CN203469797U - Desulfurizing absorption tower comprising perforated distributor - Google Patents
Desulfurizing absorption tower comprising perforated distributor Download PDFInfo
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- CN203469797U CN203469797U CN201320505592.3U CN201320505592U CN203469797U CN 203469797 U CN203469797 U CN 203469797U CN 201320505592 U CN201320505592 U CN 201320505592U CN 203469797 U CN203469797 U CN 203469797U
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Abstract
The utility model discloses a desulfurizing absorption tower comprising a perforated distributor, relating to environmental protection equipment. The desulfurizing absorption tower comprises a tower tube (1), wherein an absorption tower inlet (2), spray layers (3), demisters (4), an absorption tower outlet (5) and a perforated distributor (6) are installed inside the tower tube (1); the perforated distributor (6) is arranged between a second spray layer (32) and a third spray layer (33); the perforated distributor (6) comprises a plurality of support beams (7) and a plurality of perforated plates (61) which are arranged in an array and are assembled into a disk; the upper parts at the two ends of the perforated plates (61) are connected with locating plates (62); the adjacent perforated plates (61) are connected by the locating plates (62); the support beams (7) are arranged at the lower ends of joints (63) of the adjacent perforated plates (61). The desulfurizing absorption tower has a simple structure, is convenient to overhaul, reduces the circulating spray quantities of the spray layers and can effectively reduce the construction and operating costs of desulfurizers, and the value of liquid/steam in the desulfurizing absorption tower is relatively small.
Description
Technical field
The utility model relates to a kind of environmental protection equipment, specifically a kind of desulfuration absorbing tower that contains porous distributor.
Background technology
The acid rain that sulfur dioxide forms is the serious harm mankind's living environment, and state compulsion requires thermal power plant that flue gas desulfur device is installed.In recent years, affected by domestic electric coal supply present situation, a lot of power plant's coals source is unstable, and the coal-fired sulfur content of new supply is higher.And national up-to-date promulgation thermal power plant standard limit of smog release, to SO
2concentration of emission proposes stricter requirement.
Existing desulfurization unit can not meet the demands because of desulfuration efficiency, and desulphurization system transformation is imperative.New-built unit requires more and more higher to the efficiency of detachment system and safe operation.
In order to prevent the flue gas bias current in desulfuration absorbing tower, existing technical scheme is that the spraying layer with nozzle is improved.But, when the spraying layer to nozzle improves, in the design of spraying layer, need to take into full account the impact that the inhomogeneous flue gas of flow velocity brings.Because of flue gas flow rate in tower in same cross section flow velocity be inhomogeneous, some regions flow velocity is high, some regions flow velocity is low, therefore prior art is in the high region of gas flow rate, arranges nozzle more, in the low region of gas flow rate, arranges less nozzle as far as possible.
There is following defect in technique scheme: 1. existing desulfuration absorbing tower needs the gas flow model of Erecting and improving to optimize the layout of nozzle, so that flue gas flow velocity in absorption tower is even; 2. existing desulfuration absorbing tower need adopt the nozzle of a greater number at every layer of spraying layer, and therefore, the liquid/gas in existing desulfuration absorbing tower keeps high value for a long time, and this makes the efficiency of desulfuration absorbing tower lower.
Summary of the invention
The purpose of this utility model is in order to overcome the weak point of above-mentioned background technology, and a kind of desulfuration absorbing tower that contains porous distributor is provided.
To achieve these goals, the technical solution of the utility model is: the desulfuration absorbing tower that contains porous distributor, comprise tower cylinder, described tower cylinder inside is provided with absorption tower entrance, spraying layer, demister from bottom to top successively, and absorption tower outlet, it is characterized in that: described tower cylinder inside is also provided with porous distributor; Described spraying layer comprises the first spraying layer, the second spraying layer and the 3rd spraying layer of arranging from bottom to top, and described demister is two-stage demister; Described porous distributor is between the second spraying layer and the 3rd spraying layer; Porous distributor comprises many brace summers, and is a plurality ofly arranged in arrays and is assembled into discoid porous plate; The top, two ends of described porous plate is connected with location-plate, between adjacent porous plate, by described location-plate, connects, and described brace summer is positioned at the lower end, junction of adjacent porous plate.
In technique scheme, operation principle of the present utility model and working effect are as follows:
A. flue gas and slurries increase time of contact, in absorption tower, except gas must contact with slurries, also need in enough alkaline matters and the slurries of absorption tower inner acidic.In practical work process, this alkaloid substance is the calcium carbonate in lime stone normally.The pH value of on-line measurement absorption tower slurries has reflected the dissolution degree of calcium carbonate, and pH value increases, and represents that the basicity of dissolving increases, and desulphurizing ability is also increasing.PH value is a kind of means of reacting stock tank solution or being ejected into the loop slurry alkalescence measurement of flue gas, the SO in during the basicity of this dissolving is not enough to and uptake zone
2so,, if can increase the meltage of lime stone during real work, will improve the desulfuration efficiency of desulfuration absorbing tower.
Long-term practice shows, the amount that lime stone dissolves in uptake zone depends on the time that slurries stop in uptake zone.Therefore, on the tower cylinder of desulfuration absorbing tower, installed after porous distributor, will increase the time of contact between flue gas and slurries, so just for uptake zone provides more alkaline dissolving machine meeting, and then improve the desulfuration efficiency on absorption tower.
B. in real work, acid solution, when flowing through porous distributor, can form one deck liquid film on porous distributor, the liquid film that porous distributor place is held can play certain cushioning effect, when flue gas load changes to some extent, make the smooth operation on absorption tower, be difficult for causing SO
2the fluctuation of removal efficiency.
C. airflow uniform distribution, in real work, flue gas can be entered by absorption tower entrance, and enters porous distributor.Arrange after porous distributor, gas flow rate in absorption tower has obtained good uniform effect, most of gas flow rate is within the scope of mean flow rate, and with respect to prior art, the inhomogeneous situation of gas flow rate in desulfuration absorbing tower described in the utility model improves significantly.
D. the utility model, after porous distributor is set, can make absorption tower operation maintenance convenient.When the spraying layer of maintenance porous distributor top, do not need slurries in tower all emptying, then in tower, build ad hoc inspection and repair platform, operation maintenance personnel stand on porous distributor and just can tower internals be safeguarded and be changed, the maintenance time while reducing operation.
The top, two ends of described porous plate is connected with respectively the first highly higher location-plate, and the second highly lower location-plate, and the first location-plate is 7 templates, and described the second location-plate is dull and stereotyped.
In technique scheme, when the first location-plate is 7 templates, and described the second location-plate is while being dull and stereotyped, and the utility model is installed more convenient, fast.
The upper end of described porous plate is connected with stiffener, and the top, two ends of described porous plate is connected with respectively the first highly higher location-plate, and the second highly lower location-plate, and described stiffener two ends are connected with the second location-plate with the first location-plate respectively.Described stiffener is 7 templates.
In technique scheme, stiffener can increase the rigidity of structure of porous plate, thereby makes structure of the present utility model more stable.
Described a plurality of porous plate comprises the first porous plate and second porous plate of adjacent layout, the top, two ends of porous plate is connected with respectively the first highly higher location-plate, the second highly lower location-plate, the first location-plate on described the first porous plate is connected with the second location-plate on the second porous plate.
In technique scheme, the first location-plate on the first porous plate is when the second location-plate on the second porous plate is connected, and structure of the present utility model is more attractive in appearance, maintenance and install also more convenient.
On described brace summer, be set with sleeve.
In technique scheme, sleeve adopts corrosion-resistant material to make conventionally.The sleeve being sleeved on brace summer can play certain protective effect to brace summer, can extend the life-span of brace summer, and then can improve service life of the present utility model.
The percent opening of described porous plate is 35～40%.When the percent opening of porous plate is 35～40%, the utility model has not only reduced the resistance at porous distributor place, and due to the raising of percent opening, also there will not be clogging.
To sum up, desulfuration efficiency of the present utility model can reach 98% very easily, or even reaches 99%; Meanwhile, the utility model is simple in structure, and maintenance is convenient, and the value of the liquid/vapour in desulfuration absorbing tower is less, and has reduced the circulated sprinkling amount of spraying layer, can effectively reduce desulfurizer and build and operating cost.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the top view of porous distributor.
Fig. 3 is the A-A cutaway view of Fig. 2.
Fig. 4 is the B-B cutaway view of Fig. 2.
Fig. 5 is the C-C cutaway view of Fig. 2.
Fig. 6 is the D-D cutaway view of Fig. 2.
Fig. 7 is the E-E cutaway view of Fig. 2.
Fig. 8 is the structural representation of porous plate described in the utility model.
1-tower cylinder in figure, 2-absorption tower entrance, 3-spraying layer, 4-demister, the outlet of 5-absorption tower, 6-porous distributor, 61-porous plate, 611-the first porous plate, 612-the second porous plate, 62-location-plate, 621-the first location-plate, 622-the second location-plate, the junction of the porous plate that 63-is adjacent, 7-brace summer, the sleeve on 71-brace summer, 8-stiffener.
The specific embodiment
Below in conjunction with accompanying drawing, describe performance of the present utility model in detail, but they do not form to restriction of the present utility model, only for example.By explanation, make advantage of the present utility model more know and easily understand simultaneously.
Consult accompanying drawing known: the desulfuration absorbing tower that contains porous distributor, comprise tower cylinder 1, described tower cylinder 1 inside is provided with absorption tower entrance 2, spraying layer 3, demister 4 from bottom to top successively, and absorption tower outlet 5, it is characterized in that: described tower cylinder inside is also provided with porous distributor 6; Described spraying layer comprises the first spraying layer 31, the second spraying layer 32 and the 3rd spraying layer 33 of arranging from bottom to top, and described demister 4 is two-stage demister; Described porous distributor 6 is between the second spraying layer 32 and the 3rd spraying layer 33; Porous distributor 6 comprises many brace summers 7, and is a plurality ofly arranged in arrays and is assembled into discoid porous plate 61; The top, two ends of described porous plate 61 is connected with location-plate 62, between adjacent porous plate 61, by described location-plate 62, connects, and described brace summer 7 is positioned at 63 lower ends, junction of adjacent porous plate 61.
The top, two ends of described porous plate 61 is connected with respectively the first highly higher location-plate 621, and the second highly lower location-plate 622, the first location-plates 621 are 7 templates, and described the second location-plate 622 is dull and stereotyped.
The upper end of described porous plate 61 is connected with stiffener 8, and described stiffener 8 two ends are connected with the second location-plate 622 with the first location-plate 621 respectively.The priority scheme of stiffener 8 is for being 7 templates.Stiffener 8 can increase the rigidity of structure of porous plate
Described a plurality of porous plate 61 comprises the first porous plate 611 and second porous plate 612 of adjacent layout, in practical work process, with the first location-plate 621 on described the first porous plate 611 and the second location-plate 622 on the second porous plate 612, be connected to preferred plan of the present utility model.
On described brace summer 7, be set with sleeve 71.Sleeve 71 adopts corrosion-resistant material to make conventionally.The sleeve 71 being sleeved on brace summer 7 can play certain protective effect to brace summer 7, can extend the life-span of brace summer 7, and then can improve service life of the present utility model.
The percent opening of described porous plate 61 is 35～40%.The material of porous plate 61 generally adopts UNSS32205 or is equal to alloy material, and the thickness of porous plate 61 is advisable to be not less than 2mm.Porous distributor in absorption tower can be arranged in the below of spraying layer 3 as required.
In practical work process, porous distributor sizing liquor pH value is lower than the value of the reaction chamber in absorption tower, for example, if the pH value of reaction chamber is 5.6, on porous distributor, may be 4.2, in lime stone dissolution rate and slurries, hydrogen ion concentration is directly proportional, and at pH value, is 4.2 o'clock, and hydrionic concentration ratio pH value is to exceed 28 times at 5.6 o'clock.Therefore, the dissolution velocity of lime stone on porous distributor is than faster on reaction chamber.
In practical work process, the method for operation of the present utility model is:
A. flue gas rises after entering absorption tower;
B. the formed slurries of limestone/gypsum are delivered to the atomizer of each spraying layer by circulating pump, and to the hood-like injection of absorption tower below mist formation, thereby form the spray district that liquid mist height superposes, now, slurries drop fast-descending;
C. evenly rise flue gas and fast-descending slurries form reverse flow, and therefore the dusty gas overwhelming majority contained in flue gas is cleaned into slurries, are removed with suspension lime stone particulate generation chemical reaction in slurries.
The utility model passes through using lime stone as absorption reaction agent, thereby makes the SO in flue gas
2, SO
3, HCI and HF are separated, and the most solid comprising in flue gas is as ash and cigarette ash, also separated from flue gas by liquid wash.Now the wet flue gas after washing desulphurization purifies is removed after most of drop by being arranged on the demister 4 at top, absorption tower, by absorption tower outlet 5, is drawn, and through chimney, enters atmosphere.
In the slurries of absorption tower, pH value is chosen between 5 to 6, if pH value surpasses this value, absorption tower has scale problems and occurs; If pH value is lower than this value, the absorbability of slurries declines, and finally has influence on SO
2removal efficiency and by-produced gypsum quality.
Spraying layer is arranged on the upper smoke gas area on absorption tower.Every circulating pump is corresponding to one deck spraying layer separately, and nozzle adopts the empty cone of the rotation atomizer of the splendid SiC material of anti-wear performance.Circulating pump is transported to nozzle by slurries, by nozzle, slurries is compactly sprayed to flue gas district.
Absorption tower top arranges the demister 4 of a two-stage, and demister 4 by most of slurries drop separation of carrying secretly in flue gas out.Exhanst gas outlet is less than 75mg/Nm3 containing droplet.Demister 4 is controlled by cleaning procedure, and backwashing manner is pulsed.What demister 4 used when rinsing is fresh water (FW), rinse and have two objects, and be to prevent demister fouling on the one hand, be to supplement the moisture content of taking away because flue gas is saturated on the other hand, to maintain the liquid level requiring in absorption tower.
In order to further illustrate advantage of the present utility model, first prior art is described further: flue gas can be subject to resistance in absorption tower, in addition, the materials such as the gypsum in slurries also likely produce deposition at porous distributor place, cause the obstruction on absorption tower.The problem that prior art easily stops up in order to solve absorption tower, existing absorption tower is to adopt percent opening to account for 15～25% long-pending column plate of tower section, and in existing absorption tower, flue gas flow rate is generally 3.4～4m/s, and the resistance on absorption tower will reach 0.4～0.7kPa.
The utility model is that the steam by rising is realized through the liquid pool on porous distributor, the utility model is after having taken into full account the characteristic of slurries itself, the percent opening of the porous distributor in absorption tower is brought up to 35～40%, such design has not only reduced the resistance at porous distributor place, and due to the raising of percent opening, also there will not be clogging.
Porous distributor material is selected the corrosivity of medium in Main Basis absorption tower, and corrosive medium is for several below conventionally: gypsum crystal particle, limestone particle, SO
4 2-, SO
3 2-, Cl
-, F
-deng, the H of nascent state particularly
2sO
3, H
2sO
4, HF, HCl be the main body that causes equipment corrosion, so the material of porous distributor selects upper wanting can effectively prevent above-mentioned various corrosion factor, according to operating experience, the material of porous distributor generally adopts UNSS32205 or is equal to alloy material.
For advantage of the present utility model can be more clearly described, the 1 * 300MW unit of certain routine of take below contrasts the utility model and prior art as example, and its comparing result is as following table:
As can be known from the above table, adopt spray void tower and porous distributor can reach higher desulfurization degree, porous distributor is than spray void tower desulphurization system saving investment 530,000.Because spray void tower is structural type device, operation maintenance amount is very little, can save later stage expense.
Other unaccounted part all belongs to prior art.
Claims (7)
1. the desulfuration absorbing tower that contains porous distributor, comprise tower cylinder (1), described tower cylinder (1) inside is provided with absorption tower entrance (2), spraying layer (3), demister (4) from bottom to top successively, and absorption tower outlet (5), it is characterized in that:
Described tower cylinder inside is also provided with porous distributor (6);
Described spraying layer comprises the first spraying layer (31), the second spraying layer (32) and the 3rd spraying layer (33) of arranging from bottom to top, and described demister (4) is two-stage demister;
Described porous distributor (6) is positioned between the second spraying layer (32) and the 3rd spraying layer (33);
Porous distributor (6) comprises many brace summers (7), and is a plurality ofly arranged in arrays and is assembled into discoid porous plate (61);
The top, two ends of described porous plate (61) is connected with location-plate (62), between adjacent porous plate (61), by described location-plate (62), connect, described brace summer (7) is positioned at the lower end, junction (63) of adjacent porous plate (61).
2. the desulfuration absorbing tower that contains porous distributor according to claim 1, it is characterized in that: the top, two ends of described porous plate (61) is connected with respectively highly higher the first location-plate (621), highly lower the second location-plate (622), the first location-plate (621) is 7 templates, and described the second location-plate (622) is dull and stereotyped.
3. the desulfuration absorbing tower that contains porous distributor according to claim 1, it is characterized in that: the upper end of described porous plate (61) is connected with stiffener (8), the top, two ends of described porous plate (61) is connected with respectively highly higher the first location-plate (621), highly lower the second location-plate (622), described stiffener (8) two ends are connected with the second location-plate (622) with the first location-plate (621) respectively.
4. the desulfuration absorbing tower that contains porous distributor according to claim 3, is characterized in that: described stiffener (8) is 7 templates.
5. the desulfuration absorbing tower that contains porous distributor according to claim 1, it is characterized in that: described a plurality of porous plates (61) comprise the first porous plate (611) and second porous plate (612) of adjacent layout, the top, two ends of porous plate (61) is connected with respectively highly higher the first location-plate (621), highly lower the second location-plate (622), the first location-plate (621) on described the first porous plate (611) is connected with the second location-plate (622) on the second porous plate (612).
6. the desulfuration absorbing tower that contains porous distributor according to claim 1, is characterized in that: on described brace summer (7), be set with sleeve (71).
7. the desulfuration absorbing tower that contains porous distributor according to claim 1, is characterized in that: the percent opening of described porous plate (61) is 35～40%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320505592.3U CN203469797U (en) | 2013-08-19 | 2013-08-19 | Desulfurizing absorption tower comprising perforated distributor |
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|---|---|---|---|
| CN201320505592.3U CN203469797U (en) | 2013-08-19 | 2013-08-19 | Desulfurizing absorption tower comprising perforated distributor |
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| CN203469797U true CN203469797U (en) | 2014-03-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107812446A (en) * | 2016-09-14 | 2018-03-20 | 方惠娥 | A kind of chimney exhaust gas desulfurization water mist sprinkling device |
-
2013
- 2013-08-19 CN CN201320505592.3U patent/CN203469797U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107812446A (en) * | 2016-09-14 | 2018-03-20 | 方惠娥 | A kind of chimney exhaust gas desulfurization water mist sprinkling device |
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Granted publication date: 20140312 |
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