CN102849769A - Method and device capable of simultaneously providing various clean heat sources to prepare polyaluminum chloride - Google Patents
Method and device capable of simultaneously providing various clean heat sources to prepare polyaluminum chloride Download PDFInfo
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- CN102849769A CN102849769A CN2012103578245A CN201210357824A CN102849769A CN 102849769 A CN102849769 A CN 102849769A CN 2012103578245 A CN2012103578245 A CN 2012103578245A CN 201210357824 A CN201210357824 A CN 201210357824A CN 102849769 A CN102849769 A CN 102849769A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 title abstract 4
- 238000004519 manufacturing process Methods 0.000 claims abstract description 53
- 238000000746 purification Methods 0.000 claims abstract description 27
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 199
- 239000007788 liquid Substances 0.000 claims description 43
- 239000003245 coal Substances 0.000 claims description 41
- 239000002253 acid Substances 0.000 claims description 38
- 238000010438 heat treatment Methods 0.000 claims description 38
- 239000003595 mist Substances 0.000 claims description 37
- 238000011084 recovery Methods 0.000 claims description 36
- 239000000428 dust Substances 0.000 claims description 33
- 238000004140 cleaning Methods 0.000 claims description 24
- 238000001035 drying Methods 0.000 claims description 23
- 239000007789 gas Substances 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000002485 combustion reaction Methods 0.000 claims description 20
- 229910052782 aluminium Inorganic materials 0.000 claims description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 18
- 239000004411 aluminium Substances 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 11
- 238000010521 absorption reaction Methods 0.000 claims description 10
- 239000003546 flue gas Substances 0.000 claims description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 9
- 238000005202 decontamination Methods 0.000 claims description 9
- 230000003588 decontaminative effect Effects 0.000 claims description 9
- 230000001939 inductive effect Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 239000007921 spray Substances 0.000 abstract description 4
- 239000000047 product Substances 0.000 description 82
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 19
- 239000005864 Sulphur Substances 0.000 description 19
- 239000002802 bituminous coal Substances 0.000 description 15
- 239000007790 solid phase Substances 0.000 description 12
- 239000002994 raw material Substances 0.000 description 10
- 230000003647 oxidation Effects 0.000 description 8
- 238000007254 oxidation reaction Methods 0.000 description 8
- 239000008399 tap water Substances 0.000 description 8
- 235000020679 tap water Nutrition 0.000 description 8
- 239000000446 fuel Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000012263 liquid product Substances 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 5
- 238000006477 desulfuration reaction Methods 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 239000004927 clay Substances 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 210000004243 sweat Anatomy 0.000 description 4
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 3
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 3
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 3
- 229910001388 sodium aluminate Inorganic materials 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 2
- 235000010261 calcium sulphite Nutrition 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010410 dusting Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000010884 boiler slag Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Classifications
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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 invention discloses a method and a device capable of simultaneously providing various clean heat sources to prepare a polyaluminum chloride. The method includes preparing clean high temperature hot wind, performing heat supply by a conduction oil heat exchanger, performing heat supply by a vapor generator, performing heat supply by a spray dryer, performing hot wind purification by the spray dryer and performing tail gas treatment. The method and the device capable of simultaneously providing various clean heat sources to prepare the polyaluminum chloride have the advantages that heat supply systems are centralized, the heat supply efficiency is high, and polyaluminum chloride product production is low in energy consumption, small in pollution and low in operating cost.
Description
Technical field
The present invention relates to a kind ofly provides multiple cleaning heat source for the method that prepare poly aluminium chloride simultaneously, the invention still further relates to a kind ofly to realize that this provides multiple cleaning heat source confession to prepare the device of the method for poly aluminium chloride simultaneously.
Background technology
Poly aluminium chloride is outstanding water purification agent product, market demand increases substantially year by year, China is poly aluminium chloride products production big country, 2011 annual production are above 1,500,000 tons, but the poly aluminium chloride industry is a sufficient industry of market competition, and it is low to produce threshold, and manufacturing enterprise reaches hundreds of families in the industry, the industrial scale major part is about 1-2 is ten thousand ton/years, and large enterprises seldom.
The production of poly aluminium chloride mainly is to adopt bauxitic clay, calcium aluminate, aluminium hydroxide, sodium aluminate and hydrochloric acid etc. as raw material, be reaction more than 100 ℃ in temperature at first, the synthetic fluid poly aluminium chloride, and then be dried into solid phase prod with drying machine, thermal source has high-temperature steam, high temperature heat conductive oil and high-temperature hot-air, drying machine has two kinds of roller dryer and spray-driers, at present, the drying production of domestic poly aluminium chloride, adopt the enterprise of sweat roll drying machine production to account for major part, be traditional mode of production enterprise, this portioned product accounts for national output about 50%.The sweat roll drying machine is produced, because the drying source temperature is low, can only be higher than 93% product by dry basicity, the liquid oxidation aluminium content of this series products only has about 10%, therefore, production energy consumption is high, and the coal consumption of ton product is up to 500kg, in addition, for the basicity that guarantees product is higher than 93%, must add a large amount of bauxitic clays and calcium aluminate raw material in the production process, heavy metal content is high in the product, can only be used for sewage disposal and use; In recent years, domestic successful is developed conduction oil rotary drum drier and is replaced the sweat roll drying machine to produce solid phase prod, its core is to adopt conduction oil hot blast stove band waste heat steam boiler, the thermal oil recycle, the steam that waste heat boiler produces is for the production of the liquid poly aluminium chloride, the existing Some Enterprises of this technology uses, and output accounts for about 20% of national output.Conduction oil rotary drum drier is produced, because the drying source temperature is high, can be higher than 88% liquid poly aluminium chloride product by dry basicity, the liquid oxidation aluminium content of this series products can reach about 12%, therefore, production energy consumption is lower, 300kg is only used in the coal consumption of ton product, in addition, because the basicity of liquid product is reduced to 88%, the available hydrogen alumina raw material replaces the part bauxitic clay in the production process, and the calcium aluminate consumption has also reduced, so the product that the comparable sweat roll drying machine of heavy metal content is produced in the product is low; This technical deficiency part is that the heat-conducting oil furnace hot blast need to increase dusting and desulfuring system, hot blast with heat fail to be fully used; The technology content that adopts spray-drier to produce is higher, and facility investment is large, is nearly ten times of roller dryer, therefore adopts the enterprise of this method drying few, and this portioned product accounts for national output about 30%.But spray-drier production efficiency is high, single machine yield is large, long service life, be more than ten times of roller dryer work-ing life, produce strong adaptability, can produce basicity greater than any poly aluminium chloride product of 40%, as when producing basicity and being the product of 70%-80%, the alumina content of liquid poly aluminium chloride can be controlled to 13.5%-14.5%, when the production basicity is the product of 40%-50%, the alumina content of liquid poly aluminium chloride reaches 18.0%-19.0%, and the moisture that dry like products need to evaporate is less.It is the higher hot blast of temperature that spray-drier is produced thermal source, the heat supply of indirect heat exchange chain hotblast stove is mainly adopted in the production of conventionally spray-dried machine, thermo-efficiency is the highest to be only had about 70%, and interchanger needs often cleaning, otherwise can reduce the parallel operation heat exchange efficiency, make overall thermal efficiency be lower than 70%, the flue gas that coal combustion produces also will increase desulfurization and dust removal equipment, the production basicity is 70%-80%, when alumina content can be controlled to the poly aluminium chloride product of 13.5%-14.5%, the coal consumption of ton product reaches 380-400kg, in addition, the production of liquid poly aluminium chloride also needs to build the steam boiler steam supply, and this spraying drying mode has more than 20 year history, and its output still accounts for 50% of spray dried prod at present.In recent years, domestic successful has been developed the spraying drying production technology of direct-combustion furnace heat supply, its core is to adopt direct combustion hot-air furnace, directly with flue as the spraying drying thermal source, thermo-efficiency reaches more than 90%, production system does not need to build in addition desulfurization and dust removal equipment, the production basicity is 70%-80%, when alumina content can be controlled to the poly aluminium chloride product of 13.5%-14.5%, 300-320kg was only used in the coal consumption of ton product, and the output that adopts this technology to produce has accounted for 50% of spray dried prod at present.This technical deficiency part is that system does not produce steam, and producing liquid poly aluminium chloride workshop section also needs to increase the steam boiler heat supply, and little steam boiler environmental impact assessment be difficult to by.
Summary of the invention
First technical problem to be solved by this invention provides a kind of heating system and concentrates, and heating efficiency is high, and poly aluminium chloride products production energy consumption is low, pollutes littlely, provides multiple cleaning heat source confession to prepare the method for poly aluminium chloride when working cost is low.
Second technical problem to be solved by this invention provides a kind of realization heating system and concentrates, and heating efficiency is high, and poly aluminium chloride products production energy consumption is low, pollutes littlely, provides multiple cleaning heat source for the device for preparing poly aluminium chloride when working cost is low.
Provide simultaneously multiple cleaning heat source for the method for preparing poly aluminium chloride in order to solve above-mentioned first technical problem, to the invention provides, may further comprise the steps:
1) the clean high-temperature hot-air of preparation: coaling machine is delivered to the coal burning machine combustion chamber with fire coal, the coal-fired high-temperature hot-air that produces 600-900 ℃ in combustion chambers burn, burner blower is delivered to the high temperature purification chamber with hot blast and is purified, the exhaust gas volumn of leading to heat-condutive oil heat exchanger, vapour generator and wind mixed chamber by three high-temperature gate valve controls respectively after the purification, the properly distributed of assurance high-temperature flue gas;
2) heat-condutive oil heat exchanger heat supply: come the high-temperature hot-air of Self-air-heating decontamination chamber and the interior thermal oil of heat-condutive oil heat exchanger heating chamber boiler tube to carry out heat exchange, the heating thermal oil, high temperature heat conductive oil after the heating, as the roller dryer thermal source, from roller dryer low temperature deep fat out, return the heat-condutive oil heat exchanger heating chamber, carry out heat exchange with high-temperature hot-air again, recycle; Low temperature hot blast after the heat exchange carries out second stage employ through air inducing power traction back-mixing air compartment;
3) vapour generator heat supply: come the high-temperature hot-air heat of Self-air-heating decontamination chamber and the interior water of vapour generator heating chamber boiler tube to carry out heat exchange, water is heated into steam, be used for the production of liquid poly aluminium chloride, the low temperature hot blast after the heat exchange carries out second stage employ through air inducing power traction back-mixing air compartment;
4) spray-drier heat supply: the high-temperature hot-air heat of coming the Self-air-heating decontamination chamber respectively with from the low temperature hot blast of heat-condutive oil heat exchanger, mix in wind mixed chamber from the low temperature hot blast of vapour generator with from the normal temperature air in the atmosphere, high-temperature hot-air after the mixing temperature adjustment from mixed hot cell out, carry out dry method dust through one group of cyclonic separator, hot blast after further purifying enters spray-drier, as the thermal source of liquid poly aluminium chloride drying;
5) the spray-drier hot blast purifies and vent gas treatment: after high-temperature hot-air enters spray-drier, heat in the hot blast, sulfurous gas and a small amount of dust are atomized into very tiny poly aluminium chloride drop absorption cleaning, from spray-drier low temperature hot blast out, enter the acid mist recovery tower, water with atomizing in the acid mist recovery tower reclaims contained a small amount of poly aluminium chloride dust in the hot blast, and further reduce the temperature of hot blast, then it is entered atmosphere, enter that sulfurous gas and dust content are zero in the low temperature hot blast of atmosphere, the hot water that the acid mist recovery tower reclaims is back to the production of liquid poly aluminium chloride.
Above-mentioned steps 2) heat-condutive oil heat exchanger is for pining for: the high-temperature hot-air that the coal burning machine combustion chamber produces enters the purification hot air chamber after the dedusting of high temperature purification chamber, then guide to the heat-condutive oil heat exchanger heating chamber by high-temperature gate valve, carry out heat exchange with thermal oil in the boiler tube, with heat-conducting oil heating to 350 ℃.
Above-mentioned steps 3) vapour generator is for pining for: it is 180 ℃ high-temperature steam that the water of vapour generator is heated to form temperature, the thermal source that this steam is produced as the liquid poly aluminium chloride.
In order to solve above-mentioned second technical problem, realization provided by the invention provides the device of multiple cleaning heat source for the method for preparing poly aluminium chloride simultaneously, coal burning machine is connected with the high temperature purification chamber, described high temperature purification chamber is connected with the purification hot air chamber, described purification hot air chamber is connected with vapour generator by the first valve, the vapour pipe of described vapour generator is connected with steam and divides drum, the hot blast end of described vapour generator adopts the first induced draft fan to be connected with wind mixed chamber, described purification hot air chamber connects described wind mixed chamber by second valve, described wind mixed chamber is provided with air intlet, described purification hot air chamber is connected with the air intake of heat-condutive oil heat exchanger by the 3rd valve, the outlet air end of described heat-condutive oil heat exchanger is connected with described wind mixed chamber 7 by the second induced draft fan, described wind mixed chamber is connected with the air intake of spray-drier by tornado dust collector, the outlet air end of described spray-drier is connected with the first acid mist recovery tower, the air outlet of described the first acid mist recovery tower is connected with the first chimney by the 3rd induced draft fan, the drain side of described the first acid mist recovery tower is connected with the first recycle pump, described the first circulation pump outlet respectively with described the first acid mist recovery tower be connected aluminium liquid workshop and be connected, the deep fat end of described heat-condutive oil heat exchanger is connected with the heat exchange entrance end of roller dryer, the heat exchange exit end of described roller dryer is connected with the thermal oil return tank, described thermal oil return tank is connected with the cold oil end of described heat-condutive oil heat exchanger by the thermal oil transferpump, the air outlet of described roller dryer is connected with the second acid mist recovery tower, the air outlet of described the second acid mist recovery tower is connected with the second chimney by the 4th induced draft fan, the drain side of described the second acid mist recovery tower is connected with the second recycle pump, described the second circulation pump outlet respectively with described the second acid mist recovery tower be connected aluminium liquid workshop and be connected.
Provide multiple cleaning heat source for the method and the device thereof that prepare poly aluminium chloride when adopting technique scheme, heat-condutive oil heat exchanger heat supply coal consumption: 2) heat-condutive oil heat exchanger is mainly roller dryer production heat supply in the step, and the coal consumption of ton solid phase prod is 260～280kg/ ton poly aluminium chloride.Vapour generator heat supply coal consumption: 3) vapour generator produces 0.6MPa steam in the step, is used for the production of liquid poly aluminium chloride, and coal consumption is 150～160kg/ ton steam.Spray-drier heat supply coal consumption: 4) coal consumption of spray-drier production solid phase prod is the high-purity poly aluminium chloride of 160～180kg/ ton in the step.Spray-drier heat supply coal consumption: 4) coal consumption of spray-drier production solid phase prod is the common poly aluminium chloride of 260～280kg/ ton in the step.
The method that the invention provides multiple cleaning heat source can be used 4500-7000kcal/kg, the common bituminous coal of sulphur content 0-4%, institute's heat supplied can prepare the solid phase prods such as liquid poly aluminium chloride, the yellow poly aluminium chloride of technical grade, the light yellow poly aluminium chloride of tap water level or high-purity grade of white poly aluminium chloride simultaneously, boiler slag carbon content is lower than 3%, coal-fired heat utilization efficiency reaches more than 90%, the gas temperature that system enters atmosphere is lower than 50 ℃, and dust and content of sulfur dioxide are zero in institute's emission gases; The recycle of used thermal oil carrier, the high-temperature steam that vapour generator produces is realized second stage employ, water vapor and acid mist cold water spray-absorption that the poly aluminium chloride production process produces, institute's restored acid water hot in nature is used for liquid poly aluminium chloride products production, in the system production process, the balanced use that keeps water by selling the partially liq product is realized sewage zero-discharge.
With 6000kcal/kg, the common bituminous coal of sulphur content 2% is fuel, per hour require to produce 3.5 tons of poly aluminium chlorides (amounting to solid phase prod), comprise and per hour produce 2.0 tons by the yellow product of technical grade (wherein 1.5 tons of products are dry with roller dryers, sell as liquid product for other 0.5 ton, do not need drying) and the light yellow product of tap water level per hour produce 1.5 tons, tap water level poly aluminium chloride is dry with spray-drier.This total heat capacity in system combustion chamber is 5,300,000 kcal/ hours, the dry heat supplied that needs of roller dryer is 2,000,000 kcal/ hours, the heat supplied of liquid poly aluminium chloride need of production is 1,000,000 kcal/ hours, the heat supplied that spray-drier needs is 1,900,000 kcal/ hours, thermosteresis 400,000 kcal/ hours, total heat utilization efficiency is 92.5%, production process per hour consumes coal 884kg, wherein the dry coal consumption of roller dryer is ton product 222kg, the dry coal consumption of spray-drier is ton product 211kg, bituminous coal combustion produces sulphur content and is 17.7kg per hour, the poly aluminium chloride product of all being produced by spray-drier absorbs, and sulphur content is ton product 11.8kg in the product, accounts for 1.18%, form with calcium sulfite is present in the product, can not affect quality product.
With 4500kcal/kg, the bituminous coal of sulphur content 4% is fuel, per hour require to produce 3.5 tons of poly aluminium chlorides (amounting to solid phase prod), comprise and per hour produce 2.0 tons by the yellow product of technical grade (wherein 1.5 tons of products are dry with roller dryers, sell as liquid product for other 0.5 ton, do not need drying) and high-purity grade of white products per hour produce 1.5 tons, high-purity poly aluminium chloride is dry with spray-drier.This total heat capacity in system combustion chamber is 5,300,000 kcal/ hours, actual is 5,200,000 kcal/ hours with heat, the dry heat supplied that needs of roller dryer is 2,000,000 kcal/ hours, the heat supplied of liquid poly aluminium chloride need of production is 1,100,000 kcal/ hours, the heat supplied that spray-drier needs is 1,700,000 kcal/ hours, thermosteresis 400,000 kcal/ hours, total heat utilization efficiency is 92.3%, production process per hour consumes coal 1156kg, wherein the dry coal consumption of roller dryer is ton product 296.3kg, the dry coal consumption of spray-drier be ton product 2 51.9kg, and bituminous coal combustion produces sulphur content and is 46.3kg per hour, the poly aluminium chloride product absorption of all being produced by spray-drier, sulphur content is ton product 30.9kg in the product, account for 3.1%, be present in the product with the form of Tai-Ace S 150, can not affect quality product.
Technical scheme of the present invention can produce following technique effect:
The present technique heat supplying process at first produces high-temperature hot-air by burner, through use respectively the thermal source of wind mixed chamber behind the high-temperature dust removal as heat-condutive oil heat exchanger, vapour generator and spray-drier.During for heat-condutive oil heat exchanger, low temperature hot blast after the heat exchange all draws the back-mixing air compartment and carries out second stage employ, 180 ℃ the flue gas formed waste of must draining when having avoided independent use heat-conducting oil furnace, do not need to build again desulfurating dust removing device for flue gas yet, and because the hot blast of heat-condutive oil heat exchanger that present technique supplies is cleaner, do not need often to clear up heat exchanger, heat exchange efficiency is high, and operation power and working cost are all lower; During for vapour generator, low temperature hot blast after the heat exchange also all draws the back-mixing air compartment and carries out second stage employ, 180 ℃ the flue gas formed waste of must draining when having avoided independent use steam boiler, do not need to build again desulfurating dust removing device for flue gas yet, and because the hot blast of vapour generator that present technique supplies is cleaner, heat exchange efficiency is high, and operation power and working cost are all lower; During for wind mixed chamber, the low temperature hot blast that draws back with the low temperature hot blast that draws back from heat-condutive oil heat exchanger, from vapour generator and directly mix from the normal temperature air the atmosphere, thermosteresis is little, the hot blast that mixes is through the further udst separation of cyclonic separator group, the hot blast quality can satisfy the industrial production needs, can not affect quality product, after hot blast uses through spray-drier, sulfurous gas wherein and a small amount of dust are all absorbed by the liquid poly aluminium chloride, dust and content of sulfur dioxide are zero in the gas that discharges, and the gas temperature that system enters atmosphere is lower than 50 ℃.The heating equipment of this heat supply method is installed compact, and device structure is simple, takes up an area to lack, and is convenient to insulation, is convenient to operational management, reduced investment, and hot service efficiency is up to more than 90%; This heat supply method can provide multiple cleaning heat source simultaneously, can satisfy the large industrial production of poly aluminium chloride product and use; When adopting this heat supply method, produces in the heat supplying process and only have an exhaust outlet, and dust and sulfurous gas is zero release that environmental-protecting performance is very good.Present technique is not subjected to poly aluminium chloride to make the restriction of raw material, and producing with coal is common bituminous coal, is suitable for promoting the use of.
The technology of the present invention has following characteristics: 1, produce heat supplying process central heating, concentrated dust-removing, three heating systems share a burner and a dust settling chamber, only need a fire coal to park a little; Burner, dust settling chamber, wind mixed chamber, purification hot air chamber, heat-condutive oil heat exchanger, vapour generator and tornado dust collector take up an area and lack near installation, are convenient to insulation and daily administration.2, heating system can produce three kinds of cleaning heat sources, high temperature heat conductive oil, high-temperature steam and high-temperature hot-air simultaneously; It is clean hot blast that high temperature heat conductive oil and high-temperature steam are produced used high-temperature hot-air, the equipment heat exchange efficiency is high, and the heat interchanging area that needs is little, has reduced equipment volume and occupation area of equipment, and the low temperature hot blast after the heat exchange all carries out second stage employ, improved heat utilization efficiency; 3, dust and sulfurous gas are realized zero release, and the hot blast that produces in the heat supply production process is finally all guided to spray-drier and used, and only has an exhaust outlet.After high-temperature hot-air enters spray-drier, heat in the hot blast, sulfurous gas and a small amount of dust are atomized into very tiny poly aluminium chloride drop absorption cleaning, from spray-drier low temperature hot blast out, enter the acid mist recovery tower, cold water with atomizing in the acid mist recovery tower reclaims contained a small amount of poly aluminium chloride dust and sour gas in the hot blast, then it is entered atmosphere, enter that sulfurous gas and dust content are zero in the low temperature hot blast of atmosphere.4, this heat supply method can satisfy the needs of poly aluminium chloride industry industrialized production, production process is not subjected to the restriction of raw material and range of product, raw materials for production can be used the aluminum-containing raw materials such as bauxitic clay, calcium aluminate, aluminium hydroxide and sodium aluminate, produce product and comprise technical grade poly aluminium chloride, tap water level poly aluminium chloride and high-purity grade of white poly aluminium chloride etc.5, fuel used is common bituminous coal, 4500-7000kcal/kg, and the common bituminous coal of sulphur content 0-4% all can use.
In sum, the present invention is that a kind of heating system is concentrated, and heating efficiency is high, and poly aluminium chloride products production energy consumption is low, pollutes littlely, provides multiple cleaning heat source confession to prepare method and the device thereof of poly aluminium chloride when working cost is low.
Description of drawings
Fig. 1 is apparatus structure synoptic diagram of the present invention.
Embodiment
Following examples are intended to illustrate that the present invention rather than the present invention further limit, and embodiments of the present invention can be implemented in the described any mode of summary of the invention.
Referring to Fig. 1, coal burning machine 1 is provided with mucking machine 19, burner blower 20 and coaling machine 21, coal burning machine 1 is connected with high temperature purification chamber 2, high temperature purification chamber 2 is connected with and purifies hot air chamber 3, purify hot air chamber 3 and be connected with vapour generator 5 by the first valve 8, the vapour pipe of vapour generator 5 is connected with steam and divides drum 4, steam divides an outlet of drum 4 to lead to the poly-aluminium liquid workshop of roller drying, the poly-aluminium liquid workshop of spraying drying is led in another outlet, the hot blast end of vapour generator 5 adopts the first induced draft fan 6 to be connected with wind mixed chamber 7, purify hot air chamber 3 and connect wind mixed chamber 7 by second valve 9, wind mixed chamber 7 is provided with air intlet 29, purify hot air chamber 3 is connected with heat-condutive oil heat exchanger 11 by the 3rd valve 10 air intake, the outlet air end of heat-condutive oil heat exchanger 11 is connected with wind mixed chamber 7 by the second induced draft fan 12, wind mixed chamber 7 is connected with the air intake of spray-drier 14 by tornado dust collector 13, the outlet air end of spray-drier 14 is connected with the first acid mist recovery tower 15, the air outlet of the first acid mist recovery tower 15 is connected with the first chimney 18 by the 3rd induced draft fan 17, the drain side of the first acid mist recovery tower 15 is connected with the first recycle pump 16, the outlet of the first recycle pump 16 respectively with the first acid mist recovery tower 15 be connected aluminium liquid workshop and be connected, the deep fat end of heat-condutive oil heat exchanger 11 is connected with the heat exchange entrance end of roller dryer 26, the heat exchange exit end of roller dryer 26 is connected with thermal oil return tank 27, thermal oil return tank 27 is connected with the cold oil end of heat-condutive oil heat exchanger 11 by thermal oil transferpump 28, the air outlet of roller dryer 26 is connected with the second acid mist recovery tower 25, the air outlet of the second acid mist recovery tower 25 is connected with the second chimney 22 by the 4th induced draft fan 23, the outlet that the drain side of the second acid mist recovery tower 25 is connected with the second recycle pump 24, the second recycle pumps 24 respectively with the second acid mist recovery tower 25 be connected aluminium liquid workshop and be connected.
Referring to Fig. 1, provide simultaneously multiple cleaning heat source for the method for preparing poly aluminium chloride, step is as follows:
1) the clean high-temperature hot-air of preparation: coaling machine is delivered to the coal burning machine combustion chamber with fire coal, the coal-fired high-temperature hot-air that produces 600-900 ℃ in combustion chambers burn, burner blower is delivered to the high temperature purification chamber with hot blast and is purified, the exhaust gas volumn of leading to heat-condutive oil heat exchanger, vapour generator and wind mixed chamber by three high-temperature gate valve controls respectively after the purification, the properly distributed of assurance high-temperature flue gas;
2) heat-condutive oil heat exchanger heat supply: come the high-temperature hot-air of Self-air-heating decontamination chamber and the interior thermal oil of heat-condutive oil heat exchanger heating chamber boiler tube to carry out heat exchange, with heat-conducting oil heating to 350 ℃, high temperature heat conductive oil after the heating, as the roller dryer thermal source, from roller dryer low temperature deep fat out, return the heat-condutive oil heat exchanger heating chamber, carry out heat exchange with high-temperature hot-air again, recycle; Low temperature hot blast after the heat exchange carries out second stage employ through air inducing power traction back-mixing air compartment;
3) vapour generator heat supply: come the high-temperature hot-air heat of Self-air-heating decontamination chamber and the interior water of vapour generator heating chamber boiler tube to carry out heat exchange, it is 180 ℃ high-temperature steam that the water of vapour generator is heated to form temperature, be used for the production of liquid poly aluminium chloride, low temperature hot blast after the heat exchange carries out second stage employ through air inducing power traction back-mixing air compartment;
4) spray-drier heat supply: the high-temperature hot-air heat of coming the Self-air-heating decontamination chamber respectively with from the low temperature hot blast of heat-condutive oil heat exchanger, mix in wind mixed chamber from the low temperature hot blast of vapour generator with from the normal temperature air in the atmosphere, high-temperature hot-air after the mixing temperature adjustment from mixed hot cell out, carry out dry method dust through one group of cyclonic separator, hot blast after further purifying enters spray-drier, as the thermal source of liquid poly aluminium chloride drying;
5) the spray-drier hot blast purifies and vent gas treatment: after high-temperature hot-air enters spray-drier, heat in the hot blast, sulfurous gas and a small amount of dust are atomized into very tiny poly aluminium chloride drop absorption cleaning, from spray-drier low temperature hot blast out, enter the acid mist recovery tower, water with atomizing in the acid mist recovery tower reclaims contained a small amount of poly aluminium chloride dust in the hot blast, and further reduce the temperature of hot blast, then it is entered atmosphere, enter that sulfurous gas and dust content are zero in the low temperature hot blast of atmosphere, the hot water that the acid mist recovery tower reclaims is back to the production of liquid poly aluminium chloride.
Embodiment 1:
With 6000kcal/kg, the common bituminous coal of sulphur content 2% is fuel, per hour require to produce 3.5 tons of poly aluminium chlorides (amounting to solid phase prod), comprise and per hour produce 2.0 tons by the yellow product of technical grade (wherein 1.5 tons of products are dry with roller dryers, sell as liquid product for other 0.5 ton, do not need drying) and the light yellow poly aluminium chloride of tap water level per hour produce 1.5 tons, tap water level product is dry with spray-drier, technical grade poly aluminium chloride liquid oxidation aluminium content is 10%, basicity is 95%, tap water level poly aluminium chloride liquid oxidation aluminium content is 14.0%, and basicity is 75%.This total heat capacity in system combustion chamber is 5,300,000 kcal/ hours, the dry heat supplied that needs of roller dryer is 2,000,000 kcal/ hours, the heat supplied of liquid poly aluminium chloride need of production is 1,000,000 kcal/ hours, the heat supplied that spray-drier needs is 1,900,000 kcal/ hours, thermosteresis 400,000 kcal/ hours, total heat utilization efficiency is 92.5%, production process per hour consumes coal 884kg, wherein the dry coal consumption of roller dryer is ton product 222kg, the dry coal consumption of spray-drier is ton product 2 11kg, bituminous coal combustion produces sulphur content and is 17.7kg per hour, the poly aluminium chloride product of all being produced by spray-drier absorbs, and sulphur content is ton product 11.8kg in the product, accounts for 1.18%, form with calcium sulfite is present in the product, can not affect quality product.
Embodiment 2:
With 4500kcal/kg, the bituminous coal of sulphur content 4% is fuel, per hour require to produce 3.5 tons of poly aluminium chlorides (amounting to solid phase prod), comprise and per hour produce 2.0 tons by the yellow product of technical grade (wherein 1.5 tons of products are dry with roller dryers, sell as liquid product for other 0.5 ton, do not need drying) and high-purity grade of white products per hour produce 1.5 tons, high-purity poly aluminium chloride is dry with spray-drier, technical grade poly aluminium chloride liquid oxidation aluminium content is 10%, basicity is 95%, high-purity poly aluminium chloride liquid oxidation aluminium content is 18.0%, and basicity is 48%.This total heat capacity in system combustion chamber is 5,300,000 kcal/ hours, actual is 5,200,000 kcal/ hours with heat, the dry heat supplied that needs of roller dryer is 2,000,000 kcal/ hours, the heat supplied of liquid poly aluminium chloride need of production is 1,100,000 kcal/ hours, the heat supplied that spray-drier needs is 1,700,000 kcal/ hours, thermosteresis 400,000 kcal/ hours, total heat utilization efficiency is 92.3%, production process per hour consumes coal 1156kg, wherein the dry coal consumption of roller dryer is ton product 296.3kg, the dry coal consumption of spray-drier be ton product 2 51.9kg, and bituminous coal combustion produces sulphur content and is 46.3kg per hour, the poly aluminium chloride product absorption of all being produced by spray-drier, sulphur content is ton product 30.9kg in the product, account for 3.1%, be present in the product with the form of Tai-Ace S 150, can not affect quality product.
Embodiment 3:
With 5000kcal/kg, the bituminous coal of sulphur content 1% is fuel, per hour require to produce 3.5 tons of poly aluminium chlorides (amounting to solid phase prod), comprise and per hour produce 2.0 tons by the light yellow product of technical grade (wherein 1.5 tons of products are dry with roller dryers, sell as liquid product for other 0.5 ton, do not need drying) and high-purity grade of white products per hour produce 1.5 tons, high-purity poly aluminium chloride is dry with spray-drier, technical grade poly aluminium chloride liquid oxidation aluminium content is 12%, basicity is 89%, high-purity poly aluminium chloride liquid oxidation aluminium content is 18.5%, and basicity is 45%.This total heat capacity in system combustion chamber is 5,300,000 kcal/ hours, actual is 5,100,000 kcal/ hours with heat, the dry heat supplied that needs of roller dryer is 1,950,000 kcal/ hours, the heat supplied of liquid poly aluminium chloride need of production is 1,100,000 kcal/ hours, the heat supplied that spray-drier needs is 1,650,000 kcal/ hours, thermosteresis 400,000 kcal/ hours, total heat utilization efficiency is 92.2%, production process per hour consumes coal 1020kg, wherein the dry coal consumption of roller dryer is ton product 260kg, the dry coal consumption of spray-drier be a ton product 220kg, and bituminous coal combustion produces sulphur content and is 10.2kg per hour, the poly aluminium chloride product absorption of all being produced by spray-drier, sulphur content is ton product 6.8kg in the product, account for 0.7%, be present in the product with the form of Tai-Ace S 150, can not affect quality product.
The invention provides multiple cleaning heat source can 4500-7000kcal/kg for the method for preparing poly aluminium chloride, the common bituminous coal of sulphur content 0-4% acts as a fuel, the poly aluminium chloride raw materials can be used aluminum-containing raw material and the hydrochloric acid such as bauxitic clay, calcium aluminate, aluminium hydroxide and sodium aluminate, produces product and comprises technical grade poly aluminium chloride, tap water level poly aluminium chloride and high-purity grade of white poly aluminium chloride etc.; The cleaning heat source that produces comprises three kinds of high temperature heat conductive oil, high-temperature steam and high-temperature hot-airs etc., and coal-fired total heat utilization efficiency reaches more than 90%; Flue gas adopts final dusting, and for the first time dedusting is adopted the method for baffling dedusting in the high temperature purification chamber, and smoke content is less than 80mg/m after the dedusting
3, for the second time dedusting is adopted the method for cyclonic separation dedusting after wind mixed chamber, and smoke content is less than 40mg/m after the dedusting
3Flue gas desulfurization is in spray-drier, and with the liquid poly aluminium chloride absorption of atomizing, desulfuration efficiency reaches 100%, and the sulphur after the desulfurization is present in the poly aluminium chloride solid phase prod with compound form; From spray-drier low temperature hot blast out, contain a small amount of dust and sour gas, with acid mist recovery tower atomizing cold water spray-absorption, enter the hot blast temperature of atmosphere less than 50 ℃, sulfurous gas and dust content are zero.The present invention is not limited by poly aluminium chloride raw materials for production, production kind and industrial scale, is suitable for promoting the use of.
Claims (4)
1. one kind provides multiple cleaning heat source for the method for preparing poly aluminium chloride simultaneously, it is characterized in that: may further comprise the steps:
1) the clean high-temperature hot-air of preparation: the coal-fired high-temperature hot-air that produces 600-900 ℃ in the coal burning machine combustion chambers burn, burner blower is delivered to the high temperature purification chamber with hot blast and is purified, the exhaust gas volumn of leading to heat-condutive oil heat exchanger, vapour generator and wind mixed chamber by three high-temperature gate valve controls respectively after the purification, the properly distributed of assurance high-temperature flue gas;
2) heat-condutive oil heat exchanger heat supply: come the high-temperature hot-air of Self-air-heating decontamination chamber and the interior thermal oil of heat-condutive oil heat exchanger heating chamber boiler tube to carry out heat exchange, the heating thermal oil, high temperature heat conductive oil after the heating, as the roller dryer thermal source, from roller dryer low temperature deep fat out, return the heat-condutive oil heat exchanger heating chamber, carry out heat exchange with high-temperature hot-air again, recycle; Low temperature hot blast after the heat exchange carries out second stage employ through air inducing power traction back-mixing air compartment;
3) vapour generator heat supply: come the high-temperature hot-air heat of Self-air-heating decontamination chamber and the interior water of vapour generator heating chamber boiler tube to carry out heat exchange, water is heated into steam, be used for the production of liquid poly aluminium chloride, the low temperature hot blast after the heat exchange carries out second stage employ through air inducing power traction back-mixing air compartment;
4) spray-drier heat supply: the high-temperature hot-air heat of coming the Self-air-heating decontamination chamber respectively with from the low temperature hot blast of heat-condutive oil heat exchanger, mix in wind mixed chamber from the low temperature hot blast of vapour generator with from the normal temperature air in the atmosphere, high-temperature hot-air after the mixing temperature adjustment from mixed hot cell out, carry out dry method dust through one group of cyclonic separator, hot blast after further purifying enters spray-drier, as the thermal source of liquid poly aluminium chloride drying;
5) the spray-drier hot blast purifies and vent gas treatment: after high-temperature hot-air enters spray-drier, heat in the hot blast, sulfurous gas and a small amount of dust are atomized into very tiny poly aluminium chloride drop absorption cleaning, from spray-drier low temperature hot blast out, enter the acid mist recovery tower, water with atomizing in the acid mist recovery tower reclaims contained a small amount of poly aluminium chloride dust in the hot blast, and further reduce the temperature of hot blast, then it is entered atmosphere, enter that sulfurous gas and dust content are zero in the low temperature hot blast of atmosphere, the hot water that the acid mist recovery tower reclaims is back to the production of liquid poly aluminium chloride.
2. according to claim 1ly provide simultaneously multiple cleaning heat source for the method for preparing poly aluminium chloride, it is characterized in that: above-mentioned steps 2) heat-condutive oil heat exchanger is for pining for: the high-temperature hot-air that the coal burning machine combustion chamber produces enters the purification hot air chamber after the dedusting of high temperature purification chamber, then guide to the heat-condutive oil heat exchanger heating chamber by high-temperature gate valve, carry out heat exchange with thermal oil in the boiler tube, with heat-conducting oil heating to 350 ℃.
3. according to claim 1 and 2ly provide simultaneously multiple cleaning heat source for the method for preparing poly aluminium chloride, it is characterized in that: above-mentioned steps 3) vapour generator is for pining for: it is 180 ℃ high-temperature steam that the water of vapour generator is heated to form temperature, the thermal source that this steam is produced as the liquid poly aluminium chloride.
4. the device of multiple cleaning heat source for the method for preparing poly aluminium chloride that provide simultaneously claimed in claim 1 is provided, it is characterized in that: coal burning machine (1) is connected with high temperature purification chamber (2), described high temperature purification chamber (2) is connected with and purifies hot air chamber (3), described purification hot air chamber (3) is connected with vapour generator (5) by the first valve (8), the vapour pipe of described vapour generator (5) is connected with steam and divides drum (4), the hot blast end of described vapour generator (5) adopts the first induced draft fan (6) to be connected with wind mixed chamber (7), described purification hot air chamber (3) connects described wind mixed chamber (7) by second valve (9), described wind mixed chamber (7) is provided with air intlet (29), described purification hot air chamber (3) is connected with the air intake of heat-condutive oil heat exchanger (11) by the 3rd valve (10), the outlet air end of described heat-condutive oil heat exchanger (11) is connected with described wind mixed chamber (7) by the second induced draft fan (12), described wind mixed chamber (7) is connected with the air intake of spray-drier (14) by tornado dust collector (13), the outlet air end of described spray-drier (14) is connected with the first acid mist recovery tower (15), the air outlet of described the first acid mist recovery tower (15) is connected with the first chimney (18) by the 3rd induced draft fan (17), the drain side of described the first acid mist recovery tower (15) is connected with the first recycle pump (16), the outlet of described the first recycle pump (16) respectively with described the first acid mist recovery tower (15) be connected aluminium liquid workshop and be connected, the deep fat end of described heat-condutive oil heat exchanger (11) is connected with the heat exchange entrance end of roller dryer (26), the heat exchange exit end of described roller dryer (26) is connected with thermal oil return tank (27), described thermal oil return tank (27) is connected with the cold oil end of described heat-condutive oil heat exchanger (11) by thermal oil transferpump (28), the air outlet of described roller dryer (26) is connected with the second acid mist recovery tower (25), the air outlet of described the second acid mist recovery tower (25) is connected with the second chimney (22) by the 4th induced draft fan (23), the drain side of described the second acid mist recovery tower (25) is connected with the second recycle pump (24), the outlet of described the second recycle pump (24) respectively with described the second acid mist recovery tower (25) be connected aluminium liquid workshop and be connected.
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| CN104743591A (en) * | 2013-12-31 | 2015-07-01 | 重庆蓝洁广顺净水材料有限公司 | Energy-saving and environment-friendly production system of solid polyaluminium chloride by drying with conduction oil type drum |
| CN104743588B (en) * | 2013-12-31 | 2017-10-20 | 重庆蓝洁广顺净水材料有限公司 | The solid polyaluminium chloride process units of environment-protecting clean |
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| CN109990460A (en) * | 2019-04-08 | 2019-07-09 | 东莞市天伟节能环保技术有限公司 | A kind of circulating heat supply system and its heat supply method |
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