CN208727151U - A kind of new Type Coke Oven flue gas desulfurization and denitrification system - Google Patents
A kind of new Type Coke Oven flue gas desulfurization and denitrification system Download PDFInfo
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- CN208727151U CN208727151U CN201821323949.5U CN201821323949U CN208727151U CN 208727151 U CN208727151 U CN 208727151U CN 201821323949 U CN201821323949 U CN 201821323949U CN 208727151 U CN208727151 U CN 208727151U
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Abstract
The utility model discloses a kind of new Type Coke Oven flue gas desulfurization and denitrification systems, the new Type Coke Oven flue gas desulfurization and denitrification system includes waste-heat recovery device, circulating fluid bed desulfurization device, dust-extraction unit and low temperature SCR denitration device, coke oven flue gas is passed through after waste-heat recovery device recovery waste heat, first with the desulfurization of circulating fluidized bed dry sulfur removal technology and dedusting, low temperature SCR denitration technique is recycled to carry out denitration to coke oven flue gas after desulfurization, in conjunction with the smoke temperature feature of coke oven flue gas, eliminate the heating system of existing denitrating system, denitrating catalyst is placed in after dedusting, avoid abrasion of the dust to denitrating catalyst, increase the service life of denitrating catalyst, reduce the operating cost of desulphurization denitration, exiting flue gas concentration can reach: SO2≤30mg/Nm3, dust≤15mg/Nm3, NOx≤150mg/Nm3, removal effect is preferable.
Description
Technical field
The utility model relates to coke oven flue gas desulphurization denitration technical fields, and in particular to a kind of new Type Coke Oven flue gas desulfurization is de-
Nitre system.
Background technique
Combustion of fossil fuel generates a large amount of flue gas emissions into atmosphere, wherein except containing sulfur dioxide, sulfur trioxide,
Outside hydrogen chloride, hydrogen fluoride, nitrogen oxides and a small amount of harmful organic substance, also contain a large amount of dusts, the small parent in these dusts
Aqueous and non-hydrophilic particle (predominantly calcium salt particle, aluminium salt particle, magnesium salts particle, titanium salt particle, molysite particle, lead salt grain
Son, zinc salt particle, cobalt salt particle, rare earth element particle, radioactive element particle and other harmful element particles and titanium dioxide
The mineral particles such as silicon particle, mullite particle, silicate particles, phosphate particle)；These particles and flue gas are discharged together
Into atmosphere, at the same these particle surfaces be easily absorbing sulfur dioxide, sulfur trioxide, hydrogen chloride, hydrogen fluoride, nitrogen oxides,
Harmful organic substance and bacterium etc. cause atmosphere suspended particles (here it is usually said PM100, PM10, PM2.5 etc.) content
It dramatically increases, and causes haze and atmospheric photochemical reaction phenomenon, cause serious environmental pollution, therefore exploiting economy is efficient
Desulphurization denitration technology has highly important strategic importance.
Existing desulphurization denitration technology is usually first denitration desulfurization again, complicated, the independent heat supply of needs that there are process flows
System, power consumption is big, construction investment and operating cost are higher, removal efficiency is low, discharges the problems such as not up to standard.
The utility model proposes a kind of new Type Coke Oven flue gas desulfurization and denitrification system, in conjunction with the smoke temperature feature of coke oven flue gas,
The heating system for eliminating existing denitrating system after denitrating catalyst is placed in dedusting, avoids dust to denitrating catalyst
Abrasion, increase the service life of denitrating catalyst, reduce the operating cost of desulphurization denitration, while removal effect is preferable.
Utility model content
The purpose of this utility model is to provide a kind of new Type Coke Oven flue gas desulfurization and denitrification systems, existing de- to solve
The process flow of sulphur denitration technology is complicated, the independent heating system of needs, power consumption is big, construction investment and operating cost are higher,
The problems such as removal efficiency is low, discharge is not up to standard.
To achieve the above object, the technical solution of the utility model are as follows: the new Type Coke Oven flue gas desulfurization and denitrification system packet
Include waste-heat recovery device, circulating fluid bed desulfurization device, dust-extraction unit and low temperature SCR denitration device, the waste heat recycling dress
It sets including pipe heat exchanger, the air inlet of the pipe heat exchanger connects coke oven flue gas generation device, and the recirculating fluidized bed is de-
Sulphur device includes desulfurizing tower and material returning device, and the gas outlet of the heat exchanger is connected to the air inlet of desulfurizing tower by pipeline, described de-
The air inlet of the gas outlet connection dust-extraction unit of sulphur tower, described material returning device one end connect desulfurizing tower, and the material returning device other end connects
The slag-drip opening of dust-extraction unit is connect, the low temperature SCR denitration device includes SCR denitration reaction device, the gas outlet of the dust-extraction unit
The air inlet of SCR denitration reaction device is connected to by pipeline.
Preferably, the circulating fluid bed desulfurization device further includes desulfurizing agent tank and technique water tank, in the desulfurizing agent tank
It is loaded with desulfurizing agent, the desulfurizing agent tank is connect by pipeline with desulfurizing tower, and the technique water tank is connected by pipeline and desulfurizing tower
It connects.
Preferably, the low temperature SCR denitration device further includes spray ammonia system, and the spray ammonia system includes tank used for storing ammonia, ammonia
Evaporator, ammonia/air mixer, dilution air and ammonia-spraying grid, the import of the tank used for storing ammonia connection ammonia evaporator, the ammonia
The outlet of evaporator connects ammonia/air mixer air inlet, and the air inlet of the ammonia/air mixer is also connected with dilution wind
Machine, the ammonia-spraying grid are arranged in the admission line of SCR denitration reaction device, and several spray heads are equipped on the ammonia-spraying grid,
The by-pass port of the gas outlet connection spray head of the ammonia/air mixer, the outlet of the spray head towards SCR denitration reaction device into
Port.
Preferably, the gas outlet of the SCR denitration reaction device is connected to the air inlet of chimney by pipeline.
Preferably, air-introduced machine is provided on the pipeline between the SCR denitration reaction device and chimney.
Preferably, three layers of SCR denitration are disposed in the SCR denitration reaction device.
Preferably, the desulfurizing agent is calcium hydroxide desulfurizing agent.
Preferably, the dust-extraction unit is sack cleaner.
Preferably, the cooling medium in the pipe heat exchanger is condensed water.
Preferably, the SCR denitration is low temperature series SCR denitration.
The utility model has the advantages that
The utility model proposes a kind of new Type Coke Oven flue gas desulfurization and denitrification system, by coke oven flue gas pass through waste heat recycling dress
After setting recovery waste heat, first with the desulfurization of circulating fluidized bed dry sulfur removal technology and dedusting, low temperature SCR denitration work is recycled after desulfurization
Skill carries out denitration to coke oven flue gas and eliminates the heating system of existing denitrating system in conjunction with the smoke temperature feature of coke oven flue gas, will take off
Denox catalyst is placed in after dedusting, is avoided abrasion of the dust to denitrating catalyst, is increased the service life of denitrating catalyst,
The operating cost of desulphurization denitration is reduced, exiting flue gas concentration can reach: SO2≤30mg/Nm3, dust≤15mg/Nm3, NOx≤
150mg/Nm3, removal effect is preferable.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of new Type Coke Oven flue gas desulfurization and denitrification system of the utility model.
Specific embodiment
The following examples illustrate the utility model, but is not intended to limit the scope of the present invention.
Embodiment 1
As shown in Figure 1, a kind of new Type Coke Oven flue gas desulfurization and denitrification system proposed in the present embodiment includes waste heat recycling dress
Set 1, circulating fluid bed desulfurization device 2, dust-extraction unit 3 and low temperature SCR denitration device 4.
Waste-heat recovery device 1 includes pipe heat exchanger 11, and the cooling medium in pipe heat exchanger 11 is condensed water, and tubular type is changed
The air inlet of hot device 11 connects coke oven flue gas generation device 5, circulating fluid bed desulfurization device 2 in the present embodiment using
Ciculation fluidized bed process flue gas desulfurization technique, circulating fluid bed desulfurization device 2 include desulfurizing tower 21 and material returning device 24, pipe heat exchanger
11 gas outlet is connected to the air inlet of desulfurizing tower 21 by pipeline, and the gas outlet of desulfurizing tower 21 is connected to the air inlet of dust-extraction unit 3,
24 one end of material returning device connects desulfurizing tower 21, and 24 other end of material returning device connects the slag-drip opening of dust-extraction unit 3, in the present embodiment de-
Nitre device carries out denitration using selective catalytic reduction (SCR) technology, and low temperature SCR denitration device 4 includes SCR denitration reaction device
41, the gas outlet of dust-extraction unit 3 is connected to the air inlet of SCR denitration reaction device 41, the outlet of SCR denitration reaction device 41 by pipeline
Mouth is connected to the air inlet of chimney 7 by pipeline, is provided with air-introduced machine 6 on the pipeline between SCR denitration reaction device 41 and chimney 7,
Dust-extraction unit 3 in this implementation is sack cleaner.
Circulating fluid bed desulfurization device 2 further includes desulfurizing agent tank 22 and technique water tank 23, is loaded in desulfurizing agent tank 22 de-
Sulphur agent, desulfurizing agent tank 22 is connect by pipeline with desulfurizing tower 21, for inputting fresh desulfurizing agent, this implementation into desulfurizing tower 21
Used in desulfurizing agent be Ca (OH)2, technique water tank 23 is connect by pipeline with desulfurizing tower 21, for supplying into desulfurizing tower 21
Be humidified water.
Low temperature SCR denitration device 4 further include spray ammonia system, spray ammonia system include tank used for storing ammonia 42, ammonia evaporator 43, ammonia/
Air mixer 44, dilution air 45 and ammonia-spraying grid, tank used for storing ammonia 42 connect the import of ammonia evaporator 43, ammonia evaporator 43
The air inlet of outlet connection ammonia/air mixer 44, the air inlet of ammonia/air mixer 44 are also connected with dilution air 45, spray
Ammonia grid is arranged in the admission line of SCR denitration reaction device 41, and several spray heads, ammonia/air mixing are equipped on ammonia-spraying grid
The by-pass port of the gas outlet connection spray head of device 44, the air inlet of the outlet of spray head towards SCR denitration reaction device 41.
Three layers of SCR denitration 411 are disposed in SCR denitration reaction device 41, SCR denitration 411 is low
Warm series SCR denitration, Applicable temperature are 140-320 DEG C.
The concrete technology flow process of a kind of new Type Coke Oven flue gas desulfurization and denitrification system of the present embodiment are as follows: coke oven flue gas generates dress
Coke oven flue gas is led in pipe heat exchanger coke oven flue gas temperature after recovery waste heat by about 280 DEG C of coke oven flue gas or so for setting generation
It is reduced to 195 DEG C；Coke oven flue gas after cooling is sent into desulfurizing tower 21 and carries out desulfurization, text of the coke oven flue gas through 21 lower end of desulfurizing tower
Venturi retention accelerate after, in desulfurizing tower 21 with desulfurizing agent tank 22 be added fresh desulfurizing agent Ca (OH)2And through material returning device
The solid particle of 24 circulations comes into full contact with, and severe friction, formation fluidized bed are spraying between particle, between gas and particle
Under conditions of entering uniform water mist reduction smoke temperature, the SO in desulfurizing agent and flue gas2Reaction generates CaSO3, then it is further oxidized to
CaSO4, the coke oven flue gas temperature after desulfurization is 190 DEG C, and the coke oven flue gas after desulfurization with a large amount of solid particles is by desulfurizing tower 21
Top is discharged into sack cleaner, and the particulate matter in coke oven flue gas is separated, and major part particle therein is again through returning charge
Device 24 is recycled back to desulfurizing tower 21, and desulfurization ash can be by being sent to user by tank car after the ash bucket discharging of bag filter
Or processing is abandoned, it is 185 DEG C by flue-gas temperature after bag filter purifying and dedusting, coke oven flue gas is re-fed into SCR later and is taken off
Denitration is carried out using catalyst in nitre reactor 41；It sprays ammonia system and ammonia steam is sprayed into SCR denitration by the spray head on ammonia-spraying grid
In the admission line of reactor 41, ammonia steam enters in SCR denitration reaction device 41 after mixing with coke oven flue gas, reducing agent (NH3)
Under the action of SCR denitration 411, NOx in flue gas is reduced to nitrogen and water, is gathered in SCR denitration reaction device 41
Ash content can be by being sent to user by tank car after the discharging of lower end or abandoning processing, and denitrification process reaction equation is as follows:
4NO+4NH3+O2→4N2+6H2O
4NO2+2NH3+O2→3N2+6H2O.
About 175 DEG C of coke oven flue gas after denitration can be emitted into atmosphere through air-introduced machine 6 by chimney 7.Present apparatus exiting flue gas
Concentration can reach: SO2≤30mg/Nm3, dust≤15mg/Nm3, NOx≤150mg/Nm3, removal effect is preferable.
Although above having made detailed description to the utility model with generality explanation and specific embodiment,
On the basis of the utility model, it can be made some modifications or improvements, this is apparent to those skilled in the art
's.Therefore, these modifications or improvements on the basis of without departing from the spirit of the present invention, belong to the utility model and want
Seek the range of protection.
Claims (10)
1. a kind of new Type Coke Oven flue gas desulfurization and denitrification system, which is characterized in that the new Type Coke Oven flue gas desulfurization and denitrification system packet
Include waste-heat recovery device (1), circulating fluid bed desulfurization device (2), dust-extraction unit (3) and low temperature SCR denitration device (4), institute
Stating waste-heat recovery device (1) includes pipe heat exchanger (11), and the air inlet connection coke oven flue gas of the pipe heat exchanger (11) produces
Generating apparatus (5), the circulating fluid bed desulfurization device (2) include desulfurizing tower (21) and material returning device (24), the pipe heat exchanger
(11) by the air inlet of pipeline connection desulfurizing tower (21), the gas outlet of the desulfurizing tower (21) is connected to dust-extraction unit for gas outlet
(3) air inlet, described material returning device (24) one end connect desulfurizing tower (21), and material returning device (24) other end connects dust-extraction unit
(3) slag-drip opening, the low temperature SCR denitration device (4) include SCR denitration reaction device (41), the outlet of the dust-extraction unit (3)
The air inlet that mouth passes through pipeline connection SCR denitration reaction device (41).
2. a kind of new Type Coke Oven flue gas desulfurization and denitrification system according to claim 1, which is characterized in that described ciculation fluidized
Bed desulfurizer (2) further includes desulfurizing agent tank (22) and technique water tank (23), is loaded with desulfurizing agent in the desulfurizing agent tank (22),
The desulfurizing agent tank (22) is connect by pipeline with desulfurizing tower (21), and the technique water tank (23) passes through pipeline and desulfurizing tower (21)
Connection.
3. a kind of new Type Coke Oven flue gas desulfurization and denitrification system according to claim 1, which is characterized in that the low-temperature SCR
Denitrification apparatus (4) further include spray ammonia system, the spray ammonia system include tank used for storing ammonia (42), ammonia evaporator (43), ammonia/air mix
Clutch (44), dilution air (45) and ammonia-spraying grid, the import of tank used for storing ammonia (42) connection ammonia evaporator (43), the ammonia
The air inlet of outlet connection ammonia/air mixer (44) of evaporator (43), the air inlet of the ammonia/air mixer (44) is also
It is connected with dilution air (45), the ammonia-spraying grid is arranged in the admission line of SCR denitration reaction device (41), the spray ammonia lattice
Several spray heads, the by-pass port of the gas outlet connection spray head of the ammonia/air mixer (44) are installed, the spray head goes out on grid
Air inlet of the mouth towards SCR denitration reaction device (41).
4. a kind of new Type Coke Oven flue gas desulfurization and denitrification system according to claim 1, which is characterized in that the SCR denitration
The air inlet that the gas outlet of reactor (41) passes through pipeline connection chimney (7).
5. a kind of new Type Coke Oven flue gas desulfurization and denitrification system according to claim 4, which is characterized in that the SCR denitration
Air-introduced machine (6) are provided on pipeline between reactor (41) and chimney (7).
6. a kind of new Type Coke Oven flue gas desulfurization and denitrification system according to claim 1, which is characterized in that the SCR denitration
Three layers of SCR denitration (411) are disposed in reactor (41).
7. a kind of new Type Coke Oven flue gas desulfurization and denitrification system according to claim 2, which is characterized in that the desulfurizing agent is
Calcium hydroxide desulfurizing agent.
8. a kind of new Type Coke Oven flue gas desulfurization and denitrification system according to claim 1, which is characterized in that the dust-extraction unit
It (3) is sack cleaner.
9. a kind of new Type Coke Oven flue gas desulfurization and denitrification system according to claim 1, which is characterized in that the pipe type heat transfer
Cooling medium in device (11) is condensed water.
10. a kind of new Type Coke Oven flue gas desulfurization and denitrification system according to claim 6, which is characterized in that the SCR denitration
Catalyst (411) is low temperature series SCR denitration.
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| CN109999656A (en) * | 2019-05-07 | 2019-07-12 | 福建龙净脱硫脱硝工程有限公司 | Realize the flue gas circulating fluidized bed desulfurization of full working scope desulphurization denitration and the composite processing system and flue gas processing method of SCR denitration |
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| CN111298621A (en) * | 2020-03-06 | 2020-06-19 | 南京理工大学 | Process and device for simultaneously desulfurizing and denitrifying ozone-coupled double-Ca-based absorbent of flue gas |
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| CN111545058A (en) * | 2020-03-30 | 2020-08-18 | 江苏峰业科技环保集团股份有限公司 | Coke oven flue gas denitration desulfurization waste heat utilization integrated device |
| CN111569652A (en) * | 2020-04-02 | 2020-08-25 | 江苏峰业科技环保集团股份有限公司 | Dry desulfurization, denitrification and purification integrated device for kiln flue gas |
| CN111715070A (en) * | 2020-05-25 | 2020-09-29 | 北京中航泰达环保科技股份有限公司 | Ultra-clean discharge system and method for desulfurization and denitrification treatment of boiler flue gas |
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| CN113828094A (en) * | 2021-10-14 | 2021-12-24 | 江苏峰业科技环保集团股份有限公司 | Semi-dry desulfurization and denitrification system |
| CN113877419A (en) * | 2021-09-16 | 2022-01-04 | 上海嘉德环境能源科技有限公司 | Low-temperature flue gas desulfurization and denitrification system and method for heat accumulating type steel rolling heating furnace |
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| CN109999656B (en) * | 2019-05-07 | 2024-03-08 | 福建龙净脱硫脱硝工程有限公司 | Combined treatment system and flue gas treatment method for realizing full-working-condition desulfurization and denitration of flue gas circulating fluidized bed desulfurization and SCR denitration |
| CN109999656A (en) * | 2019-05-07 | 2019-07-12 | 福建龙净脱硫脱硝工程有限公司 | Realize the flue gas circulating fluidized bed desulfurization of full working scope desulphurization denitration and the composite processing system and flue gas processing method of SCR denitration |
| CN110523158A (en) * | 2019-09-04 | 2019-12-03 | 武汉龙净环保科技有限公司 | The system and method that the comprehensive collaboration of titanium dioxide calcined by rotary kiln tail gas is administered |
| CN110898640A (en) * | 2019-10-22 | 2020-03-24 | 广西博世科环保科技股份有限公司 | Resource recycling type sewage station deodorization system and process |
| CN111298621A (en) * | 2020-03-06 | 2020-06-19 | 南京理工大学 | Process and device for simultaneously desulfurizing and denitrifying ozone-coupled double-Ca-based absorbent of flue gas |
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| CN111545058A (en) * | 2020-03-30 | 2020-08-18 | 江苏峰业科技环保集团股份有限公司 | Coke oven flue gas denitration desulfurization waste heat utilization integrated device |
| CN111569652A (en) * | 2020-04-02 | 2020-08-25 | 江苏峰业科技环保集团股份有限公司 | Dry desulfurization, denitrification and purification integrated device for kiln flue gas |
| CN111715068A (en) * | 2020-05-25 | 2020-09-29 | 北京中航泰达环保科技股份有限公司 | Ultra-clean discharge system and method for desulfurization, denitrification and waste heat recycling of coke oven flue gas |
| CN111715070A (en) * | 2020-05-25 | 2020-09-29 | 北京中航泰达环保科技股份有限公司 | Ultra-clean discharge system and method for desulfurization and denitrification treatment of boiler flue gas |
| CN113877419A (en) * | 2021-09-16 | 2022-01-04 | 上海嘉德环境能源科技有限公司 | Low-temperature flue gas desulfurization and denitrification system and method for heat accumulating type steel rolling heating furnace |
| CN113828094A (en) * | 2021-10-14 | 2021-12-24 | 江苏峰业科技环保集团股份有限公司 | Semi-dry desulfurization and denitrification system |
| CN114471113A (en) * | 2022-03-09 | 2022-05-13 | 山东康源环保科技有限公司 | Integrated synergistic treatment process for smoke dust, nitrate and sulfur NMHC in coking industry |
| CN117000040A (en) * | 2023-09-25 | 2023-11-07 | 北京利德衡环保工程有限公司 | Flue gas desulfurization, denitrification, dust removal and separation system |
| CN117000040B (en) * | 2023-09-25 | 2024-01-16 | 北京利德衡环保工程有限公司 | Flue gas desulfurization, denitrification, dust removal and separation system |
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