CN109289444A - A kind of anhydrous hydrofluoric acid production line converter exhausting method - Google Patents
A kind of anhydrous hydrofluoric acid production line converter exhausting method Download PDFInfo
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- CN109289444A CN109289444A CN201810823214.7A CN201810823214A CN109289444A CN 109289444 A CN109289444 A CN 109289444A CN 201810823214 A CN201810823214 A CN 201810823214A CN 109289444 A CN109289444 A CN 109289444A
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- connecting tube
- air inlet
- hydrogen fluoride
- tube
- inlet buffer
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- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 title claims abstract description 102
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000007789 gas Substances 0.000 claims abstract description 67
- 229910000040 hydrogen fluoride Inorganic materials 0.000 claims abstract description 62
- 238000005201 scrubbing Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000006185 dispersion Substances 0.000 claims abstract description 4
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 238000005260 corrosion Methods 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 230000007797 corrosion Effects 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 13
- 230000008676 import Effects 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 12
- 210000004894 snout Anatomy 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 10
- 230000002401 inhibitory effect Effects 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 claims description 8
- 238000010079 rubber tapping Methods 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 4
- 239000010428 baryte Substances 0.000 claims description 4
- 229910052601 baryte Inorganic materials 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 229920001568 phenolic resin Polymers 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 2
- 239000011737 fluorine Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 11
- 238000006073 displacement reaction Methods 0.000 abstract description 5
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract 1
- 239000002253 acid Substances 0.000 description 8
- 150000002431 hydrogen Chemical class 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000003682 fluorination reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 206010035664 Pneumonia Diseases 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- XRWSZZJLZRKHHD-WVWIJVSJSA-N asunaprevir Chemical compound O=C([C@@H]1C[C@H](CN1C(=O)[C@@H](NC(=O)OC(C)(C)C)C(C)(C)C)OC1=NC=C(C2=CC=C(Cl)C=C21)OC)N[C@]1(C(=O)NS(=O)(=O)C2CC2)C[C@H]1C=C XRWSZZJLZRKHHD-WVWIJVSJSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 206010006451 bronchitis Diseases 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229940125961 compound 24 Drugs 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 208000021760 high fever Diseases 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 210000001533 respiratory mucosa Anatomy 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/19—Fluorine; Hydrogen fluoride
- C01B7/191—Hydrogen fluoride
- C01B7/192—Preparation from fluorspar
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2047—Hydrofluoric acid
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/30—Capture or disposal of greenhouse gases of perfluorocarbons [PFC], hydrofluorocarbons [HFC] or sulfur hexafluoride [SF6]
Abstract
The invention discloses a kind of anhydrous hydrofluoric acid production line converter exhausting method, it the steps include: that (1) air inlet buffer assembles；(2) piping connection: reducing multi-pass adapter tube is connected on air inlet buffer, and connecting tube connects reducing multi-pass adapter tube；(3) water pipe is connected at connecting tube connection scrubbing tower, solenoid valve is installed on water pipe, and power control box in corresponding is set；(5) outlet: preparation react start 5-10min after, open air inlet buffer, hydrogen fluoride gas dispersion inflow connecting tube in, then by connecting tube be sent into scrubbing tower (6) pipeline washing；One aspect of the present invention reduces the unit time gas output of hydrogen fluoride gas by setting air inlet buffer, so that the displacement of unit time is lower in connecting tube, to reduce hydrogen fluoride gas for the corrosiveness of tube wall；On the other hand, it is reduced using the conveying capacity for mostly shunting every connecting tube of delivery of fluorinated hydrogen with connecting tube, further buffered etch effect improves the safety of production.
Description
Technical field
The invention belongs to Acid of Hydrofluoric Acid Production lines, relate to a kind of anhydrous hydrofluoric acid production line converter exhausting method.
Background technique
Hydrogen fluoride is colourless liquid or gas, and molecular weight 20.01 is soluble easily in water.Its boiling point is 19.5 DEG C, non-combustible.
Belong to height and endanger medium, maximum permissible concentration is 1mg/m in air3.Its toxic hazard is that have by force to respiratory mucosa and skin
Strong stimulation, the hydrogen fluoride for sucking high concentration can cause bronchitis and pneumonia, or even generate radiation sex hanges.Hydrogen fluoride
There is strong corrosive to metal, glass and siliceous object, if meeting high fever, container internal pressure is increased rapidly, and has the danger of cracking and explosion
Danger.
Anhydrous hydrogen fluoride production technology, be 98% using Fluorspar Powder, mass fraction the concentrated sulfuric acid and oleum as raw material,
Heating generates thick hydrogen fluoride gas in rotary reaction furnace, and the operations such as washed, condensation, rectifying, degassing obtain anhydrous hydrogen fluoride
Product, byproduct are fluosilicic acid and gypsum.
It finds in actual production, due to the strong corrosive and high toxicity of hydrogen fluoride gas and the high temperature of converter, these
Characteristic proposes very high design requirement to selection, the system of laying etc. of conveyance conduit.If design is improper to be will lead to leakage, blocks up
Situations such as plug, occurs, and not only influences the stable operation of production, and the safety accidents such as casualties easily occur.
Summary of the invention
The purpose of the present invention is to provide a kind of anhydrous hydrofluoric acid production line converter exhausting methods, in Acid of Hydrofluoric Acid Production
There are the problem of, the outlet mode of hydrogen fluoride gas is rectified and improved, on the one hand by setting air inlet buffer come reduce fluorination
The unit time gas output of hydrogen, so that the displacement of unit time is lower in connecting tube, to reduce hydrogen fluoride gas pair
In the corrosiveness of tube wall；On the other hand, using the conveying capacity for mostly shunting every connecting tube of delivery of fluorinated hydrogen with connecting tube
It reduces, further buffered etch effect to extend the service life of pipeline, improves the safety of production, safety is effectively reduced
The probability that accident occurs.
In order to solve above-mentioned technical proposal, adopt the following technical scheme that
A kind of anhydrous hydrofluoric acid production line converter exhausting method, it is characterised in that include the following steps:
(1) air inlet buffer assembles；
(2) piping connection: first in reducing multi-pass adapter tube, the external coating corrosion-inhibiting coating of connecting tube, then pass through blind flange
Reducing multi-pass adapter tube is connected on air inlet buffer, the external tapping quantity of reducing multi-pass adapter tube is more than or equal to 2, and reducing is more
3 gauge ports are arranged in the upper surface for connecting pipe；Connecting tube is connected on external tapping, the other end of connecting tube connects scrubbing tower；Even
Adapter tube after the installation is completed, carries small-sized cooler in connecting tube；Pressure detecting is packed into after piping connection on gauge port
Instrument, temperature instrument and hydrogen fluoride gas detect instrument；
(3) water pipe is connected at connecting tube connection scrubbing tower, solenoid valve is installed on water pipe, and control electricity in corresponding is set
Case, solenoid valve, air inlet buffer and small-sized cooler are wired on the interface of middle power control box, straight by middle power control box
Control is connect, pressure instrumentation, temperature instrument and hydrogen fluoride gas detection instrument are transferred in middle power control box；
(4) pipe interface position air-leakage test；
(5) outlet: after beginning 5-10min is reacted in preparation, air inlet buffer is opened, the inflow of hydrogen fluoride gas dispersion connects
In adapter tube, then scrubbing tower is sent by connecting tube；It is 75-80 DEG C that maximum temperature is preset in middle power control box, minimum temperature 65-70
DEG C, the maximum concentration of hydrogen fluoride gas is 0.98-1.05g/mL, and the minimum concentration of hydrogen fluoride gas is 0.75-0.82g/mL；Inspection
When testing temperature is higher than maximum temperature, small-sized cooler is started to work, and work to temperature minimizes temperature or less；Detectable concentration is high
In maximum concentration, air inlet buffer operating rate is reduced, when detectable concentration is lower than minimum concentration, accelerates air inlet buffer operation speed
Rate；
(6) pipeline washs: when the detectable concentration of hydrogen fluoride gas is lower than 0.081-0.121g/mL, show that reaction is completed, this
When in power control box automatically turn on solenoid valve, connecting tube and reducing multi-pass are washed using current scour method and taken over, 2-5min is washed.
After it is preferred that, it is assembled into pneumatic buffer, air inlet buffer is made of import, outlet, gas flow and buffer, buffering
Device then includes motor, transmission mechanism, active gear shaft and steel pole, and the output end of motor is connected on the input terminal of transmission mechanism,
The output end of transmission mechanism is connected on active gear shaft, then active gear shaft is mounted in the driven gear of steel pole with engagement system
On, snout plug is welded in the upper end welding spout plug of steel pole, the lower end of steel pole；Trial operation is carried out after being completed, trial operation is errorless
Afterwards, it is assembled into gas outlet by blind flange.Air inlet buffer for reducing the unit time gas output, thus the company of reduction
The gas pushing quantity of unit time in adapter tube, its working principle is that: after motor work, active gear shaft rotation is driven, engagement is passed through
Convert rotary motion to the up and down motion of steel pole, during moving up, spout plug blocks outlet, and snout plug opens import, fluorine
Change hydrogen to run in air inlet buffer；On move on to top after, steel pole moves down, in folding process, snout plug block import, outlet
Plug opens outlet, and hydrogen fluoride gas is sent out by air inlet buffer；Such loopy moving reduces the unit time gas transmission of connecting tube
Amount, reduces the corrosiveness of hydrogen fluoride gas.
After it is preferred that, before being assembled into pneumatic buffer, each components are taken, in each component surface brushing corrosion-inhibiting coating.It should
Corrosion-inhibiting coating is form compact and stable, resistance to strong acid, and especially hydrogen fluoride resistant corrosive effect is good.
After it is preferred that, transmission mechanism is made of area's shoulder, connecting plate and reciprocating gear, when assembling, by one end of area's shoulder and motor
Connection, the other end connects connecting plate, then connecting plate is connected on reciprocating gear and connects active gear shaft by reciprocating gear.In the biography
Under the transmission effect of motivation structure, motor operation is smooth.
After it is preferred that, corrosion-inhibiting coating selects one of phenol-formaldehyde resin modified, barite, nanometer chromium powder.These preserving timbers
Expect that form compact and stable, resistance to strong acid, especially hydrogen fluoride resistant corrosive effect are good.
After it is preferred that, connecting tube is formed by short tube, corrugated expansion joint and with adapter tube short tube, during corrugated expansion joint is connected to
Between position, small-sized cooler is carried on the surface of corrugated expansion joint.Corrugated expansion joint provides thermal compensation for connecting tube, and compensation connects
It takes over by thermal expansion length caused by being heated, to weaken or eliminate because of the stress caused by power that expands with heat and contract with cold, keeps connecting tube
Planform stablize.
It include signal conversion circuit, signal recognition circuit and logic control circuit in middle power control box after it is preferred that, signal turns
The input terminal for changing circuit is connect with pressure instrumentation, temperature instrument and hydrogen fluoride gas detection instrument, signal conversion electricity
The output end of the output end connection signal identification circuit on road, signal recognition circuit connects logic control circuit, logic control circuit
Control solenoid valve, air inlet buffer and small-sized cooler.Signal conversion circuit can be by pressure instrumentation, temperature instrument
And the signal that hydrogen fluoride gas detection instrument detects is converted into electric signal, then the electric signal is transferred to signal recognition circuit,
Signal recognition circuit identifies and determines the electric signal, issues corresponding control instruction by signal of the logic control circuit to identification.
Thus automatic control function of the power control box for solenoid valve, air inlet buffer and small-sized cooler in realizing.
After it is preferred that, the specific steps of air-leakage test in the step (4) are as follows: nitrogen is filled with into converter, nitrogen is by turning
Furnace detects the air-tightness of locations of structures everywhere, one of work can be carried out down after air-leakage test is errorless to each tube runs
Sequence.It can guarantee that hydrogen fluoride gas does not leak by air-leakage test, improve the safety of production, reduce what safety accident occurred
Probability.
After it is preferred that, after the completion of step (6) washing, the solution in converter is taken out, obtains hydrogen fluoride after purified, filtering
Solution.Hydrogen fluoride solution recoverable meets the production theory of scientific environmental protection, has certain economic benefit.
As a result of the above technical solution, the following beneficial effects are obtained:
The present invention is a kind of anhydrous hydrofluoric acid production line converter exhausting method, the problem of for Acid of Hydrofluoric Acid Production,
The outlet mode of hydrogen fluoride gas is rectified and improved, the unit of hydrogen fluoride gas is on the one hand reduced by setting air inlet buffer
Time gas output, so that the displacement of unit time is lower in connecting tube, to reduce corrosion of the hydrogen fluoride gas for tube wall
Effect；On the other hand, it is reduced using the conveying capacity for mostly shunting every connecting tube of delivery of fluorinated hydrogen with connecting tube, is further delayed
Corrosiveness is rushed, to extend the service life of pipeline, improves the safety of production, the general of safety accident generation is effectively reduced
Rate.Its specific beneficial effect shows as the following；
1, air inlet buffer for reducing the unit time gas output, to reduce supplying gas for unit time in connecting tube
Amount, its working principle is that: after motor work, active gear shaft rotation is driven, steel pole is converted for rotary motion by engagement
Up and down motion, during moving up, spout plug block outlet, snout plug open import, hydrogen fluoride gas run into air inlet buffer
In device；On move on to top after, steel pole moves down, in folding process, snout plug block import, spout plug open outlet, be fluorinated hydrogen
Body is sent out by air inlet buffer；Such loopy moving reduces the unit time displacement of connecting tube, reduces the corruption of hydrogen fluoride gas
Erosion effect.
2, the present invention cooperates delivery of fluorinated hydrogen using reducing multi-pass adapter tube and connecting tube, and reducing multi-pass adapter tube includes
2 or more external tappings, each external tapping are all connected with a connecting tube, and every connecting tube is connected to scrubbing tower；More companies
Hydrogen fluoride gas is delivered in scrubbing tower by adapter tube in the form of shunting, and is compared more existing outlet system, is flowed in every connecting tube
The hydrogen fluoride gas of warp significantly reduces, and the corrosiveness of connecting tube is substantially reduced.
3, it is provided with water pipe in the present invention, which is opened and closed by solenoid valve control, takes over interior fluorination hydrogen with reducing multi-pass
The concentration of body is the criterion whether reaction terminates, and is confirming opens solenoid valve after reaction, is rinsing connecting tube and reducing
Multi-pass nozzle inner wall takes remaining hydrogen fluoride gas into converter out of.Avoid corrosion of these raffinates to pipeline.Structure letter
It is single, it is ingenious in design, it is easy to operate.
Detailed description of the invention
The present invention will be further explained below with reference to the attached drawings:
Fig. 1 is the complete machine schematic diagram of converter outlet system；
Fig. 2 is the schematic diagram that the import of air inlet buffer is opened；
Fig. 3 is the schematic diagram that the outlet of air inlet buffer is opened；
Fig. 4 is the functional block diagram of middle power control box.
Specific embodiment
As shown in Figures 1 to 4, a kind of anhydrous hydrofluoric acid production line converter exhausting method, includes the following steps:
(1) air inlet buffer 3 assembles:
A, before being assembled into pneumatic buffer 3, each components of air inlet buffer 3, including casing 28, motor are taken first
27, active gear shaft 23, steel pole 21, area's shoulder 26, connecting plate 25, reciprocating gear 24, snout plug 20 and spout plug 17；Casing 28 it is upper
End is equipped with outlet 16, and the lower end of casing 28 is equipped with import 19, is formed with gas flow 18 in casing 28；In each component surface and
The inner surface brushing corrosion-inhibiting coating of casing 28, the corrosion-inhibiting coating select phenol-formaldehyde resin modified, barite, one in nanometer chromium powder
Kind.These anti-corrosion materials are form compact and stable, resistance to strong acid, and especially hydrogen fluoride resistant corrosive effect is good.
B, it is assembled into pneumatic buffer 3, air inlet buffer 3 is made of import 19, outlet 16, gas flow 18 and buffer,
Buffer then includes motor 27, area's shoulder 26, connecting plate 25, reciprocating gear 24, active gear shaft 23 and steel pole 21.When assembling, by area
One end of shoulder 26 is connect with motor 27, and the other end connects connecting plate 25, then connecting plate 25 is connected on reciprocating gear 24, from toward
Gear compound 24 connects active gear shaft 23, then active gear shaft 23 is mounted on the driven gear 22 of steel pole 21 with engagement system, steel
Snout plug 20 is welded in the upper end welding spout plug 17 of bar 21, the lower end of steel pole 21, and spout plug 17 is matched with the outlet 16 of upper end, energy
Enough to block outlet 16 completely, snout plug 20 is matched with the import 19 of lower end, can block import 19 completely.Air inlet buffer 3 is used
In the gas output of reduction unit time, so that the gas pushing quantity of unit time in connecting tube 8 is reduced, its working principle is that: motor 27
After work, drives active gear shaft 23 to rotate, convert rotary motion to by engagement the up and down motion of steel pole 21, moving up
In the process, spout plug 17 blocks outlet 16, and snout plug 20 opens import 19, and hydrogen fluoride gas is run in air inlet buffer 3；It moves up
To after top, steel pole 21 is moved down, and in folding process, snout plug 20 blocks import 19, and spout plug 17 opens outlet 16, hydrogen fluoride
Gas is sent out by air inlet buffer 3；Such loopy moving reduces the unit time displacement of connecting tube 8, reduces hydrogen fluoride gas
Corrosiveness.
C, trial operation is carried out after being completed, and after trial operation is errorless, is assembled into gas outlet 2 by blind flange.
(2) piping connection:
First in reducing multi-pass adapter tube 4, the external coating corrosion-inhibiting coating of connecting tube 8, which selects modified phenol
One of urea formaldehyde, barite, nanometer chromium powder.These anti-corrosion materials are form compact and stable, the corrosion of resistance to strong acid, especially hydrogen fluoride resistant
Effect is good.
Reducing multi-pass adapter tube 4 is connected on air inlet buffer 3 by blind flange again, the reducing multi-pass adapter tube 4 it is external
Mouth quantity is 2, and 3 gauge ports are arranged in the upper surface of reducing multi-pass adapter tube 4；The connection connecting tube 8 on each external tapping, two
The other end of connecting tube 8 connects scrubbing tower 15.
Connecting tube 8 is formed by short tube 11, corrugated expansion joint 10 and with adapter tube short tube 9, and corrugated expansion joint 10 is connected to
Middle position, corrugated expansion joint 10 are that connecting tube 8 provides thermal compensation, compensation connecting tube 8 be heated caused by by thermal expansion length,
The planform of connecting tube 8 is kept to stablize because of the stress caused by power that expands with heat and contract with cold to weaken or eliminate.Connecting tube 8 is installed
After, small-sized cooler 12 is carried on the surface of corrugated expansion joint 10.Pressure is packed into after piping connection on gauge port
Tension gauge table 5, temperature instrument 6 and hydrogen fluoride gas detect instrument 7；
(3) it is connected in connecting tube 8 and connects water pipe 13 at scrubbing tower 15, solenoid valve 14 is installed on water pipe 13, and phase is set
The middle power control box answered, solenoid valve 14, air inlet buffer 3 and small-sized cooler 12 are wired to the interface of middle power control box
On, it is directly controlled by middle power control box, pressure instrumentation 5, temperature instrument 6 and hydrogen fluoride gas detection instrument 7 are transferred to
In middle power control box.
It include signal conversion circuit, signal recognition circuit and logic control circuit, signal conversion circuit in middle power control box
Input terminal and pressure instrumentation 5, temperature instrument 6 and hydrogen fluoride gas detection instrument 7 connect, signal conversion circuit
Output end connection signal identification circuit, the output end of signal recognition circuit connect logic control circuit, logic control circuit control
Solenoid valve 14, air inlet buffer 3 and small-sized cooler 12.Signal conversion circuit can be by pressure instrumentation 5, temperature monitor
The signal that table 6 and hydrogen fluoride gas detection instrument 7 detect is converted into electric signal, then the electric signal is transferred to signal identification electricity
Road, signal recognition circuit identify and determine the electric signal, issue corresponding control by signal of the logic control circuit to identification and refer to
It enables.Thus automatic control function of the power control box for solenoid valve 14, air inlet buffer 3 and small-sized cooler 12 in realizing.
(4) pipe interface position air-leakage test:
Nitrogen is filled with into converter 1, nitrogen detects the air-tightness of locations of structures everywhere from converter 1 to each tube runs,
Next process can be carried out after air-leakage test is errorless.It can guarantee that hydrogen fluoride gas does not leak by air-leakage test,
The safety of production is improved, the probability that safety accident occurs is reduced.
(5) outlet:
Preparation react start 8min after, open air inlet buffer 3, hydrogen fluoride gas dispersion inflow connecting tube 8 in, then
Scrubbing tower 15 is sent by connecting tube 8；It is 75 DEG C that maximum temperature is preset in middle power control box, and minimum temperature is 70 DEG C, hydrogen fluoride gas
Maximum concentration be 1.03g/mL, the minimum concentration of hydrogen fluoride gas is 0.82 g/mL；
When detecting temperature and being higher than 75 DEG C, temperature signal is transferred to middle power control box by temperature instrument 6, middle power control box according to
The temperature signal controls small-sized cooler 12 and starts to work, the gas temperature with the work of small-sized cooler 12, inside connecting tube 8
Degree reduces, and after being down to 70 DEG C, small-sized cooler 12 stops working, to maintain the gas temperature in connecting tube 8, reduces fluorination
The corrosive effect of hydrogen.
When detectable concentration is higher than 1.03g/mL, hydrogen fluoride gas detects instrument 7 and the signal is transferred to middle power control box, middle control
Electronic box slows down according to the motor 27 that the signal controls air inlet buffer 3, and air inlet gradually becomes slowly, in reducing multi-pass adapter tube 4
The decline of hydrogen fluoride gas concentration, and maintain on a certain concentration value lower than 1.03g/mL；When detectable concentration is lower than 0.82g/mL,
Hydrogen fluoride gas detects instrument 7 and the signal is transferred to middle power control box, and middle power control box controls air inlet buffer 3 according to the signal
Motor 27 accelerates, and air inlet is gradually accelerated, and the hydrogen fluoride gas concentration in reducing multi-pass adapter tube 4 rises, and maintains a certain be higher than
On the concentration value of 0.82g/mL.
(6) pipeline washs: when the detectable concentration of hydrogen fluoride gas is lower than 0.089g/mL, showing that reaction is completed, at this time middle control
Electronic box automatically turns on solenoid valve 14, washs connecting tube 8 and reducing multi-pass adapter tube 4 using current scour method, washs 5min.Washing
Afterwards, the solution in converter 1 is taken out, obtains hydrogen fluoride solution after purified, filtering.Hydrogen fluoride solution recoverable, meets section
The production theory of environmental protection is learned, there is certain economic benefit.
Corrosivity monitor:
The equipment investment uses latter year, and connecting tube 8 is dismantled, and detects the corrosion rate of 8 inner wall of connecting tube；Enchashment simultaneously
There is equipment using the connecting tube 8 after 1 year, detects the corrosion rate of 8 inner wall of connecting tube.Testing result is as shown in table 1:
Table 1
| Connecting tube 8 of the present invention | Corrosion rate (mm/a) | Original equipment connecting tube 8 | Corrosion rate (mm/a) |
| Short tube 111 | 0.11 | Short tube 111 | 0.19 |
| Short tube 112 | 0.07 | Short tube 112 | 0.20 |
| Band adapter tube short tube 91 | 0.09 | Band adapter tube short tube 91 | 0.16 |
| Band adapter tube short tube 92 | 0.013 | Band adapter tube short tube 92 | 0.22 |
The above is only specific embodiments of the present invention, but technical characteristic of the invention is not limited thereto.It is any with this hair
Based on bright, to solve essentially identical technical problem, essentially identical technical effect is realized, made ground simple change, etc.
With replacement or modification etc., all it is covered by among protection scope of the present invention.
Claims (9)
1. a kind of anhydrous hydrofluoric acid production line converter exhausting method, it is characterised in that include the following steps:
(1) air inlet buffer assembles；
(2) piping connection: first in reducing multi-pass adapter tube, the external coating corrosion-inhibiting coating of connecting tube, then will be different by blind flange
Diameter multi-pass adapter tube is connected on air inlet buffer, and the external tapping quantity of reducing multi-pass adapter tube is more than or equal to 2, and reducing multi-pass connects
3 gauge ports are arranged in the upper surface of pipe；Connecting tube is connected on external tapping, the other end of connecting tube connects scrubbing tower；Connecting tube
After the installation is completed, small-sized cooler is carried in connecting tube；After piping connection on gauge port be packed into pressure instrumentation,
Temperature instrument and hydrogen fluoride gas detect instrument；
(3) water pipe is connected at connecting tube connection scrubbing tower, solenoid valve is installed on water pipe, and power control box in corresponding is set,
Solenoid valve, air inlet buffer and small-sized cooler are wired on the interface of middle power control box, direct by middle power control box
Control, pressure instrumentation, temperature instrument and hydrogen fluoride gas detection instrument are transferred in middle power control box；
(4) pipe interface position air-leakage test；
(5) after beginning 5-10min is reacted in preparation, air inlet buffer, the inflow connecting tube of hydrogen fluoride gas dispersion outlet: are opened
In, then scrubbing tower is sent by connecting tube；It is 75-80 DEG C that maximum temperature is preset in middle power control box, and minimum temperature is 65-70 DEG C, fluorine
The maximum concentration for changing hydrogen is 0.98-1.05g/mL, and the minimum concentration of hydrogen fluoride gas is 0.75-0.82g/mL；Detection temperature
When degree is higher than maximum temperature, small-sized cooler is started to work, and work to temperature minimizes temperature or less；Detectable concentration is higher than most
High concentration reduces air inlet buffer operating rate, when detectable concentration is lower than minimum concentration, accelerates air inlet buffer operating rate；
(6) pipeline wash: the detectable concentration of hydrogen fluoride gas be lower than 0.081-0.121g/mL when, show reaction complete, at this time in
Power control box automatically turns on solenoid valve, washs connecting tube using current scour method and reducing multi-pass is taken over, wash 2-5min.
2. a kind of anhydrous hydrofluoric acid production line converter exhausting method according to claim 1, it is characterised in that: assembling air inlet is slow
Device is rushed, air inlet buffer is made of import, outlet, gas flow and buffer, and buffer then includes motor, transmission mechanism, master
The output end of motor is connected on the input terminal of transmission mechanism by movable tooth axis and steel pole, and the output end of transmission mechanism is connected to master
On movable tooth axis, then active gear shaft is mounted on the driven gear of steel pole with engagement system, spout plug, steel are welded in the upper end of steel pole
Weld snout plug in the lower end of bar；Trial operation is carried out after being completed, and after trial operation is errorless, is assembled into outlet by blind flange
In mouthful.
3. a kind of anhydrous hydrofluoric acid production line converter exhausting method according to claim 2, it is characterised in that: in assembling air inlet
Before buffer, each components are taken, in each component surface brushing corrosion-inhibiting coating.
4. a kind of anhydrous hydrofluoric acid production line converter exhausting method according to claim 2, it is characterised in that: transmission mechanism by
Area's shoulder, connecting plate and reciprocating gear composition, when assembling, one end of area's shoulder is connected to motor, and the other end connects connecting plate, then will
Connecting plate is connected on reciprocating gear and connects active gear shaft by reciprocating gear.
5. a kind of anhydrous hydrofluoric acid production line converter exhausting method according to claim 3, it is characterised in that: corrosion-inhibiting coating is equal
Select one of phenol-formaldehyde resin modified, barite, nanometer chromium powder.
6. a kind of anhydrous hydrofluoric acid production line converter exhausting method according to claim 1, it is characterised in that: connecting tube is by short
Pipe, corrugated expansion joint and with adapter tube short tube composition, corrugated expansion joint is connected between position, the surface of corrugated expansion joint
Carry small-sized cooler.
7. a kind of anhydrous hydrofluoric acid production line converter exhausting method according to claim 1, it is characterised in that: in middle power control box
It include signal conversion circuit, signal recognition circuit and logic control circuit, the input terminal and pressure detecting of signal conversion circuit
Instrument, temperature instrument and hydrogen fluoride gas detection instrument connection, the output end connection signal of signal conversion circuit identify electricity
Road, the output end of signal recognition circuit connect logic control circuit, and logic control circuit controls solenoid valve, air inlet buffer and small
Type cooler.
8. a kind of anhydrous hydrofluoric acid production line converter exhausting method according to claim 1, it is characterised in that: the step
(4) specific steps of air-leakage test in are as follows: nitrogen is filled with into converter, for nitrogen from converter to each tube runs, detection is each
The air-tightness for locating locations of structures, can carry out next process after air-leakage test is errorless.
9. a kind of anhydrous hydrofluoric acid production line converter exhausting method according to claim 1, it is characterised in that: the step
(6) after the completion of washing, the solution in converter is taken out, obtains hydrogen fluoride solution after purified, filtering.
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| CN205187846U (en) * | 2015-10-20 | 2016-04-27 | 福建龙氟化工有限公司 | Emergent air exhaust device of hydrogen fluoride reaction converter |
| CN207002251U (en) * | 2017-06-02 | 2018-02-13 | 江西中氟化工有限公司 | A kind of condenser system for hydrogen fluoride production |
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| US2296118A (en) * | 1940-04-08 | 1942-09-15 | Gen Chemical Corp | Process of producing hydrofluoric acid low in fluosilicic acid |
| CN1450976A (en) * | 2000-07-10 | 2003-10-22 | 大金工业株式会社 | Method and apparatus for producing hydrogen fluoride |
| US20040141899A1 (en) * | 2003-01-03 | 2004-07-22 | Desiccant Technology Corporation | Device and method for processing toxic gasses in vortex reacting chamber |
| JP2004352517A (en) * | 2003-05-27 | 2004-12-16 | Daikin Ind Ltd | Method and device for manufacturing hydrogen fluoride |
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| CN109289444B (en) | 2021-01-15 |
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