CN1248771C - Reaction process for desulfurizing fume with integrated dual-circulation fluidized bed - Google Patents

Reaction process for desulfurizing fume with integrated dual-circulation fluidized bed Download PDF

Info

Publication number
CN1248771C
CN1248771C CN 01114125 CN01114125A CN1248771C CN 1248771 C CN1248771 C CN 1248771C CN 01114125 CN01114125 CN 01114125 CN 01114125 A CN01114125 A CN 01114125A CN 1248771 C CN1248771 C CN 1248771C
Authority
CN
China
Prior art keywords
reactor
flue gas
reaction
desulfurizing
venturi tube
Prior art date
Application number
CN 01114125
Other languages
Chinese (zh)
Other versions
CN1393284A (en
Inventor
李振中
李辰飞
冯兆兴
程云驰
韩旭
马力
刘刚
刘晓东
于遂影
王志强
冯广伟
张悦
Original Assignee
国家电站燃烧工程技术研究中心
辽宁省燃烧工程技术中心
辽宁东电燃烧设备有限公司
辽宁科林环保工程有限责任公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 国家电站燃烧工程技术研究中心, 辽宁省燃烧工程技术中心, 辽宁东电燃烧设备有限公司, 辽宁科林环保工程有限责任公司 filed Critical 国家电站燃烧工程技术研究中心
Priority to CN 01114125 priority Critical patent/CN1248771C/en
Publication of CN1393284A publication Critical patent/CN1393284A/en
Application granted granted Critical
Publication of CN1248771C publication Critical patent/CN1248771C/en

Links

Abstract

The present invention relates to a flue gas desulfurization method for a reaction integrated double-circulation fluidized bed. Flue gas enters a reactor through a Venturi tube from the bottom; water is sprayed in the reactor along a flue gas direction by an atomization nozzle on the throat of the Venturi tube; desulfurizing agents and circulated powdery materials are added to the reactor on the outlet of the Venturi tube; after being fully and rapidly mixed at the bottom of the reactor, materials of a gas phase, a liquid phase and a solid phase upwards flow for desulfurizing reaction; after the reaction, the flue gas is initially separated by the internal separation structure of the outlet of the reactor; the flue gas initially separated is separated by an external separation device; dry materials return to the outlet of the Venturi tube at the bottom of the reactor by a circulation device and continuously react; and then, clean flue gas without acidic materials enters the original flue gas dust removal system.

Description

A kind of reaction process for desulfurizing fume with integrated dual-circulation fluidized bed

Technical field:

The present invention relates to a kind of flue gas desulfurization technique, this technology is one of the technology that is widely used in the emission control process of coal-fired station and refuse-burning plant exhaust pollutant sulfur dioxide, is particularly suitable for the desulfur technology improvement project of existing medium and small unit.

Background technology:

Sulfur dioxide is one of major pollutants that cause problem of environmental pollutions such as greenhouse effects, acid rain.Because in the energy resource structure of China, fire coal accounts for more than 70% always for a long time, in foreseeable future, China is that the energy resource structure of main energy sources can not obtain radical change with the coal, using in a large number of coal produces a large amount of pollutants such as sulfur dioxide, and at present, China's sulfur dioxide annual emissions has occupied first place, the world, have a strong impact on the sustainable development of Chinese national economy, and make the Chinese government face very big international pressure.For realizing the sustainable development of Chinese national economy, improve environmental aspect of China and the people's living environment, China has begun to carry out large-scale environmental improvement work, aspect flue gas desulfurization worldwide successful technology has been carried out comprehensive exploitation, introduction and demonstration project construction.

Flue gas desulfurization is divided into wet method, semidry method and dry desulfurization, the technology that the present invention relates to is a kind of of semi-dry process flue gas desulphurization technology, the basic principle of this technology is the principle of circulating fluidized bed technique, worldwide the desulfur technology of application cycle fluid bed principle has 3~4 kinds at present, the common advantage of circulating fluid bed flue-gas desulfurizing technology is that investment is less, floor space is little, system is simple to operate, desulfuration efficiency is more high, but various circulating fluidized bed desulfur technology all have different usable conditions and restrictive condition.

As: the gas suspension absorption techniques of (1) Denmark Smith Miu Le company (FLS.miljo) (GasSuspension Absorber), this technology are desulfurizing agent with the lime white, and this just brings following problem:

1. need comparatively complicated pulping system, take bigger area;

2. desulfurizing agent sprays into the slurries form, need with the wear-resisting nozzle of special shape, and the whitewashing system stops up easily, influences the normal operation of system;

3. Pen Jiang concentration of slurry has certain limitation, and when coal sulfur content height, when need adding more desulfurizing agent, this system can't use.

(2) the circulating fluid bed flue-gas desulfurizing technology of German Lu Qibixiaofu company (Lurgi) (The Lurgdrygas desul-furization Crculating Fluid Bed (CFB) process), the desulfurizing agent that this technology is used can have two kinds of sources, a kind of is to spray into lime stone at boiler tail, after high-temperature calcination, generate lime, enter the reactor of native system with flue gas; Another kind is that outsourcing lime directly adds in the circulatory system, and there is following problem in this technology:

1. if adopt the lime stone method of spraying into to add desulfurizing agent, influential, thereby influence the efficient of boiler to the heat transfer of boiler, and be easy to locate to produce wearing and tearing at boiler heating surface and pipeline etc., problems such as the ash of gathering;

2. because the dust of high concentration directly enters final deduster and can influence discharge index, therefore need locate to carry out the retrofit work of big workload, increase considerably investment for trnasforming urban land the inlet of deduster, outlet, ash bucket etc.

(3) Sweden Alsthom Power B.V (Alstom Power) circulating fluid bed flue-gas desulfurizing technology (NID:The Novel Integrated desulfurization), this technology has adopted special digester and damping machine, make and move two aspect all require very high, because directly entering final deduster, the dust of high concentration can influence discharge index simultaneously, therefore need locate to carry out the retrofit work of big workload to the inlet of deduster, outlet, ash bucket etc., increase considerably investment for trnasforming urban land.

Summary of the invention:

It is stronger that purpose of the present invention proposes a kind of applicability with regard to being the restrictive condition that exists in actual applications at various prior aries, the circulating fluid bed flue-gas desulfurizing technology that range of application is wider.

The invention provides a kind of reaction process for desulfurizing fume with integrated dual-circulation fluidized bed, is desulfurizing agent with the calcium salt, adopts circulating fluidized bed technique, it is characterized in that basic process is as follows:

1) the next flue gas of station boiler afterbody enters reactor through Venturi tube from the bottom, 120~180 ℃ of the temperature of flue gas, sulfur content 200~10000mg/m 3

2) desuperheat humidification water sprays into reactor with atomizer along the flue gas direction in Venturi tube throat, the addition of water be controlled at make reactor temperature at 65~80 ℃;

3) desulfurizing agent and circulation granular material join reactor in the Venturi tube exit, and the addition of desulfurizing agent is controlled at calcium to sulphur mole ratio 1.0~1.5;

4) after the rapid fully mixing of material of reactor bottom gas, liquid, solid three-phase, and the flow direction is upward mobile, carries out desulphurization reaction simultaneously, and reactor beds material concentration is controlled at 500~3000g/m 3

5) reaction back flue gas is through the interior isolating construction initial gross separation of reactor exit, the material particle Returning reactor inside of the larger particles that produces in the course of reaction, flue gas after the initial gross separation leaves reactor and enters outer separator, and the separative efficiency of separating cycle material requires to reach 50~60% in the reactor;

6) flue gas after the initial gross separation separates through outer separator, dried shape material continues reaction through the Venturi tube outlet of EGR Returning reactor bottom, the clean flue gas that does not contain acidic materials then enters original flue gas dust collecting system, the separative efficiency of outer piece-rate system recycle stock requires to reach 96~98%, the temperature of flue gas is 65~80 ℃ at this moment, sulfur content 20~2000mg/m 3

In the reaction process for desulfurizing fume with integrated dual-circulation fluidized bed of the present invention, desulfurizer therefor is preferably calcium oxide or calcium hydroxide.

The present invention also provides a kind of reaction desulfurizing fume with integrated dual-circulation fluidized bed system that is specifically designed to said method, it is characterized in that this system is made of desulfurizing agent adding apparatus (1), spray cooling device (2), the reactor (3) that has interior isolating construction (9), the outer separator (4) of granular material, granular material EGR (5); Reactor (3), outer separator (4), the circulation of EGR (5) head and the tail are joined, spray cooling device (2) meets reactor (3) front end Venturi tube throat, and desulfurizing agent adding apparatus (1) and EGR (5) connect reactor (3) front end Venturi tube exit.

The present invention reacts in the desulfurizing fume with integrated dual-circulation fluidized bed system, and the interior isolating construction of described reactor (3) can be, according to the inertia separator structure of technological requirement in the reactor exit conventional design.

The present invention reacts in the desulfurizing fume with integrated dual-circulation fluidized bed system, and described outer piece-rate system (4) preferably adopts cheap cyclone separator.

Reaction process for desulfurizing fume with integrated dual-circulation fluidized bed of the present invention can be widely used in the flue gas that sulfur content is not more than 4% coal-fired power station boiler and handle.

The present invention has following advantage:

(1) desulfurizing agent adds with dry powder form, need not slurrying, has simplified flow process, fouling and the blockage problem of avoiding system to be in operation and to occur;

(2) adopt the spray cooling mode to adjust reaction temperature,, be particularly suitable for using flue gas processing than the boiler of high sulfur content coal to enlarge present technique to the adaptability that different coal sulfur content change.

(3) in the reactor inner circulation structure is set, make the material particle of the larger particles that produces in the course of reaction obtain initial gross separation, Returning reactor inside, heat transfer and mass transport process in the reactor have been strengthened, prolonged desulfurizing agent time of staying in reactor, make desulfurizing agent further finish desulphurization reaction, and alleviate the segregational load of follow-up granular material separation equipment.

(4) adopt independent comparatively cheap granular material separation equipment,, reduce the workload of the system reform, reduce investment for trnasforming urban land so that native system outlet dust concentration reaches the concentration of original device.

(5) concentrate on reactor bottom with the humidification of desulfurizing agent, digestion and with sour gas reaction such as sulfur in smoke, simplify flow process, reduce and take up an area of.

In a word, system of the present invention is simple, operational stability good, desulfurizing agent adaptability is strong, desulfuration efficiency is high, can reach more than 80%, and can remove sour gas such as hydrogen fluoride in the flue gas, hydrogen chloride simultaneously.

Below by embodiment in detail the present invention is described in detail.

Description of drawings:

Accompanying drawing 1 connects signal for present device.

The specific embodiment:

The embodiment of the invention all adopts the equipment shown in the accompanying drawing 1 to connect, and idiographic flow is described below: the flue gas that station boiler afterbody (7) comes enters reactor (3) bottom, through Venturi tube air-flow is evenly distributed; Desuperheat humidification water sprays in Venturi tube throat by spray cooling device (2); Desulfurizing agent and circulation granular material add in the Venturi tube outlet by desulfurizing agent adding apparatus (1) and EGR (5); After the material of above-mentioned gas, liquid, solid three-phase fully mixes rapidly, and flow to upward mobile, carry out desulphurization reaction simultaneously, through arriving reactor (3) outlet after the reaction of several seconds, in reactor (3) exit isolating construction in the baffle-like (9) is set, so that the material particle of the larger particles that produces in the course of reaction obtains initial gross separation, Returning reactor (3) inside; Flue gas after the initial gross separation enters tailored flour shape material separation device (4)---cyclone separator after leaving reactor (3), dried shape material after the separation continues reaction to improve the utilization rate and the desulfuration efficiency of desulfurizing agent through the quantitative Returning reactor (3) of EGR (5), the partial reaction product effluxes through outer arranging device (6), and the flue gas after the separation then enters original flue gas dust collecting system (8).

Embodiment 1

Certain station boiler discharging flue gas 17 ten thousand stere/hour, sulfur-bearing 2000mg/Nm in the flue gas 3, the reactor intended diameter is 3.8m, groove separator is adopted in interior separation, adopt the structure of the two outer separators of single tower, outer separator adopts common cyclone separator, and diameter is 3.3m, adopt common hydrated lime in powder as desulfurizing agent, fineness 150~300 orders, the calcium to sulphur mole ratio of employing are 1.2.Idiographic flow is:

The flue gas that comes from the station boiler afterbody enters reactor (3) bottom, through Venturi tube air-flow is evenly distributed; Desuperheat humidification water sprays in Venturi tube throat by spray cooling device (2); Desulfurizing agent and circulation granular material add in the Venturi tube outlet by desulfurizing agent adding apparatus and EGR; After the material of above-mentioned gas, liquid, solid three-phase fully mixes rapidly, and flow to upward mobile, carry out desulphurization reaction simultaneously, arrive reactor outlet through after the reaction of several seconds, isolating construction in reactor exit is provided with baffle-like, so that the material particle of the larger particles that produces in the course of reaction obtains initial gross separation, Returning reactor inside; Flue gas after the initial gross separation enters two special-purpose powdery material separation device-cyclone separators respectively after leaving reactor, dried shape material after the separation continues reaction to improve the utilization rate and the desulfuration efficiency of desulfurizing agent through the quantitative Returning reactor of EGR, the partial reaction product effluxes through outer arranging device, and the flue gas after the separation then enters original flue gas dust collecting system.The design desulfuration efficiency of this system is 85%.

Embodiment 2

Certain station boiler discharging flue gas 48.5 ten thousand stere/hour, sulfur-bearing 6000mg/Nm in the flue gas 3The reactor intended diameter is 5m, and groove separator is adopted in interior separation, adopts the structure of the two outer separators of single tower, outer separator adopts common cyclone separator, diameter is 4.8m, establishes two covers reaction system in parallel, and final capital equipment is two reactors, four outer separators, adopt common hydrated lime in powder as desulfurizing agent, fineness 150~300 orders, the calcium to sulphur mole ratio of employing are 1.4.Idiographic flow is:

The flue gas that comes from the station boiler afterbody enters reactor (3) bottom, through Venturi tube air-flow is evenly distributed; Desuperheat humidification water sprays in Venturi tube throat by spray cooling device (2); Desulfurizing agent and circulation granular material add in the Venturi tube outlet by desulfurizing agent adding apparatus and EGR; After the material of above-mentioned gas, liquid, solid three-phase fully mixes rapidly, and flow to upward mobile, carry out desulphurization reaction simultaneously, arrive reactor outlet through after the reaction of several seconds, isolating construction in reactor exit is provided with baffle-like, so that the material particle of the larger particles that produces in the course of reaction obtains initial gross separation, Returning reactor inside; Flue gas after the initial gross separation enters two special-purpose powdery material separation device-cyclone separators respectively after leaving reactor, dried shape material after the separation continues reaction to improve the utilization rate and the desulfuration efficiency of desulfurizing agent through the quantitative Returning reactor of EGR, the partial reaction product effluxes through outer arranging device, and the flue gas after the separation then enters original flue gas dust collecting system.The design desulfuration efficiency of this system is 90%.

Claims (6)

1, a kind of reaction process for desulfurizing fume with integrated dual-circulation fluidized bed is a desulfurizing agent with the calcium salt, adopts circulating fluidized bed technique, it is characterized in that basic process is as follows:
1) the next flue gas of station boiler afterbody enters reactor through Venturi tube from the bottom, 120~180 ℃ of the temperature of flue gas, sulfur content 100~10000mg/m 3
2) desuperheat humidification water sprays into reactor with atomizer along the flue gas direction in Venturi tube throat, the addition of water be controlled at make reactor temperature at 65~80 ℃;
3) desulfurizing agent and circulation granular material join reactor in the Venturi tube exit, and the addition of desulfurizing agent is controlled at calcium to sulphur mole ratio 1.0~1.5;
4) after the rapid fully mixing of material of reactor bottom gas, liquid, solid three-phase, and the flow direction is upward mobile, carries out desulphurization reaction simultaneously, and reactor beds material concentration is controlled at 500~3000g/Nm 3
5) reaction back flue gas is through the interior isolating construction initial gross separation of reactor exit, the material particle Returning reactor inside of the larger particles that produces in the course of reaction, flue gas after the initial gross separation leaves reactor and enters outer separator, and the separative efficiency of separating cycle material requires to reach 50~60% in the reactor;
6) flue gas after the initial gross separation separates through outer separator, dried shape material continues reaction through the Venturi tube outlet of EGR Returning reactor bottom, the clean flue gas that does not contain acidic materials then enters original flue gas dust collecting system, the separative efficiency of outer piece-rate system recycle stock requires to reach 96~98%, the temperature of flue gas is 65~80 ℃ at this moment, sulfur content 200~2000mg/Nm 3
2, by the described reaction process for desulfurizing fume with integrated dual-circulation fluidized bed of claim 1, it is characterized in that: described desulfurizing agent is calcium oxide or calcium hydroxide.
3, a kind of reaction desulfurizing fume with integrated dual-circulation fluidized bed system that is specifically designed to the described method of claim 1 is characterized in that this system is made of desulfurizing agent adding apparatus (1), spray cooling device (2), the reactor (3) that has interior isolating construction (31), the outer separator (4) of granular material, granular material EGR (5); Reactor (3), outer separator (4), the circulation of EGR (5) head and the tail are joined, spray cooling device (2) meets reactor (3) front end Venturi tube throat, and desulfurizing agent adding apparatus (1) and EGR (5) connect reactor (3) front end Venturi tube exit.
4, by the described reaction desulfurizing fume with integrated dual-circulation fluidized bed of claim 3 system, it is characterized in that: the inertia separator structure that the interior isolating construction of described reactor (3) designs for reactor exit.
5, by the described reaction desulfurizing fume with integrated dual-circulation fluidized bed of claim 3 system, it is characterized in that: described outer piece-rate system (4) adopts cyclone separator.
6, the described reaction process for desulfurizing fume with integrated dual-circulation fluidized bed of claim 1 is used for the flue gas that sulfur content is not more than 4% coal-fired power station boiler and handles.
CN 01114125 2001-06-22 2001-06-22 Reaction process for desulfurizing fume with integrated dual-circulation fluidized bed CN1248771C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 01114125 CN1248771C (en) 2001-06-22 2001-06-22 Reaction process for desulfurizing fume with integrated dual-circulation fluidized bed

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 01114125 CN1248771C (en) 2001-06-22 2001-06-22 Reaction process for desulfurizing fume with integrated dual-circulation fluidized bed

Publications (2)

Publication Number Publication Date
CN1393284A CN1393284A (en) 2003-01-29
CN1248771C true CN1248771C (en) 2006-04-05

Family

ID=4660799

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 01114125 CN1248771C (en) 2001-06-22 2001-06-22 Reaction process for desulfurizing fume with integrated dual-circulation fluidized bed

Country Status (1)

Country Link
CN (1) CN1248771C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102213414A (en) * 2010-04-07 2011-10-12 华盛江泉集团有限公司 Desulfuration electrostatic dust collection device of circulating fluidized bed (CFB)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100425329C (en) * 2005-11-25 2008-10-15 山东大学 Tech. for desulphuni zation of flue-gas by using integrated internal circulation and two-speed fluidized bed
CN1916490B (en) * 2006-08-15 2012-07-04 周开根 Smokeless burning technique and equipment with fire fontanel being setup inside furnace
CN101288825B (en) * 2008-06-16 2012-02-22 万若(北京)环境工程技术有限公司 Semi-dry type fume cleaning method and device
CN101559323B (en) * 2009-06-03 2011-09-14 周建安 Digestive circulating fluid bed flue gas desulfurization method and device
CN101768887B (en) * 2010-03-17 2012-12-26 山东和润浆纸有限公司 Circular utilization method of straw in pulping and papermaking processes
CN102071071B (en) * 2010-11-25 2013-06-12 山西天和煤气化科技有限公司 Method for cooling and dedusting fluidized bed gasified raw coal gas
CN102564070A (en) * 2012-02-27 2012-07-11 无锡超科食品有限公司 Material drying system
CN108273375A (en) * 2017-12-29 2018-07-13 铜陵铜冠神虹化工有限责任公司 The hot carbonizer flue gas desulfurization device and technique in vulcanized sodium production

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102213414A (en) * 2010-04-07 2011-10-12 华盛江泉集团有限公司 Desulfuration electrostatic dust collection device of circulating fluidized bed (CFB)

Also Published As

Publication number Publication date
CN1393284A (en) 2003-01-29

Similar Documents

Publication Publication Date Title
CN102974185B (en) Modularized integrated smoke purification system and method for removing plurality of pollutants
CN100496675C (en) Simultaneous desulfurization and denitration wet ammonia flue gas cleaning technology and system thereof
CN1089622C (en) Flue gas desulfurization method and apparatus
CN101254394B (en) Sintering device flue gas multiple pollutant removing process and system thereof
US6143263A (en) Method and system for SO2 and SO3 control by dry sorbent/reagent injection and wet scrubbing
CN104941423B (en) A kind of regeneration fume from catalytic cracking ammonia process of desulfurization denitration dust collecting method and device
CN100464825C (en) Semi-dry desulfurizing process in double feedback circular fluidized bed
CN204865475U (en) Coal -fired power plant boiler flue gas desulphurization device
CN100551496C (en) Unite the Wet-type ammonia process flue gas purifying technique and the system thereof that remove multiple pollutant
US20020110511A1 (en) Horizontal scrubber system
CN102228788B (en) Device and method for removing sulfur dioxide and dioxin from sintering flue gas
US9895657B2 (en) High-efficiency method for removing sulfur and mercury of coal-fired flue gas, and apparatus thereof
CN104107626A (en) Sintering flue gas circulating fluidized bed (CFB) semi-dry combined desulfurization and denitrification device and method
CN105056749A (en) System and method for removing nitric oxides and sulfur oxides in flue gas simultaneously
US4645653A (en) Method for dry flue gas desulfurization incorporating nitrogen oxides removal
CN1231286C (en) A circulating fluidized bed process for cleaning fume by adding iron ash and its equipment
CN1239235C (en) Dry smoke cleaning process for desulfurizing and denitrating simultaneously and its system
CN106621714B (en) A kind of single column two-region desulphurization system
BRPI0718179B1 (en) Wet desulfurization and withdrawal of sinterization combustion gas dust.
CN103480272A (en) Dust-removing, denitration and desulfurization process and device for flue gas of glass kiln
CN1247294C (en) Method and equipment of desulfurization and denitrogenation for purifying flue gas
CN100496676C (en) Wet ammonia flue gas cleaning technology simultaneously removing various pollutant and system thereof
CN1114467C (en) Dry cyclic suspension bed fume desulfurizing process and system
CN103230723B (en) Annular sectional cross-flow fume cleaning adsorption tower
CN1239232C (en) Multiple reaction integrated process for desulfuizing from fume by dry method and its system

Legal Events

Date Code Title Description
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20060405

Termination date: 20150622

EXPY Termination of patent right or utility model