CN104941432A - Synergistic treatment device for dust removing and desulphurization - Google Patents
Synergistic treatment device for dust removing and desulphurization Download PDFInfo
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- CN104941432A CN104941432A CN201510315376.6A CN201510315376A CN104941432A CN 104941432 A CN104941432 A CN 104941432A CN 201510315376 A CN201510315376 A CN 201510315376A CN 104941432 A CN104941432 A CN 104941432A
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Abstract
The invention discloses a synergistic treatment device for dust removing and desulphurization. The synergistic treatment device adopts the structure that a primary smoke dust removing and desulphurization area, a secondary smoke dust removing and desulphurization area and a defogging device are sequentially arranged in a tower body in the smoke flowing direction; a porous distribution plate of the primary smoke dust removing and desulphurization area is arranged in the tower body above a smoke inlet; primary spraying layers are arranged in the tower body above the porous distribution plate; a synergistic ring I is arranged between two adjacent primary spraying layers; a liquid collection disc of the secondary smoke dust removing and desulphurization area is positioned in the center of the tower body above the primary spraying layer; a ring-shaped plate is arranged in the tower body above the liquid collection disc; the inner diameter of the ring-shaped plate is smaller than the outer diameter of the liquid collection disc; secondary spraying layers are fixed above the ring-shaped plate in the tower body; a synergistic ring II is arranged between two adjacent secondary spraying layers. The synergistic treatment device has the advantages that dust removing and desulphurization are subjected to hierarchical and synergistic treatment, and a desulphurization spraying tower can be used for achieving efficient dust removing and desulphurization simultaneously, so that the investment and the operation cost can be reduced.
Description
Technical field
The present invention relates to a kind of dust-removal and desulfurizing associated treatment device.
Background technology
According to " coal electricity energy-saving and emission-reduction upgrading and transformation action plan (2014-the year two thousand twenty) ", require that the newly-built Thermal generation unit in eastern region reaches combustion engine standard substantially, under benchmark oxygen content 6% condition, emission limit is flue dust: 10mg/m
3, SO
2: 35mg/m
3; Some areas government has put into effect stricter policy, regulation, and due to reasons such as environmental carrying capacity are limited, the Yangtze River Delta, Pearl River Delta Deng Di partial fuel coal power plant with reference to combustion engine standard limited value, require that emission limit is flue dust: 5mg/m
3, SO
2: 35mg/m
3.When coal-fired sulfur content is lower, if FGD entrance so2 concentration is lower than 3000mg/m
3unit, for reaching 35mg/m
3discharge standard, requires that desulfuration efficiency is greater than 98.8%, and existing single-stage spray desulfurizing tower upgrading also can meet ultra-clean emission request.When coal-fired sulfur content is higher, as FGD entrance so2 concentration is greater than the unit of 4000mg/m3, for reaching neat stress 35mg/m
3discharge standard, require that desulfuration efficiency needs stable operation more than 99.1%, prior art can adopt series connection double tower technology (patent No. CN101927125A) or single tower Two-way Cycle technology (patent No. CN103846005A), but the dust concentration of FGD outlet is 20mg/m substantially
3left and right.5mg/m is less than in order to reach outlet dust concentration
3ultra-clean emission request, wet electrical dust precipitator need be set in the outlet of FGD, and wet electrical dust precipitator need be greater than the dust removal efficiency of 75%.
When coal-fired sulfur content is higher, series connection double tower technology or single tower Two-way Cycle technology can meet the emission request of sulfur dioxide, desulfuration efficiency even can to more than 99%, but it is not obvious for the removal effect of dust, because FGD exports carrying of gypsum slurries in actual motion, the discharge of outlet dust is not accomplished lower than 5mg/m3 at all, need arrange wet electrical dust precipitator in the outlet of FGD.The combination of single tower Two-way Cycle technology and wet electrical dust precipitator, can meet ultra-clean emission request, but equipment investment cost is large, and the equipment investment cost of the combination of series connection double tower technology and wet electrical dust precipitator is even larger.Moreover for some retrofitted unit, due to the restriction in place, layout of can not having living space wet electrical dust precipitator.
Summary of the invention
The object of the present invention is to provide a kind of dust-removal and desulfurizing associated treatment device, effectively can solve the problem that existing series connection double tower technology dust removing effects is not good.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions: a kind of dust-removal and desulfurizing associated treatment device, comprise tower body, described tower body bottom is provided with gas approach, described tower body top is provided with exhanst gas outlet, is provided with one-level flue-gas dust-removing and desulfurization district, secondary smoke dust-removal and desulfurizing district and demister successively in described tower body by flow of flue gas direction;
Described one-level flue-gas dust-removing and desulfurization district comprises multihole distributor, CPR dust and at least two-layer one-level spraying layer, described multihole distributor is arranged in the tower body above gas approach, one-level spraying layer is arranged in the tower body above multihole distributor, is provided with the CPR dust that tower body edge flue gas is assembled to tower body center between adjacent two-layer one-level spraying layer;
Described secondary smoke dust-removal and desulfurizing district comprises catch tray, annular slab, CPR dust and at least two-layer secondary spraying layer, described catch tray is positioned at the center of tower body above one-level spraying layer, be provided with the annular slab of secondary spraying layer ejection liquid to tower body center convergence in tower body above described catch tray, the internal diameter of described annular slab is less than the external diameter of catch tray, secondary spraying layer is fixed on the top of annular slab in tower body, is provided with the CPR dust that tower body edge flue gas is assembled to tower body center between adjacent secondary spraying layer.
Preferably, the percent opening of multihole distributor is 30% ~ 45%; Both can ensure passing through of flue gas, and also be easy to form liquid film on surface, fully contact with flue gas.
Preferably, the tower body below described gas approach is stair oxidation pond, and it is one-level spraying layer feed flow that described stair oxidation pond is connected with primary cycle pump; Form circulation for one-level spraying layer feed flow.
Preferably, be also provided with first mixer in described stair oxidation pond, stair oxidation pond is connected with stair oxidation blower fan, and the bottom in stair oxidation pond is provided with accessory substance excavationg pump; First mixer prevents solid suspended particle from precipitating, and blower fan is used for the sulfite oxidation in stair oxidation pond to become sulfate, and accessory substance excavationg pump is used for the discharge of accessory substance.
Preferably, described tower body outside is provided with the outer stock tank of tower, and the outer stock tank of described tower is connected with catch tray, and described tower outward stock tank is also secondary spraying layer feed flow by secondary cycle pump; Form secondary cycle.
Preferably, be provided with secondary agitator in the outer stock tank of described tower, the outer stock tank of tower is connected with secondary oxidation blower fan; Prevent solid suspended particle precipitation in the outer stock tank of tower, sulfite oxidation in outer for tower stock tank is become sulfate by secondary oxidation blower fan.
Preferably, described demister is made up of at least three layers of ridge type demister; Reach good in fog effect, make discharge flue gas meet standard.
Compared with prior art, advantage of the present invention is: two stage cycle desulfurization and dedusting sound zone system can independent operating, can ensure very high desulfuration efficiency and lower liquid-gas ratio, significantly reduce the energy consumption of circulating pump; Desulfurization and dedusting are by classification associated treatment, and desulfuration spray tower reaches the object of high-efficiency desulfurization and dedusting simultaneously, can reduce investment and operating cost; For sulphur coal flue gas desulfurization particularly suitable, desulfuration efficiency can reach more than 99%, and dust removal efficiency can reach more than 75%, saves floor space simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of dust-removal and desulfurizing associated treatment of the present invention device.
Detailed description of the invention
Consult the embodiment that Fig. 1 is a kind of dust-removal and desulfurizing associated treatment of the present invention device, a kind of dust-removal and desulfurizing associated treatment device, comprise tower body 1, described tower body 1 bottom is provided with gas approach 2, described tower body 1 top is provided with exhanst gas outlet 9, is provided with one-level flue-gas dust-removing and desulfurization district, secondary smoke dust-removal and desulfurizing district and demister 8 successively in described tower body 1 by flow of flue gas direction;
Described one-level flue-gas dust-removing and desulfurization district comprises multihole distributor 17, CPR dust 18 and at least two-layer one-level spraying layer 6, described multihole distributor 17 is arranged in the tower body 1 above gas approach 2, one-level spraying layer 6 is arranged in the tower body 1 above multihole distributor 17, is provided with the CPR dust 18 that tower body 1 edge flue gas is assembled to tower body 1 center between adjacent two-layer one-level spraying layer 6; The percent opening of multihole distributor 17 is 30% ~ 45%, tower body 1 below described gas approach 2 is stair oxidation pond 3, described stair oxidation pond 3 is connected with primary cycle pump 12 for one-level spraying layer 6 feed flow, first mixer 11 is also provided with in described stair oxidation pond 3, stair oxidation pond 3 is connected with stair oxidation blower fan 10, and the bottom in stair oxidation pond 3 is provided with accessory substance excavationg pump 19;
Described secondary smoke dust-removal and desulfurizing district comprises catch tray 4, annular slab 5, CPR dust 18 and at least two-layer secondary spraying layer 7, described catch tray 4 is positioned at the center of tower body 1 above one-level spraying layer 6, be provided with in tower body 1 above described catch tray 4 and secondary spraying layer 7 is sprayed the annular slab 5 of liquid to tower body 1 center convergence, the internal diameter of described annular slab 5 is less than the external diameter of catch tray 4, secondary spraying layer 7 is fixed on the top of annular slab 5 in tower body 1, the CPR dust 18 that tower body 1 edge flue gas is assembled to tower body 1 center is provided with between adjacent secondary spraying layer 7, described tower body 1 outside is provided with the outer stock tank 13 of tower, the outer stock tank 13 of described tower is connected with catch tray 4, it is secondary spraying layer 7 feed flow that the outer stock tank 13 of described tower also passes through secondary cycle pump 16, secondary agitator 15 is provided with in the outer stock tank 13 of described tower, the outer stock tank 13 of tower is connected with secondary oxidation blower fan 14,
Described demister 8 is made up of at least three layers of ridge type demister.
The longitudinal section of CPR dust and annular slab is triangle, and upper surface is all downward-sloping, and lower surface is all inclined upwardly.
Through zoning design, two stage cycle desulfurization and dedusting sound zone system can independent operating, by controlling the different pH value of two stage cycle slurries, primary cycle pH value lower 4.6 ~ 5.2 reaches high oxygenation efficiency and lime stone dissolves, and secondary cycle pH value higher 5.5 ~ 6.2 reaches high SO
2absorb.By the associated treatment of primary cycle, secondary cycle and demister 8, thus reach SO
2, dust ultra-clean discharge.
First flue gas through multihole distributor 17 (percent opening is 30% ~ 45%), multihole distributor 17 keeps the slurries that one deck sprays from one-level spraying layer 6, aperture is formed one deck uniform liquid film, enhances SO
2to the mass transfer of slurries, the slurry layer formed has wrapped up part dust, is removed a part at this dust, and multihole distributor 17 reaches the effect of uniform air-flow simultaneously, be less than 15% root-mean-square-deviation by wind drift after multihole distributor 17, have good help to follow-up dedusting and desulfurization; The slurries counter current contacting that flue gas then gets off with one-level spraying layer 6, the high density that one-level sprays every layer of spray 200%-300% covers, and flue gas is fully washed, SO
2further removed with dust; Establish CPR dust 18 between one-level spraying layer 6, make the slurries of wall stream fully take part in reaction, improve SO to a certain extent
2removal efficiency, and make air flow method evenly; Flue gas out enters secondary cycle desulfurization and dedusting district afterwards from primary cycle desulfurization and dedusting district, and the marginal portion slurries of secondary spraying layer 7 form serosa in the below of annular slab 5, when flue gas is through serosa, and SO
2further removed with dust; Flue gas above annular slab 5 out after and the slurries counter current contacting that spray of secondary, secondary sprays the high density covering that every layer sprays 200%-300%, flue gas is fully washed, SO
2further removed with dust; When flue gas eventually passes high-efficiency demisting apparatus 8, dust and the gypsum slurries carried obtain the removal of a darker level, and demister 8 is made up of three layers of ridge type demister, and in exiting flue gas, Quality of fogdrop concentration should be not more than 30mg/m
3.
Desulfurization and dedusting are by the classification associated treatment of each step above-mentioned, and desulfuration efficiency can reach more than 99%, SO
2outlet drain can be controlled in 35mg/m
3below, dust removal efficiency can reach more than 75%, and dust outlet discharge can be controlled in 5mg/m
3below, thus reach SO
2, dust ultra-clean discharge.
The foregoing is only specific embodiments of the invention, but technical characteristic of the present invention is not limited thereto, any those skilled in the art is in the field of the invention, and the change done or modification are all encompassed among the scope of the claims of the present invention.
Claims (7)
1. a dust-removal and desulfurizing associated treatment device, comprise tower body (1), described tower body (1) bottom is provided with gas approach (2), described tower body (1) top is provided with exhanst gas outlet (9), it is characterized in that: be provided with one-level flue-gas dust-removing and desulfurization district, secondary smoke dust-removal and desulfurizing district and demister (8) successively by flow of flue gas direction in described tower body (1);
Described one-level flue-gas dust-removing and desulfurization district comprises multihole distributor (17), CPR dust (18) and at least two-layer one-level spraying layer (6), described multihole distributor (17) is arranged in the tower body (1) of gas approach (2) top, one-level spraying layer (6) is arranged in the tower body (1) of multihole distributor (17) top, is provided with the CPR dust (18) that tower body (1) edge flue gas is assembled to tower body (1) center between adjacent two-layer one-level spraying layer (6);
Described secondary smoke dust-removal and desulfurizing district comprises catch tray (4), annular slab (5), CPR dust (18) and at least two-layer secondary spraying layer (7), described catch tray (4) is positioned at the center of one-level spraying layer (6) top tower body (1), be provided with the annular slab (5) of secondary spraying layer (7) ejection liquid to tower body (1) center convergence in the tower body (1) of described catch tray (4) top, the internal diameter of described annular slab (5) is less than the external diameter of catch tray (4), secondary spraying layer (7) is fixed on the top of tower body (1) interior annular slab (5), the CPR dust (18) that tower body (1) edge flue gas is assembled to tower body (1) center is provided with between adjacent secondary spraying layer (7).
2. a kind of dust-removal and desulfurizing associated treatment device as claimed in claim 1, is characterized in that: the percent opening of multihole distributor (17) is 30% ~ 45%.
3. a kind of dust-removal and desulfurizing associated treatment device as claimed in claim 1, it is characterized in that: the tower body (1) of described gas approach (2) below is stair oxidation pond (3), and described stair oxidation pond (3) is connected with primary cycle pump (12) for one-level spraying layer (6) feed flow.
4. a kind of dust-removal and desulfurizing associated treatment device as claimed in claim 3, it is characterized in that: in described stair oxidation pond (3), be also provided with first mixer (11), stair oxidation pond (3) is connected with stair oxidation blower fan (10), and the bottom of stair oxidation pond (3) is provided with accessory substance excavationg pump (19).
5. a kind of dust-removal and desulfurizing associated treatment device as claimed in claim 1, it is characterized in that: described tower body (1) outside is provided with the outer stock tank (13) of tower, the outer stock tank (13) of described tower is connected with catch tray (4), and it is secondary spraying layer (7) feed flow that the outer stock tank (13) of described tower also passes through secondary cycle pump (16).
6. a kind of dust-removal and desulfurizing associated treatment device as claimed in claim 5, it is characterized in that: be provided with secondary agitator (15) in the outer stock tank (13) of described tower, the outer stock tank (13) of tower is connected with secondary oxidation blower fan (14).
7. a kind of dust-removal and desulfurizing associated treatment device as claimed in claim 1, is characterized in that: described demister (8) is made up of at least three layers of ridge type demister.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510315376.6A CN104941432A (en) | 2015-06-10 | 2015-06-10 | Synergistic treatment device for dust removing and desulphurization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510315376.6A CN104941432A (en) | 2015-06-10 | 2015-06-10 | Synergistic treatment device for dust removing and desulphurization |
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| CN104941432A true CN104941432A (en) | 2015-09-30 |
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ID=54156818
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|---|---|---|---|
| CN201510315376.6A Pending CN104941432A (en) | 2015-06-10 | 2015-06-10 | Synergistic treatment device for dust removing and desulphurization |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105879636A (en) * | 2016-04-19 | 2016-08-24 | 庄建中 | Wet desulfurization equipment for coal fired boiler |
| CN106334416A (en) * | 2016-10-27 | 2017-01-18 | 浙江天地环保科技有限公司 | Integrated flue gas desulfurization and dust removal device used in coal-fired power plant |
| CN106621780A (en) * | 2017-03-01 | 2017-05-10 | 武汉立为工程技术有限公司 | Efficient single-tower double-circulation devulcanizing dust removing device |
| CN106731591A (en) * | 2017-01-23 | 2017-05-31 | 浙江菲达环保科技股份有限公司 | Two stage cycle subregion desulfurizing tower |
| CN107899406A (en) * | 2017-11-17 | 2018-04-13 | 湖南辰州矿业有限责任公司 | A kind of sulfur dioxide flue gas absorption system and its method for administering sulfur dioxide flue gas |
| CN109316923A (en) * | 2017-07-31 | 2019-02-12 | 沈阳天航环保科技有限公司 | High-efficiency multi-stage Spiralism type dynamic fluid flow film process flue gas device and processing method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105879636A (en) * | 2016-04-19 | 2016-08-24 | 庄建中 | Wet desulfurization equipment for coal fired boiler |
| CN105879636B (en) * | 2016-04-19 | 2019-02-26 | 庄建中 | Coal-burning boiler wet desulphurization equipment |
| CN106334416A (en) * | 2016-10-27 | 2017-01-18 | 浙江天地环保科技有限公司 | Integrated flue gas desulfurization and dust removal device used in coal-fired power plant |
| CN106731591A (en) * | 2017-01-23 | 2017-05-31 | 浙江菲达环保科技股份有限公司 | Two stage cycle subregion desulfurizing tower |
| CN106621780A (en) * | 2017-03-01 | 2017-05-10 | 武汉立为工程技术有限公司 | Efficient single-tower double-circulation devulcanizing dust removing device |
| CN109316923A (en) * | 2017-07-31 | 2019-02-12 | 沈阳天航环保科技有限公司 | High-efficiency multi-stage Spiralism type dynamic fluid flow film process flue gas device and processing method |
| CN107899406A (en) * | 2017-11-17 | 2018-04-13 | 湖南辰州矿业有限责任公司 | A kind of sulfur dioxide flue gas absorption system and its method for administering sulfur dioxide flue gas |
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Application publication date: 20150930 |