CN105617861B - A kind of dry powder adsorbent flue injection removing SO3Equipment - Google Patents
A kind of dry powder adsorbent flue injection removing SO3Equipment Download PDFInfo
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- CN105617861B CN105617861B CN201610202418.XA CN201610202418A CN105617861B CN 105617861 B CN105617861 B CN 105617861B CN 201610202418 A CN201610202418 A CN 201610202418A CN 105617861 B CN105617861 B CN 105617861B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8603—Removing sulfur compounds
- B01D53/8609—Sulfur oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/12—Methods and means for introducing reactants
- B01D2259/128—Solid reactants
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- Treating Waste Gases (AREA)
Abstract
The present invention relates to coal-fired flue-gas Pollutant Control Technology fields, and in particular to a kind of dry powder adsorbent flue injection removing SO3Equipment.It includes the storage tank for storing dry powder alkaline adsorbent, the top of storage tank is equipped with reservoir inlet and storage tank exhaust outlet, storage tank exhaust outlet is connected by storage tank appendix with the air inlet of storage tank filter, the middle part of storage tank appendix is connected by being equipped with the pipeline of the first pneumatic pipe valve with first pressure gas source, the top of storage tank is equipped with the micro positive pressure device for making to keep micro-positive pressure in storage tank, the lower part of storage tank is cone angle cone bucket shape directed downwardly, the bottom of storage tank is equipped with reservoir outlet, pneumatic feeding machine is equipped at reservoir outlet, the lower section of pneumatic feeding machine is equipped with gravimetric tank, the discharge port of pneumatic feeding machine is connected by pneumatic feeding machine conveying pipeline with the feed inlet at the top of gravimetric tank, pneumatic feeding machine conveying pipeline is connected by being equipped with the pipeline of pipe valve with second pressure gas source, the top of gravimetric tank is equipped with gravimetric tank exhaust outlet.
Description
Technical field
The present invention relates to atmosphere pollution control technology fields, and in particular to a kind of dry powder adsorbent flue injection removing
SO3Equipment.
Background technique
Coal-fired thermal power generation is the principal mode of the current electrical energy production in China.Data show that China's thermoelectricity generated energy is up to
80% or more of total power generation, wherein the electric installed capacity based on fire coal accounts for total capacity 75%, the energy nature in China is objective
Determine that the power supply pattern based on coal-fired thermal power generation will not change in a short time.The flue gas of coal-burning power plant's discharge contains greatly
Sulfide, NOx and heavy metal etc. are measured, wherein SO2It has been more than 50% with ratio of the NOx in flue gas.In addition to this one generated
Secondary to be important industrial pollution source with secondary PM2.5, the atmosphere pollution of control coal-burning power plant discharge, which becomes, administers haze weather
Main behave.SO in coal-fired flue-gas2There are about 1.5%-3% to be changed into SO3, as SO in flue gas3When concentration is more than 10ppm, with water
Steam, which combines, forms small aerosol particle, improves flue gas acid dew point, causes low-temperature corrosion.In addition to environment and corrosion failure,
SO3It is the main reason for causing SCR denitration system catalyst and air preheater cold-end air heat exchange element " stifled ash ", to cause air-introduced machine
Stall influences to keep the safety in production.
Currently, the Conventional pollutions such as the electrostatic precipitator of coal fired power plant and WFGD control equipment to SO in flue gas3Removing effect
Rate is lower.Main flue gas SO3Control technology includes mixing to burn low-sulfur coal, the low SO of exploitation2/SO3The SCR denitration of conversion ratio,
Lime stone is added into fire coal and physics removing, the SO of the above apparatus and method are carried out using wet electrical dust precipitator3Removal effect
Also it is difficult to meet the requirements.The Chinese patent of Patent No. 201120223113.X discloses a kind of sulfur trioxide tail gas absorption dress
It sets, including absorption tower, sulfur trioxide reaction tower etc., the apparatus function is similar with WESP, can not solve SO3Caused by air preheat
Device blockage problem.Patent No. 201310044506.8X discloses a kind of SO using trona slurries3Removing means, the dress
It sets by injecting trona slurries into flue and removes SO3.The physicochemical characteristic of slurries is different with dry powder physicochemical property, device system
Difference of uniting is big, meanwhile, slurry injection device way of realization is more complex, and reliability is poor.
Summary of the invention
The object of the present invention is to provide a kind of removing SO3It is high-efficient, remove SO3Thoroughly, stable and reliable for performance, to delay SO3
Caused by air preheater block, reduce SO3Caused upstream device corrosion, is effectively reduced the SO in flue gas3Content, reduction pair
The destruction of ecological environment, and can effectively save the dry powder adsorbent flue injection removing SO of alkaline adsorbent3Equipment.
Dry powder adsorbent flue injection removing SO of the invention3Equipment, including the storage for storing dry powder alkaline adsorbent
Tank, the top of storage tank are equipped with reservoir inlet and storage tank exhaust outlet, and storage tank exhaust outlet passes through storage tank appendix and storage tank filter
Air inlet be connected, storage tank appendix be equipped with the first pneumatic pipe valve, the first pneumatic pipe valve pass through pneumatic line and first pressure
Gas source is connected, and the top of storage tank is equipped with the micro positive pressure device for making to keep micro-positive pressure in the storage tank, and the lower part of storage tank is
Cone angle cone bucket shape directed downwardly, the bottom of storage tank are equipped with reservoir outlet, are equipped with pneumatic feeding machine, pneumatic feeding at reservoir outlet
The bottom of machine is equipped with discharge port, and the lower section of pneumatic feeding machine is equipped with gravimetric tank, and the discharge port of pneumatic feeding machine passes through pneumatic feeding
Machine conveying pipeline is connected with the feed inlet at the top of gravimetric tank, and pneumatic feeding machine conveying pipeline is equipped with the second pneumatic pipe valve, and second is pneumatic
Pipe valve is connected by pneumatic line with second pressure gas source, and the top of gravimetric tank is equipped with gravimetric tank exhaust outlet, gravimetric tank exhaust outlet
It is connected by gravimetric tank appendix with the air inlet of gravimetric tank filter, gravimetric tank appendix is equipped with pneumatic pipe valve of weighing, and claims
The pneumatic pipe valve of weight is connected by pneumatic line with second pressure gas source, and the bottom of gravimetric tank is equipped with gravimetric tank discharge port, gravimetric tank
Lower section be equipped with rotary valve, gravimetric tank discharge port is connected by gravimetric tank conveying pipeline with the feed inlet at the top of rotary valve, gravimetric tank
Conveying pipeline is equipped with the pneumatic pipe valve of third, and the pneumatic pipe valve of third is connected by pneumatic line with third pressure gas source, the rotation
The bottom of valve is equipped with rotary valve discharge port；
The rotary valve discharge port is connected with the feed inlet being located on air delivery tube tube wall, the air inlet of air delivery tube
It is connected with the air outlet of blower, the discharge port of air delivery tube is connected with the feed inlet of distributor, and the discharge port of distributor passes through
Pipeline is connected with the multiple nozzles being located in flue.
Preferably, the micro-positive pressure of 0.4kPa -0.8kPa is kept in the powder storage tank.
Preferably, the blower is roots blower.
Preferably, the dry powder alkaline adsorbent is calcium hydroxide or sodium carbonate or sodium bicarbonate.
Preferably, the spray feed amount M (kg/h) and flue gas SO of the dry powder alkaline adsorbent2Concentration C (mg/Nm3) and flue gas
Measure V (Nm3/ h) relationship are as follows:
M=4kCV
Wherein k takes 1.5 × 10-5-4×10-5。
Technical solution of the present invention has the advantages that
Dry powder adsorbent flue injection removing SO of the invention3Equipment, can be according to SO in flue gas2Concentration makes alkaline adsorbent
SO in the straying quatity and flue gas of feed powder3Amount match.To ensure that SO3Removal effect saves alkaline adsorbent feed powder.This
The dry powder adsorbent flue injection removing SO of invention3Equipment, the tank top is equipped with micro positive pressure device, for keeping in storage tank
The micro-positive pressure of 0.4kPa-0.8kPa realizes that powder is moisture-proof and blanking smoothly function.The pneumatic feeding machine is not only fed speed
Degree is fast, and stable and reliable working performance.In addition, filter is provided at the top of the powder storage tank and gravimetric tank, for filtering
What is be discharged from the tank injures containing dusty gas, reduction pollution environment and to the dust of operator.SO of the invention3Removing
Equipment can change feed powder injection volume by adjusting rotary valve, make SO in alkaline adsorbent injection volume and flue gas3Amount match.
To ensure that removal efficiency, thereby save alkaline adsorbent.Therefore, dry powder adsorbent flue of the invention injects removing
SO3Equipment has removing SO3It is high-efficient, remove SO3Thoroughly, stable and reliable for performance, to delay SO3Caused by Blocking in Air Preheater
Plug reduces SO3Caused upstream device corrosion, is effectively reduced the SO in flue gas3Content reduces the destruction to ecological environment, and can
The characteristics of effectively saving alkaline adsorbent.
Dry powder adsorbent flue injection removing SO of the invention is further illustrated below in conjunction with accompanying drawings and embodiments3If
It is standby.
Detailed description of the invention
Fig. 1 is dry powder adsorbent flue injection removing SO of the invention3The structural schematic diagram of equipment.
Specific embodiment
As shown in Figure 1, dry powder adsorbent flue injection removing SO of the invention3Equipment, including for storing dry powder alkalinity
The storage tank 3 of adsorbent, the top of storage tank 3, which is equipped with reservoir inlet and storage tank exhaust outlet, can pass through the top of storage tank 3 when in use
Dry powder alkaline adsorbent is added in storage tank 3 by the reservoir inlet in portion, and storage tank exhaust outlet passes through storage tank appendix and storage tank mistake
The air inlet of filter 1 is connected, and storage tank filter 1 is used to filter the dust in the gas for getting rid of the discharge of storage tank 3, storage tank appendix
Middle part be equipped with the first pneumatic pipe valve, the first pneumatic pipe valve is connected by pneumatic line with first pressure gas source 2, first pressure gas
Source 2 can control the first pneumatic pipe valve to open or close, the top of storage tank 3 be equipped with for make to keep in the storage tank 3 it is micro- just
The micro positive pressure device 12 of pressure realizes moisture-proof and blanking smoothly function.The lower part of storage tank 3 is cone angle cone bucket shape directed downwardly, storage tank 3
Bottom be equipped with reservoir outlet, the pneumatic feeding machine 4 for feed, the bottom of pneumatic feeding machine 4 are equipped at reservoir outlet
Equipped with discharge port, the lower section of pneumatic feeding machine 4 is equipped with the gravimetric tank 6 for weighing, and the discharge port of pneumatic feeding machine 4 passes through pneumatic
Batcher conveying pipeline is connected with the feed inlet at 6 top of gravimetric tank, when in use, can be realized by pneumatic feeding device 4 to storage tank 3
Input the control of the powder in weighing pot 6.Pneumatic feeding machine conveying pipeline is equipped with the second pneumatic pipe valve, and the second pneumatic pipe valve passes through gas
Dynamic pipeline is connected with second pressure gas source 13, and second pressure gas source 13 can control opening or closing for the second pneumatic pipe valve, weighs
The top of tank 6 is equipped with gravimetric tank exhaust outlet, and gravimetric tank exhaust outlet passes through the air inlet of gravimetric tank appendix and gravimetric tank filter 5
Mouthful it is connected, gravimetric tank filter 5 is used to filter the dust got rid of in the gas that gravimetric tank 6 is discharged, in gravimetric tank appendix
Portion is equipped with pneumatic pipe valve of weighing, and pneumatic pipe valve of weighing is connected by pneumatic line with second pressure gas source 13, second pressure gas source
13 controllable pneumatic pipe valves of weighing open or close, and the bottom of gravimetric tank 6 is equipped with gravimetric tank discharge port, the lower section of gravimetric tank 6
Equipped with for making feed powder enter the rotary valve 7 of air delivery tube, gravimetric tank discharge port is pushed up by gravimetric tank conveying pipeline and rotary valve 7
The feed inlet in portion is connected, and gravimetric tank conveying pipeline is equipped with the pneumatic pipe valve of third, the pipeline and third pressure gas source of the pneumatic pipe valve of third
14 are connected, and third pressure gas source 14 can control opening or closing for the pneumatic pipe valve of third, and the bottom of rotary valve 7 goes out equipped with rotary valve
Material mouth；
The rotary valve discharge port is connected with the feed inlet being located on air delivery tube tube wall, the air inlet of air delivery tube
It is connected with the air outlet of blower 9, the discharge port of air delivery tube is connected with the feed inlet of distributor 10, and distributor 10 can be by air-flow
The feed powder of delivery pipe conveying branches in multiple pipelines, and the discharge port of distributor 10 passes through pipeline and multiple sprays in flue
Mouth 11 is connected.
Further, the micro-positive pressure of 0.4kPa -0.8kPa is kept in the powder storage tank 3.
Further, the blower 9 is roots blower.
Further, the dry powder alkaline adsorbent is calcium hydroxide or sodium carbonate or sodium bicarbonate.
Further, the spray feed amount M (kg/h) and flue gas SO of the dry powder alkaline adsorbent2Concentration C (mg/Nm3) and cigarette
Tolerance V (Nm3/ h) relationship are as follows:
M=4kCV
Wherein k takes 1.5 × 10-5-4×10-5。
Embodiment 1
Below by taking certain 600MW coal unit as an example, in conjunction with attached drawing, the invention will be further described.
The present embodiment provides a kind of dry powder adsorbent flues to inject removing SO3Equipment, as shown in Figure 1, comprising:
Storage tank 3, for storing dry powder alkaline adsorbent；
Gravimetric tank 6 is connected to the storage tank 3；
It is connected to, is realized by pneumatic feeding device 4 to powder storage tank by pneumatic feeding device 4 between storage tank 3 and weighing pot 6
3 are passed through the control of the powder in weighing pot 6.
Rotary valve 7 is arranged below gravimetric tank 6, for making feed powder enter air delivery tube；
Distributor 10, the feed powder for conveying air delivery tube shunt；
Nozzle 11 protrudes into the allocated device 10 in flue and is connected to by feeding pipeline with the rotary valve 7；
Roots blower 9 divides feed powder by the allocated device 10 of air delivery tube for feeding gas into air delivery tube
It is sprayed after stream by nozzle 11；
Micro positive pressure device, for keeping the micro-positive pressure in storage tank；
It is respectively arranged with storage tank filter 1 and gravimetric tank filter 5 at the top of the powder storage tank 3 and gravimetric tank 6, was used for
The dust in gas is discharged in filter tank.
Further, it is additionally provided with micro positive pressure device at the top of the powder storage tank 3, is protected in the powder storage tank 1 for making
The micro-positive pressure of 0.4kPa-0.8kPa is held, realizes that powder is moisture-proof and blanking is smooth.
The present invention exports the flue between air preheater in SCR denitration reaction device and injects dry powder adsorbent, selected suction
Attached dose is calcium hydroxide, and design adsorbent injection volume is 1.3ton/h.Utilize the strong basicity and SO of calcium hydroxide3Reaction, through SO3
Analyzer detection, this system can be by the SO of air preheater entrance3Mean concentration is down to 3.85ppm.Therefore, dry powder of the invention absorption
Agent flue injection removing SO3Equipment has removing SO3It is high-efficient, remove SO3Thoroughly, stable and reliable for performance, to delay SO3It causes
Air preheater blocking, reduce SO3Caused upstream device corrosion, is effectively reduced the SO in flue gas3Content reduces to ecology
The destruction of environment, and the characteristics of can effectively save alkaline adsorbent.
Claims (3)
1. dry powder adsorbent flue injection removing SO3Equipment, it is characterised in that including the storage tank for storing dry powder alkaline adsorbent
(3), the top of storage tank (3) is equipped with reservoir inlet and storage tank exhaust outlet, and storage tank exhaust outlet passes through storage tank appendix and storage tank mistake
The air inlet of filter (1) is connected, and storage tank appendix is equipped with the first pneumatic pipe valve, and the first pneumatic pipe valve passes through pneumatic line and the
One pressure gas source (2) is connected, and the top of storage tank (3) is equipped with the micro-positive pressure dress for making to keep micro-positive pressure in the storage tank (3)
It sets (12), the lower part of storage tank (3) is cone angle cone bucket shape directed downwardly, and the bottom of storage tank (3) is equipped with reservoir outlet, reservoir outlet
Place is equipped with pneumatic feeding machine (4), and the bottom of pneumatic feeding machine (4) is equipped with discharge port, and the lower section of pneumatic feeding machine (4) is equipped with weighing
The discharge port of tank (6), pneumatic feeding machine (4) is connected by pneumatic feeding machine conveying pipeline with the feed inlet at the top of gravimetric tank (6), gas
Dynamic batcher conveying pipeline is equipped with the second pneumatic pipe valve, and the second pneumatic pipe valve passes through pneumatic line and second pressure gas source (13) phase
Even, the top of gravimetric tank (6) is equipped with gravimetric tank exhaust outlet, and gravimetric tank exhaust outlet passes through gravimetric tank appendix and gravimetric tank filter
(5) air inlet is connected, and gravimetric tank appendix is equipped with pneumatic pipe valve of weighing, and pneumatic pipe valve of weighing passes through pneumatic line and second
Pressure gas source (13) is connected, and the bottom of gravimetric tank (6) is equipped with gravimetric tank discharge port, and the lower section of gravimetric tank (6) is equipped with rotary valve
(7), gravimetric tank discharge port is connected by gravimetric tank conveying pipeline with the feed inlet at the top of rotary valve (7), is set on gravimetric tank conveying pipeline
There is the pneumatic pipe valve of third, the pneumatic pipe valve of third is connected by pneumatic line with third pressure gas source (14), the rotary valve (7)
Bottom is equipped with rotary valve discharge port；
The rotary valve discharge port is connected with the feed inlet being located on air delivery tube tube wall, the air inlet and wind of air delivery tube
The air outlet of machine (9) is connected, and the discharge port of air delivery tube is connected with the feed inlet of distributor (10), the discharging of distributor (10)
Mouth is connected by pipeline with the multiple nozzles (11) being located in flue；
The spray feed amount M (kg/h) and flue gas SO of the dry powder alkaline adsorbent2Concentration C (mg/Nm3) and exhaust gas volumn V (Nm3/ h)
Relationship are as follows:
M=4kCV
Wherein k takes 1.5 × 10-5-4×10-5；
The micro-positive pressure of 0.4kPa or 0.8kPa is kept in the powder storage tank (3).
2. dry powder adsorbent flue injection removing SO according to claim 13Equipment, it is characterised in that the blower (9) is
Roots blower.
3. dry powder adsorbent flue injection removing SO according to claim 23Equipment, it is characterised in that the dry powder alkalinity
Adsorbent is calcium hydroxide or sodium carbonate or sodium bicarbonate.
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| CN201610202418.XA CN105617861B (en) | 2016-04-01 | 2016-04-01 | A kind of dry powder adsorbent flue injection removing SO3Equipment |
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| CN201610202418.XA CN105617861B (en) | 2016-04-01 | 2016-04-01 | A kind of dry powder adsorbent flue injection removing SO3Equipment |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106179739A (en) * | 2016-08-02 | 2016-12-07 | 中国华电科工集团有限公司 | Dust arrester and flue gas ash removal method |
| CN106861375A (en) * | 2017-04-25 | 2017-06-20 | 广州冉升环保工程有限公司 | The device and method that a kind of sulfur trioxide in flue gas is administered |
| CN108636096A (en) * | 2018-06-08 | 2018-10-12 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | The method that alkaline adsorbent flue injects cooperation-removal heavy metal in flue gas and sour gas |
| CN109051815A (en) * | 2018-06-29 | 2018-12-21 | 亚德（上海）环保***有限公司 | A kind of dry-process deacidification material-transporting system |
| CN113844917A (en) * | 2021-10-08 | 2021-12-28 | 佛山市金银河智能装备股份有限公司 | Powder self-bleeding filtering mechanism |
| CN114159960A (en) * | 2021-10-11 | 2022-03-11 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Alkaline slurry injection SO that can accurate measurement is adjusted3Removal equipment |
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