CN105329927A - Circulating mother liquor feeding device for producing aluminum oxide and feeding method - Google Patents
Circulating mother liquor feeding device for producing aluminum oxide and feeding method Download PDFInfo
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- CN105329927A CN105329927A CN201510912924.3A CN201510912924A CN105329927A CN 105329927 A CN105329927 A CN 105329927A CN 201510912924 A CN201510912924 A CN 201510912924A CN 105329927 A CN105329927 A CN 105329927A
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- Prior art keywords
- mother liquor
- static mixer
- circulating mother
- circulating
- groove
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
Abstract
The invention belongs to the technical field of aluminum oxide production, and particularly relates to a circulating mother liquor feeding device for producing aluminum oxide and a feeding method. According to the circulating mother liquor feeding device, a static mixer is horizontally installed on the top of a circulating mother liquor groove to make evaporation mother liquor and caustic soda liquid which come from an evaporator station enter from one end of the static mixer, the discharging position is 5 m or above higher than the tops of the mother liquor groove and a desilicication groove, circulating mother liquor automatically flows to the process of raw material grinding and predesilicification by means of residual pressure and a height difference, and the circulating mother liquor groove is only used for temporary storing when the evaporator station is shut down for maintenance. According to the circulating mother liquor feeding device and the feeding method, the process is simplified, the number of power devices is decreased, the energy is saved, the consumption is reduced, the workload of repair and maintenance is reduced, input of pipelines, valves, pipe fittings and the like is reduced, the investment is reduced, the construction investment can be reduced by about three million RMB, and the operating cost is reduced by about 5.65 million RMB.
Description
Technical field
The invention belongs to technical field of alumina production, be specifically related to a kind of alumina producing circulating mother liquor feed device and method of feeding.
Background technology
Circulating mother liquor feeder system in conventional aluminium oxide production technique mother liquid evaporation and liquid caustic soda is first sent in blending and mixing groove to carry out mixing preparation, allocate qualified mother liquor enter circulating mother liquor groove keep in, again by the discharging of circulating mother liquor trench bottom via circulating mother liquor pump delivery to raw material grinding mill and pre-desiliconizing workshop section, Figure of description Fig. 1 is shown in the technical process of conventional recycle mother liquor feeder system.
Along with the fast development of aluminum oxide industry, the continuous expansion of single line aluminum oxide scale, trough maximizes has become a kind of trend, and the increase of trough height and diameter makes the basis of blending and mixing groove make more complicated and invest corresponding increase; Because single line production capacity increases, the flow also corresponding increase of circulating mother liquor, working cost is corresponding increase also.
Meanwhile, the deceitful change of alumina market wind and cloud now, competition, saves energy and reduce the cost and becomes the effective way cut operating costs.
In sum, provide a kind of investment, simple to operate of reducing, energy-saving and cost-reducing circulating mother liquor feed device and method very necessary.
Summary of the invention
For prior art Problems existing, the invention provides a kind of alumina producing circulating mother liquor feed device and method of feeding, object reduces the facility investment of alumina producing, reduction power consumption, simplifies the operation.
The alumina producing circulating mother liquor feed device realizing the object of the invention comprises vaporizer, flash-pot, the first static mixer, the second static mixer, circulating mother liquor groove, lye vat, mother liquor tank and desiliconization slot; Wherein said vaporizer discharge port is connected by pipeline with flash-pot discharge port, pipeline is provided with the first mother liquid evaporation pump and the second mother liquid evaporation pump, first mother liquid evaporation pump is connected with the first static mixer opening for feed, and the first static mixer discharge port is connected with circulating mother liquor groove its top feed mouth and mother liquor tank its top feed mouth; Second mother liquid evaporation pump is connected with the second static mixer opening for feed, and the second static mixer discharge port is connected with circulating mother liquor groove its top feed mouth and desiliconization slot underfeed mouth; Described lye vat is connected with the first static mixer and the second static mixer opening for feed;
The first described static mixer and the second static mixer are arranged on circulating mother liquor groove top, circulating mother liquor trench bottom discharge port is connected with the second static mixer discharge port with the first static mixer discharge port by circulating mother liquor pump, the vertical direction difference of altitude >=5m of the first static mixer, the second static mixer and mother liquor tank and desiliconization slot.
Described circulating mother liquor groove quantity >=1, when arranging more than two circulating mother liquor grooves, is connected in series between circulating mother liquor groove, shares 1 ~ 2 circulating mother liquor pump.
Adopt above-mentioned alumina producing circulating mother liquor feed device to carry out the method for feed, carry out according to following steps:
The mother liquid evaporation coming from evaporator station final stage flash-pot is mixed in pipeline with the mother liquid evaporation coming from evaporator station last evaporator, be pumped in the first static mixer through the first mother liquid evaporation, second mother liquid evaporation is pumped in the second static mixer through mother liquid evaporation, alkali lye in lye vat is sent into the first static mixer and the second static mixer respectively through lye pump, in the first static mixer and the second static mixer, mixing obtains circulating mother liquor after mixing well, circulating mother liquor wherein in the first static mixer utilizes self overbottom pressure and difference of altitude from flowing to incoming stock grinder section in mother liquor tank, circulating mother liquor in second static mixer utilizes self overbottom pressure and difference of altitude to enter pre-desiliconizing workshop section from flowing in desiliconization slot,
Circulating mother liquor in the first described static mixer and the circulating mother liquor in the second static mixer are also admitted in circulating mother liquor groove as circulating mother liquor for subsequent use, when evaporator station parking maintenance, the circulating mother liquor for subsequent use in circulating mother liquor groove is sent in mother liquor tank and desiliconization slot.
Compared with prior art, feature of the present invention and beneficial effect are:
Alumina producing circulating mother liquor feed device of the present invention is groove top static mixer level being arranged on circulating mother liquor groove, make to enter from the top, one end of static mixer from the mother liquid evaporation of evaporator station and liquid caustic soda, and its discharging comparatively mother liquor tank and desiliconization slot top exceed more than 5m, circulating mother liquor utilizes overbottom pressure and the discrepancy in elevation to flow automatically to raw material grinding mill and pre-desiliconizing operation, circulating mother liquor groove is only used as buffer memory during evaporator station parking maintenance, static mixer in device and the concrete specification of circulating mother liquor groove and number of units are determined according to production capacity, according to production capacity needs, the present invention is in order to strengthen the buffer storage amount of circulating mother liquor, multiple circulating mother liquor groove series connection can also be used, static mixer discharge port is connected with multiple circulating mother liquor groove its top feed mouth, all circulating mother liquor groove discharge ports are connected with the discharge port of static mixer by circulating mother liquor pump, under normal circumstances, the total flux of mother liquid evaporation and alkali lye equals raw material grinding mill and pre-desiliconizing operation to the aggregate demand of circulating mother liquor, when the total flux of mother liquid evaporation and alkali lye produces fluctuation, especially when evaporator station washing or parking maintenance, directly by the circulating mother liquor that stores in circulating mother liquor groove by 1-2 circulating mother liquor pump delivery to static mixer discharge port, ensure that the feed of continous-stable.
Circulating mother liquor feed device of the present invention is close to raw material grinding mill and pre-desiliconizing workshop section in layout, to reduce duct length and Cemented filling resistance.
Circulating mother liquor feed device of the present invention and method of feeding, simplify flow process, reduce power-equipment quantity, save energy and reduce the cost, reduce the workload of repair and maintenance, reduce the input amount of pipeline, valves and fittings etc. simultaneously, investment reduction, construction investment about 3,000,000 yuan can be reduced, reduce operation cost about 5,650,000 yuan.
Accompanying drawing explanation
Fig. 1 is alumina producing circulating mother liquor feed schematic flow sheet in prior art;
Fig. 2 is the alumina producing circulating mother liquor feed device schematic diagram in the embodiment of the present invention;
Wherein: 1: V single-effect evaporator; 2: IV grades of flash-pots; 3-1: the first static mixer; 3-2: the second static mixer; 4-1: the first circulating mother liquor groove; 4-2: the second circulating mother liquor groove; 5: lye vat; 6: mother liquor tank; 7-1: the first desiliconization slot; 7-2: the second desiliconization slot; 8-1: the first mother liquid evaporation pump; 8-2: the second mother liquid evaporation pump; 9: circulating mother liquor pump; 10: lye pump.
Embodiment
Embodiment
The alumina producing circulating mother liquor feed device of the present embodiment as shown in Figure 2, is specifically described to have V single-effect evaporator, the evaporator station of IV grade of flash-pot and two circulating mother liquor grooves, 2 desiliconization slots.
The alumina producing circulating mother liquor feed device of the present embodiment comprises V single-effect evaporator 1, IV grade of flash-pot 2, first static mixer 3-1, second static mixer 3-2, two circulating mother liquor groove 4-1 and 4-2, lye vat 5, mother liquor tank 6 and two desiliconization slot 7-1 and 7-2;
IV grade of wherein said flash-pot 2 is connected by pipeline with V single-effect evaporator 1, pipeline is installed the first mother liquid evaporation pump 8-1 and the second mother liquid evaporation pump 8-2, first mother liquid evaporation pump 8-1 is connected with the first static mixer 3-1 opening for feed, and the first static mixer 3-1 discharge port is connected with the first circulating mother liquor groove 4-1, the second circulating mother liquor groove 4-2 its top feed mouth and mother liquor tank 6 its top feed mouth; Second mother liquid evaporation pump 8-2 is connected with the second static mixer 3-2 opening for feed, and the second static mixer 3-2 discharge port is connected with the first circulating mother liquor groove 4-1, the second circulating mother liquor groove 4-2 its top feed mouth and the first desiliconization slot 7-1, the second desiliconization slot 7-2 underfeed mouth; Described lye vat 5 is connected with the first static mixer 3-1 and the second static mixer 3-2 opening for feed;
The first described static mixer 3-1 and the second static mixer 3-2 is arranged on the first circulating mother liquor groove 4-1 and the second circulating mother liquor groove 4-2 top, connect between first circulating mother liquor groove 4-1 and the second circulating mother liquor groove 4-2, first circulating mother liquor groove 4-1 is connected with the second static mixer 3-2 discharge port with the first static mixer 3-1 discharge port by circulating mother liquor pump 9 with the second circulating mother liquor groove 4-2 bottom discharge mouth, first static mixer 3-1, second static mixer 3-2 and mother liquor tank 6 and the first desiliconization slot 7-1, vertical direction difference of altitude >=the 5m of the second desiliconization slot 7-2.
Adopt above-mentioned alumina producing circulating mother liquor feed device to carry out the method for feed, carry out according to following steps:
After the mother liquid evaporation coming from evaporator station IV grade of flash-pot 2 is mixed in pipeline with the mother liquid evaporation coming from evaporator station V single-effect evaporator 1, send in the first static mixer 3-1 through the first mother liquid evaporation pump 8-1 respectively, send in the second static mixer 3-2 through the second mother liquid evaporation pump 8-2, alkali lye in lye vat 5 is sent into the first static mixer 3-1 and the second static mixer 3-2 respectively through lye pump 10, in the first static mixer 3-1 and the second static mixer 3-2, mixing obtains circulating mother liquor after mixing well, circulating mother liquor wherein in the first static mixer 3-1 utilizes self overbottom pressure and difference of altitude from flowing to incoming stock grinder section in mother liquor tank 6, circulating mother liquor in second static mixer 3-2 utilizes self overbottom pressure and difference of altitude to enter pre-desiliconizing workshop section from flowing in the first desiliconization slot 7-1 and the second desiliconization slot 7-2,
Circulating mother liquor in the first described static mixer 3-1 and the circulating mother liquor in the second static mixer 3-2 are also admitted in the first circulating mother liquor groove 4-1 and the second circulating mother liquor groove 4-2 as circulating mother liquor for subsequent use, when evaporator station parking maintenance, circulating mother liquor for subsequent use in first circulating mother liquor groove 4-1 and the second circulating mother liquor groove 4-2 is sent in mother liquor tank 6 and the first desiliconization slot 7-1, the second desiliconization slot 7-2, to ensure the feed of continous-stable.
Claims (3)
1. an alumina producing circulating mother liquor feed device, is characterized in that device comprises vaporizer, flash-pot, the first static mixer, the second static mixer, circulating mother liquor groove, lye vat, mother liquor tank and desiliconization slot; Wherein said vaporizer discharge port is connected by pipeline with flash-pot discharge port, pipeline is provided with the first mother liquid evaporation pump and the second mother liquid evaporation pump, first mother liquid evaporation pump is connected with the first static mixer opening for feed, and the first static mixer discharge port is connected with circulating mother liquor groove its top feed mouth and mother liquor tank its top feed mouth; Second mother liquid evaporation pump is connected with the second static mixer opening for feed, and the second static mixer discharge port is connected with circulating mother liquor groove its top feed mouth and desiliconization slot underfeed mouth; Described lye vat is connected with the first static mixer and the second static mixer opening for feed;
The first described static mixer and the second static mixer are arranged on circulating mother liquor groove top, circulating mother liquor trench bottom discharge port is connected with the second static mixer discharge port with the first static mixer discharge port by circulating mother liquor pump, the vertical direction difference of altitude >=5m of the first static mixer, the second static mixer and mother liquor tank and desiliconization slot.
2. a kind of alumina producing circulating mother liquor feed device according to claim 1, is characterized in that described circulating mother liquor groove quantity >=1, when arranging more than two circulating mother liquor grooves, being connected in series between circulating mother liquor groove, shares 1 ~ 2 circulating mother liquor pump.
3. adopt alumina producing circulating mother liquor feed device as claimed in claim 1 to carry out a method for feed, it is characterized in that carrying out according to following steps:
The mother liquid evaporation coming from evaporator station final stage flash-pot is mixed in pipeline with the mother liquid evaporation coming from evaporator station last evaporator, be pumped in the first static mixer through the first mother liquid evaporation, second mother liquid evaporation is pumped in the second static mixer through mother liquid evaporation, alkali lye in lye vat is sent into the first static mixer and the second static mixer respectively through lye pump, in the first static mixer and the second static mixer, mixing obtains circulating mother liquor after mixing well, circulating mother liquor wherein in the first static mixer utilizes self overbottom pressure and difference of altitude from flowing to incoming stock grinder section in mother liquor tank, circulating mother liquor in second static mixer utilizes self overbottom pressure and difference of altitude to enter pre-desiliconizing workshop section from flowing in desiliconization slot,
Circulating mother liquor in the first described static mixer and the circulating mother liquor in the second static mixer are also admitted in circulating mother liquor groove as circulating mother liquor for subsequent use, when evaporator station parking maintenance, the circulating mother liquor for subsequent use in circulating mother liquor groove is sent in mother liquor tank and desiliconization slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510912924.3A CN105329927A (en) | 2015-12-11 | 2015-12-11 | Circulating mother liquor feeding device for producing aluminum oxide and feeding method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510912924.3A CN105329927A (en) | 2015-12-11 | 2015-12-11 | Circulating mother liquor feeding device for producing aluminum oxide and feeding method |
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| CN105329927A true CN105329927A (en) | 2016-02-17 |
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| CN201510912924.3A Pending CN105329927A (en) | 2015-12-11 | 2015-12-11 | Circulating mother liquor feeding device for producing aluminum oxide and feeding method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109592700A (en) * | 2018-12-18 | 2019-04-09 | 广西华银铝业有限公司 | A kind of method of alumina producer decomposing grading production continuous operation |
| CN113772701A (en) * | 2021-09-27 | 2021-12-10 | 国家电投集团山西铝业有限公司 | Application of additive for promoting bauxite dissolution and adding equipment |
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| CN202369407U (en) * | 2011-12-08 | 2012-08-08 | 贵阳铝镁设计研究院有限公司 | Heating device for alumina dissolution sleeve |
| CN103539174A (en) * | 2013-10-24 | 2014-01-29 | 杭州锦江集团有限公司 | Circulating mother liquor feed device and feeding method |
| CN105016365A (en) * | 2015-07-24 | 2015-11-04 | 中国铝业股份有限公司 | Salt discharging system and method in Bayer-process aluminium oxide production process |
| CN205258027U (en) * | 2015-12-11 | 2016-05-25 | 东北大学设计研究院（有限公司） | Oxidation aluminium production circulating mother liquor feedway |
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2015
- 2015-12-11 CN CN201510912924.3A patent/CN105329927A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202369407U (en) * | 2011-12-08 | 2012-08-08 | 贵阳铝镁设计研究院有限公司 | Heating device for alumina dissolution sleeve |
| CN103539174A (en) * | 2013-10-24 | 2014-01-29 | 杭州锦江集团有限公司 | Circulating mother liquor feed device and feeding method |
| CN105016365A (en) * | 2015-07-24 | 2015-11-04 | 中国铝业股份有限公司 | Salt discharging system and method in Bayer-process aluminium oxide production process |
| CN205258027U (en) * | 2015-12-11 | 2016-05-25 | 东北大学设计研究院（有限公司） | Oxidation aluminium production circulating mother liquor feedway |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109592700A (en) * | 2018-12-18 | 2019-04-09 | 广西华银铝业有限公司 | A kind of method of alumina producer decomposing grading production continuous operation |
| CN113772701A (en) * | 2021-09-27 | 2021-12-10 | 国家电投集团山西铝业有限公司 | Application of additive for promoting bauxite dissolution and adding equipment |
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Application publication date: 20160217 |
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