CN106943763A - A kind of rectifier unit that waste liquid commercial recovery system is produced suitable for coal-ethylene glycol - Google Patents

A kind of rectifier unit that waste liquid commercial recovery system is produced suitable for coal-ethylene glycol Download PDF

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Publication number
CN106943763A
CN106943763A CN201710198209.7A CN201710198209A CN106943763A CN 106943763 A CN106943763 A CN 106943763A CN 201710198209 A CN201710198209 A CN 201710198209A CN 106943763 A CN106943763 A CN 106943763A
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China
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reboiler
cylinder
packed bed
stripping section
spinning
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CN201710198209.7A
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CN106943763B (en
Inventor
成兰兴
霍二福
王伯楠
师传兴
郝凌云
李迎春
赵增兵
程伟琴
王毅楠
冯明
王延花
谷中鸣
李胜军
侯占峰
魏新军
王留栓
孟立山
宁红军
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HENAN CHEMICAL INDUSTRY RESEARCH INSTITUTE CO LTD
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HENAN CHEMICAL INDUSTRY RESEARCH INSTITUTE CO LTD
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    • 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
    • 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
    • B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
    • B01D3/322—Reboiler specifications
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/30—Loose or shaped packing elements, e.g. Raschig rings or Berl saddles, for pouring into the apparatus for mass or heat transfer
    • 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
    • C02F1/043—Details
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

A kind of rectifier unit that waste liquid commercial recovery system is produced suitable for coal-ethylene glycol, it includes being equipped with the reboiler cylinder of reboiler chuck outside, it is arranged on the stripping section cylinder being connected at the top of reboiler cylinder and with reboiler cylinder, being used at the top of stripping section cylinder drives the power set of rotary shaft, and the reboiler scraper plate in reboiler cylinder, it is arranged on the spinning packed bed of stripping section inner barrel；The rotary shaft is extended in reboiler cylinder through spinning packed bed and is combined successively with spinning packed bed and reboiler scraper plate straight down；Liquid distribution trough is provided with the spinning packed bed；The material gaseous phase outlet being connected with rectifying column is provided with above stripping section cylinder side, material inlet is provided with above spinning packed bed, reboiler chuck upper lateral part is provided with heating steam inlet, the side lower part of reboiler chuck is provided with steam (vapor) outlet, reboiler cylinder body bottom is provided with restructuring sub-export.

Description

A kind of rectifier unit that waste liquid commercial recovery system is produced suitable for coal-ethylene glycol
Technical field
The present invention relates to a kind of rectifier unit that waste liquid commercial recovery system is produced suitable for coal-ethylene glycol, belong to chemical industry Technical field.
Background technology
Coal-ethylene glycol is the device for producing ethylene glycol by processes such as gasification, coupling, hydrogenation, rectifying by raw material of coal, In the critical role of occupying of China's coal chemical industry, the built coal-ethylene glycol device of the cut-off end of the year 2015 China has 1,600,000 Just there are three sets of devices for producing 200000 tons per year the production scale of ton, only Henan area, and production capacity, 2016 will be newly-built up to 600,000 tons Into 1,660,000 tons of coal-ethylene glycol devices.41 covering devices will be built up to the year two thousand twenty is estimated, aggregated capacity reaches 10,260,000 tons.
In the production process of coal-ethylene glycol, complicated component in a certain amount of waste liquid, waste liquid can be produced, contains nearly 40 A variety of contents not wait synthesising by-product, but wherein content it is higher be still ethylene glycol and diethylene glycol, both, which add up to, accounts for waste liquid 80% or so of total amount, therefore with higher value.Current processing method is all to carry out common rectification under vacuum by waste liquid In ethylene glycol and diethylene glycol reclaimed, but coal-ethylene glycol waste liquid residence time in the reboiler of traditional rectifying column Long, heavy constituent easily occurs polymerizeing and coking at high temperature, causes Severe blockage rectifying device, it is impossible to normally produced.Separately Outer traditional stuffing rectification column is not high due to column efficiency, causes the tower height of rectifying column larger, and energy consumption is big, and investment is big, operating cost It is high.How to find a kind of polymerization coking problem that can solve rectifying and tower height is reduced by new technology, reduce investment, save life Production expense is that coal-ethylene glycol industry waste resource recycles problem urgently to be resolved hurrily.
The content of the invention
It is an object of the invention to provide a kind of small investment, energy consumption are low, stable suitable for coal-ethylene glycol production waste liquid The rectifier unit of commercial recovery system.
The purpose of the present invention can be realized by following technique measures：
The rectifier unit for being applied to coal-ethylene glycol production waste liquid commercial recovery of the present invention is that rectifying column stripping section is placed in into tower Stripping section reboiler coupling device outer and that composition is coupled with reboiler；Described stripping section reboiler coupling device includes external There is the reboiler cylinder of reboiler chuck, be arranged on the stripping section cylinder being connected at the top of reboiler cylinder and with reboiler cylinder Body, being used at the top of stripping section cylinder drives the power set of rotary shaft, and boiling again in reboiler cylinder Device scraper plate, is arranged on the spinning packed bed of stripping section inner barrel；The rotary shaft extends through spinning packed bed straight down It is combined in reboiler cylinder and successively with spinning packed bed and reboiler scraper plate；It is provided with the spinning packed bed Liquid distribution trough；The material gaseous phase outlet being connected with rectifying column is provided with above stripping section cylinder side, in spinning packed bed Top is provided with material inlet, reboiler chuck upper lateral part is provided with heating steam inlet, in the side lower part of reboiler chuck Steam (vapor) outlet is provided with, reboiler cylinder body bottom is provided with restructuring sub-export.
Heretofore described spinning packed bed is made up of ring stainless steel silk screen；The liquid distribution trough is to be evenly distributed with The annular construction member of through hole, 0.4 ~ 0.6mm of aperture.
The operation principle of the present invention is as follows：
Spinning packed bed in apparatus of the present invention stripping section is coupled with the reboiler scraper plate in reboiler cylinder, and coaxial with scraper plate Rotation, makes stripping section packed bed formation super gravity field, the liquid phase of packed bed inner cylinder is ejected into hypergravity through liquid distribution trough Effect is lower and the broken tear of filler collision forms liquid particle, and radially flows from inside to outside, and liquid phase thing is collected through liquid trap Material enters reboiler cylinder inboard wall into the heated steam vaporization of shaped liquid film along reboiler cylinder tangential direction, rises from reboiler Then through packed bed, faulting gas liquid is exchanged gas phase each other with liquid phase from bottom to top, and due to the effect of super gravity field, gas-liquid is exchanged Mass-and heat-transfer efficiency improve the 1-2 order of magnitude, the rotary packed bed of 500mm height can be equivalent to traditional rectifying tower height degree 5-10 rice.Rectifying column stripping section is placed in reboiler, the height of rectifying column is reduced.Reboiler is made back using film scraper plate To liquid film of the heavy constituent of reboiler along the rotated scraper plate formation 0.5-1.00mm of cylinder inboard wall, soon, the residence time is short for heat transfer, The coking and polymerization for avoiding heavy constituent are produced.Thoroughly solve reboiler coking and blocking and rectifying tower height that traditional rectifying is caused High problem is spent, investment is saved, the steady and continuous operation of device has been ensured.
Beneficial effects of the present invention are as follows：
1st, present invention firstly provides rectifying column stripping section is placed in outside tower, and in reboiler coupling, form super using rotating mechanism Gravitational field, the liquid phase for being ejected into packed bed inner cylinder through liquid distribution trough crushes tear shape in the presence of hypergravity with filler collision Into liquid particle, and radially flow from inside to outside, collect liquid phase material through liquid trap enters along reboiler cylinder tangential direction Reboiler cylinder inboard wall is heated steam vaporization into shaped liquid film, and the gas phase from the rising of reboiler cylinder is then from bottom to top through packed bed Faulting gas liquid is exchanged each other with liquid phase, due to the effect of super gravity field, and the mass-and heat-transfer efficiency that gas-liquid is exchanged improves 1-2 The individual order of magnitude, 500mm height it is rotary packed bed can equivalent to traditional rectifying tower height degree 5-10 rice, improve stripping section Mass-and heat-transfer efficiency, reduces tower height.Save energy consumption and investment.
2nd, the present invention in reboiler using film scraper evaporator replace traditional floating head type or shell and tube reboiler, make into Enter liquid film of the liquid material along heating surface formation 0.5-1mm in reboiler cylinder, the liquid component residence time is short, heat transfer efficiency It is high, it is to avoid material makes device to be run with steady and continuous due to prolonged high-temperature coking and aggregation problem, it is to avoid frequently Stop the waste that car is caused.
Brief description of the drawings
Fig. 1 is the process chart that waste liquid commercial recovery system is produced for coal-ethylene glycol.
Sequence number in Fig. 1：1 is ethylene glycol rectifying column, and 2 be stripping section reboiler coupling device, and 3 be ethylene glycol rectifying column tower top Condenser, 4 be ethylene glycol pans, and 5 be diethylene glycol rectifying column, and 6 be the second stripping section reboiler coupling device, and 7 be diethyl Glycol rectifying column tower top condenser, 8 be diethylene glycol pans.
Fig. 2 is the stripping section reboiler coupling device of the present invention.
Fig. 3 is Fig. 2 A-A sectional views.
Sequence number in Fig. 2,3：9 be reboiler cylinder, and 10 be reboiler chuck, and 11 be reboiler scraper plate, and 12 be rotary shaft, 13 It is heating steam inlet, 14 be stripping section cylinder, and 15 be material inlet, and 16 be power set, and 17 be motor support base, and 18 be thing Expect gaseous phase outlet, 19 be spinning packed bed, and 20 be steam (vapor) outlet, and 21 be restructuring sub-export, and 22 be liquid distribution trough.
Embodiment
The present invention is below with reference to embodiment（Accompanying drawing）It is further described：
As shown in Figure 2,3, the rectifier unit for being applied to coal-ethylene glycol production waste liquid commercial recovery of the invention is by rectifying column Stripping section is placed in outside tower and the stripping section reboiler coupling device 2 of composition is coupled with reboiler；Described stripping section reboiler coupling Attach together and put 2 and include being equipped with the reboiler cylinders 9 of reboiler chuck 10 outside, be arranged on the top of reboiler cylinder 9 and with reboiler cylinder The stripping section cylinder 14 that body 9 is connected, the power set 16 for being used to drive rotary shaft 12 positioned at the top of stripping section cylinder 14, with And the reboiler scraper plate 11 in reboiler cylinder 9, it is arranged on the spinning packed bed 19 inside stripping section cylinder 14；It is described Rotary shaft 12 is extended in reboiler cylinder 9 and successively with spinning packed bed 19 and again through spinning packed bed 19 straight down Boiling device scraper plate 11 is combined；Liquid distribution trough 22 is provided with the spinning packed bed 19；Above the side of stripping section cylinder 14 The material gaseous phase outlet 18 being connected with rectifying column is provided with, the top of spinning packed bed 19 material inlet 15 is provided with, again The upper lateral part of boiling device chuck 10 is provided with heating steam inlet 13, and the side lower part of reboiler chuck 10 is provided with steam (vapor) outlet 20, Restructuring sub-export 21 is provided with the bottom of reboiler cylinder 9.
Heretofore described spinning packed bed 19 is made up of ring stainless steel silk screen；The liquid distribution trough 22 is uniform It is furnished with the annular construction member of through hole, 0.4 ~ 0.6mm of aperture.
The present invention is using coal-ethylene glycol process waste as raw material, by rectifier unit by the ethylene glycol in waste liquid and diethyl two Alcohol reclaim, technological process and（Referring to Fig. 1 and Fig. 2）.Reboiler chuck 10 is first passed through steam preheating to 160 DEG C of cavity temperature. Coal-ethylene glycol production waste liquid by pretreatment squeezes into material inlet 15 with gear pump, is uniformly ejected into through liquid distribution trough 22 The inner cylinder of the spinning packed bed 19 of rotation, liquid phase is dispersed into misty liquid droplets or liquid in the super gravity field of rotary packed bed formation Film Radial Flow, enters the reboiler with reboiler scraper plate 11 from rotary packed bed outer barrel outflow through liquid trap tangential direction Cylinder inboard wall, forms 0.5-1mm liquid films in the presence of reboiler scraper plate 11, is heated rapid gasification, and gas phase rises rotated Packed bed enters the gas phase entrance of ethylene glycol rectifying column 1 after being exchanged with the liquid phase cross-flow gas-liquid of packed bed, through ethylene glycol rectifying column Overhead condenser 3 is condensed into liquid, and tower top temperature controls 110 DEG C -115 DEG C；A part is back to ethylene glycol rectifying column 1, backflow Than control 2:1；Ethylene glycol receiving tank 4 is partly into as qualified finished product.
The reboiler bottom heavy constituent pump for the stripping section reboiler coupling device 2 being connected with ethylene glycol rectifying column 1 is beaten Enter the second stripping section reboiler coupling device 6 being connected with diethylene glycol rectifying column 5, carry out the identical mistake with more than Journey, control condition is 180 DEG C of vapor (steam) temperature of addition, reflux ratio 1：1,140-145 DEG C of tower top temperature.Whole system is in 700- Run under 720mmHg vacuum conditions.
Specific experiment example 1 is as follows：
100 tons of pretreated coal-ethylene glycol waste liquids are added in raw material storage tank, contain ethylene glycol and diethyl two in waste liquid after measured The total content 82.66% of alcohol, wherein ethylene glycol 40.23%, diethylene glycol 42.43%.
Open ethylene glycol rectifying column reboiler heating steam valve, control steam pressure 0.75MPa；Vavuum pump is opened, is made System vacuum maintains 700-720mmHg stable；Open the power set 16 of the first stripping section reboiler and coupling device, rotating speed It is adjusted to 300 revs/min；The cooling water valve of ethylene glycol rectifying column tower top condenser 3 is opened, regulation reflux ratio is infinite reflux；Open Waste liquid raw material pump, control flow 1000Kg/h；110 DEG C of tower top temperature is treated, and stably at 110-115 DEG C, adjusts reflux ratio 2: 1, start to produce qualified ethylene glycol product.
The reboiler bottom heavy constituent pump for the stripping section reboiler coupling device 2 being connected with ethylene glycol rectifying column 1 is beaten Enter the second stripping section reboiler coupling device 6 being connected with diethylene glycol rectifying column 5, according to ethylene glycol rectifying column order phase Same program opens diethylene glycol distillation system, and control adds steam pressure 1.05MPa, and reboiler rotating speed is adjusted to 300 revs/min Clock, vacustat is in the range of 700-720mmHg, and overhead reflux compares 1:1,140-145 DEG C of tower top temperature.
Device is continuously run 105 hours, ethylene glycol rectifying column tower top 37.65 tons of ethylene glycol of extraction, content 99.00%, second two The alcohol rate of recovery 92.22%.Diethylene glycol rectifying column tower top produces 38.19 tons of diethylene glycol, content 99.5%, the diethylene glycol rate of recovery 90.01%.Waste liquid ethylene glycol and diethylene glycol overall recovery 91.08%.
Specific experiment example 2 is as follows：
30 tons of pretreated coal-ethylene glycol waste liquids are added in raw material storage tank, contain ethylene glycol and diethylene glycol in waste liquid after measured Total content 80.51%, wherein ethylene glycol 39.85%, diethylene glycol 40.66%.
According to the identical startup procedure of specific experiment example 1,34 hours are continuously run.Ethylene glycol rectifying column tower top is produced 11.09 tons of ethylene glycol, content 99.15%, the ethylene glycol rate of recovery 88.96%.Diethylene glycol rectifying column tower top produces diethylene glycol 10.98 tons, content 99.35%, the diethylene glycol rate of recovery 90.00%.Waste liquid ethylene glycol and diethylene glycol overall recovery 89.65%.

Claims (2)

1. a kind of rectifier unit that waste liquid commercial recovery system is produced suitable for coal-ethylene glycol, it is characterised in that：The rectifying Device is the stripping section reboiler coupling device that rectifying column stripping section is placed in outside tower to and coupled with reboiler composition（2）；It is described Stripping section reboiler coupling device（2）Including being equipped with reboiler chuck outside（10）Reboiler cylinder（9）, it is arranged on reboiler Cylinder（9）Top and with reboiler cylinder（9）The stripping section cylinder being connected（14）, positioned at stripping section cylinder（14）Top For driving rotary shaft（12）Power set（16）, and installed in reboiler cylinder（9）Interior reboiler scraper plate（11）If, Put in stripping section cylinder（14）Internal spinning packed bed（19）；The rotary shaft（12）Spinning packed bed is passed through straight down （19）Extend to reboiler cylinder（9）It is interior and successively with spinning packed bed（19）With reboiler scraper plate（11）It is combined；Described Spinning packed bed（19）Inside it is provided with liquid distribution trough（22）；In stripping section cylinder（14）It is provided with and is connected with rectifying column above side The material gaseous phase outlet connect（18）, in spinning packed bed（19）Top is provided with material inlet（15）, in reboiler chuck（10） Upper lateral part is provided with heating steam inlet（13）, in reboiler chuck（10）Side lower part be provided with steam (vapor) outlet（20）, again Boil device cylinder（9）Bottom is provided with restructuring sub-export（21）.
2. the rectifier unit according to claim 1 that waste liquid commercial recovery system is produced suitable for coal-ethylene glycol, it is special Levy and be：The spinning packed bed（19）It is to be made up of ring stainless steel silk screen；The liquid distribution trough（22）To be evenly distributed with The annular construction member of through hole, 0.4 ~ 0.6mm of aperture.
CN201710198209.7A 2017-03-29 2017-03-29 A kind of rectifier unit suitable for coal-ethylene glycol production waste liquid commercial recovery system Active CN106943763B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100101930A1 (en) * 2008-10-27 2010-04-29 Sechrist Paul A Heat Pump for High Purity Bottom Product
CN102125770A (en) * 2010-12-15 2011-07-20 天津大学 Continuous rectification device and method for treating heat-sensitive material by using wiped film evaporator
WO2015116647A1 (en) * 2014-01-31 2015-08-06 Uop Llc Natural gas liquids stabilizer with side stripper
CN205145645U (en) * 2015-11-24 2016-04-13 杰瑞石油天然气工程有限公司 Hypergravity revolving bed device and hypergravity rectification plant who constitutes thereof
CN106186135A (en) * 2016-08-30 2016-12-07 安徽八化工股份有限公司 Waste sulfuric acid containing chlorine dechlorination apparatus
CN106315953A (en) * 2016-09-09 2017-01-11 福州大学 Advanced recycling treatment process and device for waste water generated from synthetic leather production

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100101930A1 (en) * 2008-10-27 2010-04-29 Sechrist Paul A Heat Pump for High Purity Bottom Product
CN102125770A (en) * 2010-12-15 2011-07-20 天津大学 Continuous rectification device and method for treating heat-sensitive material by using wiped film evaporator
WO2015116647A1 (en) * 2014-01-31 2015-08-06 Uop Llc Natural gas liquids stabilizer with side stripper
CN205145645U (en) * 2015-11-24 2016-04-13 杰瑞石油天然气工程有限公司 Hypergravity revolving bed device and hypergravity rectification plant who constitutes thereof
CN106186135A (en) * 2016-08-30 2016-12-07 安徽八化工股份有限公司 Waste sulfuric acid containing chlorine dechlorination apparatus
CN106315953A (en) * 2016-09-09 2017-01-11 福州大学 Advanced recycling treatment process and device for waste water generated from synthetic leather production

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Inventor before: Feng Ming

Inventor before: Li Yingchun

Inventor before: Hou Zhanfeng

Inventor before: Wei Xinjun

Inventor before: Fu Zhenghui

Inventor before: Zhou Tao

Inventor before: Hou Zhiyong

Inventor before: Xia Chenghao

Inventor before: Kuang Wenhui

Inventor before: Zhang Chunling

Inventor before: Huo Erfu

Inventor before: Xing Wenting

Inventor before: Yue Yanrong

Inventor before: Gao Qinghuan

Inventor before: Wang Yanhua

Inventor before: Ruan Chenlei

Inventor before: Chen Lei

Inventor before: Guo Ge

Inventor before: Wang Liushuan

Inventor before: Meng Lishan

Inventor before: Ning Hongjun

Inventor before: Zhao Zengbing

Inventor before: Li Shengjun

Inventor before: Other inventors request not to publish names

Inventor before: Wang Bonan

Inventor before: Shi Chuanxing

Inventor before: Gu Zhongming

Inventor before: Hao Lingyun

Inventor before: Cheng Weiqin

Inventor before: Wang Yinan