CN103170229A - Desulfurization and denitration integrated system of industrial kiln stove - Google Patents
Desulfurization and denitration integrated system of industrial kiln stove Download PDFInfo
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- CN103170229A CN103170229A CN2013100655653A CN201310065565A CN103170229A CN 103170229 A CN103170229 A CN 103170229A CN 2013100655653 A CN2013100655653 A CN 2013100655653A CN 201310065565 A CN201310065565 A CN 201310065565A CN 103170229 A CN103170229 A CN 103170229A
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Abstract
The invention relates to a desulfurization and denitration integrated system of an industrial kiln stove. The desulfurization and denitration integrated system is characterized in that a spray gun of an SNCR (selective non-catalytic reduction) denitration reductant spray atomizing device is arranged on the industrial kiln stove; the spray gun is connected with an SNCR denitration reductant preparation device; the SNCR denitration reductant preparation device is connected with the reductant inlet of an oxidization neutralization denitration reaction tower; and the inlet of the oxidization neutralization denitration reaction tower is connected with the outlet of a dust remover. The inlet of the dust remover is connected with the waste heat smoke outlet of the industrial kiln stove, the outlet of the oxidization neutralization denitration reaction tower is connected with a chimney, an ammonium salt pool is arranged beneath the oxidization neutralization denitration reaction tower, an ammonium salt outlet is formed on the bottom of the oxidization neutralization denitration reaction tower, the oxidization neutralization denitration reaction tower, is also provided with an ozone inlet, the ozone inlet is connected with the outlet of an ozone generation device, and the inlet of the ozone generation device is connected with the outlet of a liquid oxygen storage tank. By utilizing the desulfurization and denitration integrated system, a system is optimized, the simple, efficient and environmentally friendly desulfurization and denitration integrated system is realized, and the investment and the operating cost are also saved.
Description
Technical field
The present invention relates to a kind of Industrial Stoves desulfurization and denitrification integral system.
Background technology
The fuel such as coal are all the main consume fuel of Industrial Stoves all the time, and SO in coal-fired flue-gas
2, NO
XThe primary pollution source of atmosphere.In recent years, and along with carrying out of country " 12 " planning and going deep into of environmental protection work, nitrogen oxide is listed in the binding indicator system, requires total emission volumn to cut down 10%, and flue gas desulfurization and denitrification has also entered the important schedule that atmosphere is administered.Present most widely used denitrating flue gas skill is SCR technology and SNCR technology, and SCR technology denitration efficiency can reach more than 95%, but because investment is large, system complex, the reasons such as operating cost height, and inapplicable and Industrial Stoves.Although and that the SNCR denitration technology is invested is low, operating cost is few, and system is simple, and the scope of application is wide, and its denitration efficiency is very low, can not satisfy the discharge standard that country formulates.Have at present patent with SCR and SNCR denitration technology in conjunction with denitration, in this technology, still there are some drawbacks in the SCR denitration technology, because be applied in the industrial furnace smoke denitration, contain alkaline matter in flue gas, cause catalyst poisoning, reaction efficiency reduces, and needs frequently more catalyst changeout, the price of catalyst is very high, has greatly increased operating cost.SCR ammonia oxidation reaction tower inside a lot of tower trays that distributing, be covered with catalyst on tower tray in addition, causes flue gas resistance to increase, and kiln tail blower fan power consumption strengthens.So the gas denitrifying technology that non-secondary pollution, resource consumption are few, operating cost is low that research and development are fit to China's national situation is of great significance the NOX pollution problem tool that solves China.
China national Department of Intellectual Property disclosed that a kind of to be called in " a kind of cement kiln flue-gas denitration process and denitrification apparatus " publication number be 102512925A on June 27th, 2012, its desulfuration efficiency is high, but be applied on the cement kiln tail denitrating flue gas, contain alkaline matter in kiln exit gas, cause catalyst poisoning, reaction efficiency reduces, and needs frequently more catalyst changeout, the price of catalyst is very high, has greatly increased operating cost.
" a kind of SNCR denitrating system " publication number 102658022A that China national Department of Intellectual Property announces.Its system exists the escape of ammonia to increase, and the NOX percent reduction is reduced.NH
3Be high volatile volatile and noxious material, the escape of ammonia can cause new environmental pollution.
Summary of the invention
The object of the present invention is to provide a kind of without the escaping of ammonia and can improve a kind of Industrial Stoves desulfurization and denitrification integral system of Industrial Stoves production material quality.The present invention is mainly: with SNCR(SNCR reaction) organically combine with the denitration method in denitration method and oxidation.
To achieve these goals, the present invention adopts following technical scheme:
its Industrial Stoves are provided with the spray gun of SNCR denitrification reducing agent spraying atomizing device, this spray gun is connected with the reducing agent preparation facilities of SNCR denitration, this reducing agent preparation facilities also with in oxidation is connected with an import on the denitration reaction tower, also be connected with the deduster outlet with the import of denitration reaction tower flue gas in this oxidation, this deduster import can directly be connected with the waste heat flue gas outlet of Industrial Stoves, also can be connected with the waste heat flue gas outlet of Industrial Stoves by waste heat boiler, in described oxidation, outlet is connected with chimney with the denitration reaction tower flue gas, in this oxidation and denitration reaction tower bottom is provided with the ammonium salt pond, its bottom is provided with the ammonium salt outlet, this ammonium salt outlet can be connected with the ammonium salt liquid-solid separation device.Also be provided with the ozone import in above-mentioned oxidation He on the denitration reaction tower, it is connected with the ozone generating-device outlet, and this ozone generating-device import is connected with the outlet of liquid oxygen storage tank.The spray gun of above-mentioned SNCR denitrification reducing agent spraying atomizing device is evenly arranged along the vertical cross-section surrounding that flue gas in kiln passes through, this spray gun can flue gas passes through in kiln a vertical cross-section arrange, also can arrange at a plurality of vertical cross-sections, spray gun quantity is n, 1≤n≤20.Above-mentioned reducing agent is urea or ammoniacal liquor.
The course of work of the present invention is roughly as follows:
High-temperature flue gas is discharged from the afterbody of Industrial Stoves, the a large amount of nitrogen oxide and the sulfur dioxide that wherein burn and produce, at first adopt SNCR denitration method, when 850 ~ 1250 ℃ of industrial furnace smoke temperature ranges, spray in right amount by air-atomized reducing agent, make that in flue gas, a part of NOx is reduced to harmless N
2And H
2O is deviate from.the NOx that does not remove and remaining reducing agent are along with flue gas enters the kiln afterbody, at the flue gas afterbody, waste heat boiler is set and carries out exchange heat, flue-gas temperature is down to 120 ℃ of left and right and is entered deduster, adopt in oxidation between deduster and chimney and carry out desulfurization and denitration with the denitration method, namely allow the high concentration oxygen in liquid oxygen storage tank produce ozone through ozone generating-device, be ejected in oxidation with in the denitration reaction tower nitric oxide Quick Oxidation in flue gas is become nitrogen dioxide, simultaneously the sulfur dioxide Quick Oxidation in flue gas is become sulfur trioxide, the SNCR denitrification reducing agent be ejected in oxidation through the jet atomization device simultaneously and the denitration reaction tower in, so gaseous ammonia, the nitrogen oxide of vaporous water and gaseous state and oxysulfide be the synthetic ammonium salt of reaction rapidly, ammonium salt and oarse-grained dust granules are deposited in the ammonium salt pond by the crystallization pump and are pumped into during the ammonium salt liquid-solid separation device separates, and final products are nitrogenous fertilizer, clean flue gas enters chimney through air-introduced machine.
The present invention compared with prior art has following advantage:
1, due to in the oxidation of SNCR denitration method and the denitration method organically combine, at first take full advantage of the hot conditions in Industrial Stoves, spray into appropriate reducing agent at Industrial Stoves, remove a part of NOx in flue gas, reduce the live load of ammonia oxidation, make in follow-up oxidation to reduce with denitration method reaction tower scale, especially reduce the consumption of oxidant, reduced operating cost, its denitrification efficiency all can reach more than 90%;
2, efficiency of dust collection can reach more than 90%, and kiln exit gas pm emission dust concentration is much smaller than 50mg/Nm3.Industry kiln stove tail dust pelletizing system adopts electric precipitation substantially, the up-to-date regulation flue gas particle of national standard dust concentration 50mg/Nm3, and electric precipitation can not meet requirement, must change a bag dedusting into, has greatly increased power consumption and operation expense but change bag dedusting into.As adopting the present invention technology, electric precipitation can meet the demands, and does not need to carry out kiln tail dedusting electricity and changes the bag transformation.Adopt this invention technology can obviously reduce equipment investment by calculating.
3, the byproduct of desulphurization denitration acquisition is that ammonium nitrate and ammonium sulfate can be used as chemical fertilizer, can take full advantage of the reducing agent that consumes, and saves operating cost.
Description of drawings
Fig. 1 is the inventive example 1 flow process simplified schematic diagram.
Fig. 2 is that the spray gun of SNCR denitrification reducing agent spraying atomizing device in the inventive example 1 is arranged simplified schematic diagram.
Fig. 3 is the inventive example 2 flow process simplified schematic diagram.
Fig. 4 is the inventive example 3 flow process simplified schematic diagram.
Attached number in the figure explanation
In 1-oxidation and the denitration reaction tower, 2-ammonium salt pond, 3-ammonium salt liquid-solid separation device, 4-ozone generating-device, the spray gun of 5-SNCR denitrification reducing agent spraying atomizing device, 6-liquid oxygen storage tank, 7-dore furnace, 8-rotary kiln, 9-rotary kiln end, 10-kiln tail Pyatyi preheater, 11-waste heat boiler, 12-deduster, 13-chimney, 14-SNCR denitrification reducing agent preparation facilities, 15-glass furnace, 16-ceramic kiln.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail:
In the flow process simplified schematic diagram of shown in Figure 1 cement kiln desulfurization and denitrification integral system, the cement rotary kiln tail is established dore furnace.This dore furnace is connected with the thermal medium entrance of cement slurry preheater, this preheater is plural serial stage, afterbody preheater hot media outlet is connected with the deduster import, between is established waste heat boiler, be connected with denitration method reaction tower gas approach in the outlet of this deduster and oxidation, be connected with chimney with denitration method reaction tower exhanst gas outlet in this oxidation, establish air-introduced machine between the two.In this oxidation and denitration method reaction tower bottom is provided with the ammonium salt pond, its bottom is provided with the ammonium salt outlet, be provided with the reducing agent import with the denitration reaction tower in this oxidation, it is connected with an outlet of SNCR denitrification reducing agent preparation facilities, another outlet of this reducing agent preparation facilities also be located at dore furnace on the spray gun entrance of 6 SNCR denitrification reducing agent spraying atomizing devices be connected.The layout sketch of the spray gun of the SNCR denitrification reducing agent spraying atomizing device on dore furnace is seen Fig. 2.Also be provided with the ozone import in above-mentioned oxidation He on the denitration reaction tower, it is connected with the ozone generating-device outlet, and this ozone generating-device import is connected with the outlet of liquid oxygen storage tank.
In the flow process simplified schematic diagram of shown in Figure 3 glass furnace desulfurization and denitrification integral system, the outlet of glass furnace body tail flue gas is connected with the exhaust-heat boiler flue gas import, the exhaust-heat boiler flue gas outlet is connected with the deduster import, in the outlet of this deduster and oxidation, import is connected with the denitration reaction tower flue gas, in this oxidation, outlet is connected with chimney with the denitration reaction tower flue gas, establishes air-introduced machine between the two.In this oxidation and denitration reaction tower bottom is provided with the ammonium salt pond, its its bottom is provided with the ammonium salt outlet, be provided with the reducing agent import with the denitration reaction tower in this oxidation, it is connected with an outlet of SNCR denitrification reducing agent preparation facilities, another outlet of this reducing agent preparation facilities also be located at glass furnace on the spray gun entrance of SNCR denitrification reducing agent spraying atomizing device be connected.Also be provided with the ozone import in oxidation He on the denitration reaction tower, it is connected with the ozone generating-device outlet, and this ozone generating-device import is connected with the outlet of liquid oxygen storage tank.
In the flow process simplified schematic diagram of shown in Figure 4 furnace desulfurization and denitrification integral system, the outlet of furnace body tail flue gas is connected with the exhaust-heat boiler flue gas import, the exhaust-heat boiler flue gas outlet is connected with the deduster import, in the outlet of this deduster and oxidation, import is connected with the denitration reaction tower flue gas, in this oxidation, outlet is connected with chimney with the denitration reaction tower flue gas, establishes air-introduced machine between the two.In this oxidation and denitration reaction tower bottom is provided with the ammonium salt pond, its bottom is provided with the ammonium salt outlet, be provided with the reducing agent import with the denitration reaction tower in oxidation, it is connected with an outlet of reducing agent preparation facilities, another outlet of this reducing agent preparation facilities also be located at ceramic kiln on the spray gun entrance of SNCR denitrification reducing agent spraying atomizing device be connected.Also be provided with the ozone import in oxidation He on the denitration reaction tower, it is connected with the ozone generating-device outlet, and this ozone generating-device import is connected with the outlet of liquid oxygen storage tank.
Claims (5)
1. Industrial Stoves desulfurization and denitrification integral system, it is characterized in that: its Industrial Stoves are provided with the spray gun of SNCR denitrification reducing agent spraying atomizing device, this spray gun is connected with the reducing agent preparation facilities of SNCR denitration, this reducing agent preparation facilities also with in oxidation is connected with an import on the denitration reaction tower, also be connected with the deduster outlet with the import of denitration reaction tower flue gas in this oxidation, this deduster import is connected with the waste heat flue gas outlet of Industrial Stoves, in described oxidation, outlet is connected with chimney with the denitration reaction tower flue gas, in this oxidation and denitration reaction tower bottom is provided with the ammonium salt pond, its bottom is provided with the ammonium salt outlet, also be provided with the ozone import in above-mentioned oxidation He on the denitration reaction tower, it is connected with the ozone generating-device outlet, this ozone generating-device import is connected with the outlet of liquid oxygen storage tank.
2. a kind of Industrial Stoves desulfurization and denitrification integral according to claim 1 system, it is characterized in that: the spray gun of described SNCR denitrification reducing agent spraying atomizing device is evenly arranged along the vertical cross-section surrounding that flue gas in kiln passes through, spray gun quantity is n, 1≤n≤20.
3. according to claim 1 with 4 described a kind of Industrial Stoves desulfurization and denitrification integral systems, it is characterized in that: the vertical cross-section that the spray gun of described SNCR denitrification reducing agent spraying atomizing device can flue gas passes through in kiln is arranged, also can arrange at a plurality of vertical cross-sections.
4. a kind of Industrial Stoves desulfurization and denitrification integral according to claim 1 system, is characterized in that: establish waste heat boiler between described Industrial Stoves waste heat flue gas outlet and deduster import.
5. a kind of Industrial Stoves desulfurization and denitrification integral according to claim 1 system, it is characterized in that: the pond outlet of described ammonium salt is connected with the ammonium salt liquid-solid separation device.
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| CN2013100655653A CN103170229A (en) | 2013-03-01 | 2013-03-01 | Desulfurization and denitration integrated system of industrial kiln stove |
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| CN2013100655653A CN103170229A (en) | 2013-03-01 | 2013-03-01 | Desulfurization and denitration integrated system of industrial kiln stove |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341306A (en) * | 2013-07-24 | 2013-10-09 | 上海交通大学 | Lean ammonia SNCR (Selective Non-Catalytic Reduction) and oxidation absorption combined denitration and demercuration method |
| CN103406006A (en) * | 2013-08-30 | 2013-11-27 | 安徽省元琛环保科技有限公司 | SCR (Selective Catalytic Reduction) denitration device for NOx control of rotary cement kiln |
| CN103977695A (en) * | 2014-06-05 | 2014-08-13 | 株洲三特环保节能股份有限公司 | Method and system for removing nitric oxide from flue gas in cement kiln |
| CN105561754A (en) * | 2016-02-18 | 2016-05-11 | 山东巨亚环保科技股份有限公司 | Boiler denitration device |
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| CN102489129A (en) * | 2011-12-14 | 2012-06-13 | 山东中玻节能环保发展有限公司 | Industrial flue gas purification, desulfurization and denitrification integrated device and working method thereof |
| CN102661667A (en) * | 2012-05-31 | 2012-09-12 | 河南中材环保有限公司 | System and method for denitration, residual heat utilization and dedusting of cement kiln |
| CN202725014U (en) * | 2012-06-26 | 2013-02-13 | 肖开标 | Energy-saving denitration device for cement dry kiln |
| CN203264548U (en) * | 2013-03-01 | 2013-11-06 | 大连易世达新能源发展股份有限公司 | Industrial kiln desulfurization denitrification integrated system |
-
2013
- 2013-03-01 CN CN2013100655653A patent/CN103170229A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489129A (en) * | 2011-12-14 | 2012-06-13 | 山东中玻节能环保发展有限公司 | Industrial flue gas purification, desulfurization and denitrification integrated device and working method thereof |
| CN102661667A (en) * | 2012-05-31 | 2012-09-12 | 河南中材环保有限公司 | System and method for denitration, residual heat utilization and dedusting of cement kiln |
| CN202725014U (en) * | 2012-06-26 | 2013-02-13 | 肖开标 | Energy-saving denitration device for cement dry kiln |
| CN203264548U (en) * | 2013-03-01 | 2013-11-06 | 大连易世达新能源发展股份有限公司 | Industrial kiln desulfurization denitrification integrated system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341306A (en) * | 2013-07-24 | 2013-10-09 | 上海交通大学 | Lean ammonia SNCR (Selective Non-Catalytic Reduction) and oxidation absorption combined denitration and demercuration method |
| CN103341306B (en) * | 2013-07-24 | 2015-12-09 | 上海交通大学 | A kind of method of poor ammonia SNCR reduction and oxidative absorption combined denitration demercuration |
| CN103406006A (en) * | 2013-08-30 | 2013-11-27 | 安徽省元琛环保科技有限公司 | SCR (Selective Catalytic Reduction) denitration device for NOx control of rotary cement kiln |
| CN103977695A (en) * | 2014-06-05 | 2014-08-13 | 株洲三特环保节能股份有限公司 | Method and system for removing nitric oxide from flue gas in cement kiln |
| CN105561754A (en) * | 2016-02-18 | 2016-05-11 | 山东巨亚环保科技股份有限公司 | Boiler denitration device |
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Application publication date: 20130626 |