CN201125164Y - Apparatus for producing phosphoric acid by carbothermy - Google Patents
Apparatus for producing phosphoric acid by carbothermy Download PDFInfo
- Publication number
- CN201125164Y CN201125164Y CNU2007201051260U CN200720105126U CN201125164Y CN 201125164 Y CN201125164 Y CN 201125164Y CN U2007201051260 U CNU2007201051260 U CN U2007201051260U CN 200720105126 U CN200720105126 U CN 200720105126U CN 201125164 Y CN201125164 Y CN 201125164Y
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- oxidizing
- phosphoric acid
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Abstract
Phosphoric acid manufacturing equipment by the carbothermal method belongs to the technology field of phosphoric acid manufacturing equipment. A vertical preheating passage provided with a feeding device is arranged at the upper part of the tank body of a vertical tank; the cavity between the inner wall of the tank body and the preheating passage is an oxidizing chamber; the oxidizing chamber is provided with an air inlet and an oxidizing gas outlet; the middle part of the tank body is a reducing chamber; the reducing chamber communicates with the preheating passage and the oxidizing chamber; the reducing chamber is surrounded by four or more fuel combustion chambers and communicates with each of the fuel combustion chambers; a remaining carbon combustion chamber with a hot air inlet is arranged below the reducing chamber; a cooling chamber with a slagging device is arranged at the lowermost part of the tank body. The manufacturing equipment has the advantages of simple structure, low investment of the vertical tank compared with a rotary kiln, no movable operating structure, greatly reduced fault, better reducing conditions compared with the rotary kiln, easily improved reducing temperature, easy control, low remaining phosphor in slag, high phosphor recovery rate and low production cost. Furthermore, phosphorite of middle and low grades can be utilized to produce high quality Phosphoric acid; the discharged waste residue can be used as the material for producing cement, thereby helping protect the environment and improve economic benefits.
Description
Technical field
The utility model belongs to the phosphoric acid production equipment technical field.
Background technology
The production of thermal phosphoric acid mainly contains electric furnace yellow phosphorus at present and burns acid system phosphoric acid and kiln-process phosphoric acid.The phosphoric acid cost height that electric furnace yellow phosphorus burns till but quality is good.The production of kiln-process phosphoric acid mainly contains two kinds of tunnel furnace method and rotary kiln methods.Tunnel furnace method is produced the phosphate equipment investment greatly, and the complexity of operating and get the raw materials ready is representative with development area, Yichang City three new phosphorous chemical industry.The rotary kiln method is produced phosphoric acid, though facility investment a little less than tunnel furnace, drops into also big.The reduction reaction of rotary kiln method and oxidizing reaction can not be well-separated, in order to solve in the kiln Vanadium Pentoxide in FLAKES and the reaction problem of going into calcium in the cold raw material of stove in the high-temperature furnace gas, equipment constitutes complicated, though and through taking measures such as a balling-up, twice parcel, do not tackle the problem at its root incompatible big suitability for industrialized production yet.The Chinese patent ZL200620019649.9 of applicant " the phosphorus ore carbothermy is produced the specific equipment of phosphoric acid " produces a lot of problems that phosphoric acid exists though fundamentally solved rotary kiln, but trial production also exposes some shortcomings in secular: the rotary kiln investment is big, the kiln afterbody at high temperature seals difficulty, raw material after preheating, temperature height, feeder equipment are difficult to bear and work long hours.
The utility model content
The purpose of this utility model is the shortcoming that overcomes prior art, and a kind of carbothermy phosphoric acid production equipment of big suitability for industrialized production kiln-process phosphoric acid is provided, and this device structure is simple, durable, invest little, available mid low grade phosphate rock is produced phosphoric acid, and production cost is low, the reduction ratio height.
Structure of the present utility model: carbothermy phosphoric acid production equipment is a vertical tank, wherein:
The tank body internal upper part is established a vertical preheating channel, and the cavity between inner tank wall and the preheating channel is an oxidizing chamber, and feeding unit is established at the preheating channel top, and oxidizing chamber is established air intlet and oxidizing gas outlet;
The middle part is the reduction chamber in the tank body, upper end, reduction chamber all is docked and connected with preheating channel and oxidizing chamber, the reduction chamber is surrounded by four or more gas combustion chamber, and the reduction chamber all is communicated with each gas combustion chamber, and each gas combustion chamber establishes combustion gas and hot blast import;
Reduction is established surplus charcoal combustion chamber below the chamber, and upper end, surplus charcoal combustion chamber is docked and connected with the reduction chamber, and the hot blast import is established in surplus charcoal combustion chamber;
Foot is a cooling room in the tank body, and the cooling room upper end is docked and connected with bottom, surplus charcoal combustion chamber, and slag discharging device is established in the cooling room lower end.
Said feeding unit and slag discharging device all belong to prior art.The cross section of reduction chamber can be circle or rectangle.Cooling room is outer can be with watercooling jacket.
When the utility model used, the outlet of the oxidizing gas of oxidizing chamber was connected with peripheral units such as the conventional equipment interchanger that belongs to prior art, condensing works, cleaning apparatus, hydrated tower, mist eliminators, carried out heat exchange and phosphoric acid and collected.
Working process of the present utility model: ground phosphate rock, ground silica and powdered carbon mix with caking agent, water to be mixed all, is pressed into nodulizing, drying, and behind the close-burning, raw material enters preheating channel by the feeding unit at preheating channel top, is preheated and descends to enter the reduction chamber.Do not contact raw material at this moment, do not have the pre-ignition problem of charcoal of wherein reducing with oxygen-containing gas.Raw material further is warming up to reduction reaction temperature in the reduction chamber, and the phosphorus gas of effusion rises and enters oxidizing chamber, carries out oxidizing fire with the air that enters oxidizing chamber, the raw material in the combustion heat heating preheating channel.Furnace gas behind the oxidizing fire still has higher heat, enters the conventional equipment interchanger through the outlet of the oxidizing gas of oxidizing chamber, the cold wind that blasts is carried out heat exchange heat up.The gained hot blast is mainly supplied with gas combustion chamber and surplus charcoal combustion chamber, also can have part to supply with oxidizing chamber.Furnace gas after the interchanger heat exchange enters hydrated tower through cooling, dedusting, and Vanadium Pentoxide in FLAKES and hydrate in the furnace gas get phosphoric acid.Contain a large amount of unreacted surplus charcoals in the nodulizing slag after reduction reaction, move up into surplus charcoal combustion chamber down, the surplus charcoal of pyritous burns at this, and the air quantity that may command enters surplus charcoal combustion chamber to be obtaining a large amount of carbon monoxide, reduces indoor reducing atmosphere thereby can improve; The heat that surplus charcoal burning generates can improve the reduction chambers temp.Recrement after the burning is discharged through slag discharging device.
The beneficial effects of the utility model: device structure is simple, and the input ratio rotary kiln of vertical tank is much lower, does not have movable running structure, and fault significantly reduces.Reductive condition is better than rotary kiln, and reduction temperature improves easily, is convenient to control, phosphorus in the slag is residual low, the rate of recovery height of phosphorus, and low-grade phosphorus ore is produced high quality phosphoric acid in utilizing, production cost is low, and institute's waste discharge slag can be used as the raw material of producing cement, helps environmental protection and increases economic efficiency.
Description of drawings
Accompanying drawing is looked cross-sectional view for the master of embodiment.
Embodiment
See embodiment shown in the drawings: the vertical tank shell is made by steel plate, inner lining refractory.Vertical preheating channel 1 is located at the tank body internal upper part.Oxidizing chamber 2 is the cavity between inner tank wall and the preheating channel 1.3 is the salable feeding unit at preheating channel 1 top.4 is the air intlet of oxidizing chamber 2, and 5 is the oxidizing gas outlet of oxidizing chamber 2.The cross section is docked and connected for circular 6 upper ends, reduction chamber and preheating channel 1 and oxidizing chamber 2.Have four gas combustion chamber 7 and surround reduction chamber 6, reduction chamber 6 all is communicated with each gas combustion chamber 7.8 is the combustion gas and the hot blast import of gas combustion chamber 7.9 upper ends, surplus charcoal combustion chamber are docked and connected with reduction chamber 6.10 is the hot blast import of surplus charcoal combustion chamber 9.Cooling room 11 is positioned at the tank body foot.Cooling room 11 upper ends and 9 bottoms, surplus charcoal combustion chamber are docked and connected.12 is the slag discharging device of cooling room 11 lower ends.The cooling room 11 outer watercooling jackets 13 that are with.Use this device fabrication carbothermy phosphoric acid, the reduction ratio of phosphorus can use low silicon ingredient greater than 95% in the raw material, has improved the result of use of slag.
Above embodiment is only for the utility model is described in further detail, and scope of the present utility model is not subjected to the limitation of illustrated embodiment.
Claims (3)
1, a kind of carbothermy phosphoric acid production equipment, it is characterized in that: equipment is a vertical tank, wherein:
The tank body internal upper part is established a vertical preheating channel, and the cavity between inner tank wall and the preheating channel is an oxidizing chamber, and feeding unit is established at the preheating channel top, and oxidizing chamber is established air intlet and oxidizing gas outlet;
The middle part is the reduction chamber in the tank body, upper end, reduction chamber all is docked and connected with preheating channel and oxidizing chamber, the reduction chamber is surrounded by four or more gas combustion chamber, and the reduction chamber all is communicated with each gas combustion chamber, and each gas combustion chamber establishes combustion gas and hot blast import;
Reduction is established surplus charcoal combustion chamber below the chamber, and upper end, surplus charcoal combustion chamber is docked and connected with the reduction chamber, and the hot blast import is established in surplus charcoal combustion chamber;
Foot is a cooling room in the tank body, and the cooling room upper end is docked and connected with bottom, surplus charcoal combustion chamber, and slag discharging device is established in the cooling room lower end.
2, as the said production unit of claim 1, it is characterized in that: cooling room is with watercooling jacket outward.
3, as the said production unit of claim 1, it is characterized in that: have four gas combustion chamber and surround the reduction chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201051260U CN201125164Y (en) | 2007-11-06 | 2007-11-06 | Apparatus for producing phosphoric acid by carbothermy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201051260U CN201125164Y (en) | 2007-11-06 | 2007-11-06 | Apparatus for producing phosphoric acid by carbothermy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201125164Y true CN201125164Y (en) | 2008-10-01 |
Family
ID=39998582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201051260U Expired - Fee Related CN201125164Y (en) | 2007-11-06 | 2007-11-06 | Apparatus for producing phosphoric acid by carbothermy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201125164Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010025620A1 (en) * | 2008-09-03 | 2010-03-11 | 湖北三新磷酸有限公司 | Method and device for producing yellow phosphorus or phosphoric acid by vertical airtight smoke-baffle kiln |
-
2007
- 2007-11-06 CN CNU2007201051260U patent/CN201125164Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010025620A1 (en) * | 2008-09-03 | 2010-03-11 | 湖北三新磷酸有限公司 | Method and device for producing yellow phosphorus or phosphoric acid by vertical airtight smoke-baffle kiln |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081001 Termination date: 20111106 |