CN203620504U - System for dedusting and desulfurizing by utilizing fly ash - Google Patents

System for dedusting and desulfurizing by utilizing fly ash Download PDF

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Publication number
CN203620504U
CN203620504U CN201320751095.1U CN201320751095U CN203620504U CN 203620504 U CN203620504 U CN 203620504U CN 201320751095 U CN201320751095 U CN 201320751095U CN 203620504 U CN203620504 U CN 203620504U
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China
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desulfurizing tower
flue gas
cyclone dust
desulfurizing
fly ash
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CN201320751095.1U
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Chinese (zh)
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赵长兴
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Jinjiang Meichuang Environmantal Protection Equipment Co Ltd
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Jinjiang Meichuang Environmantal Protection Equipment Co Ltd
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Abstract

The utility model discloses a system for dedusting and desulfurizing by utilizing fly ash. The system comprises a cyclone dust collector, a desulfurizing tower and a circulating pool, wherein the cyclone dust collector is provided with a flue gas inlet, and the flue gas outlet of the cyclone dust collector is communicated to the flue gas inlet of the desulfurizing tower through a flue gas pipeline; a circulating pipeline is guided from the circulating pool to the desulfurizing tower, and a desulfurizing pipeline is guided from the bottom of the desulfurizing tower into the circulating pool. When the desulfurization system works, the flue gas desulfurization is realized through related physical and chemical action by utilizing direct action between an active oxide contained in a flue gas and water circulating liquid and a surface active agent in the desulfurizing tower. The integral system disclosed by the utility model is simple in structure, extremely reasonable and optimized in design and simple in corresponding processing step, and realizes standard emission of flue gas and low-cost operation. According to the utility model, the desulfurized fly ash can be subjected to pressure filtration to form a semi-solid state and then secondarily utilized for an admixture of concrete and the field of red brick production, so that the integral cyclic utilization of the fly ash is realized, and the utilization value of the fly ash is sufficiently exerted.

Description

One is utilized flyash dusting and desulfuring system
Technical field
The utility model relates to coal dust firing flue gas desulfurization technique field, specifically refers to that one utilizes flyash dusting and desulfuring system, is applicable to the desulfurization application of small and medium-sized industrial coal powder boilers SO 2 from fume.
Background technology
Industrial coal powder boiler is the novel furnace that China developed in recent years, and flyash is the main solid waste that industrial coal powder boiler is discharged.Along with industrial development, the technology of industrial coal powder boiler is constantly ripe, and have start fast, load regulation range is wide, automaticity is high and low power consumption and other advantages, comes into operation more and more at industry, civil area.How the flyash producing after burning processes and how to realize effective comprehensive cyclic utilization to it extremely crucial in industrial production, current flyash mainly, with being as concrete admixture and producing common brick field, never has good solution in processing and comprehensive cyclic utilization.Thus for coal ash lifting becomes the task of top priority for a kind of more efficiently comprehensive cyclic utilization.
The main oxides composition of the flyash after coal powder boiler combustion has: SiO 2, Al 2o 3, FeO, Fe 2o 3, CaO, MgO etc., wherein SiO 2, Al 2o 3potter's clay class material composition is greater than 56%, and in residue alkaline matter composition, CaO composition accounts for 10%-20%, and MgO accounts for 0.5%-2%.CaO, MgO are activating oxide, can be made full use of, and this novel further investigation thus, from the contained activating oxide of existing flyash, by utilizing the characteristic of coal dust ash, invention one is utilized flyash dusting and desulfuring system, and this case produces thus.
Utility model content
The purpose of this utility model is to provide a kind of simple for structure flyash dusting and desulfuring system that utilizes, and the activating oxide making full use of in flyash is realized flue gas desulfurization processing, for coal dust ash comprehensive cyclic utilization provides a kind of new way.
In order to reach above-mentioned purpose, solution of the present utility model is:
One is utilized flyash dusting and desulfuring system, comprise cyclone dust collectors, desulfurizing tower and circulatory pool, these cyclone dust collectors are provided with smoke inlet, the exhanst gas outlet of described cyclone dust collectors passes to the smoke inlet of described desulfurizing tower via flue, described circulatory pool is drawn a circulating line to described desulfurizing tower, and a desulfuration pipeline is drawn to described circulatory pool in this desulfurizing tower bottom.
The ash hole of described cyclone dust collectors is provided with the conveying worm for delivery of ash material.
The outlet end of described circulating line divides upper and lower two-way to cause respectively on described desulfurizing tower.
Described circulatory pool is drawn on slip pipeline to filter press.
Described desulphurization circulating pond and described filter press are interval with an intermediate pool.
Adopt after such scheme, the utility model is with respect to the beneficial effect of prior art: when desulphurization system work, make full use of calcium oxide powder (activating oxide) contained in flue gas as desulphurization reaction agent, directly in desulfurizing tower with water circulation liquid and surfactant acting in conjunction, realize flue gas desulfurization by related physical chemical action, treated clean flue gas is realized qualified discharge, can directly enter atmosphere except after aqueous vapor.Whole system is simple for structure, designs extremely reasonably optimizing, and corresponding processing step is succinct, realizes flue gas qualified discharge and low cost movement.Coal dust ash after desulfurization can become the semisolid new performance secondary utilization of laying equal stress on through press filtration, continues on for concrete admixture and produces common brick field, realizes thus the comprehensive cyclic utilization of flyash and gives full play to value.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model desulphurization system.
Label declaration
Cyclone dust collectors 1 smoke inlet 11
Flue 12 air-introduced machines 13
Conveying worm 14 desulfurizing towers 2
Desulfuration pipeline 21 circulatory pools 3
Circulating line 31 circulating pumps 32
Slip pipeline 33 filter presses 4
Pipe blow-through 5 force (forcing) pumps 51
The first powder ash truck 6 second powder ash trucks 7
Lift truck 8
The specific embodiment
Below in conjunction with the drawings and specific embodiments, this case is described in further detail.
This novel one that relates to is utilized flyash dusting and desulfuring system, shown in Figure 1, mainly comprises cyclone dust collectors 1, desulfurizing tower 2 and circulatory pool 3.
Cyclone dust collectors 1 are provided with smoke inlet 11, and the exhanst gas outlet of cyclone dust collectors 1 passes to the smoke inlet of desulfurizing tower 2 via flue 12 and air-introduced machine 13.Desulfuration pipeline 21 is drawn to circulatory pool 3 in desulfurizing tower 2 bottoms.For the ease of drainage, circulatory pool 3 is directly located to desulfurizing tower 2 lower positions.Circulatory pool 3 is drawn a circulating line 31 to desulfurizing tower 2, and the circulating pump 32 for driving circulation fluid to circulate is installed on circulating line 31.Preferably, circulating line 31 divides upper and lower two-way to introduce desulfurizing tower 2 particularly.The double-deck turbine wet desulfuration tower of the corresponding better employing of desulfurizing tower 2.
This is novel, and to relate to the processing step utilizing in the work of flyash dusting and desulfuring system as follows:
1) burning is introduced to cyclone dust collectors 1 with the flue gas of flyash later, described flyash is mainly made up of glass microballoon body, spongy porous particle and calcium oxide powder;
2) by cyclone dust collectors 1 to glass microballoon crystal contained in flue gas and absorption SO 2sponge shape porous particle from flue gas, depart from, send flyash contained in the flue gas of cyclone dust collectors 1 and be mainly the spongy particle of calcium oxide powder and part lightweight;
3) flue gas of sending from cyclone dust collectors 1 is sent into desulfurizing tower 2, in desulfurizing tower 2, the spongy particle of described calcium oxide powder and part lightweight and the water circulation liquid generation physics chemical action that contains surfactant, realize flue gas desulfurization; Water circulation liquid circulates between desulfurizing tower 2 and circulatory pool.
In coal dust firing, major part burnouts, and remaining powdered coal cinder forms glass microballoon body, spongy particle and calcium oxide ashes.Wherein, in coal dust, contain CaCO 3with other material that produces escaping gas, in high-temp combustion, generate CaO, CO 2deng other gas, due to volatilization and the chemical reaction effect of gas, form the burnt particle of porous shape, like Sponge, specific area is about 0.8~2.4m 2/ g has good saturated adsorption power to sulfur dioxide as activated carbon.Approximately 1200 ℃ of coal dust fusing points, 1280 ℃ of boiling points.Potter's clay class material forms glass microballoon crystal 1200 ℃ of left and right at molten o'clock in high-temp combustion, and glass microballoon, in the middle collision and fusion of advancing, forms the high-density large-particle that volume and quality increase, and is easily separated by cyclone dust collectors 1.The melting temperature of calcium oxide (CaO) is 2580 ℃, in stove, burning cannot reach and dissolve, and saves as dry powder (calcium oxide powder), and cyclone dust collectors 1 cannot depart from it, thereby enter desulfurizing tower 2 with flue gas and participate in desulfurization main reaction, play important acid-base neutralization balanced action.
The spongy particle that high-temp combustion forms can absorb water vapour and SO in flue gas is advanced 2gas, after absorption, this part forms the spongy particle of relative heavy.The glass microballoon crystal of collision and fusion weightening finish and absorption SO thus 2sponge shape porous particle separated by cyclone dust collectors 1, the flyash separating accounts for 75% left and right of ash amount.
Conventionally the flue gas with flyash after burning generally first passes into air preheater (not shown), passes into afterwards cyclone dust collectors 1 again.The ash hole of cyclone dust collectors 1 bottom is provided with a conveying worm 14, carries powder ash to the first powder ash truck 6 of collecting by this conveying worm 14.Adopt conveying worm 14 to carry and can goodly avoid dust to be distributed to surrounding air, powder ash be carried respond well.
Preferably, the water circulation liquid that circulatory pool 3 is contained to surfactant by circulating pump 32 divides upper and lower two-way to spray into desulfurizing tower 2, the double-deck turbine wet desulfuration tower of the better employing of desulfurizing tower 2.The spongy particle of described calcium oxide powder and part lightweight and the water circulation liquid generation physics chemical action that contains surfactant, wherein calcium oxide powder is mainly brought into play chemical desulfurization effect, first reacts generation alkaline matter with water chemistry, then with sour gas SO 2chemical reaction is realized desulfurization; The spongy particle of lightweight is mainly brought into play physical desulfurization effect, by strong absorption SO 2to realize desulfidation.The micro-surfactant adding in water circulation liquid is preferably triethanolamine.It has asymmetric parents matchmaker's property effect structure, can increase medium and in smoke pipe and desulfurizing tower, catch and grab oiliness dust and SO 2ability.
In described desulfurizing tower 2 desulfurization, water circulation liquid becomes desulfurization slurry (being solid waste thing) gradually, contains calcium sulfite precipitation in this desulfurization slurry.Preferably, circulatory pool 3 is also drawn on slip pipeline 33 to one filter presses 4, to the press filtration of anhydrating of the solid waste thing of the interior band of circulatory pool 3 precipitation.The recycle-water of press filtration gained preferably causes in circulatory pool 3 by a recovery channel, to carry out secondary utilization to reclaiming waste water, energy-conservation, reduce discharging and environmental protection.Press filtration gained powder ash is accepted by the second powder ash truck 7, and is transported outward by lift truck 8.
Further, circulatory pool 3 is interior can also first cause an intermediate pool (not shown) before solid waste thing is caused to filter press 4, via quick-fried oxygen blower fan (not shown) to desulfurization slurry oxygenation, react the lime-ash generating with dihydrate gypsum with calcium sulfite, by the press filtration of anhydrating of this lime-ash, then transport outward and carry out secondary utilization.Described lime-ash anhydrates and produces and have middle wastewater in press filtration, can reclaim equally to reuse.
To sum up, the utility model desulphurization system is improved on existing coal dust firing and desulphurization system basis, the technology that each processing step corresponding to system comprises complements each other, directly utilize this characteristic of flyash activity composition, it has been passed into desulfurizing tower together with flue gas and realize flue gas desulfurization effect.Have turn waste into wealth, non-secondary pollution, the advantage such as processing step is succinct, operating cost is low, emission compliance.
The foregoing is only preferred embodiment of the present utility model, all equalizations of doing with the utility model claim scope change and modify, and all should belong to the scope of the utility model claim.

Claims (5)

1. one kind is utilized flyash dusting and desulfuring system, it is characterized in that: comprise cyclone dust collectors, desulfurizing tower and circulatory pool, these cyclone dust collectors are provided with smoke inlet, the exhanst gas outlet of described cyclone dust collectors passes to the smoke inlet of described desulfurizing tower via flue, described circulatory pool is drawn a circulating line to described desulfurizing tower, and a desulfuration pipeline is drawn to described circulatory pool in this desulfurizing tower bottom.
2. one as claimed in claim 1 is utilized flyash dusting and desulfuring system, it is characterized in that: the ash hole of described cyclone dust collectors is provided with the conveying worm for delivery of ash material.
3. one as claimed in claim 1 is utilized flyash dusting and desulfuring system, it is characterized in that: the outlet end of described circulating line divides upper and lower two-way to cause respectively on described desulfurizing tower.
4. one as claimed in claim 1 is utilized flyash dusting and desulfuring system, it is characterized in that: described circulatory pool is drawn on slip pipeline to filter press.
5. one as claimed in claim 4 is utilized flyash dusting and desulfuring system, it is characterized in that: described desulphurization circulating pond and described filter press are interval with an intermediate pool.
CN201320751095.1U 2013-11-22 2013-11-22 System for dedusting and desulfurizing by utilizing fly ash Active CN203620504U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103599691A (en) * 2013-11-22 2014-02-26 赵长兴 Technology and system for removing dust and sulfur by using coal ash

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103599691A (en) * 2013-11-22 2014-02-26 赵长兴 Technology and system for removing dust and sulfur by using coal ash

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