CN207365049U - A kind of system of phosphate ore pulp processing boiler exhaust gas coproduction ammonium magnesium phosphate - Google Patents
A kind of system of phosphate ore pulp processing boiler exhaust gas coproduction ammonium magnesium phosphate Download PDFInfo
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- CN207365049U CN207365049U CN201721282824.8U CN201721282824U CN207365049U CN 207365049 U CN207365049 U CN 207365049U CN 201721282824 U CN201721282824 U CN 201721282824U CN 207365049 U CN207365049 U CN 207365049U
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- exhaust gas
- ore pulp
- boiler
- phosphate
- phosphate ore
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Abstract
The utility model discloses a kind of system of phosphate ore pulp processing boiler exhaust gas coproduction ammonium magnesium phosphate, including coal feeder, boiler body, back-end ductwork device, exhaust gas processing device, oxygen-eliminating device, the coal feeder is connected with boiler body, the boiler body is connected by cyclone separator with back-end ductwork device, the lower part of the back-end ductwork device is connected with exhaust gas processing device, and the oxygen-eliminating device is connected with back-end ductwork device and boiler body respectively by feed pump.The utility model makees desulfurizing agent using phosphate ore pulp, absorb the sulfur dioxide in boiler exhaust gas, boiler exhaust gas treatment cost can effectively be reduced, there is catalysis oxidation characteristic using the metal ion such as iron magnesium in phosphorus ore, realize that boiler exhaust gas desulfurization and the technology of phosphorus ore de-magging couple, simplify production equipment, improve phosphorus ore quality, co-production has the ammonium magnesium phosphate of high value.
Description
Technical field
The utility model belongs to boiler exhaust gas processing equipment field, is related to a kind of phosphate ore pulp processing boiler exhaust gas coproduction phosphoric acid
The system of ammonium magnesium.
Background technology
Fire coal circulating fluid bed boiler has, efficiency of combustion strong to fuel tolerance and combustion intensity height, load tune because of it
Adjusting range is wide, to coal point is few and the advantages such as lime-ash remaining carbon is low and by Rapid Popularization application, currently, coal-fired fluidized bed boiler tail gas
Widely used calcium method desulfurization technology, its principle are by the use of lime stone or lime slurry as absorbent, are sent forth into spray column small
Drop, carries out counter current contacting, generationization counter current contacting, occurs to chemically react and generate sulfurous acid with the tail gas containing sulfur dioxide
Calcium, then it is calcium sulfate to be passed through air by calcium sulfite aerating oxidation.Calcium method desulfurization technical matters flow is simple, reliable, but
It is in processing procedure, lime stone blending is uneven to cause the instantaneous discharge beyond standards of tail gas, and secondly consumption of limestone amount is larger, about
Theoretical 2-4 times of consumption, a large amount of thermal energy of boiler are used for decomposition of limestone, and it is only 65-68t/h to cause steam production, and slag ash quantity is obvious
Increase, causes the abrasion of heat transmission equipment (such as boiler tubulation) to aggravate, there are safety and environmental protection hidden danger for device.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of phosphate ore pulp processing boiler exhaust gas coproduction ammonium magnesium phosphate
System, prior art processing cost height can be solved, treatment effect is unstable, the problems such as influencing boiler thermal efficiency.
The utility model is achieved by the following technical programs.
A kind of system of phosphate ore pulp processing boiler exhaust gas coproduction ammonium magnesium phosphate provided by the utility model, including filled to coal
Put, boiler body, back-end ductwork device, exhaust gas processing device, oxygen-eliminating device, the coal feeder is connected with boiler body, described
Boiler body is connected by cyclone separator with back-end ductwork device, the lower part of the back-end ductwork device and exhaust gas processing device
Connection, the oxygen-eliminating device are connected with back-end ductwork device and boiler body respectively by feed pump.
The coal feeder includes coal bunker and feeder, and coal bunker lower part is connected by feeder with boiler body.
The boiler body includes burner hearth, drum, water cooled wind chamber, slag pipe, the drum, burner hearth, water cooled wind chamber, slag
Pipe is sequentially connected from top to bottom, and the upper furnace and lower part are connected with the upper and lower part of cyclone separator respectively.
The back-end ductwork device includes high temperature superheater, low temperature superheater, economizer, Secondary Air air preheater, First air
Air preheater, primary air fan, overfire air fan, the high temperature superheater, low temperature superheater, economizer, Secondary Air air preheater, First air
Air preheater is sequentially connected from top to bottom, and the high temperature superheater is connected with cyclone separator, described First air air preheater one end with
Primary air fan connects, and the other end is connected with water cooled wind chamber, and described Secondary Air air preheater one end is connected with overfire air fan, the other end and
Burner hearth connects, and described economizer one end is connected with oxygen-eliminating device, and the other end is connected with drum, and the low temperature superheater connects with drum
Connect.
The exhaust gas processing device includes electrostatic precipitator, Hui Ku, desulfurizing tower, phosphate ore pulp circulating slot, chimney, the electrostatic
Deduster one end is connected with back-end ductwork device lower part, and the other end is connected by wind turbine with desulfurizing tower lower part, electrostatic precipitator
Lower part is connected by defeated ash pump with grey storehouse, and the phosphate ore pulp circulating slot is connected by circulating pump with desulfurizing tower, on the desulfurizing tower
Portion is connected with chimney.
Spray equipment is equipped with the desulfurizing tower, the spray equipment is connected with phosphate ore pulp circulating slot.
The system further includes material return blower, and the material return blower is connected with cyclone separator.
The beneficial effects of the utility model are：Desulfurizing agent is done using phosphate ore pulp, absorbs the sulfur dioxide in boiler exhaust gas,
Without additionally carrying out desulfurization using lime stone, the thermal efficiency of boiler is improved, and can effectively reduce boiler exhaust gas treatment cost, together
The metal ion such as iron magnesium has catalytic oxidation desulfurization characteristic in Shi Liyong phosphorus ores, realizes the skill of boiler exhaust gas desulfurization and phosphorus ore de-magging
Art couples, and simplifies production equipment, improves phosphorus ore quality, and co-production has the ammonium magnesium phosphate of high value, improves the competitiveness of enterprise,
It can be widely used in phosphoric acid production enterprise.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model；
In figure：1- coal feeders, 2- boiler bodies, 3- cyclone separators, 4- back-end ductwork devices, 5- coal bunkers, 6- is to coal
Machine, 7- burner hearths, 8- drums, 9- water cooled wind chambers, 10- slag pipes, 11- high temperature superheaters, 12- low temperature superheaters, 13- economizers,
14- Secondary Air air preheaters, 15- First air air preheaters, 16- electrostatic precipitator, 17- ashes storehouse, 18- oxygen-eliminating devices, 19- desulfurizing towers, 20-
Phosphate ore pulp circulating slot, 21- chimneys, 22- material return blowers, 23- primary air fans, 24- overfire air fans.
Embodiment
Be described further below the technical solution of the utility model, but claimed scope be not limited to it is described.
As shown in Figure 1, a kind of system of phosphate ore pulp processing boiler exhaust gas coproduction ammonium magnesium phosphate, including coal feeder 1, boiler
Body 2, back-end ductwork device 4, exhaust gas processing device, oxygen-eliminating device 18, the coal feeder 1 are connected with boiler body 2, the pot
Furnace body 2 is connected by cyclone separator 3 with back-end ductwork device 4, and lower part and the vent gas treatment of the back-end ductwork device 4 fill
Connection is put, the oxygen-eliminating device 18 is connected with back-end ductwork device 4 and boiler body 2 respectively by feed pump, and coal feeder 1 is by coal
It is dosed in boiler body 2 and burns, the flue gas of burning can enters in cyclone separator 3, and the ashes to burn incompletely are through rotation
Wind separator 3 separates, and returns in boiler body 2 and burns away by 3 lower part of cyclone separator, the ashes of burning-up pass through boiler sheet
2 lower part of body discharges out of the furnace, and the high-temperature flue gas for generation of burning enters exhaust gas processing device after back-end ductwork device 4 and carries out dedusting
Be discharged into air after desulfurization, desalted water is carried out deoxygenation processing by oxygen-eliminating device 18 by heat exchange, and desalted water is heated to 100 DEG C
To after 120 DEG C, it is sent into back-end ductwork device 4 and is heated.
The coal feeder 1 includes coal bunker 5 and feeder 6, and 5 lower part of coal bunker is connected by feeder 6 with boiler body 2,
Coal in coal bunker 5 measures after broken, screening through feeder 6 to burn into stove, improves burning of coal efficiency.
The boiler body 2 includes burner hearth 7, drum 8, water cooled wind chamber 9, slag pipe 10, the drum 8, burner hearth 7, water cooling
Air compartment 9, slag pipe 10 are sequentially connected from top to bottom, 7 upper and lower part of burner hearth respectively with the top of cyclone separator 3 and under
Portion connects, and the ashes to burn incompletely enter through 7 top of burner hearth to be separated through cyclone separator 3, and by returning on cyclone separator
Glassware returns to burner hearth and burns away, and improves burning of coal efficiency, the ashes of burning-up are after burner hearth 7 enters water cooled wind chamber 9 under
Slag pipe 10 is discharged, and the water in drum 8 is flowed into membrane wall pipe through pipeline and heated, and produces steam water interface, then have back of pipeline
Into drum, and continue towards back-end ductwork device 4.
The back-end ductwork device 4 includes high temperature superheater 11, low temperature superheater 12, economizer 13, Secondary Air air preheater
14th, First air air preheater 15, primary air fan 23, overfire air fan 24, the high temperature superheater 11, low temperature superheater 12, economizer
13rd, Secondary Air air preheater 14, First air air preheater 15 are sequentially connected from top to bottom, the high temperature superheater 11 and cyclone separator
3 connections, described 15 one end of First air air preheater are connected with primary air fan 23, and the other end is connected with water cooled wind chamber 9, the Secondary Air
14 one end of air preheater is connected with overfire air fan 24, and the other end is connected with burner hearth 7, and described 13 one end of economizer connects with oxygen-eliminating device 18
Connect, the other end is connected with drum 8, and the low temperature superheater 12 is connected with drum 8, and high-temperature flue gas is through overwinding caused by burner hearth 7
After wind separator 3 by 4 top of back-end ductwork device enter, and successively with high temperature superheater 11, low temperature superheater 12, economizer
13rd, Secondary Air air preheater 14, First air air preheater 15 exchange heat, wherein, pass through high temperature superheater 11 and low temperature superheater 12
Vapor from drum 8 is carried out after being heated to 430 DEG C to 470 DEG C, sending to steam user, economizer 13 can will come from and remove
The desalted water of oxygen device 18 is preheated, and improves boiler thermal efficiency, First air air preheater 15 and Secondary Air air preheater 14 are respectively to coming
Heated from the air of primary air fan 23 and overfire air fan 24, improve boiler thermal efficiency.
The exhaust gas processing device includes electrostatic precipitator 16, grey storehouse 17, desulfurizing tower 19, phosphate ore pulp circulating slot 20, chimney
21, described 16 one end of electrostatic precipitator is connected with 4 lower part of back-end ductwork device, and the other end is connected by wind turbine and 19 lower part of desulfurizing tower
Connect, the lower part of electrostatic precipitator 16 is connected by defeated ash pump with grey storehouse 17, and the phosphate ore pulp circulating slot 20 is by circulating pump with taking off
Sulphur tower 19 connects, and 19 top of desulfurizing tower is connected with chimney 21, and high-temperature flue gas caused by burner hearth 7 passes through back-end ductwork device
4 exchanged heat after enter electrostatic precipitator 16 carry out electrostatic precipitation, the dust that electrostatic precipitator 16 is collected into pass through it is defeated ash pumping
It is uniformly processed to grey storehouse 17, the tail gas after dedusting is sent to 19 lower part of desulfurizing tower, phosphate ore pulp by wind turbine passes through circulation
Pump enter 19 top of desulfurizing tower, by being contacted with tail gas, absorption tail gas in sulfur dioxide and component, due in phosphate ore pulp
Containing metal ions such as magnesium ions, when reaction, can be catalyzed inferior sulfate radical and the oxygen reaction in air, generate sulfate radical, phosphorus ore
Slurry circulates between desulfurizing tower 19 and phosphate ore pulp circulating slot 20, constantly absorbs the sulfur dioxide in tail gas, and liquid phase is rich in phosphate ore pulp
After collecting a certain amount of sulfate radical, phosphate ore pulp is drawn from phosphate ore pulp circulating slot 20 by pipeline, then by supplementing part dilute sulfuric acid,
Magnesium elements and it is converted into magnesium sulfate in extraction phosphorus ore and is dissolved in liquid phase, in liquid phase after magnesium ion enrichment to a certain degree, solid-liquor separation, profit
It is raw material with phosphate ore pulp de-magging filtrate, additional ammonium hydroxide or ammonium hydrogen carbonate, prepare the high-quality accessory substance of ammonium magnesium phosphate.
Spray equipment is equipped with the desulfurizing tower 19, the spray equipment is connected with phosphate ore pulp circulating slot 20, spray equipment
From 19 top of desulfurizing tower to tail gas countercurrent spray washing absorption, the desulfuration efficiency of raising desulfurizing tower 19.
The system further includes material return blower 22, and the material return blower 22 is connected with cyclone separator 3, can by material return blower
It is fed again into the ashes that 3 bottom of cyclone separator burns incompletely in burner hearth 7, and oxygen is provided and improves efficiency of combustion.
Claims (7)
- A kind of 1. system of phosphate ore pulp processing boiler exhaust gas coproduction ammonium magnesium phosphate, it is characterised in that：Including coal feeder (1), pot Furnace body (2), back-end ductwork device (4), exhaust gas processing device, oxygen-eliminating device (18), the coal feeder (1) and boiler body (2) connect, the boiler body (2) is connected by cyclone separator (3) with back-end ductwork device (4), the back-end ductwork dress The lower part for putting (4) is connected with exhaust gas processing device, the oxygen-eliminating device (18) by feed pump respectively with back-end ductwork device (4) and Boiler body (2) connects.
- A kind of 2. system of phosphate ore pulp processing boiler exhaust gas coproduction ammonium magnesium phosphate according to claim 1, it is characterised in that： The coal feeder (1) includes coal bunker (5) and feeder (6), and coal bunker (5) lower part is connected by feeder (6) and boiler body (2) Connect.
- A kind of 3. system of phosphate ore pulp processing boiler exhaust gas coproduction ammonium magnesium phosphate according to claim 1, it is characterised in that： The boiler body (2) includes burner hearth (7), drum (8), water cooled wind chamber (9), slag pipe (10)；The drum (8), burner hearth (7), water cooled wind chamber (9), slag pipe (10) are sequentially connected from top to bottom；Burner hearth (7) upper and lower part is divided with whirlwind respectively Upper and lower part from device (3) connects.
- 4. a kind of system of phosphate ore pulp processing boiler exhaust gas coproduction ammonium magnesium phosphate according to claim 1 or 3, its feature exist In：It is empty pre- that the back-end ductwork device (4) includes high temperature superheater (11), low temperature superheater (12), economizer (13), Secondary Air Device (14), First air air preheater (15), primary air fan (23), overfire air fan (24), the high temperature superheater (11), cryogenic overheating Device (12), economizer (13), Secondary Air air preheater (14), First air air preheater (15) are sequentially connected from top to bottom, the high temperature Superheater (11) is connected with cyclone separator (3)；Described First air air preheater (15) one end is connected with primary air fan (23), another End is connected with water cooled wind chamber (9)；Described Secondary Air air preheater (14) one end is connected with overfire air fan (24), the other end and burner hearth (7) connect；Described economizer (13) one end is connected with oxygen-eliminating device (18), and the other end is connected with drum (8)；The low temperature superheater (12) it is connected with drum (8).
- A kind of 5. system of phosphate ore pulp processing boiler exhaust gas coproduction ammonium magnesium phosphate according to claim 1, it is characterised in that： The exhaust gas processing device includes electrostatic precipitator (16), grey storehouse (17), desulfurizing tower (19), phosphate ore pulp circulating slot (20), chimney (21), described electrostatic precipitator (16) one end is connected with back-end ductwork device (4) lower part, and the other end passes through wind turbine and desulfurizing tower (19) lower part connects, and the lower part of electrostatic precipitator (16) is connected by defeated ash pump with grey storehouse (17)；The phosphate ore pulp circulating slot (20) it is connected by circulating pump with desulfurizing tower (19)；Desulfurizing tower (19) top is connected with chimney (21).
- A kind of 6. system of phosphate ore pulp processing boiler exhaust gas coproduction ammonium magnesium phosphate according to claim 5, it is characterised in that： Spray equipment is equipped with the desulfurizing tower (19), the spray equipment is connected with phosphate ore pulp circulating slot (20).
- A kind of 7. system of phosphate ore pulp processing boiler exhaust gas coproduction ammonium magnesium phosphate according to claim 1, it is characterised in that： Material return blower (22) is further included, the material return blower (22) is connected with cyclone separator (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721282824.8U CN207365049U (en) | 2017-09-30 | 2017-09-30 | A kind of system of phosphate ore pulp processing boiler exhaust gas coproduction ammonium magnesium phosphate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721282824.8U CN207365049U (en) | 2017-09-30 | 2017-09-30 | A kind of system of phosphate ore pulp processing boiler exhaust gas coproduction ammonium magnesium phosphate |
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| CN207365049U true CN207365049U (en) | 2018-05-15 |
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| CN201721282824.8U Expired - Fee Related CN207365049U (en) | 2017-09-30 | 2017-09-30 | A kind of system of phosphate ore pulp processing boiler exhaust gas coproduction ammonium magnesium phosphate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108105760A (en) * | 2017-11-17 | 2018-06-01 | 贵阳开磷化肥有限公司 | A kind of method of fire coal circulating fluid bed boiler exhaust gas phosphate ore pulp desulfurization co-production ammonium magnesium phosphate |
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2017
- 2017-09-30 CN CN201721282824.8U patent/CN207365049U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108105760A (en) * | 2017-11-17 | 2018-06-01 | 贵阳开磷化肥有限公司 | A kind of method of fire coal circulating fluid bed boiler exhaust gas phosphate ore pulp desulfurization co-production ammonium magnesium phosphate |
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Granted publication date: 20180515 Termination date: 20210930 |