CN110304988A - A kind of process and recovery system of acid methanol-fueled exhaust recycling chloromethanes - Google Patents
A kind of process and recovery system of acid methanol-fueled exhaust recycling chloromethanes Download PDFInfo
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- CN110304988A CN110304988A CN201910694531.8A CN201910694531A CN110304988A CN 110304988 A CN110304988 A CN 110304988A CN 201910694531 A CN201910694531 A CN 201910694531A CN 110304988 A CN110304988 A CN 110304988A
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- methanol
- gas
- inlet pipe
- chloromethanes
- tube
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- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical class ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 238000011084 recovery Methods 0.000 title claims abstract description 28
- 238000004064 recycling Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000008569 process Effects 0.000 title claims abstract description 14
- 239000002253 acid Substances 0.000 title claims description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 135
- 239000007788 liquid Substances 0.000 claims abstract description 56
- 238000006243 chemical reaction Methods 0.000 claims abstract description 40
- 239000003054 catalyst Substances 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000000746 purification Methods 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 238000000926 separation method Methods 0.000 claims abstract description 10
- 229940050176 methyl chloride Drugs 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 87
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 42
- 238000010521 absorption reaction Methods 0.000 claims description 39
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 32
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims description 32
- 238000002156 mixing Methods 0.000 claims description 6
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 3
- 239000007791 liquid phase Substances 0.000 claims description 3
- 239000011592 zinc chloride Substances 0.000 claims description 3
- 235000005074 zinc chloride Nutrition 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 2
- 230000001476 alcoholic effect Effects 0.000 claims 1
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 19
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000012824 chemical production Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 239000003205 fragrance Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002896 organic halogen compounds Chemical class 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/093—Preparation of halogenated hydrocarbons by replacement by halogens
- C07C17/16—Preparation of halogenated hydrocarbons by replacement by halogens of hydroxyl groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/38—Separation; Purification; Stabilisation; Use of additives
Abstract
The invention discloses the processes and recovery system of a kind of sour methanol-fueled exhaust recycling chloromethanes, including device for absorbing tail gas, heating device is provided on the right side of the device for absorbing tail gas, reaction unit is provided on the right side of the heating device, top is provided with gas-liquid separation device on the right side of the reaction unit, purification device is provided on the right side of the reaction unit, recyclable device is provided on the right side of the purification device, exhaust gas and methanol can be mixed the mixed sour methanol of merga pass and prepare methyl chloride gas by the present invention, tail gas is recycled, it increases economic efficiency, reduce discharge and pollution；Waste liquid amount in removal process is few, including catalyst, methanol and water can be recycled, and high efficiency, benefit is evident for emission reduction, and effectively tail gas recycle is added in industrial chain, turns waste into wealth, is worthy to be popularized.
Description
Technical field
The present invention relates to sour methanol-fueled exhaust recovery technology field, specially a kind of technique of sour methanol-fueled exhaust recycling chloromethanes
Method and recovery system.
Background technique
Hydrogen chloride is the gas of colourless, irritant smell, is highly soluble in water, be mainly used for system dye, fragrance, drug,
Various chlorides and corrosion inhibitor synthesis.Hydrochloric acid is the aqueous solution also known as hydrochloric acid of hydrogen chloride, is colourless to faint yellow saturating
Prescribed liquid, is one of chemical production process customary acid, and technical hydrochloric acid is generally configured to 30% or so content.Industrially prepared salt
Sour main method is electrolysis saturated salt solution, obtains sodium hydroxide, hydrogen, chlorine product, combustion reaction is raw again for hydrogen and chlorine
At hydrogen chloride gas, being absorbed with water becomes hydrochloric acid.In addition, there are also from a wealth of sources to be rich in hydrogen chloride gas in chemical production process
The tail gas of body is sold or is comprehensively utilized as by-product hydrochloric acid after often absorbing.Sour methanol is that the methanol of hydrogen chloride is molten
Liquid, to be colourless to light yellow transparent liquid, industrial acids methanol is generally its saturated solution, and wherein hydrogen chloride content is generally in 20-
35%.It is mainly used for playing the role of blocking group to anhydrous response acid adding in terms of the organic syntheses such as medicine, pesticide.
Chloromethanes is colourless liquescent gas, pressurized liquefied to be stored in steel cylinder.Belong to organohalogen compounds, is slightly soluble in water, is soluble in chlorine
Imitative, ether, ethyl alcohol, acetone.It is mainly used as the raw material of organosilicon, also serves as solvent, refrigerant, fragrance etc..Can by hydrogen chloride and
Methanol reacts generation under catalysts conditions.
So the tail gas containing many hydrogen chloride is recycled, and chloromethanes is produced, can be improved industrial warp
Ji benefit, reduces the discharge of harmful substance in tail gas, turns waste into wealth, and therefore, it is necessary to a kind of sour methanol-fueled exhaust recycling chloromethanes
Process and recovery system.
Summary of the invention
The purpose of the present invention is to provide the processes and recovery system of a kind of sour methanol-fueled exhaust recycling chloromethanes, with solution
Certainly the problems mentioned above in the background art.
To achieve the above object, the invention provides the following technical scheme:
A kind of recovery system of acid methanol-fueled exhaust recycling chloromethanes, including device for absorbing tail gas, the device for absorbing tail gas
Right side is provided with heating device, and reaction unit is provided on the right side of the heating device, and top is provided on the right side of the reaction unit
Gas-liquid separation device, the reaction unit right side are provided with purification device, are provided with recyclable device on the right side of the purification device.
As a further solution of the present invention: the device for absorbing tail gas includes absorption tower, the absorption tower appearance surface cover
Equipped with the first spiral heat exchange tube, first spiral heat exchange tube both ends nozzle is separately connected the first water inlet pipe and the first outlet pipe,
It is connected with tail gas inlet pipe above the absorption tower left side, is connected with absorbing liquid inlet pipe on the left of the absorption tower bottom face, it is described
Pressure dial plate is installed on absorption tower.
As further scheme of the invention: the heating device includes liquid pump, the liquid pump input terminal and absorption tower
Outlet tube is connected on the right side of bottom face, the liquid pump output end is connected with heater box, installs having heaters in the heater box.
As further scheme of the invention: the reaction unit includes reaction tower, below the reaction tower left side
Air inlet pipe is connected between heater box, the reaction tower bottom face is connected with catalyst inlet pipe.
As further scheme of the invention: the gas-liquid separation device includes separator, and the separator upper end is used
Escape pipe is connected between above the reaction tower right side, the separator lower end connects outlet tube one end, and the outlet tube is another
One end is connect with escape pipe.
As further scheme of the invention: the purification device includes purifying column, and the purifying column outer surface is arranged
There is the second spiral heat exchange tube, second spiral heat exchange tube both ends nozzle is connected separately with the second water inlet pipe and the second outlet pipe,
The purifying column lower end is connected with absorbing liquid inlet pipe, connects between the top of separator right side above the purifying column left side
There is purification absorption tube.
As the present invention further scheme: the recyclable device includes compressor, the compressor input terminal and net
The upper end Hua Ta is connected with recovery tube, and the compressor output end connects discharge nozzle one end, and the discharge nozzle other end is connected with back
Closed cans.
As further scheme of the invention: the tail gas inlet pipe, air inlet pipe, catalyst inlet pipe, goes out absorbing liquid inlet pipe
Valve is provided on tracheae, purification absorption tube, recovery tube, absorbing liquid inlet pipe and discharge nozzle.
A kind of process based on a kind of above-mentioned sour methanol-fueled exhaust recycling chloromethanes, comprising the following steps:
S1: the tail gas containing hydrogen chloride gas enters in absorption tower from tail gas inlet pipe, and absorbing liquid inlet pipe is constantly to absorption tower
Interior supplement methanol solution, hydrogen chloride gas and methanol solution in tail gas are mixed to form sour methanol solution, tail gas and methanol solution
A large amount of heat can be generated when mixing, the water of the first spiral heat exchange tube internal circulation flow takes away the heat of mixing；
S2: the sour methanol solution in step S1 is extracted out and is pumped into heater box by liquid pump, and the heater in heater box is to acid
Methanol solution is heated, and methanol and hydrogen chloride gas are obtained；
The methanol and hydrogen chloride gas of S3: step S2 obtained heat enter in reaction tower, from catalyst inlet pipe to reaction tower
Interior injection zinc chloride catalyst solution, hot methanol and hydrogen chloride gas are reacted under the action of catalyst, generate chloromethanes
Gas；
S4: containing water, methanol, hydrogen chloride and chloromethanes from the gas obtained after reaction tower reaction, which, which enters, divides
From in device, the liquid phase in mixed gas is included that catalyst and water are separated and are discharged by outlet tube and flowed back into instead by separator
Ying Tazhong is recycled；
S5: the mixed gas after gas-liquid separation in step S4 is chloromethanes and its a small amount of methanol and hydrogen chloride gas
Body, mixed gas are entered in purifying column by purifying absorption tube, the absorbing liquid in purifying column by methanol and absorbing hydrogen chloride gas,
Liquid after absorption is collected, and can be put into absorption tower and is recycled；
S6: the methyl chloride gas by purification is entered in compressor 28 by recovery tube 27, and compressor 28 is by chloromethanes gas
Body compresses and liquefies as liquid, and is injected into recycling can 30 and is collected by discharge nozzle 29.
As further scheme of the invention: the gas temperature control in the step S2 after heater heats exists
180℃。
As further scheme of the invention: the catalyst concn in the step S3 is maintained at 60%.
Compared with prior art, the beneficial effects of the present invention are: the present invention can mix exhaust gas and the mixed merga pass of methanol
Sour methanol after conjunction prepares methyl chloride gas, recycles, increases economic efficiency to tail gas, reduces discharge and pollution；It recycled
Waste liquid amount in journey is few, including catalyst, methanol and water can be recycled, and high efficiency, benefit is evident for emission reduction, effectively
Tail gas recycle is added in industrial chain, turns waste into wealth, is worthy to be popularized.
Detailed description of the invention
Fig. 1 recycles the process of chloromethanes and the overall structure diagram of recovery system for a kind of sour methanol-fueled exhaust；
Fig. 2 is that a kind of device for absorbing tail gas structure of process and recovery system that sour methanol-fueled exhaust recycles chloromethanes is shown
It is intended to.
In figure: the first water inlet pipe of 1-, the second water inlet pipe of 2-, the first spiral heat exchange tube of 3-, 4- absorbing liquid inlet pipe, 5- tail gas into
Pipe, 6- pressure dial plate, the absorption tower 7-, 8- device for absorbing tail gas, 9- outlet tube, 10- liquid pump, 11- air inlet pipe, 12- heater,
13- reaction tower, 14- reaction unit, 15- heater box, 16- heating device, 17- catalyst inlet pipe, 18- escape pipe, 19- separation
Device, 20- purify absorption tube, 21- outlet tube, the second spiral heat exchange tube of 22-, the second outlet pipe of 23-, 24- purification device, 25- the
Two water inlet pipes, 26- purifying column, 27- recovery tube, 28- compressor, 29- discharge nozzle, 30- recycling can, 31- recyclable device, 32- gas
Liquid separating apparatus, 33- absorbing liquid inlet pipe.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1~2 are please referred to, the present invention provides a kind of technical solution: a kind of recycling system of acid methanol-fueled exhaust recycling chloromethanes
It unites, including device for absorbing tail gas 8, heating device 16,10 right side of heating device is provided on the right side of the device for absorbing tail gas 8
It is provided with reaction unit 14, the 14 right side top of reaction unit is provided with gas-liquid separation device 32, and the reaction unit 14 is right
Side is provided with purification device 24, and recyclable device 31 is provided on the right side of the purification device 24, and the device for absorbing tail gas 8 includes inhaling
Tower 7 is received, 7 outer surface of absorption tower is arranged with the first spiral heat exchange tube 3,3 both ends nozzle of the first spiral heat exchange tube difference
The first water inlet pipe 1 and the first outlet pipe 2 are connected, is connected with tail gas inlet pipe 5, the absorption tower 7 above 7 left side of absorption tower
It is connected with absorbing liquid inlet pipe 4 on the left of bottom face, pressure dial plate 6 is installed on the absorption tower 7, the heating device 16 includes liquid
It is connected with outlet tube 9 on the right side of pump 10,10 input terminal of liquid pump and 7 bottom face of absorption tower, 10 output end of liquid pump is connected with
Heater box 15, the heater box 15 is interior to install having heaters 12, and the reaction unit 14 includes reaction tower 13, the reaction tower 13
It is connected with air inlet pipe 11 between heater box 15 below left side, 13 bottom face of reaction tower is connected with catalyst inlet pipe 17,
The gas-liquid separation device 32 includes separator 19, and 19 upper end of separator between the top of 13 right side of reaction tower for connecting
There is escape pipe 18,19 lower end of separator connects 21 one end of outlet tube, and 21 other end of outlet tube is connect with escape pipe 18,
The purification device 24 includes purifying column 26, and 26 outer surface of purifying column is arranged with the second spiral heat exchange tube 22, and described second
22 both ends nozzle of spiral heat exchange tube is connected separately with the second water inlet pipe 25 and the second outlet pipe 23,26 lower end of the purifying column connection
There is absorbing liquid inlet pipe 33, is connected with purification absorption tube between the top of 19 right side of separator above 26 left side of purifying column
20, the recyclable device 31 includes compressor 28, and 28 input terminal of compressor and 26 upper end of purifying column are connected with recovery tube 27,
28 output end of compressor connects 29 one end of discharge nozzle, and 29 other end of discharge nozzle is connected with recycling can 30, the tail gas
Inlet pipe 5, absorbing liquid inlet pipe 4, air inlet pipe 11, catalyst inlet pipe 17, escape pipe 18, purification absorption tube 20, recovery tube 27, absorbing liquid
Valve is provided on inlet pipe 33 and discharge nozzle 29.
A kind of process based on a kind of above-mentioned sour methanol-fueled exhaust recycling chloromethanes, comprising the following steps:
S1: the tail gas containing hydrogen chloride gas enters in absorption tower 7 from tail gas inlet pipe 5, and absorbing liquid inlet pipe 4 is constantly to absorption
Methanol solution is supplemented in tower 7, the hydrogen chloride gas and methanol solution in tail gas are mixed to form sour methanol solution, and tail gas is molten with methanol
Liquid can generate a large amount of heat when mixing, and the water of 3 internal circulation flow of the first spiral heat exchange tube takes away the heat of mixing；
S2: the sour methanol solution in step S1 is extracted out and is pumped into heater box 15 by liquid pump 10, the heating in heater box 15
12 pairs of device sour methanol solutions heat, and obtain methanol and hydrogen chloride gas；
The methanol and hydrogen chloride gas of S3: step S2 obtained heat enter in reaction tower 13, from catalyst inlet pipe 17 to anti-
It answers and injects zinc chloride catalyst solution in tower 13, hot methanol and hydrogen chloride gas are reacted under the action of catalyst, are generated
Methyl chloride gas；
S4: containing water, methanol, hydrogen chloride and chloromethanes from the gas obtained after the reaction of reaction tower 13, which enters
In separator 19, the liquid phase in mixed gas is included that catalyst and water are separated and pass through outlet tube 21 and is discharged by separator 19
It flows back into reaction tower 13 and is recycled；
S5: the mixed gas after gas-liquid separation in step S4 is chloromethanes and its a small amount of methanol and hydrogen chloride gas
Body, mixed gas are entered in purifying column 26 by purification absorption tube 20, and absorbing liquid in purifying column 26 is by methanol and hydrogen chloride gas
Body absorbs, and the liquid after absorption is collected, can put into absorption tower 7 and be recycled；
S6: the methyl chloride gas by purification is entered in compressor 28 by recovery tube 27, and compressor 28 is by chloromethanes gas
Body compresses and liquefies as liquid, and is injected into recycling can 30 and is collected by discharge nozzle 29.
Gas temperature in the step S2 after the heating of heater 12 is controlled at 180 DEG C, urging in the step S3
Agent concentration is maintained at 60%.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (10)
1. a kind of recovery system of acid methanol-fueled exhaust recycling chloromethanes, including device for absorbing tail gas (8), it is characterised in that: described
It is provided with heating device (16) on the right side of device for absorbing tail gas (8), is provided with reaction unit (14) on the right side of the heating device (10),
Top is provided with gas-liquid separation device (32) on the right side of the reaction unit (14), is provided with purification on the right side of the reaction unit (14)
Device (24), purification device (24) right side are provided with recyclable device (31).
2. a kind of recovery system of sour methanol-fueled exhaust recycling chloromethanes according to claim 1, it is characterised in that: the tail
Aspiration receiving apparatus (8) includes absorption tower (7), and absorption tower (7) outer surface is arranged with the first spiral heat exchange tube (3), and described
One spiral heat exchange tube (3) both ends nozzle is separately connected the first water inlet pipe (1) and the first outlet pipe (2), absorption tower (7) left end
It is connected with tail gas inlet pipe (5) above face, is connected with absorbing liquid inlet pipe (4), the absorption tower on the left of absorption tower (7) bottom face
(7) pressure dial plate (6) are installed on.
3. a kind of recovery system of sour methanol-fueled exhaust recycling chloromethanes according to claim 2, it is characterised in that: described to add
Thermal (16) includes liquid pump (10), is connected with outlet tube on the right side of liquid pump (10) input terminal and absorption tower (7) bottom face
(9), liquid pump (10) output end is connected with heater box (15), installs having heaters (12) in the heater box (15).
4. a kind of recovery system of sour methanol-fueled exhaust recycling chloromethanes according to claim 3, it is characterised in that: described anti-
Answering device (14) includes reaction tower (13), is connected with air inlet pipe between heater box (15) below reaction tower (13) left side
(11), reaction tower (13) bottom face is connected with catalyst inlet pipe (17).
5. a kind of recovery system of sour methanol-fueled exhaust recycling chloromethanes according to claim 4, it is characterised in that: the gas
Liquid separating apparatus (32) includes separator (19), and separator (19) upper end between the top of reaction tower (13) right side for connecting
Be connected to escape pipe (18), separator (19) lower end connects outlet tube (21) one end, outlet tube (21) other end with go out
Tracheae (18) connection.
6. a kind of recovery system of sour methanol-fueled exhaust recycling chloromethanes according to claim 5, it is characterised in that: described net
To set (24) include purifying column (26) for makeup, and purifying column (26) outer surface is arranged with the second spiral heat exchange tube (22), and described the
Two spiral heat exchange tubes (22) both ends nozzle is connected separately with the second water inlet pipe (25) and the second outlet pipe (23), the purifying column
(26) lower end is connected with absorbing liquid inlet pipe (33), above purifying column (26) left side and separator (19) right side top
Between be connected with purification absorption tube (20).
7. a kind of recovery system of sour methanol-fueled exhaust recycling chloromethanes according to claim 6, it is characterised in that: described time
Receiving apparatus (31) includes compressor (28), and compressor (28) input terminal and purifying column (26) upper end are connected with recovery tube
(27), compressor (28) output end connects discharge nozzle (29) one end, and discharge nozzle (29) other end is connected with recycling can
(30)。
8. a kind of recovery system of sour methanol-fueled exhaust recycling chloromethanes according to claim 7, it is characterised in that: the tail
Gas inlet pipe (5), absorbing liquid inlet pipe (4), air inlet pipe (11), catalyst inlet pipe (17), escape pipe (18), purification absorption tube (20),
Valve is provided on recovery tube (27), absorbing liquid inlet pipe (33) and discharge nozzle (29).
9. a kind of process of acid methanol-fueled exhaust recycling chloromethanes described in -8 according to claim 1, it is characterised in that: including
Following steps:
S1: the tail gas containing hydrogen chloride gas enters in absorption tower (7) from tail gas inlet pipe (5), and absorbing liquid inlet pipe (4) is constantly to suction
It receives and supplements methanol solution in tower (7), the hydrogen chloride gas and methanol solution in tail gas are mixed to form sour methanol solution, tail gas and first
Alcoholic solution can generate a large amount of heat when mixing, and the water of the first spiral heat exchange tube (3) internal circulation flow takes away the heat of mixing；
S2: the sour methanol solution in step S1 is extracted out and is pumped into heater box (15) by liquid pump (10), adding in heater box (15)
Hot device (12) heats sour methanol solution, obtains methanol and hydrogen chloride gas；
The methanol and hydrogen chloride gas of S3: step S2 obtained heat enter in reaction tower (13), from catalyst inlet pipe (17) to anti-
It answers and injects zinc chloride catalyst solution in tower (13), hot methanol and hydrogen chloride gas are reacted under the action of catalyst, raw
At methyl chloride gas；
S4: containing water, methanol, hydrogen chloride and chloromethanes from the gas obtained after reaction tower (13) reaction, which, which enters, divides
From in device (19), separator (19) includes catalyst for the liquid phase in mixed gas and water is separated and passes through outlet tube (21)
Discharge is flowed back into reaction tower (13) and is recycled；
S5: the mixed gas after gas-liquid separation in step S4 is chloromethanes and its a small amount of methanol and hydrogen chloride gas,
Mixed gas is entered in purifying column (26) by purification absorption tube (20), and absorbing liquid in purifying column (26) is by methanol and hydrogen chloride
Gas absorbs, and the liquid after absorption is collected, can put into absorption tower (7) and be recycled；
S6: the methyl chloride gas by purification is entered in compressor (28) by recovery tube (27), and compressor (28) is by chloromethanes
Gas compression liquefaction is liquid, and is injected into recycling can (30) and is collected by discharge nozzle (29).
10. a kind of process of sour methanol-fueled exhaust recycling chloromethanes according to claim 9, it is characterised in that: described
Gas temperature in step S2 after heater (12) heating controls the catalyst concn at 180 DEG C, in the step S3 and protects
It holds 60%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910694531.8A CN110304988A (en) | 2019-07-30 | 2019-07-30 | A kind of process and recovery system of acid methanol-fueled exhaust recycling chloromethanes |
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| CN201910694531.8A CN110304988A (en) | 2019-07-30 | 2019-07-30 | A kind of process and recovery system of acid methanol-fueled exhaust recycling chloromethanes |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111807924A (en) * | 2020-07-21 | 2020-10-23 | 安徽金轩科技有限公司 | Method for recycling galaxolide waste liquid |
Citations (1)
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| CN107141194A (en) * | 2017-05-26 | 2017-09-08 | 湖北泰盛化工有限公司 | A kind of sour methanol of Joint Production, the equipment and technique of chloromethanes |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107141194A (en) * | 2017-05-26 | 2017-09-08 | 湖北泰盛化工有限公司 | A kind of sour methanol of Joint Production, the equipment and technique of chloromethanes |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111807924A (en) * | 2020-07-21 | 2020-10-23 | 安徽金轩科技有限公司 | Method for recycling galaxolide waste liquid |
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Application publication date: 20191008 |