CN207294524U

CN207294524U - A kind of landfill leachate film processing system

Info

Publication number: CN207294524U
Application number: CN201721216377.6U
Authority: CN
Inventors: 黄芳; 杨素; 苏谋; 于友明
Original assignee: Sichuan Shue Yan Environmental Technology Co Ltd
Current assignee: Sichuan Shue Yan Environmental Technology Co Ltd
Priority date: 2017-09-21
Filing date: 2017-09-21
Publication date: 2018-05-01
Anticipated expiration: 2027-09-21

Abstract

The utility model discloses a kind of landfill leachate film processing system, including collecting pit, concrete sedimentation basin, anaeration in normal temperature pond, A/O MBR, sludge concentration tank, sludge filter press, DTNF/DTRO film filters, multi-effect evaporator and methane boiler, the system adds methane boiler and multi-effect evaporator on the basis of existing technology, and it instead of original rolling NF/RO film filters using DTNF/DTRO film filters, whole system is more environmentally-friendly, contamination resistance is strong, rate of recovery higher, can accomplish wastewater zero discharge.

Description

A kind of landfill leachate film processing system

Technical field

The utility model belongs to field of garbage disposal, is to be related to a kind of landfill leachate film processing system specifically.

Background technology

Landfill leachate refers to rubbish in stacking process is filled, due to anaerobic fermentation, organic matter decompose, the leaching of precipitation With wash away, the reason such as surface water and groundwater immersion, produce a variety of metabolites and moisture, form containing high concentration suspended matter and The liquid of high concentration organic or inorganic component.Landfill leachate water quality characteristic is mainly：（1）The high component of organic pollution concentration is answered It is miscellaneous；（2）Change of water quality is big；（3）Contain certain metal ion；（4）Ammonia-nitrogen content is high；（5）Biodegradability is poor（During with landfill Between, biodegradability is more and more lower）；（7）Electrical conductivity is high, salt content is high.With the increase of China's city numbers and the increasing of population More, municipal refuse yield is in the trend risen year by year.According to statistics, the rubbish produced every year has reached 1.5 hundred million tons, it is average with The speed in 9%/year increases, wherein undressed rubbish is 7,000,000,000 tons existing, accounts for the 8.3% of China soil sum.It is expected that in future 20 years in, the discharge capacity of solid waste by occupy 85% land, all there are serious refuse pollution to ask for national most area Topic.The process problem of resulting landfill leachate becomes one of important topic of the world today.

The country's typical treatment process of landfill leachate is anaerobism+aerobic+UF membrane at present, its processing system such as Fig. 1 institutes Show, there are following defect for the system：

1）Rolling NF/RO resistance tocrockings are poor

Due to the complexity of leachate quality, general bio-chemical effluent COD is in 1000mg/L or so.Rolling NF/RO antipollutions Property it is poor, generally require influent COD to be less than 100mg/L, special resistance tocrocking rolling NF/RO water inlets also require to be less than 200mg/L. The COD of landfill leachate is well beyond the degree that rolling NF/RO is resistant to.

2）System stability is poor

Since Landfill Leachate Pollution thing concentration is too high, cause biochemical system stability poor.And biochemical system easily by Influenced to extraneous factor, particularly anaerobic system is to very temperature sensitive.In winter particularly northern area biochemical system water outlet Water quality is worse, and bio-chemical effluent COD is easier to cause film often beyond 1000mg/L, even up to 2000mg/L, so high COD Pollution.

3）On concentrated water recharge problem

Since the rate of recovery of rolling NF/RO is low, less than 60%, rolling NF causes to need the general rolling RO rate of recovery less than 70% Want the water of recharge very big.The recharge of concentrated water can pollute the continuous enrichment of thing, particularly salinity, because whole system is to nothing Machine salt is only to concentrate, without any removal scheme.

Utility model content

The purpose of this utility model is that to solve the above-mentioned problems and provides a kind of landfill leachate film processing system.

The utility model is achieved through the following technical solutions above-mentioned purpose：

A kind of landfill leachate film processing system, including collecting pit, concrete sedimentation basin, anaeration in normal temperature pond, A/O-MBR, Sludge concentration tank, sludge filter press, DTNF/DTRO film filters, multi-effect evaporator and methane boiler；

Wherein described DTNF/DTRO film filters are provided with an inlet being connected with the A/O-MBR, a company It is connected to the outlet of multi-effect evaporator concentrated water, a discharge outlet up to standard；

The multi-effect evaporator be provided with a concentrated water import being connected with the DTNF/DTRO film filters, one Condensate drain outlet, a residue remove mouth, a steam inlet；

The methane boiler be provided with for be connected with the methane outlet in the anaeration in normal temperature pond biogas entrance, for The steam (vapor) outlet of the steam inlet connection of the multi-effect evaporator.

Specifically, the A/O-MBR is aerobic/anaerobic membrane bioreactor.

Specifically, the filter core of the DTNF/DTRO film filters employs DTNF films and DTRO films at the same time.

As a kind of technical solution of this patent selection, the filtrate (liquid of the sludge concentration tank and the sludge filter press Connected with the collecting pit.

Compared with prior art, the utility model has the advantages that：

The utility model adds methane boiler and multi-effect evaporator on the basis of existing system, and utilizes DTNF/ DTRO film filters instead of original rolling NF/RO film filters, and whole system is more environmentally-friendly, and contamination resistance is strong, Rate of recovery higher, can accomplish wastewater zero discharge.

Brief description of the drawings

Fig. 1 is the structural schematic block diagram of traditional garbage percolation liquid treating system；

Fig. 2 is the structural schematic block diagram of landfill leachate film processing system described in the utility model.

Embodiment

The utility model is described in further detail below in conjunction with the accompanying drawings：

With reference to shown in Fig. 2, the utility model includes collecting pit, concrete sedimentation basin, anaeration in normal temperature pond, A/O-MBR, sludge Concentration basin, sludge filter press, DTNF/DTRO film filters, multi-effect evaporator and methane boiler；

Wherein DTNF/DTRO film filters are provided with an inlet being connected with A/O-MBR, one and multiple-effect evaporation The concentrated water outlet of device connection, a discharge outlet up to standard；

Multi-effect evaporator is provided with a concentrated water import being connected with DTNF/DTRO film filters, a condensed water row Put mouth, a residue removes mouth, a steam inlet；

Methane boiler be provided with for be connected with the methane outlet in anaeration in normal temperature pond biogas entrance, be used for and multiple-effect evaporation The steam (vapor) outlet of the steam inlet connection of device.

Wherein A/O-MBR is aerobic/anaerobic membrane bioreactor, and the filter core of DTNF/DTRO film filters uses at the same time DTNF films and DTRO films, are dish tubular membrane, i.e., instead of the rolled film in traditional filtering device with dish tubular membrane.

As a kind of technical solution of this patent selection, the filtrate (liquid of sludge concentration tank and sludge filter press with collection Pond connects, and filtrate returns in collecting pit and can be handled again.

The operation principle of the utility model is as follows：

The PAC added to coagulative precipitation tank refers to inorganic salt coagulant, is aluminium polychloride；PAM refers to nonionic Type high polymer coagulant, molecular weight 1,500,000-900 ten thousand, commodity concentration is generally 8%.The effect of PAC is by it or it water The effect completion of four aspects such as bridging is caught and is adsorbed in the compression double electric layer of solution product, electrically neutralization, winding net, can quilt It is oxidizing to cause the particulate matter of COD to precipitate to filter out, so as to reduce COD.And PAM is high score flocculant, have Machine high polymer coagulant has the resulting huge adsorption effect of the flco that bigger is formed between particle.

The biogas discharged from medium temperature anaerobic pond enters the burning Indoor Combustion of methane boiler, and without directly in an atmosphere Then, more environmentally-friendly, the steam come out from methane boiler, which enters in multi-effect evaporator, to be condensed.

High efficiency filter is carried out from the liquid that A/O-MBR comes out by DTNF/DTRO film filters, it is dense in filtration apparatus Water, which enters in multi-effect evaporator, to be evaporated, and the condensed water of multi-effect evaporator is from condensate drain outlet qualified discharge, and residue is then from residual Slag removes mouth and removes and fill.

As depicted in figs. 1 and 2, landfill leachate film processing system described in the utility model uses high pressure resistant and anti-high pollution The strong DTNF and DTRO films of ability substitute traditional rolled film, have the advantage that：

1）Contamination resistance is strong：Film is not easy to be blocked up by dirt, and system stability is more preferable；Influenced from Biochemical Treatment；Film makes Use longer life expectancy.

2）Rate of recovery higher：The operating pressure higher of DTNF and DTRO, has the rate of recovery of higher, and rate of recovery highest can be done It is less to 90-95%, the concentrated water of generation.

3）Dope accomplishes zero-emission：Dope carries out multiple-effect evaporation, and evaporation crystal is filled, accomplishes that wastewater zero discharge subtracts Few secondary pollution.

According to the above embodiment, the utility model can be realized well.What deserves to be explained is set based on said structure On the premise of meter, to solve same technical problem, some made on the utility model without substantive change or Polishing, the essence of used technical solution is still as the utility model, therefore it should also be as the protection in the utility model In the range of.

Claims

1. a kind of landfill leachate film processing system, including collecting pit, concrete sedimentation basin, anaeration in normal temperature pond, A/O-MBR, dirt Mud thickener and sludge filter press, it is characterised in that further include：

DTNF/DTRO film filters, its be provided with an inlet being connected with the A/O-MBR, one be connected with multiple-effect The outlet of evaporator concentrated water, a discharge outlet up to standard；

Multi-effect evaporator, it is provided with a concentrated water import being connected with the DTNF/DTRO film filters, a condensed water Floss hole, a residue remove mouth, a steam inlet；

Methane boiler, its be provided with for be connected with the methane outlet in the anaeration in normal temperature pond biogas entrance, for it is described The steam (vapor) outlet of the steam inlet connection of multi-effect evaporator.

2. landfill leachate film processing system according to claim 1, it is characterised in that the A/O-MBR is anaerobism/good Aerobic membrane bioreactor.

3. landfill leachate film processing system according to claim 1, it is characterised in that the DTNF/DTRO membrane filtrations The filter core of device employs DTNF films and DTRO films at the same time.

4. landfill leachate film processing system according to claim 1, it is characterised in that the sludge concentration tank and described The filtrate (liquid of sludge filter press is connected with the collecting pit.