CN102390809A - Equipment for coproducing pure hydrogen chloride and potassium (sodium) sulfate - Google Patents
Equipment for coproducing pure hydrogen chloride and potassium (sodium) sulfate Download PDFInfo
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- CN102390809A CN102390809A CN2011102409442A CN201110240944A CN102390809A CN 102390809 A CN102390809 A CN 102390809A CN 2011102409442 A CN2011102409442 A CN 2011102409442A CN 201110240944 A CN201110240944 A CN 201110240944A CN 102390809 A CN102390809 A CN 102390809A
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Abstract
The invention relates to equipment for coproducing pure hydrogen chloride and potassium (sodium) sulfate, belonging to a rotary kiln and equipment for generating potassium (sodium) sulfate and pure hydrogen chloride gas by carrying out a cocurrent flow mixing reaction of potassium (sodium) chloride and concentrated sulfuric acid. According to the equipment, heat can be provided in an external heating or internal heating way, and heat transfer and mass transfer are enhanced by adopting internal members. The equipment has the advantages of low cost, high efficiency and low energy consumption. As shown to a right chart described in the specification, a heat preservation hearth 1, a chimney 2, a kiln body 3, a hydrogen chloride gas outlet 4, a potassium (sodium) chloride and sulfuric acid mixed material inlet 5, a support wheel 6, a large gear ring 7, a hearth support 8, a hearth support 9, a hearth support 10, a coal furnace 11, a support wheel 12, an outlet 13, a material receptor 14 and an acid-resistant lining 15 are shown.
Description
Technical field
The present invention relates to the equipment of pure hydrogenchloride of a kind of coproduction and vitriolate of tartar (sodium), is a kind of rotary kiln, with the Repone K (sodium) and the vitriol oil and flow the equipment that hybrid reaction generates vitriolate of tartar (sodium) and pure hydrogen chloride gas.
Background technology
This equipment has related to two relevant technical fields, a technical field that is to use Mannheim proeess to produce vitriolate of tartar (sodium), a technical field that is to use pure hydrogenchloride and silica flour to produce trichlorosilane.
For many years, worldwide,, be chlorideless potassic fertilizer and agriculture demand, particularly cash crop are needed badly because most of potassium ore deposit mainly is to exist with the Repone K form, wherein mainly be vitriolate of tartar, so world's vitriolate of tartar demand increases year by year.The method of producing vitriolate of tartar from Repone K mainly is a Mannheim proeess; The nucleus equipment of Mannheim proeess is a mannheim furnace; Mannheim furnace is a kind of horseshoe type flame-insulating type retort furnace, and the vitriol oil and Repone K are mixed the back from the charging of stove central authorities, and the mediad edge from mannheim furnace under stirring drives moves; Simultaneously be heated to the 400-600 degree by fuel; With this understanding after hybrid reaction 3-6 hour from the discharging of stove edge, this process can directly obtain qualified potassium product and contain the hydrogen chloride gas of other gases over half, and this hydrogen chloride gas generally to be water absorb the back sells as hydrochloric acid.Referring to document (Hua Shusen, Li Xiuhua, Feng Haibo. Mannheim proeess is produced vitriolate of tartar general introduction [J]. Shandong chemical industry, 2000,29: 24 – 26).The annual vitriolate of tartar of producing with this method in the whole world has more than 4,000,000 tons approximately.
Mannheim proeess also can be applied to the process of producing sodium sulfate from sodium-chlor; Particularly utilize local sulfur waste acid and sodium-chlor salt mine of suiting measures to local conditions; Or more have superiority when utilizing product sodium sulfate coproduction Sodium Sulphide, such as in area, West Inner Mongolia Alashan League, the salt ore resources in Jartai salt lake is very abundant; And local ore deposit factories such as copper mine all can produce a large amount of sulfur waste acid every year; Adopt this method to produce sodium sulfate and have the advantage that one action four gets, first has solved useless vitriolic problem of environmental pollution, and second has utilized the sodium-chlor of local salt mine; The 3rd obtains the local less raw material sulphuric acid sodium that can produce Sodium Sulphide, and the 4th provides the hydrogenchloride lower with respect to the electrolytic process cost.
In the production process of Mannheim proeess; The general content of the hydrogen chloride gas of by-product is lower than 50%; This gas generally is to produce 31% aqueous hydrochloric acid after water absorbs, and meanwhile, in the raw material trichlorosilane production process of polysilicon; Need a large amount of pure hydrogenchloride badly, may in production process of trichlorosilane, blast with hydrogen reaction because contain the hydrogenchloride of oxygen.And the by-product hydrogen chloride of Mannheim proeess is because the equipment reason; Existence is by air and stack gas blended factor; Can not satisfy this requirement; Resolve from hydrochloric acid and to obtain pure hydrogenchloride hydrogenchloride cost per ton and can increase more than 500 yuan, make it can directly provide pure hydrogenchloride directly to be used for trichlorosilane production to have great economic worth if therefore can improve mannheim furnace.Also become a problem highly significant.
The present invention has designed a kind of improved mannheim furnace, uses rotary kiln to substitute the horseshoe type muffle, thoroughly completely cuts off and has opened stack gas and reaction system, and the hydrogenchloride purity of generation is improved greatly, can directly be used for the trichlorosilane reaction.
Summary of the invention
This equipment is that the metal cylinder of an oval type adds accessory support and rotation Drive Structure, has added inner member in barrel and has avoided back mixing.The shell portion high temperature section adds the silit liner and prevents corrosion.The vitriol oil and Repone K (sodium) get in the rotary kiln through sealed structure from an end according to a certain percentage; Material is along with the rotation of rotary kiln is moved to outlet by import, in moving process, heated gradually and heats up by the high-temperature flue gas in the cylindrical shell outside; And the high-temp chlorination hydrogen heat exchange that reflects with tail end; Temperature is heated between the 500-600 degree by normal temperature gradually, through fully reaction in 3-6 hour, waits the qualified back of solid phase prod from terminal discharging.Then leave system with the pure hydrogenchloride after the low-temperature material heat exchange from feed end; This equipment is operation under pressure-fired; Guarantee that air can not sneak in the reactive system; This hydrogen chloride gas purity can reach more than 99%, so just can offer the use of trichlorosilane producer after only need removing a small amount of sulphur trioxide with the small amount of sulfur acid elution.
Compare with the horseshoe type muffle, this equipment hydrogen chloride gas had carried out sufficient heat exchange with the material that just gets into reactive system before extraction, so air outlet temperature is normal temperature basically.The mode that this equipment can adopt coal fuel directly to burn and heat; Hot blast flows along the opposite direction of feedstock direction; With the abundant heat exchange of the low-temperature material of continuous adding, equipment can be installed an amount of heat pipe or finned tube on cylindrical shell, strengthen the heat exchange between stack gas and the reaction mass through heat pipe and finned tube; The air outlet temperature of stack gas is reduced to below 300 degree, and energy utilization efficiency is very high.And the hydrogen chloride gas air outlet temperature of mannheim furnace is more than 500 degree simultaneously, and the stack gas air outlet temperature is more than 600 degree, and being used for substituting existing mannheim furnace at increasingly high this equipment today of energy prices also has very big advantage.
Mannheim furnace is because apparatus processing is made complicacy, and appurtenances are many, and maximum at present in the world device list stove produces vitriolate of tartar and can only accomplish about 10,000 tons; And investment is high; Frequency of maintenance is high, and equipment of the present invention is simple relatively owing to structure, and is easy to serialization production; Single cover processing power can reach few hundred thousand tonnes of, and investment is lower than mannheim furnace.
Description of drawings
Figure one is the sectional view of this equipment.
Shown in figure one, insulation burner hearth 1, chimney 2, kiln body 3, hydrogenchloride air outlet 4, Repone K (sodium) and vitriol oil opening for feed 5, support roller 6, bull gear 7, burner hearth support 8, burner hearth support 9, burner hearth support 10, coal furnace 11, support roller 12, discharge port 13, receiver 14, acid proof lining 15.
Reference
[1] Hua Shusen, Li Xiuhua, Feng Haibo. Mannheim proeess is produced vitriolate of tartar general introduction [J]. Shandong chemical industry, 2000,29: 24 – 26.
Claims (4)
1. the equipment of pure hydrogenchloride of coproduction and vitriolate of tartar (sodium) is a rotary kiln, is that the metal cylinder of an oval type adds accessory and supports and drive its device along the axis rotation.
2. according to the described rotary kiln of claim one, the accessory charging/discharging device is arranged, can use coal burning machine to carry out internal heating or outer heating, affiliated facilities such as burner hearth are arranged in the rotary kiln outside at the cylindrical shell two ends.
3. some acid proof linings are arranged such as the silit acid resisting brick etc. according to the cylindrical shell high temperature section of the described rotary kiln of claim one, be used to avoid equipment by pyritous sulfuric acid and hydrogen chloride gas corrosion.
4. according to the cylindrical shell of the described rotary kiln of claim one strengthening and heat transferring device can be installed, these devices comprise heat pipe, finned tube, can improve the overall thermal utilization ratio effectively with the heat transferred device interior of flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102409442A CN102390809A (en) | 2011-08-22 | 2011-08-22 | Equipment for coproducing pure hydrogen chloride and potassium (sodium) sulfate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102409442A CN102390809A (en) | 2011-08-22 | 2011-08-22 | Equipment for coproducing pure hydrogen chloride and potassium (sodium) sulfate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102390809A true CN102390809A (en) | 2012-03-28 |
Family
ID=45858220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102409442A Pending CN102390809A (en) | 2011-08-22 | 2011-08-22 | Equipment for coproducing pure hydrogen chloride and potassium (sodium) sulfate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102390809A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104180643A (en) * | 2014-09-04 | 2014-12-03 | 刘洪国 | Potash feldspar drying sintering kiln |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000274948A (en) * | 1999-03-19 | 2000-10-06 | Kawasaki Heavy Ind Ltd | External heating rotary kiln |
| CN201145474Y (en) * | 2007-12-27 | 2008-11-05 | 李泽伟 | High quality flame-proof energy conservation rotary kiln |
| CN202246050U (en) * | 2011-08-22 | 2012-05-30 | 韩扶军 | Device for co-producing pure hydrogen chloride and potassium sulfate/sodium sulfate |
-
2011
- 2011-08-22 CN CN2011102409442A patent/CN102390809A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000274948A (en) * | 1999-03-19 | 2000-10-06 | Kawasaki Heavy Ind Ltd | External heating rotary kiln |
| CN201145474Y (en) * | 2007-12-27 | 2008-11-05 | 李泽伟 | High quality flame-proof energy conservation rotary kiln |
| CN202246050U (en) * | 2011-08-22 | 2012-05-30 | 韩扶军 | Device for co-producing pure hydrogen chloride and potassium sulfate/sodium sulfate |
Non-Patent Citations (1)
| Title |
|---|
| 王德圣: "浅析硫酸钾曼海姆反应炉的国产化", 《磷肥与氮肥》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104180643A (en) * | 2014-09-04 | 2014-12-03 | 刘洪国 | Potash feldspar drying sintering kiln |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120328 |