CN100457649C - Static pressure type device for decanting water - Google Patents

Abstract

The present invention relates to a static pressure type water-decanting equipment, it is formed from water-decanting weir tank (containg water counter weight zone), mechanical linkage, bearing seat, pneumatic system and control system, etc. Said invention utilizes the working intermission of air-blower for aeration or air compressor to supply air to water-decanting equipment, and drive and control the water-decanting equipment work so as to implement water discharge work of SBR system. Said invention is applicable to urban deomestic sewage treatment engineering and various industrial waste water treatment engineerings.

Description

Static pressure type device for decanting water

Technical field

The present invention relates to the hydrophone of straining of a kind of waste disposal plant, particularly a kind of static pressure type.

Background technology

Straining hydrophone is a kind of top-down displacement type water-freeing arrangement in the engineering of water treatment, and it is particularly important to seem in SBR technology, is the core equipment of this technology.The SBR system process: the SBR method is the abbreviation of sequencing batch active sludge Sewage treatment systems, and whole technological process comprises five stages, is followed successively by: water inlet, aeration, precipitation, draining and idle stage.These five stages all finish in the aeration tank, begin to begin to be called one-period from water inlet for the first time to water inlet for the second time, in each work period, the working time in each stage, running status can be adjusted according to sewage character, discharging rule and water outlet requirement etc.

The SBR system is existing strains hydrophone and generally is made up of water collector, water-freeing arrangement and power set, and mainly contain several forms: pontoon type decanting device, siphonic decant device, mechanical type are strained hydrophone etc.

Pontoon type decanting device advantage is that simple structure, cost are low, and shortcoming is that hydathode is positioned under the liquid level all the time, deposition easily, and to have corresponding electrically operated valve supporting with it.Siphonic decant device advantage is stable, easily maintenance, and cost is low, and shortcoming is that the drainage point is low.It is that draining is steady, effluent quality good that mechanical type is strained the hydrophone advantage; Shortcoming is a complex structure, and equipment is various, and power consumption is big, and cost is higher.

Summary of the invention

The objective of the invention is to propose a kind of static pressure type device for decanting water, static pressure type device for decanting water mainly solves: it is big, stable to strain the hydrophone power consumption, complex structure, problem such as mechanical means is various.Changed the mode of operation that tradition is strained hydrophone, have stable, strain big, the characteristics such as energy consumption is low, level of automation height of water load, be applicable to small and medium cities sanitary sewage disposal engineering and all types of industries waste water treatment engineering in the SBR system.

The objective of the invention is to be achieved through the following technical solutions:

Static pressure type device for decanting water, by moisture weighted areas strain mill weir groove, water shoot connecting rod, air turnover tracheae connecting rod, water shoot bearing support, inlet pipe bearing support, pneumatic system is formed, described water shoot connecting rod is connected with the water shoot bearing support, air turnover tracheae connecting rod is connected with the inlet pipe bearing support, strain the mill weir groove on the water surface of sbr reactor pond, water shoot connecting rod, air turnover tracheae connecting rod, water shoot bearing support, inlet pipe bearing support are in the underwater; Aerating system is connected the reaction tank bottom.

Aforesaid static pressure type device for decanting water, the rotating part of its water shoot connecting rod and air turnover tracheae connecting rod is connected by mechanical seal with rotating part not.

Aforesaid static pressure type device for decanting water, the medullary ray of its water shoot bearing support and inlet pipe bearing support is vertical with the SBR pond water surface, every error of meter＜1.5mm.

Advantage of the present invention and effect are:

1. equipment choosing advanced person's moving switch and safety alarm device have bigger handiness and adjustability in operational process, to adapt to the variation of water quality, the water yield.The auto stop that meets with an accidet is reported to the police, and can realize the fully automatic operation management.

2. static pressure type device for decanting water operates in the best crest of weir load range, and the medullary ray of system design inlet pipe bearing support and water shoot bearing support is vertical with the SBR pond water surface, every error of meter＜1.5mm, to guarantee the overflow weir load evenly, current are steady, and not disturbance sludge blanket guarantees effluent quality.Strain water depth and can reach 2.6m, strain the water yield 50～2000m ³/ h is applicable to sanitary sewage disposal of various large-and-medium size cities and all types of industries wastewater treatment.Product line is complete, can satisfy user's needs to greatest extent.

3. facility investment is few, and working cost is low.Major equipment can split into several parts, is convenient to transport safely, and is convenient for installation and maintenance.

4. device control precision height, the draining stable and uniform, stable working, easy to operate, can realize many in a pond and use.Rotating shaft is rotated flexibly, and compact overall structure is in light weight, saves power.Equipment strains that water load is big, energy consumption is low, level of automation is high, has reduced mechanical means, and is simple in structure, is convenient to combine with the control mode of SBR system.Rotating bearing adopts automatic fine tuning device, and the built-up type underwater sealing appliance ensure sealing of particular design is reliable.

5. static pressure type device for decanting water combines multiple advantages of straining hydrophone such as traditional Float cylinder type, rotary and arc weir formula, fundamentally changed the mode of operation that tradition is strained hydrophone, promptly the work of gas blower of being used by aeration or air compressor machine is intermittently to straining the hydrophone air feed, and hydrophone work is strained in promotion and control, finish the work of SBR system bleeding stage, the water-out manners of traditional SBR system is become the static pressure type water outlet.

Description of drawings

Fig. 1 is the static pressure type device for decanting water structure iron;

Fig. 2 is a static pressure type device for decanting water working stage synoptic diagram.

Nomenclature among the figure

1.SBR reaction tank 2. water shoot bearing supports

3. inlet pipe bearing support 4. water shoot connecting rods

5. air turnover tracheae connecting rod 6. is strained the mill weir groove

7. support 8. contains the inlet system of air pump

9. motorized valve 10. aerating systems

11. water weighted areas

Embodiment

Static pressure type device for decanting water strain mill weir groove (6) on the water surface of sbr reactor pond (1), water shoot connecting rod (4), turnover blast main connecting rod (5), water shoot bearing support (2), inlet pipe bearing support (3) etc. are in the underwater.Strain mill weir groove (6) and work the effect of catchmenting, operational process must be steadily, and even thereby the assurance overflow weir is loaded, clear water is cast aside into straining mill weir groove (6) from the pond surface layer of water.Linkage assembly guarantees to strain mill weir groove (6) parallel motion, and linkage assembly comprises water shoot bearing support (2) and inlet pipe bearing support (3), and the rotating part of connecting rod is connected by mechanical seal with rotating part not.Support (7) is used for supporting, fixedly strains hydrophone.

Principle of work:

According to the SBR treatment process, when straining the water end, to strain the air pump of hydrophone and start working, pressurized air enters to be strained mill weir groove (6) and makes it be increased to sbr reactor pond (1) water surface, and overflow weir also is increased to more than the water surface with straining mill weir groove (6), stops to strain water.Simultaneously, strain mill weir groove (6) contains air pump when internal pressure reaches set(ting)value inlet system (8) and quit work, SBR begins to enter the idle stage.Aeration phase end when aerating system (10), when the SBR processing requirement is strained water, straining the motorized valve (9) of hydrophone opens, straining mill weir groove (6) descends, overflow weir is also reduced to below the water surface, begin to strain water,, make and strain the water yield of straining that hydrophone reaches processing requirement by adjusting the counterweight water yield of water weighted areas (11).Simultaneously, the pressurized air of straining in the mill weir groove (6) is discharged from water shoot.When the water level in SBR pond reaches the lowest water level of processing requirement, straining the motorized valve (9) of hydrophone closes, the inlet system (8) that contains air pump is started working, pressurized air enters to strain mill weir groove (6) and will strain mill weir groove (6) and lifts from water, overflow weir rises to more than the water surface, stops to strain water, and SBR enters the idle stage again, so circulate, finish the drainage works of SBR technology.

Strain the mill weir groove on the water surface of sbr reactor pond, water shoot, turnover tracheae, bearing support etc. are in the underwater.

Strain the mill weir groove and work the effect of catchmenting, operational process must be steadily, and even thereby the assurance overflow weir is loaded, clear water is cast aside into weir notch from the pond surface layer of water.Connecting rod (four connecting rods) mechanism guarantees the weir notch parallel motion, and linkage assembly comprises water shoot and inlet pipe, and the rotating part of connecting rod is connected by mechanical seal with rotating part not.

Strain the water yield:

Straining the water yield determines according to form of straining the water system overflow weir and total length thereof.According to H-SBR technology and the requirement of straining the water yield, overflow weir can adopt and flood aperture, triangle sawtooth weir and sharp crested weir etc., and the flow rate calculation formula on various weirs is as follows:

A, single aperture flow: $q=0.62\mathrm{\ω}\sqrt{2\mathrm{gh}}(m^3/s)$

B, unit length sharp crested weir flow: $q=m\sqrt{2g}{h}^{1.5}(m^3/s)$

C, one 90 ° triangle crest of weir flow: q=1.4h ^2.5(m ³/ s)

Wherein:

ω-orifice area (m ²)

The g-gravity constant, 9.81 (m ²/ s)

Head on center, h-aperture or the crest of weir (m)

Strain water yield Q=q * B

In the formula, B-overflow weir length overall (crest of weir quantity).

Power floats:

After determining to strain the water yield, the calculating of straining the unsteady power of hydrophone is the key of complete assembly design.

Counterweight water yield Q=f ₂-m

Wherein:

f ₂-weir notch is being strained the increase buoyancy that volume of displacement produced under the water depth

M-strains the weight of mill weir groove and air inlet, draining connecting rod

Increase the counterweight water yield, straining the water yield just increases, and promptly the weir notch stroke strengthens;

Reduce the counterweight water yield, strain the water yield and just reduce, promptly the weir notch stroke reduces.

The counterweight water yield is floated within the specific limits, promptly fluctuates in straining mill weir groove design loading scope.As specification is the hydrophone of straining of 100t/h, and the actual water yield of straining is 85t～115t/h.

Air pressure P=(m-f ₃-f ₁)/S

Wherein:

f ₁-air inlet, draining connecting rod arrange the buoyancy that volume produced of water

f ₃-weir notch rises to the water surface above (stopping to strain water) and arranges buoyancy of water

When S-stopped to strain water, the air capacity of the floorage of weir notch upper cover plate and overflow weir inner headed face product moment air pump determined that according to straining the water time process time, required air quantity was big in short-term, otherwise flow is little.

Static pressure type device for decanting water has reliable in action, strains big, the characteristics such as energy consumption is low, level of automation height of water load, reduced mechanical means simultaneously, be convenient to combine with the control mode of SBR technology, the work that utilizes blast apparatus is finished the work in SBR process drain stage intermittently to straining the hydrophone air feed.Strain mill weir groove (6) and work the effect of catchmenting, operational process must be steadily, and even thereby the assurance overflow weir is loaded, clear water is cast aside into straining mill weir groove (6) from the pond surface layer of water.

The static pressure type device for decanting water integral material adopts stainless steel, good corrosion resistance, and long service life is suitable for various condition of water quality, the operating reliability height.

Claims (3)

1. static pressure type device for decanting water, it is characterized in that straining mill weir groove (6) by moisture weighted areas, water shoot connecting rod (4), air turnover tracheae connecting rod (5), water shoot bearing support (2), blast main bearing support (3), pneumatic system is formed, described water shoot connecting rod (4) is connected with water shoot bearing support (2), air turnover tracheae connecting rod (5) is connected with blast main bearing support (3), strain mill weir groove (6) on the water surface of sbr reactor pond (1), water shoot connecting rod (4), air turnover tracheae connecting rod (5), water shoot bearing support (2), blast main bearing support (3) is in the underwater; Aerating system is connected the reaction tank bottom.

2. static pressure type device for decanting water according to claim 1 is characterized in that the rotating part of water shoot connecting rod (4) and air turnover tracheae connecting rod (5) is connected by mechanical seal with rotating part not.

3. static pressure type device for decanting water as claimed in claim 1 is characterized in that the medullary ray of water shoot bearing support (2) and blast main bearing support (3) is vertical with the SBR pond water surface, every error of meter＜1.5mm.

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