CN214210042U - Device system for ammonia flue gas desulfurization - Google Patents
Device system for ammonia flue gas desulfurization Download PDFInfo
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- CN214210042U CN214210042U CN202022901491.0U CN202022901491U CN214210042U CN 214210042 U CN214210042 U CN 214210042U CN 202022901491 U CN202022901491 U CN 202022901491U CN 214210042 U CN214210042 U CN 214210042U
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Abstract
The utility model provides a device system for ammonia flue gas desulfurization, which comprises a desulfurizing tower, a flue gas supply device, an oxidizing gas supply device, a spray liquid storage tank, a washing liquid storage tank and an absorption slurry post-treatment device; the desulfurization tower comprises a slurry area, a first circulating area, a second circulating area, a third circulating area and a demisting area which are sequentially arranged from bottom to top along the axial direction; the gas-liquid separation tower plate arranged between the first circulation area and the second circulation area is connected with a spray liquid storage tank through a spray slurry return pipeline; the gas-liquid separation tower plates arranged in the second circulation area and the third circulation area are connected with a washing liquid storage tank through a washing liquid return pipeline. Device system is through the mode of a tower three-cycle, can reduce the quantity of thick liquid, and effectively reduces the formation of aerogel through the endless mode of step to can realize the continuous output of ammonium sulfate.
Description
Technical Field
The utility model belongs to the technical field of the environmental protection, a desulphurization unit system is related to, especially relate to an ammonia process flue gas desulfurization's device system.
Background
The ammonia flue gas desulfurization refers to a wet flue gas desulfurization process which takes amino substances as an absorbent to remove sulfur dioxide in flue gas and recover byproducts, the process can realize high-efficiency desulfurization and partial removal of nitrogen oxides in the flue gas, and the byproduct is ammonium sulfate, so that resource recycling can be realized, and the ammonia flue gas desulfurization method is the most effective and environment-friendly method for controlling acid rain and sulfur dioxide pollution.
The desulfurizing tower is the most key device in ammonia process flue gas desulfurization, and the rationality of absorption tower structure setting directly relates to desulfurization efficiency, desulfurizer utilization ratio and the height of sub-salt oxidation efficiency and device energy consumption. In the wet desulfurization process, a spray tower is often used because slurry contains a large amount of solid matter and is likely to form scale or deposit. The characteristics that spray the empty tower are that the system is difficult for scale deposit, the jam, and the flue gas pressure drop is little, but the flue gas temperature that gets into the desulfurizing tower is higher, and flue gas cooling and sulfur dioxide's absorption go on in the same region of desulfurizing tower, and on the one hand flue gas temperature is high to be unfavorable for the absorption of thick liquid to sulfur dioxide, and on the other hand circulation absorption thick liquid density is higher, and thick liquid viscosity is big, is unfavorable for gas-liquid mass transfer, in order to obtain ideal desulfurization efficiency, just must rely on increasing the liquid-gas ratio to realize, this operation consumption that has just greatly increased.
For wet ammonia desulfurization, the conventional desulfurization tower has the following problems: (1) in order to improve the sulfur dioxide removal rate, a larger liquid-gas ratio needs to be selected, so that the ammonia escape amount is increased; (2) the desulfurization efficiency is usually only 80-90%; (3) the flue gas is unevenly distributed, and the spraying slurry cannot be used for effectively absorbing sulfur dioxide; (4) the slurry has high density and is easy to cause scaling and blockage; (5) the slurry density is high, so that the intermediate product ammonium sulfite can not be effectively oxidized, and the obtained ammonium sulfate is wrapped by a desulfurizing agent, so that the quality of byproducts is influenced.
CN 111854452a discloses a one-machine two-tower ammonia desulfurization system, which comprises: a sintering machine; the two independent main shaft fans of the sintering machine are respectively connected with the sintering machine; the system comprises two sets of ammonia desulphurization systems, wherein each set of ammonia desulphurization system comprises a desulphurization heat exchanger and an absorption tower communicated with the desulphurization heat exchanger; a chimney; the absorption towers in the two sets of ammonia desulphurization systems share one chimney; the two sets of ammonia desulfurization systems are connected in parallel between the sintering machine and the chimney through two main sintering machine exhaust fans to form two desulfurization channels. The one-machine double-tower ammonia desulfurization system is provided with two sets of ammonia desulfurization systems, the floor area is large, the single ammonia desulfurization system is not improved, only the two sets of ammonia desulfurization systems are combined, and the absorption rate of sulfur dioxide in the flue gas cannot be effectively improved.
CN 102000490A discloses a control method of aerosol in ammonia flue gas desulfurization and a main desulfurization tower, in particular to a method for controlling the aerosol in ammonia flue gas desulfurization and a main desulfurization tower, wherein flue gas is cooled to 90-100% of relative humidity and 60-80 ℃ through high-pressure water mist or pre-washing, the flue gas enters the main desulfurization tower, the production of aerosol particles in ammonia flue gas desulfurization is reduced by optimizing desulfurization operation conditions, and the formed aerosol particles are condensed and grown and are partially washed and removed by desulfurization liquid. Injecting proper amount of steam into the saturated flue gas after desulfurization and partial removal of aerosol particles, establishing a supersaturated water vapor environment where the secondary condensation of the aerosol particles grows at the top of the desulfurization main tower, and removing the condensed and grown aerosol particles by a high-efficiency demister. But also has the defect of large occupied area of equipment.
CN 105727723a discloses a three-cycle desulfurization method and a flue gas desulfurization tower or system for wet ammonia desulfurization, wherein the desulfurization method comprises a first slurry circulation reflux, a second slurry circulation loop and a third slurry circulation reflux; a first slurry circulation loop: performing circulating spraying treatment on the flue gas by using slurry with the mass concentration of 15-20% and the pH value of 4-5, wherein the temperature of the flue gas treated by the slurry is 50-60 ℃; a second slurry circulation loop: circularly spraying the flue gas by using slurry with the mass concentration of 10-15% and the pH value of 5-6; third slurry circulation loop: and circularly spraying the flue gas by using slurry with the mass concentration of 3-10%. The three-cycle desulfurization method of wet ammonia desulfurization can realize the staged absorption of flue gas, but has the problem of large using amount of spray liquid, and cannot realize the continuous output of the byproduct ammonium sulfate.
Therefore, it is necessary to provide a compact ammonia flue gas desulfurization system.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide an ammonia process flue gas desulfurization's device system, the device system can reduce the quantity of thick liquid through the mode of a tower microcirculation, and effectively reduces the formation of aerogel through the mode of step circulation to can realize the continuous output of ammonium sulfate.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides an ammonia flue gas desulfurization's device system, flue gas ammonia desulfurization's device system includes desulfurizing tower, flue gas feeding device, oxidizing gas feeding device, sprays liquid storage tank, washing liquid storage tank and absorbs thick liquids aftertreatment device.
The desulfurization tower comprises a slurry area, a first circulating area, a second circulating area, a third circulating area and a demisting area which are sequentially arranged from bottom to top along the axial direction; the gas-liquid separation tower plate arranged between the first circulation area and the second circulation area is connected with a spray liquid storage tank through a spray slurry return pipeline; the gas-liquid separation tower plates arranged in the second circulation area and the third circulation area are connected with a washing liquid storage tank through a washing liquid return pipeline.
The oxidizing gas supply device delivers oxidizing gas to the slurry zone; and a slurry outlet of the slurry area is connected with a slurry absorption post-treatment device.
The slurry in the slurry area is conveyed to a first circulation area through at least 1 circulation spraying pipeline; and the flue gas supply device leads the flue gas into the space between the slurry area and the circulating spraying pipeline.
The spray liquid storage tank is connected with the desulfurizing tower through at least 2 slurry spray pipelines, wherein at least 1 slurry spray pipeline is arranged in the first circulation area, and at least 1 alkali liquor spray pipeline is arranged in the second circulation area.
And the washing liquid storage tank is connected with a third circulation area of the desulfurizing tower through at least 1 washing liquid spraying pipeline.
Absorb thick liquid aftertreatment system for the conventional absorption thick liquid aftertreatment system in this field, including but not limited to conventional processing apparatus such as filter equipment, crystallization device, the suitable absorption thick liquid aftertreatment device can be selected as required to the skilled person in this field to obtain the (NH) that compound industry required4)2SO4And (5) producing the product.
Flue gas feeding device and oxidizing gas feeding device are the conventional gas feeding device in this field, as long as can realize the supply of flue gas and oxidizing gas's supply respectively can, the utility model discloses do not do too much to describe repeatedly.
The number of the circulating spraying pipelines is at least 1, for example, 1, 2, 3, 4, 5 or 6, but not limited to the enumerated values, and other unrecited values in the numerical range are also applicable; preferably at least 2.
When the quantity that sets up of circulation spraying pipeline is 2 at least, the axial direction interval that sets up for following the desulfurizing tower of mode, and 2 adjacent circulation spraying pipeline's interval distance can carry out reasonable setting according to the handling capacity of flue gas, the utility model discloses do not too much injecing.
The number of the slurry spraying pipelines is at least 2, for example, 2, 3, 4, 5 or 6, but not limited to the enumerated values, and other unrecited values in the numerical range are also applicable; preferably at least 3, wherein at least 1 slurry spraying pipeline is arranged in the first circulation area, and at least 2 slurry spraying pipelines are arranged in the second circulation area.
At least 1 slurry spraying pipeline arranged in the first circulation area is used for supplementing slurry in the slurry area; set up in the flue gas that at least 1 thick liquid in second circulation district sprays the pipeline and is used for further absorbing by the inflow in first circulation district to guarantee the absorption effect to sulfur oxide in the flue gas, the thick liquid circulation in the second circulation district flows in addition, has improved the utilization ratio of thick liquid.
When slurry spraying pipeline's quantity that sets up is 2 at least in first circulation district, the axial direction interval that sets up the mode for following the desulfurizing tower sets up, and 2 adjacent slurry spraying pipeline's interval distance can carry out reasonable setting according to the handling capacity of flue gas, the utility model discloses do not too much inject.
When the setting quantity of thick liquid spraying pipeline was 2 at least in the second circulation district, the axial direction interval setting of mode for following the desulfurizing tower set up, and 2 adjacent thick liquids spray the spacing distance of pipeline and can carry out reasonable setting according to the handling capacity of flue gas, the utility model discloses do not too much injectedly.
The cleaning solution spraying pipelines of the utility model are arranged in at least 1 number, for example, 1, 2, 3, 4, 5 or 6, but not limited to the enumerated values, and other unrecited values in the numerical range are also applicable; preferably at least 2.
When the washing liquid sprayed the pipeline set up quantity for 2 at least, the axial direction interval that sets up for following the desulfurizing tower of mode, 2 adjacent washing liquids sprayed the interval distance of pipeline and can carry out reasonable setting according to the handling capacity of flue gas, the utility model discloses do not too much injecing.
The utility model divides the desulfurizing tower into a first circulation area, a second circulation area and a third circulation area, thereby realizing one-tower three-circulation, reducing the temperature of the treated flue gas in steps and avoiding the generation of excessive aerogel; and through the circulation of the spraying liquid, the utilization rate of the spraying liquid is improved, the consumption of the spraying liquid is reduced, the ammonium sulfate product can be continuously produced, and the economic benefit of the ammonia flue gas desulfurization is improved.
Preferably, the device system for ammonia flue gas desulfurization further comprises a microbubble generator.
The oxidizing gas supply device delivers the oxidizing gas to the slurry zone through the microbubble generator.
The utility model discloses a setting up of microbubble generator can make the slurry district of oxidizing gas in the desulfurizing tower, first circulation district, second circulation district and third circulation district evenly distributed to reduce the formation volume of ammonium sulfite in the ammonia process flue gas desulfurization processing procedure, and then guarantee the quality of accessory substance ammonium sulfate product.
Preferably, the gas-liquid separation trays comprise bubble cap trays and/or valve trays.
The gas-liquid separation tower plate arranged between the first circulation area and the second circulation area enables gas in the first circulation area to flow into the second circulation area, and slurry in the second circulation area flows back to the spray liquid storage tank through the spray slurry return pipeline; the gas-liquid separation tower plates arranged in the second circulation area and the third circulation area enable gas in the second circulation area to flow into the third circulation area, and liquid in the third circulation area flows back to the washing liquid storage tank through the washing liquid return pipeline.
Preferably, at least 2 layers of mechanical demisters are arranged in the demisting zone.
Preferably, the slurry spraying pipeline arranged in the first circulation zone is arranged between the circulation spraying pipeline and the second circulation zone.
Preferably, the device system for ammonia flue gas desulfurization further comprises a chimney;
and the top exhaust port of the desulfurizing tower is connected with a chimney.
Preferably, the device system for ammonia flue gas desulfurization further comprises a demisting device arranged between the desulfurization tower and the chimney connecting pipeline.
Preferably, the demister is a wet electrostatic demister.
The utility model discloses a wet-type electrostatic demister's setting realizes the further processing to desulfurizing tower exhaust gas, makes remaining acid composition can the desorption in the desulfurizing tower exhaust gas, and has effectively avoided appearing white fog to "disappear white" technological effect has been reached.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model divides the desulfurizing tower into a first circulation area, a second circulation area and a third circulation area, thereby realizing one-tower three-circulation, reducing the temperature of the treated flue gas in steps and avoiding the generation of excessive aerogel; through the circulation of the spraying liquid, the utilization rate of the spraying liquid is improved, the consumption of the spraying liquid is reduced, an ammonium sulfate product can be continuously produced, and the economic benefit of the ammonia flue gas desulfurization is improved;
(2) the utility model can evenly distribute the oxidizing gas in the slurry area, the first circulation area, the second circulation area and the third circulation area in the desulfurizing tower through the arrangement of the micro-bubble generator, thereby reducing the generation amount of ammonium sulfite in the ammonia flue gas desulfurization treatment process and further ensuring the quality of a byproduct ammonium sulfate product;
(3) the utility model can make the first circulation zone, the second circulation zone and the third circulation zone respectively and independently circulate through the arrangement of the gas-liquid separation tower plate, thereby ensuring the absorption effect of sulfur oxides in the flue gas;
(4) the utility model discloses a wet-type electrostatic demister's setting realizes the further processing to desulfurizing tower exhaust gas, makes remaining acid composition can the desorption in the desulfurizing tower exhaust gas, and has effectively avoided appearing white fog to "disappear white" technological effect has been reached.
Drawings
FIG. 1 is a schematic structural diagram of an ammonia flue gas desulfurization plant system provided in example 1;
fig. 2 is a schematic structural diagram of an ammonia flue gas desulfurization apparatus system provided in embodiment 2.
Wherein: 11, a flue gas supply device; 12, an oxidizing gas supply device; 2, a desulfurizing tower; 21, a first circulating spray pipeline; 22, a second circulating spraying pipeline; 23, gas-liquid separation tower plate; 24, a mechanical demister; 25, a microbubble generator; 3, storing a spraying liquid; 31, a first slurry spraying pipeline; 32, a second slurry spraying pipeline, 33, a third slurry spraying pipeline; 34, spraying a slurry return pipeline; 4, a washing liquid storage tank; 41, a first washing liquid spraying pipeline; 42, a second washing liquid spraying pipeline; 43, a washing liquid return line; 5, an absorption slurry post-treatment device; 6, a chimney; and 7, a wet electrostatic demister.
Detailed Description
It is to be understood that in the description of the present invention, the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
It should be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected" and "connected" in the description of the present invention are to be construed broadly, and may for example be fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Example 1
The embodiment provides an ammonia flue gas desulfurization device system as shown in fig. 1, and the device system comprises a desulfurization tower 2, a flue gas supply device 11, an oxidizing gas supply device 12, a spray liquid storage tank 3, a washing liquid storage tank 4 and an absorption slurry post-treatment device 5.
The desulfurization tower 2 comprises a slurry area, a first circulation area, a second circulation area, a third circulation area and a demisting area which are sequentially arranged from bottom to top along the axial direction; the gas-liquid separation tower plate 23 arranged between the first circulation area and the second circulation area is connected with the spray liquid storage tank 3 through a spray slurry return pipeline 34; the gas-liquid separation trays 23 provided in the second circulation zone and the third circulation zone are connected to a washing liquid storage tank through a washing liquid reflux line 43.
The oxidizing gas supply means 12 supplies an oxidizing gas to the slurry zone; and a slurry outlet of the slurry area is connected with a slurry absorption post-treatment device 5.
Slurry in the slurry area is conveyed to the first circulation area through a first circulation spraying pipeline 21 and a second circulation spraying pipeline 22; the flue gas supply device 11 leads the flue gas into the space between the slurry area and the circulating spraying pipeline. The first circulating spray pipeline 21 and the second circulating spray pipeline 22 are arranged at intervals along the axial direction of the desulfurizing tower 2.
The spray liquid storage tank 3 is connected with the desulfurizing tower 2 through 3 slurry spray pipelines, wherein a first slurry spray pipeline 31 is arranged in the first circulation area and used for supplementing slurry in the slurry area, and specifically, the first slurry spray pipeline 31 is arranged between the circulation spray pipeline and the second circulation area; the second slurry spraying pipeline 32 and the third slurry spraying pipeline 33 are arranged in the second circulation area and used for further absorbing the flue gas flowing from the first circulation area, so that the absorption effect of sulfur oxides in the flue gas is ensured, and the second slurry spraying pipeline 32 and the third slurry spraying pipeline 33 are arranged at intervals along the axial direction of the desulfurizing tower 2.
The washing liquid storage tank 4 is connected with the third circulation area of the desulfurization tower 2 through a first washing liquid spraying pipeline 41 and a second washing liquid spraying pipeline 42. The first washing liquid spraying pipeline 41 and the second washing liquid spraying pipeline 42 are arranged at intervals along the axial direction of the desulfurization tower 2.
The device system for ammonia flue gas desulfurization also comprises a microbubble generator 25; the oxidizing gas supply means 12 delivers the oxidizing gas to the slurry zone through the microbubble generator 25.
The gas-liquid separation tower plate 23 is a bubble cap tower plate; and 2 layers of mechanical demisters 24 are arranged in the demisting area, and the 2 layers of mechanical demisters 24 are arranged at intervals along the axial direction of the desulfurizing tower 2.
The device system for ammonia flue gas desulfurization further comprises a chimney 6, and a top exhaust port of the desulfurizing tower 2 is connected with the chimney 6.
In the embodiment, the desulfurizing tower 2 is divided into the first circulation area, the second circulation area and the third circulation area, so that one-tower three-circulation is realized, the temperature of the treated flue gas can be reduced in a gradient manner, and the generation of excessive aerogel is avoided; and through the circulation of the spraying liquid, the utilization rate of the spraying liquid is improved, the consumption of the spraying liquid is reduced, the removal rate of sulfur oxides in the flue gas can reach more than 96%, an ammonium sulfate product required by the composite industry can be continuously produced, and the economic benefit of ammonia flue gas desulfurization is improved.
Moreover, the arrangement of the micro-bubble generator 25 in this embodiment can uniformly distribute the oxidizing gas in the slurry zone, the first circulation zone, the second circulation zone and the third circulation zone of the desulfurization tower 2, thereby reducing the generation amount of ammonium sulfite in the ammonia flue gas desulfurization process, and further ensuring the quality of the byproduct ammonium sulfate product.
Example 2
The embodiment provides an ammonia flue gas desulfurization device system as shown in fig. 2, and the device system comprises a desulfurization tower 2, a flue gas supply device 11, an oxidizing gas supply device 12, a spray liquid storage tank 3, a washing liquid storage tank 4 and an absorption slurry post-treatment device 5.
The desulfurization tower 2 comprises a slurry area, a first circulation area, a second circulation area, a third circulation area and a demisting area which are sequentially arranged from bottom to top along the axial direction; the gas-liquid separation tower plate 23 arranged between the first circulation area and the second circulation area is connected with the spray liquid storage tank 3 through a spray slurry return pipeline 34; the gas-liquid separation trays 23 provided in the second circulation zone and the third circulation zone are connected to a washing liquid storage tank through a washing liquid reflux line 43.
The oxidizing gas supply means 12 supplies an oxidizing gas to the slurry zone; and a slurry outlet of the slurry area is connected with a slurry absorption post-treatment device 5.
Slurry in the slurry area is conveyed to the first circulation area through a first circulation spraying pipeline 21 and a second circulation spraying pipeline 22; the flue gas supply device 11 leads the flue gas into the space between the slurry area and the circulating spraying pipeline. The first circulating spray pipeline 21 and the second circulating spray pipeline 22 are arranged at intervals along the axial direction of the desulfurizing tower 2.
The spray liquid storage tank 3 is connected with the desulfurizing tower 2 through 3 slurry spray pipelines, wherein a first slurry spray pipeline 31 is arranged in the first circulation area and used for supplementing slurry in the slurry area, and specifically, the first slurry spray pipeline 31 is arranged between the circulation spray pipeline and the second circulation area; the second slurry spraying pipeline 32 and the third slurry spraying pipeline 33 are arranged in the second circulation area and used for further absorbing the flue gas flowing from the first circulation area, so that the absorption effect of sulfur oxides in the flue gas is ensured, and the second slurry spraying pipeline 32 and the third slurry spraying pipeline 33 are arranged at intervals along the axial direction of the desulfurizing tower 2.
The washing liquid storage tank 4 is connected with the third circulation area of the desulfurization tower 2 through a first washing liquid spraying pipeline 41 and a second washing liquid spraying pipeline 42. The first washing liquid spraying pipeline 41 and the second washing liquid spraying pipeline 42 are arranged at intervals along the axial direction of the desulfurization tower 2.
The device system for ammonia flue gas desulfurization also comprises a microbubble generator 25; the oxidizing gas supply means 12 delivers the oxidizing gas to the slurry zone through the microbubble generator 25.
The gas-liquid separation tower plate 23 is a float valve tower plate; and 2 layers of mechanical demisters 24 are arranged in the demisting area, and the 2 layers of mechanical demisters 24 are arranged at intervals along the axial direction of the desulfurizing tower 2.
The device system for ammonia flue gas desulfurization further comprises a chimney 6 and a demisting device, wherein a top exhaust port of the desulfurizing tower 2 is sequentially connected with the demisting device and the chimney 6, and the demisting device is a wet electrostatic demister 7.
And a top exhaust port of the desulfurizing tower 2 is connected with a chimney 6.
In the embodiment, the desulfurizing tower 2 is divided into the first circulation area, the second circulation area and the third circulation area, so that one-tower three-circulation is realized, the temperature of the treated flue gas can be reduced in a gradient manner, and the generation of excessive aerogel is avoided; and through the circulation of the spraying liquid, the utilization rate of the spraying liquid is improved, the consumption of the spraying liquid is reduced, the removal rate of sulfur oxides in the flue gas can reach more than 96%, an ammonium sulfate product required by the composite industry can be continuously produced, and the economic benefit of ammonia flue gas desulfurization is improved.
Moreover, the arrangement of the micro-bubble generator 25 in this embodiment can uniformly distribute the oxidizing gas in the slurry zone, the first circulation zone, the second circulation zone and the third circulation zone of the desulfurization tower 2, thereby reducing the generation amount of ammonium sulfite in the ammonia flue gas desulfurization process, and further ensuring the quality of the byproduct ammonium sulfate product.
Compared with the embodiment 1, the embodiment realizes the further treatment of the gas discharged from the desulfurizing tower 2 by the arrangement of the wet electrostatic demister 7, so that the residual acidic components in the gas discharged from the desulfurizing tower 2 can be removed, and the occurrence of white mist is effectively avoided, thereby achieving the technical effect of 'white elimination'.
In conclusion, the utility model divides the desulfurizing tower into a first circulation area, a second circulation area and a third circulation area, thereby realizing one-tower three-circulation, reducing the temperature of the treated flue gas in a gradient way and avoiding the generation of excessive aerogel; through the circulation of the spraying liquid, the utilization rate of the spraying liquid is improved, the consumption of the spraying liquid is reduced, an ammonium sulfate product can be continuously produced, and the economic benefit of the ammonia flue gas desulfurization is improved; the utility model can evenly distribute the oxidizing gas in the slurry area, the first circulation area, the second circulation area and the third circulation area in the desulfurizing tower through the arrangement of the micro-bubble generator, thereby reducing the generation amount of ammonium sulfite in the ammonia flue gas desulfurization treatment process and further ensuring the quality of a byproduct ammonium sulfate product; the utility model can make the first circulation zone, the second circulation zone and the third circulation zone respectively and independently circulate through the arrangement of the gas-liquid separation tower plate, thereby ensuring the absorption effect of sulfur oxides in the flue gas; the utility model discloses a wet-type electrostatic demister's setting realizes the further processing to desulfurizing tower exhaust gas, makes remaining acid composition can the desorption in the desulfurizing tower exhaust gas, and has effectively avoided appearing white fog to "disappear white" technological effect has been reached.
The applicant states that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.
Claims (10)
1. The device system for ammonia flue gas desulfurization is characterized by comprising a desulfurization tower, a flue gas supply device, an oxidizing gas supply device, a spray liquid storage tank, a washing liquid storage tank and an absorption slurry post-treatment device;
the desulfurization tower comprises a slurry area, a first circulating area, a second circulating area, a third circulating area and a demisting area which are sequentially arranged from bottom to top along the axial direction; the gas-liquid separation tower plate arranged between the first circulation area and the second circulation area is connected with a spray liquid storage tank through a spray slurry return pipeline; the gas-liquid separation tower plates arranged in the second circulation area and the third circulation area are connected with a washing liquid storage tank through a washing liquid return pipeline;
the oxidizing gas supply device delivers oxidizing gas to the slurry zone; a slurry outlet of the slurry area is connected with a slurry absorption post-treatment device;
the slurry in the slurry area is conveyed to a first circulation area through at least 1 circulation spraying pipeline; the flue gas supply device leads flue gas into the space between the slurry area and the circulating spraying pipeline;
the spray liquid storage tank is connected with the desulfurizing tower through at least 2 slurry spray pipelines, wherein at least 1 slurry spray pipeline is arranged in the first circulation area, and at least 1 alkali liquor spray pipeline is arranged in the second circulation area;
and the washing liquid storage tank is connected with a third circulation area of the desulfurizing tower through at least 1 washing liquid spraying pipeline.
2. The ammonia flue gas desulfurization plant system according to claim 1, further comprising a microbubble generator;
the oxidizing gas supply device delivers the oxidizing gas to the slurry zone through the microbubble generator.
3. The apparatus system for ammonia flue gas desulfurization of claim 1, wherein the gas-liquid separation trays comprise bubble cap trays and/or valve trays.
4. The device system for ammonia flue gas desulfurization of claim 1, wherein at least 2 layers of mechanical demisters are disposed in the demisting zone.
5. The device system for ammonia flue gas desulfurization according to claim 1, wherein the number of the circulating spray lines is at least 2.
6. The device system for ammonia flue gas desulfurization according to claim 1 or 5, wherein the number of the slurry spraying pipelines is at least 3, wherein at least 1 slurry spraying pipeline is arranged in the first circulation zone, and at least 2 alkali liquor spraying pipelines are arranged in the second circulation zone;
the slurry spraying pipeline arranged in the first circulation area is arranged between the circulation spraying pipeline and the second circulation area.
7. The device system for ammonia flue gas desulfurization of claim 6, wherein the number of the scrubbing liquid spraying pipelines is at least 2.
8. The ammonia flue gas desulfurization plant system according to claim 1 or 2, wherein the plant system further comprises a stack;
and the top exhaust port of the desulfurizing tower is connected with a chimney.
9. The device system for ammonia flue gas desulfurization of claim 8, further comprising a demister disposed between the desulfurization tower and the chimney connecting pipeline.
10. The device system for ammonia flue gas desulfurization of claim 9, wherein the demister is a wet electrostatic demister.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022901491.0U CN214210042U (en) | 2020-12-04 | 2020-12-04 | Device system for ammonia flue gas desulfurization |
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| CN202022901491.0U CN214210042U (en) | 2020-12-04 | 2020-12-04 | Device system for ammonia flue gas desulfurization |
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