CN205392136U - Denitration of coke oven flue gas low temperature is desulfurated integrated device in coordination - Google Patents
Denitration of coke oven flue gas low temperature is desulfurated integrated device in coordination Download PDFInfo
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- CN205392136U CN205392136U CN201620207236.7U CN201620207236U CN205392136U CN 205392136 U CN205392136 U CN 205392136U CN 201620207236 U CN201620207236 U CN 201620207236U CN 205392136 U CN205392136 U CN 205392136U
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Abstract
The utility model relates to a denitration of coke oven flue gas low temperature is desulfurated integrated device in coordination, it is main including the absorption tower, the flue gas heat sink, ozone body distributor, oxidation air blower, the solid -liquid separation ware, the liquid -liquid separation ware, self -control oxygen unit, the ammonium salt dissolving tank, aqueous ammonia solution pond, ozone body distributor links the below on the absorption tower, the bottom and the oxidation air blower interconnect on absorption tower, the flue gas heat sink be with the fan after coke oven residual heat from flue gas device link to each other, aqueous ammonia solution pond directly links in the left side bottom on absorption tower. The absorption tower bottom is equipped with aqueous ammonia supply port, the utility model discloses enable the produced flue gas of gas boiler under low temperature, the treatment effect reaches higher desulfurization degree, denitration efficiency and dust removal efficiency.
Description
Technical field
This utility model relates to Environmental-protecting treater field, particularly relates to the integrated apparatus of a kind of coke oven flue gas low-temperature denitration coordinated desulfurization.
Background technology
Along with the development of technology, current domestic coking industry in continuous progress, but, while progressive, also environment to external world causes certain pollution.The coke oven flue gas produced due to coke oven carries out high altitude discharge by stove chimney mostly, so sulfur dioxide contained in coke oven flue gas and nitrogen oxides are without purified treatment, are directly discharged in air, health and atmospheric environment are caused serious harm.
In an atmosphere, sulfur dioxide can be oxidized and form sulfuric acid mist or sulfate aerosol, being the important precursor of environmental acidification, and eye and respiratory mucosa are had strong impulse effect, a large amount of suction can cause pulmonary edema, the laryngeal edema, vocal cords spasm to cause and suffocate.Dust in sulfur dioxide and air has synergism, such as smog episode in london, Maas river valley event and many Nolas smog episode, is all the harm that causes of this synergism.Nitrogen oxides is mainly based on nitric oxide and nitrogen dioxide, and it is the major reason forming photochemical fog and acid rain.Nitrogen oxides and the water in air react the nitric acid generated and nitrous acid is the composition of acid rain.The respiratory tract of nitrogen oxides major determinant people.Under irradiation by sunlight, nitrogen oxides in air, between Hydrocarbon and ozone, occur a series of photochemical reaction to generate blue smog, be sometimes with a little purple or yellowish-brown.
The desulfurization technology that current air contaminant treatment is generally taked has several classes such as dry method, semidry method and wet method.There is the shortcoming that desulfuration efficiency is not high in dry method and semidry method.Conventional wet sulfur removal technology desulfuration efficiency is high, and technology maturation is used widely, for instance desulfurization by lime gypsum method in coal-fired electric generation furnace smoke gas treatment, ammonia process of desulfurization etc..In coking industry, due to coke oven flue gas self, exhaust gas volumn is relatively little, flue gas is relatively low containing sulphur concentration, carries out independent desulfurization will increase equipment investment expense and operating cost if being further added by a set of desulfurizer.Therefore, research and develop a kind of be suitable for coke oven flue gas can carry out in same purifier high efficiency low-temperature denitration simultaneously again can the integrated apparatus of a kind of coke oven flue gas low-temperature denitration coordinated desulfurization of high efficiency desulfurization, there is boundless prospects for commercial application.
Utility model content
The utility model discloses the integrated apparatus of a kind of coke oven flue gas low-temperature denitration coordinated desulfurization.
Technical problem to be solved in the utility model is, for above-mentioned situation, the integrated apparatus of a kind of coke oven flue gas low-temperature denitration coordinated desulfurization is provided, this device can make flue gas produced by coking industry coke oven reach higher denitration efficiency and desulfuration efficiency, make concentration of emission requirement of special emission limit far below in " coking chemistry emission of industrial pollutants standard " (GB16171-2012) of coke oven flue gas nitrogen oxides and sulfur dioxide, native system device does not need high temperature section, cost of investment is low, energy expenditure is low, non-secondary pollution and economic benefit can be reclaimed, easy to use and easy to maintenance.
nullThe technical scheme that this utility model solves above-mentioned technical problem is as follows: the integrated apparatus of a kind of coke oven flue gas low-temperature denitration coordinated desulfurization，Including absorption tower、Smoke temperature reducer、Ozone gas distributor、Oxidation fan、Solid-liquid separator、Liquid liquid Separation device，The side on absorption tower is connected with coke-oven plant's chimney，It is characterized in that: also include self-control oxygen cell、Ammonium salt dissolving tank、Ammonia spirit pond and based element mixing body anticorrosion，Described self-control oxygen cell、Ozonator、Ozone gas distributor is sequentially connected with，Described ozone gas distributor is connected in the lower section on absorption tower，The bottom on described absorption tower and oxidation fan are connected with each other，The inwall on described absorption tower adopts absorption tower based element mixing body anticorrosion，Described smoke temperature reducer is be connected with the smoke waste heat recycling device for coke oven after blower fan，The lower right-hand side on described absorption tower is sequentially connected with solid-liquid separator、Liquid liquid Separation device and suction and ammonium salt solution pond，Described ammonia spirit pond is directly connected in the left bottom on absorption tower.
Further, low temperature organic catalyst is loaded in described absorption tower.
Further, described device is provided with safety-valve in the position flowing to coke-oven plant's chimney.
Further, ammonia supply mouth it is provided with bottom described absorption tower.
Further, described device adopts self-control oxygen cell to prepare ozone as the unstripped gas of Ozone generation to be used as oxidation of nitric oxide agent.
On the basis of technique scheme, this utility model can also do following improvement.
Further, it is provided with smoke temperature reducer in described flue, described smoke temperature reducer can adopt nozzle or two-fluid spray gun atomizing cooling method, and when flue-gas temperature is lower than 130 DEG C after smoke waste heat recycling device for coke oven, can not set smoke temperature reducer in described flue.
Further, described Liquid liquid Separation device, the method for quiescent settling can be adopted to realize the separation of low temperature organic catalyst and saline solution.
The beneficial effects of the utility model: the integrated device of this utility model, are systematically completed whole for low-temperature denitration coordinated desulfurization process by this device.Self-control oxygen cell, ozonator, ozone gas distributor are sequentially connected, it is to avoid gas mixing and the impurity that causes exists.Ammonia supply mouth is had, so ammonia uses the ammonia of Hua Chan workshop, coke-oven plant recovery as ammonia source bottom absorption tower.
It is provided with safety-valve owing to this utility model is provided with safety-valve in the position flowing to coke-oven plant's chimney, so when of short duration breakdown maintenance, the safety-valve flowing to coke-oven plant's chimney can be opened, close under normal circumstances and flow to the safety-valve of coke-oven plant's chimney, open and flow to smoke waste heat recycling device for coke oven valve, the flue gas of coke-oven plant's coke oven can pass through blower fan, along smoke temperature reducer is installed and ozone gas distributor inflow absorption tower carry out desulphurization denitration after enter back into coke-oven plant's chimney.
Native system device achieves real low-temperature denitration, it is not necessary to high temperature section, it is not necessary to former flue gas generation systems device is done any change, ozone and low temperature organic catalyst combined effect, namely achieves the low-temperature denitration to flue gas the temperature range of 20-130 DEG C.In same desulphurization system, it is possible to there is denitration, desulfurization simultaneously, sulfur dioxide can be made: 10mg/Nm3Hereinafter, nitrogen oxides: 30mg/Nm3Below, it is also possible to reduce the pollution reduction effects such as final dusting.Owing to this utility model have employed reactive group reason and the integrated apparatus of uniqueness, and by adopting the back reaction that low temperature organic catalyst can effectively stop ite to decompose to occur, and without ammonia process of desulfurization intermediate product NH4SO3Generation, thus effectively avoid flue gas hangover, the escaping of ammonia phenomenon generation.
To sum up, this utility model is easy to use and easy to maintenance, is suitable for being widely used in recycling of the exhaust-gas treatment of coking industry and product.
Accompanying drawing explanation
Fig. 1 is the structural representation of the integrated apparatus of a kind of coke oven flue gas low-temperature denitration coordinated desulfurization of this utility model
Wherein 1 is absorption tower, and 2 is smoke temperature reducer, and 3 is ozone gas distributor, 4 is ozonator, 5 self-control oxygen cell, and 6 is oxidation fan, 7 is solid-liquid separator, and 8 is Liquid liquid Separation device, and 9 is flue, 10 is coke-oven plant's coke oven, and 11 is smoke waste heat recycling device for coke oven, and 12 is blower fan, 13 is coke-oven plant's chimney, 14 is based element mixing body anticorrosion, and 15 is ammonium salt dissolving tank, and 16 is ammonia spirit pond.
Detailed description of the invention
Embodiment 1
As shown in Figure 1, a kind of integrated apparatus of coke oven flue gas low-temperature denitration coordinated desulfurization, including absorption tower (1), smoke temperature reducer (2), ozone gas distributor (3), oxidation fan (6), solid-liquid separator (7), Liquid liquid Separation device (8), smoke waste heat recycling device for coke oven (11), also includes self-control oxygen cell (5), ammonium salt dissolving tank (15), ammonia spirit pond (16) and based element mixing body anticorrosion (14).
Workflow: in the technique of low-temperature denitration coordinated desulfurization, mainly includes the following steps that.
Step one: coke oven flue gas passes through flue (9) after smoke temperature reducer (2) is cooled to 50 degree, then through gas distributor (3) and ozone reaction, subsequently into absorption tower (1)；
Step 2: gaseous oxygen enters ozonator (4) after being decompressed to 0.2MPa, the ozone gaseous mixture that ozonator (4) produces enters the lower nitrogen oxides in ozone gas distributor (3) the oxidation flue gas installed in flue, ozone gas distributor (3) in flue makes ozone and flue gas be fully contacted, the nitrogen oxides of flue gas state at a middle or low price enters absorption tower (1) after being oxidized to higher nitrogen oxides；
Step 3: flue gas moves vertically upward having in the absorption tower (1) preventing absorption tower based element mixing body anticorrosion (14) being corroded, reacts with the water in the mixed liquor of absorption tower (1) interior spraying layer ejection, generates H2SO3And HNO2, wherein, SO3 2-And NO2 -It is mixed the low temperature organic catalyst in liquid to catch, generates stable chelate, the SO under aerobic environment, in chelate3 2-And NO2 -Composition is oxidized to stable SO4 2-And NO3 -, and the ammonia reclaimed with Hua Chan workshop, coke-oven plant react the stable ammonium salt solution of generation, meanwhile, low temperature organic catalyst separates from chelate and reduces, and its absorption tower inwall is not corroded；
Step 4: when saline solution concentration reaches 40%, take out absorption tower (1) interior mixed liquor and filter a small amount of dust through solid-liquid separator (7), filtrate containing low temperature organic catalyst enters back into Liquid liquid Separation device (8) and carries out secondary separation, low temperature organic catalyst after Liquid liquid Separation is recycled to absorption tower (1) and recycles, ammonium liquid is sent into coke-oven plant sulfur ammonium drying system and is prepared and sell outside chemical fertilizer, and the flue gas after purification is from coke-oven plant's chimney (13) discharge up to standard.
Embodiment 2
As shown in Figure 1, a kind of integrated apparatus of coke oven flue gas low-temperature denitration coordinated desulfurization, including absorption tower (1), smoke temperature reducer (2), ozone gas distributor (3), oxidation fan (6), solid-liquid separator (7), Liquid liquid Separation device (8), smoke waste heat recycling device for coke oven (11), also includes self-control oxygen cell (5), ammonium salt dissolving tank (15), ammonia spirit pond (16) and based element mixing body anticorrosion (14).
Workflow: in the technique of low-temperature denitration coordinated desulfurization, mainly includes the following steps that.
Step one: coke oven flue gas passes through flue (9) after smoke temperature reducer (2) is cooled to 70 degree, then through gas distributor (3) and ozone reaction, subsequently into absorption tower (1)；
Step 2: gaseous oxygen enters ozonator (4) after being decompressed to 0.2MPa, the ozone gaseous mixture that ozonator (4) produces enters the lower nitrogen oxides in ozone gas distributor (3) the oxidation flue gas installed in flue, ozone gas distributor (3) in flue makes ozone and flue gas be fully contacted, the nitrogen oxides of flue gas state at a middle or low price enters absorption tower (1) after being oxidized to higher nitrogen oxides；
Step 3: flue gas moves vertically upward having in the absorption tower (1) preventing absorption tower based element mixing body anticorrosion (14) being corroded, reacts with the water in the mixed liquor of absorption tower (1) interior spraying layer ejection, generates H2SO3And HNO2, wherein, SO3 2-And NO2 -It is mixed the low temperature organic catalyst in liquid to catch, generates stable chelate, the SO under aerobic environment, in chelate3 2-And NO2 -Composition is oxidized to stable SO4 2-And NO3 -, and the ammonia reclaimed with Hua Chan workshop, coke-oven plant react the stable ammonium salt solution of generation, meanwhile, low temperature organic catalyst separates from chelate and reduces, and its absorption tower inwall is not corroded；
Step 4: when saline solution concentration reaches 40%, take out absorption tower (1) interior mixed liquor and filter a small amount of dust through solid-liquid separator (7), filtrate containing low temperature organic catalyst enters back into Liquid liquid Separation device (8) and carries out secondary separation, low temperature organic catalyst after Liquid liquid Separation is recycled to absorption tower (1) and recycles, ammonium liquid is sent into coke-oven plant sulfur ammonium drying system and is prepared and sell outside chemical fertilizer, and the flue gas after purification is from coke-oven plant's chimney (13) discharge up to standard.
Embodiment 3
As shown in Figure 1, a kind of integrated apparatus of coke oven flue gas low-temperature denitration coordinated desulfurization, including absorption tower (1), smoke temperature reducer (2), ozone gas distributor (3), oxidation fan (6), solid-liquid separator (7), Liquid liquid Separation device (8), smoke waste heat recycling device for coke oven (11), also includes self-control oxygen cell (5), ammonium salt dissolving tank (15), ammonia spirit pond (16) and based element mixing body anticorrosion (14).
Workflow: in the technique of low-temperature denitration coordinated desulfurization, mainly includes the following steps that.
Step one: coke oven flue gas passes through flue (9) after smoke temperature reducer (2) is cooled to 90 degree, then through gas distributor (3) and ozone reaction, subsequently into absorption tower (1)；
Step 2: gaseous oxygen enters ozonator (4) after being decompressed to 0.2MPa, the ozone gaseous mixture that ozonator (4) produces enters the lower nitrogen oxides in ozone gas distributor (3) the oxidation flue gas installed in flue, ozone gas distributor (3) in flue makes ozone and flue gas be fully contacted, the nitrogen oxides of flue gas state at a middle or low price enters absorption tower (1) after being oxidized to higher nitrogen oxides；
Step 3: flue gas moves vertically upward having in the absorption tower (1) preventing absorption tower based element mixing body anticorrosion (14) being corroded, reacts with the water in the mixed liquor of absorption tower (1) interior spraying layer ejection, generates H2SO3And HNO2, wherein, SO3 2-And NO2 -It is mixed the low temperature organic catalyst in liquid to catch, generates stable chelate, the SO under aerobic environment, in chelate3 2-And NO2 -Composition is oxidized to stable SO4 2-And NO3 -, and the ammonia reclaimed with Hua Chan workshop, coke-oven plant react the stable ammonium salt solution of generation, meanwhile, low temperature organic catalyst separates from chelate and reduces, and its absorption tower inwall is not corroded；
Step 4: when saline solution concentration reaches 40%, take out absorption tower (1) interior mixed liquor and filter a small amount of dust through solid-liquid separator (7), filtrate containing low temperature organic catalyst enters back into Liquid liquid Separation device (8) and carries out secondary separation, low temperature organic catalyst after Liquid liquid Separation is recycled to absorption tower (1) and recycles, ammonium liquid is sent into coke-oven plant sulfur ammonium drying system and is prepared and sell outside chemical fertilizer, and the flue gas after purification is from coke-oven plant's chimney (13) discharge up to standard.
Of the present utility model ultimate principle and principal character and of the present utility model advantage have more than been shown and described.Skilled person will appreciate that of the industry; this utility model is not restricted to the described embodiments; described in above-described embodiment and description is that principle of the present utility model is described; under the premise without departing from this utility model spirit and scope; this utility model also has various changes and modifications, and these changes and improvements both fall within the scope of claimed this utility model.This utility model claims scope and is defined by the following claims.
Claims (4)
- null1. the integrated apparatus of a coke oven flue gas low-temperature denitration coordinated desulfurization，Including absorption tower、Smoke temperature reducer、Ozone gas distributor、Oxidation fan、Solid-liquid separator、Liquid liquid Separation device，The side on absorption tower is connected with coke-oven plant's chimney，It is characterized in that: also include self-control oxygen cell、Ammonium salt dissolving tank、Ammonia spirit pond and based element mixing body anticorrosion，Described self-control oxygen cell、Ozonator、Ozone gas distributor is sequentially connected with，Described ozone gas distributor is connected in the lower section on absorption tower，The bottom on described absorption tower and oxidation fan are connected with each other，The inwall on described absorption tower adopts absorption tower based element mixing body anticorrosion，Described smoke temperature reducer is be connected with the smoke waste heat recycling device for coke oven after blower fan，The lower right-hand side on described absorption tower is sequentially connected with solid-liquid separator、Liquid liquid Separation device and suction and ammonium salt solution pond，Described ammonia spirit pond is directly connected in the left bottom on absorption tower.
- 2. the integrated apparatus of a kind of coke oven flue gas low-temperature denitration coordinated desulfurization according to claim 1, it is characterised in that load low temperature organic catalyst in described absorption tower.
- 3. the integrated apparatus of a kind of coke oven flue gas low-temperature denitration coordinated desulfurization according to claim 1, it is characterised in that described device is provided with safety-valve in the position flowing to coke-oven plant's chimney.
- 4. the integrated apparatus of a kind of coke oven flue gas low-temperature denitration coordinated desulfurization according to claim 1, it is characterised in that be provided with ammonia supply mouth bottom described absorption tower.
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| CN201620207236.7U CN205392136U (en) | 2016-03-18 | 2016-03-18 | Denitration of coke oven flue gas low temperature is desulfurated integrated device in coordination |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106268230A (en) * | 2016-08-18 | 2017-01-04 | 山东铁雄冶金科技有限公司 | A kind of waste heat of coke-oven flue gas reclaim and purify system and technique |
| CN106422702A (en) * | 2016-10-31 | 2017-02-22 | 中钢集团鞍山热能研究院有限公司 | Desulfuration, denitration and energy conservation integrated purification system for coke oven flue gas and control method of system |
-
2016
- 2016-03-18 CN CN201620207236.7U patent/CN205392136U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106268230A (en) * | 2016-08-18 | 2017-01-04 | 山东铁雄冶金科技有限公司 | A kind of waste heat of coke-oven flue gas reclaim and purify system and technique |
| CN106422702A (en) * | 2016-10-31 | 2017-02-22 | 中钢集团鞍山热能研究院有限公司 | Desulfuration, denitration and energy conservation integrated purification system for coke oven flue gas and control method of system |
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Granted publication date: 20160727 Termination date: 20210318 |