CN103418234A - Waste gas processing system and using method thereof - Google Patents
Waste gas processing system and using method thereof Download PDFInfo
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- CN103418234A CN103418234A CN201310004257XA CN201310004257A CN103418234A CN 103418234 A CN103418234 A CN 103418234A CN 201310004257X A CN201310004257X A CN 201310004257XA CN 201310004257 A CN201310004257 A CN 201310004257A CN 103418234 A CN103418234 A CN 103418234A
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Abstract
The invention provides a waste gas processing system and a using method thereof. The waste gas processing system comprises circulating fluidized bed semi-dry scrubber equipment and an inert material positioned in the former. The waste gas processing system adopts a design that the inert material is contained, when the waste gas processing system is used, the inert material and an alkaline agent form a fluidized dioxin-removed component and the problem that the alkaline agent is adhered on the inner wall of a reactor when a GSA (gas suspension absorber) is used for processing the waste gas is solved, the practical operation possibility of taking the GSA and the alkaline agent together for removing acidic gas is improved; moreover, tests show that the processing system can utilize the fluidized dioxin-removed component to achieve the purpose of effectively processing the gas phase dioxin in the waste gas.
Description
Technical field
The present invention relates to a kind of exhaust treatment system, relate in particular to the system of gas phase dioxin in a kind of high efficiency processing waste gas.The present invention is also relevant for the method for using exhaust treatment system.
Background technology
The poison that the dioxin of no color or smell is century, it results from the waste gas that burning causes, and dioxin is present in animal or vegetables and fruits, enter human body via food chain again and be absorbed by the body, just causing the diseases such as many livers, immune system, muscle arthralgia, miscarriage, deformity youngster, visual impairment, is one of problem attracted most attention now therefore process dioxin.
Contain sour gas and dioxin poisonous gas in the waste gas of incinerator or the generation of other combustion systems, generally can use the alkaline agent absorption tower to remove sour gas, and adsorb dioxin with activated carbon, then remove shot-like particle and be adsorbed the activated carbon of pollutant by bag collector (bag filter).
The general pattern of using in alkaline agent absorption tower has dry type or half dry type absorption tower, and gas suspension absorption plant (gas suspension absorber, GSA) be a kind of for the half dry type absorption tower, it comprises a reactor (reactor), an accumulator tank (storage) and a cyclone (cyclone), and use therein alkaline agent is to be calcium hydroxide (Ca (OH)
2), the use flow process of GSA is that alkaline agent is by alkaline agent accumulator tank injecting reactor, alkaline agent reacts with sour gas in reactor, reach the purpose of removing sour gas, now alkaline agent in reactor can according to little, in, the particle diameter such as large presents respectively " with air current flow ", " fluidisation " reaches three kinds of states such as " dropping ".Part can be collected by cyclone with the small particle diameter alkaline agent of air current flow, and get back in the alkaline agent accumulator tank and reuse, and part can be discharged from the gas suspension absorption plant with the small particle diameter alkaline agent of air current flow.Fluidised middle particle diameter alkaline agent can't maintain fluidisation for a long time, because of it, naturally falls after can be agglomerated into the bulky grain footpath with other shot-like particle or alkaline agent, and the large particle diameter dropped is by the pipeline discharge of reactor below.
The waste gas of removing acid gas by the GSA system enters activated carbon flow in pipes (active carbon injector subsequently, ACI), remove the gaseous state dioxin in waste gas, waste gas bag collector (bag filter, the BF) system of flowing through is again removed the shot-like particle in waste gas and is adsorbed the activated carbon of pollutant.
This GSA has developed nearly many decades, process the system of dioxin in waste gas compared to other, it has advantages of that device is simple and equipment is cheap, precisely because maximum shortcoming is in the situation that practical operation, during the alkaline agent injecting reactor, alkaline agent easily sticks on the tube wall of reactor, cause the tube wall internal diameter of reactor to diminish, and cause the increase of GSA voltage loss, therefore this GSA and ACI system need to shut down at set intervals, stick the alkaline agent on the tube wall of reactor with removing, and because alkaline agent easily sticks, therefore cause the unsettled problem of alkaline agent granulation in reactor, , alkaline agent small particle diameter alkaline agent with air current flow in reactor can significantly reduce, and then affect the efficiency that alkaline agent is removed acid gas.In addition, the gas phase dioxin in dioxin was to use active carbon adsorption to remove in the past, therefore in the ACI system, need use a large amount of activated carbon to remove the gas phase dioxin.In addition, because activated carbon injects the activated carbon pipeline, be with the current stabilization mode pipeline of flowing through, therefore the efficiency of the dioxin in active carbon adsorption waste gas is not good, even if therefore use the activated carbon of excess also can't effectively remove the dioxin of gaseous state in waste gas, and increase on foot the Cost Problems of activated carbon.
Summary of the invention
In order to make the more extensive and more efficient removal sour gas that is used in of GSA and ACI system, process the dioxin in waste gas, especially the dioxin of gaseous state simultaneously.The object of the present invention is to provide a kind of exhaust treatment system that can be used for, it has the deacidification efficiency that stability is high, effectively removes dioxin simultaneously, and can reduce the exhaust treatment system of activated carbon use amount simultaneously.
A kind of exhaust treatment system of the present invention, it comprises:
One circulation of fluid bed half dry type deacidification device (circulating fluidized bed semi-dry scrubber equipment), it comprises a reactor, one dust-collecting equipment be connected with this reactor, a recycling storage groove be connected with this reactor and this dust-collecting equipment and an alkaline agent injection device be connected with this reactor, this reactor can be for input one waste gas, and this alkaline agent injection device can be for the input alkaline agent;
One inert substance, it is to be placed in this recycling storage groove.
According to the present invention, inert substance of the present invention refers to any material do not reacted with alkaline agent.
According to the present invention, the density of inert substance of the present invention is such as but not limited between 1.5 to 2.8 g/cms.Better, the density of described inert substance is such as but not limited between 2.5 to 2.6 g/cms.
According to the present invention, the particle diameter of inert substance of the present invention such as but not limited between 0.01 millimeter (mm) between 5mm.
According to the present invention, dust-collecting equipment of the present invention refers to that an air-flow that contains gas, inert substance and alkaline agent is by after this dust-collecting equipment, can make inert substance and alkaline agent equipment separated from the gas in air-flow, it is such as, but not limited to gravity type dust arrester, inertia-type dust arrester or cyclone.
According to the present invention, inertia-type dust arrester of the present invention is such as but not limited to bent tube type inertia-type dust arrester, flap type inertia-type dust arrester or multilayer shelves version type inertia-type dust arrester.Preferably, wherein this waste gas contains the gas phase dioxin.
Preferably, wherein this alkaline agent is to be selected from following formed group: calcium hydroxide, magnesium hydroxide, calcium carbonate with and etc. combination.
Preferably, wherein this inert substance is to be particulate matter.
Preferably, wherein this particulate matter is to be ore in sand form.
Preferably, wherein this ore in sand form is to be selected from following formed group: iron sand, quartz sand with and etc. combination.
According to the present invention, the main component of quartz sand of the present invention is to be silicate, and described silicate is such as but not limited to calcium silicates etc.
Preferably, wherein this ore in sand form is to be quartz sand.
Preferably, wherein the particle diameter of this inert substance is between between 0.01mm to 5mm.Better, the particle diameter of this inert substance is between 0.15mm between 0.05 millimeter (mm).
Preferably, wherein this dust-collecting equipment is to be selected from following formed group: gravity type dust arrester, inertia-type dust arrester and cyclone.
Better, wherein this dust-collecting equipment is to be cyclone.
Preferably, its also comprise one with the activated carbon adsorption unit of this dust-collecting equipment, this activated carbon adsorption unit comprises a carrier pipe be connected with this dust-collecting equipment, an ascending pipe be connected with this carrier pipe and an activated carbon storehouse be connected with this ascending pipe, wherein this carrier pipe has an activated carbon inlet and at least one turbulence structure, this activated carbon inlet is between this dust-collecting equipment and this at least one turbulence structure, and the channel cross-sectional area that this part has a carrier pipe of this at least one turbulence structure is the channel cross-sectional area that is less than the carrier pipe of other parts.
Preferably, wherein this at least one turbulence structure be by the part this carrier pipe tube wall towards the passage projection of carrier pipe, formed.
Preferably, wherein this at least one turbulence structure is a projection, and this projection is the inwall of being located at carrier pipe.
Preferably, the ratio of internal diameter that wherein this part has a carrier pipe of the narrowest passage internal diameter of carrier pipe of this at least one turbulence structure and these other parts is between 0.5 to 0.8.
Preferably, it also comprises a bag collector be connected with this carrier pipe of this activated carbon adsorption unit, and wherein this at least one turbulence structure is between this activated carbon inlet and this bag collector.
According to the present invention, bag collector of the present invention is such as but not limited to mechanical shock formula bag collector, air back-washing type bag collector or pulsed bag collector.
The present invention also provides a kind of method of using exhaust treatment system, and it comprises the following steps:
Complete aforesaid exhaust treatment system;
Pass into the constituent of a removal dioxin in this reactor, the constituent of this removal dioxin is to comprise this inert substance and this alkaline agent, and the constituent of this removal dioxin is to be circulated in this circulation of fluid bed half dry type deacidification device;
Input a waste gas in this reactor, this waste gas is mixed in this reactor, to remove the dioxin in waste gas with the constituent of this removal dioxin.
According to the present invention, the constituent of removal dioxin of the present invention is formed via collision by alkaline agent and inert substance in reactor, and it includes but not limited to: alkaline agent particle, inert substance particle and alkalescence stick in the particle on inert substance surface.
Preferably, wherein should pass into the constituent of a removal dioxin in this reactor, and also comprise and make an inert substance circulate in this reactor, this recycling storage groove and this dust-collecting equipment;
Make an alkaline agent by alkaline agent injection device input reactor, with this inert substance, mix to form the constituent of this removal dioxin.
According to the present invention, the method for use exhaust treatment system of the present invention can utilize the addition of inert substance to adjust the crushing of two devices of this circulation of fluid bed half dry type deacidification device and this activated carbon adsorption unit.
According to the present invention, the method of use exhaust treatment system of the present invention can be utilized the parameters such as density of the crushing of two devices adjusting this circulation of fluid bed half dry type deacidification device and this activated carbon adsorption unit, the wind speed of adjusting reactor, the particle size of adjusting inert substance and adjustment inert substance, makes this inert substance circulate in this reactor, this recycling storage groove and this dust-collecting equipment.
According to the present invention, this waste gas mixes with the constituent of this removal dioxin in this reactor, to remove the dioxin in waste gas, this constituent of removing the waste gas of dioxin and this removal dioxin is after dust-collecting equipment of the present invention, the waste gas of removing dioxin just can separate with the constituent of the removal dioxin of part miniature dimensions, and the constituent of the removal dioxin of this miniature dimensions just can enter in the recycling storage groove to continue and be circulated in this reactor, this recycling storage groove and this dust-collecting equipment.
According to the present invention, the addition of alkaline agent of the present invention is such as but not limited to 1 to 5 gram/cubic meter (g/m
3), better, such as but not limited to 1 to 3g/m
3.
Preferably, wherein the crushing of two devices of this circulation of fluid bed half dry type deacidification device and this activated carbon adsorption unit is to maintain between 160 to 320 millimeters of water (mmAq), the wind speed of this reactor is between 6 to 10 meter per seconds, and the time that waste gas is detained at reactor is between 1 second to 3 seconds.
Better, the wind speed of this reactor is between 6 to 10 meter per seconds, and the particle diameter of this inert substance is between 0.02 to 5mm.Better, the wind speed of this reactor is 7 to 9 meter per seconds, and the particle diameter of this inert substance is between 0.05 to 0.15mm.
The invention has the advantages that, be used in the design that is equipped with inert substance in the recycling storage groove, make exhaust treatment system of the present invention in use, this inert substance and the alkaline agent provided by the alkaline agent injection device form the constituent of a fluidised removal dioxin, make the alkaline agent in the constituent of this removal dioxin be difficult for sticking the inwall in reactor in reactor, and then make the constituent of removal dioxin of the present invention easily be circulated in this reactor, in recycling storage groove and dust-collecting equipment, and then the collision probability of increase and waste gas, and significantly improve the efficiency of removing dioxin in waste gas, espespecially significantly improve the efficiency of removing the gas phase dioxin, therefore follow-up when using activated carbon adsorption unit to continue processing waste gas, just can significantly reduce the use amount of activated carbon, and then significantly reduce costs, and this removes the constituent of dioxin, inert substance particle espespecially, therefore in this circulation of fluid bed half dry type deacidification device because with alkaline agent, not reacting and be difficult for being cracked into tiny powder, and then capable of circulationly in fluidized bed half dry type deacidification device, continue to be used, also can respond the environmental protection concept and reduce costs.The present invention is used in the design that is equipped with inert substance in the recycling storage groove, make exhaust treatment system of the present invention in use, this inert substance and the alkaline agent provided by the alkaline agent injection device form the constituent of a fluidised removal dioxin, solve GSA system applies alkaline agent when processing waste gas for a long time and sticked the problem in reactor wall, can significantly reduce the frequency that single unit system shuts down, and improve the GSA system applies in the possibility of exhaust-gas treatment Practical Operation, and the constituent of removal dioxin also has the effect of processing gas phase dioxin in waste gas.Exhaust treatment system of the present invention is in processing waste gas the time, to use the cheap advantage of GSA system cost, and alkaline agent sticks the disadvantage in reactor wall when having improved it and using, therefore when processing waste gas, significantly reduce costs, and its efficiency of removing dioxin is good, espespecially remove the efficiency of gas phase dioxin.
In addition, the present invention utilizes the design of turbulence structure in activated carbon adsorption unit, the channel cross-sectional area that has the carrier pipe of turbulence structure because of this part is the channel cross-sectional area that is less than the carrier pipe of other parts, therefore when waste gas and activated carbon process turbulence structure, the probability of both collisions increases, just increased the efficiency of gas phase dioxin in active carbon adsorption waste gas, made activated carbon bring into play maximum effectiveness, and the efficiency that makes to process gas phase dioxin in waste gas significantly improves.
Further, the present invention utilizes the design that also comprises bag collector in exhaust treatment system, uses the solid phase dioxin of removing in waste gas, and then makes the waste gas after final the processing, and its dioxin total concentration is far below 0.1ngI-TEQ/Nm
3.
Below in conjunction with the drawings and specific embodiments, describe the present invention, but not as a limitation of the invention.
The accompanying drawing explanation
The schematic diagram that Fig. 1 is a preferred embodiment of the present invention;
The schematic diagram that Fig. 2 is another preferred embodiment of the present invention;
The schematic diagram that Fig. 3 is use state of the present invention;
The schematic diagram that Fig. 4 is another preferred embodiment of the present invention.
Wherein, Reference numeral
1 exhaust treatment system
10 circulation of fluid bed half dry type deacidification devices
11 reactors
12 dust-collecting equipment 13 recycling storage grooves
14 alkaline agent injection devices
20 inert substances
30 activated carbon adsorption unit 31 carrier pipes
311 activated carbon inlets
312 turbulence structure 32 ascending pipes
33 activated carbon storehouse 40 bag collectors
50 conducting tube 60 boilers
70 lure air-introduced machine 80 chimneys
P1 sampled point P2 sampled point
The P3 sampled point
The specific embodiment
For understanding in detail technical characterictic of the present invention and practical effect, and can implement according to the content of specification, refer to preferred embodiment, the technological means of being used in order to reach the goal to set forth the present invention.
Exhaust treatment system of the present invention
Embodiment 1
Refer to shown in Fig. 1, the exhaust treatment system 1 of the present embodiment comprises a circulation of fluid bed half dry type deacidification device 10 (circulating fluidized bed semi-dry scrubber equipment), an inert substance 20, an activated carbon adsorption unit (active carbon absorber equipment, ACAE) 30 and one bag collector 40.
Aforesaid circulation of fluid bed half dry type deacidification device 10 comprises a reactor 11, the one collection equipment dirt be connected with this reactor 11 12, a recycling storage groove 13 be connected with this reactor 11 and this dust-collecting equipment 12 and an alkaline agent injection device 14 be connected with this reactor 11, this reactor 11 can be for input one waste gas, this alkaline agent injection device 14 can be for input one alkaline agent, in the present embodiment, this dust-collecting equipment 12 is a cyclone.
Aforesaid inert substance 20, it is to be placed in this recycling storage groove 13, and should be for particle diameter between 0.2 millimeter (mm) to the quartz sand between 3mm.
Aforesaid activated carbon adsorption unit 30, it is to be connected with the dust-collecting equipment 12 of this circulation of fluid bed half dry type deacidification device 10, it comprises a carrier pipe 31 be connected with this dust-collecting equipment 12, one ascending pipe 32 be connected with this carrier pipe 31 and an activated carbon storehouse 33 be connected with this ascending pipe 32, this carrier pipe 31 has two ends, one activated carbon inlet 311 and two turbulence structures 312, a wherein end of carrier pipe 31 is to be connected with this dust-collecting equipment 12, this activated carbon inlet 311 is interfaces that this carrier pipe 31 is connected with this ascending pipe 32, and this activated carbon inlet 311 is between this dust-collecting equipment 12 and this two turbulence structures 312, these two turbulence structures 312 be by the part this carrier pipe 31 tube wall towards the passage projection of carrier pipe 31, form, and between these two turbulence structures 312 at a distance of a distance, wherein to have the wherein channel cross-sectional area of the carrier pipe 31 of a turbulence structure 312 are the channel cross-sectional areas that are less than the carrier pipe 31 of other parts to this part, and the ratio of internal diameter that this this part has the carrier pipe 31 of the narrowest passage internal diameter of the carrier pipe 31 of a turbulence structure 312 wherein and these other parts is to be 0.7.
Embodiment 2
Refer to shown in Fig. 2, the exhaust treatment system difference from Example 1 of the present embodiment is, these carrier pipe 31 inwalls are provided with a plurality of turbulence structures 312, those turbulence structures 312 are to be projection, and the channel cross-sectional area that this part has a carrier pipe 31 of projection is the channel cross-sectional area that is less than the carrier pipe 31 of these other parts.
Embodiment 3
The exhaust treatment system difference from Example 1 of the present embodiment is, wherein this dust-collecting equipment 12 is to be a flap type inertia-type dust arrester.
The application of exhaust treatment system of the present invention
Refer to shown in Fig. 3, the exhaust treatment system 1 of embodiments of the invention 1 is during for an incinerator, this circulation of fluid bed half dry type deacidification device 10 is to utilize a conducting tube 50 to be connected with a boiler 60, one to lure air-introduced machine 70 be to be connected with this bag collector 40, and a chimney 80 is to lure air-introduced machine 70 to be connected with this.
The method of use exhaust treatment system of the present invention
Embodiment 1
Refer to shown in Fig. 4, the complete aforesaid incinerator that is equiped with exhaust treatment system 1 of the present invention, the quartz sand injection wind speed that will be positioned at recycling storage groove 13 is that 6 to 10 meter per seconds (m/s) and temperature are about 140 ° of reactors 11 between C to 180 ° of C, make quartz sand in this reactor 11, dust-collecting equipment 12 and the interior circulation of recycling storage groove 13, wherein the addition of quartz sand is for circulation of fluid bed half dry type deacidification device 10 in exhaust treatment system 1 of the present invention and the crushing of this activated carbon adsorption unit 30 are maintained between 160 to 330 millimeters of water (mmAq), by alkaline agent by alkaline agent injection device 14 input reactors 11, wherein this alkaline agent is to be calcium hydroxide, its moisture content is 20%, and its addition is to be 1 to 3 gram/cubic meter (g/m
3), quartz sand and this alkaline agent are mixed to form the constituent of a removal dioxin in reactor 11, then waste gas is discharged via conducting tube 50 by boiler 60, again in inflow reactor 11, now waste gas mixes in reactor 11 is interior with the constituent of this removal dioxin, the constituent of this removal dioxin and waste gas use in the interior collision of this reactor 11 dioxin of removing in waste gas, reach the effect of processing the acid gas such as hydrogen chloride and sulfide in waste gas and dioxin, the time that wherein waste gas is detained at reactor is between 1 second to 3 seconds.
In addition, the constituent of removing dioxin is collided with waste gas reactor 11 in, and makes the constituent of this removal dioxin include the alkaline agent particle, quartz sand particle of different size and alkalinely stick the particle in quartz sand surface.Wherein, the constituent of the removal dioxin of large molded dimension can be discharged via the bottom of reactor 11 because of gravity, the constituent of the removal dioxin of the medium size of part, quartz sand particle espespecially, can present fluidised phenomenon and in the circulation of fluid bed half dry type deacidification device 10 interior circulations of this exhaust treatment system 1, the constituent that the constituent of removal dioxin of the medium size of part continues with the removal dioxin of waste gas and other various sizes is collided and is polymerized to the constituent of the removal dioxin of large molded dimension, via the bottom of reactor 11, discharge again, after being collided, the constituent of the constituent of the removal dioxin of part medium size and the removal dioxin of waste gas and other various sizes can be fragmented into the constituent of the removal dioxin of miniature dimensions, and the constituent of the removal dioxin of the miniature dimensions of part, quartz sand particle espespecially, can present with the phenomenon of air current flow and collected and in the circulation of fluid bed half dry type deacidification device 10 interior circulations of this exhaust treatment system 1 by cyclone, and the constituent of the removal dioxin of the miniature dimensions of part, can be discharged in this circulation of fluid bed half dry type deacidification device 10 by dust-collecting equipment 12.
Process waste gas later via the constituent of removing dioxin and enter the carrier pipe 31 in activated carbon adsorption unit 30 via cyclone 12 again, it one is that the addition of as 50 to 200 milligrams/cubic metre is entered in carrier pipe 31 by activated carbon inlet 311 via ascending pipe 32 again that activated carbon in activated carbon storehouse 33 be take, wherein the wind speed in this carrier pipe 31 is to be 20 meter per seconds (m/sec), waste gas and activated carbon are just collided in carrier pipe 31, when both pass through the turbulence structure 312 of carrier pipe 31 interior settings, little than the channel cross-sectional area of other carrier pipe 31 by the channel cross-sectional area with carrier pipe 31 herein, both collision probability just increase, and then increase the effect of gas phase dioxin in active carbon adsorption waste gas.
Through the waste gas of the active carbon adsorption bag collector 40 of flowing through again, use the solid phase dioxin of removing in waste gas, finally by by luring air-introduced machine 70 to be discharged by chimney 80.
Embodiment 2 utilizes the method for the use exhaust treatment system of embodiment 1 to process discarded object 1
The source exhaust gas of the present embodiment is burning discarded object 1.
Refer to shown in Fig. 3, the present embodiment is in the interior sampled point that arranges of conducting tube 50, and it is numbered P1, in carrier pipe 31 and before turbulence structure 312, another sampled point is set, and it is numbered P2, in chimney 80 is interior another sampled point is set, and it is numbered P3.
The method of sampling of the present embodiment is, in those sample point, filter screen is set, gather solid phase sample in this filter screen place, and gather the gas phase sample after filter screen, the sample of the present embodiment is to sample according to NIEA A807.75C " dioxin and the furans method of sampling in discharge tube ", and detect according to A808.74B " dioxin and furans detection method in discharge tube ", the testing result of its dioxin is as shown in table 1 below.
Table 1 is processed the sample detecting result of discarded object 1
By table 1, learnt, the gas phase dioxin concentration of sampled point numbering P1 is 5.95
NgI-TEQ/Nm
3, solid phase dioxin concentration is 24.2ngI-TEQ/Nm
3, the total concentration of dioxin is 30.2ngI-TEQ/Nm
3.Sampled point numbering P2, processes waste gas later through the constituent of the circulation of fluid bed half dry type deacidification device 10 in exhaust treatment system 1 of the present invention and removal dioxin that is, and its gas phase dioxin concentration has been reduced to 0.127ngI-TEQ/Nm
3, and solid phase dioxin concentration has been reduced to 6.04ngI-TEQ/Nm
3, to learn thus, the constituent of removing dioxin has quite good removal effect to the gas phase dioxin in circulation of fluid bed half dry type deacidification device 10, and it removes efficiency up to 98%.Sampled point numbering P3, processes waste gas later through the activated carbon adsorption unit 30 in exhaust treatment system 1 of the present invention and this bag collector 40 that is, and its gas phase dioxin concentration has been reduced to 0.0256ngI-TEQ/Nm
3, and solid phase dioxin concentration has been reduced to 0.0158ngI-TEQ/Nm
3, final dioxin total concentration is 0.0414ngI-TEQ/Nm
3.Accordingly, the efficiency that exhaust treatment system 1 of the present invention is processed gas phase dioxin in waste gas is up to 99.5%, and the efficiency of removal gas phase dioxin and solid phase dioxin is also up to 99.5%.
Embodiment 3 utilizes the method for the exhaust treatment system of embodiment 1 to process discarded object 2
This is implemented sharp difference from Example 2 and is, the source exhaust gas of the present embodiment is to be discarded object 2, and the testing result of its dioxin is as shown in table 2 below.
Table 2 is processed the sample detecting result of discarded object 2
By table 2, learnt, the gas phase dioxin concentration of sampled point numbering P1 is 6.87
NgI-TEQ/Nm
3, solid phase dioxin concentration is 17.7ngI-TEQ/Nm
3, the total concentration of dioxin is 24.6ngI-TEQ/Nm
3.Sampled point numbering P2, processes waste gas later through the constituent of the circulation of fluid bed half dry type deacidification device 10 in exhaust treatment system 1 of the present invention and removal dioxin that is, and its gas phase dioxin concentration has been reduced to 0.360ngI-TEQ/Nm
3, and solid phase dioxin concentration has been reduced to 5.45ngI-TEQ/Nm
3, to learn thus, the constituent of removing dioxin has quite good removal effect to the gas phase dioxin in circulation of fluid bed half dry type deacidification device 10, and it removes efficiency up to 95%.Sampled point numbering P3, processes waste gas later through the activated carbon adsorption unit 30 in exhaust treatment system 1 of the present invention and this bag collector 40 that is, and its gas phase dioxin concentration has been reduced to 0.0350ngI-TEQ/Nm
3, and solid phase dioxin concentration has been reduced to 0.0184ngI-TEQ/Nm
3, final dioxin total concentration is 0.0533ngI-TEQ/Nm
3.Accordingly, the efficiency that exhaust treatment system 1 of the present invention is processed gas phase dioxin in waste gas is up to 99.5%, and the efficiency of removal gas phase dioxin and solid phase dioxin is also up to 99.5%.
Certainly; the present invention also can have other various embodiments; in the situation that do not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (25)
1. an exhaust treatment system, is characterized in that, comprising:
One circulation of fluid bed half dry type deacidification device, it comprises a reactor, one dust-collecting equipment be connected with this reactor, a recycling storage groove be connected with this reactor and this dust-collecting equipment and an alkaline agent injection device be connected with this reactor, this reactor can be for input one waste gas, and this alkaline agent injection device can be for the input alkaline agent;
One inert substance, it is placed in this recycling storage groove.
2. exhaust treatment system according to claim 1, is characterized in that, this waste gas contains the gas phase dioxin.
3. exhaust treatment system according to claim 1, is characterized in that, this alkaline agent is selected from following formed group: calcium hydroxide, magnesium hydroxide, calcium carbonate with and etc. combination.
4. exhaust treatment system according to claim 1, is characterized in that, this inert substance is particulate matter.
5. exhaust treatment system according to claim 4, is characterized in that, this particulate matter is ore in sand form.
6. exhaust treatment system according to claim 5, is characterized in that, this ore in sand form is selected from following formed group: iron sand, quartz sand with and etc. combination.
7. exhaust treatment system according to claim 5, is characterized in that, this ore in sand form is quartz sand.
8. according to the described exhaust treatment system of any one in claim 1 to 7, it is characterized in that, the particle diameter of this inert substance is between 0.01 millimeter to 5 millimeters mm.
9. exhaust treatment system according to claim 8, is characterized in that, this dust-collecting equipment is selected from following formed group: gravity type dust arrester, inertia-type dust arrester and cyclone.
10. exhaust treatment system according to claim 9, is characterized in that, this dust-collecting equipment is cyclone.
11. exhaust treatment system according to claim 1, it is characterized in that, also comprise an activated carbon adsorption unit be connected with this dust-collecting equipment, this activated carbon adsorption unit comprises a carrier pipe be connected with this dust-collecting equipment, one ascending pipe be connected with this carrier pipe and an activated carbon storehouse be connected with this ascending pipe, wherein this carrier pipe has an activated carbon inlet and at least one turbulence structure, this activated carbon inlet is between this dust-collecting equipment and this at least one turbulence structure, and the channel cross-sectional area that this part has a carrier pipe of this at least one turbulence structure is less than the channel cross-sectional area of the carrier pipe of other parts.
12. exhaust treatment system according to claim 11, is characterized in that, this at least one turbulence structure is formed towards the passage projection of carrier pipe by the tube wall of this carrier pipe of part.
13. exhaust treatment system according to claim 11, is characterized in that, this at least one turbulence structure is a projection, and this projection is located at the inwall of this carrier pipe.
14. according to claim 11 to the described exhaust treatment system of any one in 13, it is characterized in that, this part has the ratio of internal diameter of carrier pipe of the narrowest passage internal diameter of carrier pipe of this at least one turbulence structure and these other parts between 0.5 to 0.8.
15. exhaust treatment system according to claim 14, it is characterized in that, also comprise a bag collector be connected with this carrier pipe of this activated carbon adsorption unit, wherein this at least one turbulence structure is between this activated carbon inlet and this bag collector.
16. a method of using exhaust treatment system, is characterized in that, comprises the following steps:
Complete a kind of exhaust treatment system as described as any one in claim 1 to 10;
Pass into the constituent of a removal dioxin in this reactor, the constituent of this removal dioxin comprises this inert substance and this alkaline agent, and the constituent of this removal dioxin is circulated in this circulation of fluid bed half dry type deacidification device;
Input a waste gas in this reactor, this waste gas is mixed in this reactor, to remove the dioxin in waste gas with the constituent of this removal dioxin.
17. the method for use exhaust treatment system according to claim 16, it is characterized in that, should pass into the constituent of a removal dioxin in this reactor, and also comprise and make an inert substance circulate in this reactor, this dust-collecting equipment and this recycling storage groove;
Make an alkaline agent by alkaline agent injection device input reactor, with this inert substance, mix to form the constituent of this removal dioxin.
18. the method for use exhaust treatment system according to claim 17, it is characterized in that, in complete a kind of exhaust treatment system as claimed in any of claims 1 to 8 in one of claims, this exhaust treatment system also comprises an activated carbon adsorption unit be connected with this dust-collecting equipment, this activated carbon adsorption unit comprises a carrier pipe be connected with this dust-collecting equipment, one ascending pipe be connected with this carrier pipe and an activated carbon storehouse be connected with this ascending pipe, wherein this carrier pipe has an activated carbon inlet and at least one turbulence structure, this activated carbon inlet is between this dust-collecting equipment and this at least one turbulence structure, and the channel cross-sectional area that this part has a carrier pipe of this at least one turbulence structure is less than the channel cross-sectional area of the carrier pipe of other parts.
19. the method for use exhaust treatment system according to claim 18, is characterized in that, in this exhaust treatment system, this at least one turbulence structure is formed towards the passage projection of carrier pipe by the tube wall of this carrier pipe of part
20. the method for use exhaust treatment system according to claim 18, is characterized in that, in this exhaust treatment system, this at least one turbulence structure is a projection, and this projection is located at the inwall of this carrier pipe.
21. the method according to claim 18 to the described use exhaust treatment system of any one in 20, it is characterized in that, in this exhaust treatment system, this part has the ratio of internal diameter of carrier pipe of the narrowest passage internal diameter of carrier pipe of this at least one turbulence structure and these other parts between 0.5 to 0.8.
22. the method for use exhaust treatment system according to claim 21, it is characterized in that, this exhaust treatment system also comprises a bag collector be connected with this carrier pipe of this activated carbon adsorption unit, and wherein this at least one turbulence structure is between this activated carbon inlet and this bag collector.
23. the method according to claim 18 to the described use exhaust treatment system of any one in 20, it is characterized in that, the crushing of two devices of this circulation of fluid bed half dry type deacidification device and this activated carbon adsorption unit is to maintain between 160 to 320 millimeters of water, the wind speed of this reactor is between 6 to 10 meter per seconds, and the time that waste gas is detained at reactor is between 1 second to 3 seconds.
24. the method for use exhaust treatment system according to claim 21, it is characterized in that, the crushing of two devices of this circulation of fluid bed half dry type deacidification device and this activated carbon adsorption unit maintains between 160 to 320 millimeters of water, the wind speed of this reactor is between 6 to 10 meter per seconds, and the time that waste gas is detained at reactor is between 1 second to 3 seconds.
25. the method for use exhaust treatment system according to claim 22, it is characterized in that, the crushing of two devices of this circulation of fluid bed half dry type deacidification device and this activated carbon adsorption unit maintains between 160 to 320 millimeters of water, the wind speed of this reactor is between 6 to 10 meter per seconds, and the time that waste gas is detained at reactor is between 1 second to 3 seconds.
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| CN2012101561837A CN102716663A (en) | 2012-05-18 | 2012-05-18 | Exhaust gas treatment system and usage method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108554048A (en) * | 2018-01-08 | 2018-09-21 | 河北蓝纯环境科技有限公司 | The dry process technique and dry process equipment of exhaust gas containing sticky dust |
| CN109181786A (en) * | 2018-09-30 | 2019-01-11 | 胡自然 | A kind of coke oven gas desulfurization improved process |
| CN109999574A (en) * | 2019-02-21 | 2019-07-12 | 沈阳东大山汇环境科技有限公司 | A kind of thermopnore activated carbon adsorption method of denitration of low-sulfur flue gas |
| CN110732228A (en) * | 2019-11-11 | 2020-01-31 | 湘潭大学 | Flue gas desulfurization method and apparatus |
| CN114870581A (en) * | 2022-06-10 | 2022-08-09 | 上海环境卫生工程设计院有限公司 | Dry deacidification reactor and dry deacidification method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109173694B (en) * | 2018-09-28 | 2024-04-09 | 河南安彩高科股份有限公司 | Desulfurization reaction tube, desulfurization dust removal system based on desulfurization reaction tube and process of desulfurization dust removal system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TW201236744A (en) * | 2012-05-10 | 2012-09-16 | Super Max Engineering Entpr Co Ltd | Waste gas processing system and method of using the same |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108554048A (en) * | 2018-01-08 | 2018-09-21 | 河北蓝纯环境科技有限公司 | The dry process technique and dry process equipment of exhaust gas containing sticky dust |
| CN108554048B (en) * | 2018-01-08 | 2020-12-04 | 河北蓝纯环境科技有限公司 | Dry treatment process and dry treatment equipment for waste gas containing sticky dust |
| CN109181786A (en) * | 2018-09-30 | 2019-01-11 | 胡自然 | A kind of coke oven gas desulfurization improved process |
| CN109181786B (en) * | 2018-09-30 | 2020-11-24 | 安徽金森源环保工程有限公司 | Improved process for coke oven gas desulfurization |
| CN109999574A (en) * | 2019-02-21 | 2019-07-12 | 沈阳东大山汇环境科技有限公司 | A kind of thermopnore activated carbon adsorption method of denitration of low-sulfur flue gas |
| CN110732228A (en) * | 2019-11-11 | 2020-01-31 | 湘潭大学 | Flue gas desulfurization method and apparatus |
| CN110732228B (en) * | 2019-11-11 | 2022-02-15 | 湘潭大学 | Flue gas desulfurization method and apparatus |
| CN114870581A (en) * | 2022-06-10 | 2022-08-09 | 上海环境卫生工程设计院有限公司 | Dry deacidification reactor and dry deacidification method thereof |
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