CN205873993U

CN205873993U - Counter -current biological filter under leading aeration

Info

Publication number: CN205873993U
Application number: CN201620728225.3U
Authority: CN
Inventors: 雷培树; 陈才高; 李树苑; 苏新; 刘海燕; 李露; 张小平
Original assignee: Central and Southern China Municipal Engineering Design and Research Institute Co Ltd
Current assignee: Central and Southern China Municipal Engineering Design and Research Institute Co Ltd
Priority date: 2016-07-12
Filing date: 2016-07-12
Publication date: 2017-01-11
Anticipated expiration: 2026-07-12

Abstract

The utility model discloses a counter -current biological filter under leading aeration. Counter -current biological filter under leading aeration includes mutual independence and adjacent leading aeration district and lower counter -current filtering area, and aeration equipment is only installed in distinguishing to leading aeration, and lower counter -current filtering area is provided with water distribution drainage channel, filter layer, supporting layer, the water distribution distribution layer of catchmenting. Intake through leading aeration district back, enter into down the counter -current filtering area through adjustable inlet valve from upper portion in, rivers are from last to down through the filter layer, from the outlet pipe outflow. The utility model discloses li baoqiqu separates with the filtering area for aeration equipment is installation and maintenance easily, and the filtration mode of counter -current under the filtering area adopts goes out the aquatic in the time of can solving air water upward flow filtering pond operation simultaneously and carries biomembrane and foam, dissolved oxygen and the high problem of suspended solid concentration that comes off secretly, gets rid of pollutants such as organics in water, ammonia nitrogen, total nitrogen and suspended solid better, and it is better that the messenger draws water quality of water.

Description

A kind of preposition aeration Downward-flow biofilter

Technical field

This utility model relates to a kind of BAF removing the pollutant such as Organic substance in water, ammonia nitrogen, total nitrogen, specifically For a kind of preposition aeration Downward-flow biofilter.

Background technology

The aerating system of existing BAF, in filter material layer, need to clean out the filtrate in pond during maintenance, time-consuming Arduously, operation inconvenience；In aerating system makes filter tank simultaneously, aqueous vapor flows up so that be entrained with the biomembrane come off in water outlet And dissolved oxygen in foam, and water outlet and concentration of suspension high, water quality inferiority.

Summary of the invention

For solving problem above, this utility model provides the biofilter that a kind of aeration zone separates with filtering area so that The construction of biofilter and easy to maintenanceization, effluent quality is high.

This utility model is by the following technical solutions: a kind of preposition aeration Downward-flow biofilter, it is characterised in that: described Biofilter by preposition aeration zone and lower to stream filtering area form, described preposition aeration zone with lower to flow filtering area be two adjacent Compartment；In described preposition aeration zone, aerator is installed；Described lower to stream filtering area be internally provided with defecator.

Described preposition aeration zone exterior bottom is provided with water inlet pipe；Described lower to stream filtering area exterior bottom, water outlet is installed Pipe；Described preposition aeration zone and lower interlayer top between stream filtering area are provided with scalable inlet valve；Described lower to stream Filtering area upper inside wall is provided with water distribution drainage ditch.

It is provided with water intaking valve on described water inlet pipe, described outlet pipe is provided with scalable outlet valve.

Described lower to stream side, filtering area gas and water back purge system is installed.

Described gas and water back purge system includes backwash trachea, drain pipe, backwash water pipe, blow-down pipe；Described backwash Trachea is provided with backwash air valve, drain pipe is provided with drain valve, backwash water pipe is provided with backwash water valve, blow-down pipe is provided with Atmospheric valve.

Described lower to stream filtering area within defecator be followed successively by filter material layer, supporting layer, filter from top to bottom.

For the water and air distributing layer that catchments below described filter.

The beneficial effects of the utility model are: preposition aeration Downward-flow biofilter avoids general biofilter aeration dress It is placed in filter course, during aerator maintenance, the trouble of filtrate need to be understood, filter tank described in the utility model aerator installs, Easy to maintenance；Water inlet through preposition aeration zone simultaneously is from top to bottom through the filter course of filtering area, and effluent quality is good, relatively by Under supreme filter type, the impurity that can preferably stop to bubble through the water column is taken out of by gas and current and is caused asking of condition of water quality difference Topic；It addition, the lower gas and water back purge system arranged to stream filtering area can remove the trapped substance in filtering layer well so that filtrate Regeneration, it is ensured that the filter effect in filter tank.

Accompanying drawing explanation

Fig. 1: preposition aeration Downward-flow biofilter organigram

As shown in the figure: preposition aeration zone 1；Lower to stream filtering area 2；Water inlet pipe 1-1；Water intaking valve 1-2；Air hose 1-3；Aeration Device 1-4；Scalable inlet valve 1-5；Water distribution drainage ditch 2-1；Filter material layer 2-2；Supporting layer 2-3；Filter 2-4；Catchment water distribution Distribution layer 2-5；Backwash trachea 2-6；Backwash air valve 2-7；Drain pipe 2-8；Drain valve 2-9；Backwash water valve 2-10；Recoil Wash water pipe 2-11；Scalable outlet valve 2-12；Outlet pipe 2-13；Blow-down pipe 2-14；Atmospheric valve 2-15.

Detailed description of the invention

In conjunction with Fig. 1, utility model is further described.

Water treatment procedure: close gas and water back purge system, pending water is entered preposition aeration zone 1 by water inlet pipe 1-1, exposes Device of air 1-4 makes into water aeration, and the water reaching certain dissolved oxygen concentration is flowed into water distribution row by scalable inlet valve 1-5 Water channel 2-1, water distribution drainage ditch 2-1 are by water uniform water distribution to filter course, and current first pass through filter material layer 2-2 from top to bottom and carry out nitrification With denitrification, remove organic pollutants, ammonia nitrogen and total nitrogen and float, then through supporting layer 2-3, filter 2-4 to catchmenting Water and air distributing layer 2-5, discharges finally by outlet pipe 2-13.

Backwash cleaning process: first close water intaking valve 1-1, scalable inlet gate 1-5, scalable outlet valve 2-12, anti- Rinse water valve 2-10, opening water discharge valve 2-9；It is then turned on backwash air valve 2-8, accesses air and filter material layer is carried out air recoil Wash；Then open backwash water valve 2-10, access backwashing water by backwash water pipe 2-11 and filter material layer is carried out air and water Backwash, backwashing wastewater is entered water distribution drainage ditch 2-1 and is discharged by drain pipe 2-7；Turn off source of the gas and backwash air valve 2- 8, filter material layer is only carried out water backwashing, discharges through drain pipe 2-7, backwash terminates, it is ensured that biofilter filtering efficiency.

The mode that this utility model utilizes aeration zone to separate with filtering area not only makes the construction of whole biofilter and maintenance Simplifying, the lower filtered water inlet mode to stream also makes effluent quality more preferable, and the gas and water back purge system simultaneously configured can be effective Clean biometric filter tank, it is ensured that biofilter Operating ettectiveness.

The foregoing is only preferred embodiment of the present utility model, all done within principle of the present utility model any Simple modification, equivalents and remodeling, within must belonging to protection domain of the present utility model.

Claims

1. a preposition aeration Downward-flow biofilter, it is characterised in that: described biofilter by preposition aeration zone (1) and lower to Stream filtering area (2) composition, described preposition aeration zone (1) with lower to flow filtering area (2) be two adjacent compartments；Described preposition exposure Aerator (1-4) is installed in gas district (1)；Described lower to stream filtering area (2) be internally provided with defecator.

Preposition aeration Downward-flow biofilter the most according to claim 1, it is characterised in that: described preposition aeration zone (1) Exterior bottom is provided with water inlet pipe (1-1)；Described lower to stream filtering area (2) exterior bottom outlet pipe (2-13) is installed；Described Preposition aeration zone (1) and lower interlayer top between stream filtering area (2) are provided with scalable inlet valve (1-5)；Under described It is provided with water distribution drainage ditch (2-1) to stream filtering area (2) upper inside wall.

Preposition aeration Downward-flow biofilter the most according to claim 2, it is characterised in that: on described water inlet pipe (1-1) It is provided with water intaking valve (1-2), described outlet pipe (2-13) is provided with scalable outlet valve (2-12).

Preposition aeration Downward-flow biofilter the most according to claim 1, it is characterised in that: described lower to stream filtering area (2) side is provided with gas and water back purge system.

Preposition aeration Downward-flow biofilter the most according to claim 4, it is characterised in that: described gas and water backwash fills Put and include backwash trachea (2-6), drain pipe (2-7), backwash water pipe (2-11), blow-down pipe (2-14)；Described backwash gas (2-6) is provided with backwash air valve (2-8) to pipe, drain pipe (2-7) is provided with drain valve (2-9), set on backwash water pipe (2-11) Backwash water valve (2-10), blow-down pipe (2-14) is had to be provided with atmospheric valve (2-15).

Preposition aeration Downward-flow biofilter the most according to claim 1, it is characterised in that: described lower to stream filtering area (2) internal defecator is followed successively by filter material layer (2-2), supporting layer (2-3), filter (2-4) from top to bottom.

Preposition aeration Downward-flow biofilter the most according to claim 6, it is characterised in that: described filter (2-4) lower section For the water and air distributing layer (2-5) that catchments.