A kind of have the desulfuration absorbing tower that flow-disturbing holds liquid layer
The utility model relates to a kind of smoke absorption tower for wet process of FGD, and particularly a kind of have the desulfuration absorbing tower that flow-disturbing holds liquid layer, belongs to field of environment protection equipment.
Wet desulfurization of flue gas by limestone-gypsum method technology because its desulfuration efficiency is high, stable, the cheap advantage such as to be easy to get of absorbent, occupy flue gas desulphurization major part market.Absorption tower is main body and the nucleus equipment of wet method fume desulfurizing system, and the performance on absorption tower and cost occupy very important status in desulphurization system designs.According to the difference of gas-liquid contact pattern, the absorption tower of wet desulphurization can be divided into spray column, packed tower, bubble tower, liquid column tower four kinds of patterns.Because spray column structure is simple, operation and maintenance are convenient, gas-liquid contact is good, desulfuration efficiency is high and Application comparison in engineering is ripe, and therefore, spray column is the main flow tower of current sulfur removal technology, and uptake zone generally adopts the mode of hollow-spraying-tower.
Common flue gas spray absorber is slurry pool district, smoke absorption district and except fog-zone from bottom to top successively.Flue gas enters absorption tower from bottom, smoke absorption district, 3-5 layer shower is generally established in uptake zone, multiple atomizer arranged by each shower, and sprayed slurry is atomized backward lower spray through atomizer and drops to slurry pool district with the vaporific of disperse, with smoke contacts mass transfer from bottom to top.Flue gas after gas-liquid contact carries a large amount of drop, by top, absorption tower except the demister of fog-zone retains isolate most of drop after discharge absorption tower.The function of slurry pool accepts and store to absorb slurries, dissolves lime stone, air blast oxidation CaSO
3, crystallization generates gypsum.
In hollow-spraying-tower, gas and slurry liquid contacts have been come by the spraying of absorption tower slurries, and flue gas oppositely contacts in uptake zone with sprayed slurry, the SO in flue gas
2in sprayed slurry, the process of diffusion mass transfer plays key effect to absorption tower desulfuration efficiency.And sprayed slurry is to SO in flue gas
2absorption reaction speed depend on flue gas and slurries relative velocity, effectively mass transfer area, time of contact etc. many factors, fully contact with sprayed slurry for making flue gas, the general pattern adopting Multi-layer sprinkling in engineering, every layer of uniform spraying arranges the mode of large flow nozzle.While desulfurization, the part fine dust in flue gas is also trapped by sprayed slurry, thus realizes certain dust removing effects.
At present, the fluctuation of coal in power plant coal-fired sulfur content is comparatively large, often exceeds desulfurizer design load, meanwhile, country improves further to the discharge standard of coal-burning power plant SO2 and dust, and new " fossil-fuel power plant atmospheric pollutant emission standard " (GB13223-2011) is to SO
2discharge standard significantly improve, particularly in key area, concentration of emission must not more than 50mg/Nm
3even lower, dust emission must not more than 10mg/Nm
3even lower.This proposes very high requirement to the desulfuration efficiency of desulfuration absorbing tower and collaborative dust removing effects, and original desulfurizer faces transformation for increasing productiion capacity, and newly-built desulfurizer needs high, the collaborative good dedusting effect of selective sweetening efficiency, purifies the high desulfur technology of the degree of depth and technique.
The existing high-efficiency desulfurization technology grown up on conventional limestone-gypsum wet sulfur removal technology basis mainly contains single tower Two-way Cycle technology, double-column in series technology, single, double tray technology etc.Single tower Two-way Cycle technology and double-column in series technology have efficient, stable advantage, but shortcoming involves great expense, and improve 40-50% than traditional desulphurization system cost; Single, double tray technology pallet manufacturing process is complicated, and cost is higher, and easily the faults such as blocking occurs.
Utility model content
The utility model technical issues that need to address are for above-mentioned the deficiencies in the prior art, and provide a kind of effectively can improve desulfurized effect and dust removing effects there is the desulfuration absorbing tower that flow-disturbing holds liquid layer.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of have the desulfuration absorbing tower that flow-disturbing holds liquid layer, comprise absorption tower tower body, in the tower body of described absorption tower, there is spraying layer, it is characterized in that: flow-disturbing is set below spraying layer and holds liquid layer, described flow-disturbing is held liquid layer and is comprised the some layers of flow-disturbing layer set gradually up and down, the turbulence columns that every layer of flow-disturbing layer is parallel to each other by many again forms, and many turbulence columns in every layer of flow-disturbing layer are all in same level height and arrange, and two of described turbulence columns is separately fixed on the tower body inwall of absorption tower; Turbulence columns in neighbouring two-layer flow-disturbing layer is parallel to each other and is crisscross arranged.
As further preferred version, hold in liquid layer at flow-disturbing and be evenly distributed multiple module frame, described module frame is by four pieces of risers around forming, and each riser is parallel to airflow direction; Turbulence columns on described flow-disturbing layer is positioned at module frame, and turbulence columns is fixed on riser; Described module frame is arranged the supporting component for being fixed on the tower body of absorption tower.
As further preferred version, described turbulence columns diameter of section is 40mm ~ 100mm, and between two turbulence columns adjacent in every layer of flow-disturbing layer, spacing is 20mm ~ 150mm, and the spacing between neighbouring two-layer flow-disturbing layer is 40mm ~ 150mm.
As further preferred version, the length-width ratio in the rectangular configuration cross section of described module frame is 1:1 ~ 2:1.
As further preferred version, at module frame, alloy porous plate is set near the inwall place of absorption tower tower body.
Compared with prior art, of the present utility model a kind ofly have the desulfuration absorbing tower that flow-disturbing holds liquid layer, spray liquid can form one and hold liquid layer between turbulence columns surface and turbulence columns, rectification is carried out to the flue gas entering absorption tower simultaneously, ensure that the uniformity of smoke distribution on cross section, whole absorption tower, enhance the turbulence intensity of flue gas in uptake zone, enhance gas-liquid mass transfer effect, improve desulfuration efficiency and dust removing effects, specifically there is following beneficial effect:
1. a large amount of absorption slurries fall to flow-disturbing from the spraying layer on top, absorption tower and hold liquid layer, one can be formed between turbulence columns surface and turbulence columns and hold liquid layer, flue gas from turbulence columns gap through holding liquid layer, achieve gas to contact the most closely with slurries, reduce the reaction resistance of gas-liquid two-phase, significantly improve SO
2removal efficiency, also greatly strengthen the trapping effect to fine solid particle simultaneously.
2. flow-disturbing is held liquid layer and is carried out rectification to the flue gas entering absorption tower, ensure that the uniformity of smoke distribution on cross section, whole absorption tower, thus makes flue gas all optimised with contacting in whole absorption region of slurries, improves overall desulfuration efficiency and dust removing effects.
3., because flue gas is holding liquid layer constriction in flow area through flow-disturbing, flue gas flow rate is accelerated, thus enhances the turbulence intensity of flue gas in uptake zone, enhances gas-liquid mass transfer effect, improves desulfuration efficiency and dust removing effects.
4. hold liquid layer due to column flow-disturbing and effectively improve desulfurization and dust removing effects, reaching under same efficiency requirements, decreasing loop slurry weight, significantly reducing system power consumption.
5. cylinder surface not easily gathers serous granule, avoids clogging, manufactures simultaneously, installation and maintenance is all comparatively easy.
Accompanying drawing explanation
Fig. 1 is absorption tower tower body schematic internal view;
Fig. 2 is the structural representation of module frame;
Fig. 3 is flow-disturbing layer top view;
Fig. 4 is alloy porous plate and module frame position relationship schematic diagram;
Wherein, 1-absorption tower tower body, 2-spraying layer, 3-flow-disturbing layer, 4-turbulence columns, 5-module frame, 6-supporting component, 7-alloy porous plate.
Detailed description of the invention
Optimal technical scheme of the present utility model is described in detail below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of flow-disturbing desulfuration absorbing tower of the present utility model, comprise absorption tower tower body 1, in described absorption tower tower body 1, there is spraying layer 2, below spraying layer 2, arrange flow-disturbing hold liquid layer, described flow-disturbing is held liquid layer and is comprised the some layers of flow-disturbing layer 3 set gradually up and down, and every layer of flow-disturbing layer 3 is made up of the many turbulence columns be parallel to each other 4 again, many turbulence columns 4 in every layer of flow-disturbing layer 3 are all in same level height and arrange, and two of described turbulence columns 4 is separately fixed on absorption tower tower body 1 inwall; Turbulence columns 4 in neighbouring two-layer flow-disturbing layer 3 is parallel to each other and is crisscross arranged, and the turbulence columns 4 namely in lower floor's flow-disturbing layer 3 remains at below the gap between adjacent two turbulence columns 4 in upper strata flow-disturbing layer 3; Containing SO
2introduce in absorption tower from gas approach with the flue gas to be clean of fine dust, contact with the atomization slurry sprayed from spraying layer 2 is reverse, make the SO in flue gas
2be absorbed by liquid absorption, fine dust is captured simultaneously.Flow-disturbing layer 3 is arranged in the uptake zone between gas approach and spraying layer 2.The number of plies of flow-disturbing layer is 2 ~ 4 layers, is advisable with 3 layers.
Further, hold in liquid layer be evenly distributed multiple module frame 5 at flow-disturbing, described module frame 5 is by four pieces of housings around forming, and housing is the riser structure being parallel to airflow direction, and its cross section is rectangular configuration; During installation module framework 5, the turbulence columns on every layer of flow-disturbing layer 34 is arranged in module frame 5, and turbulence columns 4 is fixed on housing; Described module frame 5 is arranged the supporting component 6 for being fixed on absorption tower tower body 1; The length-width ratio in the rectangular configuration cross section of described module frame 5 is 1:1 ~ 2:1.
Further, described turbulence columns 4 diameter of section is 40mm ~ 100mm, and between two turbulence columns 4 adjacent in every layer of flow-disturbing layer 3, spacing is 20mm ~ 150mm, and the spacing between neighbouring two-layer flow-disturbing layer 3 is 40mm ~ 150mm.
At module frame 5, alloy porous plate 7 is set near the inwall place of absorption tower tower body 1, alloy porous plate 7 is as the filling of module frame 5 at absorption tower tower body 1 inward flange, the flue gas of limit wall portion can be made to obtain effective rectification on the one hand, a large amount of absorption slurries also define one at tapping and hold liquid liquid film simultaneously, thus make flue gas realize SO when holding liquid liquid film through this
2effective absorption and effective trapping of fine dust.
Although the utility model describes as above with aforesaid example, it can not in order to limit the utility model.Those of ordinary skill in the utility model art, not departing from spirit and scope of the present utility model, does a little change and modification, all in protection domain of the present utility model.Therefore protection domain of the present utility model is when being as the criterion with the claim person of defining.