CN111249762A - Vacuum heat-preservation continuous distillation gas-liquid separator - Google Patents
Vacuum heat-preservation continuous distillation gas-liquid separator Download PDFInfo
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- CN111249762A CN111249762A CN202010072182.9A CN202010072182A CN111249762A CN 111249762 A CN111249762 A CN 111249762A CN 202010072182 A CN202010072182 A CN 202010072182A CN 111249762 A CN111249762 A CN 111249762A
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- 239000007788 liquid Substances 0.000 title claims abstract description 146
- 238000004321 preservation Methods 0.000 title claims abstract description 24
- 238000001944 continuous distillation Methods 0.000 title claims abstract description 19
- 238000000926 separation method Methods 0.000 claims abstract description 88
- 238000009833 condensation Methods 0.000 claims abstract description 60
- 230000005494 condensation Effects 0.000 claims abstract description 60
- 238000010521 absorption reaction Methods 0.000 claims abstract description 34
- 239000002699 waste material Substances 0.000 claims abstract description 16
- 238000009413 insulation Methods 0.000 claims abstract description 7
- 230000001174 ascending effect Effects 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 5
- 239000010453 quartz Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 238000004821 distillation Methods 0.000 abstract description 28
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 23
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 16
- 238000001514 detection method Methods 0.000 description 12
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 5
- 239000010842 industrial wastewater Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 239000012459 cleaning agent Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- CVTZKFWZDBJAHE-UHFFFAOYSA-N [N].N Chemical class [N].N CVTZKFWZDBJAHE-UHFFFAOYSA-N 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4022—Concentrating samples by thermal techniques; Phase changes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4022—Concentrating samples by thermal techniques; Phase changes
- G01N2001/4033—Concentrating samples by thermal techniques; Phase changes sample concentrated on a cold spot, e.g. condensation or distillation
Abstract
The invention discloses a vacuum heat-preservation continuous distillation gas-liquid separator which comprises a vacuum heat-preservation cover and a condensation pipe, wherein a gas-liquid separation cavity and a flow guide pipe are arranged in the vacuum heat-preservation cover; one end of the flow guide pipe extends out of the vacuum heat-insulation cover and is connected to a distillation device of high-temperature steam, the other end of the flow guide pipe extends to the bottom of the gas-liquid separation cavity, the gas-liquid separation cavity is longitudinally arranged inside the vacuum heat-insulation cover, the bottom end of the gas-liquid separation cavity is connected with a waste liquid drainage pipe, and the tail end of the waste liquid drainage pipe extends out of the vacuum heat; the top end of the gas-liquid separation cavity is connected to the upper end of the condensation pipe through a gas guide pipe. The separator is carried out in a whole-course closed state, a device does not need to be opened, gas-liquid separation and absorption, reaction and outward delivery measurement of volatile components to be measured can be continuously carried out on distillates of a plurality of samples, working efficiency is effectively improved, and continuous sample introduction and gas-liquid separation are realized.
Description
Technical Field
The invention relates to the technical field of environmental detection, in particular to a device for online distillation and gas-liquid separation of low-boiling-point substances such as volatile phenol, sulfide, cyanide, ammonia nitrogen and the like.
Background
Indexes such as volatile phenol, sulfide, cyanide, ammonia nitrogen and the like are basic detection items of water environment quality standards and comprehensive discharge standards of domestic sewage and industrial wastewater. The detection of the projects has large sample amount and high working strength in the daily detection work of the environmental-friendly water quality, and a distillation device is specially set up for sample pretreatment. Most of volatile phenol, cyanide, sulfide and ammonia nitrogen compounds are toxic and harmful, and in the sample pretreatment process of environment-friendly water quality detection, because the sample is easy to escape from the device in the distillation and absorption processes, the analysis generates errors, the laboratory environment is polluted, and the body of a tester is injured, so that the air tightness of the device must be ensured constantly in the distillation process. Traditional distillation plant comprises retort and condenser pipe, and the application of sample under open state, airtight postheating distillation and condensation, but some very volatile components have the loss under open state to need wash the device and the application of sample again after the distillation of first sample is finished, can't carry out the processing of next sample in succession. The condenser pipe of traditional distillation plant makes the cooling of volatile gas component condense for a device of liquid for utilizing the heat exchange principle, and the difficult tightness of guaranteeing the device completely at the distilled in-process, the tightness is relatively poor, leads to producing analytical error, pollutes the laboratory environment, causes the injury to tester's health to traditional distillation plant can't advance appearance and continuous distillation in succession, and is consuming time, power consumption, and work efficiency is low, has increased experimenter's burden.
Disclosure of Invention
The invention aims to provide a vacuum heat-preservation continuous distillation gas-liquid separator aiming at the defects. The device is used for distilling and separating gas and liquid of low boiling point substances such as volatile phenol, sulfide, cyanide, ammonia nitrogen and the like in continuous or online analysis of water quality. The device is time-saving and labor-saving in use, is used for only 3min in the distillation process of a single sample, has the recovery rate up to 95 percent, can be used for continuous distillation and gas-liquid separation of a plurality of continuous samples at intervals by using a cleaning agent, and effectively improves the working efficiency. Because the device does not need to be disassembled between the adjacent samples, the air tightness of the device can be effectively ensured, and the problems of error generation, laboratory environment pollution and body injury of testers caused by volatilization loss are avoided. Because the device can realize continuous sample introduction and separation, the possibility is provided for the rapid and continuous detection of relevant indexes.
The technical scheme of the invention is as follows:
a vacuum heat-preservation continuous distillation gas-liquid separator comprises a vacuum heat-preservation cover and a condensation pipe, wherein a gas-liquid separation cavity and a flow guide pipe are arranged in the vacuum heat-preservation cover; one end of the flow guide pipe extends out of the vacuum heat-insulating cover and is connected to a distillation device of high-temperature steam, the other end of the flow guide pipe extends to the bottom of the gas-liquid separation cavity, the gas-liquid separation cavity is longitudinally arranged in the vacuum heat-insulating cover, the bottom end of the gas-liquid separation cavity is connected with a waste liquid drainage pipe, the tail end of the waste liquid drainage pipe extends out of the vacuum heat-insulating cover, and part of condensed liquid; the top end of the gas-liquid separation cavity is connected with the upper end of a condenser pipe through a gas guide pipe, and the lower end of the condenser pipe can be connected with a detector.
Furthermore, the vacuum heat-preservation cover is an inverted L-shaped vacuum sealing right-angle elbow, the length of the horizontal part of the right-angle elbow is 2-15cm, and the length of the vertical part of the right-angle elbow is 3-35 cm.
Further, the gas-liquid separation chamber is arranged in the vertical part of the vacuum heat-preserving cover.
Furthermore, the flow guide pipe consists of an ascending inlet section, a horizontal straight pipe section and a descending outlet section, and the three sections are connected in sequence to form an asymmetric inverted U shape; the vacuum heat-insulating cover is vertically embedded below the horizontal part of the vacuum heat-insulating cover in the ascending inlet section, one end of the ascending inlet section outside the vacuum heat-insulating cover is connected to a distillation device of high-temperature steam, and one end of the ascending inlet section in the vacuum heat-insulating cover is connected with one end of the horizontal straight pipe section; the horizontal straight pipe section is arranged in parallel at the horizontal part of the vacuum heat-insulation cover, and the other end of the horizontal straight pipe section is connected with one end of the descending outlet section; the descending outlet section is arranged in the gas-liquid separation cavity, and the tail end of the descending outlet section extends to the bottom end of the gas-liquid separation cavity.
Further, the inner diameter of the flow guide pipe is 0.3-6 mm; the length of the ascending inlet section is 0.5-10cm, the length of the horizontal straight pipe section is 1-12cm, and the length of the descending outlet section is 2-25 cm. The overlength of the ascending inlet section can cause the pipe diameter of the vacuum heat-insulating pipe to be overlarge, the structural materials are wasted, the occupied space is large, and in addition, the overlong ascending inlet section can generate a condensation backflow phenomenon due to temperature reduction and conflict with ascending steam to cause unstable flow. When the inner diameter of the flow guide pipe is too small, a small amount of condensate is easy to block a pipeline; if the inner diameter is too large, the flow rate of the vapor or the gas-liquid mixture is too slow, and the condensed liquid is likely to remain on the tube wall.
Furthermore, the opening at the tail end of the downstream outlet section of the flow guide pipe is an oblique cut, and the inclination angle of the oblique cut is 45-85 degrees. The 45-85-degree beveling design increases the opening area, can timely discharge steam and a small amount of condensed water without causing water drops to hover at the pipe opening to block a gas circuit channel, smoothly performs gas-liquid separation, and can effectively prevent condensed liquid at the bottom of the gas-liquid separation cavity from submerging an outlet of a flow guide pipe to cause the phenomenon of blockage or suck-back backflow.
Further, the inner diameter of the gas-liquid separation cavity is 1-5cm, and the length of the gas-liquid separation cavity is 3-30 cm.
Further, the gas-liquid separation cavity is in a straight pipe shape, and both ends of the straight pipe are hemispherical.
Furthermore, the condenser pipe includes condensation absorbing pipe and the condensate pipe of cover locating outside the condensation absorbing pipe, the gas-liquid separation chamber top is connected to condensation absorbing pipe upper end through the air duct, and the steam that comes out from gas-liquid separation chamber upper end and absorption liquid join down in condensation absorbing pipe, and the lower extreme of condensation absorbing pipe is connected to the detector. The condensed water flows in from the water inlet below the condensed water pipe and flows out from the water outlet above the condensed water pipe.
Furthermore, absorption liquid is added into the condensation absorption tube, and the absorption liquid is added from the top end of the condensation absorption tube. The condensed absorption liquid is injected from the top to the bottom in the condensed absorption tube, so that the volatile components from the gas-guide tube are fully condensed and absorbed.
Furthermore, the vacuum heat-insulating cover, the gas-liquid separation cavity and the flow guide pipe are all made of hard hydrophilic materials; the hard hydrophilic material is a hard material which is resistant to certain high temperature (the softening temperature is higher than the boiling point or steam temperature of a medium), easy to process and form and does not react with the medium, such as: quartz, glass, stainless steel, high molecular polymers (polytetrafluoroethylene, polyvinyl chloride), etc. Preferably, the hard hydrophilic material is a quartz tube or a glass tube. The quartz tube and the glass can resist the temperature of the distillate, are easy to process and form, do not have chemical reaction with the component to be detected, are transparent and are convenient for observing the internal state. Other temperature resistant materials such as ceramics, stainless steel, PTFE, PVC, etc. may also be used, but are either not easily machined or not easily observed for internal conditions.
The vacuum heat-preservation continuous distillation gas-liquid separator can be used for online distillation and gas-liquid separation of volatile substances in water. The volatile substances are ammonia nitrogen, sulfide, cyanide, volatile phenol, methanol, ethanol, formaldehyde, acetaldehyde, formic acid, acetic acid, acetone, amines and the like.
The invention has the beneficial effects that:
(1) the device is used for distilling and gas-liquid separating volatile phenol, sulfide, cyanide, ammonia nitrogen and other low boiling point substances in continuous or on-line water quality analysis, the separator is carried out in a whole closed state, the device does not need to be opened, the gas-liquid separation and the absorption, reaction and outward delivery measurement of volatile components to be measured can be continuously carried out on the distillate of a plurality of samples, and the working efficiency is effectively improved. The continuous sample introduction and gas-liquid separation are realized, the efficiency of sample pretreatment is greatly improved, the distillation and separation process of a single sample generally only needs 3min, the recovery rate of volatile components in the single sample is up to 95 percent, and the possibility is provided for the rapid online or continuous detection of related indexes.
(2) The vacuum heat-insulating cover in the device greatly reduces the heat dissipation of the flow guide pipe, avoids the problems that steam is condensed and blocked at the ascending inlet section and the horizontal straight pipe section of the flow guide pipe, so that volatile components cannot reach the condensation absorption pipe through the gas-liquid separation cavity and the gas guide pipe due to condensation and are absorbed and detected, and effectively avoids the problems that the flow speed is unstable due to the occurrence of condensation liquid in the flow guide pipe, and the concentration of the volatile components detected by an external detector fluctuates greatly. The device has simple structure and is sealed in the whole process, and the errors caused by the escape loss of volatile gas components and the damage to the body of a tester are avoided.
(3) The gas-liquid separation cavity is arranged in the vacuum heat-preservation cover, so that the gas-liquid separation cavity is ensured to maintain higher temperature, gas parts, namely volatile components in a gas-liquid mixture flowing out of the flow guide pipe can smoothly flow out of the gas guide pipe at the top of the gas-liquid separation cavity, and loss and analysis errors caused by the fact that the volatile components are condensed in the flow guide pipe and flow out of a waste liquid drainage pipe at the lower part are avoided.
(4) The large-inclined cut design of the downstream outlet section of the guide pipe of the device increases the outlet area, can discharge gas or the mixture of the gas and condensate in time, effectively avoids liquid drops from suspending at the pipe orifice to block a gas path channel, further enables the water and the gas to be separated in time, and can effectively prevent condensed liquid from sealing the pipe orifice and even suck back.
(5) The vapor (volatile components) at the top end of the gas-liquid separation cavity of the device enter the condensation absorption tube through the gas guide tube, are mixed with the absorption liquid and the reaction liquid injected from top to bottom, and enter the external detection device for detection after the volatile components are absorbed, so that the separation and the detection of the volatile components and the nonvolatile components are realized. The external heating distillation device (continuous flow distillation device) is used for sequentially heating a distillation sample and a cleaning agent, when the sample is distilled, volatile components (components which are not condensed in a gas-liquid separation cavity of the device) enter a condensation absorption tube through a gas guide tube and are detected by a post-connected external detection device, when the cleaning agent is distilled, no volatile component reaches the condensation absorption tube, and a blank signal is detected by a detector, so that the gas-liquid separation of a plurality of sample distillates and the continuous detection of the volatile components are realized.
Drawings
FIG. 1 shows a schematic diagram of the vacuum insulated continuous distillation gas-liquid separator according to the present invention.
Fig. 2 shows a schematic structural view of the flow guide tube of the present invention.
In the figure, the device comprises a vacuum heat-preservation cover 1, a gas-liquid separation cavity 2, a flow guide pipe 3-1, an ascending inlet section 3-2, a horizontal straight pipe section 3-3, a descending outlet section 4, a gas guide pipe 5, a condensation absorption pipe 6, a waste liquid drainage pipe 7 and a condensation pipe.
Detailed Description
Example 1
As shown in fig. 1, the device comprises a vacuum heat-insulating cover 1 and a condensation pipe 7, wherein a gas-liquid separation cavity 2 and a flow guide pipe 3 are arranged in the vacuum heat-insulating cover 1; one end of the flow guide pipe 3 extends out of the vacuum heat-insulating cover 1 and is connected to a distillation device of high-temperature steam, the other end of the flow guide pipe extends to the bottom of the gas-liquid separation cavity 2, the gas-liquid separation cavity 2 is longitudinally arranged inside the vacuum heat-insulating cover 1, the bottom end of the gas-liquid separation cavity 2 is connected with a waste liquid drainage pipe 6, the tail end of the waste liquid drainage pipe 6 extends out of the vacuum heat-insulating cover 1, and part of condensed liquid flows out; the top end of the gas-liquid separation cavity 2 is connected to the upper end of a condensation pipe 7 through a gas guide pipe 4, and the lower end of the condensation pipe 7 is connected to a detector. The vacuum heat-insulating cover 1 is an inverted L-shaped vacuum sealing right-angle elbow, the length of the horizontal part of the right-angle elbow is 7.5cm, and the length of the vertical part of the right-angle elbow is 12 cm. The gas-liquid separation cavity 2 is arranged in the vertical part of the vacuum heat-insulating cover 1.
The inner diameter of the gas-liquid separation cavity 2 is 5cm, and the length of the gas-liquid separation cavity is 30 cm. The gas-liquid separation cavity 2 is in a straight pipe shape, and both ends of the straight pipe are hemispherical. Condenser pipe 7 includes condensation absorbing tube 5 and the condenser pipe of cover outside condensation absorbing tube 5 is located, 2 tops in gas-liquid separation chamber are connected to 5 upper ends of condensation absorbing tube through air duct 4, and the steam that comes out from gas-liquid separation chamber upper end joins down with the absorption liquid in condensation absorbing tube, and the lower extreme of condensation absorbing tube 5 is connected to the detector.
As shown in fig. 2, the draft tube 3 is composed of an ascending inlet section 3-1, a horizontal straight tube section 3-2 and a descending outlet section 3-3, and the three sections are connected in sequence to form an asymmetric inverted U shape; the ascending inlet section 3-1 is vertically embedded into the vacuum heat-insulating cover 1 from the lower part of the horizontal part of the vacuum heat-insulating cover 1, one end of the ascending inlet section 3-1 outside the vacuum heat-insulating cover 1 is connected to a distillation device of high-temperature steam, and one end of the ascending inlet section 3-1 in the vacuum heat-insulating cover 1 is connected with one end of the horizontal straight pipe section 3-2; the horizontal straight pipe section 3-2 is arranged in parallel at the horizontal part of the vacuum heat-insulating cover 1, and the other end of the horizontal straight pipe section 3-2 is connected with one end of the downstream outlet section 3-3; the descending outlet section 3-3 is arranged in the gas-liquid separation cavity 2, and the tail end of the descending outlet section 3-3 extends to the bottom end of the gas-liquid separation cavity 2. The inner diameter of the draft tube 3 is 5 mm; the length of the ascending inlet section 3-1 is 3cm, the length of the horizontal straight pipe section 3-2 is 6cm, and the length of the descending outlet section 3-3 is 6 cm. The tail end opening of the downstream outlet section 3-3 of the draft tube 3 is an oblique cut, and the inclination angle of the oblique cut is 60 degrees.
The vacuum heat-preserving cover 1, the gas-liquid separation cavity 2 and the flow guide pipe 3 are all made of quartz.
Adding absorption liquid into the condensation absorption tube 5, adding the absorption liquid from the top end of the condensation absorption tube 5, and applying the separator to online distillation and gas-liquid separation of volatile phenol in industrial wastewater, wherein the process is as follows:
heating an industrial wastewater sample containing volatile phenol in an external heating distillation device (with the temperature controlled at 160 ℃) to form steam, wherein the steam enters a separator through an upstream inlet section 3-1 of a guide pipe 3, is horizontally transmitted through a horizontal straight pipe section 3-2, is partially condensed at a downstream outlet section 3-3, and is gathered and flows into the bottom of a gas-liquid separation cavity 2, flows out of a waste liquid drainage pipe 6 and enters a waste liquid collection device; the noncondensable gas gets into gas-liquid separation chamber 2 from descending export section 3-3 to flow into condensation absorbing tube 5 from gas duct 4 at gas-liquid separation chamber 2 top, under the condensation of condenser pipe 7, the noncondensable gas is absorbed by the condensation absorbing liquid in condensation absorbing tube 5 and flows out along with the condensation absorbing liquid, gets into external detector. The total amount of distilled sample was 3mL, the time taken for distillation and separation process was 3min, and the recovery rate was 95%.
Example 2
As shown in fig. 1, the device comprises a vacuum heat-insulating cover 1 and a condensation pipe 7, wherein a gas-liquid separation cavity 2 and a flow guide pipe 3 are arranged in the vacuum heat-insulating cover 1; one end of the flow guide pipe 3 extends out of the vacuum heat-insulating cover 1 and is connected to a distillation device of high-temperature steam, the other end of the flow guide pipe extends to the bottom of the gas-liquid separation cavity 2, the gas-liquid separation cavity 2 is longitudinally arranged inside the vacuum heat-insulating cover 1, the bottom end of the gas-liquid separation cavity 2 is connected with a waste liquid drainage pipe 6, the tail end of the waste liquid drainage pipe 6 extends out of the vacuum heat-insulating cover 1, and part of condensed liquid flows out; the top end of the gas-liquid separation cavity 2 is connected to the upper end of a condensation pipe 7 through a gas guide pipe 4, and the lower end of the condensation pipe 7 is connected to a detector. The vacuum heat-insulating cover 1 is an inverted L-shaped vacuum sealing right-angle elbow, the length of the horizontal part of the right-angle elbow is 10cm, and the length of the vertical part of the right-angle elbow is 20 cm. The gas-liquid separation cavity 2 is arranged in the vertical part of the vacuum heat-insulating cover 1.
The inner diameter of the gas-liquid separation cavity 2 is 2.5cm, and the length is 16 cm. The gas-liquid separation cavity 2 is in a straight pipe shape, and both ends of the straight pipe are hemispherical. Condenser pipe 7 includes condensation absorbing tube 5 and the condenser pipe of cover outside condensation absorbing tube 5 is located, 2 tops in gas-liquid separation chamber are connected to 5 upper ends of condensation absorbing tube through air duct 4, and the steam that comes out from gas-liquid separation chamber upper end joins down with the absorption liquid in condensation absorbing tube, and the lower extreme of condensation absorbing tube 5 is connected to the detector.
As shown in fig. 2, the draft tube 3 is composed of an ascending inlet section 3-1, a horizontal straight tube section 3-2 and a descending outlet section 3-3, and the three sections are connected in sequence to form an asymmetric inverted U shape; the ascending inlet section 3-1 is vertically embedded into the vacuum heat-insulating cover 1 from the lower part of the horizontal part of the vacuum heat-insulating cover 1, one end of the ascending inlet section 3-1 outside the vacuum heat-insulating cover 1 is connected to a distillation device of high-temperature steam, and one end of the ascending inlet section 3-1 in the vacuum heat-insulating cover 1 is connected with one end of the horizontal straight pipe section 3-2; the horizontal straight pipe section 3-2 is arranged in parallel at the horizontal part of the vacuum heat-insulating cover 1, and the other end of the horizontal straight pipe section 3-2 is connected with one end of the downstream outlet section 3-3; the descending outlet section 3-3 is arranged in the gas-liquid separation cavity 2, and the tail end of the descending outlet section 3-3 extends to the bottom end of the gas-liquid separation cavity 2. The inner diameter of the draft tube 3 is 2 mm; the length of the ascending inlet section 3-1 is 3cm, the length of the horizontal straight pipe section 3-2 is 10cm, and the length of the descending outlet section 3-3 is 15 cm. The tail end opening of the downstream outlet section 3-3 of the draft tube 3 is an oblique cut, and the inclination angle of the oblique cut is 75 degrees.
The vacuum heat-insulating cover 1, the gas-liquid separation cavity 2 and the flow guide pipe 3 are all made of glass.
The absorption liquid is added into the condensation absorption pipe 5, the absorption liquid is added from the top end of the condensation absorption pipe 5, the separator is used for on-line distillation and gas-liquid separation of cyanide in industrial wastewater, and the process is as follows:
heating industrial wastewater samples containing cyanide in an external heating distillation device (temperature is controlled at 140 ℃) to form steam, wherein the steam enters a separator through an upstream inlet section 3-1 of a guide pipe 3, is horizontally transmitted through a horizontal straight pipe section 3-2, is partially condensed at a downstream outlet section 3-3, and is gathered and flows into the bottom of a gas-liquid separation cavity 2, flows out of a waste liquid drainage pipe 6 and enters a waste liquid collection device; the noncondensable gas gets into gas-liquid separation chamber 2 from descending export section 3-3 to flow into condensation absorbing tube 5 from gas duct 4 at gas-liquid separation chamber 2 top, under the condensation of condenser pipe 7, the noncondensable gas is absorbed by the condensation absorbing liquid in condensation absorbing tube 5 and flows out along with the condensation absorbing liquid, gets into external detector. The total amount of distilled sample was 5mL, the time taken for distillation and separation process was 3min, and the recovery rate was 96%.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed.
Claims (10)
1. The vacuum heat-preservation continuous distillation gas-liquid separator is characterized by comprising a vacuum heat-preservation cover (1) and a condensation pipe (7), wherein a gas-liquid separation cavity (2) and a flow guide pipe (3) are arranged in the vacuum heat-preservation cover (1); the gas-liquid separation cavity (2) is longitudinally arranged inside the vacuum heat-preservation cover (1), one end of the flow guide pipe (3) extends out of the vacuum heat-preservation cover (1), the other end of the flow guide pipe extends to the bottom of the gas-liquid separation cavity (2), the bottom end of the gas-liquid separation cavity (2) is connected with a waste liquid drainage pipe (6), and the tail end of the waste liquid drainage pipe (6) extends out of the vacuum heat-preservation cover (1); the top end of the gas-liquid separation cavity (2) is connected with the upper end of a condensation pipe (7) through a gas guide pipe (4).
2. The vacuum insulation continuous distillation gas-liquid separator according to claim 1, wherein the vacuum insulation cover (1) is an inverted L-shaped vacuum sealing right-angle elbow, the length of the horizontal part of the right-angle elbow is 2-15cm, and the length of the vertical part of the right-angle elbow is 3-35 cm.
3. The vacuum insulated continuous distillation gas-liquid separator according to claim 2, wherein the gas-liquid separation chamber (2) is disposed inside a vertical portion of the vacuum insulated hood (1).
4. The vacuum heat-preservation continuous distillation gas-liquid separator as claimed in claim 2, wherein the draft tube (3) is composed of an ascending inlet section (3-1), a horizontal straight tube section (3-2) and a descending outlet section (3-3), and the three sections are connected in sequence to form an asymmetric inverted U shape; the vacuum heat-insulating cover (1) is vertically embedded into the ascending inlet section (3-1) from the lower part of the horizontal part of the vacuum heat-insulating cover (1), and one end of the ascending inlet section (3-1) in the vacuum heat-insulating cover (1) is connected with one end of the horizontal straight pipe section (3-2); the horizontal straight pipe section (3-2) is arranged in parallel at the horizontal part of the vacuum heat-insulating cover (1), and the other end of the horizontal straight pipe section (3-2) is connected with one end of the downward outlet section (3-3); the downstream outlet section (3-3) is arranged in the gas-liquid separation cavity (2), and the tail end of the downstream outlet section (3-3) extends to the bottom end of the gas-liquid separation cavity (2).
5. The vacuum insulation continuous distillation gas-liquid separator according to claim 4, wherein the inner diameter of the draft tube (3) is 0.3-6 mm; the length of the ascending inlet section (3-1) is 0.5-10cm, the length of the horizontal straight pipe section (3-2) is 1-12cm, and the length of the descending outlet section (3-3) is 2-25 cm.
6. The vacuum insulated continuous distillation gas-liquid separator according to claim 4, wherein the end opening of the descending outlet section (3-3) of the draft tube (3) is a chamfered opening having an inclination angle of 45-85 °.
7. The vacuum heat-preservation continuous distillation gas-liquid separator as claimed in claim 1, wherein the gas-liquid separation chamber (2) has an inner diameter of 1-5cm and a length of 3-30 cm; the gas-liquid separation cavity (2) is in a straight pipe shape, and both ends of the straight pipe are hemispherical.
8. The vacuum heat-preservation continuous distillation gas-liquid separator according to claim 1, wherein the condensation pipe (7) comprises a condensation absorption pipe (5) and a condensation water pipe sleeved outside the condensation absorption pipe (5), the top end of the gas-liquid separation cavity (2) is connected to the upper end of the condensation absorption pipe (5) through a gas guide pipe (4), and the lower end of the condensation absorption pipe (5) is connected to the detector.
9. The vacuum thermal insulation continuous distillation gas-liquid separator according to claim 8, wherein the absorption liquid is added into the condensation absorption pipe (5), and the absorption liquid is added from the top end of the condensation absorption pipe (5).
10. The vacuum heat-preservation continuous distillation gas-liquid separator according to claim 1, wherein the vacuum heat-preservation cover (1), the gas-liquid separation cavity (2) and the draft tube (3) are all made of hard hydrophilic materials; the hard hydrophilic material is a quartz tube or a glass tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010072182.9A CN111249762A (en) | 2020-01-21 | 2020-01-21 | Vacuum heat-preservation continuous distillation gas-liquid separator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010072182.9A CN111249762A (en) | 2020-01-21 | 2020-01-21 | Vacuum heat-preservation continuous distillation gas-liquid separator |
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| Publication Number | Publication Date |
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| CN111249762A true CN111249762A (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010072182.9A Pending CN111249762A (en) | 2020-01-21 | 2020-01-21 | Vacuum heat-preservation continuous distillation gas-liquid separator |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202355861U (en) * | 2011-11-25 | 2012-08-01 | 北京瑞升特科技有限公司 | Device for cooling distilled gas and collecting distillates |
| CN205145679U (en) * | 2015-11-13 | 2016-04-13 | 中国石油化工股份有限公司 | Oil gas water three -phase separation bottle |
-
2020
- 2020-01-21 CN CN202010072182.9A patent/CN111249762A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202355861U (en) * | 2011-11-25 | 2012-08-01 | 北京瑞升特科技有限公司 | Device for cooling distilled gas and collecting distillates |
| CN205145679U (en) * | 2015-11-13 | 2016-04-13 | 中国石油化工股份有限公司 | Oil gas water three -phase separation bottle |
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