CN113893639A - Tail gas recovery device for reboiler rectification column of triethylene glycol dehydration device - Google Patents
Tail gas recovery device for reboiler rectification column of triethylene glycol dehydration device Download PDFInfo
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- CN113893639A CN113893639A CN202111036657.XA CN202111036657A CN113893639A CN 113893639 A CN113893639 A CN 113893639A CN 202111036657 A CN202111036657 A CN 202111036657A CN 113893639 A CN113893639 A CN 113893639A
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- triethylene glycol
- reboiler
- tail gas
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- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 230000018044 dehydration Effects 0.000 title claims abstract description 28
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 28
- 238000011084 recovery Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- 230000006835 compression Effects 0.000 claims abstract description 35
- 238000007906 compression Methods 0.000 claims abstract description 35
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 52
- 239000007788 liquid Substances 0.000 claims description 22
- 238000009826 distribution Methods 0.000 claims description 12
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 11
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 8
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 52
- 208000005156 Dehydration Diseases 0.000 abstract description 22
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 20
- 239000003345 natural gas Substances 0.000 abstract description 10
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 10
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 6
- 229930195733 hydrocarbon Natural products 0.000 description 6
- 150000002430 hydrocarbons Chemical class 0.000 description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Images
Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- 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
- B01D53/26—Drying gases or vapours
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/106—Removal of contaminants of water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/202—Alcohols or their derivatives
Abstract
The invention provides a tail gas recovery device for a reboiler rectification column of a triethylene glycol dehydration device, which relates to the technical field of triethylene glycol dehydration treatment and comprises an air cooler, a water diversion tank, a water jet supercharging device and a compression tank, wherein the output end of the air cooler is communicated with the water diversion tank through a pipeline, the bottom of the water diversion tank is communicated with the input end of the compression tank through a pipeline, and the water jet supercharging device is arranged on the pipeline between the water diversion tank and the compression tank; moreover, the energy is saved, the emission is reduced, the condition that a large amount of natural gas is consumed for combustion in the conventional incinerator is changed, and the operation cost is reduced.
Description
Technical Field
The invention relates to the technical field of triethylene glycol dehydration treatment, in particular to a tail gas recovery device of a reboiler rectification column of a triethylene glycol dehydration device.
Background
The triethylene glycol dehydration device is a main device for natural gas treatment, is used for removing gaseous water in natural gas, prevents water vapor from being separated out of the natural gas to form liquid water possibly caused by environmental temperature change in the conveying process of the natural gas, and reduces the corrosion of a pipeline and the gas transmission efficiency of the pipeline due to the liquid water generated by temperature reduction; solid ice can cause blockage of valves and pipelines and influence stable gas transmission;
in the operation process of the triethylene glycol dehydration device, a certain amount of tail gas can be generated due to the process characteristics, and the main generation reasons are as follows:
1) when a reboiler of a triethylene glycol dehydration device is used for heating and regenerating triethylene glycol, the control temperature is 200 ℃, the triethylene glycol cracking temperature is 206.7 ℃, the working temperature of the triethylene glycol is very close to the cracking temperature, so that some ethylene glycol can be decomposed inevitably, particularly some solid crystals exist in old and old triethylene glycol fire tubes, the fire tubes are locally overheated, the ethylene glycol is seriously decomposed, and the formed decomposition product has a strong acid odor taste; some gas well gas components contain more heavy hydrocarbons, which are easily dissolved in glycol, and are heated and vaporized in a reboiler together with glycol and discharged into the atmosphere, so that a great oil odor is also generated.
2) Triethylene glycol mostly takes a kimray pump as power, the kimray pump is a gas/liquid power pump driven by pressure, in the operation process of the device, high-pressure gas of an absorption tower is changed into low-pressure gas to enter a regeneration system along with the ethylene glycol after being powered, although most of gas is removed through a flash tank, some gas enters a reboiler along with the ethylene glycol (theoretically, 8L of sulfur-free natural gas can be dissolved in each liter of ethylene glycol under 6.8 MPa), after the ethylene glycol is heated, the content of dissolved gas is reduced, and the gas is separated out from the ethylene glycol and is discharged into the atmosphere along with water vapor.
3) The glycol can continuously adsorb some liquid hydrocarbons in the circulating process, the hydrocarbon components are related to the components of station gas, and some heavy hydrocarbons, especially aromatic hydrocarbons, have high solubility in the glycol and are adsorbed by the glycol in the dehydration process in the tower. During regeneration, the heavy hydrocarbon is heated to become gas which is discharged into the atmosphere along with water vapor, so that the environment and safety hazards are polluted, and the atmospheric environment is polluted and the lives of station workers and surrounding people are influenced.
4) Part of gas station gas contains a trace amount of benzene, xylene, hydrogen sulfide and other toxic and harmful substances, and is discharged into the atmosphere along with water vapor at the top of the rectification column.
In view of the above reasons, it is particularly important for the treatment of tail gas, however, the traditional treatment method of tail gas of the rectifying column of the reboiler of the triethylene glycol dehydration device is an incineration method, i.e. an incinerator is additionally built, the tail gas generated at the top of the rectifying column is introduced into the incinerator for incineration, and the tail gas is oxidized and reduced into CO2 and H2O; however, the tail gas quantity of a triethylene glycol dehydration device with the treatment capacity of 50 ten thousand square/day is only about 1-3m3/h, and a large incinerator is built for the reason that the size is too large, the investment is too high, and the consumption of the self-used gas is too large, because the tail gas discharged by a rectification column is influenced by the incoming gas quantity of triethylene glycol equipment, the water content of the gas and the temperature control of a reboiler, the tail gas quantity is changed, is suddenly large, suddenly small and discontinuous, and the flow and the pressure cannot be controlled; if the recovered gas is used as a single gas source, when the flow rate of the natural gas recovered from the tail gas is very low, the flow rate of the gas is less than the flame speed, and tempering is caused, so that in order to ensure the incineration effect, the incinerator needs to always maintain the maximum treatment combustion amount, a large amount of self-gas is needed, the partially combusted natural gas is incinerated in vain, and heat and energy are completely wasted; and the combustion system is too complex to control and has high failure rate. If the tail gas contains a large amount of heavy hydrocarbon, the tail gas is dangerous when directly entering the incinerator, and on the basis, the invention designs the tail gas recovery device of the reboiler rectification column of the triethylene glycol dehydration device so as to solve the problems.
Disclosure of Invention
The invention aims to provide a tail gas recovery device of a reboiler rectification column of a triethylene glycol dehydration device, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: triethylene glycol dewatering device reboiler rectification column tail gas recovery device, including air cooler, distributive tank, water jet supercharging device and compression jar, through the pipeline intercommunication between the output of air cooler and the distributive tank, the bottom of distributive tank passes through the pipeline intercommunication with the input of compression jar, water jet supercharging device installs on the pipeline between distributive tank and compression jar, water jet supercharging device includes Y type filter, first-class gauge, electromagnetic switch valve and ejector, and Y type filter, first-class gauge, electromagnetic switch valve and ejector concatenate along the pipeline direction of distributive tank to compression jar in proper order, the upper end of distributive tank still is connected with rich glycol discharging pipe, the below of compression jar is equipped with rich glycol inlet pipe.
Preferably, the bottom of the compression tank is provided with a liquid discharge pipe, the liquid discharge pipe is provided with a second flowmeter and a first centrifugal pump, and the first centrifugal pump is communicated with the ejector through a pipeline.
Preferably, the liquid discharge pipe is further provided with a branch pipe, the branch pipe is connected with a second centrifugal pump in series, and the tail end of the branch pipe is provided with a pneumatic switch valve.
Preferably, an emergency emptying bypass is arranged at an inlet pipeline of the air cooler, and a second pneumatic switch valve is arranged on the emergency emptying bypass.
Preferably, manometer, pressure transmitter, thermometer, temperature transmitter and two platinum resistance are all installed to the jar that divides water and the compression jar, still be equipped with the level gauge on the jar that divides water, still be equipped with level transmitter on the compression jar.
Preferably, the top of compression jar still is equipped with the blast pipe, be equipped with the flame arrester on the blast pipe, the end of blast pipe is equipped with the third pneumatic switch valve.
Compared with the prior art, the invention has the beneficial effects that:
(1) the device creatively introduces the water jet flow supercharging device, can perfectly pressurize the tail gas to the original triethylene glycol dehydration device combustor for combustion, solves the problems of small tail gas amount, large fluctuation and incapability of supercharging, particularly saves a large amount of manufacturing cost compared with the original incineration process without additionally providing a new set of incineration equipment; the method has the advantages that the method is more energy-saving and emission-reducing, changes the condition that a large amount of natural gas is consumed in the combustion of the conventional incinerator, reduces the operation cost, absorbs latent heat of vaporization in the triethylene glycol waste gas by rich ethylene glycol needing to be heated in the original triethylene glycol dehydration device, provides the non-condensable gas flashed out for a burner of the original triethylene glycol dehydration device to serve as fuel, and also greatly reduces the gas consumption of the regeneration device of the original triethylene glycol dehydration device. The waste gas is recycled, and the cleaning energy is saved;
(2) the device enables the reboiler of the original triethylene glycol dehydration device to operate under negative pressure for a long time, reduces the surface water vapor partial pressure of the ethylene glycol, further increases the concentration of the regenerated lean ethylene glycol, thereby reducing the dew point of natural gas by 3-5 ℃, and improving the dehydration effect of the original device;
(3) the device can run in a full-automatic way, does not need manual intervention, realizes unattended operation, and does not emit any peculiar smell on site after production operation, thereby achieving the purpose of environmental protection; the device can be integrated in a container, the heat dissipation of the process equipment and the process pipeline in winter achieves the self-constant temperature effect, no additional heating equipment is needed, the investment is low, and the equipment is safe and reliable.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used for describing the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 is a schematic diagram of the working principle of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1-an air cooler, 2-a water knockout drum, 3-a water jet pressurizer, 301-a Y-type filter, 302-a first flowmeter, 303-an electromagnetic switch valve, 304-a jet ejector, 4-a compression tank, 5-a glycol-rich discharge pipe, 6-a glycol-rich feed pipe, 7-a discharge pipe, 8-a second flowmeter, 9-a first centrifugal pump, 10-a branch pipe, 11-a second centrifugal pump, 12-a pneumatic switch valve, 13-an emergency vent bypass, 14-a second pneumatic switch valve, 15-a pressure gauge, 16-a pressure transmitter, 17-a thermometer, 18-a temperature transmitter, 19-a double-branch platinum thermistor, 20-a liquid level meter, 21-a liquid level transmitter, 22-an exhaust pipe, 23-a flame arrester, 24-third pneumatic on-off valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all 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, the present invention provides a technical solution: the tail gas recovery device for the rectifying column of the reboiler of the triethylene glycol dehydration device comprises an air cooler 1, a water distribution tank 2, a water jet supercharging device 3 and a compression tank 4, wherein the output end of the air cooler 1 is communicated with the water distribution tank 2 through a pipeline, the bottom of the water distribution tank 2 is communicated with the input end of the compression tank 4 through a pipeline, the water jet supercharging device 3 is installed on the pipeline between the water distribution tank 2 and the compression tank 4, the water jet supercharging device 3 comprises a Y-shaped filter 301, a first flow meter 302, an electromagnetic switch valve 303 and a jet device 304, the Y-shaped filter 301, the first flow meter 302, the electromagnetic switch valve 303 and the jet device 304 are sequentially connected in series along the pipeline direction from the water distribution tank 2 to the compression tank 4, the upper end of the water distribution tank 2 is further connected with a glycerol-rich alcohol discharge pipe 5, and a glycerol-rich feed pipe 6 is arranged below the compression tank 4.
Wherein, the bottom of the compression tank 4 is provided with a liquid discharge pipe 7, the liquid discharge pipe 7 is provided with a second flowmeter 8 and a first centrifugal pump 9, and the first centrifugal pump 9 is communicated with the ejector 304 through a pipeline.
The liquid discharge pipe 7 is further provided with a branch pipe 10, a second centrifugal pump 11 is connected to the branch pipe 10 in series, and a pneumatic switch valve 12 is installed at the tail end of the branch pipe 10.
Wherein, the inlet pipeline department of air cooler 1 is equipped with urgent unloading bypass 13, is equipped with second pneumatic switch valve 14 on the urgent unloading bypass 13, when guaranteeing equipment trouble, opens automatically, and protection reboiler system pressure is not superpressure.
Wherein, the water distribution tank 2 and the compression tank 4 are respectively provided with a pressure gauge 15, a pressure transmitter 16, a thermometer 17, a temperature transmitter 18 and a double platinum thermal resistor 19, the water distribution tank 2 is also provided with a liquid level meter 20, and the compression tank 4 is also provided with a liquid level transmitter 21.
Wherein, the top of compression jar 4 still is equipped with blast pipe 22, is equipped with spark arrester 23 on the blast pipe 22, and the end of blast pipe 22 is equipped with third pneumatic ooff valve 24.
One specific application of this embodiment is: the control system of the device adopts a mature and reliable 'ground-based' control idea of the triethylene glycol dehydration device, adopts mature products of KIMRAY and FISER companies, and reduces investment as much as possible on the premise of safe operation; a PLC program control cabinet is used as a control center of the system, so that the centralized monitoring control of the system is realized by an upper computer in a remote way;
when in use, the device cools the mixed gas discharged from the exhaust port at the top of the rectifying column to 40 ℃ by an air cooler, and then introduces the liquefied liquid and the non-condensable gas into the water separation tank; along with the operation of the device, the water level and the pressure in the water distribution tank are higher and higher, when the pressure is higher than a set value (+5KPa), negative pressure is formed at the outlet of a nozzle through the nozzle of a water ejector in the water jet supercharging device, condensed water and gas in the water distribution tank are sucked, and the sucked condensed water, tail gas and original circulating water are supercharged together and then enter a compression tank; then gas-liquid separation is realized under the action of gravity and the filling material in the tank, the gas on the top of the tank enters a tail gas nozzle of a burner of the original equipment of the triethylene glycol dehydration device for burning at a certain pressure from an exhaust pipe, and the sucked condensed water is used as circulating water to continuously suck the condensed water and the gas in the water diversion tank; and when the pressure in the water diversion tank is reduced to a set value (-15KPa), closing the tail gas outlet valve of the compression tank, stopping the operation of the device, and repeating the process after the pressure of the water diversion tank is increased to the set value.
What needs to be supplemented is: the liquid level transmitter of the compression tank is interlocked with a pneumatic valve of a sewage discharge pipeline at the outlet of the circulating water pump to control the liquid level of the circulating water in the compression tank, and sewage discharged from a high liquid level is discharged to a prepared sewage discharge barrel.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Rather, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. Triethylene glycol dewatering device reboiler rectifying column tail gas recovery unit, its characterized in that: including air cooler (1), water diversion tank (2), water jet supercharging device (3) and compression jar (4), through the pipeline intercommunication between the output of air cooler (1) and water diversion tank (2), the bottom of water diversion tank (2) passes through the pipeline intercommunication with the input of compression jar (4), water jet supercharging device (3) are installed on the pipeline between water diversion tank (2) and compression jar (4), water jet supercharging device (3) include Y type filter (301), first flowmeter (302), electromagnetic switch valve (303) and ejector (304), and Y type filter (301), first flowmeter (302), electromagnetic switch valve (303) and ejector (304) concatenate along the pipeline direction of water diversion tank (2) to compression jar (4) in proper order, the upper end of water diversion tank (2) still is connected with rich glycol discharging pipe (5), a glycol-rich feeding pipe (6) is arranged below the compression tank (4).
2. The triethylene glycol dehydration plant reboiler rectification column tail gas recovery device according to claim 1, wherein: the bottom of the compression tank (4) is provided with a liquid discharge pipe (7), the liquid discharge pipe (7) is provided with a second flowmeter (8) and a first centrifugal pump (9), and the first centrifugal pump (9) is communicated with the ejector (304) through a pipeline.
3. The triethylene glycol dehydration unit reboiler rectification column tail gas recovery device according to claim 2, characterized in that: the liquid discharge pipe (7) is further provided with a branch pipe (10), a second centrifugal pump (11) is connected to the branch pipe (10) in series, and a pneumatic switch valve (12) is installed at the tail end of the branch pipe (10).
4. The triethylene glycol dehydration plant reboiler rectification column tail gas recovery device according to claim 1, wherein: an emergency emptying bypass (13) is arranged at an inlet pipeline of the air cooler (1), and a second pneumatic switch valve (14) is arranged on the emergency emptying bypass (13).
5. The triethylene glycol dehydration plant reboiler rectification column tail gas recovery device according to claim 1, wherein: all install manometer (15), pressure transmitter (16), thermometer (17), temperature transmitter (18) and two platinum resistance (19) on water distribution tank (2) and compression jar (4), still be equipped with level gauge (20) on water distribution tank (2), still be equipped with level transmitter (21) on compression jar (4).
6. The triethylene glycol dehydration plant reboiler rectification column tail gas recovery device according to claim 1, wherein: the top of compression jar (4) still is equipped with blast pipe (22), be equipped with spark arrester (23) on blast pipe (22), the end of blast pipe (22) is equipped with third pneumatic switch valve (24).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111036657.XA CN113893639A (en) | 2021-09-07 | 2021-09-07 | Tail gas recovery device for reboiler rectification column of triethylene glycol dehydration device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111036657.XA CN113893639A (en) | 2021-09-07 | 2021-09-07 | Tail gas recovery device for reboiler rectification column of triethylene glycol dehydration device |
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| CN202111036657.XA Pending CN113893639A (en) | 2021-09-07 | 2021-09-07 | Tail gas recovery device for reboiler rectification column of triethylene glycol dehydration device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3616598A (en) * | 1969-08-14 | 1971-11-02 | Black Sivalls & Bryson Inc | Method and system for reconcentrating liquid absorbent |
| CN105214330A (en) * | 2015-10-29 | 2016-01-06 | 中船第九设计研究院工程有限公司 | A kind of hydrogen fluoride recovery and treatment method of electrolysis fluorine tail gas |
| CN109453573A (en) * | 2018-11-19 | 2019-03-12 | 陕西鼎捷能源环保有限公司 | Tail gas treatment process and processing unit for natural gas TEG dehydration device |
| CN213790769U (en) * | 2020-10-28 | 2021-07-27 | 中国石油化工股份有限公司 | Triethylene glycol rectifying column tail gas treatment system |
-
2021
- 2021-09-07 CN CN202111036657.XA patent/CN113893639A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3616598A (en) * | 1969-08-14 | 1971-11-02 | Black Sivalls & Bryson Inc | Method and system for reconcentrating liquid absorbent |
| CN105214330A (en) * | 2015-10-29 | 2016-01-06 | 中船第九设计研究院工程有限公司 | A kind of hydrogen fluoride recovery and treatment method of electrolysis fluorine tail gas |
| CN109453573A (en) * | 2018-11-19 | 2019-03-12 | 陕西鼎捷能源环保有限公司 | Tail gas treatment process and processing unit for natural gas TEG dehydration device |
| CN213790769U (en) * | 2020-10-28 | 2021-07-27 | 中国石油化工股份有限公司 | Triethylene glycol rectifying column tail gas treatment system |
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