CN2597065Y

CN2597065Y - Double-loop repeat contacting process wet-desulfurizing device

Info

Publication number: CN2597065Y
Application number: CNU032269242U
Authority: CN
Inventors: 廖太升
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-02-13
Filing date: 2003-02-13
Publication date: 2004-01-07
Anticipated expiration: 2013-02-13

Abstract

The utility model relates to a double circuit repetitive contacting flow wet desulphurization device which is used to remove the sulfur dioxide in various coals or fuels. The device is composed of a concrete base 1, a counter-current tower 2, a downstream tower 3 and a reaction tank 4. The outstanding characteristics of the device is that a special nozzle 10 is provided in the absorption desulfuration zone one in the downstream tower 3; a Stage one demister 12 and a Stage two demister 14 are provided in the dewatering and demisting zone two of the downstream tower 3; a reaction mixer 8 is arranged on the top of the reaction tank 4 and an air distributor 6 is arranged in the reaction mixer; a special nozzle 9 is arranged in the counter-current tower 2 and an external heat exchange is arranged outside of the system.

Description

The flow process wet desulphurization device is repeated to contact in the double loop

The utility model belongs to a kind of various fire coals (oil) wet flue gas desulfurizer that is applicable to.Be generally used for lime (the stone)-gypsum wet desulfurization of desulfurization, no matter be autoxidation, or forced oxidation, all existing calcium sulfite to some extent, the calcium sulfate scaling problem need take certain technological measure to be avoided.

The purpose of the utility model patent will overcome the defective of desulfur technology in the past exactly, and a kind of no fouling existence condition is provided, and no clogging produces, and floor space is few, reduced investment, economical and practical, the flue gas desulfurization technique that desulfuration efficiency is high.

Technical solutions of the utility model and structure accompanying drawings are as follows:

Fig. 1 is a structural representation of the present utility model

Fig. 2 is that A of the present utility model is to view

Fig. 3 is a process chart of the present utility model

As shown in Figure 1, 2, the utility model mainly is by concrete substrate 1, is built in the adverse current on the matrix 1 Tower body 2, following current tower body 3, reactive tank 4 and outside flue gas heat exchanger 17 form. Following current tower body 3 is by lower Supreme Absorption Desulfurization district I, the demist drying zone II of being divided into, the exhanst gas outlet 15 on demist drying zone top is with outside Heat exchanger 17 tops link to each other. Arrow represents the smoke movement direction among the figure, and this device inside is provided with limewash and enters Mouth 5, oxidation air uniform device 6, limewash outlet 7, reaction stirrer 8, special nozzle 9, special nozzle 10, mist eliminator flushing device 11, one-level demister 12, rinse water entrance 13, secondary demister 14, cigarette Road gas entrance 16, cooling water inlet 18, coolant outlet 19, circulating pump suction inlet 20, oxidation air enters Mouth 21, circulating pump pump discharge 22.

The principal character of the utility model Double-loop repeat contacting process wet-desulfurizing device is that coal-fired (oil) flue gas temperature after heat-exchanging loop (seeing accompanying drawing 3 process charts) cooling is to be suitable for SO about 60 ℃₂Absorption, simultaneously also can slough the part dust, enter in the countercurrent tower 2, the reverse contact of the vaporific absorption liquid of cylindricality that ejects with special nozzle 10, and with spray after the drop of sprinkling again contact when landing in the same way, time of contact is longer, has improved SO₂Absorption efficiency, thereafter, flue gas is turned back 90 °, the following current tower body 3 of flowing through from bottom to top is with the spy The vaporific absorption liquid of cylindricality that different nozzle 9 upwards ejects is for the third time contact in the same way, and drenches the liquid of falling with injection Drip reverse the 4th time and repeat contact. Through repeatedly repeating contact, the air-flow contact is more abundant, the desulfuration efficiency utmost point The big raising. SO in the flue gas₂Fully effectively removed, the flue gas after the desulfurization continues to rise, and removes at I and II Under the synergy of day with fog, the moisture in the flue gas is fully taken off dried, enters external heat exchanger 17 and enters heating More than 80 ℃, discharge chimney.

(second loop, absorption output loop of flow process wet desulphurization device is repeated to contact in the utility model double loop, see technological process Fig. 3), be through special nozzle 9, (zone line is wellatomized fine particle to the vaporific absorption liquid of 10 cylindricalitys that upwards eject, upwards the fluid column of high velocity jet also can entrainment gas simultaneously, forms the turbulent fluctuation froth zone) with flue gas in SO ₂After the reaction, generate calcium sulfite, flow into the reactive tank 4 of bottom, the air generation oxidation reaction by air intake 21 is come in generates calcium sulfate (CaSO ₄2H ₂O), wherein a part is carried out Separation of Solid and Liquid through parget water outlet 7 hydrocyclones that pump among technological process Fig. 3, become commercial gypsum after the drying, the mixing tank diameter of the clear liquid injection technology flow chart 3 after the separation, wherein major part then pumps into special nozzle 9 by the absorption liquid circulating pump, 10 eject, to the SO in the flue gas ₂Repeating contact absorbs.

The utility model desulfurization degree＞98%, oxygenation efficiency＞99%.

The utility model double loop is repeated to contact the flow process wet desulphurization device and is had following characteristics:

1) because employing repeats to contact flow process, and having has sweetening process twice in the device, gas-liquid contact reaction is abundant, has improved desulfuration efficiency.

2) apparatus structure simple (airless limiting member), the operation operation is convenient, and expense is low.

3) Jiang Luo liquid has from flushing action, does not have the gas-liquid limiting member again simultaneously, does not exist and stops up and fouling.

4) energy-saving and water-saving (recirculated water＞97%) is saved wear-resisting, the corrosion resistant of metal material (tower body can be used numb stone), long service life.

5) non-secondary pollution can be turned waste into wealth, and produces high-quality gypsum product.

Claims

1, the flow process wet desulphurization device is repeated to contact in a kind of double loop, comprise concrete substrate 1, be built in the countercurrent tower 2 of concrete bodies 1, following current tower body 3, reactive tank 4, form with external heat exchanger 17, described following current tower 3 is divided into absorption desulfurization zone I from the bottom to top, demist drying zone II is characterized in that the absorption desulfurization zone I of following current tower body 3 is provided with special nozzle 10, is provided with one-level demister 12 at the demist drying zone II of following current tower body 3, secondary demister 14, reactor 4 tops are provided with reaction stirrer 8, and its underpart is provided with oxidation air distributor 6, are provided with special nozzle 10 in the adverse current tower body 2.

2, require described double loop to repeat to contact the flow process wet desulphurization device according to right 1, it is characterized in that described agitator 8 can establish individual layer, also can establish multilayer.

3, require described double loop to repeat to contact wet desulphurization device according to right 2, it is characterized in that described oxidation air distributor 6 can be garden shape pipe group, but also biexhaust pipe group.

4, require described double loop to repeat to contact wet desulphurization device according to right 3, it is characterized in that described one-level demister 12, secondary demister 14 can also can vertically be installed in the level installation.

5, require described double loop to repeat to contact wet desulphurization device according to right 4, the described flue gas heat exchanger 17 of its feature is external shell and tube or is heat pipe-type.

6) require described double loop to repeat to contact wet desulphurization device according to right 5, the described special nozzle 9,10 of its feature is established many groups.