CN113776277A - Heat exchange method and device for methylal recovery - Google Patents
Heat exchange method and device for methylal recovery Download PDFInfo
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- CN113776277A CN113776277A CN202111086314.4A CN202111086314A CN113776277A CN 113776277 A CN113776277 A CN 113776277A CN 202111086314 A CN202111086314 A CN 202111086314A CN 113776277 A CN113776277 A CN 113776277A
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- pipe
- methylal
- precooling
- shell
- liquid
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- NKDDWNXOKDWJAK-UHFFFAOYSA-N dimethoxymethane Chemical compound COCOC NKDDWNXOKDWJAK-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000011084 recovery Methods 0.000 title claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 70
- 238000000926 separation method Methods 0.000 claims abstract description 22
- 239000000498 cooling water Substances 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 238000009833 condensation Methods 0.000 claims abstract description 12
- 230000005494 condensation Effects 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 238000004891 communication Methods 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000012459 cleaning agent Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229920000388 Polyphosphate Polymers 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000002917 insecticide Substances 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0228—Coupling of the liquefaction unit to other units or processes, so-called integrated processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0003—Condensation of vapours; Recovering volatile solvents by condensation by using heat-exchange surfaces for indirect contact between gases or vapours and the cooling medium
- B01D5/0006—Coils or serpentines
-
- 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
- B01D53/002—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 condensation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/48—Preparation of compounds having groups
- C07C41/58—Separation; Purification; Stabilisation; Use of additives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
- F25J1/0262—Details of the cold heat exchange system
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention discloses a heat exchange method and a heat exchange device for methylal recovery, belonging to the technical field of methylal recovery, wherein the device in the heat exchange method comprises a precooling assembly, a plurality of radiating fins are arranged on a precooling straight pipe of the precooling assembly, so that the contact area of the precooling straight pipe and air is greatly increased, and the radiating efficiency of the precooling straight pipe is improved; after flowing cooling water is introduced into the pre-cooling assembly, the cooling water rotationally flows under the guide effect of the spiral blades, so that the heat exchange efficiency of the cooling water and the pre-cooling coil is increased, the temperature of methylal gas entering the condensation assembly is reduced, and the scaling phenomenon on the surface of the condensation coil is reduced; the casing is carried with the liquid after the condensation of methylal gas and small part to first connecting pipe, and methylal liquid flows into first connecting pipe through leading liquid fill and U type pipe, and U type socle portion can be detained partial methylal liquid, prevents that the gaseous first liquid separation pipe of methylal that does not condense from getting into, avoids influencing the gaseous heat transfer effect of methylal.
Description
Technical Field
The invention belongs to the technical field of methylal recovery, and particularly relates to a heat exchange method and a heat exchange device for methylal recovery.
Background
The methylal is also called as dimethoxymethane, has good physical and chemical properties as a solvent, namely good solubility, low boiling point and good water solubility, can be widely applied to products such as cosmetics, medicines, household products, industrial automobile products, insecticides, leather polishing agents, cleaning agents and the like, and can replace F11, F13 and chlorine-containing solvents as the cleaning agent due to good oil stain removing capability and volatility, so that the methylal is an environment-friendly product for replacing Freon, reducing the emission of volatile organic compounds and reducing the air pollution.
In the existing methylal recovery method, a condenser is directly used for cooling recovery, most of heat exchangers are heat exchange systems taking water as a heat carrier, and certain salts are crystallized and separated from water when the temperature is raised and are attached to the surface of a heat exchange tube to form scale. The addition of polyphosphate buffers to the cooling water also results in scale precipitation when the pH of the water is high. The scale formed in the initial stage is softer, but the heat transfer condition is worsened along with the generation of the scale layer, the crystal water in the scale is gradually lost, the scale layer is hardened, and is firmly attached to the surface of the heat exchange tube, so that the heat exchange efficiency and the service life of the condenser are reduced.
Disclosure of Invention
The invention aims to provide a heat exchange method and a heat exchange device for recovering methylal, which can reduce the temperature of methylal gas introduced into a condensing assembly through a precooling assembly so as to solve the problems in the background art.
The purpose of the invention can be realized by the following technical scheme: a heat exchange method for recovering methylal comprises the following steps:
the method comprises the following steps: introducing methylal gas into the precooling assembly through a precooling straight pipe, introducing cooling water into the sealed box body through a first water inlet pipe, and discharging precooled methylal into the gas-liquid separation assembly;
step two: introducing the methylal gas separated by the gas-liquid separation component into a condensing coil of the condensing component, introducing cooling water into the transverse pipe through a second water inlet pipe, spraying the cooling water onto the condensing coil and the sleeve sheet through a spray head, and starting a fan to blow air into the condensing component;
step three: after the methylal gas in the condensation assembly is completely liquefied, a valve on the second communicating pipe is opened, so that the methylal liquid at the bottom of the U-shaped pipe is discharged through the first liquid dividing pipe;
further, the heat exchange device for recovering the methylal comprises a precooling assembly, a gas-liquid separation assembly and a condensation assembly which are connected through pipelines; the bottoms of the gas-liquid separation assembly and the condensation assembly are provided with placing racks, and the precooling assembly is arranged above the gas-liquid separation assembly;
the precooling assembly comprises a sealed box body, a first water inlet pipe is arranged at the top of the sealed box body, and a first water outlet pipe is arranged at the lower part of one side of the sealed box body; a precooling straight pipe is arranged at the upper part of one side of the sealed box body, one end of the precooling straight pipe extends into the sealed box body and is connected with a precooling coil pipe, and the other end of the precooling straight pipe is positioned outside the sealed box body and is fixedly connected with a plurality of radiating fins arranged in an array manner; one end of the downstream of the precooling coil pipe is connected with a first communicating pipe; the inner wall of the sealed box body is fixedly provided with a helical blade, and the precooling coil is arranged in the center of the helical blade;
the gas-liquid separation assembly comprises a shell, wherein a baffle is vertically arranged in the shell, and two sides of the baffle in the horizontal direction are respectively fixedly connected with two corresponding side walls of the shell; the two sides of the baffle are symmetrically provided with side plates, and a plurality of air holes are formed in the side plates in an array manner; the other end of the first communication pipe penetrates through the side wall on one side of the shell and penetrates through the side plate on the corresponding side to point to the baffle; the side wall of the other side of the shell is provided with an air outlet pipe; a liquid guide hopper is fixedly arranged in the shell and is positioned below the baffle; the bottom of the liquid guide hopper is provided with a U-shaped pipe, and the other end of the U-shaped pipe extends out of the shell and is connected with a first liquid dividing pipe; the bottom of the U-shaped pipe is connected with a second communicating pipe, one end of the second communicating pipe, far away from the bottom of the U-shaped pipe, extends out of the shell and is connected with the first liquid distribution pipe, and a valve is arranged on the second communicating pipe;
the condensation component comprises a shell, the top of the shell is provided with a second water inlet pipe, and the bottom of the shell is provided with a second water outlet pipe; one end of the second water inlet pipe extending into the outer shell is connected with a horizontal pipe which is horizontally arranged, and a plurality of spray heads are arranged on the horizontal pipe in an array manner; a condensing coil is arranged in the shell, and a plurality of sleeve sheets are arranged on the condensing coil in an array manner; one end of the condensing coil is connected with the air outlet pipe, and the other end of the condensing coil extends out of the shell and is connected with a second liquid distribution pipe; one side of the shell is provided with a mounting opening, one side of the mounting opening, which is close to the condensing coil, is provided with a screen plate, and the other side is provided with a fan; an air outlet is formed in the upper portion of the side wall of the shell, which is opposite to the mounting opening, a fixing plate is arranged at the top of the shell, and the fixing plate is located between the air outlet and the condensing coil pipe; the first liquid dividing pipe and the second liquid dividing pipe are connected to the same main liquid outlet pipe; the pre-cooling straight pipe, the pre-cooling coil pipe and the condensing coil pipe are all made of copper.
The invention has the beneficial effects that:
1. the device in the heat exchange method comprises the precooling assembly, and a plurality of radiating fins are arranged on a precooling straight pipe of the precooling assembly, so that the contact area of the precooling straight pipe and air is greatly increased, and the radiating efficiency of the precooling straight pipe is favorably improved; after flowing cooling water is introduced into the pre-cooling assembly, the cooling water flows in a rotating mode under the guiding effect of the spiral blades, the heat exchange efficiency of the cooling water and the pre-cooling coil is improved, the temperature of methylal gas entering the condensation assembly is reduced, and the scaling phenomenon on the surface of the condensation coil is reduced.
2. The device in the heat exchange method comprises a gas-liquid separation assembly, wherein a first communication pipe conveys methylal gas and a small part of condensed liquid into the shell, the gas is blown to the baffle and partially condensed when passing through the side plate, and the methylal liquid flows into the first communication pipe through the liquid guide hopper and the U-shaped pipe, so that the primarily condensed methylal liquid is conveniently collected; u type socle bottom can be detained partial methylal liquid, prevents that the gaseous first liquid separation pipe of methylal that does not condense from getting into, avoids influencing the gaseous heat transfer effect of methylal.
3. The device in the heat exchange method comprises the condensing assembly, the sleeve sheet is arranged on the outer wall of the condensing coil, the contact area between condensate water sprayed by the transverse pipe and the heat exchange coil is greatly increased, heat conduction is facilitated, the fan is used for blowing, the evaporation rate of the condensate water on the condensing coil and the sleeve sheet is increased, the heat exchange efficiency is increased, and methylal gas is convenient to condense into liquid.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of a heat exchange device of the present invention;
FIG. 2 is a schematic diagram illustrating an internal structure of a pre-cooling assembly according to the present invention;
FIG. 3 is a schematic view of the internal structure of the gas-liquid separation module according to the present invention;
FIG. 4 is a schematic view of the internal structure of the condensing assembly of the present invention;
fig. 5 is a schematic structural view of the side panel of the present invention.
In the figure: 1. a pre-cooling assembly; 2. a gas-liquid separation assembly; 3. a condensing assembly; 4. a main liquid outlet pipe; 5. placing a rack; 11. sealing the box body; 12. pre-cooling a straight pipe; 121. a heat dissipating fin; 13. a first water inlet pipe; 14. pre-cooling the coil pipe; 15. a first communication pipe; 16. a first water outlet pipe; 17. a helical blade; 21. a housing; 22. a baffle plate; 23. a side plate; 231. air holes; 24. an air outlet pipe; 25. a liquid guide hopper; 26. a U-shaped pipe; 261. a second communicating pipe; 27. a first liquid dividing pipe; 31. a housing; 32. a fan; 33. a screen plate; 34. an air outlet; 35. a second water inlet pipe; 351. a transverse tube; 352. a spray head; 36. a condenser coil; 361. sleeving sheets; 37. a second liquid dividing pipe; 38. and a second water outlet pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention is a heat exchange method for recovering methylal, comprising the following steps:
the method comprises the following steps: introducing methylal gas into the precooling assembly 1 through a precooling straight pipe 12, introducing cooling water into the sealed box body 11 through a first water inlet pipe 13, and discharging precooled methylal into the gas-liquid separation assembly 2;
step two: introducing the methylal gas separated by the gas-liquid separation component 2 into a condensing coil 36 of the condensing component 3, introducing cooling water into a transverse pipe 351 through a second water inlet pipe 35, spraying the cooling water onto the condensing coil 36 and a sleeve sheet 361 through a spray head 352, starting a fan 32, and blowing air into the condensing component 3;
step three: after the methylal gas in the condensing assembly 3 is completely liquefied, the valve on the second communicating pipe 261 is opened, so that the methylal liquid at the bottom of the U-shaped pipe 26 is discharged through the first liquid dividing pipe 27.
A heat exchange device for recovering methylal comprises a precooling assembly 1, a gas-liquid separation assembly 2 and a condensing assembly 3 which are connected through pipelines; the precooling assembly 1 comprises a sealed box body 11, a first water inlet pipe 13 is arranged at the top of the sealed box body 11, and a first water outlet pipe 16 is arranged at the lower part of one side of the sealed box body 11; the upper part of one side of the sealed box body 11 is provided with a precooling straight pipe 12, one end of the precooling straight pipe 12 extends into the sealed box body 11 and is connected with a precooling coil pipe 14, and the other end of the precooling straight pipe 12 is positioned outside the sealed box body 11 and is fixedly connected with a plurality of radiating fins 121 arranged in an array mode, so that the contact area of the precooling straight pipe 12 and air is increased, and the radiating effect is increased; one end of the downstream of the pre-cooling coil pipe 14 is connected with a first communicating pipe 15; the inner wall of the sealed box body 11 is fixedly provided with a helical blade 17, and the precooling coil 14 is arranged in the center of the helical blade 17; the helical blade 17 can make the cooling water flowing through the sealed box body 11 flow and rotate to generate a certain turbulent flow, so that the cooling water is fully contacted with the precooling coil 14, and the precooling effect is improved.
The gas-liquid separation assembly 2 comprises a shell 21, a baffle 22 is vertically arranged in the shell 21, and two sides of the baffle 22 in the horizontal direction are respectively fixedly connected with two corresponding side walls of the shell 21; the two sides of the baffle plate 22 are symmetrically provided with side plates 23, and a plurality of air holes 231 are formed in the side plates 23 in an array manner; the other end of the first communicating pipe 15 passes through the side wall of one side of the housing 21 and points to the baffle 22 through the side plate 23 of the corresponding side; part of the methylal liquid liquefied in the pre-cooling assembly 1 flows down through the first communication pipe 15, and the methylal gas blows towards the baffle 22, so that a small part of methylal can be condensed again and flows down along the side plate 23 and the baffle 22; an air outlet pipe 24 is arranged on the side wall of the other side of the shell 21, and the non-liquefied methylal gas is introduced into the condensing assembly 3; a liquid guide hopper 25 is fixedly arranged in the shell 21, and the liquid guide hopper 25 is positioned below the baffle 22; a U-shaped pipe 26 is arranged at the bottom of the liquid guide hopper 25, and the other end of the U-shaped pipe 26 extends out of the shell 21 and is connected with a first liquid dividing pipe 27; the bottom of the U-shaped pipe 26 is connected with a second communicating pipe 261, one end of the second communicating pipe 261, which is far away from the bottom of the U-shaped pipe 26, extends out of the shell 21 and is connected with the first liquid dividing pipe 27, and a valve is arranged on the second communicating pipe 261; a small amount of methylal liquid can be stored at the bottom of the U-shaped pipe 26, so that the unliquefied methylal gas is prevented from flowing out through the first liquid dividing pipe 27, and after all the methylal gas is subjected to heat exchange, the valve is opened, so that the methylal liquid at the bottom of the U-shaped pipe 26 is discharged through the second communicating pipe 261;
the condensing assembly 3 comprises a shell 31, a second water inlet pipe 35 is arranged at the top of the shell 31, and a second water outlet pipe 38 is arranged at the bottom of the shell 31; one end of the second water inlet pipe 35 extending into the outer shell 31 is connected with a horizontal pipe 351, a plurality of spray heads 352 are arranged on the horizontal pipe 351 in an array mode, and the spray heads 352 can enable cooling water to be dispersed uniformly; a condensing coil 36 is arranged in the shell 31, and a plurality of sleeve pieces 361 are arranged on the condensing coil 36 in an array manner, so that the contact area between the condensing coil 36 and the cooling liquid is increased; one end of the condensing coil 36 is connected with the air outlet pipe 24, and the other end extends out of the shell 31 and is connected with a second liquid dividing pipe 37; a mounting opening is formed in one side of the shell 31, a screen plate 33 is arranged on one side, close to the condensing coil 36, of the mounting opening, and a fan 32 is arranged on the other side of the mounting opening; an air outlet 34 is formed in the upper portion of the side wall of the shell 31 on the side opposite to the mounting opening, a fixing plate is arranged at the top of the shell 31, and the fixing plate is located between the air outlet 34 and the condensing coil 36; the fan 32 blows air to the condensing coil 36 and the sleeve sheets 361, the evaporation rate of cooling water is increased, the heat exchange efficiency is increased, redundant heat is discharged through the air outlet 34, and the fixing plate can prevent the cooling water from being directly discharged.
The bottoms of the gas-liquid separation assembly 2 and the condensation assembly 3 are provided with a placing rack 5, and the precooling assembly 1 is arranged above the gas-liquid separation assembly 2; the first liquid dividing pipe 27 and the second liquid dividing pipe 37 are both connected to the same main liquid outlet pipe 4, so that condensed methylal liquid can be conveniently discharged; precooling straight tube 12, precooling coil 14 and condensing coil 36 are all made of copper, and are corrosion-resistant and good in heat conduction effect.
The electrical components related to the invention are all in the prior art, and the specific structure and the working principle of the electrical components are not described in the specification.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A heat exchange device for recovering methylal comprises a placing rack (5), and is characterized in that a gas-liquid separation assembly (2) and a condensation assembly (3) are arranged on the placing rack (5), a precooling assembly (1) is arranged above the gas-liquid separation assembly (2), and the precooling assembly (1) comprises a sealing box body (11); the top of the sealing box body (11) is provided with a first water inlet pipe (13), the side wall of the sealing box body (11) is provided with a first water outlet pipe (16) and a precooling straight pipe (12), the precooling straight pipe (12) stretches into the sealing box body (11) and is connected with a precooling coil pipe (14), and one end, far away from the precooling straight pipe (12), of the precooling coil pipe (14) is connected with a first communication pipe (15).
2. The heat exchange device for methylal recovery as recited in claim 1, wherein the inner wall of the sealed box body (11) is fixedly provided with helical blades (17), and the pre-cooling coil (14) is arranged in the center of the helical blades (17).
3. The heat exchange device for methylal recovery as recited in claim 1, wherein the end of the precooling straight pipe (12) outside the sealed box body (11) is provided with a plurality of radiating fins (121) in an array.
4. The heat exchange device for methylal recovery according to claim 1, wherein the gas-liquid separation assembly (2) comprises a shell (21), a baffle (22) is arranged in the shell (21), side plates (23) are symmetrically arranged on two sides of the baffle (22), and a plurality of air holes (231) are formed in the side plates (23) in an array manner; an air outlet pipe (24) is arranged on the shell (21), and the first communication pipe (15) penetrates through the side wall of the shell (21) and the side plate (23) on the corresponding side and points to the baffle (22); a liquid guide hopper (25) positioned below the baffle plate (22) is arranged in the shell (21).
5. The heat exchange device for methylal recovery according to claim 4, wherein the bottom of the liquid guide hopper (25) is provided with a U-shaped pipe (26), and the U-shaped pipe (26) is connected with a first liquid dividing pipe (27); the bottom of U type pipe (26) is connected with second communicating pipe (261), and the one end that U type pipe (26) bottom was kept away from in second communicating pipe (261) is connected with first liquid distribution pipe (27), and is provided with the valve on second communicating pipe (261).
6. The heat exchange device for methylal recovery as claimed in claim 4, wherein the condensing assembly (3) comprises a shell (31), the top of the shell (31) is connected with a transverse pipe (351) through a second water inlet pipe (35), a second water outlet pipe (38) is arranged at the bottom of the shell (31), and a plurality of nozzles (352) are arranged on the transverse pipe (351) in an array manner; a condensing coil (36) is arranged in the shell (31), and a plurality of sleeve sheets (361) are arranged on the condensing coil (36) in an array manner; one end of the condensing coil (36) is connected with the air outlet pipe (24), and the other end of the condensing coil extends out of the shell (31) and is connected with a second liquid dividing pipe (37); one side of the shell (31) is provided with a mounting opening, and the other side is provided with an air outlet (34); the mounting port is provided with a screen plate (33) and a fan (32), and the top of the shell (31) is provided with a fixing plate.
7. A heat exchange device for methylal recovery according to claim 6, characterized in that the first branch pipe (27) and the second branch pipe (37) are connected with the total liquid outlet pipe (4).
8. A heat exchange method for recovering methylal is characterized by comprising the following steps:
the method comprises the following steps: introducing methylal gas into the precooling assembly (1) through a precooling straight pipe (12), introducing cooling water into the sealed box body (11) through a first water inlet pipe (13), and discharging precooled methylal into the gas-liquid separation assembly (2);
step two: introducing methylal gas separated by the gas-liquid separation component (2) into a condensing coil (36) of the condensing component (3), introducing cooling water through a second water inlet pipe (35), spraying the cooling water onto the condensing coil (36) and the sleeve pieces (361) through a spray head (352), and starting a fan (32) to blow air into the condensing component (3);
step three: after the methylal gas in the condensation component (3) is completely liquefied, a valve on the second communicating pipe (261) is opened, and the methylal liquid at the bottom of the U-shaped pipe (26) is discharged through the first liquid separating pipe (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111086314.4A CN113776277A (en) | 2021-09-16 | 2021-09-16 | Heat exchange method and device for methylal recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111086314.4A CN113776277A (en) | 2021-09-16 | 2021-09-16 | Heat exchange method and device for methylal recovery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113776277A true CN113776277A (en) | 2021-12-10 |
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| JPH02287068A (en) * | 1989-04-27 | 1990-11-27 | Hitachi Ltd | Gas extracting device |
| CN103697726A (en) * | 2013-12-23 | 2014-04-02 | 南京迪泽尔空调设备有限公司 | Shell and tube heat exchanger |
| US20170232162A1 (en) * | 2013-03-14 | 2017-08-17 | Kci Licensing, Inc. | Fluid collection canister with integrated moisture trap |
| CN207066167U (en) * | 2017-09-11 | 2018-03-02 | 安徽华丰植物香料股份有限公司 | A kind of garlic oil production heat sink |
| CN208574349U (en) * | 2018-05-31 | 2019-03-05 | 河南中烟工业有限责任公司 | A kind of compressed air condensate drain |
| CN210057799U (en) * | 2019-06-04 | 2020-02-14 | 眉山市博眉启明星铝业有限公司 | Water trap of multi-functional overhead traveling crane compressed air system |
| CN112263968A (en) * | 2020-11-06 | 2021-01-26 | 安徽省海徽化工有限公司 | Oxidation reaction device for formaldehyde production |
| CN214050515U (en) * | 2020-12-18 | 2021-08-27 | 淄博天堂山化工有限公司 | Xylene condensation recovery unit |
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2021
- 2021-09-16 CN CN202111086314.4A patent/CN113776277A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02287068A (en) * | 1989-04-27 | 1990-11-27 | Hitachi Ltd | Gas extracting device |
| US20170232162A1 (en) * | 2013-03-14 | 2017-08-17 | Kci Licensing, Inc. | Fluid collection canister with integrated moisture trap |
| CN103697726A (en) * | 2013-12-23 | 2014-04-02 | 南京迪泽尔空调设备有限公司 | Shell and tube heat exchanger |
| CN207066167U (en) * | 2017-09-11 | 2018-03-02 | 安徽华丰植物香料股份有限公司 | A kind of garlic oil production heat sink |
| CN208574349U (en) * | 2018-05-31 | 2019-03-05 | 河南中烟工业有限责任公司 | A kind of compressed air condensate drain |
| CN210057799U (en) * | 2019-06-04 | 2020-02-14 | 眉山市博眉启明星铝业有限公司 | Water trap of multi-functional overhead traveling crane compressed air system |
| CN112263968A (en) * | 2020-11-06 | 2021-01-26 | 安徽省海徽化工有限公司 | Oxidation reaction device for formaldehyde production |
| CN214050515U (en) * | 2020-12-18 | 2021-08-27 | 淄博天堂山化工有限公司 | Xylene condensation recovery unit |
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Application publication date: 20211210 |