CN209287041U - A kind of system for realizing flue gases of cock oven desulphurization denitration using tedge waste heat - Google Patents
A kind of system for realizing flue gases of cock oven desulphurization denitration using tedge waste heat Download PDFInfo
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- CN209287041U CN209287041U CN201821783455.5U CN201821783455U CN209287041U CN 209287041 U CN209287041 U CN 209287041U CN 201821783455 U CN201821783455 U CN 201821783455U CN 209287041 U CN209287041 U CN 209287041U
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Abstract
The utility model relates to a kind of systems for realizing flue gases of cock oven desulphurization denitration using tedge waste heat, the smoke inlet of middle low-temperature flue gas desulfuring and denitrifying apparatus is connect with coke oven main chimney flue, the smoke inlet of the exhanst gas outlet connection waste-heat recovery device of middle low-temperature flue gas desulfuring and denitrifying apparatus, the waste gas inlet in raw coke oven gas-flue gas heat-exchanger rig is connected simultaneously, in waste gas inlet connection in raw coke oven gas-flue gas heat-exchanger rig in low-temperature flue gas desulfuring and denitrifying apparatus Benitration reactor Thermal desorption gas access, Thermal desorption gas vent is connected with the flue gas outlet in middle low-temperature flue gas desulfuring and denitrifying apparatus；Raw coke oven gas-flue gas heat-exchanger rig is arranged on coke oven coke oven uprising tube；The exhanst gas outlet connection coke oven chimney that waste heat recycling heat is set.The problem of high operating cost needed for the utility model can effectively solve the problem that the regeneration of flue gases of cock oven denitration unit resolves, while also achieving making full use of for coke oven production process waste heat.
Description
Technical field
The utility model relates to gas cleaning and heat recovery technology field more particularly to a kind of utilization tedge waste heat are real
The system of existing flue gases of cock oven desulphurization denitration.
Background technique
In to coke oven production process, the heating system combustion gas of coke oven obtains enough heats in coke furnace carbonization chamber
The destructive distillation of coal charge, fuel gas buring generate a certain amount of NOx because of high temperature in the process, and the sulfur in combustion gas is oxidized to SO2, NOx
And SO2Flue gases of cock oven can be carried out if not adopting an effective measure as the exhaust gas that burning generates is by the flue discharge of coke oven
Purified treatment will cause serious pollution to atmospheric environment.Purification to flue gases of cock oven, is commonly referred to as in flue gas
NOx and SO2Removing, i.e., to flue gases of cock oven carry out desulphurization denitration processing.
Currently, efficiency is higher in flue gases of cock oven desulfurizing and denitrifying process, running and comparing is reliable and stable surely belongs to SCR method desulfurization
Denitrating system.The system passes through first to be sprayed into desulfurizing agent and carries out desulfurization to flue gas in dry method or half-dried normal direction flue gas, to de-
Ammonia is sprayed into flue gas after sulphur, and the removing of SCR method is carried out to the NOx in flue gas.When removing NOx using SCR method, to rely on dedicated
Catalyst carries out catalytic reduction reaction.Although having carried out desulfurization process to flue gas before carrying out NOx removal, but still there is small part
SO2Denitrating system is entered with flue gas, at this time SO remaining in flue gas2It can react with the ammonia of penetrating, generating has certain glue
The ammonia sulphur compound of property, these ammonia sulphur compounds are attached on denitrating catalyst, will reduce the catalytic action of catalyst, cause to lead to
Often described catalyst " poisoning ".For this purpose, for denitration unit, needs periodically to be passed through high-temperature gas catalyst is parsed again
Raw, removing is attached to the ammonia sulphur compound of catalyst surface, restores the activity of catalyst again.In this process, it usually needs
The consumption of the energy is increased by external heat source to needing to parse additional input amount of heat in regenerated unit.
Summary of the invention
The utility model provides a kind of system for realizing flue gases of cock oven desulphurization denitration using tedge waste heat, Neng Gouyou
High operating cost needed for effect solves the problems, such as the regeneration of flue gases of cock oven denitration unit resolves, while also achieving coke oven production mistake
Cheng Yure's makes full use of.
In order to achieve the above object, the utility model is implemented with the following technical solutions:
A kind of system for realizing flue gases of cock oven desulphurization denitration using tedge waste heat, including middle low-temperature flue gas desulphurization denitration
Device, waste-heat recovery device and raw coke oven gas-flue gas heat-exchanger rig；Denitration in the middle low-temperature flue gas desulfuring and denitrifying apparatus is anti-
Device is answered to be equipped with denitrating catalyst thermal analysis apparatus, the smoke inlet of middle low-temperature flue gas desulfuring and denitrifying apparatus passes through pipeline one and coke oven
Main chimney flue connects, and sets exhaust gas fan one on pipeline one；The exhanst gas outlet of middle low-temperature flue gas desulfuring and denitrifying apparatus is connected by pipeline two
The smoke inlet of waste-heat recovery device is connect, while the flue gas in raw coke oven gas-flue gas heat-exchanger rig is connected by pipeline three and is entered
Mouthful, exhaust gas fan two is set on pipeline three, the waste gas inlet in raw coke oven gas-flue gas heat-exchanger rig passes through low in the connection of pipeline four
The Thermal desorption gas access of Benitration reactor in warm flue gas desulfurization and denitrification device, Thermal desorption gas vent and middle low-temperature flue gas desulfurization
Flue gas outlet in denitrification apparatus is connected；Raw coke oven gas-flue gas heat-exchanger rig is arranged on coke oven coke oven uprising tube；Waste heat recycling heat
The exhanst gas outlet connection coke oven chimney set.
The raw coke oven gas-flue gas heat-exchanger rig is integrated with coke oven coke oven uprising tube.
The pipeline three is drawn from pipeline two, sets exhaust gas quantity regulating device one on the pipeline two in the two junction downstream,
Exhaust gas quantity regulating device two is set on the pipeline three in the two junction downstream.
The exhaust gas fan one, exhaust gas fan two are driven by variable-frequency motor.
Compared with prior art, the utility model has the beneficial effects that
1) by the high temperature raw coke oven gas in the purified flue pneumatic transmission of desulphurization denitration to oven top of coke oven and coke oven coke oven uprising tube into
Row heat exchange, makes the temperature of flue gas reach the temperature requirement for parsing regenerated Thermal desorption gas to denitrating catalyst, is not needing
In the case where additional infeed energy, the solution of denitrating catalyst in denitration reaction section in middle low-temperature flue gas desulfuring and denitrifying apparatus is realized
Analysis regeneration, significantly reduces production run cost；
2) flue gas exchanges heat with high temperature raw coke oven gas in coke oven coke oven uprising tube, and waste heat is same in effective use raw coke oven gas
When, because flue gas itself temperature with higher is (frequently with water as heat-exchange working medium, gas in conventional tedge residual heat using device
It is low to change temperature, only 100 DEG C or so), ensure that coke oven coke oven uprising tube inner wall is able to maintain that relatively high surface temperature in heat exchange
Degree greatly reduces the probability that tar-like substance is condensed and deposited in coke oven coke oven uprising tube inner wall in raw coke oven gas, has ensured coke-oven coal
The normal operation of gas guiding system；
3) after exchanging heat, the temperature of raw coke oven gas is reduced in coke oven coke oven uprising tube, and the work for reducing subsequent gas cooling system is negative
Lotus reduces the dosage and waste water production quantity of ammonia water by cooling, improves the efficiency and Environmental Protection Level of entire coking process.
Detailed description of the invention
Fig. 1 is a kind of knot of system that flue gases of cock oven desulphurization denitration is realized using tedge waste heat described in the utility model
Structure schematic diagram.
In figure: 3. denitration reaction section of low-temperature flue gas desulfuring and denitrifying apparatus, 4. waste-heat recovery device 5. is burnt in 1. coke ovens 2.
6. raw coke oven gas of furnace tedge -7. exhaust gas fan of flue gas heat-exchanger rig, one 8. exhaust gas fan, 2 9. exhaust gas quantity regulating device one
10. 2 11. coke oven chimney of exhaust gas quantity regulating device
Specific embodiment
Specific embodiment of the present utility model is described further with reference to the accompanying drawing:
A kind of realize that flue gases of cock oven desulphurization denitration is using tedge waste heat as shown in Figure 1, described in the utility model
System, including middle low-temperature flue gas desulfuring and denitrifying apparatus 2, waste-heat recovery device 4 and raw coke oven gas-flue gas heat-exchanger rig 6；It is low in described
Benitration reactor in warm flue gas desulfurization and denitrification device 2 is equipped with denitrating catalyst thermal analysis apparatus, middle low-temperature flue gas desulphurization denitration
The smoke inlet of device 2 is connect by pipeline one with coke oven main chimney flue, and exhaust gas fan 1 is set on pipeline one；Middle low-temperature flue gas is de-
The exhanst gas outlet of sulphur denitrification apparatus 2 connects the smoke inlet of waste-heat recovery device 4 by pipeline two, while being connected by pipeline three
Waste gas inlet in raw coke oven gas-flue gas heat-exchanger rig 6 sets exhaust gas fan 28, raw coke oven gas-flue gas heat exchange on pipeline three
The Thermal desorption that waste gas inlet in device 6 passes through Benitration reactor in low-temperature flue gas desulfuring and denitrifying apparatus 2 in the connection of pipeline four
Gas access, Thermal desorption gas vent are connected with the flue gas outlet in middle low-temperature flue gas desulfuring and denitrifying apparatus 2；Raw coke oven gas-cigarette
Road gas heat-exchanger rig 6 is arranged on coke oven coke oven uprising tube 5；Waste heat recycling heat sets 4 exhanst gas outlet connection coke oven chimney 11.
The raw coke oven gas-flue gas heat-exchanger rig 6 is integrated with coke oven coke oven uprising tube 5.
The pipeline three is drawn from pipeline two, sets exhaust gas quantity regulating device 1 on the pipeline two in the two junction downstream,
Exhaust gas quantity regulating device 2 10 is set on the pipeline three in the two junction downstream.
The exhaust gas fan 1, exhaust gas fan 28 are driven by variable-frequency motor.
It is described in the utility model it is a kind of using tedge waste heat realize flue gases of cock oven desulphurization denitration system it is worked
Journey is as follows:
Under the action of exhaust gas fan 1, the flue gas of coke oven 1 is extracted out from coke oven main chimney flue, the low temperature cigarette in
In desulfurization denitrification apparatus 2, flue gas first carries out desulfurization, then carries out denitration, finally therefrom low-temperature flue gas desulfuring and denitrifying apparatus 2
Exhanst gas outlet discharge；
As needed, the flue gas by exhaust gas quantity regulating device 2 10 by part by desulphurization denitration purification introduces coke oven
In the raw coke oven gas being arranged on tedge 5-flue gas heat-exchanger rig 6,650 DEG C or more of flowing in flue gas and coke oven coke oven uprising tube 5
High temperature raw coke oven gas indirect heat exchange, absorb the heat of raw coke oven gas and the flue gas after heating up by pipeline four enter in low-temperature flue gas
In the Benitration reactor of desulfuring and denitrifying apparatus 2, the denitrating catalyst in Benitration reactor is carried out using the high temperature heat of carrying
Parsing regeneration；
After the flue gas of desulphurization denitration processing and the regenerated flue gas of completion denitrating catalyst parsing are converged, carry
A large amount of sensible heat is entered in waste-heat recovery device 4 by pipeline two, and heat therein is converted into the energy that can directly utilize,
Realize the recycling and utilization of flue gas waste heat；
High altitude discharge is carried out finally by coke oven chimney 11 by waste heat flue gas after the recovery.
In the utility model, the raw coke oven gas-flue gas heat-exchanger rig 6 utilizes flue by the way of indirect heat exchange
The heat that raw coke oven gas carries in aspiration coke oven coke oven uprising tube 5 realizes raw coke oven gas heat in recycling coke oven coke oven uprising tube 5, improves flue
The purpose of temperature degree；Waste-heat recovery device 4 is converted the waste heat in flue gas by the way of indirect heat exchange, using heat transferring medium
At the effective energy that can directly utilize, such as steam, can be used for generating electricity, as driving power source or directly use.
The middle low-temperature flue gas desulfuring and denitrifying apparatus 2 is that by the device of continuous flue gas desulfurization and denitrification, and therein
Denitrating catalyst thermal analysis apparatus is equipped in Benitration reactor；Such as application No. is 201410478420.0 Chinese utility model is special
" middle low-temperature flue gas desulfurization and dedusting denitration and denitrating catalyst Thermal desorption integrated apparatus " disclosed in benefit.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (4)
1. a kind of system for realizing flue gases of cock oven desulphurization denitration using tedge waste heat, which is characterized in that including middle low temperature cigarette
Desulfurization denitrification apparatus, waste-heat recovery device and raw coke oven gas-flue gas heat-exchanger rig；The middle low-temperature flue gas desulfuring and denitrifying apparatus
In Benitration reactor be equipped with denitrating catalyst thermal analysis apparatus, the smoke inlet of middle low-temperature flue gas desulfuring and denitrifying apparatus passes through pipe
Road one is connect with coke oven main chimney flue, and exhaust gas fan one is set on pipeline one；The exhanst gas outlet of middle low-temperature flue gas desulfuring and denitrifying apparatus is logical
Piping two connects the smoke inlet of waste-heat recovery device, while being connected in raw coke oven gas-flue gas heat-exchanger rig by pipeline three
Waste gas inlet, set exhaust gas fan two on pipeline three, the waste gas inlet in raw coke oven gas-flue gas heat-exchanger rig passes through pipeline
In four connections in low-temperature flue gas desulfuring and denitrifying apparatus Benitration reactor Thermal desorption gas access, Thermal desorption gas vent is low in
Flue gas outlet in warm flue gas desulfurization and denitrification device is connected；Raw coke oven gas-flue gas heat-exchanger rig is arranged on coke oven coke oven uprising tube；
The exhanst gas outlet connection coke oven chimney that waste heat recycling heat is set.
2. a kind of system for realizing flue gases of cock oven desulphurization denitration using tedge waste heat according to claim 1, special
Sign is that the raw coke oven gas-flue gas heat-exchanger rig is integrated with coke oven coke oven uprising tube.
3. a kind of system for realizing flue gases of cock oven desulphurization denitration using tedge waste heat according to claim 1, special
Sign is that the pipeline three is drawn from pipeline two, sets exhaust gas quantity regulating device one on the pipeline two in the two junction downstream, two
Exhaust gas quantity regulating device two is set on the pipeline three in person junction downstream.
4. a kind of system for realizing flue gases of cock oven desulphurization denitration using tedge waste heat according to claim 1, special
Sign is that the exhaust gas fan one, exhaust gas fan two are driven by variable-frequency motor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821783455.5U CN209287041U (en) | 2018-10-31 | 2018-10-31 | A kind of system for realizing flue gases of cock oven desulphurization denitration using tedge waste heat |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821783455.5U CN209287041U (en) | 2018-10-31 | 2018-10-31 | A kind of system for realizing flue gases of cock oven desulphurization denitration using tedge waste heat |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109126452A (en) * | 2018-10-31 | 2019-01-04 | 中冶焦耐(大连)工程技术有限公司 | A kind of system and method for realizing flue gases of cock oven desulphurization denitration using tedge waste heat |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109126452A (en) * | 2018-10-31 | 2019-01-04 | 中冶焦耐(大连)工程技术有限公司 | A kind of system and method for realizing flue gases of cock oven desulphurization denitration using tedge waste heat |
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