CN201809170U - Production equipment of phosphoric acid adopting reflection kiln method - Google Patents
Production equipment of phosphoric acid adopting reflection kiln method Download PDFInfo
- Publication number
- CN201809170U CN201809170U CN2010201371877U CN201020137187U CN201809170U CN 201809170 U CN201809170 U CN 201809170U CN 2010201371877 U CN2010201371877 U CN 2010201371877U CN 201020137187 U CN201020137187 U CN 201020137187U CN 201809170 U CN201809170 U CN 201809170U
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- CN
- China
- Prior art keywords
- kiln
- phosphoric acid
- yellow phosphorus
- reflecting
- burning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 26
- 229910000147 aluminium phosphate Inorganic materials 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims description 23
- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000036571 hydration Effects 0.000 claims abstract description 4
- 238000006703 hydration reaction Methods 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 4
- 239000011449 brick Substances 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- MHKWSJBPFXBFMX-UHFFFAOYSA-N iron magnesium Chemical compound [Mg].[Fe] MHKWSJBPFXBFMX-UHFFFAOYSA-N 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 239000003546 flue gas Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 claims 1
- 239000008188 pellet Substances 0.000 abstract description 18
- 238000006243 chemical reaction Methods 0.000 abstract description 17
- 150000001875 compounds Chemical class 0.000 abstract description 17
- 238000006722 reduction reaction Methods 0.000 abstract description 15
- 230000009467 reduction Effects 0.000 abstract description 10
- 238000007254 oxidation reaction Methods 0.000 abstract description 9
- 239000003245 coal Substances 0.000 abstract description 7
- 230000003647 oxidation Effects 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 239000002367 phosphate rock Substances 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- 229910019142 PO4 Inorganic materials 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract description 2
- 239000010452 phosphate Substances 0.000 abstract description 2
- 229910017053 inorganic salt Inorganic materials 0.000 abstract 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000007363 ring formation reaction Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 238000013467 fragmentation Methods 0.000 description 3
- 238000006062 fragmentation reaction Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 239000003610 charcoal Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The utility model belongs to the technical field of inorganic salt industry, and relates to a new technique which adopts medium-low grade phosphate ore and yellow phosphorus as raw materials and adopts a reduction and oxidation method for preparing phosphoric acid directly. The technique is as follows: a dry chain grate machine is used for adding reaction material (namely, compound pellets) quantitatively to a reflection kiln, the yellow phosphorus is adopted to replace coal for burning and heating, the heat is transferred to the compound pellets by a reflecting mode, reduction reaction occurs on the compound pellets, P4 precipitates the compound pellets and is oxidized into P2O5 kiln gas which is introduced into a hydration tower, and high-purity phosphoric acid is obtained by procedures of purifying and the like. The method uses the yellow phosphorus to replace the coal for burning, heating the reacting pellets to provide heat for reducing P4 steam from phosphorite, furthest realizes comprehensive utilization of the heat generated by burning the yellow phosphorus, saves the energy, and greatly reduces the cost; no looping exists in the kiln, the reaction rate is high, the equipment structure is simple, the volume is smaller and the operation and the maintenance are convenient.
Description
Technical field
The utility model belongs to the phosphoric acid production technical field of inorganic chemicals industry, is a kind ofly to be raw material, to take the reduction-oxidation method to make the Technology of phosphoric acid with mid low grade phosphate rock stone.
Background technology
China's energy starved situation is quite severe, and saving the energy has become the urgent task that we face.Wherein, phosphate rock resource is through the exploitation of many decades, high-grade ore seldom, the domestic ore that can be directly used in Wet-process Phosphoric Acid Production remains little; In the remaining overwhelming majority high impurity content, low-grade phosphate ore, exploitation and utilize all unusual difficulty is particularly for the phosphoric acid industry.
Therefore, the eighties in last century, U.S. Occidental Petroleum research company has developed a kind of novel process for preparing industrial phosphoric acid---kiln-process phosphoric acid, but this research is owing to exist the industrialization of being unrealized of reaction engineering technical problem always.On the domestic technique personnel research basis abroad, develop a lot of new kiln-process phosphoric acid production methods:
1, rotary kiln: this is a kind of heavy duty, high pulling torque, many fulcrums, tubular hollow kiln operational system, and spherical material moves along with the rotation of kiln body in kiln; The reduction of phosphorus is carried out in the reduction zone, P
4Oxidation carry out in oxidation zone, all in the kiln body, fuel is at kiln internal combustion direct heating for reduction zone and oxidation zone.This technology has a lot of weak points: do not consider the separation of oxidation zone and reduction zone, the reduction charcoal in the material is easily oxidized and early right phenomenon occurs, so the charcoal consumption is big, influences the reduction of phosphorus simultaneously; The ring formation phenomenon is serious in the rotary kiln in addition, influences the normal operation of kiln and is difficult to realize suitability for industrialized production.
2, tunnel furnace: this is a long linear pattern tunnel, and fixed wall and arch (putting down) top are arranged at its both sides and top, are moving kiln car on the track that lay the bottom, and combustion equipment is located at the both sides, middle part of tunnel furnace; Employing is burnt till material every cigarette or flaming and is placed on the kiln car, through preheating zone, thermal zone and cooling zone; Though this technology has solved the roll problems such as broken and ring formation of material in kiln, but also there is the effective isolated problem in oxidation zone and reduction zone, have also simultaneously that equipment volume is huge, mechanization degree is low, production process complexity, reduction reaction time are long, reduction ratio is low, the difficult problem that realizes that large industrialized is produced.
3, Kun road kiln: this be the tunnel furnace technology a kind of improvement, though shorten with respect to the tunnel furnace phosphorus ore reaction times, level of automation improves, but still exists bulkyly, becomes product process complicated problems.
4, ring end kiln: ring end kiln complex structure, the betting contest phenomenon takes place down in complex operation, high temperature easily.
5, the patent No. provides a kind of shaft furnace method for the patent of ZL200920081113.3, though this kiln method is simple in structure, oxidation zone and reduction zone can be isolated effectively, the utilization of ring formation, heat is more unreasonable in the kiln, but because this equipment erects, and than higher (20 meters), so be easy to shaping raw material is caused fragmentation, therefore reactivity and resource utilization reduce.
Above method is all used the coal heat release of burning, and does not have to utilize more the burning heat release of phosphorus.
Summary of the invention
The utility model is at the deficiencies in the prior art, a kind of reflecting kiln method production unit of phosphoric acid is proposed, producing phosphoric acid with this phosphoric acid novel production device is to adopt yellow phosphorus instead of part coal burning, save energy, realize the comprehensive utilization of the energy in phosphoric acid production to greatest extent, greatly reduced production cost.There is not the ring formation phenomenon in this equipment reaction rate height in the kiln, device structure is simple, and volume is little, and less investment is easy to operate.
The utility model provides a kind of reflecting kiln method production unit of phosphoric acid, and its reflecting kiln primary structure comprises 1, fire door; 2, charging opening; 3, P
2O
5Outlet; 4, slag-drip opening; 5, yellow phosphorus inlet; 6, gas inlet.Magnesia brick lining in the kiln wall adopts; Arch formula top, liner silica brick are adopted in the kiln top; Form with the magnesium iron sand sintering at the bottom of the kiln.Principle of work is that at first yellow phosphorus enters the reflecting kiln burning through yellow phosphorus inlet 5, and heat reflects to compound pellet by Yao Ding, kiln wall and red-hot gas, reduction reaction takes place in the compound pellet generate P
4Steam, P
4Steam is separated out in compound pellet, and in kiln oxidizing reaction takes place, and generates P
2O
5, introduce the hydration tower through induced draft fan then; The heat that oxidizing reaction produces also reflects to compound pellet by Yao Ding, kiln wall and red-hot air; Compound residual ball warp is crossed after the reaction, and smaller volume is discharged from slag-drip opening 4.
The utility model provides a kind of reflecting kiln method production unit of phosphoric acid, and its new production process is as follows:
Rock Phosphate (72Min BPL), silica, 3 kinds of raw materials of coke are measured on request, become by 200 purpose fine powders through fragmentation, grinding then, add binding agent again, use bowl granulator balling-up (the about 15mm of diameter) then through the densification of profit mill.Simultaneously, coating agent (coal and fusing point are adjusted agent) also adds binding agent behind ball milling fine and close through the profit mill again, is wrapped in above-mentioned pellet surface with another pan-type pelletizer, makes compound pellet.Compound pellet is sent into the drying grate utilization and is cooled off the warm air that residual ball obtains and carry out drying and preheating, and hot-bulb enters reflecting kiln, carries out reduction reaction at this spherolite, carries out oxidizing reaction in the kiln.
Reaction principle is as follows:
In the compound pellet:
Ca
10(PO
4)
6F
2+15C+9SiO
2→3/2P
4+15CO+9CaO·SiO
2+CaF
2 (1)
ΔH＝28006kJ/kg(P
4)
In the reflecting kiln:
P
4+5O
2→2P
2O
5 (2)
ΔH＝-25498kJ/kg(P
4)
CO+1/2O
2→2CO
2 (3)
ΔH＝-22154kJ/kg(P
4)
In the above-mentioned reaction, reaction (2) (3) liberated heat satisfies the heat that reaction (1) is absorbed widely, so reaction (1) can be carried out constantly.
Reflecting kiln generates and contains P
2O
5Kiln gas import hydrated tower, promptly get highly purified phosphoric acid through operations such as purifications.The residual spherolite in reaction back enters drying grate and blasts air cooling, and warm air then imports dry drying grate and reflecting kiln uses.
The utility model adopts a kind of reflecting kiln method production unit of phosphoric acid, and this production unit combines thermal phosphoric acid with the kiln-process phosphoric acid production principle, and its advantage is as follows:
1, in the reflecting kiln described in the utility model, adopt yellow phosphorus instead of part coal burning, save energy has realized the comprehensive utilization of the energy in phosphoric acid production to greatest extent, greatly reduces production cost.
2, the utility model adopts yellow phosphorus burning heating compound pellet, replaces traditional coal combustion heating method, has realized the comprehensive utilization of the energy, has saved cost, has also guaranteed quality simultaneously.
3, reflecting kiln described in the utility model, heat is to pass to compound pellet by reflection way, so compound pellet is heated evenly, reacts completely, and has realized making full use of of heat.
4, reflecting kiln described in the utility model does not rotate, and does not have the ring formation phenomenon, simultaneously because the distance at the bottom of dog-house and the kiln is not high, so there is not the phenomenon of compound pellet fragmentation.
5, reflecting kiln described in the utility model, it is simple in structure, and volume is little, operates simple and easy, easy to maintenance
Description of drawings
Fig. 1 is the utility model kiln-process phosphoric acid production unit one reflecting kiln structural representation
Fig. 2 is the side-view of Fig. 1
Fig. 3 is the utility model process flow sheet
Embodiment
Earlier with phosphorus ore (28%), silica, coke 10: 7: 3 in proportion, through fine powder broken, that grinding becomes; Get the 200kg fine powder, add binding agent, become compound pellet with bowl granulator then, the about 15mm of diameter through the densification of profit mill.With the drying grate preheating and send in the reflecting kiln; Yellow phosphorus 10kg spontaneous combustion in reflecting kiln in the yellow phosphorus burning device progressively rises to about 1200 ℃ kiln temperature; The reduction reaction takes place in the reaction spherolite under this temperature, and separates out P
4Steam, 1.5 hours reaction times; Reacting residual ball warp slag-drip opening discharges; P
4Oxidizing reaction takes place rapidly in steam in oxidation zone, kiln gas is from P
2O
5Outlet enters the hydration tower, after operations such as purification promptly get the highly purified phosphoric acid of 120kg (85%), the yield of phosphorus reaches 95%, stable equipment operation in the reaction process.
Claims (2)
1. the reflecting kiln method production unit of a phosphoric acid is characterized in that the reflecting kiln primary structure comprises kiln body and accessory structure, magnesia brick lining in the kiln wall of said kiln body adopts, and arch formula top, liner silica brick are adopted in the kiln top, form with the magnesium iron sand sintering at the bottom of the kiln; Said accessory structure comprises fire door, charging opening, P
2O
5Flue gas discharge opening, a plurality of slag-drip opening, yellow phosphorus inlet, gas inlet.
2. reflecting kiln method production unit according to claim 1 is characterized in that reflecting kiln is connected with hydration tower, induced draft fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201371877U CN201809170U (en) | 2010-03-22 | 2010-03-22 | Production equipment of phosphoric acid adopting reflection kiln method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201371877U CN201809170U (en) | 2010-03-22 | 2010-03-22 | Production equipment of phosphoric acid adopting reflection kiln method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201809170U true CN201809170U (en) | 2011-04-27 |
Family
ID=43892109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201371877U Expired - Lifetime CN201809170U (en) | 2010-03-22 | 2010-03-22 | Production equipment of phosphoric acid adopting reflection kiln method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201809170U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109775677A (en) * | 2017-11-10 | 2019-05-21 | 广西越洋科技股份有限公司 | A method of production phosphoric acid is combined with shaft kiln using reverberatory furnace |
-
2010
- 2010-03-22 CN CN2010201371877U patent/CN201809170U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109775677A (en) * | 2017-11-10 | 2019-05-21 | 广西越洋科技股份有限公司 | A method of production phosphoric acid is combined with shaft kiln using reverberatory furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUANGXI SINO-LINCHEM INDUSTRIAL GROUP CO., LTD. Free format text: FORMER NAME: GUANGXI SINO-LINCHEM CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 530022 the Guangxi Zhuang Autonomous Region Nanning Qingxiu District Cambodia Road No. 9 Sea Asia international 4 Building No. 4-1601 Patentee after: Sino-Linchem Co., Ltd. Address before: 530022 the Guangxi Zhuang Autonomous Region Nanning Jin Pu Road 16 East International E building 22 room 2209 Patentee before: Sino-Linchem Co., Ltd. |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: FANGCHENGGANG BOSEN CHEMICAL TECHNOLOGY CO., LTD. Assignor: Sino-Linchem Co., Ltd. Contract record no.: 2015450000046 Denomination of utility model: Production equipment of phosphoric acid adopting reflection kiln method Granted publication date: 20110427 License type: Exclusive License Record date: 20150916 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Production equipment of phosphoric acid adopting reflection kiln method Effective date of registration: 20160509 Granted publication date: 20110427 Pledgee: Pudong Shanghai Development Bank Limited by Share Ltd Nanning branch Pledgor: Guangxi Yueyang Technology Co., Ltd.|Guangxi Yueyang Chemical Industry Group Co., Ltd Registration number: 2016450000003 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20170828 Granted publication date: 20110427 Pledgee: Pudong Shanghai Development Bank Limited by Share Ltd Nanning branch Pledgor: SINO-LINCHEM INTERNATIONAL, LNC.|Sino-Linchem Co., Ltd. Registration number: 2016450000003 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20180808 Granted publication date: 20110427 |
|
| PP01 | Preservation of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110427 |
|
| CX01 | Expiry of patent term |