CN205974320U - Getting rid of and recovery system of difluoro methyl chloride by -product hydrogen chloride - Google Patents
Getting rid of and recovery system of difluoro methyl chloride by -product hydrogen chloride Download PDFInfo
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- CN205974320U CN205974320U CN201620724289.6U CN201620724289U CN205974320U CN 205974320 U CN205974320 U CN 205974320U CN 201620724289 U CN201620724289 U CN 201620724289U CN 205974320 U CN205974320 U CN 205974320U
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Abstract
The utility model discloses a getting rid of and recovery system of difluoro methyl chloride by -product hydrogen chloride, according to main fluorination reactor, concentration tower, graphitic absorber and the water wash column of establishing ties in proper order that include of the gaseous trend of result, the delivery port of water wash column still communicates the dilute acid bath, and this dilute acid bath passes through the elevator pump and further communicates the graphitic absorber, the delivery port intercommunication hydrochloric acid storage tank of graphitic absorber, the graphitic absorber is including the one -level graphitic absorber and the second grade graphitic absorber of establishing ties in proper order, the water wash column is including one -level water wash column of establishing ties in proper order and the second grade water wash column that communicates external inlet tube, the outlet pipe of second grade water wash column is connected to the dilute acid bath, still is provided with loop pipe on the dilute acid bath, and this loop pipe other end is connected in second grade water wash column intake pipe. The utility model discloses more changed the dilute acid bath into by former uncovered formula closedly, formed the circulation of confined, avoided the pollution to the environment, also reduced production simultaneously and consumed.
Description
Technical field
The utility model is related to a kind of removal of chemicals accessory substance and recovery system, specially monochlorodifluoromethane by-product
The removal of hydrogen chloride and recovery system.
Background technology
Monochlorodifluoromethane（HCFC-22）It is mainly used as refrigerant, the propellant in inhalator jar, plastics blowing agent, fire extinguishing
Agent and the raw material as some important Fluorine contained chemicals.
HCFC-22 is due to its suitable boiling point, excellent thermodynamic property, and do not fire, safe the features such as, make it low
Gently applied on a large scale on middle temperature refrigeration plant, particularly middle temperature refrigeration up to -35 DEG C of the evaporating temperature of putting in place, extensively
Include car, ship air-conditioning and cargo refrigeration two aspect and heat pump for industrial refrigeration, air-conditioning, retailing refrigeration, transport refrigeration
The fields such as heat supply.It is a kind of important refrigerant.Especially because its ODP is very low, only 0.055, GWP is relatively low, and covers
Paul Tellier protocol regulation can use the year two thousand thirty（Developed country）Or the year two thousand forty（Developing country）, therefore, HCFC- in recent years
22 as CFC12 transitional substitute, paid attention to by various countries, and occur in civilian refrigeration plant in the form of mix refrigerant
On, such as refrigerator, refrigerator-freezer etc..There is R-401 series in the mixed cooling medium containing HCFC-22 using now（R-22/152a/
124）, R-402 series（R-22/125/290）, R-403 series（R-22/290/218）、R-405A（R-22/152a/142b/
c318）、R-406A（R-22/600a/142b）, R-408A (R-22/125/143a), R-409 series（R-22/124/142b）And
R-22/152a series etc., there are different proportionings, the trade mark and trade name in each company of various countries.Haier of China, the western green ice such as cold
On case, cool cabinet, all high-volume uses.
In terms of the foam plastic foaming agent such as extruded polystyrene sheet material, sheet material and polyolefin, HCFC-22 and it and
The mixture of HCFC-142, the substitute as CFC-12 has started to be applied.
As aerosol propellant, HCFC-22 and its and the mixture of HCFC-142b also the substitute as CFC-12 is opened
Begin to have applied.
In terms of extinguishing chemical, the mixing extinguishing chemical with NAFS3 as the trade mark for the HCFC-22/123/124, as Halonl301's
Substitute existing commodity listing, domestic also have supply of commodities.
HCFC-22 is also the raw material of important Fluorine contained chemicals, and topmost purposes is used for preparing polytetrafluoroethylene (PTFE), uses
CHC1F2Pyrogenically prepared tetrafluoroethylene monomer, then it is polymerized to polyflon.
HCFC-22 still prepares the raw material of HFC-23.HFC-23 can make cryogenic coolant, substitutes CFC-13, or substitutes R-
503（R-23/13,40.1/59.9）, its ODP is zero, and evaporating temperature is up to less than -60 DEG C.HFC-23 is also to prepare extinguishing chemical
The raw material of Halon1301, due to HFC-23 low boiling point, vapour pressure is high, and traffic expense is high, and therefore producing Halon1301 is all to use
HCFC-22 is produced in situ in HFC-23, then prepares Halon1301's.So HCFC-22 namely prepares the raw material of Halon1301.
As heat pump refrigerant, most typical be exactly air conditioner to HCFC-22.The feature that air-conditioner heat pump heats is only to need
Input minimal amount of electric energy it is possible to the low-grade energy in surrounding environment is converted into have sufficiently high temperature can profit
Heat., up to more than 3, operating cost is low for the efficiency ratio that heat pump heats, but investment is high.Winter is warmed oneself with heat pump air conditioner, consumption
Electricity only has 1/3rd of electric heating equipment to be less than, and quick heating.
Technical comparing because preparing HCFC-22 is ripe, and supplies consumption of each manufacturer etc. is all very nearly the same, for response section
Can lower consumption, original technique further be deep-cut and there are potentiality.
At present, raw material obtains mainly containing product HCFC-22, HCl gas after perfluorinated reaction in fluorination reactor
Material, after the concentrated tower of this material is processed, enters in caustic wash tower typically after graphitic absorber and water scrubber and processes further.
In graphitic absorber and water scrubber, sour gas HCl is adsorbed, absorbs, because absorbing in the water after material is washed
HCl forms in the dilute acid bath that low-concentration hcl entrance is made up of PE and is pumped back system again, absorbs HCl gas further, finally
It flow to salt acid storage tank.Wherein dilute acid bath uses opened type structure, connects air by evacuated tube, is carried secretly down by diluted acid on a small quantity
Gas directly discharge in an atmosphere, according to detection and analysis, wherein R22 content is 98%, after tested, 15000 tons of a set of annual production
Unit, reaction feed intake 1160kg/h (HF) when, emptying capacity be 2.4m/h.Its pollution to environment, and the wave of material
Take, can not be ignored.
Utility model content
Technical problem to be solved in the utility model be to provide a kind of removal of monochlorodifluoromethane by-product hydrogen chloride and
Recovery system, this system can improve the rate of recovery to hydrogen chloride gas, can effectively prevent the pollution of the environment simultaneously.
For response environmental protection and energy-saving requirement, solve above technical problem, workshop has carried out technique to this workshop section and changed
Make, the removal of monochlorodifluoromethane by-product hydrogen chloride described in the utility model and recovery system, main according to product gas trend
Including the fluorination reactor being sequentially connected in series, concentration tower, graphitic absorber and water scrubber, the delivery port of described water scrubber also connects dilute
Acid tank, this dilute acid bath connects graphitic absorber, the delivery port connection salt acid storage tank of graphitic absorber, institute further by elevator pump
State graphitic absorber and include the one-level graphitic absorber that is sequentially connected in series and two grades of graphitic absorbers, described water scrubber includes going here and there successively
The one-stage water wash tower of connection connects the outlet pipe of two grades of water scrubbers with two grades of water scrubbers connecting extraneous water inlet pipe, described dilute acid bath,
It is additionally provided with loop pipe, this loop pipe other end is connected in two grades of water scrubber air inlet pipe on dilute acid bath.
Further, the described loop pipe other end is connected in two grades of water scrubber air inlet pipe at two grades of water scrubbers.
Further, described dilute acid bath includes carbon steel shell and PE liner, acidproof, increases its intensity simultaneously again.
Further, the air inlet of described one-level graphitic absorber and two grades of graphitic absorbers is arranged at absorber top,
Gas outlet is arranged at absorber bottom；The air inlet of described one-stage water wash tower and two grades of water scrubbers is arranged at the bottom of tower, gives vent to anger
Mouth is arranged at tower top；The water inlet of described one-level graphitic absorber, two grades of graphitic absorbers, one-stage water wash tower and two grades of water scrubbers
It is arranged at top, delivery port is arranged at bottom or bottom.
Dilute acid bath was replaced with closed by the utility model by former opened type, and material was changed to outside carbon steel by former PE
Shell and PE liner, its original emptying setting is then connected with water scrubber air inlet pipe by pipeline, material is thus formed an envelope
The circulation closed, it is to avoid pollution to environment, also reduces production simultaneously and consumes, according to calculating：A set of R22 production unit, one
Year material about more than 40 ton thus saved, be converted to product about more than 20 ton.
Brief description
Fig. 1 is structural representation of the present utility model.
In figure：1- fluorination reactor；2- concentration tower；3- one-level graphitic absorber；Bis- grades of graphitic absorbers of 4-；5- one-level water
Wash tower；Bis- grades of water scrubbers of 6-；No. bis- water scrubber air inlet pipe of 61-；7- dilute acid bath；71- loop pipe；8- elevator pump.
Specific embodiment
With reference to specific embodiment and referring to the drawings, the utility model is further described.
Embodiment 1：As shown in figure 1, the removal of monochlorodifluoromethane by-product hydrogen chloride described in the utility model and recovery system
System, main inclusion fluorination reactor 1, fluorination reactor 1 connects concentration tower 2, and concentration tower 2 passes through gas further according to product gas trend
Xiang Guan（In figure is indicated by the solid line）It is sequentially connected in series 3, two grades of graphitic absorbers 4 of one-level graphitic absorber, one-stage water wash tower 5 and two grades
Water scrubber 6, the top of two grades of water scrubbers 6 connects to caustic wash tower, and the top of two grades of water scrubbers 6 is also associated with water inlet pipe.One-level stone
Gas phase pipe on black reactor 3 and two grades of graphiote reactors 4 is arranged for upper entering and lower leaving, on one-stage water wash tower 5 and two grades of water scrubbers 6
Gas phase pipe be bottom in and top out setting.
Pipeline communication dilute acid bath 7 is passed through in the bottom of two grades of water scrubbers 6, and the bottom of dilute acid bath 7 is by the diluted acid with elevator pump 8
Pipe（In figure is represented by dashed line）Connect to the top of one-stage water wash tower 5,5, two grades of graphitic absorbers 4 of one-stage water wash tower and one-level stone
Pass through diluted acid pipe between black absorber 3（In figure is represented by dashed line）Opposite direction connection, is upper entering and lower leaving setting.In dilute acid bath 7
Top connects to the gas phase pipe between one-stage water wash tower 5 and two grades of water scrubbers 6, i.e. two grades of water scrubber air inlets also by loop pipe 71
On pipe 61, and it is located at two grades of water scrubbers 6.
The PE that wherein dilute acid bath 7 includes carbon steel shell and is arranged at carbon steel inside the shell（Polyethylene）Liner.
When product from fluorination reactor 1 out after, enter concentration tower 2 in, then from the top of concentration tower 2 successively from
The top of one-level graphitic absorber 3 enters, and goes out in bottom；Enter from two grades of graphitic absorber 4 tops again, go out in bottom, reaction
Accessory substance HCl in product is adsorbed in two-stage graphitic absorber.From two grades of graphitic absorbers 4 material out more successively from
One-stage water wash tower 5 bottom enters, and goes out in top；Two grades of water scrubber 6 bottoms enter, and go out in top, from two grades after two-stage washing
Go out in caustic wash tower in water scrubber 6 top.While material is walked, water enters from two grades of water scrubber 6 tops from water inlet pipe and washes
Wash material, obtain concentration after absorbing the HCl in material relatively low（About 7% concentration）Hydrochloric acid, this liquid flows in dilute acid bath 7, then leads to
Cross elevator pump 8 and deliver to one-stage water wash tower 5 and washed, using high potential difference, sour water flows into two grades of graphitic absorbers 4, absorbs its suction
Flow into one-level graphitic absorber 3 again after attached sour gas, absorbed again, final liquid（The hydrochloric acid of concentration >=30%）From
One-level graphitic absorber 3 bottom flows out in salt acid storage tank.
And the gas emptying that in dilute acid bath 7, diluted acid is carried secretly then enters two grades of water scrubber air inlet pipe 61 by loop pipe 71, with
Material enters in two grades of water scrubbers 6, continues washing.
Claims (4)
1. a kind of removal of monochlorodifluoromethane by-product hydrogen chloride and recovery system, according to the main inclusion of product gas trend successively
The fluorination reactor of series connection（1）, concentration tower（2）, graphitic absorber and water scrubber, the delivery port of described water scrubber also connects diluted acid
Groove（7）, this dilute acid bath（7）By elevator pump（8）Connect graphitic absorber, the delivery port connection hydrochloric acid of graphitic absorber further
Storage tank it is characterised in that：Described graphitic absorber includes the one-level graphitic absorber being sequentially connected in series（3）With two grades of graphitic absorbers
（4）, described water scrubber includes the one-stage water wash tower being sequentially connected in series（5）With two grades of water scrubbers connecting extraneous water inlet pipe（6）, described
Dilute acid bath（7）Connect two grades of water scrubbers（6）Outlet pipe, dilute acid bath（7）On be additionally provided with loop pipe（71）, this loop pipe（71）
The other end is connected to two grades of water scrubber air inlet pipe（61）On.
2. according to claim 1 the removal of monochlorodifluoromethane by-product hydrogen chloride and recovery system it is characterised in that：Described
Loop pipe（71）The other end is connected to two grades of water scrubber air inlet pipe（61）Upper close two grades of water scrubbers（6）Place.
3. according to claim 1 the removal of monochlorodifluoromethane by-product hydrogen chloride and recovery system it is characterised in that：Described
Dilute acid bath（7）Including carbon steel shell and PE liner.
4. according to claim 1 the removal of monochlorodifluoromethane by-product hydrogen chloride and recovery system it is characterised in that：Described
One-level graphitic absorber（3）With two grades of graphitic absorbers（4）Air inlet be arranged at absorber top, gas outlet is arranged at absorption
Device bottom；Described one-stage water wash tower（5）With two grades of water scrubbers（6）Air inlet be arranged at the bottom of tower, gas outlet is arranged at tower
Top；Described one-level graphitic absorber（3）, two grades of graphitic absorbers（4）, one-stage water wash tower（5）With two grades of water scrubbers（6）Water inlet
Mouth is arranged at top, and delivery port is arranged at bottom or bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620724289.6U CN205974320U (en) | 2016-07-05 | 2016-07-05 | Getting rid of and recovery system of difluoro methyl chloride by -product hydrogen chloride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620724289.6U CN205974320U (en) | 2016-07-05 | 2016-07-05 | Getting rid of and recovery system of difluoro methyl chloride by -product hydrogen chloride |
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| Publication Number | Publication Date |
|---|---|
| CN205974320U true CN205974320U (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620724289.6U Active CN205974320U (en) | 2016-07-05 | 2016-07-05 | Getting rid of and recovery system of difluoro methyl chloride by -product hydrogen chloride |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109264672A (en) * | 2018-11-13 | 2019-01-25 | 乳源东阳光氟树脂有限公司 | A kind of hydrogen chloride water absorption system and its application |
-
2016
- 2016-07-05 CN CN201620724289.6U patent/CN205974320U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109264672A (en) * | 2018-11-13 | 2019-01-25 | 乳源东阳光氟树脂有限公司 | A kind of hydrogen chloride water absorption system and its application |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |