CN107140659B - The equipment and technique of a kind of 95% concentration potassium hydroxide of production - Google Patents
The equipment and technique of a kind of 95% concentration potassium hydroxide of production Download PDFInfo
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- CN107140659B CN107140659B CN201710439257.0A CN201710439257A CN107140659B CN 107140659 B CN107140659 B CN 107140659B CN 201710439257 A CN201710439257 A CN 201710439257A CN 107140659 B CN107140659 B CN 107140659B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D1/00—Oxides or hydroxides of sodium, potassium or alkali metals in general
- C01D1/04—Hydroxides
- C01D1/42—Concentration; Dehydration
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
- C01P2006/82—Compositional purity water content
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The equipment and technique of a kind of 95% concentration potassium hydroxide of production, belong to potassium hydroxide production equipment and process technical field, for carrying out steady production to 95% concentration potassium hydroxide.Its technical solution is：The former overflow groove structure of pans is changed to the double-deck overflow pipe structure, while increasing original equipment diameter, reduces influence degree of the stalk flash distillation liquid inlet volume to pans liquid level so that when flash tank establishes vacuum, pans liquid level is easier to control and keeps to stablize.The present invention is separately mounted to the liquid level gauge of line monitoring on pans and flash tank, and automatic control adjustable valve is installed respectively on the stalk and downspout between pans and flash tank, to control the alkali flow into flash tank, ensure the level stability under corresponding vacuum degree in pans 50%, this just completely avoids air and enters flash tank destruction vacuum from stalk bottom, thoroughly solves flash tank vacuum during vacuum is established and is easy broken and is unable to control this problem.
Description
Technical field
The present invention relates to it is a kind of production 95% concentration potassium hydroxide equipment and technique, belong to potassium hydroxide production equipment and
Technology field.
Background technology
Potassium hydroxide is one of basic chemical industry raw material, is widely used in following field：Produce the potassium such as potassium permanganate, potassium carbonate
Salt；In medical industry, for producing potassium boron hydrogen, antisterone, batyl alcohol, progesterone, testosterone propionate etc.；In light industry
In, for producing SOFT SOAP, alkaline battery, cosmetics；In dye industry, for producing reducing dye；In electrochemical industry,
For being electroplated, carving；In textile industry, it is used as printing and dyeing, bleaching and mercerising, and is largely used as manufacture staple fibre, is poly-
The primary raw material of ester fiber.In addition, also being answered in synthetic rubber, food additives, the metallurgical heating agent of fermentation, leather degreasing etc.
With.
Italian SET evaporation concentration techniques originate from 1973, and SET is devoted for years in the hair for being concentrated by evaporation industry technology
Especially there are oneself unique theory in exhibition, achievement throughout world various regions on piece the alkali eventually design of concentration falling film evaporator, it
Design be measured TEMA formulas shell-and-tube heat exchanger.It is simple in structure, it is easily operated, and the design of its flash system is unique,
Theory is advanced.One man is only had based on the design of this theory both at home and abroad at present.It includes pans（95% alkali tank）, flash tank, sudden strain of a muscle
Steam surface condenser, vacuum pump, fused salt storage tank, pump for liquid salts, molten alkali distributor.Its technical process is：
First by 48% potassium hydroxide solution of the low concentration indirect steam pre-concentration from whole concentration evaporator to concentration
For 53% potassium hydroxide solution, then with fused salt as heat carrier in whole concentration evaporator its concentration reaches after heating evaporation concentration
To 90%.
Then always 90% potassium hydroxide solution of concentration is located in the pans that dead weight flows into flash system in bottom admittedly
Between tank and linked together by stalk and downspout between the flash tank of eminence, into a concentration of 90% in pans
Vacuum of the potassium hydroxide solution in flash tank under the action of, entered after fused salt heats again by stalk in flash tank into
Row secondary flash, a concentration of 90% potassium hydroxide solution are finally condensed into always solid a concentration of 95% potassium hydroxide base by secondary flash
Liquid.
Then the potassium hydroxide solution of 95% concentration is turned again to by downspout in pans by liquid level difference, due to centre
The unique design of tank, 95% lye for overflowing back high concentration in pans again will not be with 90% alkali from whole concentration evaporator
Mixing, but directly overflow enters in molten alkali distributor, and it is cold that two flakers are respectively enterd after being distributed by molten alkali distributor
But sheeting, then scraped by scraper, enter packing machine through blanking bin, is sold as finished product after the weighed packaging of hydroxide flake potassium.
The indirect steam flashed off is misty by humidifying spraying nozzle penetrating except humidifier is entered after lixiviating foam by silk screen trap
Humidification water makes its full closes cool down, subsequently into recycling after being condensed in whole condensing surfaces condenser.
It finds in actual production, this technique is difficult to run steadily in the long term, and what problem appeared in vacuum establishes process
In, it is unable to control at all in practical operation.In practical operation, as vacuum degree gradually increases in flash tank, stalk and descending liquid
Intraluminal fluid face also steps up, and vacuum is increasing, every time can be in the wink of flash vaporization equilibrium foundation when reaching a certain critical value
Between due between pans and flash tank pressure difference it is excessive and lye moment in pans is made to be pumped, to by stalk bottom into
Entering air causes vacuum to be destroyed.Although theoretically the flow in stalk can be controlled by changing the value of vacuum degree,
Have little time to adjust at all to change liter liquid measure by adjusting vacuum degree in actual operation, vacuum just destroyed.And technology people
Member has found, when each vacuum breaker, the critical value of vacuum degree is also not fixed, one at a time numerical value, and without regularity, this may be by more
Kind of factor causes, such as temperature of molten salt and flow, pulling vacuum rate, by repeatedly producing as a trial, it is intended to by change vacuum degree come
Realization, which controls flash process, to be but difficult to reach, and controlling unit has apparent deficiency, at all can not in actual production
Accomplish continuous and steady operation.
So far, such case is not changed effectively, and actual production is difficult to stable operation, it would be highly desirable to be solved.
Invention content
Technical problem to be solved by the invention is to provide it is a kind of production 95% concentration potassium hydroxide equipment and technique, this
When the improved equipment of kind and technique can make flash tank establish vacuum, pans liquid level is easier to control and keeps to stablize, and keeps away
Exempt from air and enter flash tank destruction vacuum, production is made to realize continuous and steady operation.
Solving the technical solution of above-mentioned technical problem is：
A kind of equipment of 95% concentration potassium hydroxide of production, it includes pans, flash tank, flash distillation surface condenser, vacuum
Pump, fused salt storage tank, pump for liquid salts, molten alkali distributor, pans are connected with flash tank by stalk and downspout, flash tank
It is connected with flash distillation surface condenser, vacuum pump is connected with flash distillation surface condenser, and fused salt storage tank is connected into and out of pipeline
On stalk between pans and flash tank, the outlet of pans is connected by pipeline with molten alkali distributor, is improved
Place is that the upper isopipe and lower part overflow launder of its pans are changed to horizontal partition board, the periphery point of two partition boards respectively
It is not connected with the tank body circumferential inner wall of pans, has spout hole respectively on two partition boards, top is installed respectively on spout hole
Overflow pipe and lower part overflow pipe, top overflow pipe, lower part overflow pipe are vertical with the plate face of two partition boards respectively.
The equipment of 95% concentration potassium hydroxide of above-mentioned production is separately mounted to line monitoring on the pans and flash tank
Pans liquid level gauge and flash tank liquid level gauge, installation rises a liquid respectively on the stalk and downspout between pans and flash tank
Regulating valve and descending liquid regulating valve install secondary vapour teletransmission thermometer on secondary steam pipe line.
A kind of technique using 95% concentration potassium hydroxide equipment of above-mentioned production, it takes following steps to carry out：
A.90% alkali system is driven
Low-concentration hydrogen potassium oxide is heated through whole inspissator, and temperature reaches the hydrogen finally concentrated after 385 DEG C as a concentration of 90%
Potassium oxide solution；90% lye flows into pans upper layers by dead weight, flash system and is not turned at this time, lye is by pans upper layer
Top overflow pipe flow to pans middle level, in being flowed into again by the lower part overflow pipe in pans middle level after pans middle level liquid level is full
Jian Guan lower layers；It is flowed into molten alkali distributor by dead weight again, then enters back into each flaker, sheeting packaging；The items such as concentration
Index is sold after laboratory analysis is qualified as finished product；
B.95% alkali flash system drives to prepare
After 90% alkali system is driven normally, piece alkali does complete analysis, and the indices such as concentration are qualified, and nothing is produced through site inspection
It is abnormal, open flashing apparatus：First confirm that liter liquid regulating valve and descending liquid regulating valve Close All, electric tracing temperature is normal, fused salt
It is normal to heat valve opening；Be then turned on vacuum pump, by gradually close vacuum pump be emptied valve by the vacuum degree of flash tank improve to
90KPa, and keep vacustat in this numerical value；
C. it slowly opens and rises liquid regulating valve, 90% lye starts by the liter between pans and flash tank under vacuum
Liquid pipe rises, and is heated again through fused salt in stalk, enters back into flash tank and flashed, and rises liquid regulating valve to adjust
The liquid level on pans upper layer, control range 50% positive and negative 5%, to ensure that lye no longer enters middle level but all by rising by overflow pipe
Liquid pipe, which enters in flash tank, to be flashed；Lye after concentration increase is flowed into pans by downspout by descending liquid regulating valve
In middle level, the aperture of descending liquid regulating valve is subject in flash tank without liquid level, and descending liquid tune is increased if liquid level occurs in flash tank
Save the aperture of valve；
D. after the temperature of the secondary vapour teletransmission thermometer of flash tank starts raising, secondary vapour humidification penstock is opened, is adjusted
The temperature of secondary vapour teletransmission thermometer is to 120 DEG C；
E. after flash vaporization equilibrium is established normally, alkali temperature is gone out by 90% by raising temperature of molten salt and is improved to 400 DEG C, thus will
The concentration of 90% alkali is improved to 92% or more, and vacustat in flash tank is kept to exist in 90KPa, pans upper layer level stability
50% or so, it then notifies laboratory personnel to carry out the indices such as analytical test concentration, packs personnel after qualified and use 95% alkali bag instead
Start to pack.
The normal level of the technique of 95% concentration potassium hydroxide of above-mentioned production, the flash tank is 0%, the liquid of high liquid level warning
Position is 5%；The pressure normal value of flash tank is 10KPa (absolute pressure), and the pressure value of low pressure alarming is 9KPa (absolute pressure), alarm for high voltage
Pressure value be 11KPa (absolute pressure).
The beneficial effects of the invention are as follows：
Pans internal structure is transformed in the present invention, and the double-deck overflow pipe structure is changed to by original overflow groove structure,
Original equipment diameter is increased simultaneously, reduces influence degree of the stalk flash distillation liquid inlet volume to pans liquid level so that build in flash tank
When vertical vacuum, pans liquid level is easier to control and keeps to stablize.
The present invention is separately mounted to the liquid level gauge of line monitoring on pans and flash tank, and in pans and flash tank
Between stalk and downspout on automatic control adjustable valve is installed respectively, with control disengaging flash tank alkali flow, ensure corresponding
Vacuum degree under level stability in pans in 50%, flash tank without liquid level, this just completely avoids air from stalk
Bottom enters flash tank and destroys vacuum, thoroughly solves flash tank vacuum during vacuum is established and is easily destroyed and is unable to control
This problem.
Description of the drawings
Fig. 1 is the production equipment and process flow diagram of the present invention；
Fig. 2 is the structural schematic diagram of pans.
It is marked in figure as follows：Pans 1, flash tank 2, flash distillation surface condenser 3, vacuum pump 4, fused salt storage tank 5, pump for liquid salts
6, molten alkali distributor 7, liter liquid regulating valve 8, descending liquid regulating valve 9, pans liquid level gauge 10, flash tank liquid level gauge 11, secondary vapour
Teletransmission thermometer 12, vacuum pump are emptied valve 13, stalk 14, downspout 15, screen 16, partition board 17, top overflow pipe 18, lower part
Overflow pipe 19, inlet tube 20, outlet tube 21.
Specific implementation mode
The present invention 95% concentration potassium hydroxide of production equipment include pans 1, flash tank 2, flash distillation surface condenser 3,
Vacuum pump 4, fused salt storage tank 5, pump for liquid salts 6, molten alkali distributor 7.
It is shown in figure, the connection type of above equipment is that pans 1 pass through stalk 14 and downspout 15 with flash tank 2
It is connected, flash tank 2 is connected with flash distillation surface condenser 3, and vacuum pump 4 is connected with flash distillation surface condenser 3, fused salt storage tank
5 are connected into and out of pipeline on the shell side of the stalk 14 between pans 1 and flash tank 2, and the outlet of pans 1 passes through pipe
Road is connected with molten alkali distributor 7.
When establishing vacuum to solve flash tank 2 existing for existing equipment, 1 liquid level of pans, which is difficult to control, cannot keep steady
2 vacuum of flash tank is easy brokenly and uncontrollable two problems during fixed and vacuum is established, structure of the present invention to pans 1
It is improved with the control device of pans 1, flash tank 2.
It is shown in figure, 1 internal structure of pans is transformed in the present invention, and double-deck overflow is changed to by original overflow groove structure
Tube flowing structure, while original equipment diameter is increased, reduce influence degree of the stalk flash distillation liquid inlet volume to 1 liquid level of pans so that
When flash tank 2 establishes vacuum, 1 liquid level of pans is easier to control and keeps to stablize.
It is shown in figure, the upper isopipe and lower part overflow launder of pans 1 are changed to two horizontal partition boards 17, two partition boards
17 periphery is connected with the tank body circumferential inner wall of pans 1 respectively, there is spout hole respectively on two partition boards 17, on spout hole
Top overflow pipe 18 and lower part overflow pipe 19 be installed respectively, top overflow pipe 18, lower part overflow pipe 19 respectively with two partition boards 17
Plate face it is vertical.In production, 90% potassium hydroxide solution enters 1 upper layer of pans and flows to pans 1 by top overflow pipe 18
Middle level flows to lower layer by lower part overflow pipe 19 again after 1 middle level lye of pans is full, then flow in molten alkali distributor 7 certainly.
It is shown in figure, the present invention is easy broken to solve during vacuum is established 2 vacuum of flash tank and is unable to control this
One problem is mounted with control device on pans 1, flash tank 2, to control the alkali flow for entering flash tank 2, ensures in phase
Level stability under the vacuum degree answered in pans 1 is destroyed very with avoiding air to enter flash tank 2 from 14 bottom of stalk completely
It is empty.
It is shown in figure, the pans liquid level gauge 10 and flash tank liquid of line monitoring is separately mounted on pans 1 and flash tank 2
Position counts 11, is installed respectively on the stalk 14 and downspout 15 between pans 1 and flash tank 2 and rises liquid regulating valve 8 and descending liquid
Regulating valve 9.
After this structure, by adjusting a liter aperture for liquid regulating valve 8 and descending liquid regulating valve 9, to change pipeline
Drag losses, are finally reached 90% lye and enter after pans 1 and fully enter flash tank 2 using vacuum and no longer by overflow pipe stream
Enter 1 middle level of pans, 1 upper layer liquid level 50% of pans need only be controlled, ensure the liquid level in pans 1 under corresponding vacuum degree
Stablize 50%, this just completely avoids air and enters the destruction vacuum of flash tank 2 from 14 bottom of stalk.It is used in stalk 14
Lye after molten heat transfer salt heats again enters flash tank 2 and carries out flash evaporation and reaches 95%, then flows into centre by downspout 15
1 middle level of tank finally enters back into molten alkali distributor 7 by 19 overflow of lower part overflow pipe to 1 lower layer of pans.
It is shown in figure, the present invention to the secondary flash process of lye in order to preferably carry out Always Online" monitoring, also two
Secondary vapour teletransmission thermometer 12 is installed on secondary steam pipe line, has reached and flash process is controlled from flow control, Liquid level, pressure
To conduct monitoring at all levels such as temperature monitorings.
It is shown in figure, technological process of the invention is as follows：
A. 90% alkali system is driven
Low-concentration hydrogen potassium oxide is heated through whole inspissator, and temperature reaches the hydrogen finally concentrated after 385 DEG C as a concentration of 90%
Potassium oxide solution；90% lye flows into pans 1 upper layers by dead weight, flash system and is not turned at this time, lye is by pans 1
The top overflow pipe 18 of layer flows to the middle levels of pans 1, again by under the middle level of pans 1 after the middle level liquid levels of pans 1 is full
Portion's overflow pipe 19 flows into the lower layer of pans 1；It is flowed into molten alkali distributor 7 by dead weight again, then enters back into each flaker,
Sheeting is packed；The indices such as concentration are sold after laboratory analysis is qualified as finished product.
B.95% alkali flash system drives to prepare
After 90% alkali system is driven normally, piece alkali does complete analysis, and the indices such as concentration are qualified, without exception through site inspection,
Open flashing apparatus：First confirm that 9 Close All of liter liquid regulating valve 8 and descending liquid regulating valve, electric tracing temperature is normal, fused salt heating
Valve opening is normal；Be then turned on vacuum pump 4, by gradually close vacuum pump be emptied valve 13 by the vacuum degree of flash tank 2 improve to
90KPa, and keep vacustat in this numerical value.
C. it slowly opens and rises liquid regulating valve 8,90% lye starts by between pans 1 and flash tank 2 under vacuum
Stalk 14 rises, and is heated again through fused salt in stalk 14, enters back into flash tank 2 and flashed, and rises liquid regulating valve 8
To adjust the liquid level on 1 upper layer of pans, control range 50% positive and negative 5%, to ensure that lye no longer enters pans 1 by overflow pipe
Middle level but all by stalk 14 enter flash tank 2 in flashed；Lye after concentration increase is by potential difference by descending liquid
Pipe 15 is flowed by descending liquid regulating valve 9 in the middle level of pans 1, the aperture of descending liquid regulating valve 9 in flash tank 2 without liquid level
Subject to, the aperture of descending liquid regulating valve 9 is increased if liquid level occurs in flash tank 2.
D. after the temperature of the secondary vapour teletransmission thermometer of flash tank 12 starts raising, secondary vapour humidification penstock is opened, is adjusted
The temperature of secondary vapour teletransmission thermometer 12 is saved to 120 DEG C.
E. after flash vaporization equilibrium is established normally, 90% alkali is gone out by alkali temperature by raising temperature of molten salt and is improved to 400 DEG C, to
The concentration of 90% alkali is improved to 92% or more, keeps in flash tank 2 that for vacustat in 90KPa, the upper layer liquid level of pans 1 is steady
It is scheduled on 50% or so, then notifies laboratory personnel to carry out the indices such as analytical test concentration, starts to wrap with 95% alkali bag after qualified
Dress.
In the technique of 95% concentration potassium hydroxide of above-mentioned production, the normal level of the flash tank is 0%, high liquid level warning
Liquid level be 5%；The pressure normal value of flash tank is 10KPa (absolute pressure), and the pressure value of low pressure alarming is 9KPa (absolute pressure), high pressure
The pressure value of alarm is 11KPa (absolute pressure).
Claims (4)
1. a kind of equipment of 95% concentration potassium hydroxide of production, it includes pans（1）, flash tank（2）, flash distillation surface condenser
（3）, vacuum pump（4）, fused salt storage tank（5）, pump for liquid salts（6）, molten alkali distributor（7）, pans（1）With flash tank（2）Pass through
Stalk（14）And downspout（15）It is connected, flash tank（2）With flash distillation surface condenser（3）It is connected, vacuum pump（4）With sudden strain of a muscle
Steam surface condenser（3）It is connected, fused salt storage tank（5）Be connected to pans into and out of pipeline（1）And flash tank（2）Between
Stalk（14）On, pans（1）Outlet pass through pipeline and molten alkali distributor（7）It is connected, it is characterised in that：In it
Between tank（1）Upper isopipe and lower part overflow launder be changed to horizontal partition board respectively（17）, two partition boards（17）Periphery difference
With pans（1）Tank body circumferential inner wall be connected, in two partition boards（17）It is upper to have spout hole respectively, it is installed respectively on spout hole
Top overflow pipe（18）With lower part overflow pipe（19）, top overflow pipe（18）, lower part overflow pipe（19）Respectively with two partition boards
（17）Plate face it is vertical, the pans（1）And flash tank（2）On be separately mounted to line monitoring pans liquid level gauge（10）With
Flash tank liquid level gauge（11）, in pans（1）And flash tank（2）Between stalk（14）And downspout（15）It is upper to install respectively
Rise liquid regulating valve（8）With descending liquid regulating valve（9）.
2. the equipment of 95% concentration potassium hydroxide of production according to claim 1, it is characterised in that：On secondary steam pipe line
Secondary vapour teletransmission thermometer is installed（12）.
3. a kind of equipment using any one 95% concentration potassium hydroxide of production of claims 1 or 22 produces 95% concentration hydrogen
The technique of potassium oxide, it is characterised in that：It takes following steps to carry out：
A.90% alkali system is driven
Low-concentration hydrogen potassium oxide is heated through whole inspissator, and temperature reaches the hydroxide finally concentrated after 385 DEG C as a concentration of 90%
Potassium solution；90% lye flows into pans by dead weight（1）Upper layer flash system and is not turned at this time, and lye is by pans（1）On
The top overflow pipe of layer（18）Flow to pans（1）Middle level, pans（1）Middle level liquid level it is full after again by pans（1）'s
The lower part overflow pipe in middle level（19）Flow into pans（1）Lower layer；Again molten alkali distributor is flowed by dead weight（7）It is interior, then
Enter back into each flaker, sheeting packaging；The indices such as concentration are sold after laboratory analysis is qualified as finished product；
B.95% alkali flash system drives to prepare
After 90% alkali system is driven normally, piece alkali does complete analysis, and the indices such as concentration are qualified, without exception through site inspection production,
Open flashing apparatus：First confirm that a liter liquid regulating valve（8）With descending liquid regulating valve（9）Close All, electric tracing temperature is normal, fused salt
It is normal to heat valve opening；It is then turned on vacuum pump（4）, valve is emptied by gradually closing vacuum pump（13）By flash tank（2）It is true
Reciprocal of duty cycle is improved to 90KPa, and keeps vacustat in this numerical value；
C. it slowly opens and rises liquid regulating valve（8）, under vacuum 90% lye start by pans（1）And flash tank（2）Between
Stalk（14）Rise, in stalk（14）It is interior to be heated again through fused salt, then into flash tank（2）Inside flashed,
Rise liquid regulating valve（8）To adjust pans（1）The liquid level on upper layer, control range 50% positive and negative 5%, to ensure lye no longer by overflowing
Flow tube enters pans（1）Middle level but all by stalk（14）Into flash tank（2）Inside flashed；After concentration increase
Lye by potential difference by downspout（15）Pass through descending liquid regulating valve（9）It is flowed into pans（1）Middle level in, descending liquid regulating valve
（9）Aperture with flash tank（2）It is interior not have subject to liquid level, if flash tank（2）There is liquid level and then increases descending liquid regulating valve（9）'s
Aperture；
D. when the secondary vapour teletransmission thermometer of flash tank（12）Temperature start raising after, open secondary vapour humidification penstock, adjust
Secondary vapour teletransmission thermometer（12）Temperature to 120 DEG C；
E. after flash vaporization equilibrium is established normally, alkali temperature is gone out by 90% by raising temperature of molten salt and is improved to 400 DEG C, thus by 90% alkali
Concentration improve to 92% or more, keep flash tank（2）Interior vacustat is in 90KPa, pans（1）Upper layer level stability
50%, laboratory personnel is then notified to carry out the indices such as analytical test concentration, 95% alkali bag starts to pack after qualification.
4. the technique of 95% concentration potassium hydroxide of production according to claim 3, it is characterised in that：The flash tank is just
Normal liquid level is 0%, and the liquid level of high liquid level warning is 5%；The pressure normal value of flash tank is 10KPa absolute pressures, the pressure of low pressure alarming
Value is 9KPa absolute pressures, and the pressure value of alarm for high voltage is 11KPa absolute pressures.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710439257.0A CN107140659B (en) | 2017-06-12 | 2017-06-12 | The equipment and technique of a kind of 95% concentration potassium hydroxide of production |
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| CN201710439257.0A CN107140659B (en) | 2017-06-12 | 2017-06-12 | The equipment and technique of a kind of 95% concentration potassium hydroxide of production |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108314059A (en) * | 2018-03-08 | 2018-07-24 | 苏州天沃环境能源工程有限公司 | Dense effect in solid caustic soda production equipment concentrates mechanism |
| CN112225229B (en) * | 2020-10-21 | 2023-04-07 | 华融化学股份有限公司 | Method for preparing high-purity potassium hydroxide solution by microwave heating and concentration |
| CN112743063B (en) * | 2020-12-29 | 2022-04-08 | 上海交通大学 | Exposed heating type lift tube |
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| CN107140659A (en) | 2017-09-08 |
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