Ammonium hydrogen carbonate system is recycled in the processing of landfill leachate
Technical field
The utility model belongs to technical field of sewage, and carbonic acid is recycled in the processing more particularly to a kind of landfill leachate
Hydrogen ammonium system.
Background technique
Landfill leachate be rubbish during stacking and landfill due to fermentation, rain drop erosion and surface water, underground water logging
Bubble and be percolated come out sewage, percolate is a kind of high concentrated organic wastewater of complicated component, property depend on component of refuse,
The factors such as partial size, compaction, the weather at scene, hydrologic condition and the landfill time of rubbish.Containing a large amount of rotten in percolate
The macromolecule organics such as matter are grown, biodegradability is poor, and pH value tends to alkalescent, and ammonia nitrogen concentration is higher, due to garbage filter
The features above of liquid becomes a great problem of domestic and international sewage treatment.
A kind of method handling landfill leachate disclosed in 106800330 A of Chinese patent publication No. CN, after fermentation
PH adjusting is carried out, takes supernatant after centrifugation, adjusts back PH, addition flocculant staticly settles, compared to other biodegrading process, although one
Determine to shorten the processing time to landfill leachate in degree, problem remain, however, that one, addition PH regulator carries out
PH is adjusted, and added amount of chemical is high, increases processing cost;Two, the ammonium bicarbonate in landfill leachate is not recycled, and needs to carry out
Secondary treatment;Three, the processing time of landfill leachate is longer, is not able to satisfy industrialized demand.
Utility model content
The utility model is mainly solving the technical problems that provide a kind of processing recycling ammonium hydrogen carbonate system of landfill leachate
System not only effectively improves the treatment effeciency of landfill leachate, reduces processing cost, but also ammonia directly recycled, bicarbonate is made
Ammonium.
In order to solve the above technical problems, the technical solution that the utility model uses is: a kind of place of landfill leachate
Reason recycling ammonium hydrogen carbonate system, including deammoniation tower, the steam inlet of the deammoniation tower be connected to jet chimney, and the steam into
Mouth is located between the wastewater inlet of the deammoniation tower and the liquid outlet of the deammoniation tower, and the liquid outlet of the deammoniation tower is located at described
The lower section of the wastewater inlet of deammoniation tower, the gas outlet of the deammoniation tower are located at the top of the deammoniation tower, the deammoniation tower it is interior
Portion is equipped with W type column plate and spray head, and the W type column plate and the spray head are all located at the top of the steam inlet, the W
The inner wall of the deammoniation tower is fixed in the side of type column plate, and the inner wall of the other side of the W type column plate and the deammoniation tower it
Between form sewage flow mouth, short transverse interlaced distribution of the adjacent W type column plate along the deammoniation tower, and adjacent institute
It states and is equipped with the spray head between W type column plate, the spray head is connected to cleaning pipeline, the cleaning pipeline and cleaning liquid medicine case
Connection;
When it is implemented, the cleaning liquid medicine case is that sulfamic acid cleans liquid medicine case;
The side wall lower ends of the groove of the W type column plate are equipped with gas communication port, and the gas communication port runs through the W type tower
The upper and lower surfaces of plate.
It further says, further includes ammonia recovery unit, magma slot, centrifugal separating device and mother liquor pond, the deammoniation tower
Be connected between gas outlet and the air inlet of the ammonia recovery unit by ammonia pipeline, the outlet of the solid-liquid of the ammonia recovery unit with
The magma slot connection, the magma slot are connected to the centrifugal separating device, the centrifugal separating device and the mother liquor pond
Connection, the liquid pump in the mother liquor pond are connected to the ammonia recovery unit.
It further says, the ammonia pipeline is equipped with condensate liquid knockout drum, and the condensate liquid knockout drum includes condenser
And knockout drum, the condenser are located at the top of the knockout drum, the cooling water inlet of the condenser and the condenser
Water outlet is all connected to cooling tank, and the gas outlet of the deammoniation tower is connected to the air inlet of the condenser, the condenser
Gas outlet is connected to the knockout drum, and the liquid outlet of the knockout drum is connected by the circulation fluid import of circulation pipe and the deammoniation tower
Logical, the gas outlet of the knockout drum is connected to the air inlet of the ammonia recovery unit.
It further says, further includes sump and heat exchanger, the sump is connected to the wastewater inlet of the heat exchanger,
The outlet of sewer of the heat exchanger is connected to the wastewater inlet of the deammoniation tower, the liquid outlet of the deammoniation tower and the heat exchanger
Inlet connection, the water outlet of the heat exchanger is connected to pond is discharged.
Further say, the gas outlet of the ammonia recovery unit is connected to the air inlet of vacuum pump, the vacuum pump into
The mouth of a river is connected to cooling tank, and the exhaust outlet of the vacuum pump is connected to exhaust pipe.
Further say, further include cooler, the liquid outlet of the inlet of the cooler and the cooler all with institute
It states ammonia recovery unit to be connected to, the water outlet of the water inlet of the cooler and the cooler is all connected to cooling tank.
It further says, is connected between the sump and the wastewater inlet of the heat exchanger by sewage conveying tube, it is dirty
It is successively arranged sewage transport pump and defoaming agent dosing mouth by the conveying direction of sewage in water delivery pipe, the defoaming agent dosing mouth is logical
Chemical feed pipe is crossed to be connected to defoaming agent dosing tank.
It further says, is successively arranged the first solenoid valve along the flow direction of the liquid on circulation pipe, circulating pump, subtracts
Pressure valve, threeway, check-valves, second solenoid valve and flowmeter pass through between the circulation fluid import and the threeway of the knockout drum
Reflux line connection, and reflux line is equipped with third solenoid valve.
The beneficial effects of the utility model at least have the following:
The inner wall of deammoniation tower, and the other side of W type column plate and deammoniation tower are fixed in the side of the W type column plate of the utility model
Inner wall between formed sewage flow mouth, adjacent W type column plate along deammoniation tower the interlaced distribution of short transverse, increase rubbish
It the time that percolate circulates on W type column plate, decomposes landfill leachate sufficiently, improves treatment effeciency, it is worth mentioning at this point that, W
The side wall lower ends of the groove of type column plate are equipped with gas communication port, and gas communication port runs through the upper and lower surfaces of W type column plate, in tower
Gas is in gas communication port to the calcium carbonate and magnesium carbonate for effectivelying prevent landfill leachate to be decomposed to form during upper circulation
Equal substances are more preferably equipped with spray head, spray head and cleaning in the bottom portion of groove fouling of W type column plate between adjacent W type column plate
Pipeline connection, deammoniation tower is every using 2-3 months, is removed dirt remaining on W type column plate by sulfamic acid;
The utility model further includes ammonia recovery unit, magma slot, centrifugal separating device and mother liquor pond, in ammonia recovery unit
Solidliquid mixture squeezes into the stirring cooling of magma slot by pumping, and separates ammonium hydrogen carbonate solid finally by centrifugal separating device,
Ammonia recovery unit is squeezed into after the caching of remaining solution feeding mother liquor pond to be recycled again;
The condensate liquid knockout drum of the utility model includes condenser and knockout drum, and the liquids and gases condensed in condenser are logical
Knockout drum separation is crossed, liquid is re-fed into deammoniation tower by circulation pipe and carries out secondary treatment recycling, more preferably, edge on circulation pipe
The flow direction of liquid be successively arranged the first solenoid valve, circulating pump, pressure reducing valve, threeway, check-valves, second solenoid valve and flow
Meter is connected between the circulation fluid import and threeway of knockout drum by reflux line, and reflux line is equipped with third solenoid valve, this
Kind structure design, effectively controls the treating capacity of deammoniation tower in the unit time, reflux line makes the liquid in knockout drum flow back again
To knockout drum, guarantee the treatment effect of deammoniation tower, the gas and liquid that check-valves is effectively prevent in tower enter knockout drum;
The ammonia recovery unit of the utility model is additionally provided with cooler, the liquid outlet of the inlet of cooler and cooler all with
Ammonia recovery unit connection, the water inlet of cooler and the water outlet of cooler are all connected to cooling tank, and recovery ammonia is effectively prevent to fill
While setting the ammonium bicarbonate breaks down of interior formation, the solubility of ammonium hydrogen carbonate in liquid is reduced, ammonium bicarbonate crystal is precipitated, more
Good, the gas outlet of ammonia recovery unit is connected to the air inlet of vacuum pump, and ammonia passes through after the water in vacuum pump dissolves again
Into ammonia recovery unit, purified carbon dioxide is discharged into air;
The utility model is additionally provided with heat exchanger, will be fed into the liquid outlet of the refuse leachate in deammoniation tower and deammoniation tower
Liquid exchanges heat, to guarantee the temperature of the refuse leachate entered in deammoniation tower, reduces processing cost, more preferably, rubbish
It is also added with defoaming agent in rubbish percolate, effectively inhibits the generation of the bubble in deammoniation tower, improves treatment effect;
The utility model successively includes sump, heat exchanger, deammoniation tower, condensate liquid knockout drum, ammonia by processing recovery process
Recyclable device, magma slot, centrifugal separating device and mother liquor pond, the gas after landfill leachate is decomposed by deammoniation tower flow into condensation
Ammonia recovery unit is sent into after liquid knockout drum is cooling, ammonium hydrogen carbonate is precipitated in crystallization, while carrying out processing decomposition to landfill leachate,
It is used for the ammonia of abjection and carbon dioxide to produce ammonium hydrogen carbonate, compared with traditional PH treatment process, greatly reduces processing
Cost recovery.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model;
Fig. 2 is the enlarged drawing at the A of Fig. 1 of the utility model;
Fig. 3 is the enlarged drawing at the B of Fig. 1 of the utility model;
Fig. 4 is the structural schematic diagram of the W type column plate of the utility model;
Each section label is as follows in attached drawing:
Deammoniation tower 1, steam inlet 11, W type column plate 12, gas communication port 121, spray head 13, sewage flow mouth 14, steam
Pipeline 2, cleaning pipeline 3, cleaning liquid medicine case 4, ammonia recovery unit 5, magma slot 6, centrifugal separating device 7, mother liquor pond 8, liquid pump 81,
Condensate liquid knockout drum 9, knockout drum 92, cooling tank 10, circulation pipe 100, the first solenoid valve 101, circulating pump 102, subtracts condenser 91
Pressure valve 103, threeway 104, check-valves 105, second solenoid valve 106, flowmeter 107, reflux line 108, third solenoid valve 109,
Sump 200, heat exchanger 300, discharge pond 400, vacuum pump 500, exhaust pipe 501, cooler 600, sewage conveying tube 700,
Sewage transport pump 800, chemical feed pipe 900 and defoaming agent dosing tank 1000.
Specific embodiment
The preferred embodiment of the utility model is described in detail with reference to the accompanying drawing, so that the advantages of the utility model
It can be easier to be readily appreciated by one skilled in the art with feature, to make the protection scope of the utility model apparent clear
Define.
Embodiment: a kind of processing recycling ammonium hydrogen carbonate system of landfill leachate, as shown in Figs 1-4, including deammoniation tower 1,
The steam inlet 11 of the deammoniation tower is connected to jet chimney 2, and the steam inlet 11 be located at the sewage of the deammoniation tower 1 into
Between mouth and the liquid outlet of the deammoniation tower 1, the liquid outlet of the deammoniation tower 1 is located under the wastewater inlet of the deammoniation tower 1
Side, the gas outlet of the deammoniation tower 1 are located at the top of the deammoniation tower 1, and the inside of the deammoniation tower is equipped with W type column plate 12 and spray
Head 13 is drenched, and the W type column plate and the spray head 13 are all located at the top of the steam inlet 11, the W type column plate 12
The inner wall of the deammoniation tower 1, and shape between the other side of the W type column plate 12 and the inner wall of the deammoniation tower 1 are fixed in side
At sewage flow mouth 14, the adjacent W type column plate 12 along the deammoniation tower 1 the interlaced distribution of short transverse, and it is adjacent
The spray head 13 is equipped between the W type column plate 12, the spray head 13 is connected to cleaning pipeline 3, the cleaning pipeline 3 and
Liquid medicine case 4 is cleaned to be connected to;
When it is implemented, the cleaning liquid medicine case 4 is that sulfamic acid cleans liquid medicine case;
The side wall lower ends of the groove of the W type column plate 12 are equipped with gas communication port 121, and the gas communication port 121 runs through
The upper and lower surfaces of the W type column plate 12.
It further include ammonia recovery unit 5, magma slot 6, centrifugal separating device 7 and mother liquor pond 8, the gas outlet of the deammoniation tower 1
Be connected between the air inlet of the ammonia recovery unit 5 by ammonia pipeline, the outlet of the solid-liquid of the ammonia recovery unit 5 with it is described
Magma slot 6 is connected to, and the magma slot 6 is connected to the centrifugal separating device 7, the centrifugal separating device 7 and the mother liquor pond 8
Connection, the liquid pump 81 in the mother liquor pond 8 are connected to the ammonia recovery unit 5.
The ammonia pipeline is equipped with condensate liquid knockout drum 9, and the condensate liquid knockout drum 9 includes condenser 91 and knockout drum
92, the condenser 91 is located at the top of the knockout drum 92, the cooling water inlet and the condenser 91 of the condenser 91
Water outlet be all connected to cooling tank 10, the gas outlet of the deammoniation tower 1 is connected to the air inlet of the condenser 91, described cold
The gas outlet of condenser 91 is connected to the knockout drum 92, and the liquid outlet of the knockout drum 92 passes through circulation pipe 100 and the deamination
The circulation fluid inlet communication of tower 1, the gas outlet of the knockout drum 92 are connected to the air inlet of the ammonia recovery unit 5.
It further include sump 200 and heat exchanger 300, the sump 200 and the wastewater inlet of the heat exchanger 300 connect
Logical, the outlet of sewer of the heat exchanger 300 is connected to the wastewater inlet of the deammoniation tower 1, the liquid outlet of the deammoniation tower 1 and institute
The inlet connection of heat exchanger 300 is stated, the water outlet of the heat exchanger 300 is connected to discharge pond 400.
The gas outlet of the ammonia recovery unit 5 is connected to the air inlet of vacuum pump 500, the water inlet of the vacuum pump 500
It is connected to cooling tank 10, the exhaust outlet of the vacuum pump 500 is connected to exhaust pipe 501.
Further include cooler 600, the liquid outlet of the inlet of the cooler 600 and the cooler 600 all with it is described
Ammonia recovery unit 5 is connected to, and the water inlet of the cooler 600 and the water outlet of the cooler 600 are all connected to cooling tank 10.
It is connected between the sump 200 and the wastewater inlet of the heat exchanger 300 by sewage conveying tube 700, sewage
Sewage transport pump 800 and defoaming agent dosing mouth, the defoaming agent dosing are successively arranged by the conveying direction of sewage in delivery pipe 700
Mouth is connected to by chemical feed pipe 900 with defoaming agent dosing tank 1000.
The first solenoid valve 101, circulating pump 102, decompression are successively arranged along the flow direction of the liquid on circulation pipe 100
Valve 103, threeway 104, check-valves 105, second solenoid valve 106 and flowmeter 107, the circulation fluid import of the knockout drum 92 and institute
It states and is connected between threeway 104 by reflux line 108, and reflux line 108 is equipped with third solenoid valve 109.
The working principle of the utility model is as follows: the landfill leachate of sump being added after defoaming agent and is added by heat exchanger
It is sent into deammoniation tower after heat from the wastewater inlet of deammoniation tower, is added by inside of the steam in jet chimney to deammoniation tower
Heat is warming up to 70-80 DEG C, and landfill leachate flows to right under the guide functions of W type column plate from the left end of upper one piece of W type column plate
End, then left end is flowed to from the right end of next layer of W type column plate, it is back and forth from top to bottom flowed with this, by the carbonic acid in landfill leachate
The substances such as hydrogen ammonium, calcium bicarbonate, magnesium bicarbonate are decomposed, and last calcium carbonate, magnesium carbonate, water and organic matter etc. are from deammoniation tower
Liquid outlet is sent into discharge pond after heat exchanger, and ammonia, carbon dioxide and a small amount of vapor are sent by the gas outlet of deammoniation tower
Enter condensate liquid knockout drum;Ammonia and carbon dioxide into condensate liquid knockout drum are sent into separation after condenser cooling down
Tank, a small amount of ammonium bicarbonate mixed liquor are back to deammoniation tower deamination, and most of ammonia and carbon dioxide enter ammonia recovery unit and generate carbonic acid
Hydrogen ammonium salt solution;As ammonia and carbon dioxide constantly enter ammonia recovery unit, ammonia recovery unit is cooled down by cooler,
Ammonium bicarbonate soln concentration is higher and higher, is more than finally saturated concentration, and ammonium bicarbonate crystalline substance salts out, then by pump to squeeze into the stirring of magma slot cold
But, ammonium hydrogen carbonate solid is separated finally by centrifugal separating device, remaining solution is squeezed into after being sent into mother liquor pond caching
Ammonia recovery unit is recycled again.
The above description is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all
Equivalent structure transformation made based on the specification and figures of the utility model, it is relevant to be applied directly or indirectly in other
Technical field is also included in the patent protection scope of the utility model.