entering water distribution system, reaction bed, triphase separator, collection chamber and draining sludge drainage system, its structure as shown in Figure 1, in main body 1, be disposed with from bottom to top reaction bed 3, triphase separator 4 and effluent weir 7, the bottom of reaction bed 3 arranges water distributing pipe 2 and shore pipe 9, on overflow weir 7, set out water pipe 8, the collection chamber 5 of triphase separator 4 is connected with gas-collecting pipe 6; Sewage enters the bottom reaction bed 3 in main body 1 by the water distributing pipe 2 of bottom, water distributing pipe 2 is assigned to water inlet on the whole cross section of main body 1 bottom equably, and form up-flow, reaction bed 3 is sludge blanket, contain a large amount of anaerobions, be the nucleus that carries out biochemical reaction, according to the characteristic of mud, be divided into again the suspended sludge layer on bottom granule sludge layer and upper strata; Sewage fully mixes and contacts with the microorganism in mud, and microorganism, by the organic substance decomposing in water, produces biogas simultaneously and constantly emits, and the perturbation action that biogas produces makes sludge blanket top form suspended sludge layer; The triphase separator 4 on reaction bed 3 tops to collection chamber 5, is drawn the collecting methane producing by gas-collecting pipe 6, and collection and use in addition; Mud granule precipitates in the settling region of triphase separator 4, and is back to reaction bed 3 through the backflow seam of triphase separator 4; The processing water that the supernatant liquor that top produces is reactor, through behind the gap of triphase separator 4, enters receiving tank through overflow weir 7, finally by rising pipe 8, discharges.In addition, for the reasonable mud SRT in age that controls, keep microorganism active, also must be by regular, the quantitative spoil disposal of shore pipe 9.

In practice process, UASB reactor is usually subject to the impact of influent quality feature and operational management, anaerobic grain sludge characteristic is damaged or disintegrates, the content of sludge blanket suspended sludge obviously increases, add water yield fluctuation to the impact of system and produce the disturbance that biogas causes, particle suspended sludge less, that be difficult for precipitation is run off with water outlet, cause water outlet concentration of suspension high, affect the difficulty of its qualified discharge or increase subsequent technique cell processing.In document, also there is the report of problems, and propose simple solution, as increased traverse baffle in settling region to improve the settlement action of settling region mud.

As everyone knows, swash plate or tube settler be take shallow pool theory as basis, are widely used in to water treatment, advanced treatment of wastewater field, and its advantage is that sedimentation function is good, and floor space is little.Even, after increasing suitable back flushing facility, swash plate or tube settler also can be used in sewage second-level treatment process.But at present, swash plate or Inclined-tube Settling Technology are not still applied improving aspect UASB reactor outlet effect.

Summary of the invention

For traditional UASB reactor, in application, there is the higher problem of delivery turbidity that the water yield and load impact cause, the UASB reactor of the improvement that the utility model provides that a kind for the treatment of effect is good, resistance to overload shock ability is strong, the concentration of suspension stability low, effluent quality in water outlet is high, so that water outlet can qualified discharge or can be alleviated the burden of subsequent disposal.

The UASB reactor of improvement of the present utility model, by the following technical solutions:

This reactor, comprises main body, is disposed with from bottom to top reaction bed, triphase separator and effluent weir in main body, and the bottom of reaction bed arranges water distributing pipe and shore pipe, sets out water pipe on effluent weir, and the collection chamber of triphase separator is connected with gas-collecting pipe; Between triphase separator and effluent weir, be provided with sloping plate deposition layer, sloping plate deposition layer below is provided with backwash tube, is connected with washing fluid return line between rising pipe and water distributing pipe.

Between backwash tube and gas-collecting pipe, be connected with air entraining pipe.

Sloping plate deposition layer is arranged and is formed by the swash plate being obliquely installed.The level inclination of swash plate is 60 °, and the spacing between swash plate and swash plate is 80-100mm, and swash plate plagioclase is 1.0-1.2m.

The utility model by setting up sloping plate deposition layer in traditional UASB reactor, the beneficial effect playing is mainly reflected in: in UASB reactor operational process, because of load impact or bubble, current disturbance and the mud granule taken out of, at up-flow during to sloping plate deposition layer, effectively precipitated and held back, after separated with clear water, return to reaction bed, so can reduce concentration of suspension in water outlet, improve effluent quality, reduce the pressure of subsequent disposal structures, also can reduce the loss of microorganism simultaneously, maintain the biomass of reaction zone, improve processing power and the impact resistance of reactor, strengthen operation stability.In addition, the biogas of collecting can part be originated for sloping plate deposition layer backwash gas, without the extra back flushing source of the gas that increases.

Accompanying drawing explanation

Fig. 1 is the structural representation of traditional UASB reactor.

Fig. 2 is the structural representation of the UASB reactor of the utility model improvement.

Wherein: 1, main body, 2, water distributing pipe, 3, reaction bed, 4, triphase separator, 5, collection chamber, 6, gas-collecting pipe, 7, overflow weir, 8, rising pipe, 9, shore pipe, 10, washing fluid return line, 11, air entraining pipe, 12, backwash tube, 13, sloping plate deposition layer.

Embodiment

The utility model is the further improvement to traditional UASB reactor, its structure as shown in Figure 2, also comprise main body 1 the same as traditional UASB reactor, in main body 1, be disposed with from bottom to top reaction bed 3, triphase separator 4 and effluent weir 7, the bottom of reaction bed 3 arranges water distributing pipe 2 and shore pipe 9, on effluent weir 7, set out water pipe 8, the collection chamber 5 of triphase separator 4 is connected with gas-collecting pipe 6.And traditional UASB reactor difference is that the utility model is provided with sloping plate deposition layer 13 between triphase separator 4 and effluent weir 7, sloping plate deposition layer 13 below are provided with backwash tube 12, between backwash tube 12 and gas-collecting pipe 6, be connected with air entraining pipe 11, between rising pipe 8 and water distributing pipe 2, be connected with washing fluid return line 10.In rising pipe 8, air-supply duct 11 and washing fluid return line 10, be equipped with control valve.

Sloping plate deposition layer 13 is located at below the liquid level of triphase separator 4 tops, the many groups of swash plates that are obliquely installed, consists of.More satisfactory ground, the clear distance between swash plate and swash plate is between 80mm-100mm, and level inclination is 60 °, and the plagioclase of swash plate is between 1.0m-1.2m; The material of plate can be selected the plastic plates such as PVC, polypropylene, also can adopt cement plate, woodboard, glass epoxy etc. to be made.Whole sloping plate deposition layer 13 can be fixed by support, should avoid bearing and on swash plate, bear concentrated loads in installation and operation process.Suspended sludge particle climbs in process in the gap between adjacent swash plate with current; because density is larger, start to fall; go with current back of the body road; the swash plate being arranged by below after the certain distance of whereabouts is held back; when the particle of holding back on swash plate runs up to a certain degree; just automatically glide, finally return to the beds of precipitation, so just reach the suspended particle effect separated with clear water.

For preventing that growing microbial film in the gap between swash plate causes the beds of precipitation to stop up, at sloping plate deposition layer 13 arranged beneath backwash tube 12, backwash tube 12 adopts perforated pipe gas back-flushing, comparatively ideal perforation spacings is 10mm, aperture is between 2-4mm, can produce like this bubble that size is suitable, density of such perforation evenly arranges, so that whole swash plate layer backwash effect is even.While carrying out back flushing, close the control valve on rising pipe 8, the biogas that collection chamber 5 is collected is through the appropriate backwash tube 12 of introducing of air entraining pipe 11, by the shearing action of Bubble formation, microbial film between swash plate gap is rinsed to cause and come off, to reach the object of flushing, the washing fluid producing after back flushing is reintroduced back to reactor bottom through washing fluid return line 10 through water distributing pipe 2, can avoid so a large amount of suspended particles in washing fluid to flow out with water outlet.

Sewage, and fully contacts with reaction zone microorganism through water distributing pipe 2 uniformly distributings on reaction bed 3, the organism in sewage is effectively decomposed, and produce biogas.Triphase separator 4 carries out the biogas of sludge creation and processing water separated, and mud is returned to reaction bed 3, and the biogas of generation is collected by collection chamber 5.Processed water before discharging reactor by overflow weir 7, through sloping plate deposition layer 13, suspended substance wherein is further removed.

The utility model to the essence of UASB reactor improvement is, by increasing sloping plate deposition layer 13, the suspended particle that may take out of in water outlet again precipitated, held back, and reduces water outlet concentration of suspension, improves outlet effect, alleviates follow-up structures processing load.Meanwhile, can also maintain biomass in reactor, improve reactor for treatment ability and operation stability, increase anti-load impact ability.In addition, the part using the beds of precipitation as UASB reactor, without establishing separately settling tank, can also reduce system floor space again.

Claims

1. the UASB reactor of an improvement, comprise main body, be disposed with from bottom to top reaction bed, triphase separator and effluent weir in main body, the bottom of reaction bed arranges water distributing pipe and shore pipe, on effluent weir, set out water pipe, the collection chamber of triphase separator is connected with gas-collecting pipe; It is characterized in that: between triphase separator and effluent weir, be provided with sloping plate deposition layer, sloping plate deposition layer below is provided with backwash tube, is connected with washing fluid return line between rising pipe and water distributing pipe.

2. the UASB reactor of improvement according to claim 1, is characterized in that: between described backwash tube and gas-collecting pipe, be connected with air entraining pipe.

3. the UASB reactor of improvement according to claim 1, is characterized in that: described sloping plate deposition layer is arranged and formed by the swash plate being obliquely installed.

4. the UASB reactor of improvement according to claim 3, is characterized in that: the level inclination of described swash plate is 60 °.

5. the UASB reactor of improvement according to claim 3, is characterized in that: the spacing between described swash plate and swash plate is 80 mm-100mm, and swash plate plagioclase is 1.0m-1.2m.