| Quite a
lot of hi-tech tower technologies developed by our New Tianjin T. & D.
Co., Ltd. were widely and successfully applied in petrochemical,
refinery, fertilizer, fine chemical, pharmaceutical, metallurgical, and
other industries. We supply very important means for various enterprises
to solve the problems of capacity increasing, energy saving, cost
reducing and so on. Some of our sample applications are as follows.
Rectification
of ethylbenzene/styrene (EB/SM)
Applications in oil refinery
Rectification of alcohol
Application
cases in nitrogen fertilizer industry
Absorption of formaldehyde
Fine chemicals field
Separation of high purity
material
High
efficiency mist & drift eliminators, TJCW demister
Rectification
of ethylbenzene/styrene (EB/SM)
Styrene is a kind of temperature sensitive material. The difference
of boiling points between ethylbenzene and styrene is only 9°C.
Normally the column needs 80 theoretical stages to meet the demand of
styrene at top less than 2 percent and ethylbenzene at bottom less than
1000ppm, which belongs to precision fractionation. In China except a few
import styrene plants almost the others were designed or revamped by our
company.
For instance 30 thousand tons per year SM plant of SINOPEC located in
Fushun Chemical-plastic Factory, the EB/SM separating column was
designed and manufactured by us. High efficiency structured packing and
novel internals were used in this packed column. At the column head
actual concentration of SM is less than 1% and at the column bottom EB
is less than 400 ppm, which is far beyond the design specifications.
This project was appraised by experts organized by SINOPEC in November
1996 and has been awarded SINOPEC first prize of "Science and
Technology Progress Prize".
In September 1997, the EB/SM separating column of 60 thousand tons per
year SM plant imported from U.S.A. in Qilu Petrochemical Corp. was
reformed by us. After reforming the top SM concentration reduced from
more than 6% to less than 1% and the bottom EB from 2000ppm to less than
1000ppm. This project was also appraised by experts organized by SINOPEC
in May 1998. In 1998 with the same technology we revamped the same
capacity of 60 thousand tons per year SM plant in Yanshan Petrochemical
Corp. We even got more successful results.
In September 1998 we signed contract with Dalian Petrochemical Corp. to
design and manufacture tower packing and internals for its EB / SM
separating column of 100 thousand tons per year SM plant. In November
1998 this project passed through experts' appraisal organized by SINOPEC,
which is now under construction.
Besides above-mentioned projects, our know how in this field also has
been applied to diameter of 2-meter and 2.4-meter columns in Danyang
Fertilizer Factory, 1-meter diameter column in Yueyang Terylene Factory,
2-meter diameter column in Nanjing Jinlin Petrochemical Corp., 3.2-meter
diameter column in Organic Synthesis Factory of Jilin Chemical
Industrial Corporation.
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Applications in oil
refinery
There are many opportunities in oil and gas processing industry for
using structured packing to increase capacity, improve product quality,
save of energy and reduce operating cost.
For example the revamping of vacuum tower with structured packing may
result in advantages as follows.
(1) increase the VGO yield,
(2) economize on diluting or stripping steam,
(3) lower the flash temperature, and hence the cracking rate,
(4) wash out organometallic components ( Va, Ni ) and carbon residue in
wash section at lower liquid rates.
The diameter of 2.4 meters lube oil vacuum tower in the No.3 Oil
Refinery of Fushun Petrochemical Corp., after reforming by our company
due to the superior separation performance of the packing the ASTM 5-95%
overlap was reduced evidently.
In absorption/stability plant of catalyst cracking system, with high
efficiency packed column the dry gas will be even much drier, and more
yield can be obtained, such as in Tianjin Dagang Oil-field Refinery, the
No.3 Oil Refinery of Fushun Petrochemical Corp., Qingdao Petrochemical
Factory, Henan Nanyang Refinery and so on.
Our unique WSY structured packing was adopted in diameter of 1.6 and
2.0 meters pre-fractionator in the No.3 Oil Refinery of Fushun
Petrochemical Corp. After reforming both capacity and separating
efficiency raised more than 40% comparing with before. And the same
results as in a diameter of 2.4 meters heavier compound column for
removing lights in Maoming Petrochemical Corp.
One meter in diameter solvent column in Tianjin Petrochemical Corp.,
originally was tray column for producing No.6, No.120 and No.200
solvent-refined oil. After revamping with structured packing by us, one
side ling more was got to produce aromatic solvent-refined oil. The
original stand alone aromatic solvent-refined oil column is shutdown and
uses for other purpose.
In 1997 the high efficiency packed column was adopted in one-meter
diameter 1-butene separating system in Organic Synthesis Factory of
Jilin Chemical Industrial Corp. This project was excellent. In the same
year our unique co-flow jet combined tray and improved MD tray were
successfully used in the reforming of 1.2-meter diameter stripping
column of aromatic extraction system, 1.2-meter diameter toluene/benzene
separating column, 1.8- meter diameter depropanizer, etc., in the same
above mentioned factory.
In 1999, during overhaul, the de-DME and de-MeOH column in the MTBE
system of Gaoqiao Chemical Industrial Corporation were replaced with
JCPT trays. The output increased from 20,000 tons/y to 60,000 tons/y.
In 2000, the Absorption-Stabilization System of FCCU of Dalian Petrochemical
Corp. was revamped with JCPT trays. The process capacity of the unit
enhanced from 80,000 t/y to 90,000 t/y, while the content of propylene
in the dry gas reduced from 1.5% to 0.3%, energy consumption also
decreased.
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Rectification of alcohol
With our packed column technology we have successfully applied to the
purification and recovery of methanol, ethanol, isopropyl alcohol,
butanol, octanol and so on.
An annual output of 50 thousand-ton methanol plant in Nitrogen
Fertilizer Factory of Jilin Chemical Industrial Corp., its methanol
distillation column is valve tray column and 2.4 meters in diameter.
After revamping with high efficiency structured packing the capacity
raised to 2 times as before, i.e. 100 thousand tons of methanol. At
column bottom methanol concentration was reduced from 2~3% to less than
0.1%.
Besides, we have successfully done the reforming design or manufacturing
for methanol distillation, methanol and ethanol recovery equipment in
Chengdu No. 2 Chemical Works, Rubber Factory of Yanshan Petrochemical
Corp., Nantong Agricultural Pesticide Factory, Shanxi Agricultural
Pesticide Factory, Beijing Pharmaceutical Factory, Shandong Anqiu
Fertilizer Factory and in the others. All these projects satisfied our
clients.
Reforming of butanol and octanol distillation plants in Qilu
Petrochemical Corp., Daqin Petrochemical Corp. and Jilin Chemical
Industrial Corporation, and reforming of formaldehyde removal column in
pentaerythritol plant in Zhangsong Chemical works were successful. The
output, yield and hence the economical profit increased significantly.
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Application
cases in nitrogen fertilizer industry
The high efficiency packed column were widely used in synthetic
ammonia process by us, such as desulfurization, decarbonization,
cuprammonium solution absorption, ammonia water absorption, situated hot
water column, etc. All cases were very successful in the following near
100 enterprises, the biggest column was 4.2 meters in diameter:
The No.2 Nitrogen Fertilizer Factory of Qilu Petrochemical Corp.,
Nitrogen Fertilizer Factory of Jilin Chemical Industry Corp., Anhui Pihe
Fertilizer Factory, Jilin Tonghua Fertilizer Factory, Shandong Dezhou
Fertilizer Factory, Shandong Wendeng Fertilizer Factory, Shandong Luxi
Fertilizer Factory, Heilongjiang Boli Fertilizer Factory, Hebei Leting
Fertilizer Factory, Hebei Luannan Fertilizer Factory, Hebei Xincheng
Fertilizer Factory, Hebei Yi County Fertilizer Factory and the others.
We have also successfully adopted our own developed high efficiency
dedust technology into the top of granulating towers in Sichuan No.2
Nitrogen Fertilizer Factory and in the No.2 Nitrogen Fertilizer Factory
of Qilu Petrochemical Corp. Both cases got very ideal results, not only
more products recovered, but also the problem of environmental pollution
overcome.
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Absorption of
formaldehyde
More than half of formaldehyde productive enterprises in China has
good business relationship with our company. Formaldehyde absorption
column using high efficiency structured packing has the advantage of
high capacity, lower operating cost, high product purification and less
investment. Our know how in this field has popularized to Henan Anyang
Plastic Factory, Chengdu No.2 Chemical Works, Chongqing Synthetic
Chemical Plant, Sichuan Vinylon Factory, Jinan Synthetic Chemical Plant,
Nanjing Meishan Chemical Works and other more than 20 enterprises.
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Fine chemicals field
In separation process of intermediate compounds of Shanxi
Agricultural Pesticide Factory, Nantong Agricultural Pesticide Factory,
Qingdao Agricultural Pesticide Factory and other similar factories, the
use of high efficiency packed columns has resulted in good effects. For
example the 2.6-meter diameter trimethyl ester distillation column had
excellent results.
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Separation of
high purity material
In p-xylene productive plant of Tianjin Petrochemical Corp., extracted
mixture separating column was valve tray column and 3.2 meters in
diameter. Design specifications were diethylbenzene content at column
top less than 50ppm and xylene content at bottom less than 50ppm as
well. In 1996 during overhaul the upper part trays were replaced with
high efficiency structured packing. The output increased from 70,000
tons/y to 90,000 tons/y, top and bottom products were all reach design
specifications, while before they were far from demand.
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High
efficiency mist & drift eliminators, TJCW demister
The novel demisters developed by our own are very useful and helpful
in following fields:
(1) Entrainment separation at the top of distillation or absorption
columns,
(2) Eliminating oil mist after compressor, which is especially important
in reactor with catalyst,
(3) Eliminating mist and draft in waste gas treatment,
(4) Liquid entrainment removal for natural gas,
(5) Liquid entrainment removal for evaporator,
(6) Liquid entrainment removal for waste heat boiler.
The largest TJCW demister diameter is up to 5.4 meters.
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