CN203173836U - Anhydrous sodium sulphate preparing device - Google Patents
Anhydrous sodium sulphate preparing device Download PDFInfo
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- CN203173836U CN203173836U CN 201320068135 CN201320068135U CN203173836U CN 203173836 U CN203173836 U CN 203173836U CN 201320068135 CN201320068135 CN 201320068135 CN 201320068135 U CN201320068135 U CN 201320068135U CN 203173836 U CN203173836 U CN 203173836U
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- sodium sulfate
- water
- glass gall
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- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 title abstract description 27
- 229910052938 sodium sulfate Inorganic materials 0.000 title abstract 18
- 235000011152 sodium sulphate Nutrition 0.000 title abstract 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000001704 evaporation Methods 0.000 claims abstract description 25
- 230000008020 evaporation Effects 0.000 claims abstract description 18
- 238000003860 storage Methods 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 238000002360 preparation method Methods 0.000 claims abstract description 14
- 239000002002 slurry Substances 0.000 claims abstract description 4
- 239000011521 glass Substances 0.000 claims description 44
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 34
- 239000007788 liquid Substances 0.000 claims description 16
- 239000004984 smart glass Substances 0.000 claims description 13
- 229940056729 sodium sulfate anhydrous Drugs 0.000 claims description 12
- 238000007601 warm air drying Methods 0.000 claims description 11
- 238000003828 vacuum filtration Methods 0.000 claims description 10
- 239000006228 supernatant Substances 0.000 claims description 8
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 5
- 239000012452 mother liquor Substances 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 239000000428 dust Substances 0.000 abstract description 3
- 238000007602 hot air drying Methods 0.000 abstract 1
- 238000009875 water degumming Methods 0.000 abstract 1
- 239000000047 product Substances 0.000 description 8
- 238000001914 filtration Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000005352 clarification Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 230000002950 deficient Effects 0.000 description 4
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000011575 calcium Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model discloses an anhydrous sodium sulphate preparing device, and belongs to the field of anhydrous sodium sulphate preparation. An anhydrous sodium sulphate preparing method sequentially comprises the following steps: preparing crude sodium sulfate water into refined sodium sulfate water; dehydrating the refined sodium sulfate water into dry sodium sulfate; and preparing the dry sodium sulfate into finished sodium sulfate. The anhydrous sodium sulphate preparing device comprises a sodium sulfate water reacting and clarifying device, a slurry clarifying device, a valve-free filter, a drum-type vacuum filter, a refined sodium sulfate water storage device, a steam generating device, a multi-effect evaporation tank, a centrifuge, an atmospheric condenser, a cooling tower, a circulating water pump, a Roots water ring vacuum unit, hot air drying equipment, a conveying device, a pneumatic hoister, a sodium sulfate storage bin and a bag-type dust remover. According to the utility model, the sodium sulphate water refining efficiency is higher, and he sodium sulphate water is higher in quality and can be fully recycled; during preparation, the heat utilization ratio is high, so that the energy consumption is low; and the finished sodium sulfate conveying speed is high, so that the finished sodium sulfate is high in yield.
Description
Technical field
The utility model belongs to the Sodium sulfate anhydrous.min(99) preparation field.
Background technology
The production unit that Sodium sulfate anhydrous.min(99) manufacturing is at present adopted exists in the production process that the glass gall waste is big, energy consumption is high, maintenance of equipment cost height, causes environmental pollution easily.The concrete steps of its preparation method are:
1. at first, the former glass gall that comes is stamped in the mine carried out preheating, remove impurity, the glass gall after the processing is removed suspended substance through sand-bed filter then through the clarification of swash plate settler, beats to smart glass gall bucket again;
2. the processing of the calcium mud after the clarification of swash plate settler now mainly contains dual mode at present: first mode directly is disposed to wastewater disposal basin and beats to the mine; The second way is carried out solid-liquid separation by plate-and-frame filter press to calcium magnesium mud, and gained calcium magnesium body refuse is transported to barrow, and filtrate is beaten to wastewater disposal basin, delivers to the mine and is used for molten saltcake ore deposit;
3. smart glass gall is beaten to pumper, carries out evaporation operation, present domestic most employing multiple-effect evaporation, and what wherein extracting vacuum adopted is to steam spray-water jet vacuum system;
4. the nitre of heating evaporation gained is starched dried dried nitre and is delivered to dried nitre warehouse through the belt conveyor bridge, then the packing warehouse-in.
There are numerous shortcomings in such scheme:
1. at first, with regard to glass gall is handled, adopt swash plate settler, sand-bed filter and plate-and-frame filter press, main defective is that occupation area of equipment is big, the equipment investment cost height, and the maintenance cost height, the glass gall waste is big during swash plate settler blowdown simultaneously.Leakiness sand during the sand-bed filter back flushing, and maintenance cost is higher, and labour intensity is big, and easy contaminate environment.
2. then, in vapo(u)rization system, what extracting vacuum adopted is the spray-water jet vacuum system of steaming, and the defective that this system exists mainly comprises:
Need consume steam during 1) owing to this system job, energy consumption is bigger;
2) equipment is perishable in actual production process, vacuum phenomenon takes place to leak easily, and then influence is produced.
3. for the delivery technology of finished product nitre, common method is the rotary conveyor trestle at present, and the major defect of this method is that the skin transportation send the technology floor space big, cost of investment height, and the easy contaminate environment of thin nitre dust when sending.
The utility model content
The purpose of this utility model is: propose a kind of Sodium sulfate anhydrous.min(99) preparation facilities, its glass gall purification efficiency is higher, the glass gall better quality, and glass gall can fully be recycled; Heat energy utilization rate height in the production, production energy consumption is low; The transmission speed of finished product nitre is fast, the output height.
The utility model purpose realizes by following technical proposals:
A kind of Sodium sulfate anhydrous.min(99) prepares equipment, comprise glass gall reaction clarifying plant, the mud clarifying plant, the valveless water filter device, the rotating drum vacuum filtration device, smart glass gall storing unit, steam-generating installation, the multiple-effect evaporation jar, whizzer, barometric condenser, cooling tower, water circulating pump, Roots's water ring vacuum unit, warm air drying equipment, e Foerderanlage, penumatic elevator, storage nitre storehouse and sack cleaner, the supernatant liquid outlet of described glass gall reaction clarifying plant is communicated with the entrance of described valveless water filter device, the outlet of described valveless water filter device is communicated with smart glass gall storing unit, the turbid liquid outlet of the lower floor of described glass gall reaction clarifying plant is communicated with described mud clarifying plant entrance, the supernatant liquid outlet of described mud clarifying plant is communicated with the entrance of described valveless water filter device, lower floor's mud outlet of described mud clarifying plant is communicated with described rotating drum vacuum filtration device entrance, and the purified liquor outlet of described rotating drum vacuum filtration device is communicated with described valveless water filter device entrance; The glass gall outlet of described smart glass gall storing unit is communicated to described multiple-effect evaporation jar, the nitre slurry outlet of described multiple-effect evaporation jar is communicated with described whizzer, the mother liquor outlet of described whizzer is communicated to the glass gall entrance of described multiple-effect evaporation jar, the wet nitre outlet of described whizzer is communicated with described warm air drying equipment, described steam-generating installation provides steam for described multiple-effect evaporation jar and described warm air drying equipment, the dried nitre outlet of described warm air drying equipment is communicated to described e Foerderanlage, the dried nitre outlet of described e Foerderanlage is communicated to described penumatic elevator, the dried nitre outlet of described penumatic elevator is communicated to described storage bin, and described storage bin is provided with pneumatic outlet and is communicated to described sack cleaner; Described barometric condenser, cooling tower and water circulating pump are linked in sequence and constitute a circulating water system, the vapour outlet that evaporator room is imitated at the end of described multiple-effect evaporation jar last step is communicated with the steam-in of described barometric condenser, and the pneumatic outlet of described barometric condenser is communicated with described Roots's water ring vacuum unit gas inlet.
As optimal way, also be provided with the recirculated water water reservoir between described cooling tower and the water circulating pump.
In the such scheme, by the daily accumulation of recirculated water water reservoir, put aside sufficient water coolant, avoid cooling tower water coolant under some situation can't satisfy the needs of the abundant condensation of barometric condenser; And the recirculated water water reservoir also can play further cooling effect; Ji Xu water also can use for other equipment simultaneously, achieves many things at one stroke.
As optimal way, the turbid liquid outlet of the lower floor of described glass gall reaction clarifying plant is communicated with described mud clarifying plant entrance by slush pump.
As optimal way, described warm air drying equipment is fluidized-bed.
In the such scheme, fluidized-bed is in order to dry wet nitre, and penumatic elevator is air conveying after being convenient to.
As optimal way, described e Foerderanlage is worm conveyor.
In the such scheme, worm conveyor is convenient to the air conveying of penumatic elevator in order to dried nitre is sent in the penumatic elevator.
As optimal way, described pneumatic outlet is located at described storage bin top.
In the such scheme, fall to carrying out final gas solid separation according to rising naturally of air-flow and material.
The beneficial effects of the utility model:
1. with regard to glass gall is handled, environmental pollution is little, efficient recovery glass gall more, reclaim glass gall quality height, and reduced investment in production equipment cost and maintenance cost, saved plant area the occupation of land space, produce in good filtration effect, filtration yield is big, operate more convenient, as to have solved sump pump obstruction problem, be conducive to produce, more economical.This device is according to product characteristics and the various apparatus features of different steps separating and filtering, it is divided into three-stage filtration separates, and specific corollary apparatus is combined with specific separation phase, realize separating and filtering effect and the device maximum using of synergy the best down: the supernatant liquid recovery glass gall after the valveless water filter device filters after the glass gall reaction clarification of one-level; The turbid liquid of lower floor after the glass gall reaction clarification of secondary is through after clarifying again, and its supernatant liquid reclaims glass gall after described valveless water filter device filters; Lower floor's mud after three grades the clarification again is after the rotating drum vacuum filtration device filters, the clear liquid of output reclaims glass gall after described valveless water filter device filters, the calcium magnesium mud of output enters subsequent disposal, has further guaranteed the efficient recovery of glass gall processing efficiency, glass gall quality and glass gall.In addition, it is big also to have overcome swash plate settler, sand-bed filter and plate-and-frame filter press occupation area of equipment, equipment investment cost height, maintenance cost height, leakiness sand when adopting the alternative sand-bed filter of valveless water filter device to avoid the sand-bed filter back flushing simultaneously, the defective that the glass gall waste is big;
2. in the vapo(u)rization system, adopt the combination of Roots-water ring vacuum unit and barometric condenser and circulating water system, take out noncondensable gas, make vacuum environment, improved the heat-transfer effect of heating chamber greatly, and Roots-water ring vacuum system has corrosion resistant characteristic, longer service life, maintenance cost is low, and rate of air sucked in required is big, energy consumption is low, more economical, more environmental protection;
3. for the e Foerderanlage of finished product nitre, it is big to have overcome occupation area of equipment, defectives such as cost of investment height, penumatic elevator has also that fed distance is far away, speed is fast, adjustability is strong, and is simple to operate stable, the advantage of maintenance free, in addition, for the recycling of thin nitre, avoided environmental pollution, environmental protection and economy.
Description of drawings
Fig. 1 is the device schematic flow sheet of the utility model embodiment;
Fig. 2 is the device schematic flow sheet of the smart glass gall of former glass gall system of the utility model embodiment;
Fig. 3 is the device schematic flow sheet of the multiple-effect evaporation jar vacuum-evaporation of the utility model embodiment;
Fig. 4 is the device schematic flow sheet of the dried taw finished product nitre of the utility model embodiment.
Embodiment
Following non-limiting examples is used for explanation the utility model.
Shown in Fig. 1 to 4, a kind of preparation equipment for aforementioned Sodium sulfate anhydrous.min(99) preparation method comprises glass gall reaction clarifying plant (preferred glass gall reaction settling tank), mud clarifying plant (preferred mud tank), the valveless water filter device, the rotating drum vacuum filtration device, smart glass gall storing unit (preferred smart glass gall bucket), steam-generating installation (preferred boiler), multiple-effect evaporation jar (preferred V is imitated evaporating pot), whizzer, barometric condenser, cooling tower, the recirculated water water reservoir, water circulating pump, Roots's water ring vacuum unit, warm air drying equipment (preferred fluidized-bed), e Foerderanlage (preferred worm conveyor), penumatic elevator, storage nitre storehouse and sack cleaner.As shown in Figure 2, (glass gall enters glass gall reaction clarifying plant to the former glass gall that the saltcake mineral products go out after the preheating of glass gall primary heater unit, add alkali and remove Ca in glass gall reaction clarifying plant through the reaction clarification
2+, Mg
2+Deng impurity) after, the supernatant liquid outlet of glass gall reaction settling tank is communicated with the entrance of valveless water filter device, the outlet of valveless water filter device is communicated with smart glass gall bucket, the turbid liquid outlet of the lower floor of glass gall reaction settling tank is communicated with the mud tank entrance by slush pump, the supernatant liquid outlet of mud tank is communicated with the entrance of valveless water filter device, lower floor's mud outlet of mud tank is communicated with rotating drum vacuum filtration device entrance, and the purified liquor outlet of rotating drum vacuum filtration device is communicated with valveless water filter device entrance; The glass gall outlet of smart glass gall bucket is communicated to V and imitates evaporating pot, the nitre slurry outlet that V is imitated evaporating pot is communicated with whizzer, the mother liquor outlet of whizzer is communicated to the glass gall entrance that V is imitated evaporating pot, and the wet nitre outlet of whizzer is communicated with fluidized-bed, and the hot blast sheet that boiler is imitated evaporating pot and fluidized-bed for V provides steam; As shown in Figure 4, the dried nitre outlet of fluidized-bed is communicated to worm conveyor, the dried nitre outlet of worm conveyor is communicated to penumatic elevator, the dried nitre outlet of penumatic elevator is communicated to storage bin, storage bin is provided with pneumatic outlet and is communicated to sack cleaner, pneumatic outlet is located at the storage bin top (in this process, wet nitre is earlier behind fluidised bed drying, be delivered to penumatic elevator through worm conveyor, carried by penumatic elevator, be promoted to storage nitre storehouse, finished product nitre powder falls to depositing back packing warehouse-in in the storage bin, the gas of penumatic elevator generation simultaneously carries the thinner finished product nitre dust of part and enters sack cleaner by pneumatic outlet, by the filtration of sack cleaner, thin nitre is recycled, and the gas after the filtration enters atmosphere).As shown in Figure 3, barometric condenser, cooling tower, recirculated water water reservoir and water circulating pump are linked in sequence and constitute a circulating water system, the vapour outlet that V is imitated the end effect evaporator room of evaporating pot last step is communicated with the steam-in of barometric condenser, the pneumatic outlet of barometric condenser is communicated with (in this process with Roots's water ring vacuum unit gas inlet, in barometric condenser, produce negative pressure of vacuum by Roots's water ring vacuum unit, impel the I that steam is imitated evaporating pot from V to imitate the V effect evaporator room that evaporator room flow to last step efficiently, enter condensation formation water of condensation in the barometric condenser then, gas enters atmosphere by Roots's water ring vacuum unit, water of condensation in recirculated water water reservoir savings and further cooling, reenters barometric condenser by water circulating pump at last and continues circulation after the cooling tower cooling simultaneously).
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (6)
1. Sodium sulfate anhydrous.min(99) preparation facilities, it is characterized in that: comprise glass gall reaction clarifying plant, the mud clarifying plant, the valveless water filter device, the rotating drum vacuum filtration device, smart glass gall storing unit, steam-generating installation, the multiple-effect evaporation jar, whizzer, barometric condenser, cooling tower, water circulating pump, Roots's water ring vacuum unit, warm air drying equipment, e Foerderanlage, penumatic elevator, storage nitre storehouse and sack cleaner, the supernatant liquid outlet of described glass gall reaction clarifying plant is communicated with the entrance of described valveless water filter device, the outlet of described valveless water filter device is communicated with smart glass gall storing unit, the turbid liquid outlet of the lower floor of described glass gall reaction clarifying plant is communicated with described mud clarifying plant entrance, the supernatant liquid outlet of described mud clarifying plant is communicated with the entrance of described valveless water filter device, lower floor's mud outlet of described mud clarifying plant is communicated with described rotating drum vacuum filtration device entrance, and the purified liquor outlet of described rotating drum vacuum filtration device is communicated with described valveless water filter device entrance; The glass gall outlet of described smart glass gall storing unit is communicated to described multiple-effect evaporation jar, the nitre slurry outlet of described multiple-effect evaporation jar is communicated with described whizzer, the mother liquor outlet of described whizzer is communicated to the glass gall entrance of described multiple-effect evaporation jar, the wet nitre outlet of described whizzer is communicated with described warm air drying equipment, described steam-generating installation provides steam for described multiple-effect evaporation jar and described warm air drying equipment, the dried nitre outlet of described warm air drying equipment is communicated to described e Foerderanlage, the dried nitre outlet of described e Foerderanlage is communicated to described penumatic elevator, the dried nitre outlet of described penumatic elevator is communicated to described storage bin, and described storage bin is provided with pneumatic outlet and is communicated to described sack cleaner; Described barometric condenser, cooling tower and water circulating pump are linked in sequence and constitute a circulating water system, the vapour outlet that evaporator room is imitated at the end of described multiple-effect evaporation jar last step is communicated with the steam-in of described barometric condenser, and the pneumatic outlet of described barometric condenser is communicated with described Roots's water ring vacuum unit gas inlet.
2. Sodium sulfate anhydrous.min(99) preparation facilities as claimed in claim 1 is characterized in that: also be provided with the recirculated water water reservoir between described cooling tower and the water circulating pump.
3. Sodium sulfate anhydrous.min(99) preparation facilities as claimed in claim 1 is characterized in that: the turbid liquid outlet of the lower floor of described glass gall reaction clarifying plant is communicated with described mud clarifying plant entrance by slush pump.
4. Sodium sulfate anhydrous.min(99) preparation facilities as claimed in claim 1, it is characterized in that: described warm air drying equipment is fluidized-bed.
5. Sodium sulfate anhydrous.min(99) preparation facilities as claimed in claim 1, it is characterized in that: described e Foerderanlage is worm conveyor.
6. Sodium sulfate anhydrous.min(99) preparation facilities as claimed in claim 1, it is characterized in that: described pneumatic outlet is located at described storage bin top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320068135 CN203173836U (en) | 2013-02-06 | 2013-02-06 | Anhydrous sodium sulphate preparing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320068135 CN203173836U (en) | 2013-02-06 | 2013-02-06 | Anhydrous sodium sulphate preparing device |
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| CN203173836U true CN203173836U (en) | 2013-09-04 |
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| CN 201320068135 Expired - Fee Related CN203173836U (en) | 2013-02-06 | 2013-02-06 | Anhydrous sodium sulphate preparing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103086403A (en) * | 2013-02-06 | 2013-05-08 | 四川省洪雅青衣江元明粉有限公司 | Anhydrous sodium sulfate preparation method and anhydrous sodium sulfate preparation apparatus |
| CN106219576A (en) * | 2016-07-13 | 2016-12-14 | 四川省洪雅青衣江元明粉有限公司 | Essence glass gall multi-effect evaporating device and method |
| CN107651696A (en) * | 2017-10-27 | 2018-02-02 | 四川省洪雅青衣江元明粉有限公司 | It is a kind of using single-action and the glauber salt production system and method for mechanical hot pressing contracting technology |
-
2013
- 2013-02-06 CN CN 201320068135 patent/CN203173836U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103086403A (en) * | 2013-02-06 | 2013-05-08 | 四川省洪雅青衣江元明粉有限公司 | Anhydrous sodium sulfate preparation method and anhydrous sodium sulfate preparation apparatus |
| CN106219576A (en) * | 2016-07-13 | 2016-12-14 | 四川省洪雅青衣江元明粉有限公司 | Essence glass gall multi-effect evaporating device and method |
| CN107651696A (en) * | 2017-10-27 | 2018-02-02 | 四川省洪雅青衣江元明粉有限公司 | It is a kind of using single-action and the glauber salt production system and method for mechanical hot pressing contracting technology |
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