CN218853959U - Semi-dry desulfurization ash resource utilization system - Google Patents
Semi-dry desulfurization ash resource utilization system Download PDFInfo
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- CN218853959U CN218853959U CN202222870516.4U CN202222870516U CN218853959U CN 218853959 U CN218853959 U CN 218853959U CN 202222870516 U CN202222870516 U CN 202222870516U CN 218853959 U CN218853959 U CN 218853959U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The utility model discloses a semidry process desulfurization ash utilization system belongs to desulfurization technical field, including absorption tower, dust remover and the distributor box that sets gradually, the distributor box links to each other with ash storehouse and desulfurization ash storage tank respectively, and desulfurization ash storage tank links to each other with the granulator, and the granulator still links to each other with mud storage storehouse and xylitol waste liquid storage tank. Conveying desulfurized ash formed after an absorbent reacts in an absorption tower to a desulfurized ash storage tank and then conveying the desulfurized ash to a granulator, conveying dyed sludge to the granulator through a conveying belt, conveying xylitol waste liquid to the granulator, mixing the desulfurized ash, the sludge and the xylitol waste liquid in the granulator, and preparing biomass particles; the biomass particles and coal are mixed according to a certain proportion and then are put into a furnace for combustion. The utility model discloses the maximize utilizes effective desulfurization composition calcium carbonate in the desulfurization ash, has avoided taking place because of the condition that desulfurization ash calcium carbonate content hangs down the interior desulfurization efficiency of influence stove, reduces the environmental protection cost, has solved the problem of dyeing sludge and xylitol waste liquid treatment difficulty simultaneously.
Description
Technical Field
The utility model relates to a desulfurization technical field, concretely relates to semidry process desulfurization ash utilization system.
Background
The circulating fluidized bed coal-fired power plant usually adopts tail semi-dry flue gas desulfurization and dust removal to purify flue gas, a part of desulfurized ash separated by the electric/cloth dust removal system enters the desulfurizing tower through the return chute to continue to participate in reaction, and the rest part is sent to the ash silo through the silo pump. The semi-dry desulfurization ash in the prior art can only be subjected to accumulation treatment because the semi-dry desulfurization ash has complex components, the difference of the components of the desulfurization ash generated by different desulfurization processes is large, the difference of the components of the desulfurization ash is caused by the instability of the operation of the same process, and the desulfurization ash is difficult to be utilized on a large scale due to the uncertainty and instability of the components and the proportion. In such a way, on one hand, about 10% of unreacted desulfurization absorbent in the desulfurization ash is wasted, and on the other hand, a large amount of desulfurization ash occupies a large amount of land, which causes the increase of desulfurization cost of a power plant.
Chinese patent No. CN205886588U, published as 2017.01.18, discloses a system for reusing semidry desulfurized ash for desulfurization, which comprises a fluidized bed boiler, a low-temperature electric dust removal system, a semidry desulfurization absorption tower, a dust remover, a desulfurized ash bin, an auger, a quicklime bin, a homogenizing bin, a conveying device and an ash bin, which are arranged in sequence along a flue gas flow, wherein an ash deposition outlet of the dust remover is connected with an inlet of a desulfurized ash three-way distributing valve, an outlet of the desulfurized ash three-way distributing valve is respectively connected with the semidry desulfurization absorption tower, the ash bin and the desulfurized ash bin through ash conveying pipelines, the desulfurized ash bin is connected with the homogenizing bin through the auger, the quicklime bin is also connected with the homogenizing bin, and the homogenizing bin is connected with the fluidized bed boiler through a pneumatic conveying device. However, the calcium carbonate content in the desulfurized fly ash is generally low, generally lower than 35%. The calcium carbonate content used for the desulphurization in the circulating fluidized bed boiler is more than 95 percent. The use of a large amount of desulfurized fly ash instead of limestone powder will affect the normal desulfurization efficiency in the furnace.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that a large amount of desulfurized fly ash used to replace limestone powder will affect the treatment difficulty of desulfurization efficiency and dyeing sludge and xylitol waste liquid in a normal furnace, and providing a semidry process desulfurized fly ash resource utilization system, wherein the desulfurized fly ash formed by the reaction of an absorbent through an absorption tower is conveyed to a desulfurized fly ash storage tank and then conveyed to a granulator, the dyeing sludge enters the granulator through a conveying belt, the xylitol waste liquid is conveyed into the granulator, and the desulfurized fly ash, the sludge and the xylitol waste liquid are mixed in the granulator and are made into biomass particles; the biomass particles and coal are mixed in proportion and are put into a furnace for combustion. The utility model discloses the maximize utilizes effective desulfurization composition calcium carbonate in the desulfurization ash, has avoided taking place because of the low condition that influences desulfurization efficiency in the stove of desulfurization ash calcium carbonate content, reduces the environmental protection cost, has solved the problem of dyeing sludge and xylitol waste liquid treatment difficulty simultaneously.
The utility model aims at realizing through the following technical scheme:
the utility model provides a semidry process desulfurization ash utilization system, is including absorption tower, dust remover and the distributor box that sets gradually, the distributor box links to each other with ash storehouse and desulfurization ash storage tank respectively, desulfurization ash storage tank links to each other with the granulator, the granulator still links to each other with sludge storage storehouse and xylitol waste liquid storage tank.
Preferably, the dust remover is also provided with a vent pipe.
Preferably, the emptying pipe is connected with a chimney.
Preferably, an induced draft fan is arranged on the emptying pipe.
Preferably, an auger is further arranged between the desulfurized fly ash storage tank and the granulator.
Preferably, a belt conveyor is arranged between the granulator and the sludge storage bin.
Preferably, the xylitol waste liquid storage tank is connected with the granulator through a waste liquid pipe.
Preferably, a waste liquid pump is arranged on the waste liquid pipe.
Preferably, the waste liquid pipe is further provided with a waste liquid flow meter and a waste liquid flow regulating valve.
The technical scheme has the following beneficial effects:
1. the utility model provides a semi-dry desulfurization ash resource utilization system, the desulfurization ash that the absorbent formed after absorption tower reaction is carried to desulfurization ash storage tank and is carried to the granulator afterwards, and dyeing sludge gets into the granulator through conveyor belt, and the xylitol waste liquid is carried to in the granulator, and desulfurization ash, mud, xylitol waste liquid mix in the granulator to make the living beings granule; the biomass particles and coal are mixed according to a certain proportion and then are put into a furnace for combustion. The utility model discloses the maximize utilizes effective desulfurization composition calcium carbonate in the desulfurization ash, has avoided taking place because of the condition that desulfurization ash calcium carbonate content hangs down the interior desulfurization efficiency of influence stove, reduces the environmental protection cost, has solved the problem of dyeing sludge and xylitol waste liquid treatment difficulty simultaneously.
2. The utility model provides a pair of semidry process desulfurization ash utilization system, auger can make the desulfurization ash carry to the granulator in, can control the conveying capacity of desulfurization ash again.
3. The utility model provides a pair of semi-dry desulfurization ash utilization system, dyeing sludge is direct to take out to take off partial moisture in the squeezer from dyeing wastewater pool end, and the mud after squeezing gets into the storage storehouse and passes through band conveyer and get into the granulator, and the speed control mud through control band conveyer gets into the conveying capacity of granulator.
4. The utility model provides a pair of semidry process desulfurization ash utilization system, the xylitol waste liquid pump is carried the volume of convenient adjustment waste liquid with setting up of waste liquid flow control valve and waste liquid flowmeter to the granulator in with the xylitol waste liquid in the xylitol waste liquid storage tank.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic structural diagram of another embodiment of the present invention;
wherein: 1. An absorption tower; 2. a dust remover; 3. a distribution box; 4. a dust storehouse; 5. a desulfurized fly ash storage tank; 6. a granulator; 7. a sludge storage bin; 8. a xylitol waste liquid storage tank; 9. an emptying pipe; 10. a chimney; 11. an induced draft fan; 12. a packing auger; 13. a belt conveyor; 14. a waste liquid pipe; 15. a waste liquid pump; 16. a waste liquid flow meter; 17. waste liquid flow control valve.
Detailed Description
The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.
It will be understood that when an element is referred to as being "on," "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.
Example 1
As shown in fig. 1, the resource utilization system for semi-dry desulfurized fly ash comprises an absorption tower 1, a dust remover 2 and a distribution box 3 which are sequentially arranged, wherein the absorption tower 1, the dust remover 2 and the distribution box 3 are connected through pipelines, the distribution box 3 is respectively connected with an ash storehouse 4 and a desulfurized fly ash storage tank 5, the desulfurized fly ash storage tank 5 is connected with a granulator 6, and the granulator 6 is further connected with a sludge storage bin 7 and a xylitol waste liquid storage tank 8. Conveying desulfurized ash formed after the absorbent reacts in the absorption tower 1 to a desulfurized ash storage tank 5 and then conveying the desulfurized ash to a granulator 6, conveying dyed sludge to the granulator 6 through a conveying belt, conveying xylitol waste liquid to the granulator 6, mixing the desulfurized ash, the sludge and the xylitol waste liquid in the granulator 6, and preparing biomass particles; the biomass particles and coal are mixed according to a certain proportion and then are put into a furnace for combustion. The utility model discloses the maximize utilizes effective desulfurization composition calcium carbonate in the desulfurization ash, has avoided taking place because of the condition that desulfurization ash calcium carbonate content hangs down the interior desulfurization efficiency of influence stove, reduces the environmental protection cost, has solved the problem of dyeing sludge and xylitol waste liquid treatment difficulty simultaneously.
Example 2
As shown in fig. 2, the present embodiment is different from embodiment 1 in that: the dust remover 2 is also provided with a vent pipe 9; the blow-down pipe 9 is connected with a chimney 10.
Wherein, an induced draft fan 11 is arranged on the emptying pipe 9.
And an auger 12 is also arranged between the desulfurized fly ash storage tank 5 and the granulator 6. The auger 12 can convey the desulfurized fly ash to the granulator 6 and can also control the conveying amount of the desulfurized fly ash.
Wherein a belt conveyor 13 is arranged between the granulator 6 and the sludge storage bin 7. Dyeing sludge is directly pumped from the bottom of the dyeing wastewater pool to a squeezer to remove part of water, the squeezed sludge enters a storage bin and enters the granulator 6 through a belt conveyor 13, and the conveying amount of the sludge entering the granulator 6 is controlled by controlling the speed of the belt conveyor 13.
Wherein the xylitol waste liquid storage tank 8 is connected with the granulator 6 through a waste liquid pipe 14.
Wherein, a waste liquid pump 15 is arranged on the waste liquid pipe 14.
Wherein, the waste liquid pipe 14 is further provided with a waste liquid flow meter 16 and a waste liquid flow regulating valve 17. The waste liquid pump 15 conveys the xylitol waste liquid in the xylitol waste liquid storage tank 8 to the granulator 6, and the waste liquid flow regulating valve 17 and the waste liquid flowmeter 16 are arranged to conveniently regulate the amount of the waste liquid.
The use steps of the system are as follows:
(1) Flue gas generated by combustion of the circulating fluidized bed boiler enters an absorption tower 1 to react with an absorbent, and desulfurization is carried out to generate desulfurized fly ash;
(2) The desulfurized ash enters a dust remover 2 and is stored in an ash storehouse 4 below the dust remover 2;
(3) Part of the desulfurized ash enters the absorption tower 1 through a return ash system for cyclic utilization;
(4) Surpass ash storehouse 4 and store material level (ash storehouse pressure reaches 7.5 kpa) partial desulfurization ash and get into desulfurization ash storage tank 5 through distributor box 3, and dyeing sludge is direct to be taken out to the squeezer from dyeing wastewater pool bottom and is taken off partial moisture, and the mud after squeezing gets into mud storage bin 7 and gets into granulator 6 and desulfurization ash, xylitol waste liquid and mix the proportion pelletization, mixes the proportion desulfurization ash through band conveyer 13: sludge: waste = 7;
(5) The prepared biomass particles are uniformly mixed with coal according to the proportion of 1.
The method is mainly suitable for the condition that the content of calcium carbonate in the desulfurized fly ash is lower than 35 percent, and the desulfurization mode is the condition that the desulfurization in the furnace is matched with the desulfurization outside the semi-dry method furnace. The traditional desulfurized fly ash granulation blending smashed biomass raw material has poor granulation performance and loose discharging, and is not beneficial to blending coal and entering a furnace for combustion. Through continuous exploration, the granulation effect is good by adopting the mode that the dyeing sludge is matched with the xylitol waste liquid and is mixed with the desulfurized fly ash, and the problem that the dyeing sludge and the xylitol waste liquid are difficult to treat is solved.
The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the technical matters of the present invention all fall into the protection scope of the present invention to any simple modification and equivalent change of the above embodiments.
Claims (9)
1. The utility model provides a semidry desulfurization ash utilization system, includes absorption tower (1), dust remover (2) and distributor box (3) that set gradually, its characterized in that: the distribution box (3) is respectively connected with the ash storehouse (4) and the desulfurized ash storage tank (5), the desulfurized ash storage tank (5) is connected with the granulator (6), and the granulator (6) is also connected with the sludge storage bin (7) and the xylitol waste liquid storage tank (8).
2. The semidry desulfurized fly ash resource utilization system according to claim 1, characterized in that: and the dust remover (2) is also provided with a vent pipe (9).
3. The semidry desulfurized fly ash resource utilization system according to claim 2, characterized in that: the emptying pipe (9) is connected with a chimney (10).
4. The resource utilization system for semi-dry desulfurized fly ash according to claim 3, characterized in that: and the emptying pipe (9) is provided with an induced draft fan (11).
5. The semidry desulfurized fly ash resource utilization system according to claim 1 or 4, wherein: and a packing auger (12) is also arranged between the desulfurized fly ash storage tank (5) and the granulator (6).
6. The semidry desulfurized fly ash resource utilization system according to claim 5, wherein: a belt conveyor (13) is arranged between the granulator (6) and the sludge storage bin (7).
7. The resource utilization system for semi-dry desulfurized fly ash according to claim 6, characterized in that: the xylitol waste liquid storage tank (8) is connected with the granulator (6) through a waste liquid pipe (14).
8. The semidry desulfurized fly ash resource utilization system according to claim 7, wherein: and a waste liquid pump (15) is arranged on the waste liquid pipe (14).
9. The semidry desulfurized fly ash resource utilization system according to claim 8, wherein: and the waste liquid pipe (14) is also provided with a waste liquid flowmeter (16) and a waste liquid flow regulating valve (17).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222870516.4U CN218853959U (en) | 2022-10-31 | 2022-10-31 | Semi-dry desulfurization ash resource utilization system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222870516.4U CN218853959U (en) | 2022-10-31 | 2022-10-31 | Semi-dry desulfurization ash resource utilization system |
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| CN202222870516.4U Active CN218853959U (en) | 2022-10-31 | 2022-10-31 | Semi-dry desulfurization ash resource utilization system |
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