CN102910764A - Device and method for simultaneously treating marine waste gas and waste water - Google Patents

Abstract

The invention discloses a device and a method for simultaneously treating marine waste gas and waste water. The device comprises washing towers (1, 2), a draught fan (3), a draining pump (4) and a transfer pump (5), wherein the washing towers (1, 2) are internally provided with a spray layer (102), a waste water storage tank (103), a carbon gel layer (104) positioned inside the waste water storage tank (103) and a bubbling layer (105) from top to bottom in sequence; the waste water is sprayed out downwards through the spray layer (102) to flow in the waste water storage tank (103); and the waste gas enters the carbon gel layer (104) in the waste water storage tank (103) through the bubbling layer (105) and is washed and purified by the waste water. The device and the method for simultaneously treating marine waste gas and waste water disclosed by the invention have the advantages of simplifying the treatment technology, improving the treatment efficiency, saving the occupied space of the device and reducing the consumption of energy.

Description

A kind of device and method of processing simultaneously marine exhaust and waste water

Technical field

The invention belongs to environmental technology field, relate in particular to a kind of device and method that utilizes the carbon gel to dispose simultaneously marine exhaust waste water.

Background technology

In recent years, along with the prosperity of international shipping, the SO in the boat diesel engine discharging waste gas ₂Atmospheric environment caused day by day seriously influence, become acid rain and air-polluting main source.Therefore, supplemental provisions VI being defined as oxysulfide of " 73/78 pollution convention ": the sulphur content of any fuel oil that boats and ships use must not surpass 4.5wt%, at baltic SO ₂The employed any fuel of the boats and ships in emission control district, sulphur content must not surpass 1.5wt%.Boats and ships can use waste gas cleaning system that the oxysulfide total release is reduced to 6.0g/(kWh) below.On the other hand, " 73/78 pollution convention " supplemental provisions I stipulates that all 400 gross tons and above any boats and ships drainage water oleaginousness are less than 100ppm; All 10000 gross tons and above boats and ships drainage water oleaginousness are less than 15ppm.

Present boats and ships treatment S O ₂Major technique be that seawater is washed, flue gas in washing tower with contained SO ₂Remove the SO of this method ₂Transformation efficiency is lower, needs to increase extra blower fan and blasts air; And the major technique of processing oily(waste)water is gravity separation, flotation separation, filtration or absorption.Therefore to dispose simultaneously multiple pollutant at present, will need two or more devices to unite use, this meeting is so that the expense that boats and ships drop into writing at its pollutant handling arrangement, and the operation and maintenance of its treatment system also can become suitable complexity, increased working cost.

Summary of the invention

The technical problem to be solved in the present invention is, for the defects of prior art, provides a kind of method of processing simultaneously marine exhaust and waste water, and a kind of device of processing simultaneously marine exhaust and waste water further is provided.

For achieving the above object, the adoptable technical scheme of the present invention is:

A kind of device of processing simultaneously marine exhaust and waste water, it comprises washing tower, induced draft fan, wet-pit and transferpump, set gradually spraying layer in the described washing tower from top to bottom, the waste water storage tank, be arranged in the carbon gel coat of described waste water storage tank, and bubble level, described induced draft fan and transferpump are respectively with waste gas, waste water blasts in the described washing tower, described waste water sprays downwards through described spraying layer, flow in the described waste water storage tank, described waste gas enters in the carbon gel coat in the described waste water storage tank and by described waste water cleaning through described bubble level, waste gas after the purification is discharged through the top of described washing tower, and the waste water in the described waste water storage tank is regularly discharged by described wet-pit.

Preferably, in the described device of processing simultaneously marine exhaust and waste water: described device also comprises vapour pipe, described vapour pipe is introduced described washing tower with steam, and described steam enters described carbon gel coat and it is carried out manipulation of regeneration, and described steam cooling pumps by described wet-pit.

Preferably, in the described device of processing simultaneously marine exhaust and waste water: described device also comprises recycle pump, and described recycle pump is used for waste water pump with described waste water storage tank to described spraying layer, and sprays downwards from described spraying layer.

Preferably, in the described device of processing simultaneously marine exhaust and waste water: described device also comprises Water Tank and sump pump, described sump pump is used for the sump pump on the boats and ships to described Water Tank storage, with treat described transferpump with described sump pump to described washing tower.

Preferably, in the described device of processing simultaneously marine exhaust and waste water: described recycle pump, sump pump and transferpump are mono-pump, described wet-pit is impeller pump, and described induced draft fan is high-temperature centrifugal fan, the working temperature of wherein said induced draft fan≤350 ℃.

The present invention further provides a kind of method of processing simultaneously marine exhaust and waste water, may further comprise the steps:

Waste gas on the boats and ships and waste water are pumped in the washing tower through induced draft fan, transferpump respectively, wherein said waste gas upwards enters carbon gel coat the waste water storage tank from the bubble level of wash tower bottoms, described waste water flows into described waste water storage tank from the spraying layer ejection at washing tower top;

In the described washing tower, the objectionable constituent in the described waste gas absorbed by described waste water or with described waste water in composition reaction;

Waste gas is after treatment discharged through the washing tower top, and waste water is after treatment regularly discharged by wet-pit.

Preferably, in the described method of processing simultaneously marine exhaust and waste water: described method also comprises to be introduced steam in the washing tower, and enters in the described carbon gel coat by described spraying layer, and described steam is used for making described carbon gel coat to recover adsorptive power.

Preferably, in the described method of processing simultaneously marine exhaust and waste water: described method also comprises by recycle pump the waste water pump in the described waste water storage tank to described spraying layer, and spray downwards from described spraying layer, so that waste water circulation uses, until described waste water fully adsorbs the objectionable constituent in the described waste gas and/or fully reacts with the objectionable constituent in the described waste gas.

The advantage of processing simultaneously the device of marine exhaust and waste water and having of the present invention comprises: dispose when can realize waste gas waste water, greatly simplified Pollution From Ships thing treatment process, saved investment cost; Adopt alkaline waste water to absorb acid waste gas, realized " treatment of wastes with processes of wastes against one another ", avoided the interpolation of additional absorbent/sorbent material, saved working cost; Relatively traditional seawer washing tower, employed waste water alkalescence strong (waste water ph is 10-12, and seawater pH value is 7.5-8.3), unit mass can absorb more SO ₂, effectively reduce and carry and spray flux, reduced the load of pump, saved the energy; SO ₂Removal efficiency is high, SO ₂Easier in H ₂SO ₄Transform, removal efficiency can reach more than 90%.

Will be appreciated that the feature in the above each side of the present invention is independent assortment within the scope of the invention, and be not subjected to the restriction of its order---as long as the technical scheme after the combination drops in the connotation of the present invention.That is to say that the arbitrary combination between the such scheme is also within connotation of the present invention.

Description of drawings

Below in conjunction with drawings and Examples the device that the present invention processes marine exhaust and waste water simultaneously is described further, in the accompanying drawing:

Fig. 1 is the structural representation that the present invention processes the device of marine exhaust and waste water simultaneously.

Embodiment

Below in conjunction with the drawings and specific embodiments, further illustrate the present invention, should understand these embodiments only is used for explanation the present invention and is not used in and limits the scope of the invention, after reading the present invention, those skilled in the art all falls within the application's claim limited range to the modification of the various equivalent form of values of the present invention.

As shown in Figure 1, the invention discloses a kind of device of processing simultaneously marine exhaust and waste water.In this device, adopt two washing towers 1,2 separately or the operation of string (also) connection.The device of processing simultaneously marine exhaust waste water comprises washing tower 1,2, spraying layer 102, waste water storage tank 103, carbon gel coat 104, bubble level 105, induced draft fan 3, recycle pump 106, wet-pit 4, sump pump 7, Water Tank 6, transferpump 5, waste gas from boat diesel engine passes through induced draft fan 3, enter bubble level from the bottom of washing tower 1, blast in the waste water storage tank 103, the carbon gel coat 104 in the waste water storage tank 103 in liquid phase with the SO in the waste gas ₂Catalyzed oxidation is H ₂SO ₄, and being neutralized by waste water, waste gas is discharged after the waste water spray further purifies at spraying layer 102, and the waste water behind the spray flows into the waste water storage tank 103 of wash tower bottoms, and greasy dirt wherein is by 104 absorption of carbon gel coat, and by recycle pump 106 recycles; Washing tower 1 waste water is replenished by transferpump 5 by Water Tank 6, and Water Tank 6 is collected from the sewer of desalting equipment and boiler via sump pump 7.

Scrubber system comprises spraying layer 102, waste water storage tank 103, carbon gel coat 104, bubble level 105, recycle pump 106, the 1.3-1.5 that is generally concentration of seawater from its concentration of sewer of desalting equipment doubly, thereby for SO ₂Assimilation effect better, and from the sewer of boiler owing in water treatment procedure, added Na ₃PO ₄, Na ₃PO ₄Hydrolysis generates NaOH, thereby can be used for SO ₂Absorption and H ₂SO ₄Neutralization.These waste water are collected in the Water Tank 6 by sump pump, and pH value is delivered to spraying layer 102 by transferpump 5 again and sprays between 10-12 after mixing, and spray afterwards waste water enters in the waste water storage tank 103, in and H ₂SO ₄The time wherein greasy dirt by carbon gel coat 104 absorption, waste water by carbon gel coat 104 returns spraying layer 102 recycles via recycle pump 106, remaining greasy dirt is further adsorbed simultaneously, when waste water greasy dirt content is regularly discharged via wet-pit more than or equal to 6.8 the time less than 15ppm and pH value, then strengthen cycle index when greasy dirt content is higher and continue to use the carbon gel-filtration, the higher fresh soda wastewater that then replenishes of pH value.When finding that the lasting higher increasing cycle index of greasy dirt content is invalid, then close the waste water and gas pipeline of washing tower, open vapour line, adopt pressure 0.5-1.3MPa, the saturation steam of temperature 165-194 ° of C enters washing tower by spraying layer the carbon gel coat is regenerated, and recovers absorption property.The reuse water that contains sump oil is discharged sump oil through wet-pit, and reply oil extraction pipeline cleans after the regeneration, prevents secondary pollution.

The boat diesel engine spent air temperture is 250-350 ° of C, SO ₂Concentration is 0-1000ppm, O ₂Concentration is 10%-15%, and waste gas replenishes power through induced draft fan, and then the bottom from washing tower enters bubble level, and bubble level top arranges the carbon gel coat, and the effect of carbon gel coat is with the SO in the waste gas ₂Catalyzed oxidation is H ₂SO ₄, because the SO of the katalysis of carbon gel and participation reaction ₂With O ₂The amount ratio be approximately 1:100, thereby do not need to blast extra air, and the middle and upper part of washing tower is provided with 2 layers of spraying layer, and the effect of spraying layer is to be that the waste water of 1:10 is sprayed onto in the washing tower uniformly with liquid-gas ratio, waste water is fully contacted, further the SO in the absorbing waste gas with waste gas ₂, and bring in the waste water storage tank and continue catalyzed oxidation by the carbon gel coat, the waste gas after the purification is discharged from the washing tower top.

Device of the present invention is adopted the individual washing tower of available two (many), and also parallel operation is used but they both can have been connected, also can a use, and maintenance or the regeneration of carbon gel.With the supporting recycle pump of washing tower, sump pump, transferpump because direct conveying oily(waste)water in order to reduce the disturbance to oil droplet, is selected mono-pump, and wet-pit is selected impeller pump, and induced draft fan is selected high-temperature centrifugal fan, blast 3000Pa, working temperature≤350 ℃.

Describe the specific works process of described device in conjunction with Fig. 1: during washing tower 1 work, open valve 801, waste gas enters washing tower 1, opens simultaneously valve 809, and recycle pump starts, and begins spray, and the waste gas behind the desulfurizing and purifying is discharged through valve 803; When the pH of waste water in washing tower value is down to 6.8 left and right sides, valve-off 809, recycle pump stops, and opens valve 806 and valve 807, starts transferpump displacement waste water, opens simultaneously valve 811 and valve 814, starts wet-pit and cooperates displacement; When draining greasy dirt content surpasses 15ppm and strengthens cycle index when invalid, need to regenerate this moment to the carbon gel coat, valve-off 801,803,809, recycle pump stops, and opens valve 811,813,808, transferpump starts, waste water in the washing tower 1 is drained into washing tower 2, and valve-off 811 subsequently, 813,808 and transferpump 5, open valve 815,807, pressure 0.5-1.3MPa, the saturation steam of temperature 165-194 ° of C enters washing tower 1, when the tower internal pressure reaches 0.5MPa, and valve-off 815,807, stop steam supply, after steam natural is cooled to liquid state in tower, Open valve 811,814, wet-pit starts, discharge greasy dirt, before reusing, open valve 806,807,811,814, transferpump and wet-pit start, flushing pipeline is until wash-down water greasy dirt content is less than 15ppm.

During washing tower 2 work, open valve 802, waste gas enters washing tower 2, opens simultaneously valve 810, and recycle pump starts, and begins spray, and the waste gas behind the desulfurizing and purifying is discharged through valve 804; When the pH of waste water in washing tower value is down to 6.8 left and right sides, valve-off 810, recycle pump stops, and opens valve 806 and valve 808, starts transferpump displacement waste water, opens simultaneously valve 812 and valve 814, starts wet-pit and cooperates displacement; When draining greasy dirt content surpasses 15ppm and strengthens cycle index when invalid, need to regenerate this moment to the carbon gel coat, valve-off 802,804,810, recycle pump stops, and opens valve 812,813,807, transferpump starts, waste water in the washing tower 2 is drained into washing tower 1, and valve-off 812 subsequently, 813,807 and transferpump 5, open valve 815,808, pressure 0.5-1.3MPa, the saturation steam of temperature 165-194 ° of C enters washing tower 2, when the tower internal pressure reaches 0.5MPa, and valve-off 815,808, stop steam supply, after steam natural is cooled to liquid state in tower, Open valve 812,814, wet-pit starts, discharge greasy dirt, before reusing, open valve 806,808,812,814, transferpump 5 and wet-pit 4 start, flushing pipeline is until wash-down water greasy dirt content is less than 15ppm.

As outlet SO ₂Concentration is higher than 6.0g/(kWh) time, then valve-off 803, open simultaneously valve 804 and valve 805, at this moment washing tower 1 and washing 2 tower serial operations; When exhausted air quantity was higher than single tower design flow, then valve-off 805, opened simultaneously valve 802 and valve 803, this moment washing tower 1 and washing tower 2 parallel operations.

The reaction equation of carbon gel coat catalyzed oxidation SO2 is as follows:

${\mathrm{\&sigma;}}_v+{\mathrm{SO}}_2\left(\mathrm{aq}\right)\&RightArrow;{\mathrm{\&sigma;}}_{{\mathrm{<figure-callout\; id="2"\; label="SO"\; filenames="HDA00002419351700011.png"\; state="\{\{state\}\}">SO</figure-callout>}}_2}$

${\mathrm{\&sigma;}}_{{\mathrm{<figure-callout\; id="2"\; label="SO"\; filenames="HDA00002419351700011.png"\; state="\{\{state\}\}">SO</figure-callout>}}_2}+1/2O_2\left(\mathrm{aq}\right)\&RightArrow;{\mathrm{\&sigma;}}_{{\mathrm{SO}}_3}$

${\mathrm{\&sigma;}}_{{\mathrm{SO}}_3}+H_{2}O\&RightArrow;{\mathrm{\&sigma;}}_{{\mathrm{<figure-callout\; id="2"\; label="H"\; filenames="HDA00002419351700011.png"\; state="\{\{state\}\}">H</figure-callout>}}_2{\mathrm{SO}}_4}$

${\mathrm{\&sigma;}}_{{\mathrm{<figure-callout\; id="2"\; label="H"\; filenames="HDA00002419351700011.png"\; state="\{\{state\}\}">H</figure-callout>}}_2{\mathrm{SO}}_4}\&RightArrow;{\mathrm{<figure-callout\; id="2"\; label="H"\; filenames="HDA00002419351700011.png"\; state="\{\{state\}\}">H</figure-callout>}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)+{\mathrm{\&sigma;}}_v$

σ wherein _v,

Be respectively the active sites in the carbon gel sky, adsorbed SO ₂Active sites, adsorbed SO ₃Active sites and adsorbed H ₂SO ₄Active sites, aq represents the aqueous solution.

The neutralization reaction equation of waste water is as follows:

H ₂SO ₄→2H ⁺+SO ₄ ^2-

Na ₃PO ₄+H ₂O→Na ₂HPO ₄+NaOH

OH ^-+H ⁺→H ₂O

CO ₃ ^2-+2H ⁺→CO ₂+H ₂O

HCO ₃ ^-+H ⁺→CO ₂+H ₂O

Device is to SO in the marine exhaust ₂Removal efficiency can reach more than 90%, waste water is treated to satisfy pH value 〉=6.8, the emission standard of greasy dirt≤15ppm.

The above-mentioned shortcoming that the present invention is directed to background technology is improved device, can realize simultaneously the disposal of waste gas waste water., process when realizing waste gas waste water by improving as the basis with washing tower, can control the expense of saving writing for the pollutent of boats and ships.

The invention solves conventional washing tower technology and exist SO ₂To H ₂SO ₄Transformation efficiency is low and need to adopt high-power blower additionally blast air to accelerate SO ₂Oxidation, the H that forms after the simultaneous oxidation ₂SO ₄Must chemical neutralization, therefore produced again the problem of extra sulfur-containing waste water.Utilize vessel Waste, waste water such as boiler blowdown water, sea water desalinating plant sewer is rich in OH ^-, CO ₃ ^2-, HCO ₃ ^-Deng basic anion, above-mentioned waste water is used for SO ₂Absorption and H ₂SO ₄Neutralization, can discharge after the impurity such as greasy dirt need to purify but itself contain.For this problem, the carbon gel coat is set in washing tower, make its catalyzed oxidation SO in liquid phase ₂, accelerate it to H ₂SO ₄Transform, can avoid blasting of additional air, the simplified apparatus save energy; On the other hand, utilize the pore texture of carbon gel coat prosperity, can effectively filter greasy dirt, so that discharged wastewater met the national standard.At last, in same equipment, finished in the waste gas waste water and disposed, adopted alkaline waste water to absorb acid waste gas, realized " treatment of wastes with processes of wastes against one another ", avoided the interpolation of additional absorbent/sorbent material, had excellent economy and environmental benefit.

Claims (8)

1. device of processing simultaneously marine exhaust and waste water, it is characterized in that: it comprises washing tower (1,2), induced draft fan (3), wet-pit (4) and transferpump (5), described washing tower (1,2) set gradually spraying layer (102) in from top to bottom, waste water storage tank (103), be arranged in the carbon gel coat (104) of described waste water storage tank (103), and bubble level (105), described induced draft fan (3) and transferpump (5) are respectively with waste gas, waste water blasts described washing tower (1,2) in, described waste water is through described spraying layer (102) ejection downwards, flow in the described waste water storage tank (103), described waste gas enters in the carbon gel coat (104) in the described waste water storage tank (103) and by described waste water cleaning through described bubble level (102), waste gas after the purification is through described washing tower (1,2) discharge at top, and the waste water in the described waste water storage tank (103) is regularly discharged by described wet-pit (4).

2. the device of processing simultaneously marine exhaust and waste water according to claim 1, it is characterized in that: described device also comprises vapour pipe (9), described vapour pipe (9) is introduced described washing tower (1,2) with steam, described steam enters described carbon gel coat (104) and it is carried out manipulation of regeneration, and described steam cooling pumps by described wet-pit (4).

3. the device of processing simultaneously marine exhaust and waste water according to claim 1, it is characterized in that: described device also comprises recycle pump (106), described recycle pump (106) is used for waste water pump with described waste water storage tank (103) to described spraying layer (102), and from described spraying layer (102) ejection downwards.

4. the device of processing simultaneously marine exhaust and waste water according to claim 1, it is characterized in that: described device also comprises Water Tank (6) and sump pump, described sump pump (7) is used for the sump pump on the boats and ships to described Water Tank (6) storage, with treat described transferpump with described sump pump to described washing tower (1,2).

5. the device of processing simultaneously marine exhaust and waste water according to claim 1, it is characterized in that: described recycle pump (106), sump pump (7) and transferpump (5) are mono-pump, described wet-pit (4) is impeller pump, described induced draft fan is high-temperature centrifugal fan, the working temperature of wherein said induced draft fan (3)≤350 ℃.

6. method of processing simultaneously marine exhaust and waste water is characterized in that: said method comprising the steps of:

Waste gas on the boats and ships and waste water are pumped in the washing tower through induced draft fan, transferpump respectively, wherein said waste gas upwards enters carbon gel coat the waste water storage tank from the bubble level of wash tower bottoms, described waste water flows into described waste water storage tank from the spraying layer ejection at washing tower top;

In the described washing tower, the objectionable constituent in the described waste gas absorbed by described waste water or with described waste water in composition reaction;

Waste gas is after treatment discharged through the washing tower top, and waste water is after treatment regularly discharged by wet-pit.

7. the method for processing simultaneously marine exhaust and waste water according to claim 1, it is characterized in that: described method also comprises to be introduced steam in the washing tower, and enter in the described carbon gel coat by described spraying layer, described steam is used for making described carbon gel coat to recover adsorptive power.

8. the method for processing simultaneously marine exhaust and waste water according to claim 1, it is characterized in that: described method also comprises by recycle pump the waste water pump in the described waste water storage tank to described spraying layer, and spray downwards from described spraying layer, so that waste water circulation uses, until described waste water fully adsorbs the objectionable constituent in the described waste gas and/or fully reacts with the objectionable constituent in the described waste gas.

Images