CN208893899U - A kind of flue gas purification device improving utilization rate of waste heat and denitrification rate - Google Patents
A kind of flue gas purification device improving utilization rate of waste heat and denitrification rate Download PDFInfo
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- CN208893899U CN208893899U CN201821101297.0U CN201821101297U CN208893899U CN 208893899 U CN208893899 U CN 208893899U CN 201821101297 U CN201821101297 U CN 201821101297U CN 208893899 U CN208893899 U CN 208893899U
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Abstract
A kind of flue gas purification device improving utilization rate of waste heat and denitrification rate, is moved towards according to flue gas, which includes the secondary absorption tower (2) of primary adsorption tower (1) and setting in primary adsorption tower (1) downstream；The device further includes Analytic Tower (3)；Analytic Tower (3) is equipped with bringing-up section (4) and cooling section (5) from top to bottom；Wherein, former smoke conveying duct (L0) is connected to primary adsorption tower flue gas entrance (101)；The first pipe (L1) drawn from primary adsorption tower flue gas outlet (102) is connected to secondary absorption tower flue gas entrance (201)；The second pipe (L2) that analytically the bringing-up section gas vent (402) of tower (3) is drawn is connected to secondary absorption tower flue gas entrance (201).The outer thermal wind exhausting of Analytic Tower bringing-up section is introduced secondary absorption tower by the utility model, efficiently uses this partial heat, the flue-gas temperature of secondary absorption tower inlet is improved, to improve denitration efficiency.
Description
Technical field
The utility model relates to activated carbon method flue gas purification devices, and in particular to a kind of raising utilization rate of waste heat and denitrification rate
Flue gas purification device, belong to smoke.
Background technique
For sintering flue gas exhaust temperature between 110-170 DEG C, SO is contained in the inside2、NOx, dust, dioxin, heavy metal etc. it is more
Kind of pollutant, and active carbon flue gases purification is suitable for sintering flue gas temperature discharge section just, it can be achieved that multi-pollutant association
Same high-efficient purification can remove multiple pollutant simultaneously on a set of equipment, realize by-product SO2Resource utilization, and should
The advantages that technology has pollutant removing high-efficient, does not consume water resource substantially, without secondary pollution.Active carbon flue gas purification device
Multiple subsystems such as adsorption system, resolution system, acid making system are provided with, flue gas passes through activated carbon adsorption unit after-purification, living
Property charcoal particle circulated between absorbing unit and resolution unit, realize that " absorption pollutant → heating parsing activation (makes to pollute
Object evolution) → cooling → absorption pollutant " and recycle.
Activated carbon adsorption is divided into single stage adsorption at present and twin-stage adsorbs two ways, and single stage adsorption is in an adsorption tower
Multiple pollutant is adsorbed simultaneously, and ammonia is added in adsorption column inlet, this kind of method can achieve SO2Removal efficiency > 98%, denitration
Rate about 50%, dust outlet concentration are less than 20mg/Nm3.With the raising of environmental requirement, part iron factory is adsorbed using twin-stage,
Wherein first stage tower carries out desulfurization, dedusting etc., and second level tower carries out denitration, this kind of method can achieve SO2Removal efficiency > 98% takes off
Nitre rate is greater than 80%, and dust outlet concentration is less than 10mg/Nm3.Active carbon resolution system passes through Combustion of Hot Air Furnace blast furnace gas, coke
The fuel such as producer gas carry out indirect heating to active carbon, therefore contain the SO of about 100ppm in the high-temperature gas after burning2Gas,
Its temperature is about at 300 DEG C or so.The high-temperature gas after the burning is mostly used in hot air circulation at present, for reducing blast furnace coal
The application of gas, coke-stove gas or other fuel, while in order to keep pressure and oxygen content in hot air circulating system to stablize, when needing
It carves and is discharged into flue, capacity is about the 10% of internal circulating load outside this part, and about 300 DEG C of temperature or so.
The scheme of the prior art is as illustrated in fig. 1 and 2, activated carbon method gas cleaning schematic diagram, and wherein attached drawing 1 is that adsorption tower is left
Right arrangement, attached drawing 2 are that adsorption tower is arranged up and down, and two kinds of arrangements are able to satisfy the collaboration removal of multi-pollutant, with Jie of attached drawing 1
Continue process flow: the sintering original flue gas containing multiple pollutant carries out desulfurization and dedusting by first grade desulfurizing tower, subsequently into adsorption tower
Carry out denitration, NH3It is added in secondary absorption tower entrance.Active carbon is sent to second level tower after Analytic Tower is parsed, by second level
Active carbon after tower denitration is sent to first stage tower by transportation system, and the first stage tower active carbon after adsorbing desulfurization and dedusting passes through again
Transportation system is sent to Analytic Tower, completes primary complete Matter Transfer.Exist in the heat gas of direct emission in the prior art
Micro SO2Outlet impacts environment, and can not make full use of the heat of outlet, causes the waste of heat.
Therefore, the heat of capacity is not fully used outside this part discharged into flue, causes energy waste.
Moreover, capacity contains SO outside this part2Gas, direct outlet pollute surrounding enviroment.
Utility model content
The purpose of this utility model is that preventing SO contained in the hot air circulation gas for parsing2Direct outlet is
Solve the problems, such as this, the utility model, which provides one kind, can remove outlet SO2The flue gas purification device of concentration.The device will with to
The outer thermal wind exhausting of a part after parsing active carbon heat exchange introduces the smoke inlet of secondary absorption tower, on the one hand removes outlet SO2It is dense
Degree, while the flue gas of secondary absorption tower inlet is heated, flue-gas temperature is improved.In general, secondary absorption tower inlet
The SO of flue gas2Concentration is lower, and temperature correspondinglys increase, and denitrification rate is higher.Therefore, the device is in removal outlet SO2Concentration it is same
When, also improve denitration efficiency and utilization rate of waste heat.
The first embodiment according to the present utility model, provide it is a kind of raising utilization rate of waste heat and denitrification rate flue gas it is net
Makeup is set:
A kind of flue gas purification device improving utilization rate of waste heat and denitrification rate, is moved towards, which includes level-one according to flue gas
Adsorption tower and the secondary absorption tower that primary adsorption tower downstream is set.Primary adsorption tower be equipped with primary adsorption tower flue gas entrance and
The outlet of primary adsorption tower flue gas.Secondary absorption tower is equipped with secondary absorption tower flue gas entrance and secondary absorption tower flue gas exports.It should
Device further includes Analytic Tower.Analytic Tower is equipped with a heating section and a cooling section from top to bottom.The lower part of bringing-up section is equipped with bringing-up section gas
The top of entrance, bringing-up section is equipped with bringing-up section gas vent.
Wherein, former smoke conveying duct is connected to primary adsorption tower flue gas entrance.It exports and draws from primary adsorption tower flue gas
First pipe be connected to secondary absorption tower flue gas entrance.The third pipeline connection that analytically the bringing-up section gas vent of tower is drawn
To secondary absorption tower flue gas entrance.
In the present invention, the side (such as right side) of primary adsorption tower is arranged in the secondary absorption tower.Level-one is inhaled
The top of attached tower is equipped with primary adsorption tower active carbon entrance, and the bottom of primary adsorption tower is exported equipped with primary adsorption tower active carbon.
The top of secondary absorption tower is equipped with secondary absorption tower active carbon entrance, and the bottom of secondary absorption tower is equipped with secondary absorption tower active carbon
Outlet.The top of Analytic Tower is equipped with Analytic Tower active carbon entrance, and the bottom of Analytic Tower is exported equipped with Analytic Tower active carbon.
Wherein, primary adsorption tower active carbon outlet is connect with Analytic Tower active carbon entrance.Analytic Tower active carbon outlet and two
Grade adsorption tower active carbon entrance connection.The outlet of secondary absorption tower active carbon is connect with primary adsorption tower active carbon entrance.
Preferably, which further includes hot-blast stove.Hot-blast stove is equipped with hot-wind inlet and hot-blast outlet.From hot-blast stove
The 4th pipeline that hot-blast outlet is drawn is connected to the bringing-up section gas access of Analytic Tower, the 5th drawn from bringing-up section gas vent
Pipeline is connected to the hot-wind inlet of hot-blast stove.Second pipe is the branch that the 4th pipeline separates.
Preferably, being additionally provided with wind-supplying mouth on hot-blast stove.
Preferably, which further includes the first conveyer, for by active carbon to be regenerated from primary adsorption tower active carbon
Outlet is delivered to Analytic Tower active carbon entrance.The device further includes second conveyor, for by regenerated carbon, analytically tower to be living
Property charcoal outlet be delivered to secondary absorption tower active carbon entrance.The device further includes third conveyer, for by the activity after denitration
Charcoal is delivered to primary adsorption tower active carbon entrance from the outlet of secondary absorption tower active carbon.
Preferably, which further includes cooling blower.The lower part of the cooling section of Analytic Tower is equipped with cooling section gas access,
The top of cooling section is equipped with cooling section gas vent.The air outlet of cooling blower is connected to cooling section gas via the 5th pipeline and enters
Mouthful.
Preferably, ammonia jetting device is equipped at the smoke inlet of secondary absorption tower, and ammonia jetting device is arranged
In the downstream of second pipe and secondary absorption tower link position.
Preferably, which further includes chimney.The outlet of secondary absorption tower flue gas is connected to chimney via the 6th pipeline.
Second of embodiment according to the present utility model, provide it is a kind of raising utilization rate of waste heat and denitrification rate flue gas it is net
Makeup is set:
A kind of flue gas purification device improving utilization rate of waste heat and denitrification rate, is moved towards, which includes level-one according to flue gas
Adsorption tower and the secondary absorption tower that primary adsorption tower downstream is set.Primary adsorption tower be equipped with primary adsorption tower flue gas entrance and
The outlet of primary adsorption tower flue gas.Secondary absorption tower is equipped with secondary absorption tower flue gas entrance and secondary absorption tower flue gas exports.It should
Device further includes Analytic Tower.Analytic Tower is equipped with a heating section and a cooling section from top to bottom.The lower part of bringing-up section is equipped with bringing-up section gas
The top of entrance, bringing-up section is equipped with bringing-up section gas vent.
Wherein, former smoke conveying duct is connected to primary adsorption tower flue gas entrance.The analytically bringing-up section gas vent of tower
The third pipeline of extraction is connected to secondary absorption tower flue gas entrance.
In the present invention, the top of primary adsorption tower is arranged in the secondary absorption tower.The top of secondary absorption tower
Equipped with secondary absorption tower active carbon entrance.The bottom of primary adsorption tower is exported equipped with primary adsorption tower active carbon.The top of Analytic Tower
Portion is equipped with Analytic Tower active carbon entrance, and the bottom of Analytic Tower is exported equipped with Analytic Tower active carbon.
Wherein, primary adsorption tower active carbon outlet is connect with Analytic Tower active carbon entrance.Analytic Tower active carbon outlet and two
Grade adsorption tower active carbon entrance connection.
Preferably, which further includes hot-blast stove.Hot-blast stove is equipped with hot-wind inlet and hot-blast outlet.From hot-blast stove
The 4th pipeline that hot-blast outlet is drawn is connected to the bringing-up section gas access of Analytic Tower, the 5th drawn from bringing-up section gas vent
Pipeline is connected to the hot-wind inlet of hot-blast stove.Second pipe is the branch that the 4th pipeline separates.
Preferably, being additionally provided with wind-supplying mouth on hot-blast stove.
Preferably, which further includes the first conveyer, for by active carbon to be regenerated from primary adsorption tower active carbon
Outlet is delivered to Analytic Tower active carbon entrance.The device further includes second conveyor, for by regenerated carbon, analytically tower to be living
Property charcoal outlet be delivered to secondary absorption tower active carbon entrance.
Preferably, which further includes cooling blower.The lower part of the cooling section of Analytic Tower is equipped with cooling section gas access,
The top of cooling section is equipped with cooling section gas vent.The air outlet of cooling blower is connected to cooling section gas via the 5th pipeline and enters
Mouthful.
Preferably, ammonia jetting device is equipped at the smoke inlet of secondary absorption tower, and ammonia jetting device is arranged
In the downstream of second pipe and secondary absorption tower link position.
Preferably, which further includes chimney.The outlet of secondary absorption tower flue gas is connected to chimney via the 6th pipeline.
In the present invention, adsorption tower includes primary adsorption tower and secondary absorption tower, adsorbs tower structure for two-stage.Its
In, primary adsorption tower and secondary absorption tower can control arrangement, i.e. secondary absorption tower side that primary adsorption tower is arranged in.Level-one
Adsorption tower and secondary absorption tower can also arrange up and down, i.e. secondary absorption tower top that primary adsorption tower is arranged in.Gas cleaning
In the process, (sintering) containing multiple pollutant former flue gas carries out desulfurization and dedusting by primary adsorption tower, subsequently into secondary absorption
Tower carries out denitration, NH3It is added in the smoke inlet of secondary absorption tower.Active carbon is defeated by second after Analytic Tower is parsed
It send machine to be sent to secondary absorption tower, primary adsorption is sent to by third conveyer by the active carbon after secondary absorption tower denitration
Tower passes through the first conveyer by the active carbon after primary adsorption tower desulfurization and dedusting again and is sent to Analytic Tower, completes primary complete
Matter Transfer.
The main purpose of Analytic Tower is to carry out heating regeneration to the active carbon for having adsorbed pollutant.Analytic Tower divides from top to bottom
For a heating section and a cooling section, described a heating section and a cooling section have shell pipe type or pipe type heat exchanger structure.Active carbon passes through respectively
By the tube side of a heating section and a cooling section, and heat gas in bringing-up section via shell side, cooling wind is in cooling section via shell side.
Buffer area or middle area with a receiving active carbon between a heating section and a cooling section.It lives again in Analytic Tower for heating
Property charcoal the combustion heat of the heat from blast furnace gas or coke-stove gas or other materials, such as hot-blast stove exhaust or hot wind or heat it is empty
The bringing-up section gas access of gas, hot wind analytically tower enters Analytic Tower, carries out indirect heat exchange with active carbon to be resolved.Heat exchange heat
The temperature that wind enters Analytic Tower is 400-500 DEG C, and preferably 410-470 DEG C, more preferably 430-450 DEG C heat after heat exchange
The delivery temperature of section gas vent is 300-380 DEG C, preferably 320-375 DEG C, more preferably 340-370 DEG C.In general, hot wind into
Enter Analytic Tower and active carbon indirect heat exchange, the hot wind after heat exchange is heated further through hot-blast stove and is recycled, in order to keep
The stabilization of pressure and oxygen content in hot air circulating system, the utility model analytically tower bringing-up section gas vent draw second pipe
Road (or branch of the 4th pipeline) is connected to the smoke inlet of secondary absorption tower, the part hot wind after exchanging with active carbon
(5-40% (preferably 8-30%, more preferably 10-20%)) introduces secondary absorption tower, on the one hand can remove circulating air
In SO2, this partial heat on the other hand can be efficiently used, the flue-gas temperature of secondary absorption tower inlet is improved, to mention
High denitration efficiency, while the dosage of ammonia can be reduced.
It is well known that using the device of activated carbon method flue gas desulfurization and denitrification, flue-gas temperature has pollutant removal
Great influence, favors low temperature facilitate denitration reaction in desulphurization reaction, high temperature.
Analytic Tower bringing-up section is used for the hot wind of heating of Activated charcoal, and from the hot wind that bringing-up section gas vent is discharged, part is outer
Capacity is about 10%, SO of internal circulating load2Content about 100ppm, but since outer discharge capacity is far smaller than exhaust gas volumn to be processed, warp
It, will not be to SO in discharge gas at smoke stack emission after crossing the processing of secondary absorption tower2Concentration causes big influence.The utility model
Purpose is to prevent SO contained in the hot air circulation gas for parsing2Direct outlet.
In the device of the utility model, it will be used to heat the hot wind of active carbon in Analytic Tower, analytically tower bringing-up section is discharged
With active carbon heat exchange after hot wind in a part (such as 5-40%, preferably 8-30%, more preferably 10-20%) pass through
Second pipe is delivered at the smoke inlet of secondary absorption tower；It changes the skill of the part hot wind direct emission in the prior art
Art scheme.It is handled, is avoided by the way that part hot wind of the Analytic Tower heat exchanging segment after heat exchange is delivered to secondary absorption tower
The direct outlet of part hot wind, has prevented pollution of the pollutant to environment in the hot wind.Simultaneously as the temperature of the part hot wind
It is higher, it is delivered to the air inlet of secondary absorption tower, is mixed with the original flue gas into secondary absorption tower, is improved entire into two
The flue-gas temperature of grade adsorption tower, improves secondary absorption tower to the out of stock efficiency of flue gas.
In addition, in the prior art, due to discharging SO to control using by the direct outlet of part circulating air2Amount, only
Few a part of hot wind can be subjected to outlet, constrain the heat exchange efficiency of circulating air and active carbon；Since internal circulating load is less, mend
The air quantity being charged into hot-blast stove is also smaller, and therefore, in the program, hot-blast stove is constantly in hypoxia burning, causes fuel not
Energy full combustion, causes the waste of resource.Using the design of the application, since part circulating air is delivered to secondary absorption
Tower, secondary absorption tower can be handled the part hot wind, therefore, can be according to need after treatment from smoke stack emission
It wants, therefore the hot blast rate that increase is delivered to secondary absorption tower can fill into a greater amount of air from the gas supplementing opening of hot-blast stove, increase
Add the oxygen content in hot-blast stove, improved the combustion rate of fuel, made its full combustion, saves fuel source；Simultaneously as
Fuel combustion is abundant, and calorific value is higher, also improve from hot-blast stove convey hot wind enter Analytic Tower after, the heat exchange of hot wind and active carbon
Efficiency.
Using the device of the application, the temperature of the flue gas after the processing of primary adsorption tower also can detecte, according to active carbon
The best theoretical temperatures of denitration process are carried out to flue gas, control is delivered to the hot blast rate of secondary absorption tower from second pipe, so that
The part hot wind is delivered to secondary absorption tower, and treated after flue gas mixes by primary adsorption tower, the temperature of mixed gas
Degree improves secondary absorption tower to the denitration efficiency of flue gas to be most suitable for the temperature that active carbon carries out denitration process.If by one
The temperature of flue gas is higher after grade adsorption tower processing, reduces the hot blast rate that secondary absorption tower is delivered to from second pipe；If by
The temperature of flue gas is lower after the processing of primary adsorption tower, increases the hot blast rate that secondary absorption tower is delivered to from second pipe.
Therefore, using the device of the utility model, wind Analytic Tower being used in the circulating air of heating of Activated charcoal
It is delivered to secondary absorption tower: first, it avoids by the direct outlet of part hot wind, due to SO in hot wind2Presence bring pollution
The problem of environment；Second, due to the part, hot wind is delivered to secondary absorption tower, can increase and branch to second level from circulating air
The hot blast rate of adsorption tower improves the efficiency of combustion of fuel in hot-blast stove, economizes on resources；Third, the part hot wind are delivered to second level
Adsorption tower, and treated after flue gas mixes by primary adsorption tower, improves the temperature of the flue gas to be processed in secondary absorption tower
Degree, improves denitration efficiency.
Wherein: the height of Analytic Tower is 8-30 meters, preferably 10-25 meters, more preferably 12-20 meters；Such as 15m or so.
The diameter of second pipe be 0.1-1.2 meters, preferably 0.2-1.0 meters, further preferably 0.3-0.8 meters, more preferably 0.4-
0.6 meter.
Compared with prior art, the utility model has following advantageous effects:
1, utility model device analytically tower bringing-up section gas vent draw second pipe be connected to secondary absorption tower
Smoke inlet, by the prior art analytically the direct outlet of bringing-up section gas vent of tower hot wind introduce secondary absorption tower,
Effectively prevent SO contained in this part hot wind2Direct outlet, reduces environmental pollution；
2, the utility model will introduce secondary absorption tower with the part hot wind after active carbon heat exchange, efficiently use this part
Heat improves the flue-gas temperature of secondary absorption tower inlet, to improve denitration efficiency；
3, in the present invention, the hot wind of the bringing-up section discharge of Analytic Tower is via the 4th pipeline to hot-blast stove, warm
The high-temperature gas that wind furnace generates constantly via third pipeline to bringing-up section gas access, forms hot air circulation again, meanwhile, by
There is part to be introduced into secondary absorption tower in the hot wind of bringing-up section discharge, therefore be additionally provided with wind-supplying mouth on hot-blast stove, wind-supplying mouth to
Hot-blast stove input air, reduces thermal losses to the maximum extent, enhances the utilization rate of bringing-up section heat；
4, the utility model can be used for being sintered, coking, the various actives charcoal smoke gas treatment field such as waste incineration, it is especially suitable
In the operating condition of low exhaust gas volumn, heating effect and the better effect for improving denitrification rate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that flue gas purification device will heat hot wind outlet in the prior art；
Fig. 2 is the structural schematic diagram that flue gas purification device will heat hot wind outlet in the prior art；
Fig. 3 is the schematic diagram for the flue gas purification device that the utility model improves utilization rate of waste heat and denitrification rate；
Fig. 4 is the signal of another structure for the flue gas purification device that the utility model improves utilization rate of waste heat and denitrification rate
Figure；
Fig. 5 is the graph of relation of flue-gas temperature and denitrification rate.
Appended drawing reference: 1: primary adsorption tower；101: primary adsorption tower flue gas entrance；102: the outlet of primary adsorption tower flue gas；
103: primary adsorption tower active carbon entrance；104: the outlet of primary adsorption tower active carbon；2: secondary absorption tower；201: secondary absorption tower
Smoke inlet；202: the outlet of secondary absorption tower flue gas；203: secondary absorption tower active carbon entrance；204: secondary absorption tower active carbon
Outlet；3: Analytic Tower；301: Analytic Tower active carbon entrance；302: the outlet of Analytic Tower active carbon；4: bringing-up section；401: bringing-up section gas
Body entrance；402: bringing-up section gas vent；5: cooling section；501: cooling section gas access；502: cooling section gas vent；6: heat
Wind furnace；601: hot-wind inlet；602: hot-blast outlet；603: wind-supplying mouth；7: the first conveyers；8: second conveyor；9: third is defeated
Send machine；10: cooling blower；11: chimney；
L0: former smoke conveying duct；L1: first pipe；L2: second pipe；L3: third pipeline；L4: the four pipeline；
L5: the five pipeline；L6: the six pipeline.
Specific embodiment
The first embodiment according to the present utility model, provide it is a kind of raising utilization rate of waste heat and denitrification rate flue gas it is net
Makeup is set:
A kind of flue gas purification device improving utilization rate of waste heat and denitrification rate, is moved towards, which includes level-one according to flue gas
Adsorption tower 1 and the secondary absorption tower 2 that 1 downstream of primary adsorption tower is set.Primary adsorption tower 1 is equipped with primary adsorption tower flue gas and enters
Mouth 101 and primary adsorption tower flue gas outlet 102.Secondary absorption tower 2 is equipped with secondary absorption tower flue gas entrance 201 and second level is inhaled
Attached tower flue gas outlet 202.The device further includes Analytic Tower 3.Analytic Tower 3 is equipped with bringing-up section 4 and cooling section 5 from top to bottom.Heating
The lower part of section 4 is equipped with bringing-up section gas access 401, and the top of bringing-up section 4 is equipped with bringing-up section gas vent 402.
Wherein, former smoke conveying duct L0 is connected to primary adsorption tower flue gas entrance 101.It is exported from primary adsorption tower flue gas
The 102 first pipe L1 drawn are connected to secondary absorption tower flue gas entrance 201.The analytically bringing-up section gas vent 402 of tower 3
The third pipeline L3 of extraction is connected to secondary absorption tower flue gas entrance 201.
In the present invention, the side (such as right side) of primary adsorption tower 1 is arranged in the secondary absorption tower 2.Level-one
The top of adsorption tower 1 is equipped with primary adsorption tower active carbon entrance 103, and the bottom of primary adsorption tower 1 is equipped with primary adsorption tower activity
Charcoal outlet 104.The top of secondary absorption tower 2 is equipped with secondary absorption tower active carbon entrance 203, and the bottom of secondary absorption tower 2 is equipped with
Secondary absorption tower active carbon outlet 204.The top of Analytic Tower 3 is equipped with Analytic Tower active carbon entrance 301, and the bottom of Analytic Tower 3 is set
There is Analytic Tower active carbon to export 302.
Wherein, primary adsorption tower active carbon outlet 104 is connect with Analytic Tower active carbon entrance 301.Analytic Tower active carbon goes out
Mouth 302 is connect with secondary absorption tower active carbon entrance 203.Secondary absorption tower active carbon outlet 204 and primary adsorption tower active carbon
Entrance 103 connects.
Preferably, which further includes hot-blast stove 6.Hot-blast stove 6 is equipped with hot-wind inlet 601 and hot-blast outlet 602.From
The 4th pipeline L4 that the hot-blast outlet 602 of hot-blast stove 6 is drawn is connected to the bringing-up section gas access 401 of Analytic Tower 3, from bringing-up section
The 5th pipeline L5 that gas vent 402 is drawn is connected to the hot-wind inlet 601 of hot-blast stove 6.Second pipe L2 is the 4th pipeline L4
The branch separated.
Preferably, being additionally provided with wind-supplying mouth 603 on hot-blast stove 6.
Preferably, which further includes the first conveyer 7, for by active carbon to be regenerated from primary adsorption tower active carbon
Outlet 104 is delivered to Analytic Tower active carbon entrance 301.The device further includes second conveyor 8, for by regenerated carbon from
Analytic Tower active carbon outlet 302 is delivered to secondary absorption tower active carbon entrance 203.The device further includes third conveyer 9, is used for
Active carbon after denitration is delivered to primary adsorption tower active carbon entrance 103 from secondary absorption tower active carbon outlet 204.
Preferably, which further includes cooling blower 10.The lower part of the cooling section 5 of Analytic Tower 3 is equipped with cooling section gas
The top of entrance 501, cooling section 5 is equipped with cooling section gas vent 502.The air outlet of cooling blower 10 is via the 5th pipeline L5
It is connected to cooling section gas access 501.
Preferably, ammonia jetting device is equipped at the smoke inlet of secondary absorption tower 2, and ammonia jetting device is arranged
In the downstream of second pipe L2 and 2 link position of secondary absorption tower.
Preferably, which further includes chimney 11.Secondary absorption tower flue gas outlet 202 is connected to via the 6th pipeline L6
Chimney 11.
Second of embodiment according to the present utility model, provide it is a kind of raising utilization rate of waste heat and denitrification rate flue gas it is net
Makeup is set:
A kind of flue gas purification device improving utilization rate of waste heat and denitrification rate, is moved towards, which includes level-one according to flue gas
Adsorption tower 1 and the secondary absorption tower 2 that 1 downstream of primary adsorption tower is set.Primary adsorption tower 1 is equipped with primary adsorption tower flue gas
Entrance 101 and primary adsorption tower flue gas outlet 102.Secondary absorption tower 2 is equipped with secondary absorption tower flue gas entrance 201 and second level
Adsorption tower exhanst gas outlet 202.The device further includes Analytic Tower 3.Analytic Tower 3 is equipped with bringing-up section 4 and cooling section 5 from top to bottom.Add
The lower part of hot arc 4 is equipped with bringing-up section gas access 401, and the top of bringing-up section 4 is equipped with bringing-up section gas vent 402.
Wherein, former smoke conveying duct L0 is connected to primary adsorption tower flue gas entrance 101.The analytically bringing-up section gas of tower 3
The third pipeline L3 that body outlet 402 is drawn is connected to secondary absorption tower flue gas entrance 201.
In the present invention, the top of primary adsorption tower 1 is arranged in the secondary absorption tower 2.The top of secondary absorption tower 2
Portion is equipped with secondary absorption tower active carbon entrance 203.The bottom of primary adsorption tower 1 is equipped with primary adsorption tower active carbon outlet 104.Solution
The top for analysing tower 3 is equipped with Analytic Tower active carbon entrance 301, and the bottom of Analytic Tower 3 is equipped with Analytic Tower active carbon outlet 302.
Wherein, primary adsorption tower active carbon outlet 104 is connect with Analytic Tower active carbon entrance 301.Analytic Tower active carbon goes out
Mouth 302 is connect with secondary absorption tower active carbon entrance 203.
Preferably, which further includes hot-blast stove 6.Hot-blast stove 6 is equipped with hot-wind inlet 601 and hot-blast outlet 602.From
The 4th pipeline L4 that the hot-blast outlet 602 of hot-blast stove 6 is drawn is connected to the bringing-up section gas access 401 of Analytic Tower 3, from bringing-up section
The 5th pipeline L5 that gas vent 402 is drawn is connected to the hot-wind inlet 601 of hot-blast stove 6.Second pipe L2 is the 4th pipeline L4
The branch separated.
Preferably, being additionally provided with wind-supplying mouth 603 on hot-blast stove 6.
Preferably, which further includes the first conveyer 7, for by active carbon to be regenerated from primary adsorption tower active carbon
Outlet 104 is delivered to Analytic Tower active carbon entrance 301.The device further includes second conveyor 8, for by regenerated carbon from
Analytic Tower active carbon outlet 302 is delivered to secondary absorption tower active carbon entrance 203.
Preferably, which further includes cooling blower 10.The lower part of the cooling section 5 of Analytic Tower 3 is equipped with cooling section gas
The top of entrance 501, cooling section 5 is equipped with cooling section gas vent 502.The air outlet of cooling blower 10 is via the 5th pipeline L5
It is connected to cooling section gas access 501.
Preferably, ammonia jetting device is equipped at the smoke inlet of secondary absorption tower 2, and ammonia jetting device is arranged
In the downstream of second pipe L2 and 2 link position of secondary absorption tower.
Preferably, which further includes chimney 11.Secondary absorption tower flue gas outlet 202 is connected to via the 6th pipeline L6
Chimney 11.
Embodiment 1
As shown in Figure 1, a kind of flue gas purification device for improving utilization rate of waste heat and denitrification rate, is moved towards, the dress according to flue gas
It sets including primary adsorption tower 1 and the secondary absorption tower 2 that 1 downstream of primary adsorption tower is arranged in.Primary adsorption tower 1 is inhaled equipped with level-one
Attached tower flue gas entrance 101 and primary adsorption tower flue gas outlet 102.Secondary absorption tower 2 is equipped with secondary absorption tower flue gas entrance 201
With secondary absorption tower flue gas outlet 202.The device further includes Analytic Tower 3.Analytic Tower 3 is equipped with bringing-up section 4 and cooling from top to bottom
Section 5.The lower part of bringing-up section 4 is equipped with bringing-up section gas access 401, and the top of bringing-up section 4 is equipped with bringing-up section gas vent 402.Its
In, former smoke conveying duct L0 is connected to primary adsorption tower flue gas entrance 101.It is drawn from primary adsorption tower flue gas outlet 102
First pipe L1 is connected to secondary absorption tower flue gas entrance 201.The analytically third that the bringing-up section gas vent 402 of tower 3 is drawn
Pipeline L3 is connected to secondary absorption tower flue gas entrance 201.
The right side of primary adsorption tower 1 is arranged in the secondary absorption tower 2.The top of primary adsorption tower 1 is equipped with primary adsorption
Tower active carbon entrance 103, the bottom of primary adsorption tower 1 are equipped with primary adsorption tower active carbon outlet 104.The top of secondary absorption tower 2
Portion is equipped with secondary absorption tower active carbon entrance 203, and the bottom of secondary absorption tower 2 is equipped with secondary absorption tower active carbon outlet 204.Solution
The top for analysing tower 3 is equipped with Analytic Tower active carbon entrance 301, and the bottom of Analytic Tower 3 is equipped with Analytic Tower active carbon outlet 302.The dress
Setting further includes the first conveyer 7, living for active carbon to be regenerated to be delivered to Analytic Tower from primary adsorption tower active carbon outlet 104
Property charcoal entrance 301.The device further includes second conveyor 8, for by regenerated carbon, analytically tower active carbon outlet 302 to be conveyed
To secondary absorption tower active carbon entrance 203.The device further includes third conveyer 9, for by the active carbon after denitration from second level
Adsorption tower active carbon outlet 204 is delivered to primary adsorption tower active carbon entrance 103.
The device further includes hot-blast stove 6.Hot-blast stove 6 is equipped with hot-wind inlet 601 and hot-blast outlet 602.From hot-blast stove 6
The 4th pipeline L4 that hot-blast outlet 602 is drawn is connected to the bringing-up section gas access 401 of Analytic Tower 3, from bringing-up section gas vent
402 the 5th pipeline L5 drawn are connected to the hot-wind inlet 601 of hot-blast stove 6.Wind-supplying mouth 603 is additionally provided on hot-blast stove 6.Second
Pipeline L2 is the branch that the 4th pipeline L4 is separated.
The device further includes cooling blower 10.The lower part of the cooling section 5 of Analytic Tower 3 is equipped with cooling section gas access 501, cold
But the top of section 5 is equipped with cooling section gas vent 502.The air outlet of cooling blower 10 is connected to cooling section via the 5th pipeline L5
Gas access 501.
The device further includes chimney 11.Secondary absorption tower flue gas outlet 202 is connected to chimney 11 via the 6th pipeline L6.
Embodiment 2
As shown in Fig. 2, a kind of flue gas purification device for improving utilization rate of waste heat and denitrification rate, is moved towards, the dress according to flue gas
It sets including primary adsorption tower 1 and the secondary absorption tower 2 that 1 downstream of primary adsorption tower is arranged in.Primary adsorption tower 1 is inhaled equipped with level-one
Attached tower flue gas entrance 101 and primary adsorption tower flue gas outlet 102.Secondary absorption tower 2 is equipped with secondary absorption tower flue gas entrance 201
With secondary absorption tower flue gas outlet 202.The device further includes Analytic Tower 3.Analytic Tower 3 is equipped with bringing-up section 4 and cooling from top to bottom
Section 5.The lower part of bringing-up section 4 is equipped with bringing-up section gas access 401, and the top of bringing-up section 4 is equipped with bringing-up section gas vent 402.Its
In, former smoke conveying duct L0 is connected to primary adsorption tower flue gas entrance 101.The analytically bringing-up section gas vent 402 of tower 3
The third pipeline L3 of extraction is connected to secondary absorption tower flue gas entrance 201.
The top of primary adsorption tower 1 is arranged in the secondary absorption tower 2.The top of secondary absorption tower 2 is equipped with secondary absorption
Tower active carbon entrance 203.The bottom of primary adsorption tower 1 is equipped with primary adsorption tower active carbon outlet 104.The top of Analytic Tower 3 is set
There is Analytic Tower active carbon entrance 301, the bottom of Analytic Tower 3 is equipped with Analytic Tower active carbon outlet 302.The device further includes first defeated
Machine 7 is sent, for active carbon to be regenerated to be delivered to Analytic Tower active carbon entrance 301 from primary adsorption tower active carbon outlet 104.
The device further includes second conveyor 8, for by regenerated carbon, analytically tower active carbon outlet 302 to be delivered to secondary absorption tower
Active carbon entrance 203.
The device further includes hot-blast stove 6.Hot-blast stove 6 is equipped with hot-wind inlet 601 and hot-blast outlet 602.From hot-blast stove 6
The 4th pipeline L4 that hot-blast outlet 602 is drawn is connected to the bringing-up section gas access 401 of Analytic Tower 3, from bringing-up section gas vent
402 the 5th pipeline L5 drawn are connected to the hot-wind inlet 601 of hot-blast stove 6.Wind-supplying mouth 603 is additionally provided on hot-blast stove 6.Second
Pipeline L2 is the branch that the 4th pipeline L4 is separated.
The device further includes cooling blower 10.The lower part of the cooling section 5 of Analytic Tower 3 is equipped with cooling section gas access 501, cold
But the top of section 5 is equipped with cooling section gas vent 502.The air outlet of cooling blower 10 is connected to cooling section via the 5th pipeline L5
Gas access 501.
The device further includes chimney 11.Secondary absorption tower flue gas outlet 202 is connected to chimney 11 via the 6th pipeline L6.
Embodiment 3
Embodiment 1 is repeated, ammonia jetting device is only equipped at the smoke inlet of secondary absorption tower 2, and ammonia sprays into
The downstream of second pipe L2 Yu 2 link position of secondary absorption tower is arranged in device.
Use embodiment 1
Using the flue gas purification device in embodiment 1, it to be used for 600000Nm3/ h, the working condition that flue-gas temperature is 140 DEG C
Under, thermal wind exhausting outside Analytic Tower bringing-up section is introduced into secondary absorption tower, wherein the hot blast rate introduced is 6000Nm3/h(SO2Concentration exists
100ppm), the hot blast rate for introducing secondary absorption tower is only the 1/100 of raw flue gas amount, the SO in mixed flue gas2Concentration also pole
It is low, denitration will not be impacted.
Calculate flue gas heating value after mixing:
1. secondary absorption tower inlet original obvious heat of smoke:
Q1=600000Nm3/h*140℃*0.32Kcal/Nm3DEG C=2.688*107kcal/h；
2. analytically introducing the hot wind sensible heat of secondary absorption tower in the bringing-up section discharge hot wind of tower:
Q2=6000Nm3/h*300℃*0.337Kcal/Nm3DEG C=0.606*106kcal/h；
3. flue gas and the introducing mixed temperature of hot wind:
T=(2.688*107+0.606*106)/(600000*0.32+6000*0.337)=141.67；
After thermal wind exhausting outside Analytic Tower is introduced secondary absorption tower, flue-gas temperature rising value are as follows:
T=141.67 DEG C -140 DEG C=1.67 DEG C of Δ.
Attached drawing 5 show influence of the flue-gas temperature to denitrification rate, from attached drawing 5 it is found that flue-gas temperature improve, denitrification rate by
It gradually improves, especially in 140-160 DEG C of temperature range, as temperature improves, the denitrification rate rate of climb is faster.It can from above-mentioned calculating
Know, the outer thermal wind exhausting of Analytic Tower bringing-up section is introduced into secondary absorption tower entrance, and flue-gas temperature improves 1-2 DEG C, and denitrification rate can mention
It is high by 1%.In addition, can improve introduce two as far as possible under the premise of guaranteeing active carbon resolution factor to pursue higher denitration efficiency
The hot blast rate of grade adsorption tower.
Claims (23)
1. a kind of flue gas purification device for improving utilization rate of waste heat and denitrification rate, is moved towards according to flue gas, which includes that level-one is inhaled
Attached tower (1) and setting primary adsorption tower (1) downstream secondary absorption tower (2)；Primary adsorption tower (1) is equipped with primary adsorption tower
Smoke inlet (101) and primary adsorption tower flue gas outlet (102)；Secondary absorption tower (2) is equipped with secondary absorption tower flue gas entrance
(201) and secondary absorption tower flue gas exports (202)；The device further includes Analytic Tower (3)；Analytic Tower (3) is equipped with from top to bottom to be added
Hot arc (4) and cooling section (5)；The lower part of bringing-up section (4) is equipped with bringing-up section gas access (401), and the top of bringing-up section (4) is equipped with
Bringing-up section gas vent (402)；
It is characterized in that, former smoke conveying duct (L0) is connected to primary adsorption tower flue gas entrance (101)；From primary adsorption tower cigarette
The first pipe (L1) that gas outlet (102) is drawn is connected to secondary absorption tower flue gas entrance (201)；The analytically heating of tower (3)
The second pipe (L2) that section gas vent (402) is drawn is connected to secondary absorption tower flue gas entrance (201)；
Wherein: the height of Analytic Tower (3) is 8-30 meters.
2. flue gas purification device according to claim 1, it is characterised in that: the device further includes hot-blast stove (6)；Hot-blast stove
(6) hot-wind inlet (601) and hot-blast outlet (602) are equipped with；The third pipe drawn from the hot-blast outlet (602) of hot-blast stove (6)
Road (L3) is connected to the bringing-up section gas access (401) of Analytic Tower (3), the 4th pipe drawn from bringing-up section gas vent (402)
Road (L4) is connected to the hot-wind inlet (601) of hot-blast stove (6)；Second pipe (L2) is the branch that the 4th pipeline (L4) separates.
3. flue gas purification device according to claim 1 or 2, it is characterised in that: the secondary absorption tower (2) is arranged one
The side of grade adsorption tower (1)；The top of primary adsorption tower (1) is equipped with primary adsorption tower active carbon entrance (103), primary adsorption tower
(1) bottom is equipped with primary adsorption tower active carbon outlet (104)；The top of secondary absorption tower (2) is equipped with secondary absorption tower activity
The bottom of charcoal entrance (203), secondary absorption tower (2) is equipped with secondary absorption tower active carbon outlet (204)；The top of Analytic Tower (3)
Equipped with Analytic Tower active carbon entrance (301), the bottom of Analytic Tower (3) is equipped with Analytic Tower active carbon outlet (302)；
Wherein, primary adsorption tower active carbon outlet (104) is connect with Analytic Tower active carbon entrance (301), and Analytic Tower active carbon goes out
Mouth (302) is connect with secondary absorption tower active carbon entrance (203), and secondary absorption tower active carbon exports (204) and primary adsorption tower
Active carbon entrance (103) connection.
4. flue gas purification device according to claim 3, it is characterised in that: the secondary absorption tower (2) is specifically located at
The right side of primary adsorption tower (1).
5. flue gas purification device according to claim 1 or 2, it is characterised in that: the secondary absorption tower (2) is arranged one
The top of grade adsorption tower (1)；The top of secondary absorption tower (2) is equipped with secondary absorption tower active carbon entrance (203)；Primary adsorption tower
(1) bottom is equipped with primary adsorption tower active carbon outlet (104)；The top of Analytic Tower (3) is equipped with Analytic Tower active carbon entrance
(301), the bottom of Analytic Tower (3) is equipped with Analytic Tower active carbon outlet (302)；
Wherein, primary adsorption tower active carbon outlet (104) is connect with Analytic Tower active carbon entrance (301), and Analytic Tower active carbon goes out
Mouth (302) is connect with secondary absorption tower active carbon entrance (203).
6. flue gas purification device according to claim 2 or 4, it is characterised in that: hot-blast stove is additionally provided with wind-supplying mouth on (6)
(603)。
7. flue gas purification device according to claim 3, it is characterised in that: hot-blast stove is additionally provided with wind-supplying mouth on (6)
(603)。
8. flue gas purification device according to claim 5, it is characterised in that: hot-blast stove is additionally provided with wind-supplying mouth on (6)
(603)。
9. flue gas purification device according to claim 3, it is characterised in that: the device further includes the first conveyer (7), is used
Analytic Tower active carbon entrance (301) is delivered in active carbon to be regenerated is exported (104) from primary adsorption tower active carbon；The device
It further include second conveyor (8), for by regenerated carbon, analytically tower active carbon outlet (302) to be delivered to the work of secondary absorption tower
Property charcoal entrance (203)；The device further includes third conveyer (9), for the active carbon after denitration is active from secondary absorption tower
Charcoal outlet (204) is delivered to primary adsorption tower active carbon entrance (103).
10. flue gas purification device according to claim 6, it is characterised in that: the device further includes the first conveyer (7),
For active carbon to be regenerated to be delivered to Analytic Tower active carbon entrance (301) from primary adsorption tower active carbon outlet (104)；The dress
Setting further includes second conveyor (8), for by regenerated carbon, analytically tower active carbon outlet (302) to be delivered to secondary absorption tower
Active carbon entrance (203)；The device further includes third conveyer (9), for the active carbon after denitration is living from secondary absorption tower
Property charcoal outlet (204) be delivered to primary adsorption tower active carbon entrance (103).
11. flue gas purification device according to claim 5, it is characterised in that: the device further includes the first conveyer (7),
For active carbon to be regenerated to be delivered to Analytic Tower active carbon entrance (301) from primary adsorption tower active carbon outlet (104)；The dress
Setting further includes second conveyor (8), for by regenerated carbon, analytically tower active carbon outlet (302) to be delivered to secondary absorption tower
Active carbon entrance (203).
12. flue gas purification device according to claim 6, it is characterised in that: the device further includes the first conveyer (7),
For active carbon to be regenerated to be delivered to Analytic Tower active carbon entrance (301) from primary adsorption tower active carbon outlet (104)；The dress
Setting further includes second conveyor (8), for by regenerated carbon, analytically tower active carbon outlet (302) to be delivered to secondary absorption tower
Active carbon entrance (203).
13. according to claim 1,2,4, flue gas purification device described in any one of 7-12, it is characterised in that: the device also wraps
Include cooling blower (10)；The lower part of the cooling section (5) of Analytic Tower (3) is equipped with cooling section gas access (501), cooling section (5)
Top is equipped with cooling section gas vent (502)；The air outlet of cooling blower (10) is connected to cooling section via the 5th pipeline (L5)
Gas access (501).
14. flue gas purification device according to claim 3, it is characterised in that: the device further includes cooling blower (10)；Solution
The lower part for analysing the cooling section (5) of tower (3) is equipped with cooling section gas access (501), and the top of cooling section (5) is equipped with cooling section gas
It exports (502)；The air outlet of cooling blower (10) is connected to cooling section gas access (501) via the 5th pipeline (L5).
15. flue gas purification device according to claim 5, it is characterised in that: the device further includes cooling blower (10)；Solution
The lower part for analysing the cooling section (5) of tower (3) is equipped with cooling section gas access (501), and the top of cooling section (5) is equipped with cooling section gas
It exports (502)；The air outlet of cooling blower (10) is connected to cooling section gas access (501) via the 5th pipeline (L5).
16. flue gas purification device according to claim 6, it is characterised in that: the device further includes cooling blower (10)；Solution
The lower part for analysing the cooling section (5) of tower (3) is equipped with cooling section gas access (501), and the top of cooling section (5) is equipped with cooling section gas
It exports (502)；The air outlet of cooling blower (10) is connected to cooling section gas access (501) via the 5th pipeline (L5).
17. flue gas purification device according to claim 5, it is characterised in that: set at the smoke inlet of secondary absorption tower (2)
There is ammonia jetting device, and the setting of ammonia jetting device is at second pipe (L2) and secondary absorption tower (2) link position
Trip.
18. flue gas purification device according to claim 6, it is characterised in that: set at the smoke inlet of secondary absorption tower (2)
There is ammonia jetting device, and the setting of ammonia jetting device is at second pipe (L2) and secondary absorption tower (2) link position
Trip.
19. the flue gas purification device according to any one of claim 7-12, it is characterised in that: secondary absorption tower (2)
Ammonia jetting device is equipped at smoke inlet, and ammonia jetting device is arranged in second pipe (L2) and secondary absorption tower (2)
The downstream of link position.
20. flue gas purification device according to claim 13, it is characterised in that: at the smoke inlet of secondary absorption tower (2)
Equipped with ammonia jetting device, and the setting of ammonia jetting device is in second pipe (L2) and secondary absorption tower (2) link position
Downstream.
21. according to claim 1,2,4, flue gas purification device described in any one of 7-12,14-18, it is characterised in that: the dress
Setting further includes chimney (11)；Secondary absorption tower flue gas exports (202) and is connected to chimney (11) via the 6th pipeline (L6).
22. flue gas purification device according to claim 3, it is characterised in that: the device further includes chimney (11)；Second level is inhaled
Attached tower flue gas outlet (202) is connected to chimney (11) via the 6th pipeline (L6).
23. flue gas purification device according to claim 5, it is characterised in that: the device further includes chimney (11)；Second level is inhaled
Attached tower flue gas outlet (202) is connected to chimney (11) via the 6th pipeline (L6).
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| CN112044267A (en) * | 2019-06-05 | 2020-12-08 | 中冶长天国际工程有限责任公司 | Method and system for utilizing heat energy of net flue gas in flue gas treatment |
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| CN112169581B (en) * | 2019-07-04 | 2023-03-17 | 中冶长天国际工程有限责任公司 | Flue gas treatment method and system for on-line regeneration of SCR (Selective catalytic reduction) catalyst |
| CN112295385A (en) * | 2019-07-30 | 2021-02-02 | 中冶长天国际工程有限责任公司 | Tail gas purification and waste heat utilization method and device of hot blast stove for active carbon desorption |
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| CN112403189B (en) * | 2020-02-28 | 2022-05-03 | 中冶长天国际工程有限责任公司 | Flue gas desulfurization and denitrification activated carbon distribution system and distribution method |
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