CN112169574A - Coal fired boiler SOx/NOx control clean system - Google Patents
Coal fired boiler SOx/NOx control clean system Download PDFInfo
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- CN112169574A CN112169574A CN201910604309.4A CN201910604309A CN112169574A CN 112169574 A CN112169574 A CN 112169574A CN 201910604309 A CN201910604309 A CN 201910604309A CN 112169574 A CN112169574 A CN 112169574A
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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
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
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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
- B01D53/007—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 irradiation
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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
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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
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/10—Treating solid fuels to improve their combustion by using additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
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- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
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- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
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- Combustion & Propulsion (AREA)
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Abstract
The invention relates to a desulfurization, denitrification and purification system of a coal-fired boiler, which comprises an air blower, a boiler, an induced draft fan, a desulfurization tower, a chimney, a slurry tank and a coal yard which are connected in sequence; the coal yard continuously provides boiler coal supply, and the slurry tank not only provides wastewater collection and precipitation of the desulfurizing tower, but also provides spraying circulating water for the desulfurizing tower and humidifying water for the coal yard; wherein: an air filter is arranged at an air inlet of the blower and used for filtering and activating combustion air supply of the boiler; and a water purifier is arranged at the outlet end of the circulating spray water of the slurry tank, and is used for filtering and activating spray water of a coal yard and a desulfurizing tower. In the traditional boiler equipment for removing the sulfur and the nitrate, the activation treatment on the air and the circulating water is added, and the ceramic particles irradiated by high-frequency infrared rays directly act on the air and the flowing water, so that the fuel value and the emission reduction effect are improved.
Description
The technical field is as follows:
the invention belongs to the field of energy environmental protection, and particularly relates to a desulfurization, denitrification and purification system of a coal-fired boiler, which is used for enabling emission to reach the standard through treatment of gas supply and water supply on the basis of a traditional system.
Background art:
the existing desulfurization and denitrification purification equipment and method for coal-fired boilers are designed to be very complete and comprise oxidation, desulfurization, denitrification and the like. Such as: patent No. 201510304368.1 discloses a purification system for boiler flue gas denitration, which comprises a boiler, a dust remover, a desulfurizing tower and a chimney which are connected in sequence; the boiler hearth is connected with a denitration reducing agent injection module, and the dust remover is connected with the desulfurization tower through a desulfurization tower inlet flue; the device also comprises an ozone injection device and a static mixer which are arranged in the inlet flue of the desulfurizing tower in sequence along the flowing direction of the flue gas, an ozone generator connected with the ozone injection device and an air separation device connected with the ozone generator. And is roughly completed by the following three steps: firstly, carrying out oxidation-reduction reaction on a denitration reducing agent sprayed by a reducing agent spraying module to preliminarily remove oxynitride; secondly, oxidizing the low-valence nitrogen oxide into high-valence nitrogen oxide which is easily dissolved in water by ozone; and thirdly, water is sprayed for desulfurization and demisting, and the mixture is discharged into the atmosphere through a chimney.
And patent application No. 201510506429.2 discloses a method for realizing a boiler flue gas integrated distributed desulfurization and denitrification process, which comprises the following steps: firstly, flue gas enters a desulfurization tower from the lower part after passing through a dust remover, slurry in a slurry pool is conveyed to a nozzle at the upper part of the desulfurization tower through a circulating pump for spraying, and the purified flue gas enters an oxidation tower after being demisted by a demister; secondly, the flue gas enters the oxidation tower from the top, the slurry in the slurry pool is conveyed to a nozzle at the upper part of the oxidation tower through a circulating pump for spraying, and the oxidized flue gas enters the denitrification tower after passing through a wire mesh demister; and step three, enabling the flue gas to enter a denitration tower from the lower part, spraying 3 layers in the tower, conveying the slurry of the first layer and the slurry of the third layer to a lower layer nozzle through a circulating pump for spraying, spraying the slurry of the second layer by externally connecting H2O2 solution, achieving the process of firstly absorbing, then oxidizing and then absorbing, and discharging the purified flue gas through a chimney after demisting by a demister above the denitration tower.
In the two typical patent applications, spraying is adopted no matter denitration or desulfurization, and slurry circulating spraying is the most economical method. How to pretreat the slurry to achieve better desulfurization and denitrification effects becomes the object of the research of the invention.
The invention content is as follows:
the invention aims to design a coal-fired boiler desulfurization and denitrification purification system which is provided with an air filter at the end of a boiler blower and a water purifier in a slurry tank.
The technical scheme of the invention is realized as follows: a desulfurization and denitrification purification system of a coal-fired boiler comprises an air blower, a boiler, an induced draft fan, a desulfurization tower and a chimney which are sequentially connected, a slurry tank and a coal yard; the coal yard continuously provides boiler coal supply, and the slurry tank not only provides wastewater collection and precipitation of the desulfurizing tower, but also provides spraying circulating water for the desulfurizing tower and humidifying water for the coal yard; the method is characterized in that: an air filter is arranged at an air inlet of the blower and used for filtering and activating combustion air supply of the boiler; and a water purifier is arranged at the outlet end of the circulating spray water of the slurry tank, and is used for filtering and activating spray water of a coal yard and a desulfurizing tower.
The air filter has the same structure as the water purifier and comprises a shell and a plurality of pipelines, wherein the plurality of pipelines are uniformly distributed and embedded between two end faces of the shell, and the pipelines form a ventilation or water flowing channel; the shell is filled with ceramic particles irradiated by high-frequency infrared rays.
The air filter water purifier has the same structure and comprises a support and double-layer pipelines, wherein the double-layer pipelines are uniformly distributed and locked on the support; the double-layer pipeline comprises an inner pipe, an outer pipe, two end covers and ceramic particles which are filled between the inner pipe and the outer pipe and are irradiated by high-frequency infrared rays; the ventilation or running water flows through the inner hole and the outer surface through the double-layer pipe to form air filtration and water purification.
The shape of the shell or the bracket of the air filter is matched with the air inlet of the blower and is locked on the air inlet.
The shell or the support of the water purifier is of a rectangular structure, can be densely distributed at the water outlet end of the slurry tank in an array mode, and is at least provided with two rows of water purifiers.
In the traditional boiler denitration equipment, the activation treatment on air and circulating water is added, so that the fuel value and the emission reduction effect are improved; utilize through the infrared ceramic particle of shining of high frequency, can direct production effect of convection current through air and water, the high frequency resonance air promotes that the coal burning is clean, and becomes the circulating water of micro-molecular group through high frequency resonance, is used for spraying the humidification for the fire coal on the one hand, and the burning is more abundant, and on the other hand provides the desulfurization with micro-molecular group circulation and sprays, has higher SOx/NOx control efficiency, also reduces the denitration reductant quantity.
Description of the drawings:
the invention is further illustrated with reference to the following specific figures:
FIG. 1 is a schematic diagram of a desulfurization and denitrification purification system of a coal-fired boiler
FIG. 2 schematic view of an air cleaner
FIG. 3 schematic diagram of a water purifier
FIG. 4 is a schematic view of an air cleaner
FIG. 5 is a schematic view of the relationship between the bracket and the double-layered pipe
FIG. 6 is an exploded view of a double-layered pipeline
Wherein
1-blower 2-boiler 3-draught fan 4-desulfurizing tower
5-chimney 6-slurry pool 7-coal yard 8-air filter
81-housing 82-pipeline 83-ceramic particle 84-support
85-double-layer pipeline 851-inner pipe 852-outer pipe 853-end cap
9-Water purifier
The specific implementation mode is as follows:
referring to fig. 1, the desulfurization, denitrification and purification system of the coal-fired boiler comprises an air blower 1, a boiler 2, an induced draft fan 3, a desulfurization tower 4, a chimney 5, a slurry tank 6 and a coal yard 7 which are connected in sequence; the coal yard 7 continuously provides the fuel coal supply of the boiler 2, and the fuel coal stored in the coal yard can increase necessary spraying humidification according to the humidity requirement of the boiler so as to promote the combustion effect; the slurry tank 6 not only provides wastewater collection and precipitation for the desulfurizing tower 4, but also provides spraying circulating water for the desulfurizing tower 4 and humidifying water for the coal yard 7, reduces the use amount of clean water and can also reduce emission.
Wherein, an air filter 8 is arranged at the air inlet of the blower 1 to filter and activate the combustion air supply of the boiler 2; the slurry tank 6 is provided with a water purifier 9 at the outlet end of the circulating spray water, and the spray water for the coal yard 7 and the desulfurizing tower 4 is filtered and activated. More specifically, the air cleaner and the water purifier are substantially identical in structure except for the difference in external shape, and have the following two types:
first, as shown in fig. 2 and 3, the device comprises a housing 81 and a plurality of pipes 82, wherein the plurality of pipes 82 are uniformly distributed and embedded between two end faces of the housing 81, and the pipes 82 form a ventilation or water flowing channel; ceramic particles 83 irradiated by high-frequency infrared rays are filled in the shell 81, and the infrared energy stored by the ceramic particles 83 is utilized to generate high-frequency resonance activated air for continuously and continuously treating the air and the water flowing through the pipeline 82 so as to promote the full combustion of the fire coal; and circulating water is changed into a micro-molecular group state, so that the absorption efficiency of the desulfurizing tower can be improved, the desulfurizing tower is used for spraying fire coal, and the effects of synergism and emission reduction can be realized. FIG. 2 shows an air cleaner, which is a circular structure, and is fitted with and locked to an air inlet of the blower 1; fig. 3 is a water purifier, the appearance is rectangle, can be densely arranged at the water outlet end of the slurry pool in an array manner, and at least two rows of water purifiers are arranged, so that the existence of ineffective gaps is reduced.
Secondly, as shown in fig. 4, 5 and 6, the device comprises a bracket 84 and a double-layer pipeline 85, wherein a plurality of double-layer pipelines 85 are uniformly distributed and locked on the bracket 84; referring to fig. 6, the double-layered pipe 85 includes an inner pipe 851, an outer pipe 852, end caps 853, and ceramic particles 83 filled between the inner and outer pipes and irradiated with high-frequency infrared rays; the ventilation or running water flows through the inner and outer surfaces of the double-layer tube through 85 to form air filtration and water purification. That is, the bracket 84 only functions to support and maintain the spacing of the double-layer pipes 85 by utilizing the inner and outer surfaces of the double-layer pipes 85 to generate equivalent resonance and transduction for air and water.
In fig. 4, the double-layer pipes 85 are distributed radially, and air and water flow can flow from the radial direction and the axial direction, so that the double-layer pipes are suitable for being used as air filters.
In fig. 5, the double-layer pipeline 85 adopts a parallel array mode, the bracket 84 is formed by a front hollow-out plate and a rear hollow-out plate or a rope woven net, and can be directly hung at the front end of the air inlet, or the shape of the bracket is processed into a rectangular shape and hung in the slurry tank 6 to form the water body filtering effect.
Claims (5)
1. A desulfurization and denitrification purification system of a coal-fired boiler comprises an air blower, a boiler, an induced draft fan, a desulfurization tower and a chimney which are sequentially connected, a slurry tank and a coal yard; the coal yard continuously provides boiler coal supply, and the slurry tank not only provides wastewater collection and precipitation of the desulfurizing tower, but also provides spraying circulating water for the desulfurizing tower and humidifying water for the coal yard; the method is characterized in that: an air filter is arranged at an air inlet of the blower and used for filtering and activating combustion air supply of the boiler; and a water purifier is arranged at the outlet end of the circulating spray water of the slurry tank, and is used for filtering and activating spray water of a coal yard and a desulfurizing tower.
2. The desulfurization, denitrification and purification system for the coal-fired boiler according to claim 1, wherein: the air filter has the same structure as the water purifier and comprises a shell and a plurality of pipelines, wherein the plurality of pipelines are uniformly distributed and embedded between two end faces of the shell, and the pipelines form a ventilation or water flowing channel; the shell is filled with ceramic particles irradiated by high-frequency infrared rays.
3. The desulfurization, denitrification and purification system for the coal-fired boiler according to claim 1, wherein: the air filter water purifier has the same structure and comprises a bracket and a double-layer pipeline, wherein the double-layer pipeline is uniformly distributed and locked on the bracket; the double-layer pipeline comprises an inner pipe, an outer pipe, two end covers and ceramic particles which are filled between the inner pipe and the outer pipe and are irradiated by high-frequency infrared rays; the ventilation or running water flows through the inner hole and the outer surface through the double-layer pipe to form air filtration and water purification.
4. The desulfurization, denitrification and purification system for a coal-fired boiler according to claim 1, 2 or 3, wherein: the shape of the shell or the bracket of the air filter is matched with the air inlet of the blower and is locked on the air inlet.
5. The desulfurization, denitrification and purification system for a coal-fired boiler according to claim 1, 2 or 3, wherein: the shell or the support of the water purifier is of a rectangular structure, can be densely distributed at the water outlet end of the slurry tank in an array manner, and is at least provided with two rows of water purifiers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910604309.4A CN112169574B (en) | 2019-07-05 | 2019-07-05 | Desulfurization and denitrification purifying system for coal-fired boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910604309.4A CN112169574B (en) | 2019-07-05 | 2019-07-05 | Desulfurization and denitrification purifying system for coal-fired boiler |
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| Publication Number | Publication Date |
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| CN112169574A true CN112169574A (en) | 2021-01-05 |
| CN112169574B CN112169574B (en) | 2024-08-06 |
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| CN201910604309.4A Active CN112169574B (en) | 2019-07-05 | 2019-07-05 | Desulfurization and denitrification purifying system for coal-fired boiler |
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| CN208886814U (en) * | 2018-10-02 | 2019-05-21 | 天津天恒达环保工程有限公司 | A kind of natural gas Sintering shaft kiln equipment for denitrifying flue gas |
| CN210752065U (en) * | 2019-07-05 | 2020-06-16 | 福建省坤宁环保工程有限公司 | Coal fired boiler SOx/NOx control clean system |
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2019
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| EP1358923A2 (en) * | 2002-05-03 | 2003-11-05 | Behr GmbH & Co. | Particle or hybrid filter, in particular for the treatment of air to be introduced in a vehicle passenger compartment |
| CN1880750A (en) * | 2005-06-14 | 2006-12-20 | 贾长青 | Infrared ceramic catalytic ion fuel catalytic desulfurization device |
| CN200973850Y (en) * | 2006-10-18 | 2007-11-14 | 绿阳工业(漳州)有限公司 | Air purifier capable of generating far infrared wave negative oxygen ions |
| CN101293178A (en) * | 2008-06-16 | 2008-10-29 | 河南海力特机电制造有限公司 | Heavy pressure fine spray desulfurising-dusting apparatus and method for desulfurization and dust removal |
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| CN102583802A (en) * | 2011-01-14 | 2012-07-18 | 大连源泰水处理设备有限公司 | Improved structure of water purifying machine |
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| CN105879635A (en) * | 2015-01-19 | 2016-08-24 | 无锡市东优环保科技有限公司 | Boiler flue gas desulfurization and denitrification device |
| CN106540500A (en) * | 2015-09-17 | 2017-03-29 | 哈尔滨市金京锅炉有限公司 | A kind of boiler waste gas treating device |
| CN106268133A (en) * | 2016-08-28 | 2017-01-04 | 浙江浩普环保工程有限公司 | Flue gas pollutant works in coordination with advanced purification system |
| CN106421863A (en) * | 2016-10-31 | 2017-02-22 | 李磊 | Preparation method for manufacturing sterile and purified air through terahertz household appliance |
| CN106678850A (en) * | 2017-01-06 | 2017-05-17 | 侯勇 | Desulfurating water waste heat recovering and utilizing system for boiler |
| CN206621975U (en) * | 2017-04-07 | 2017-11-10 | 山东东方宏业化工有限公司 | A kind of equipment for denitrifying flue gas |
| CN107142789A (en) * | 2017-05-16 | 2017-09-08 | 江力 | It is a kind of to improve engine energy consumption and the fuel filter of discharge |
| CN106975338A (en) * | 2017-05-17 | 2017-07-25 | 佛山瑞箭体育器材有限公司 | A kind of intelligent spray formula desulfurization and dust-removal method and its device |
| US10112145B1 (en) * | 2017-09-07 | 2018-10-30 | Jiangnan Environmental Protection Group Inc. | Method for controlling aerosol production during absorption in ammonia desulfurization |
| CN208526267U (en) * | 2018-04-18 | 2019-02-22 | 盐城中南华晟环保科技有限公司 | A kind of gas burning kiln flue gas purification device |
| CN208886814U (en) * | 2018-10-02 | 2019-05-21 | 天津天恒达环保工程有限公司 | A kind of natural gas Sintering shaft kiln equipment for denitrifying flue gas |
| CN210752065U (en) * | 2019-07-05 | 2020-06-16 | 福建省坤宁环保工程有限公司 | Coal fired boiler SOx/NOx control clean system |
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| Publication number | Publication date |
|---|---|
| CN112169574B (en) | 2024-08-06 |
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