CN103463960A - Desulfurization and purification method of flue gas desulfurization and purification system - Google Patents

Desulfurization and purification method of flue gas desulfurization and purification system Download PDF

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Publication number
CN103463960A
CN103463960A CN 201310387226 CN201310387226A CN103463960A CN 103463960 A CN103463960 A CN 103463960A CN 201310387226 CN201310387226 CN 201310387226 CN 201310387226 A CN201310387226 A CN 201310387226A CN 103463960 A CN103463960 A CN 103463960A
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China
Prior art keywords
flue gas
desulfurization
desulfurizing
purification
gas
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Withdrawn
Application number
CN 201310387226
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Chinese (zh)
Inventor
李树军
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HARBIN JINDA ENVIRONMENT ENGINEERING Co Ltd
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HARBIN JINDA ENVIRONMENT ENGINEERING Co Ltd
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Priority to CN 201310387226 priority Critical patent/CN103463960A/en
Publication of CN103463960A publication Critical patent/CN103463960A/en
Withdrawn legal-status Critical Current

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Abstract

The invention relates to a desulfurization and purification method of a flue gas desulfurization and purification system. Sintering flue gas has the characteristics that the flue gas amount is large, the flue gas has a high dust concentration and fine dust particles, and the flue gas contains dioxin substances, heavy metals and the like, so that various desulfurization technologies are still under continuous improvement and perfection. The method is characterized in that a flue gas inlet system (1) is connected with a desulfurization reaction tower (2); the desulfurization reaction tower is connected with a sodium bicarbonate storage and preparation system (10), a filtration and dedusting system (3) and a material circulation system (11) respectively; the filtration and dedusting system is connected with a heat exchanger (4); the heat exchanger is connected with an original chimney (6), a booster fan (9) and a flue gas heater (5) respectively; the flue gas heater is connected with an SCR (Selective Catalytic Reduction) denitration reaction system (7); and the SCR denitration reaction system is connected with the booster fan, and a liquid nitrogen storage and preparation system (8) respectively. The method is used for desulfurization and purification of the flue gas.

Description

The desulfurizing and purifying method of flue gas desulfurization purification system
technical field:
the present invention relates to a kind of desulfurizing and purifying method of flue gas desulfurization purification system.
background technology:
the sintering flue gas desulfurization process kind is a lot, at present, semi-dry desulphurization be take as main in iron and steel enterprise and the environmental protection company in Europe, and representational technique has the MEROS method (high performance sintered waste gas purification) of Siemens's VAI, the Turbosorp method (circulating fluidized bed technique) of Austrian energy and environment engineering company, the NID method (the Technology of Integrating Desulfurization) of French Alstom.Because sinter fume has, exhaust gas volumn is large, smoke moisture is high, SO x concentration is low, the smoke components fluctuation is large, dust contained flue gas concentration is high and dust granules thin, flue gas contains corrosive gas (HF, HCl, NO x, SO x), flue gas is containing characteristics such as dioxin-like chemical and heavy metals, various sulfur removal technologies are also continuing among Improvement and perfection.
summary of the invention:
a kind of desulfurizing and purifying method that the purpose of this invention is to provide flue gas desulfurization purification system.
above-mentioned purpose realizes by following technical scheme:
a kind of desulfurizing and purifying method of flue gas desulfurization purification system, sinter fume enters Venturi tube by air-introduced machine by the desulfurizing tower bottom, flow velocity increases, and formation recirculating fluidized bed body, at desulfurizing tower bottom high-temperature flue gas and desulfurizing agent, the fully premixed of circulation desulfurization ash, carry out preliminary desulphurization reaction, mainly complete desulfurizing agent and SO2, the reaction of SO3 and heavy metal adsorption, flue gas removes SO2 with reactive desulfurizing agent in desulfurizing tower, enter sack cleaner from top and remove dust, the dust solid particle is by the Desulphurization recirculating system under deduster, return to absorption tower and continue to participate in reaction, reciprocation cycle.
the desulfurizing and purifying method of described flue gas desulfurization purification system; flue gas enters through the desulfurizing tower bottom; because the turbulent flow contact is carried out in the effect of Dual-Phrase Distribution of Gas olid; constantly forming floccule in uphill process returns downwards; in fierce turbulence, constantly disintegrate again by gas lift again; form the peculiar interior circulating granular stream of similar cycle fluidized-bed combustion boiler, make between gas-solid slip velocity up to the decades of times of individual particle slip velocity.The desulfurizing tower top structure is further strengthened returning of floccule, improves the endocorpuscular bed density of tower, makes an interior Ca/S(ion number ratio) value is up to more than 50.Dual-Phrase Distribution of Gas olid mechanism in recirculating fluidized bed, greatly strengthened the heat and mass transport between gas-solid, for realizing high desulfurization rate, provides basic assurance.Unnecessary a small amount of desulfurization ash is delivered in the Desulphurization storehouse by pneumatic transporting, then effluxes by tank car or two-stage conveying equipment.
beneficial effect:
the present invention has following technical characterstic: without wastewater disposition; Single tower disposal ability is large; Need not anti-corrosion measure; The strong adaptability of desulfurizer to load variations.1999, Austria AEE company be certain factory's design-build of Germany, and sintered discharge gas recycles purifier, mainly by spray absorber, active lignite injector and milk of lime injector and bag-type dust filter form, quick lime passes through spouting at bottom, absorption tower inverted draft up to the rotary jet of 13000r/min after adding water formation milk of lime, milk of lime mixes the generation chemical reaction with the sulfide in flue gas, form gypsum, complete sweetening process, flue gas after desulfurization enters sack cleaner by pipeline, the active lignite injector also is installed on pipeline, brown coal are sprayed into to pipeline and mixed to remove dioxin with flue gas, after flue gas enters sack cleaner, complete separating of gas and dirt, dirt effluxes after recycling certain number of times, for the waste and old mine of landfill.
the accompanying drawing explanation:
accompanying drawing 1 is process chart of the present invention.
the specific embodiment:
embodiment 1:
a kind of desulfurizing and purifying method of flue gas desulfurization purification system, sinter fume enters Venturi tube by air-introduced machine by the desulfurizing tower bottom, flow velocity increases, and formation recirculating fluidized bed body, at desulfurizing tower bottom high-temperature flue gas and desulfurizing agent, the fully premixed of circulation desulfurization ash, carry out preliminary desulphurization reaction, mainly complete desulfurizing agent and SO2, the reaction of SO3 and heavy metal adsorption, flue gas removes SO2 with reactive desulfurizing agent in desulfurizing tower, enter sack cleaner from top and remove dust, the dust solid particle is by the Desulphurization recirculating system under deduster, return to absorption tower and continue to participate in reaction, reciprocation cycle.
embodiment 2:
desulfurizing and purifying method according to embodiment 1 described flue gas desulfurization purification system; flue gas enters through the desulfurizing tower bottom; because the turbulent flow contact is carried out in the effect of Dual-Phrase Distribution of Gas olid; constantly forming floccule in uphill process returns downwards; in fierce turbulence, constantly disintegrate again by gas lift again; form the peculiar interior circulating granular stream of similar cycle fluidized-bed combustion boiler, make between gas-solid slip velocity up to the decades of times of individual particle slip velocity.The desulfurizing tower top structure is further strengthened returning of floccule, improves the endocorpuscular bed density of tower, makes an interior Ca/S(ion number ratio) value is up to more than 50.Dual-Phrase Distribution of Gas olid mechanism in recirculating fluidized bed, greatly strengthened the heat and mass transport between gas-solid, for realizing high desulfurization rate, provides basic assurance.Unnecessary a small amount of desulfurization ash is delivered in the Desulphurization storehouse by pneumatic transporting, then effluxes by tank car or two-stage conveying equipment.
embodiment 3:
the desulfurizing and purifying method of described flue gas desulfurization purification system, adopt white lime as desulfurizing agent, can add a small amount of active carbon simultaneously to improve desulfuration efficiency.White lime is to adopt special limeslaker to be obtained by quicklime slaking.The lime slaking system adopts horizontal-type biaxial to stir the dry slaking device.

Claims (2)

1. the desulfurizing and purifying method of a flue gas desulfurization purification system, it is characterized in that: sinter fume enters Venturi tube by air-introduced machine by the desulfurizing tower bottom, flow velocity increases, and formation recirculating fluidized bed body, at desulfurizing tower bottom high-temperature flue gas and desulfurizing agent, the fully premixed of circulation desulfurization ash, carry out preliminary desulphurization reaction, mainly complete desulfurizing agent and SO2, the reaction of SO3 and heavy metal adsorption, flue gas removes SO2 with reactive desulfurizing agent in desulfurizing tower, enter sack cleaner from top and remove dust, the dust solid particle is by the Desulphurization recirculating system under deduster, return to absorption tower and continue to participate in reaction, reciprocation cycle.
2. the desulfurizing and purifying method of flue gas desulfurization purification system according to claim 1, it is characterized in that: flue gas enters through the desulfurizing tower bottom, because the turbulent flow contact is carried out in the effect of Dual-Phrase Distribution of Gas olid, constantly forming floccule in uphill process returns downwards, in fierce turbulence, constantly disintegrate again by gas lift again, form the peculiar interior circulating granular stream of similar cycle fluidized-bed combustion boiler, make between gas-solid slip velocity up to the decades of times of individual particle slip velocity; The desulfurizing tower top structure is further strengthened returning of floccule, improves the endocorpuscular bed density of tower, makes an interior Ca/S(ion number ratio) value is up to more than 50; Dual-Phrase Distribution of Gas olid mechanism in recirculating fluidized bed, greatly strengthened the heat and mass transport between gas-solid, for realizing high desulfurization rate, provides basic assurance; Unnecessary a small amount of desulfurization ash is delivered in the Desulphurization storehouse by pneumatic transporting, then effluxes by tank car or two-stage conveying equipment.
CN 201310387226 2013-08-30 2013-08-30 Desulfurization and purification method of flue gas desulfurization and purification system Withdrawn CN103463960A (en)

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CN 201310387226 CN103463960A (en) 2013-08-30 2013-08-30 Desulfurization and purification method of flue gas desulfurization and purification system

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CN 201310387226 CN103463960A (en) 2013-08-30 2013-08-30 Desulfurization and purification method of flue gas desulfurization and purification system

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104958978A (en) * 2015-06-10 2015-10-07 浙江菲达脱硫工程有限公司 Glass kiln desulfurization, denitration and dust removal apparatus and method thereof
CN105381680A (en) * 2014-08-28 2016-03-09 阿尔斯通技术有限公司 Acidic gas removal using dry sorbent injection
CN111773915A (en) * 2020-06-10 2020-10-16 上海交通大学 Flue gas dry desulfurization process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105381680A (en) * 2014-08-28 2016-03-09 阿尔斯通技术有限公司 Acidic gas removal using dry sorbent injection
CN104958978A (en) * 2015-06-10 2015-10-07 浙江菲达脱硫工程有限公司 Glass kiln desulfurization, denitration and dust removal apparatus and method thereof
CN111773915A (en) * 2020-06-10 2020-10-16 上海交通大学 Flue gas dry desulfurization process

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Application publication date: 20131225

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