CN211837254U - Integrated treatment equipment for treating coke oven flue gas - Google Patents
Integrated treatment equipment for treating coke oven flue gas Download PDFInfo
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- CN211837254U CN211837254U CN201921513995.6U CN201921513995U CN211837254U CN 211837254 U CN211837254 U CN 211837254U CN 201921513995 U CN201921513995 U CN 201921513995U CN 211837254 U CN211837254 U CN 211837254U
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- flue gas
- desulfurizer
- reaction zone
- waste heat
- coke oven
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Abstract
The utility model provides an integrated treatment device for coke oven flue gas treatment, two sides of a flue gas desulfurization device are provided with a flue gas dust removal device and a flue gas denitration device, one side of the flue gas dust removal device is provided with a flue gas inlet device, one side of the flue gas denitration device is provided with a flue gas waste heat recovery device, and one side of the flue gas waste heat recovery device is provided with a flue gas discharge device; the utility model has the advantages that: the flue gas reaction process does not generate the waste water problem, the reacted desulfurizer can be used for preparing a capital construction material or the desulfurizer again, secondary pollution is not generated, a particle desulfurizer is adopted, the moisture content in high-temperature flue gas is less, corrosion to equipment is reduced, meanwhile, an anticorrosive coating is added in the equipment, the service life of the equipment is prolonged, the waste heat of the flue gas is recycled through a flue gas waste heat recovery device, and the flue gas waste heat recovery device has higher economic benefit.
Description
Technical Field
The utility model relates to a flue gas treatment facility field especially relates to an integration treatment facility for coke oven flue gas is administered.
Background
Sulfur dioxide (SO2) and nitrogen oxides (NOx) in coal-fired flue gas are the main pollutants affecting the quality of the atmosphere; as the traditional coal chemical industry, many coking enterprises have not realized the effective treatment of the emission of the coke oven flue gas SO2 and NOx. The emission standard of pollutants for the coking chemical industry (GB16171-2012) issued on 27.6.2012, the nitrogen oxides discharged by a coke oven are listed as the control indexes of the emission of the atmospheric pollutants of coking enterprises in China for the first time, and the emission of particulate matters and sulfur dioxide is provided with more strict requirements. The sulfur dioxide discharged from the coke oven chimney is less than 50mg/m from 1 month and 1 day of 20153Nitrogen oxides less than 500mg/m3The sulfur dioxide in special emission areas is less than 30mg/m3Nitrogen oxides less than 150mg/m3。
The coke oven flue gas is characterized in that: the flue gas temperature is 220-400 ℃, and the SO2 concentration is 200-800mg/m3The nitrogen oxide is 400mg/m3The concentration of the particles in the dust collector is less than 30mg/m3The oxygen content of the smoke is 14-16%. The conventional coke oven flue gas treatment mostly adopts wet desulphurization for treatment, then denitration treatment is carried out at the low temperature of 160-290 ℃, the treated flue gas is subjected to whitening treatment, the temperature of the flue gas at the outlet of a desulphurization tower is about 50 ℃ during the wet desulphurization, the flue gas is in a saturated humidity state, the saturated humidity flue gas is rapidly cooled by the air with lower temperature after being discharged from a chimney, the water vapor in the flue gas is condensed into liquid, the light transmission is reduced, the phenomenon of white smoke plume visible to naked eyes is generated, meanwhile, the flue gas with higher humidity seriously corrodes the chimney and equipment, the low-temperature flue gas needs to be heated again before entering a denitration system, a large amount of heat is consumed after heating, the fuel is greatly consumed, a large amount of sewage is generated after the wet desulphurization, the salt content is higher, the flue gas is easy to crystallize and block pipelines, and the generated sewage needs toWater zones, leading to increased construction costs.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an integration treatment facility for coke oven flue gas is administered to solve the production waste water that exists among the coke oven flue gas treatment process, the energy consumption is high, equipment corrodes, the emission has the plume scheduling problem.
The utility model provides a technical scheme is: an integrated treatment device for treating coke oven flue gas comprises a flue gas inlet device, a flue gas dust removal device, a flue gas desulfurization device, a flue gas denitration device, a flue gas waste heat recovery device and a flue gas exhaust device, wherein the flue gas dust removal device and the flue gas denitration device are arranged on two sides of the flue gas desulfurization device; the flue gas inlet device comprises a flue gas inlet control valve and a flue gas flowmeter, the flue gas flowmeter is arranged on the right side of the flue gas control valve, and the flue gas inlet control valve is connected with the flue gas flowmeter through a flue gas pipeline; the flue gas desulfurization device comprises a desulfurization tower, a reaction zone, a desulfurizer feeding hole, a desulfurizer discharging hole, a flue gas inlet and a flue gas outlet, wherein the reaction zone is arranged in the desulfurization tower, the reaction zone is filled with the desulfurizer, the top of the desulfurization tower is provided with the desulfurizer feeding hole, the bottom of the desulfurization tower is provided with the desulfurizer discharging hole, and the two sides of the desulfurization tower are provided with the flue gas inlet and the flue gas outlet; the flue gas exhaust device comprises a main fan, a flue gas exhaust control valve and a chimney, wherein the flue gas exhaust control valve is arranged on the right side of the main fan, and the chimney is arranged on the right side of the flue gas exhaust control valve.
Preferably, the desulfurizing tower adopts two or more single tower devulcanizers to establish ties and forms, and the desulfurizing tower internal surface scribbles the anticorrosive coating, and the desulfurizing tower outside face is provided with the heat preservation.
Preferably, the reaction zone further comprises a primary reaction zone and a secondary reaction zone, and the primary reaction zone is arranged below the secondary reaction zone.
Preferably, the flue gas inlet is located below the flue gas outlet.
Preferably, the desulfurizer is a granular cylindrical desulfurizer which mainly comprises calcium-based or sodium-based combined fly ash and an auxiliary agent.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the dry desulfurization technology is adopted for desulfurization of flue gas, the problem of waste water is avoided, and the used desulfurizer can be used for primary building materials or secondary preparation of the desulfurizer, so that secondary pollution is avoided.
2. The mode of firstly desulfurizing and then denitrating is adopted to avoid SO in the flue gas2And SO3And NH3Ammonium sulfate and other blocking catalysts are generated in the reaction, so that the denitration efficiency is improved, and the service life of the catalyst is prolonged.
3. The smoke waste heat recovery device structure is adopted to recycle the waste heat of the smoke, so that the economic benefit is higher, meanwhile, the smoke still keeps higher after passing through the smoke waste heat recovery device, the chimney is always in a hot standby state, the smoke lifting height is higher, and the smoke plume problem is avoided.
4. The dry desulfurization adopts a granular desulfurizer, the high-temperature flue gas contains less moisture, the corrosion to equipment is reduced, and meanwhile, an anticorrosive coating is added in the equipment, so that the service life of the equipment is prolonged.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the flue gas inlet device of the present invention.
FIG. 3 is a schematic view of the flue gas desulfurization device of the present invention.
Fig. 4 is a schematic view of the flue gas discharging device of the present invention.
Fig. 5 is a sectional view of the desulfurizing tower of the present invention.
In the figure: the device comprises a flue gas inlet device 1, a flue gas dust removal device 2, a flue gas desulfurization device 3, a flue gas denitration device 4, a flue gas waste heat recovery device 5, a flue gas exhaust device 6, a flue gas inlet control valve 11, a flue gas flowmeter 12, a desulfurization tower 31, a reaction zone 32, a desulfurizer 33, a desulfurizer inlet 34, a desulfurizer outlet 35, a flue gas inlet 36, a flue gas outlet 37, a main fan 61, a flue gas exhaust control valve 62, a chimney 63, an anticorrosive layer 311, a heat preservation layer 312, a primary reaction zone 321 and a secondary reaction zone 322.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in figures 1-5, an integrated treatment device for coke oven flue gas treatment comprises a flue gas inlet device 1, a flue gas dust removal device 2, a flue gas desulfurization device 3, a flue gas denitration device 4, a flue gas waste heat recovery device 5 and a flue gas exhaust device 6, wherein the flue gas dust removal device 2 can adopt a cyclone separation dust remover, the flue gas denitration device 4 can adopt a selective catalytic reduction denitration device, the flue gas waste heat recovery device 5 can adopt a heat pipe type natural circulation waste heat boiler, the flue gas dust removal device 1 and the flue gas denitration device 4 are arranged on two sides of the flue gas desulfurization device 3, the flue gas inlet device 1 is arranged on one side of the flue gas dust removal device 1, the flue gas waste heat recovery device 5 is arranged on one side of the flue gas denitration device 4, the flue gas waste heat recovery device 5 recovers and utilizes the waste heat of the flue gas, and has high economic benefit, the chimney is still kept high, the chimney is always in a hot standby state, the lifting height of the smoke is high, the smoke plume problem is avoided, and a smoke exhaust device 6 is arranged on one side of the smoke waste heat recovery device 5; the flue gas inlet device 1 comprises a flue gas inlet control valve 11 and a flue gas flowmeter 12, the flue gas flowmeter 12 can adopt an MKRSL plug-in type flue gas flowmeter, the flue gas flowmeter 12 is arranged on the right side of the flue gas control valve 11, and the flue gas inlet control valve 11 is connected with the flue gas flowmeter 12 through a flue gas pipeline; the flue gas desulfurization device 3 comprises a desulfurization tower 31, a reaction zone 32, a desulfurizer 33, a desulfurizer inlet 34, a desulfurizer outlet 35, a flue gas inlet 36 and a flue gas outlet 37, wherein the reaction zone 32 is arranged inside the desulfurization tower 31, the desulfurizer 33 is filled in the reaction zone 32, the desulfurizer inlet 33 is arranged at the top of the desulfurization tower 31, the desulfurizer outlet 34 is arranged at the bottom of the desulfurization tower 31, and the flue gas inlet 35 and the flue gas outlet 36 are arranged at two sides of the desulfurization tower 31; the flue gas exhaust device 6 comprises a main fan 61, a flue gas exhaust control valve 62 and a chimney 63, wherein the flue gas exhaust control valve 62 is arranged on the right side of the main fan 61, and the chimney 63 is arranged on the right side of the flue gas exhaust control valve 62.
Further, the desulfurizing tower 31 is formed by connecting two or more single-tower desulfurizers in series, the flue gas treatment capacity can be increased, the inner surface of the desulfurizing tower 31 is coated with the anticorrosive layer 311, the anticorrosive layer 311 reduces the corrosion of the flue gas to the tower body, the service life of equipment is prolonged, the outer side surface of the desulfurizing tower 31 is provided with the heat insulation layer 312, and the heat insulation layer 312 can reduce the heat loss of the flue gas in the reaction process and improve the reaction efficiency.
Further, the reaction zone 32 further comprises a first-stage reaction zone 321 and a second-stage reaction zone 322, wherein the first-stage reaction zone 321 is arranged below the second-stage reaction zone 322, the reaction time of the reactant and the flue gas can be prolonged by the aid of the increased reaction zone, and desulfurization efficiency is improved.
Further, the flue gas inlet 35 is located below the flue gas outlet 36, and the flue gas enters from the lower part of the desulfurizing tower 31 and exits from the upper part, so that the flow velocity of a reaction interface can be controlled, and the reaction efficiency can be improved.
Further, the desulfurizer 33 is a granular cylindrical desulfurizer which mainly comprises calcium-based or sodium-based combined fly ash and an auxiliary agent, flue gas enters a micropore structure in the desulfurizer, and active components in the desulfurizer, namely calcium-based or sodium-based, are utilized to treat SO in the flue gas2And SO3And carrying out desulfurization reaction.
The working principle is as follows: an operator firstly sends a desulfurizer 33 to the position of the reaction zone 32 through a desulfurizer inlet 34 of the desulfurizing tower 31, opens the flue gas inlet control valve 11, removes dust from flue gas through the flue gas dust removal device 2, and the dust content of the flue gas after dust removal is not higher than 30mg/m3The flue gas temperature is 300-The flue gas needs to be heated again, the flue gas can directly enter the flue gas denitration device 4 from the flue gas outlet 36 for denitration reaction, the denitrated flue gas is subjected to waste heat recovery by the flue gas waste heat recovery device 5, the temperature of the flue gas is reduced to 100-.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides an integration treatment facility for coke oven flue gas is administered, includes flue gas access device (1), flue gas dust collector (2), flue gas desulphurization unit (3), flue gas denitrification facility (4), flue gas waste heat recovery device (5), flue gas eduction gear (6), its characterized in that: a flue gas dust removal device (2) and a flue gas denitration device (4) are arranged on two sides of the flue gas desulfurization device (3), a flue gas inlet device (1) is arranged on one side of the flue gas dust removal device (2), a flue gas waste heat recovery device (5) is arranged on one side of the flue gas denitration device (4), and a flue gas discharge device (6) is arranged on one side of the flue gas waste heat recovery device (5);
the flue gas inlet device (1) comprises a flue gas inlet control valve (11) and a flue gas flowmeter (12), wherein the flue gas flowmeter (12) is arranged on the right side of the flue gas inlet control valve (11), and the flue gas inlet control valve (11) is connected with the flue gas flowmeter (12) through a flue gas pipeline;
the flue gas desulfurization device (3) comprises a desulfurization tower (31), a reaction zone (32), a desulfurizer (33), a desulfurizer feeding hole (34), a desulfurizer discharging hole (35), a flue gas inlet (36) and a flue gas outlet (37), wherein the reaction zone (32) is arranged in the desulfurization tower (31), the desulfurizer (33) is filled in the reaction zone (32), the desulfurizer feeding hole (34) is arranged at the top of the desulfurization tower (31), the desulfurizer discharging hole (35) is arranged at the bottom of the desulfurization tower (31), and the flue gas inlet (36) and the flue gas outlet (37) are arranged on two sides of the desulfurization tower (31);
the flue gas exhaust device (6) comprises a main fan (61), a flue gas exhaust control valve (62) and a chimney (63), wherein the flue gas exhaust control valve (62) is arranged on the right side of the main fan (61), and the chimney (63) is arranged on the right side of the flue gas exhaust control valve (62).
2. The integrated treatment equipment for coke oven flue gas treatment of claim 1, wherein: the desulfurization tower (31) is formed by connecting two or more single-tower desulfurizers in series, an anticorrosive layer (311) is coated on the inner surface of the desulfurization tower (31), and a heat-insulating layer (312) is arranged on the outer side surface of the desulfurization tower (31).
3. The integrated treatment equipment for coke oven flue gas treatment of claim 1, wherein: the reaction zone (32) further comprises a primary reaction zone (321) and a secondary reaction zone (322), the primary reaction zone (321) being disposed below the secondary reaction zone (322).
4. The integrated treatment equipment for coke oven flue gas treatment of claim 1, wherein: the flue gas inlet (36) is positioned below the flue gas outlet (37).
5. The integrated treatment equipment for coke oven flue gas treatment of claim 1, wherein: the desulfurizer (33) is a granular cylindrical desulfurizer and mainly comprises calcium-based or sodium-based combined fly ash and an auxiliary agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921513995.6U CN211837254U (en) | 2019-09-12 | 2019-09-12 | Integrated treatment equipment for treating coke oven flue gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921513995.6U CN211837254U (en) | 2019-09-12 | 2019-09-12 | Integrated treatment equipment for treating coke oven flue gas |
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| Publication Number | Publication Date |
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| CN211837254U true CN211837254U (en) | 2020-11-03 |
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| CN201921513995.6U Active CN211837254U (en) | 2019-09-12 | 2019-09-12 | Integrated treatment equipment for treating coke oven flue gas |
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