CN209612230U - Corrosion-resistant falling film evaporator and dilute sulfuric acid concentration systems - Google Patents
Corrosion-resistant falling film evaporator and dilute sulfuric acid concentration systems Download PDFInfo
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- CN209612230U CN209612230U CN201920145893.7U CN201920145893U CN209612230U CN 209612230 U CN209612230 U CN 209612230U CN 201920145893 U CN201920145893 U CN 201920145893U CN 209612230 U CN209612230 U CN 209612230U
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Abstract
The utility model provides a kind of corrosion-resistant falling film evaporator and dilute sulfuric acid concentration systems.The corrosion-resistant falling film evaporator includes top cover, liquid collecting room and shell, is equipped with upper perforated plate, lower perforated plate and evaporation tube in the accommodating cavity of the shell.The dilute sulfuric acid concentration systems include dilute sulfuric acid storage tank, corrosion-resistant falling film evaporator, acid water vapor condenser, acid water accumulator tank and finished product acid storage tank.The dilute sulfuric acid concentration systems can be according to demand by the sulphuric acid concentration of 95% any concentration below to required concentration, and equipment operation elasticity is big.The dilute sulfuric acid concentration systems can be applied in hot stove gas purification process technique, and dilute sulfuric acid is concentrated using the waste heat of hot stove gas, realize energy conservation and environmentally friendly double benefit.
Description
Technical field
The utility model relates to a kind of corrosion-resistant falling film evaporator and dilute sulfuric acid concentration systems.
Background technique
In the industrial productions such as chemical industry, metallurgy, thermoelectricity, hot stove gas usually contains a certain amount of SO2、SO3Sour gas with
And moisture, after the high-temperature position heat of hot stove gas is by the recycling of the equipment such as boiler, economizer, hot stove gas passes through following flow processing again:
Wet purification → demisting → drying → SO2It is converted into SO3→ concentrated sulfuric acid, tail gas qualified discharge is made after absorption system absorbs again.
To avoid dew point corrosion, the furnace gas temperature general control of economizer or dry collector is gone out in above-mentioned process at 250 DEG C~300 DEG C
Left and right enters back into wet purification processing, and wherein the hot stove gas heat of this part is walked by wet purification liquid band, causes to waste.Such as
The above-mentioned temperature control of fruit is lower than 250 DEG C, then severe corrosion to equipment, is also easy to produce leakage accident.At the same time, in the above process
Wet purification process but generates a certain amount of dilute sulfuric acid simultaneously, the dilute sulfuric acid concentration of wet purification workshop section generally 5~20%, this
A little dilute sulfuric acids are since concentration is too low, and reuse channel is limited, and qualified discharge after considerable part alkali neutralization economically causes wave
Take, certain pressure is also brought to water environment.It is decompression falling film concentration method that common method, which is concentrated, in dilute sulfuric acid.What this method used
Heat source is generally low-pressure steam, and heat exchange efficiency is limited；And this method energy consumption is high, and equipment cost is high.
Utility model content
The technical problems to be solved in the utility model is to overcome existing dilute sulfuric acid concentrator energy consumption high, at high cost
Defect, and provide a kind of corrosion-resistant falling film evaporator and dilute sulfuric acid concentration systems.The dilute sulfuric acid concentration systems can be according to need
It asks the sulphuric acid concentration of 95% any concentration below to required concentration, equipment operation elasticity is big, and energy conservation and environmental protection.
The utility model is to solve above-mentioned technical problem by following technical proposals:
The utility model provides a kind of corrosion-resistant falling film evaporator comprising:
Top cover, the top cover are equipped with top chamber, dilute sulfuric acid import and the first acid moisture outlet, the dilute sulfuric acid import and are located at
The lower sidewalls of the top cover, the described first acid moisture outlet are located at the top of the top cover；
Liquid collecting room, the liquid collecting room are equipped with liquid collecting cavity, finished acid outlet and the second acid moisture outlet, the finished acid and go out
Mouth is located at the bottom of the liquid collecting room, and the described second acid moisture outlet is located at the top side wall of the liquid collecting room；
Shell, the shell are connected between the top cover and the liquid collecting room, and the shell is close to the liquid collecting room
Side wall is equipped with recuperated gas import, and the shell is exported close to the side wall of the top cover equipped with recuperated gas, the shell
Equipped with accommodating cavity, upper perforated plate, lower perforated plate and evaporation tube are equipped in the accommodating cavity；The upper perforated plate separates the accommodating cavity and institute
State top chamber, the lower perforated plate separates the accommodating cavity and the liquid collecting cavity, the evaporation tube be successively arranged in the upper perforated plate and
The lower perforated plate, the both ends of the evaporation tube are connected to the top chamber and the liquid collecting cavity respectively.
Preferably, the evaporation tube is uniformly distributed in the accommodating cavity.The evaporation tube is preferably high temperature resistant quartz
Pipe or borosilicate glass tube.
Preferably, sandwiched first seal between the outer peripheral edge of the evaporation tube and the upper perforated plate, plays sealing, positioning
The effect of the evaporation tube and cloth acid；Sandwiched second seal between the outer peripheral edge of the evaporation tube and the lower perforated plate, to institute
It states evaporation tube and plays sealing, positioning, support.The material of the first seal and second seal is preferably polytetrafluoro
Ethylene.
Wherein, it preferably, the first seal is higher by the upper top surface of the upper perforated plate, is opened on the side wall of the raised area
If several apertures, the axis and horizontal direction parallel of the aperture, the bottom surface of the aperture and the upper top surface of the upper perforated plate are flat
Together, so that the dilute sulfuric acid on the upper top surface of the upper perforated plate passes through the aperture even into the evaporation tube.More preferably, in water
Square upwards, the radial angle of the axis of the aperture and the first seal is 10~60 °, preferably 30 °, is owned
It is consistent that aperture deflects direction, so that dilute sulfuric acid enters the evaporation tube in vortex, is conducive to improve heat exchange efficiency.
Preferably, the lower perforated plate, which is equipped with, condenses sour drain line.The sour drain line of the condensation is used for will be in the shell
Micro long-pending acid be expelled to the liquid collecting room.
Preferably, the top cover and/or the liquid collecting room are equipped with manhole, it is easily installed and overhauls.
Preferably, the outer surface of the inner surface of the top cover and the upper perforated plate and lower perforated plate is equipped with polytetrafluoroethylene (PTFE)
Layer.Preferably, the inner surface of the liquid collecting room and the shell be equipped with polytetrafluoroethylene ethylene layer and/or acidproof brick layer, more preferably for
It is successively arranged polytetrafluoroethylene ethylene layer and acidproof brick layer from outside to inside.
The utility model provides a kind of dilute sulfuric acid concentration systems comprising dilute sulfuric acid storage tank, aforementioned corrosion-resistant falling film evaporation
Device, acid water vapor condenser, acid water accumulator tank and finished product acid storage tank, wherein the dilute sulfuric acid storage tank and the dilute sulfuric acid into
Mouth connection, the import of the described first acid moisture outlet and the second acid moisture outlet with the acid water vapor condenser
The outlet of connection, the acidity water vapor condenser is connected to the acid water accumulator tank；The finished acid outlet and the finished product
Acid storage tank connection.
In the utility model, the dilute sulfuric acid storage tank can be this field routine corrosion resistant liquid storage tank.Preferably, described dilute
Sulfuric acid storage tank passes through dilute sulfuric acid pump and the dilute sulfuric acid inlet communication.The dilute sulfuric acid pump is commonly used in the art corrosion-resistant
Liquid delivery pump, for dilute sulfuric acid to be delivered in the corrosion-resistant falling film evaporator from the dilute sulfuric acid storage tank.The diluted acid
Pump is preferably connected with flowmeter and regulating valve, and for controlling the flow of dilute sulfuric acid, the flowmeter and regulating valve are that this field is normal
Rule.
In the utility model, preferably, finished acid outlet is connected with the dense meter of acid, and pass through the first valve and dilute sulphur
Acid storage tank connection, is connect by the second valve with the finished product acid storage tank.The dense meter of acid is for monitoring from finished acid outlet stream
The concentration of sulfuric acid out, when concentration is lower than setting value, first valve opening, second valve is closed；When concentration reaches
When to setting value, first valve is closed, second valve opening.
In the utility model, the acidity water vapor condenser can be this field conventional condenser, for condensing from described resistance to
The acid steam that corrosion falling film evaporator evaporates.
In the utility model, the acid water accumulator tank can be this field routine corrosion resistant liquid storage tank, for recycle from
The acid water that the acidity water vapor condenser condenses.
In the utility model, the finished product acid storage tank is this field routine corrosion resistant liquid storage tank, for storing from described
The sulfuric acid being concentrated to get in corrosion-resistant falling film evaporator.
In the utility model, the course of work of the dilute sulfuric acid concentration systems is as follows: recuperated gas is from the recuperated gas
Import enters the shell, and dilute sulfuric acid enters the top chamber from the dilute sulfuric acid import, and then enters the evaporation tube；The height
Dilute sulfuric acid is concentrated so that the moisture in dilute sulfuric acid evaporates in wet body and the dilute sulfuric acid heat exchange；The sulfuric acid being concentrated to get is from institute
It states finished acid outlet and enters the finished product acid storage tank；The steam evaporated passes through the described first acid moisture outlet and described second
Acid moisture outlet discharge, into the acid water vapor condenser, the acid water obtained after condensation is recycled into the acid water
Slot；Recuperated gas after heat exchange is exported from the recuperated gas to be discharged.
Preferably, after dilute sulfuric acid enters top chamber from the dilute sulfuric acid import, dilute sulfuric acid on the upper top surface of the upper perforated plate
It is uniformly distributed by the first seal, by the aperture even into the evaporation tube.
Preferably, the sulfuric acid being concentrated to get is exported after flowing out from the finished acid through the dense meter of acid, when the concentration of sulfuric acid
When lower than setting value, first valve opening, second valve is closed, and sulfuric acid turns again to the dilute sulfuric acid storage tank, into
Enter next concentration cycles；When the concentration of sulfuric acid reaches setting value, first valve is closed, second valve opening,
Sulfuric acid enters the finished product acid storage tank.
Preferably, the inlet temperature of the dilute sulfuric acid is 20~60 DEG C, outlet temperature is 100~300 DEG C.The dilute sulfuric acid
Concentration can be 95% hereinafter, preferably 90% hereinafter, be more preferably 88% hereinafter, be most preferably 79% hereinafter, such as 5~
20%, then such as 6%.
Preferably, the inlet temperature of the recuperated gas is 250~300 DEG C, outlet temperature is 100~150 DEG C.It is described to change
Hot gas is preferably hot stove gas.The hot stove gas can be strong corrosive hot stove gas.
In the utility model, the course of work of the dilute sulfuric acid concentration systems in hot stove gas purification process technique can are as follows:
The upstream of the dilute sulfuric acid concentration systems is master device electric precipitator, and downstream is master device purification and washing tower, is removed from master device electricity
The hot stove gas of dirt device discharge enters the shell through recuperated gas import, the hot stove from the shell through recuperated gas outlet discharge
Gas enters in master device purification and washing tower；The dilute sulfuric acid that master device purification and washing tower generates can enter the dilute sulfuric acid storage tank；Institute
State the acid water in acid water accumulator tank can be used as supplement water be recycled to master device purification and washing tower.
The positive effect of the utility model is: the resistance to various concentration of the corrosion-resistant falling film evaporator of the utility model
Sulfuric acid corrosion can be used for that dilute sulfuric acid is concentrated.Dilute sulfuric acid concentration systems including corrosion-resistant falling film evaporator can according to demand by
The dilute sulfuric acid of 95% any concentration below is concentrated into required concentration, and equipment operation elasticity is big.The dilute sulfuric acid concentration systems can answer
For dilute sulfuric acid to be concentrated using the waste heat of hot stove gas in hot stove gas purification process technique, waste economically is avoided, is realized
Environmental emission reduction.
Detailed description of the invention
Fig. 1 is the dilute sulfuric acid concentration systems and process flow chart of the embodiments of the present invention 1.
Fig. 2 is the structural schematic diagram of corrosion-resistant falling film evaporator in the embodiments of the present invention 1.
Fig. 3 is the enlarged drawing in Fig. 2 at M.
Fig. 4 is the sectional view in the face P in Fig. 3.
Fig. 5 is the enlarged drawing in Fig. 2 at N.
Fig. 6 is the cross sectional plan view in the face Q in Fig. 2.
Description of symbols:
I: dilute sulfuric acid storage tank；
II: dilute sulfuric acid pump；
III: corrosion-resistant falling film evaporator
Top cover 1 pushes up chamber 11, dilute sulfuric acid import 12, the first acid moisture outlet 13, manhole 10；
Liquid collecting room 2, liquid collecting cavity 21, finished acid outlet 22, the second acid moisture outlet 23, manhole 10；
Shell 3, accommodating cavity 31, recuperated gas import 32, recuperated gas outlet 33；
Upper perforated plate 4；
Lower perforated plate 5；
Evaporation tube 6；
First seal 7；
Second seal 8；
Condense sour drain line 9；
IV: acid water vapor condenser；
V: acid water accumulator tank；
VI: finished product acid storage tank；
A: flowmeter；
B: regulating valve；
C: the dense meter of acid；
D: the first valve；
E: the second valve.
Specific embodiment
A preferred embodiment is named, and completely illustrates the utility model in conjunction with attached drawing to become apparent from.
Embodiment 1
Dilute sulfuric acid concentration systems as shown in Figure 1, including dilute sulfuric acid storage tank I, dilute sulfuric acid pump II, corrosion-resistant falling film evaporator
III, acid water vapor condenser IV, acid water accumulator tank V and finished product acid storage tank VI.Wherein, dilute sulfuric acid pump II be connected with flowmeter A and
The structure of regulating valve B, corrosion-resistant falling film evaporation III as shown in Fig. 2, comprising:
Top cover 1, top cover 1 are equipped with top chamber 11, the acid moisture outlet 13 of dilute sulfuric acid import 12, first and manhole 10, top cover 1
Inner surface is equipped with polytetrafluoroethylene ethylene layer；
Liquid collecting room 2, liquid collecting room 2 are equipped with liquid collecting cavity 21, the acid moisture outlet 23 in finished acid outlet 22, second and manhole 10,
The inner surface of liquid collecting room 2 is successively arranged polytetrafluoroethylene ethylene layer and acidproof brick layer；
Shell 3, shell 3 are connected between top cover 1 and liquid collecting room 2, and shell 3 is equipped with accommodating cavity 31, and shell 3 is close to liquid collecting room
2 side wall is equipped with recuperated gas import 32, and shell 3 is equipped with recuperated gas outlet 33 close to the side wall of top cover 1, shell 3
Inner surface is successively arranged polytetrafluoroethylene ethylene layer and acidproof brick layer；Upper perforated plate 4, lower perforated plate 5 and evaporation tube 6 are equipped in accommodating cavity 31,
Upper perforated plate 4 separates accommodating cavity 31 and top chamber 11, and lower perforated plate 5 separates accommodating cavity 31 and liquid collecting cavity 21, and lower perforated plate 5 is equipped with condensation acid and dredges
Pipe 9 is let out, evaporation tube 6 is successively arranged in upper perforated plate 4 and lower perforated plate 5, and the both ends of evaporation tube 6 connect respectively at liquid collecting cavity 21 and top chamber 11
It is logical；First seal 7 is equipped between the outer peripheral edge and upper perforated plate 4 of evaporation tube 6, first seal 7 is higher by the upper top of upper perforated plate 4
Face, opens up 4 apertures on the side wall of the raised area, the bottom surface of aperture and the upper either flush of upper perforated plate 4, the axis of aperture with
Horizontal direction parallel, and in the horizontal direction, the axis of aperture and the radial angle of first seal 7 are 30 °, all apertures
Deflection (as shown in Figures 3 and 4) counterclockwise；Sandwiched second seal 8 is (such as Fig. 5 institute between the outer peripheral edge and lower perforated plate 5 of evaporation tube 6
Show)；The outer surface of upper perforated plate 4 and lower perforated plate 5 is equipped with polytetrafluoroethylene ethylene layer, and evaporation tube 6 is high temperature resistant quartz ampoule, first seal
7 and second seal 8 material be polytetrafluoroethylene (PTFE)；Evaporation tube 6 is uniformly distributed (as shown in Figure 6) in accommodating cavity 31.
The acid moisture outlet 13 of the first of corrosion-resistant falling film evaporator III and the second acid moisture outlet 23 are and acid water
The outlet of the inlet communication of vapour condenser IV, acid water vapor condenser IV is connected to acid water accumulator tank V；Corrosion-resistant falling film evaporation
The finished acid outlet 22 of device III is connected with the dense meter C of acid, and is connect by the first valve D with dilute sulfuric acid storage tank I, passes through the second valve E
It is connected to finished product acid storage tank VI.
The dilute sulfuric acid concentration systems are used in the purification process technique of the hot stove gas of pyrite-based sulfuric acid production generation, the dilute sulfuric acid
The upstream of concentration systems connects master device electric precipitator, downstream connection master device purification and washing tower.It is arranged from master device electric precipitator
20~60 DEG C of concentration that master device purification and washing tower generates are concentrated as recuperated gas as 6% dilute sulfuric acid in hot stove gas out.It should
The major process unit specification and technical parameter of dilute sulfuric acid concentration systems such as table 1, the technical characteristic of corrosion-resistant falling film evaporator is such as
Table 2, main raw material(s) and power consumption norm such as table 3, products scheme such as table 4.
1 major process unit specification of table and technical parameter
2 falling film evaporator list of technical characteristics of table
3 main raw material(s) of table and power consumption norm
4 products scheme of table
| Title | Specification | Unit | Hourly output | Annual output | Remarks |
| Sulfuric acid | 56% | t | 2.5 | 2×104 | — |
The operating procedure of the dilute sulfuric acid concentration systems is as follows:
1, before the driving of pyrite-based sulfuric acid production master device, check that confirmation all devices are normal, it is ensured that reach driving condition.
2, the flow rate set value of flowmeter A is set to 5t/h；Set acid it is dense meter C concentration definite value be 56%, set concentration it is low
First valve D is opened when 56%, the second valve E is closed, and first valve D is closed when concentration reaches 56%, the second valve E is opened
It opens.
3, by operating instruction start thin acid pump II, slowly adjust regulating valve B, control its flow to 5t/h enter corrosion-resistant drop
Film evaporator III establishes dilute sulfuric acid circulation.
4, open pyrite-based sulfuric acid production master device, the hot stove gas being discharged by master device electric precipitator from recuperated gas import 32 into
Enter shell 3, dilute sulfuric acid enters top chamber 11 from dilute sulfuric acid import 12, and the dilute sulfuric acid on the upper top surface of upper perforated plate 4 is by first seal 7
It is uniformly distributed, evaporation tube 6 is entered in vortex by aperture；
Dilute sulfuric acid is concentrated so that the moisture in dilute sulfuric acid evaporates in hot stove gas and dilute sulfuric acid heat exchange；
The sulfuric acid being concentrated to get flows through the dense meter C of acid from 22 outflow of finished acid outlet, when concentration is lower than 56%, the first valve
Door D is opened, and the second valve E is closed, and sulfuric acid turns again to dilute sulfuric acid storage tank I, into next concentration cycles；When concentration reaches
When 56%, the first valve D is closed, and the second valve E is opened, and sulfuric acid enters finished product acid storage tank VI；
Micro product acid in shell 3 will be expelled to the liquid collecting room by condensing sour drain line 9；
The steam evaporated is discharged by the first acid moisture outlet 13 and the second acid moisture outlet 23, into acid water
Vapour condenser IV condensation, the acid water obtained after condensation enter acid water accumulator tank V；
Hot stove gas after heat exchange is discharged into master device purification and washing tower from hot furnace gas export 33.
5, it after the acid water to certain liquid level in acid water accumulator tank V, send to master device purification and washing tower as supplement
Water.
Claims (10)
1. a kind of corrosion-resistant falling film evaporator, which is characterized in that the corrosion-resistant falling film evaporator includes:
Top cover, the top cover are equipped with top chamber, dilute sulfuric acid import and the first acid moisture outlet, and the dilute sulfuric acid import is located at described
The lower sidewalls of top cover, the described first acid moisture outlet are located at the top of the top cover；
Liquid collecting room, the liquid collecting room are equipped with liquid collecting cavity, finished acid outlet and the second acid moisture outlet, the finished acid and export position
In the bottom of the liquid collecting room, the described second acid moisture outlet is located at the top side wall of the liquid collecting room；
Shell, the shell are connected between the top cover and the liquid collecting room, side wall of the shell close to the liquid collecting room
It is equipped with recuperated gas import, the shell is exported close to the side wall of the top cover equipped with recuperated gas, and the shell is equipped with
Accommodating cavity, the accommodating cavity is interior to be equipped with upper perforated plate, lower perforated plate and evaporation tube；The upper perforated plate separates the accommodating cavity and the top
Chamber, the lower perforated plate separate the accommodating cavity and the liquid collecting cavity, and the evaporation tube is successively arranged in the upper perforated plate and described
Lower perforated plate, the both ends of the evaporation tube are connected to the top chamber and the liquid collecting cavity respectively.
2. corrosion-resistant falling film evaporator as described in claim 1, which is characterized in that the evaporation tube is equal in the accommodating cavity
Even distribution.
3. corrosion-resistant falling film evaporator as described in claim 1, which is characterized in that the outer peripheral edge of the evaporation tube and it is described on
Sandwiched first seal between tube sheet, sandwiched second seal between the outer peripheral edge of the evaporation tube and the lower perforated plate.
4. corrosion-resistant falling film evaporator as claimed in claim 3, which is characterized in that the first seal is higher by the upper tube
The upper top surface of plate opens up several apertures on the side wall of the raised area, and the axis and horizontal direction parallel of the aperture are described small
The upper either flush of the bottom surface in hole and the upper perforated plate；In the horizontal direction, the axis of the aperture and the first seal
Radial angle be 10~60 °.
5. corrosion-resistant falling film evaporator as claimed in claim 4, which is characterized in that the angle is 30 °.
6. corrosion-resistant falling film evaporator as described in claim 1, which is characterized in that the lower perforated plate, which is equipped with, condenses sour catharsis
Pipe；The top cover and/or the liquid collecting room are equipped with manhole.
7. corrosion-resistant falling film evaporator as described in claim 1, which is characterized in that the inner surface of the top cover and it is described on
The outer surface of tube sheet and lower perforated plate is equipped with polytetrafluoroethylene ethylene layer；The inner surface of the liquid collecting room and the shell is equipped with polytetrafluoroethyl-ne
Alkene layer and/or acidproof brick layer.
8. a kind of dilute sulfuric acid concentration systems, which is characterized in that the dilute sulfuric acid concentration systems include dilute sulfuric acid storage tank, claim
1~7 described in any item corrosion-resistant falling film evaporators, acid water vapor condenser, acid water accumulator tank and finished product acid storage tank,
In, the dilute sulfuric acid storage tank and the dilute sulfuric acid inlet communication, the described first acid moisture outlet and the second acid steam
Inlet communication of the outlet with the acid water vapor condenser, the outlet of the acidity water vapor condenser and the acid water recycle
Slot connection；The finished acid outlet is connected to the finished product acid storage tank.
9. dilute sulfuric acid concentration systems as claimed in claim 8, which is characterized in that the dilute sulfuric acid storage tank by dilute sulfuric acid pump with
The dilute sulfuric acid inlet communication；The dilute sulfuric acid pump is connected with flowmeter and regulating valve.
10. dilute sulfuric acid concentration systems as claimed in claim 8, which is characterized in that the finished product of the corrosion-resistant falling film evaporator
Acid outlet is connected with the dense meter of acid, and is connect by the first valve with the dilute sulfuric acid storage tank, passes through the second valve and the finished acid
Storage tank connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920145893.7U CN209612230U (en) | 2019-01-28 | 2019-01-28 | Corrosion-resistant falling film evaporator and dilute sulfuric acid concentration systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920145893.7U CN209612230U (en) | 2019-01-28 | 2019-01-28 | Corrosion-resistant falling film evaporator and dilute sulfuric acid concentration systems |
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| CN209612230U true CN209612230U (en) | 2019-11-12 |
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ID=68452131
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109692490A (en) * | 2019-01-28 | 2019-04-30 | 何文旭 | Corrosion-resistant falling film evaporator, dilute sulfuric acid concentration systems and its technique and application |
| CN111017931A (en) * | 2019-12-31 | 2020-04-17 | 贵州瓮福蓝天氟化工股份有限公司 | Method for concentrating fluosilicic acid by high-temperature dilute sulfuric acid |
-
2019
- 2019-01-28 CN CN201920145893.7U patent/CN209612230U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109692490A (en) * | 2019-01-28 | 2019-04-30 | 何文旭 | Corrosion-resistant falling film evaporator, dilute sulfuric acid concentration systems and its technique and application |
| CN111017931A (en) * | 2019-12-31 | 2020-04-17 | 贵州瓮福蓝天氟化工股份有限公司 | Method for concentrating fluosilicic acid by high-temperature dilute sulfuric acid |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211119 Address after: 516000 plot H2, Dayawan Petrochemical District, Huizhou City, Guangdong Province Patentee after: HUIZHOU BESTGRAND SHENG'AN CHEMICAL Co.,Ltd. Address before: 516086 bailihong chemical, Binhai 7th Road, Dayawan Petrochemical District, Huizhou City, Guangdong Province Patentee before: He Wenxu |
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| TR01 | Transfer of patent right |