CN101118116B - Novel industrialization multi-channel type pushed-bat kiln for directly preparing phosphoric acid with phosphate ore - Google Patents
Novel industrialization multi-channel type pushed-bat kiln for directly preparing phosphoric acid with phosphate ore Download PDFInfo
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- CN101118116B CN101118116B CN2007100532323A CN200710053232A CN101118116B CN 101118116 B CN101118116 B CN 101118116B CN 2007100532323 A CN2007100532323 A CN 2007100532323A CN 200710053232 A CN200710053232 A CN 200710053232A CN 101118116 B CN101118116 B CN 101118116B
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- kiln
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- phosphoric acid
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The present invention relates to a novel industrialized multi-channel pushing kiln for making phosphoric acid directly with phosphorite, the kiln comprises a kiln body. A product channel, a kiln gas channel and a fuel channel are arranged in the inner cavity of the kiln body, a baffle plate is arranged between the product channel and the kiln gas channel, a pushing padding plate is also arranged in the product channel. Compared with the general tunnel kiln, the present invention divides the channel into a plurality of small channels, uses the pushing padding plate to move the product, makes heat resources distributed in all the product channels, the present invention greatly improves the thermal efficiency and reduces the energy consumption.
Description
Technical field
The present invention relates to a kind of new industrialization multi-channel type pushed-bat kiln with directly preparing phosphoric acid with phosphate ore.
Background technology
Kiln-process phosphoric acid develops so far, and its main reactor has only two kinds: (1) rotary kiln: be a kind of roller hollow kiln, 3-5 ° of inclination angle arranged, spherical goods move the reduction of phosphorus and P along with the rotation of kiln body in kiln
4Oxidation carry out at the same section of kiln, fuel is sprayed into burner by the kiln tail; Contain P
2O
5Gas and pellet countercurrent flow, tailings is drawn off by the kiln tail, uses the cold air heat exchange, be used for combustion-supporting or the oven dry pellet; (2) tunnel cave: generally be a long linear pattern tunnel, fixing wall and vault are arranged at its both sides and top, are moving kiln car on the track that lay the bottom, and combustion apparatus is located at the both sides, middle part of tunnel cave; Material is placed on the kiln car, and through preheating zone, high temperate zone and salband, its principle is identical with rotary kiln.Rotary kiln and the tunnel cave burning, the reduction reaction of goods, the oxidizing fire of phosphorus of fuel are in process of production finished in a space, can not separate and delay the reduction and the combustion process of phosphorus, and the thermal efficiency is not high.
Summary of the invention
The purpose of this invention is to provide the new-type reactor-industrialization multi-channel type pushed-bat kiln in the kiln-process phosphoric acid production.The oxidizing fire of the reduction reaction of the burning of fuel, goods, phosphorus is divided into two or three functional areas to the burning of kiln, reduction, oxidation reaction with special furnace construction, effectively separates and delay the reduction and the combustion process of phosphorus.Simultaneously product channel is divided into a plurality of passage aisles, utilizes the promotion backing plate to come mobile goods, improved the thermal efficiency.
The object of the present invention is achieved like this: a kind of new industrialization multi-channel type pushed-bat kiln with directly preparing phosphoric acid with phosphate ore, comprise kiln body 1, the inner chamber of kiln body 1 is provided with product channel 2, kiln gas passage 3 and fuel combustion passage 4, separate by dividing plate 5 between product channel 2, the kiln gas passage 3, also be provided with in the product channel 2 and promote backing plate 8.Dividing plate 5 is provided with passage 6.Dividing plate 5 is for recrystallization or sintered silicon carbon matter, mullite, aluminium oxide, silica, fused alumina zirconia or other is through antiseptic refractory material.Be provided with flame shield 7 in the fuel combustion passage 4.
New industrialization multi-channel type pushed-bat kiln with directly preparing phosphoric acid with phosphate ore provided by the present invention, compare with general tunnel cave, product channel is divided into a plurality of passage aisles, utilize the promotion backing plate to move goods, the thermal source cross-distribution is between each product channel, greatly improve the thermal efficiency, reduced energy consumption.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
The present invention adopts following structure: a kind of new industrialization multi-channel type pushed-bat kiln with directly preparing phosphoric acid with phosphate ore, comprise kiln body 1, the inner chamber of kiln body 1 is provided with product channel 2, kiln gas passage 3 and fuel combustion passage 4, separate by dividing plate 5 between product channel 2, the kiln gas passage 3, also be provided with in the product channel 2 and promote backing plate 8.Dividing plate 5 is provided with passage 6.Dividing plate 5 is for recrystallization or sintered silicon carbon matter, mullite, aluminium oxide, silica, fused alumina zirconia or other is through antiseptic refractory material.Be provided with flame shield 7 in the fuel combustion passage 4.
Pushed bat kiln structural principle of the present invention is as follows:
This pushed bat kiln is 1.5 * 2.0 * 40 meters a multi-channel type pushed-bat kiln, product channel is divided into 3 * 3 layouts, product channel forms two kiln gas passages 3 by dividing plate 5 longitudinal subdivisions of recrystallized silicon carbide material, and fuel combustion passage 4 is distributed in product channel 2 and kiln gas passage 3 peripheries.Promote backing plate 8 and flue smoke baffle plate 5 and all use recrystallized silicon carbide, also can select mullite, aluminium oxide, silica, fused alumina zirconia or the antiseptic refractory material of other process for use.
The goods that prepare according to the kiln-process phosphoric acid mode, through be pressed into 240 * 112 * 53 standard brick behind the grinding with 1100 tons of full automatic presses, loading on the backing plate 8 from kiln hood after the dry kiln drying, push in the multi-channel type pushed-bat kiln with hydraulic pressure pusher or mechanically-propelled machine, from the preheating zone, high temperate zone, move to salband; Multiple spot is established passage 6 between high temperate zone 1300-1500 ℃, the P that makes generation
4Escape into kiln gas passage 3 with CO from the hole, multiple spot feeds oxygen-enriched air and makes P in kiln gas passage 3
4With the CO burning, the heat of release returns goods by the siliceous dividing plate radiation of carbonization, contains P after the burning
2O
5Gas and goods adverse current take out every any point behind high temperate zone after the cigarette heat exchange, this example select the 400 ℃ of somes taking-ups in preheating zone enter the hydration tower with recycle acid absorb phosphoric acid.
Goods are through over-quenching, and kiln discharge is the fired brick goods after the slow cooling.
Industrial nitrogen more than 95% blasts in the kiln from the quench zone (700-1300 ℃) of kiln tail.Any point is established neutral point between 300 ℃-1100 ℃ in the preheating zone, before the neutral point gas product channel from after discharge by kiln hood forward.Squeeze into inert gas at chilling band quench zone, make air curtain, block anterior P as nitrogen
4Do not flow to salband with CO gas, quench air does not enter the high temperature clinkering zone.The nitrogen air curtain that quench zone blasts blocks P
4And CO, a part is after the high temperature section heat exchange and a large amount of P that produce
4Enter the phosphorus burning gallery together with CO; A part with slow cooling wind backward ℃ of-200 ℃ sections of following current to 150 extract out and be used for oven dry.
Utilize multi-channel type pushed-bat kiln to carry out kiln-process phosphoric acid production as main reactor, compare with the conventional tunnel kiln, gas consumption has reduced about 70%, and the system fan installed capacity has reduced by 30%, receive acid system gas treatment amount reduced about 25%, SO in the product quality
4 2-Content has reduced more than 75%, P
2O
5Yield has improved 2.5%, and product cost has reduced about 25%-30%.
Claims (3)
1. new industrialization multi-channel type pushed-bat kiln with directly preparing phosphoric acid with phosphate ore, comprise kiln body (1), it is characterized in that: the inner chamber of kiln body (1) is provided with product channel (2), kiln gas passage (3) and fuel combustion passage (4), separate by dividing plate (5) between product channel (2), the kiln gas passage (3), also be provided with in the product channel (2) and promote backing plate (8), dividing plate (5) is provided with passage (6).
2. the new industrialization multi-channel type pushed-bat kiln with directly preparing phosphoric acid with phosphate ore according to claim 1 is characterized in that: dividing plate (5) is for recrystallization or sintered silicon carbon matter, mullite, aluminium oxide, silica, fused alumina zirconia or other is through antiseptic refractory material.
3. the new industrialization multi-channel type pushed-bat kiln with directly preparing phosphoric acid with phosphate ore according to claim 1 is characterized in that: be provided with flame shield (7) in the fuel combustion passage (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100532323A CN101118116B (en) | 2007-09-14 | 2007-09-14 | Novel industrialization multi-channel type pushed-bat kiln for directly preparing phosphoric acid with phosphate ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100532323A CN101118116B (en) | 2007-09-14 | 2007-09-14 | Novel industrialization multi-channel type pushed-bat kiln for directly preparing phosphoric acid with phosphate ore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101118116A CN101118116A (en) | 2008-02-06 |
| CN101118116B true CN101118116B (en) | 2011-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100532323A Expired - Fee Related CN101118116B (en) | 2007-09-14 | 2007-09-14 | Novel industrialization multi-channel type pushed-bat kiln for directly preparing phosphoric acid with phosphate ore |
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| CN (1) | CN101118116B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102616759B (en) * | 2012-03-26 | 2014-07-09 | 武汉工程大学 | Technique and device for preparing phosphoric acid by fluidized bed reactor |
| CN108083781A (en) * | 2017-12-29 | 2018-05-29 | 醴陵友立特种陶瓷有限公司 | Porous wear-resisting push plate of heat dissipation of pushed bat kiln casting zirconia corundum and preparation method thereof |
| CN113667837B (en) * | 2021-09-02 | 2022-09-09 | 江西金辉锂业有限公司 | Lithium ore tunnel kiln roasting method and device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB228185A (en) * | 1924-01-23 | 1926-06-23 | Victor Chemical Works | Improvements in and relating to processes for the production of phosphoric acid |
| US4351813A (en) * | 1981-05-20 | 1982-09-28 | Occidental Research Corporation | Process for producing phosphorus pentoxide or phosphorus or phosphoric acid |
| CN1025690C (en) * | 1989-08-31 | 1994-08-17 | 戴瑞乐 | Roller bed kiln using coal as fuel |
| CN2407316Y (en) * | 1999-10-11 | 2000-11-22 | 湖北省黄冈市中陶窑业技术开发有限公司 | Multi-channel firing roller kiln |
| CN2931448Y (en) * | 2006-06-28 | 2007-08-08 | 王毓生 | Special equipment for producing phosphoric acid by phosphorite carbon heating method |
| CN101020574A (en) * | 2006-09-30 | 2007-08-22 | 湖北三新磷酸有限公司 | Direct phosphate rock reducing process for preparing high concentration phosphoric acid and coproducing silicate and aluminate products |
| CN201102904Y (en) * | 2007-09-14 | 2008-08-20 | 湖北三新磷酸有限公司 | Novel industrial multi-channel slab kiln for directly preparing phosphoric acid from phosphorus ore |
-
2007
- 2007-09-14 CN CN2007100532323A patent/CN101118116B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB228185A (en) * | 1924-01-23 | 1926-06-23 | Victor Chemical Works | Improvements in and relating to processes for the production of phosphoric acid |
| US4351813A (en) * | 1981-05-20 | 1982-09-28 | Occidental Research Corporation | Process for producing phosphorus pentoxide or phosphorus or phosphoric acid |
| CN1025690C (en) * | 1989-08-31 | 1994-08-17 | 戴瑞乐 | Roller bed kiln using coal as fuel |
| CN2407316Y (en) * | 1999-10-11 | 2000-11-22 | 湖北省黄冈市中陶窑业技术开发有限公司 | Multi-channel firing roller kiln |
| CN2931448Y (en) * | 2006-06-28 | 2007-08-08 | 王毓生 | Special equipment for producing phosphoric acid by phosphorite carbon heating method |
| CN101020574A (en) * | 2006-09-30 | 2007-08-22 | 湖北三新磷酸有限公司 | Direct phosphate rock reducing process for preparing high concentration phosphoric acid and coproducing silicate and aluminate products |
| CN201102904Y (en) * | 2007-09-14 | 2008-08-20 | 湖北三新磷酸有限公司 | Novel industrial multi-channel slab kiln for directly preparing phosphoric acid from phosphorus ore |
Non-Patent Citations (1)
| Title |
|---|
| JP昭54-84890A 1979.07.06 |
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| CN101118116A (en) | 2008-02-06 |
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Granted publication date: 20110406 Termination date: 20160914 |