CN209468142U - A kind of landfill leachate concentration liquid treating system - Google Patents
A kind of landfill leachate concentration liquid treating system Download PDFInfo
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- CN209468142U CN209468142U CN201821849158.6U CN201821849158U CN209468142U CN 209468142 U CN209468142 U CN 209468142U CN 201821849158 U CN201821849158 U CN 201821849158U CN 209468142 U CN209468142 U CN 209468142U
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Abstract
The utility model relates to a kind of landfill leachates, and liquid treating system is concentrated, it include: preheating unit, including the quenched chemical feed pipe of raw water, pre- heat exchanger, material feeding box and feed pump, the inlet of material feeding box is arranged in the quenched chemical feed pipe of raw water, feed pump is arranged in the material feeding box, and pre- heat exchanger is connect by feed pump with material feeding box；Circulating and evaporating unit, including circulation heat exchanger, crystallizing evaporator, circulating pump, triple valve and drainage conduit；One end of circulation heat exchanger is connect with pre- heat exchanger, and the other end is connect with crystallizing evaporator, and the water inlet end of circulating pump is connect with the crystallizing evaporator, and the water outlet of the circulating pump is connect with the pre- heat exchanger and the drainage conduit respectively by triple valve；Heat exchange unit is recycled, including compressor, compressor one end are connect with the crystallizing evaporator, the other end is connected to the circulation heat exchanger.Landfill leachate concentration liquid treating system process flow provided by the utility model is shorter, and energy utilization rate is high.
Description
Technical field
The utility model relates to field of environment protection equipment, and liquid treating system is concentrated more particularly to a kind of landfill leachate.
Background technique
Landfill leachate refer to rubbish landfill and stacking process in due to organic matter in garbage matter decompose generate water and
Free water in rubbish and the sewage formed suspends in junk-heap body after the humidity of junk-heap body is more than its moisture holding capacity
Or the inorganic pollutions such as the organic pollutant dissolved and heavy metal will dissolve out therewith, generate percolate.
The technique that the processing of landfill leachate mainly uses at present is " pretreatment+MBR film biosystem+nanofiltration/reverse osmosis
Thoroughly ", due to use nanofiltration/reverse osmosis process, then necessarily lead to a certain amount of concentrate, be approximately inflow 20%~
25%, concentrate contains a large amount of nondegradable COD, ammonia nitrogen, total nitrogen, salinity etc., liquid processing method is commonly concentrated are as follows: dense
The recharge of contracting liquid transports to municipal sewage plant, the concentration liquid treating system based on Fenton reagent, at ozone oxidation concentrate outside
Reason system, evaporation and crystallization system.But with the extension of time, recharge will lead to the dissolution in landfill leachate to refuse landfill
Salt accumulation increases so as to cause osmotic pressure, reduces the purification efficiency of film processing system and gradually decreases with recycle-water rate.Outward transport
To municipal wastewater treatment plant mode then because seriously affecting the operation of municipal wastewater treatment plant, forbid in standard in 2008.With Fenton
Concentration liquid treating system based on reagent, medicine system is especially complex and can generate secondary concentration liquid, cannot be fully solved
The problem of concentrate.Based on ozone oxidation ozone oxidation concentration liquid treating system final outflow water tend not to it is up to standard, and
Ozone after oxidation needs ozonolysis equipment, and operating cost is high.Evaporation and crystallization system can be thorough by the processing of this part dope, but
Conventional evaporation and crystallization system can not solve landfill leachate evaporation bubble problem, not can guarantee stable water outlet, and conventional steaming
Hair crystal system can only achieve concentration and be unable to reach crystallization purpose.
Utility model content
Based on this, it is necessary at least one problem mentioned above, provide a kind of landfill leachate concentration liquid processing
System.
A kind of landfill leachate concentration liquid treating system, comprising:
Preheating unit, including the quenched chemical feed pipe of raw water, pre- heat exchanger, material feeding box and feed pump, the quenched dosing of raw water
The inlet of the material feeding box is arranged in pipe, and the feed pump is arranged in the material feeding box, and the pre- heat exchanger passes through described
Feed pump is connect with the material feeding box；
Circulating and evaporating unit, including circulation heat exchanger, crystallizing evaporator, circulating pump, triple valve and drainage conduit；The circulation
One end of heat exchanger is connect with pre- heat exchanger, and the other end is connect with the crystallizing evaporator, the water inlet end of the circulating pump and institute
Crystallizing evaporator connection is stated, the water outlet of the circulating pump is connected with the pre- heat exchanger and the drainage conduit respectively by triple valve
It connects；
Heat exchange unit is recycled, including compressor, described compressor one end are connect with the crystallizing evaporator, the other end and institute
State circulation heat exchanger connection.
The landfill leachate concentration liquid treating system further includes post-processing unit in one of the embodiments,；It is described
Post-processing unit includes thickener and scraper centrifugal machine, and the water inlet end of the thickener is connect with the drainage conduit, water outlet with
The scraper centrifugal machine connection, the scraper centrifugal machine are also connect with material feeding box, and the scraper centrifugal machine further includes solids exit
Mouthful.
The pre- heat exchanger includes the first heat exchanging chamber and the second heat exchanging chamber, the circulating picture-changing in one of the embodiments,
Hot device includes the first heat exchanger tube and the second heat exchanger tube；First heat exchanging chamber is connect with the feed pump；First heat exchanger tube
Water inlet end connect with second heat exchanging chamber, water outlet is connect with the crystallizing evaporator.
The pre- heat exchanger includes the first heat exchanging chamber and the second heat exchanging chamber, the circulating picture-changing in one of the embodiments,
Hot device includes the first heat exchanger tube, the second heat exchanger tube and third heat exchanger tube；Liquid treating system is concentrated in the landfill leachate
Steam supplementary units, including steam inlet tube, condensate return pipe, the steam inlet tube are connect with the third heat exchanger tube,
The condensate return pipe is connect with the circulation heat exchanger.
The top of the crystallizing evaporator is connected to the inlet end of the compressor in one of the embodiments,.
The circulating and evaporating unit further includes one set on circulation heat exchanger and crystallizing evaporator in one of the embodiments,
Between throttle valve.
Landfill leachate concentration liquid treating system provided by the utility model is by circulating and evaporating unit to landfill leachate
Concentrate carries out circulating and evaporating crystallization, shortens process flow, and by recycling heat exchange unit for evaporative crystallization in crystallizing evaporator
The raw water that the steam of formation successively treats evaporative crystallization carries out reheating and preheating, improves the using energy source of evaporative crystallization
Rate reduces energy consumption.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that liquid treating system is concentrated in landfill leachate in an embodiment of the present invention.
Specific embodiment
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.The preferred embodiment of the utility model is given in attached drawing.But the utility model can come in many different forms in fact
It is existing, however it is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is makes public affairs to the utility model
The understanding for opening content is more thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein "and/or" includes
Any and all combinations of one or more related listed items.
A kind of landfill leachate concentration liquid treating system is provided in an embodiment of the present invention, as shown in Figure 1, including
Preheating unit 1, circulating and evaporating unit 2 and recycling heat exchange unit 3, subitem is described in detail below:
Preheating unit 1, including the quenched chemical feed pipe 11 of raw water, pre- heat exchanger 12, material feeding box 13 and feed pump 14.Wherein raw water
Quenched chemical feed pipe 11 is arranged in the inlet of material feeding box 13, percolate or concentrate by the quenched chemical feed pipe 11 of raw water enter into
In hopper 13, feed pump 14 is arranged in material feeding box 13, and pre- heat exchanger 12 is connect by feed pump 14 with material feeding box 13.Feed pump
14 can send the solution in material feeding box 13 into preheating heat exchanger.Preheating unit 1 will be obtained from landfill leachate or concentrate
Raw water is preheated to 50~90 DEG C.
Circulating and evaporating unit 2, including circulation heat exchanger 25, crystallizing evaporator 21, circulating pump 22, triple valve 23 and drainage conduit
24.Wherein one end of circulation heat exchanger 25 is connect with pre- heat exchanger 12, and the other end is connect with crystallizing evaporator 21, circulating pump 22
Water inlet end is connect with crystallizing evaporator 21, the water outlet of circulating pump 22 by triple valve 23 respectively with pre- heat exchanger 12 and drainage conduit
24 connections.Preferably, circulating and evaporating unit 2 further includes a throttle valve being set between circulation heat exchanger 25 and crystallizing evaporator 21
26, it may make circulation fluid decompression to enter crystallizing evaporator 21, and under the pressure of -0.02~0.05MPa, form steam and go forward side by side
Enter to recycle heat exchange unit 33.It evaporated in crystallizing evaporator 21, crystallize while occurring, therefore the circulation fluid in crystallizing evaporator 21
TDS may be up to 400000~500000mg/L.
Heat exchange unit 33 is recycled, including compressor, compressor one end are connect with crystallizing evaporator 21, the other end and circulating picture-changing
Hot device 25 is connected to.Preferably, the top of crystallizing evaporator 21 is connected to the inlet end of compressor.Recycle heat exchange unit 33 and circulation
Evaporation element 2 cooperates the steam for forming evaporative crystallization to carry out reheating to 105~120 DEG C to the raw water after preheating, and
The condensed water that reheating is formed preheats raw water.By this equipment and operating process, evaporative crystallization is improved
Energy utilization rate, reduce energy consumption.
Need to illustrate when, it is sodium chloride, sodium sulphate, ammonia nitrogen and organic that the main component object in liquid, which is concentrated, in landfill leachate
Object etc., and organic matter and ammonia nitrogen enter compressor mostly in evaporation and crystal process, influence heat exchange efficiency, and in preheating unit 1
The quenched chemical feed pipe 11 of raw water can be used for fixing ammonia nitrogen, can avoid this and happens.Crystallized in crystallizing evaporator 21 predominantly
Sodium chloride, therefore in the present embodiment crystallizing evaporator 21 when the concentration of control concentrate, precipitation crystallization is also started with sodium chloride and is preferred.
As a preferred scheme, it further includes post-processing unit 6 that liquid treating system, which is concentrated, in landfill leachate；Post-processing is single
Member 6 includes thickener 61, mother liquor reflux pipe 62 and scraper centrifugal machine 63, and the water inlet end of thickener 61 is connect with drainage conduit 24, out
Water end (W.E.) is connect with scraper centrifugal machine 63, and scraper centrifugal machine 63 is also connect with material feeding box 13 by mother liquor reflux pipe 62, scraper centrifugation
Machine 63 further includes solid outlet 64.The water inlet end of scraper centrifugal machine 63 is connect with the water outlet of thickener 61, scraper centrifugal machine
63 water outlet is connect with raw water box, and solid outlet 64 operates shifting for being discharged other than solids.Drainage conduit 24 is discharged dense
Contracting liquid, which can pass sequentially through, carries out thickener 61, scraper centrifugal machine 63, so that the salt and organic matter in concentrate largely being capable of shapes
At separation of solid and liquid, and the mother liquor after separating then returns to material feeding box 13, re-starts evaporation with system.
Preferably, pre- heat exchanger 12 includes the first heat exchanging chamber and the second heat exchanging chamber, and circulation heat exchanger 25 includes the first heat exchange
Pipe and the second heat exchanger tube, wherein the first heat exchanging chamber is connect with feed pump 14, the water inlet end of the first heat exchanger tube and the second heat exchanging chamber connect
It connects, water outlet is connect with crystallizing evaporator 21.In order to improve the utilization rate of evaporative crystallization effect and the energy, the water inlet of circulating pump 22
End is connect with the first heat exchanger tube and drainage conduit 24 with the connection of 21 bottom of crystallizing evaporator, water outlet by triple valve 23 respectively, when
After liquid heating concentration in crystallizing evaporator 21 reaches setting value, adjustable triple valve 23 makes drainage conduit 24 and circulating pump 22
Water outlet connection, circulating pump 22 can drive concentrate to be discharged by drainage conduit 24 in order to later crystallization, and work as crystallizing evaporator
When liquid in 21 is lower than setting concentration, then triple valve 23 is closed, and circulating pump 22 is defeated by the liquid circulation in crystallizing evaporator 21
It is sent in the first heat exchanger tube to carry out circulating-heating, consequently facilitating circulation heat exchanger 25 and crystallizing evaporator 21 can be recycled to rubbish
Rubbish diafiltration concentrated liquor is heated, and is conducive to improve heating efficiency, is shortened heating stroke.
Another Preferable scheme is that, circulation heat exchanger 25 further includes third heat exchanger tube, and the second heat exchanger tube is changed with third
Be high-temperature medium in heat pipe, can the heat exchanger plates of heat exchanging device heated to be transferred to the first heat exchanger tube, and by the first heat exchange
Raw water reheating after preheating in pipe is to 105~120 DEG C.Landfill leachate concentration liquid treating system further includes steam supplement
Unit 4, steam supplementary units 4 include steam inlet tube 41, condensate return pipe 42, and steam inlet tube 41 and third heat exchanger tube connect
It connects, condensate return pipe 42 is connect with circulation heat exchanger 25.The nozzle of condensate return pipe 42 is located on condensing hot air furnace case 5,
For recycling condensed water.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (6)
1. liquid treating system is concentrated in a kind of landfill leachate characterized by comprising
Preheating unit, including the quenched chemical feed pipe of raw water, pre- heat exchanger, material feeding box and feed pump, the quenched chemical feed pipe of raw water are set
It sets in the inlet of the material feeding box, the feed pump is arranged in the material feeding box, and the pre- heat exchanger passes through the water supply
Pump is connect with the material feeding box；
Circulating and evaporating unit, including circulation heat exchanger, crystallizing evaporator, circulating pump, triple valve and drainage conduit；The cycle heat exchange
One end of device is connect with pre- heat exchanger, and the other end is connect with the crystallizing evaporator, the water inlet end of the circulating pump and the steaming
Crystallizer connection is sent out, the water outlet of the circulating pump is connect with the pre- heat exchanger and the drainage conduit respectively by triple valve；
Heat exchange unit is recycled, including compressor, described compressor one end are connect with the crystallizing evaporator, the other end is followed with described
The connection of ring heat exchanger.
2. liquid treating system is concentrated in landfill leachate according to claim 1, which is characterized in that the landfill leachate thick
Contracting liquid treating system further includes post-processing unit；The post-processing unit includes thickener and scraper centrifugal machine, the thickener
Water inlet end connect with the drainage conduit, water outlet is connect with the scraper centrifugal machine, the scraper centrifugal machine also with material feeding box
Connection, the scraper centrifugal machine further includes solid outlet.
3. liquid treating system is concentrated in landfill leachate according to claim 1, which is characterized in that the pre- heat exchanger includes
First heat exchanging chamber and the second heat exchanging chamber, the circulation heat exchanger include the first heat exchanger tube and the second heat exchanger tube；First heat exchange
Chamber is connect with the feed pump；The water inlet end of first heat exchanger tube is connect with second heat exchanging chamber, water outlet and the steaming
Send out crystallizer connection.
4. liquid treating system is concentrated in landfill leachate according to claim 1, which is characterized in that the pre- heat exchanger includes
First heat exchanging chamber and the second heat exchanging chamber, the circulation heat exchanger include the first heat exchanger tube, the second heat exchanger tube and third heat exchanger tube；Institute
Stating landfill leachate concentration liquid treating system further includes steam supplementary units, including steam inlet tube, condensate return pipe, described
Steam inlet tube is connect with the third heat exchanger tube, and the condensate return pipe is connect with the circulation heat exchanger.
5. liquid treating system is concentrated in landfill leachate according to claim 1, which is characterized in that the crystallizing evaporator
Top is connected to the inlet end of the compressor.
6. liquid treating system is concentrated in landfill leachate according to claim 1, which is characterized in that the circulating and evaporating unit
It further include a throttle valve being set between circulation heat exchanger and crystallizing evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821849158.6U CN209468142U (en) | 2018-11-09 | 2018-11-09 | A kind of landfill leachate concentration liquid treating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821849158.6U CN209468142U (en) | 2018-11-09 | 2018-11-09 | A kind of landfill leachate concentration liquid treating system |
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| Publication Number | Publication Date |
|---|---|
| CN209468142U true CN209468142U (en) | 2019-10-08 |
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ID=68087351
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821849158.6U Active CN209468142U (en) | 2018-11-09 | 2018-11-09 | A kind of landfill leachate concentration liquid treating system |
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| Country | Link |
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| CN (1) | CN209468142U (en) |
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2018
- 2018-11-09 CN CN201821849158.6U patent/CN209468142U/en active Active
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