CN2241011Y - Industrial flue gas sea water desulfurizing water quality restoration apparatus - Google Patents

Abstract

The utility model relates to an industrial flue gas sea water desulfurizing water quality restoration apparatus which is a water quality restoration apparatus after the flue gas drained by an industrial combustion apparatus is desurfurized. The utility model comprises a clarifying tank, an aeration path and a blower. The aeration path is a tube, and the air outlet of the aeration path is positioned in an aeration basin. In conformity with the requirement environmental protection, the utility model has the advantages of low cost, low operation cost, high efficiency in recovering water quality and no new pollution.

Description

Industrial smoke sea water desulfuration quality recovery device

The utility model relates to industrial smoke sea water desulfuration quality recovery device; the environmental protection technical field that belongs to industrial flue gas cleaning; be suitable for eliminating the SO that can cause acid rain to take place that contains in the combustion apparatus institute discharged flue gas of some commercial plants as fire coal, oil burning boiler, particularly thermal power plant ₂Use during Deng the seawer washing flue gas of acidic materials.

Because the needs of environmental protection, industrial burning device institute discharged flue gas must remove wherein a part or most of SO before entering atmosphere ₂, be commonly referred to flue gas desulfurization technique, i.e. FGD technology.Though most of FGD process systems can remove the SO in the flue gas preferably ₂, but the high and SO of its cost ₂The operating cost that factor such as absorbent and byproduct causes is also very high, is that enterprise brings heavy financial burden because of the needs of environmental protection often, forms the contradiction of environmental benefit and economic benefit.At present, existing a kind of abroad seawer washing flue gas that utilizes in the high area of latitude is to remove SO in the flue gas ₂Technology, but all be with the washing after acid seawater directly enter the deep-sea.The condition of this technology is: the seawater water temperature at deep-sea is low, and its dissolved oxygen index height can be with acid seawater oxidation and dilution, and simultaneously, local environment protectment protection is not given with system.But this technology can't be used for that the such latitude of China is relatively low, the corresponding higher area of seawater water temperature, and China environmental protection department does not allow the acid seawater of pH＜6.5 directly to enter marine yet.

The purpose of this utility model is, the shortcoming that does not have the mixing seawater quality recovery discharge standard that a kind of equipment can the row of making sea that overcomes that existing fume desulphurization method exists, for being located in the commercial plant of coastal area, as thermal power plant etc., provide a kind of and can utilize seawater resources, the flue gas of discharging is carried out efficiently, during desulfurization at low cost, makes the seawater that participates in desulfurization enter the quality recovery device that does not cause new pollution after marine.

Industrial smoke sea water desulfuration quality recovery device of the present utility model technical scheme be; It comprises clarifier-tank, aeration passage, and air blast; Clarifier-tank comprises sea water mixing district and aeration zone; The outlet of aeration passage is arranged in the aeration zone.

Accompanying drawing of the present utility model and being described as follows:

Fig. 1, look schematic diagram for the master of the utility model device:

Fig. 2, be the utility model schematic top plan view;

Fig. 3, be that the utility model connects figure with seawer washing flue gas equipment,

Among the figure: 1, sea water pump, 2, chimney, 3, scrubbing tower, 4, deduster, 5, burner, (as boiler) 6, clarifier-tank, 6 ', the sea water mixing district, 6 ", the aeration zone, 7, acid sea intake, 8, do not absorb SO ₂Seawater mixes mouth, and 9, the aeration passage, 10, mix seawer outlet, 11, air blast.

Operation principle of the present utility model is: extracting seawater technology is to realize that by water intaking pump (1) or by flowing into the combustion apparatus refrigerated sea water this seawater is spray washing in scrubbing tower (3), flows through the flue gas of this tower.Be washed SO ₂directly enter atmosphere in clean flue gas by chimney (2).Washed SO ₂After seawater because the SO that dissolves in ₂The back generates SO ₃ ⁼Or SO ₃ ^2-And being acid, its pH value can reach below 3.At this moment acid seawater must be handled, wherein unsettled SO ₃ ⁼Be oxidized to stable and harmless SO ₄ ⁼, and its pH value returned to the ambient water quality same degree just can enter natural environment, as the sea, otherwise one comes not allowed by the standard of water body environment protection, and two owing to SO ₃ ⁼Instability still can discharge SO ₂All that has been achieved is spoiled and make the effort of atmospheric environment protection.For this reason, adopt this device, wherein must will absorb SO ₂Acid seawater with do not absorb SO ₂Seawater blending in the mixed zone (6 ') of clarifier-tank (6) reaches more than 5.5 its pH value, enters aeration zone (6 "), and blast a large amount of air by air blast (11) and aeration passage (9) in the seawater that mixes in this district, i.e. aeration then.Locate at mixing seawer outlet (10), its pH value can reach more than 6.5, and the increment of COD value can reach below 5 mg/litre.

That the utility model is described in further detail is as follows with accompanying drawing in conjunction with the embodiments: the utility model includes clarifier-tank (6), sea water mixing district (6 ') and aeration zone (6 "), aeration passage (9) and air blast (11).Clarifier-tank (6) divides sea water mixing district and aeration zone, its aeration zone (dischargeable capacity of 6 ") be used for desulfurization, promptly mix the total flow of seawater and the product of aeration time; Aeration passage (9) has some ventholes for pipe, and its outlet is positioned at the aeration zone (among 6 ").The sea water mixing district (6 ') of one end of aerator, there is acid seawater inlet port (7) its underpart, and (6 "), its top have the seawer outlet (11) that has reduced acidity, do not absorb SO in the aeration zone of the other end ₂The outlet (8) of seawater be positioned at acid seawater inlet (7) nearby.

The utility model has the advantage of that after purifying through clarifier-tank, quality recovery has namely washed SO to the environmental protection standard level₂Acid seawater, its pH value reaches below 3, enters the mixed zone The pH value goes back up to more than 5.5 after mixing, and behind the air that exposes to the sun, the mixing seawater of discharge can satisfy p H 〉=6.5, the requirement of the environmental protection aspect of COD increment≤5mg/l. Material of the present utility model Material can be that steel or cement are tied 11 structures, and cost and operating cost are low.

Claims (2)

1, a kind of industrial smoke sea water desulfuration quality recovery device is characterized in that it comprises clarifier-tank, aeration passage, and air blast; Clarifier-tank comprises sea water mixing district and aeration zone; The gas outlet of aeration passage is arranged in the aeration zone.

2, device according to claim 1 is characterized in that, there is acid seawater inlet port its underpart, sea water mixing district of clarifier-tank one end, does not absorb SO ₂The inlet of seawater is positioned near the inlet port of acid seawater, and the seawer outlet that has reduced acidity is arranged at its top, the aeration zone of the other end.

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