CN1428187A - Solid-gas recirculating semi-dry flue gas desulfurizing and dust-removing integrated system - Google Patents

Solid-gas recirculating semi-dry flue gas desulfurizing and dust-removing integrated system Download PDF

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Publication number
CN1428187A
CN1428187A CN 01144926 CN01144926A CN1428187A CN 1428187 A CN1428187 A CN 1428187A CN 01144926 CN01144926 CN 01144926 CN 01144926 A CN01144926 A CN 01144926A CN 1428187 A CN1428187 A CN 1428187A
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CN
China
Prior art keywords
flue gas
dust
ash
reactor
solid
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CN 01144926
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Chinese (zh)
Inventor
熊天渝
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熊天渝
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Priority to CN 01144926 priority Critical patent/CN1428187A/en
Publication of CN1428187A publication Critical patent/CN1428187A/en

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Abstract

The solid-gas recirculating semi-drying flue gas desulfurization and dust-removing integrated system is characterized by that its desulfurization absorption reactor is made into the cylindrical form, its middle and lower portion can be contracted into throat form, the upper portion of the throat portion is equipped with solid granule nozzle, and its lower portion is equipped with desulfurizer slurry nozzle, one side of lower portion of reactor is equipped with flue gas inlet pipe, the high-temp. flue gas to be cleaned is flowed from bottom to top and mixed with desulfurizer fed from throat portion, the flue gas is cooled by desulfurizer slurry, the acid gas can be adsorbed and formed into gas/solid mixture, the rear portion of reactor is successively connected with dust-collector and ash-storing chamber from top to bottom, in the dust-collector the desulfurized by-product can be obtained, the unreacted desulfurizer can be separated.

Description

A kind of semi-dry fume desulfuration and dust removal integrated system of solid, gas recirculation
One, technical field:
The present invention relates to a kind of semi-dry fume desulfuration and dust pelletizing system, particularly relate to a kind of desulfurizing byproduct that has, unreacted desulfurizing agent and the recirculation of grit mixture, and purify the desulfurization of flue gas recirculation and the system that dust removal process is integrated.
Two, background technology:
From all kinds of boilers of fire coal, metallurgical production, Chemical Manufacture, in the flue gases that each production process produced such as the building materials production and the incineration of garbage, contain sour gas such as a large amount of dust and sulfur dioxide, not only corrosion and wear equipment, reduce equipment performance, enter atmosphere at last, cause serious atmosphere pollution.The major technique means of control atmosphere pollution are exactly flue gas ash removal and desulfurization.Conventional dedusting and sweetening process are implemented respectively, i.e. dedusting is carried out in desulfurization or finish sweetening process earlier again after finishing dedusting again.The former is generally used for wet desulfurizing process, the then sulfur removal technologies that are used for dry method or semidry method of the latter more.
Semi-dry fume desulfuration is that the slurries of employing basic anhydride (being generally calcium oxide CaO) are desulfurizing agent, the reaction absorption tower in sour gas absorption reactions such as hot sulfur in smoke, and be heated drying, reach the purpose of desulfurization, and discharge the dry state accessory substance.Be the utilization rate of raising desulfurizing agent, the accessory substance grit, unreacted desulfurizing agent and flue dust mixture are separated from flue gas, return the absorption reaction tower again, form solid grain recirculation.Conventional solid grain recirculation half dry type desulfurization adopts special solid grain piece-rate system and special material to send system back to will send reactor back to by isolated solid grain from flue gas stream, to improve desulfuration efficiency.But its shortcoming is to need dust collection and special induction system for realizing that solid grain circulates, and the flue gas after the desulfurization also needs dedusting again, causes the systematic comparison complexity, and operation problem is more, and cost is also higher; In addition, for keeping the fluidization campaign of the solid-gas two-phase in the reactor, require enough big import flue gas flow.Therefore, this type of desulphurization system is difficult to adapt to the variation of import exhaust gas volumn, and operating ratio is difficulty.
Three, summary of the invention:
Problem at above-mentioned existence, the object of the present invention is to provide a kind of so solid, the semi-dry fume desulfuration and the dust removal integrated system of gas recirculation, it is mainly by the desulfurization absorption reactor thermally, dust-precipitator, ash storage and blower fan are formed, described reactor is a drum shape, in the middle of the bottom is throat, foot one side is equipped with high-temperature flue gas that flue gas inlet tube will purify and feeds and upwards flow, the compressed air that desulfurizer slurry and air hose are sent into is from being connected in the nozzle mouth ejection of throat, atomizing forms small slurry drops, upwards flow in the lump with hot flue gas, flue gas is upwards cooled off by slurries, wherein sour gas is desulfurized the agent absorption and generates (Asia) sulfate, and by air-flow drying, gas/solid mixture enters connected dust-precipitator in the lump from reactor top, unreacted herein desulfurizing agent, (Asia) sulfate and flue dust solid mixture separate from flue gas, and flue gas after being purified is discharged from chimney.Desulfuration byproduct, to ash-storing bin, a part of afterwards the discharge utilized through the valve of bottom and tubes rows for unreacted desulfurizing agent and dust, and a part of solid grain is delivered to the throat top of reactor again by blower fan, realize solid grain recirculation, reuses unreacted desulfurizing agent.And the flue gas that is cleaned can be recycled the conical lower portion that blower fan is delivered to reactor by recirculation pipe, to guarantee the upwards suitable speed of air flow.
Its major advantage:
1. with desulfurization and dedusting combination, all the product of dust-precipitator can circulate in desulfurization reactor and make
Be easy to control with, its internal circulating load, guaranteed debita spissitudo solid-state in the reactor;
2. adopt common blower fan to realize the recirculation of solid grain;
3. adopt and purify flue gas recirculation, guarantee air velocity suitable in the reactor and solid-state concentration, thereby
Guaranteed the high efficiency of desulfurization and dedusting, guaranteed reliability of operation and stability, particularly can
Adapt to the variation significantly of import flue gas flow;
4. rational in infrastructure, simple, operating maintenance is convenient, and cost is low.
Four, description of drawings:
Figure is that the present invention is a kind of admittedly, the semi-dry fume desulfuration and the dust removal integrated system schematic of gas recirculation.
As shown in the figure, desulfurization absorption reactor thermally (7) is a drum shape, its middle and lower part is reactor throat (2), foot is conical lower portion (24), bottom one side is equipped with flue gas inlet tube (1) so that the high-temperature flue gas that will purify is sent into and make progress mobile through the throat that cross section dwindles, desulfurizing agent nozzle (6) is housed in the middle of the throat, the compressed air that desulfurizer slurry is sent into through carrier pipe (4) and compressed air hose (3) enters nozzle (6) through nozzle inlet tube (5), flue gas from the bottom mixes with the alkaline desulfurizer slurry that nozzle (6) ejects, together upwards flow, its high-temperature flue gas is desulfurized the cooling of agent slurries, sour gas such as sulfur dioxide wherein are absorbed reaction, generate solid-state sulphite and sulfate, take the top of reactor (7) to air-flow, the liquid slurry is then by the thermal current drying, form gas/solid mixture, described reactor (7) top one side is connected with dust-precipitator (8), in dust-precipitator (8), desulfuration byproduct in the air-flow, the desulfurizing agent that is not reacted and the solid mixture of flue dust are separated from gas.Ash-valve (9) is equipped with in the bottom of dust-precipitator (8), be connected with the ash-storing bin (11) of bottom by the ash releasing tube (10) that connects, before and after the bottom of ash-storing bin (11) is bifurcated half infundibulate, its bottom is equipped with circulation ash-valve (14) and unloading valve (12) respectively, the solid grain of a part is discharged by ash releasing tube (13), be used, the solid grain of another part drains in the grey wind blender (15) through circulation ash-valve (14), described blender (15) one ends are connected with circulating fan (16), and the other end is connected through the solid grain nozzle (18) of grey recirculation pipe (17) and throat (2) top.One end of induced-draught fan (20) is connected with dust-precipitator (8) by purifying smoke discharge tube (19), and the other end is connected with chimney (21) by induced-draught fan outlet (25), and flue gas after being purified is discharged.In the middle of induced-draught fan outlet (25), draw flue gas recirculation pipe (22), the conical lower portion (24) that the part flue gas after being purified is fed reactor (7) is located, so that increase exhaust gas volumn by reactor, make the solid grain in the reactor be in fluidized state to improve reaction effect, the size of flue gas recirculation amount is regulated and control by the flue gas recycled control valve of being adorned in the recirculation pipe (22) (23).
Described dust-precipitator (8) can be installed more than 2 in front and back side by side.

Claims (2)

1. consolidate for one kind, the semi-dry fume desulfuration and the dust removal integrated system of gas recirculation, mainly comprise the desulfurization absorption reactor thermally, dust-precipitator, ash-storing bin and blower fan, it is characterized in that: desulfurization absorption reactor thermally (7) is drum shape, its middle and lower part is reactor throat (2), foot is conical lower portion (24), one side of bottom is equipped with flue gas inlet tube (1), so that the high-temperature flue gas that will purify is sent into and make progress mobile through the throat that cross section dwindles, desulfurizing agent nozzle (6) is housed in the middle of the throat, desulfurizer slurry through carrier pipe (4) and the compressed air of being sent into by compressed air hose (3) in the lump, enter nozzle (6) through nozzle inlet tube (5), flue gas from the bottom mixes with the alkaline desulfurizer slurry that nozzle (6) ejects, together upwards flow, its high-temperature flue gas is desulfurized the cooling of agent slurries, and sour gas such as sulfur dioxide wherein are absorbed reaction, generate solid-state sulfate and sulphite, take the top of reactor (7) to air-flow, liquid is starched by pneumatic conveying drying, forms gas/solid mixture.Described reactor (7) top one side is connected with dust-precipitator (8), ash-valve (9) is equipped with in the bottom of dust-precipitator (8), be connected with the ash-storing bin (11) of bottom by the ash releasing tube (10) that connects, ash-storing bin (11) bottom is the bifurcated infundibulate, its bottom is equipped with circulation ash-valve (14) and unloading valve (12) respectively, a part of solid grain is discharged by ash releasing tube (13) and is used, another partly solid grain drains in ash-wind blender (15) through ash-valve (14), described blender (15) one ends are connected with circulating fan (16), and the other end is connected through the solid grain nozzle (18) of grey recirculation pipe (17) and throat (2) top.One end of induced-draught fan (20) is connected with dust-precipitator (8) by purifying smoke discharge tube (19), the other end is connected with chimney (21) by induced-draught fan outlet (25), in the middle of induced-draught fan outlet (25), draw the conical lower portion (24) that flue gas recirculation pipe (22) will partly purify flue gas feeding reactor (7), so that increase air quantity, make the solid grain in the reactor be in the boiling situation, the size of flue gas recirculation amount is regulated and control by the flue gas recycled control valve of being adorned in the recirculation pipe (22) (23).
2. a kind of according to claim 1 semi-dry fume desulfuration and dust removal integrated system of solid, gas recirculation, it is characterized in that: described dust-precipitator (8) can be one, also can install side by side more than two.
CN 01144926 2001-12-24 2001-12-24 Solid-gas recirculating semi-dry flue gas desulfurizing and dust-removing integrated system CN1428187A (en)

Priority Applications (1)

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CN 01144926 CN1428187A (en) 2001-12-24 2001-12-24 Solid-gas recirculating semi-dry flue gas desulfurizing and dust-removing integrated system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 01144926 CN1428187A (en) 2001-12-24 2001-12-24 Solid-gas recirculating semi-dry flue gas desulfurizing and dust-removing integrated system

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101275813B (en) * 2007-12-20 2010-05-12 金川集团有限公司 Method for processing acid mud in chimney smelting flue gas
CN101279183B (en) * 2008-05-21 2011-11-30 大连理工大学 Spray absorbing and drying-dry powder activating large multiplying power circulating flue gas desulfurization process
CN102327736A (en) * 2011-06-14 2012-01-25 于力 Method and integrated equipment for collecting desulfuration product by ammonia wet desulfuration dry method
CN101439260B (en) * 2008-12-04 2013-06-12 浙江大学 System for removing nitrous oxides in low-temperature flue gas and technique thereof
CN105351958A (en) * 2015-11-16 2016-02-24 华中科技大学 Oxygen-enriched combustion system
CN106215676A (en) * 2016-08-30 2016-12-14 湖南循安环境资源技术有限公司 A kind of semi-dry desulphurization tower being provided with flue gas self-loopa adjusting means
CN108579407A (en) * 2018-03-05 2018-09-28 攀枝花市蓝鼎环保科技有限公司 Integrated apparatus for dry fume denitration desulfurization and dedusting

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101275813B (en) * 2007-12-20 2010-05-12 金川集团有限公司 Method for processing acid mud in chimney smelting flue gas
CN101279183B (en) * 2008-05-21 2011-11-30 大连理工大学 Spray absorbing and drying-dry powder activating large multiplying power circulating flue gas desulfurization process
CN101439260B (en) * 2008-12-04 2013-06-12 浙江大学 System for removing nitrous oxides in low-temperature flue gas and technique thereof
CN102327736A (en) * 2011-06-14 2012-01-25 于力 Method and integrated equipment for collecting desulfuration product by ammonia wet desulfuration dry method
CN105351958A (en) * 2015-11-16 2016-02-24 华中科技大学 Oxygen-enriched combustion system
CN106215676A (en) * 2016-08-30 2016-12-14 湖南循安环境资源技术有限公司 A kind of semi-dry desulphurization tower being provided with flue gas self-loopa adjusting means
CN106215676B (en) * 2016-08-30 2019-01-29 湖南循安环境资源技术有限公司 A kind of semi-dry desulphurization tower equipped with flue gas self-loopa regulating device
CN108579407A (en) * 2018-03-05 2018-09-28 攀枝花市蓝鼎环保科技有限公司 Integrated apparatus for dry fume denitration desulfurization and dedusting

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