CN2235446Y - Equipment for increasing yield of phenol and naphthalene used for coal tar distillation tower - Google Patents
Equipment for increasing yield of phenol and naphthalene used for coal tar distillation tower Download PDFInfo
- Publication number
- CN2235446Y CN2235446Y CN 95227718 CN95227718U CN2235446Y CN 2235446 Y CN2235446 Y CN 2235446Y CN 95227718 CN95227718 CN 95227718 CN 95227718 U CN95227718 U CN 95227718U CN 2235446 Y CN2235446 Y CN 2235446Y
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- CN
- China
- Prior art keywords
- tower
- naphthalene
- phenol
- coal tar
- distilling
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model relates to a device for coal tar distilling towers for increasing the output of phenol and naphthalene, which is composed of a coal tar distilling tower, a phenol coal tar side line and a naphthalene coal tar side line which are led out from the middle upper part and the middle lower part of the coal tar distilling tower, wherein the two side lines are connected by a communicating pipe behind looking glass of a condenser. The utility model fully uses and exerts the efficacy of the tower, and phenol and naphthalene are collected into outer three mixing distilling fractions from the interior and the exterior of the tower. The distilling satisfies the requirements of industrial distilling towers for raw materials after alkali cleaning and increases the output of phenol and naphthalene. The utility model has the advantages of easy implementation and convenient operation and is suitable for single-tower type and double-tower type coal tar processing technological process.
Description
The utility model relates to the device of a kind of coal tar distillation tower with raising phenol, naphthalene yield, belongs to the separation chemical industry equipment of carbonaceous material.
Existing coal tar distillation tower, its effect mainly are to cut qualified " phenol, naphthalene, wash " fraction, as the raw material that extracts main Chemicals such as phenol, naphthalene.
Shown in Figure 1 is to utilize set carbolic oil side line 3 and the naphtalene oil side line 4 in fraction tower middle and upper part and middle and lower part to take carbolic oil fraction and naphthalene to wash two mixed fractions respectively, and flows out by condenser 6 and sight glass 7 respectively.Use this device when column bottom temperature is high slightly, naphthalene is easy to run away from the carbolic oil fraction, and the impurity component can be brought into naphthalene, wash in the fraction at the bottom of the tower.When temperature was low, then naphthalene content must increase in the heavy wash oil, and this has not only influenced the washing oil quality, and naphthalene also has loss.Especially down-step naphthalene distillation workshop section in mix in the fractions light component seldom owing to wash two, in the NAPTHALENE FLAKES. (INDUSTRIAL GRADE primary tower at the gained naphthalene, the necessary liquid stream of each plate of upper strata in the tower can not be provided, carry out normal vapour-liquid process, what is called " dry blowing " phenomenon can occur, tower can not normal running.Fraction tower 1 shown in Fig. 1 is a feeding pipe, and 2 is light oil fraction outlet pipe, and 5 is the heavy wash oil outlet pipe.
Fraction tower structure shown in Figure 2 is identical substantially with that shown in Figure 1, and this mode that cuts fraction is that carbolic oil side line 3 is closed, and from naphtalene oil side line 4, cuts separately so-called " three mix fraction ", i.e. phenol, naphthalene, washing oil fraction.Do like this because the carbolic oil fraction can not get exploitation, its as a result the carbolic oil fraction certainly will progressively accumulate on fraction tower upper strata, tower top temperature rises, and is not too high for containing the phenol amount in the control light oil, must strengthen quantity of reflux, carbolic oil is expanded downwards, has reduced the number of effective plate of tower, and the tower internal pressure is increased, anthracene tower and second evaporator internal pressure also strengthen thereupon, naphthalene can be distributed in heavy wash oil and the carbolineum goes morely, phenol then major part can not adopted, and has reduced the concentration degree of naphthalene, phenol; In addition, again because of this kind mode cut " three mix fraction " in light component---the carbolic oil fraction is less, in the NAPTHALENE FLAKES. (INDUSTRIAL GRADE distillation process, must take carbolic oil round-robin remedial measures, with the control tower top temperature; The higher component accumulates in this round-robin carbolic oil, makes the tower top temperature instability and is difficult to control, and certainly will influence the tower effect is the refining rate of naphthalene.
More than two kinds of modes that cut fraction adopted by domestic all coal chemical enterprises always, coke tar distillation tower and NAPTHALENE FLAKES. (INDUSTRIAL GRADE distillation tower are normally moved, influence the yield of phenol, naphthalene.
The purpose of this utility model is to provide a kind of coal tar distillation tower with the device that improves phenol, naphthalene yield, adopts this device can make tar distillation and whole tar system of processing stable, and operation easily improves the yield of phenol, naphthalene.
The purpose of this utility model is achieved in that this coal tar distillation tower is made of the coke tar distillation tower and the naphtalene oil side line of being drawn by the carbolic oil side line middle and lower part that draw the coke tar distillation tower middle and upper part with the device of the yield that improves phenol, naphthalene, behind the condenser sight glass of carbolic oil side line and naphtalene oil side line, be provided with and be connected communicating pipe, cut naphthalene, phenol, wash " outer three mix " fraction with two side lines.
The utility model advantage:
1, improves the yield of phenol, naphthalene
1) the coal tar distillation tower cuts under the situation of fraction at this device, operation is normal, the tower effect is utilized fully and is brought into play, improved the concentration degree of phenol, naphthalene, simultaneously, because the carbolic oil fraction is sneaked into naphthalene and washed fraction, the naphthalene that relaxes in the carbolic oil fraction behind the naphthalene content can reclaim again, thereby outside Ta Nei and tower, phenol and naphthalene are concentrated on to greatest extent " outer three mix " fraction, improved the concentration degree of phenol and naphthalene.
2) sneaking into owing to the carbolic oil fraction, in " outer three mix " fraction after the washing light component---carbolic oil fraction content is more, make NAPTHALENE FLAKES. (INDUSTRIAL GRADE distillation tower trim the top of column situation preferable, tower top temperature tends towards stability, and tower is imitated performance better, and the refining rate of NAPTHALENE FLAKES. (INDUSTRIAL GRADE improves, the utility model is in ten thousand tons of tar of year processing 7-8, the yield of naphthalene and phenol mode more shown in Figure 2 improves respectively more than 10% and 20%, washes benzene simultaneously and also can be guaranteed with the washing oil quality, helps the raising of crude benzol yield.
2, easy to operate: because of can suitably relaxing the content of naphthalene in the carbolic oil fraction, in operation as long as the index of control tower head tower substrate material, the side line position select for use suitable after, need not carry out complicated adjusting basically, thus implement easily, easy to operate.
3, applied widely: the utility model can be used for single tower, two-tower type tar distillation flow process and single stove list tower, twin furnace double tower NAPTHALENE FLAKES. (INDUSTRIAL GRADE distillation process.In addition, the fraction of this " outer three mix " also can draw by remix after naphthalene washing oil fraction and the independent respectively dephenolize of carbolic oil fraction.
The utility model concrete structure is provided by following two-tower type tar steam oil flow implementation example and accompanying drawing thereof:
Structural representation when Fig. 1 is two side lines of existing fraction tower unlatching.
Fig. 2 is existing fraction tower structural representation when only opening a side line.
Fig. 3 is the utility model structural representation.
Describe in detail below in conjunction with accompanying drawing.
With reference to Fig. 3, in coal tar processing workshop section, this fraction tower diameter 1.8m, tower height 21.9m, in have 41 layers of tower trays to enter the fraction tower from the pipeline 1 that is positioned at 5 layers from the material of anthracene tower, the pipeline 2 of cat head is taked light oil, 34 layers of carbolic oil side line 3 can opening in 30,32,34,35 layers are adopted the carbolic oil fraction, can open 18 layers of naphtalene oil side line 4 in 16,18,20,22 layers adopts naphthalene and washes two and mix fractions, the two kinds of fractions condenser 5 by separately and sight glass 7 respectively mix with communicating pipe 8 and import the fraction groove, after the alkali cleaning dephenolize, as industrial naphthalene raw material.
Claims (1)
1, the coal tar distillation tower device that improves phenol, naphthalene yield, constituted by coke tar distillation tower and the carbolic oil side line of drawing, the naphtalene oil side line that draws the middle and lower part by the coke tar distillation tower middle and upper part, it is characterized in that behind the condenser sight glass of carbolic oil side line and naphtalene oil side line, be provided with and be connected communicating pipe, cut naphthalene, phenol, wash " outer three mix " fraction with two side lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95227718 CN2235446Y (en) | 1995-12-06 | 1995-12-06 | Equipment for increasing yield of phenol and naphthalene used for coal tar distillation tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95227718 CN2235446Y (en) | 1995-12-06 | 1995-12-06 | Equipment for increasing yield of phenol and naphthalene used for coal tar distillation tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2235446Y true CN2235446Y (en) | 1996-09-18 |
Family
ID=33873489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95227718 Expired - Lifetime CN2235446Y (en) | 1995-12-06 | 1995-12-06 | Equipment for increasing yield of phenol and naphthalene used for coal tar distillation tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2235446Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015077048A1 (en) * | 2013-11-19 | 2015-05-28 | Uop Llc | Process for purifying products from coal tar |
-
1995
- 1995-12-06 CN CN 95227718 patent/CN2235446Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015077048A1 (en) * | 2013-11-19 | 2015-05-28 | Uop Llc | Process for purifying products from coal tar |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Designer after: Duan Chenyang Designer after: Zhang Jichang Designer before: Zhang Jichang Designer before: Duan Chenyang |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: DESIGNER; FROM: ZHANG JICHANG; DUAN CHENYANG TO: DUAN CHENYANG; ZHANG JICHANG |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |