CN100453463C - Process and apparatus for preparing magnesium oxide and hydrogen chloride mixed gas by two-stage dynamic calcining of magnesium chloride - Google Patents
Process and apparatus for preparing magnesium oxide and hydrogen chloride mixed gas by two-stage dynamic calcining of magnesium chloride Download PDFInfo
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- CN100453463C CN100453463C CNB2006101677683A CN200610167768A CN100453463C CN 100453463 C CN100453463 C CN 100453463C CN B2006101677683 A CNB2006101677683 A CN B2006101677683A CN 200610167768 A CN200610167768 A CN 200610167768A CN 100453463 C CN100453463 C CN 100453463C
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- magnesium chloride
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- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 title claims abstract description 59
- 239000007789 gas Substances 0.000 title claims abstract description 59
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910001629 magnesium chloride Inorganic materials 0.000 title claims abstract description 29
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 17
- 238000001354 calcination Methods 0.000 title claims description 44
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 title claims description 15
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 title abstract description 7
- 229910000041 hydrogen chloride Inorganic materials 0.000 title abstract description 7
- 238000000034 method Methods 0.000 title abstract description 7
- 239000007787 solid Substances 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000005660 chlorination reaction Methods 0.000 claims description 28
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 18
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 18
- 239000001257 hydrogen Substances 0.000 claims description 18
- 229910052739 hydrogen Inorganic materials 0.000 claims description 18
- 239000011777 magnesium Substances 0.000 claims description 18
- 229910052749 magnesium Inorganic materials 0.000 claims description 18
- 238000005516 engineering process Methods 0.000 claims description 14
- 238000000926 separation method Methods 0.000 claims description 12
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 9
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 9
- 239000004571 lime Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000000197 pyrolysis Methods 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- 150000003839 salts Chemical class 0.000 claims description 7
- 238000005245 sintering Methods 0.000 abstract 3
- KCLANYCVBBTKTO-UHFFFAOYSA-N Proparacaine Chemical compound CCCOC1=CC=C(C(=O)OCCN(CC)CC)C=C1N KCLANYCVBBTKTO-UHFFFAOYSA-N 0.000 abstract 1
- 229940087458 alcaine Drugs 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- DARFZFVWKREYJJ-UHFFFAOYSA-L magnesium dichloride dihydrate Chemical compound O.O.[Mg+2].[Cl-].[Cl-] DARFZFVWKREYJJ-UHFFFAOYSA-L 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005118 spray pyrolysis Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000001149 thermolysis Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QHCOZCIZCMGJBI-UHFFFAOYSA-N Cl.[O-2].[Mg+2] Chemical compound Cl.[O-2].[Mg+2] QHCOZCIZCMGJBI-UHFFFAOYSA-N 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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Abstract
The invention discloses a making technique and equipment of magnesia and hydrogen chloride through two-grade dynamic sintering magnesium chloride, which comprises the following steps: drying tail gas of high-temperature hydrogen chloride with water magnesium chloride; sintering magnesium chloride under 600-900 deg.c to decompose magnesium chloride into magnesia and hydrogen chloride; separating solid from liquid; drying; cooling; obtaining the product; making alcaine. The mated equipment is composed of hot wind device, sintering tower, cyclone separator 1, flow drier, gas-solid separating device, raw material adder, seal-phased transmitting pipe, blower and induced fan.
Description
One. technical field:
The invention belongs to chemical industry of inorganic salt equipment and chemical technology field, it provides the equipment and the processing condition of a kind of the two poles of the earth dynamic calcining magnesium chloride oxygenerating magnesium and chlorine hydride mixed gas body.
Two. background technology:
With the magnesium chloride is that raw material adopts high temperature pyrolysis (calcining) technology can produce magnesium oxide and chlorine hydride mixed gas body, handles the hydrogen chloride gas mixture body with absorption equipment and can obtain hydrochloric acid.Calcining magnesium chloride oxygenerating magnesium and chlorine hydride mixed gas body, technology and the equipment that has moved has two kinds both at home and abroad:
Abroad: Israel is that raw material adopts the spray pyrolysis method to obtain magnesium oxide and chlorine hydride mixed gas body with saturated magnesium chloride solution, and major equipment comprises spray pyrolysis tower and magnesium chloride solution preheating tower.
Domestic: the present patent application people Qinghai CITIC Guoan Science and Technology Development Co., Ltd. is a raw material with the magnesium chloride saturated solution, adopt spraying drying system magnesium chloride dihydrate, obtain magnesium oxide and chlorine hydride mixed gas body, obtain hydrochloric acid with graphite absorption equipment processing mixed gas with the calcined by rotary kiln magnesium chloride dihydrate, this device brings into operation and has applied for national inventing patent, application number in May, 2006: 200510085832.9.Aforesaid device exists energy consumption height, low, the equipment anticorrosion defect of high cost of hydrochloric acid product concentration.
Three, summary of the invention:
The Processes and apparatus that the purpose of this invention is to provide a kind of the two poles of the earth dynamic calcining magnesium chloride oxygenerating magnesium and chlorine hydride mixed gas body, compared with prior art, this technology and equipment not only have the less investment of founding the factory, low, the easy to operate advantage of energy consumption, also reduced hydrogen chloride gas mixture body temperature degree, for back segment hydrochloric acid absorption equipment has reduced cost, save cost, also increased the pyrolysis rate of magnesium oxide product.
Production technique provided by the invention mainly comprises following technological process, as shown in Figure 1:
The raw material hydrated magnesium chloride carries out drying with high-temp chlorination hydrogen tail gas, dried thermal chlorination magnesium is calcined under 600～900 ℃ of conditions and is made the magnesium chloride pyrolysis become magnesium oxide and high-temp chlorination hydrogen tail gas, get magnesium oxide product and high-temp chlorination hydrogen tail gas after the gas solid separation, high-temp chlorination hydrogen tail gas is introduced the dry hydrated magnesium chloride of drying process by pipeline, and the chlorine hydride mixed gas body after the cooling enters salt manufacturing acid operation and gets the salt acid product.Main component is air, steam, hydrogen chloride gas in the high-temp chlorination hydrogen tail gas.Technology of the present invention mainly contains three operations such as drying, calcining, gas solid separation, and salt manufacturing acid is aided process.Core of the present invention is exactly that the high-temp chlorination hydrogen tail gas that calcining produces is returned dry hydrated magnesium chloride, the hydrated magnesium chloride intensification is dewatered enter the first-stage dynamic calcining, high-temp chlorination hydrogen tail gas is effectively lowered the temperature, its heat energy is utilized effectively, effectively reduce the heat energy consumption in the calcining again, improve the pyrolysis rate of magnesium oxide product, reduced production cost of products.
The equipment of the two poles of the earth of the present invention dynamic calcining magnesium chloride oxygenerating magnesium and chlorine hydride mixed gas body, as shown in Figure 2, it is characterized in that it is by hot air apparatus, the calcining tower, cyclonic separator one, pneumatic dryer, gas-solid separating device, the raw materials device, close phase transfer lime, gas blower, induced draft fan nine parts are formed, hot air apparatus is made up of burner and hotblast stove, burner links to each other with hotblast stove, hotblast stove links to each other with the calcining tower, the calcining tower links to each other with cyclonic separator one, cyclonic separator one links to each other with pneumatic dryer by pipeline, pneumatic dryer links to each other with gas-solid separating device, the raw materials device links to each other with pneumatic dryer, one end of close phase transfer lime links to each other with the calcining tower, its the other end links to each other with gas blower, induced draft fan links to each other with gas-solid separating device by pipeline, the inlet temperature of calcining tower is 700～950 ℃, and its air outlet temperature is 500～750 ℃.Equipment of the present invention matches with technology.Hot air apparatus is to provide thermal source to add warm air produces about 700～950 ℃ of hot blasts in hotblast stove device by burner, makes its pyrolysis become magnesium oxide and high-temp chlorination hydrogen tail gas for the calcining tower provides high-temperature hot-air to be used for calcining thermal chlorination magnesium.Cyclonic separator one is the device that the magnesium oxide solid after calcining tower calcining back and the thermolysis and high-temp chlorination hydrogen tail gas are carried out gas solid separation, gas phase after the separation enters pneumatic dryer and removes hydrated magnesium chloride raw material dry and that heating is added by the raw materials device, hydrated magnesium chloride carries out the first-stage dynamic calcining in pneumatic dryer, and then enter calcining and carry out the The two-stage dynamic calcining in the tower, so just effectively improved the pyrolysis rate of magnesium oxide product, high-temp chlorination hydrogen tail gas was both effectively lowered the temperature, its heat energy is effectively utilized, reduce the heat energy consumption in the calcining tower again, thereby reduced production cost.The chlorine hydride mixed gas body of gas solid separation apparatus after the thermal chlorination magnesium solid of pneumatic dryer inner drying and heating and cooling carries out the device of gas solid separation, thermal chlorination magnesium solid after the separation is delivered in the calcining tower by close phase transfer lime with gas blower and is calcined, and the chlorine hydride mixed gas body after the separation is taken out salt manufacturing acid under the induced draft fan effect.The inlet temperature of calcining tower is meant the temperature of the hot blast of hotblast stove generation at calcining tower blast inlet place, and air outlet temperature is meant the temperature of calcining tower air outlet place hot blast.
Technology of the present invention and equipment compared with the prior art, it possesses skills advanced and mature reliable, effectively improves the pyrolysis rate of magnesium oxide product and has reduced product cost.
Four, description of drawings:
Fig. 1 is a process flow diagram of the present invention.
Fig. 2 is an equipment master TV structure synoptic diagram of the present invention.
Fig. 1 is described in front, no longer repeats here.Among Fig. 2: 1 burner; 2. hotblast stove; 3. charging opening, it is the opening for feed that thermal chlorination magnesium in the close phase transfer lime 11 enters calcining tower 4; 4. calcining tower; 5. cyclonic separator one, and it is that its bottom is air sealer A6 with solid oxidation magnesium after the calcining in the calcining tower 4 and the high-temp chlorination hydrogen tail gas device that carries out gas solid separation, and air sealer is the parts that bar up upper gas and unload solid materials; 6. air sealer A; 7. raw materials device, the hydrated magnesium chloride raw material enters in the pneumatic dryer 8 through this feeder; 8. pneumatic dryer; 9. cyclonic separator two; 10. air sealer B, it is located at the bottom of cyclonic separator two; 11. close phase transfer lime, the thermal chlorination magnesium solid after drying that gets off from air sealer B and air sealer C under the effect of gas blower 16 in close transfer lime mutually 11 is delivered to calcining tower 4; 12. cyclonic separator three; 13. air sealer C, it is located at the bottom of cyclonic separator three, cyclonic separator two and cyclonic separator three are gas-solid separating device, chlorine hydride mixed gas body after it adopts the isolating mode of two-stage with thermal chlorination magnesium solid and cooling carries out gas solid separation, and solid is drained in the close transfer lime mutually 11 from air sealer B and air sealer C; 14. pipeline is the pipeline of delivery air; 15. induced draft fan; 16. gas blower.
Five. embodiment:
Embodiment one: technology is with hydrated magnesium chloride raw material high-temp chlorination hydrogen tail gas, carry out the first-stage dynamic calcining, also claim dry, calcining makes the magnesium chloride thermolysis become the magnesium oxide hydrogen chloride tail gas in the hot blast of dried heated thermal chlorination magnesium about 600 ℃, get magnesium oxide product and high-temp chlorination hydrogen tail gas after the gas solid separation, high-temp chlorination hydrogen tail gas is introduced dry hydrated magnesium chloride raw material by pipeline, and the chlorine hydride mixed gas body after the cooling enters in the salt manufacturing acid.
Embodiment two: technology is basic identical with embodiment one, just calcines in the hot blast of heated thermal chlorination magnesium about 900 ℃ after the drying.The technology of back is identical.
Embodiment three: the embodiment of equipment is shown in Figure 2, T1 among Fig. 2 is the inlet temperature of calcining tower 4, the inlet temperature of this embodiment is made as about 700 ℃, T2 is the air outlet temperature of calcining tower 4, the air outlet temperature of this embodiment is about 500 ℃, remaining part is narrated in description of drawings, no longer repeats here.
Embodiment four: the embodiment of equipment still is shown in Figure 2, and the T1 among Fig. 2 is made as about 950 ℃, and T2 is made as about 750 ℃, and all the other are identical with embodiment three.
Claims (2)
1. the technology of two-stage dynamic calcining magnesium chloride oxygenerating magnesium and chlorine hydride mixed gas body, it is characterized in that the raw material hydrated magnesium chloride carries out drying with high-temp chlorination hydrogen tail gas, dried thermal chlorination magnesium is calcined under 600～900 ℃ of conditions and is made the magnesium chloride pyrolysis become magnesium oxide and high-temp chlorination hydrogen tail gas, get magnesium oxide product and high-temp chlorination hydrogen tail gas after the gas solid separation, high-temp chlorination hydrogen tail gas is introduced the dry hydrated magnesium chloride of drying process by pipeline, and the chlorine hydride mixed gas body after the cooling enters salt manufacturing acid operation and gets the salt acid product.
2. the equipment of two-stage dynamic calcining magnesium chloride oxygenerating magnesium and chlorine hydride mixed gas body, it is characterized in that it is by hot air apparatus, calcining tower (4), cyclonic separator one (5), pneumatic dryer (8), gas-solid separating device, raw materials device (7), close phase transfer lime (11), gas blower (16), induced draft fan (15) nine parts are formed, hot air apparatus is made up of burner (1) and hotblast stove (2), burner (1) links to each other with hotblast stove (2), hotblast stove (2) links to each other with calcining tower (4), calcining tower (4) links to each other with cyclonic separator one (5), cyclonic separator one (5) links to each other with pneumatic dryer (8) by pipeline, pneumatic dryer (8) links to each other with gas-solid separating device, raw materials device (7) links to each other with pneumatic dryer (8), one end of close phase transfer lime (11) links to each other with calcining tower (4), its the other end links to each other with gas blower (16), induced draft fan (15) links to each other with gas-solid separating device by pipeline, the inlet temperature of calcining tower (4) is 700～950 ℃, and its air outlet temperature is 500～750 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101677683A CN100453463C (en) | 2006-12-21 | 2006-12-21 | Process and apparatus for preparing magnesium oxide and hydrogen chloride mixed gas by two-stage dynamic calcining of magnesium chloride |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101677683A CN100453463C (en) | 2006-12-21 | 2006-12-21 | Process and apparatus for preparing magnesium oxide and hydrogen chloride mixed gas by two-stage dynamic calcining of magnesium chloride |
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| CN101007643A CN101007643A (en) | 2007-08-01 |
| CN100453463C true CN100453463C (en) | 2009-01-21 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102139895B (en) * | 2011-04-25 | 2012-08-29 | 东北大学 | Method for preparing high-purity magnesium oxide from titanium sponge byproduct fused magnesium chloride |
| CN111072055A (en) * | 2019-12-21 | 2020-04-28 | 泰兴冶炼厂有限公司 | Airflow calcinator |
| CN111807390A (en) * | 2020-07-30 | 2020-10-23 | 焦作市雾神化工设备有限公司 | System for preparing high-purity magnesium oxide from magnesium chloride solution and using method thereof |
| CN114408951B (en) * | 2021-12-06 | 2023-12-26 | 南京工业大学 | Method for preparing industrial grade magnesium oxide and hydrochloric acid by utilizing solid waste of glass magnesium board |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1724372A (en) * | 2005-07-17 | 2006-01-25 | 青海中信国安科技发展有限公司 | Process for producing lithium carbonate magnesium oxide and hydrogen chloride by high magnesium lithium-containing halogen water |
| CN1830787A (en) * | 2006-03-21 | 2006-09-13 | 中国科学院青海盐湖研究所 | Method of preparing high purity magnesium oxide by closed pyrolysis magnesium chloride hydrate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1724372A (en) * | 2005-07-17 | 2006-01-25 | 青海中信国安科技发展有限公司 | Process for producing lithium carbonate magnesium oxide and hydrogen chloride by high magnesium lithium-containing halogen water |
| CN1830787A (en) * | 2006-03-21 | 2006-09-13 | 中国科学院青海盐湖研究所 | Method of preparing high purity magnesium oxide by closed pyrolysis magnesium chloride hydrate |
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Address after: 816000 Qaidam West Road, Golmud, Qinghai Province, No. 16 Co-patentee after: Changzhou Heli drying equipment Co.,Ltd. Patentee after: QINGHAI CITIC GUOAN SCIENCE AN Address before: 816000 Qaidam West Road, Golmud, Qinghai Province, No. 16 Co-patentee before: Changzhou Heli Drying Equipment Co.,Ltd. Patentee before: QINGHAI CITIC GUOAN SCIENCE AN |
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Effective date of registration: 20180226 Address after: 816099 Building No. 24, Golmud City, Qinghai Province, No. 1 Patentee after: QINGHAI ZHONGXIN GUOAN LITHIUM DEVELOPMENT CO.,LTD. Address before: 816000 Qaidam West Road, Golmud, Qinghai Province, No. 16 Co-patentee before: Changzhou Heli drying equipment Co.,Ltd. Patentee before: QINGHAI CITIC GUOAN SCIENCE AN |
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Effective date of registration: 20190716 Granted publication date: 20090121 |
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