CN203768307U - Negative-pressure benzol steaming device - Google Patents
Negative-pressure benzol steaming device Download PDFInfo
- Publication number
- CN203768307U CN203768307U CN201420151138.7U CN201420151138U CN203768307U CN 203768307 U CN203768307 U CN 203768307U CN 201420151138 U CN201420151138 U CN 201420151138U CN 203768307 U CN203768307 U CN 203768307U
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- condensable gas
- pressure
- light benzene
- cooler
- benzene
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Abstract
The utility model discloses a negative-pressure benzol steaming device, which comprises a benzol stripping tower, a light benzol condensation cooler, a light benzol reflux tank, a non-condensable gas cooler, a vacuum pump and a pressure pump, an outlet of the non-condensable gas cooler is connected with the vacuum pump, the light benzol condensation cooler, the light benzol reflux tank and the non-condensable gas cooler are communicated with one another through a pressure balance pipe with four ways, each way is provided with a control valve, one way is connected with the pressure pump, so that the whole device is in a negative-pressure state, the condensed light benzol condensate flows in the light benzol reflux tank by means of self gravity through adjusting the values of pressure among the light benzol condensation cooler, the light benzol reflux tank and the non-condensable gas cooler, the vacuum pump recycles non-condensable gas which is not condensed finally, no sewage is separated, and the negative-pressure benzol steaming device has the advantages of being energy-saving and environment-friendly.
Description
Technical field
The utility model relates to the technical field of steaming benzene, specifically a kind of negative pressure benzene braising device.
Background technology
In current domestic distillation de-benzene process, most coal chemical enterprises generally adopt traditional air distillation process unit.Process is: the rich oil that You Xi benzene workshop section sends here, the rich oil obtaining after two sections of poor oil-rich heat exchangers in workshop section, one section of poor oil-rich heat exchanger preheating successively enters tubular oven, entering debenzolizing tower after rich oil heating, distill de-benzene, for guaranteeing turning oil quality, after tubular oven heating, rich oil is drawn 1-1.5% and is entered revivifier, with superheated vapour, steams and blows regeneration, oil gas enters at the bottom of debenzolizing tower as de-benzene source of the gas, and residue is regularly discharged.Under normal pressure, with steam, blow steaming, when using diamond heating rich oil, pass into steam, in the time of highly energy-consuming, also producing a large amount of Separation of Waters becomes sewage.
Utility model content
The purpose of this utility model is to provide a kind of negative pressure benzene braising device, under negative pressure state by pressure equaliser is set, the separated waste water producing while avoiding carrying by steaming out under atmospheric pressure state, thus can reduce energy consumption, reduce and pollute.
The technical scheme in the invention for solving the technical problem is: a kind of negative pressure benzene braising device, comprise debenzolizing tower, light benzene condensate cooler, light benzene return tank, non-condensable gas water cooler, vacuum pump and pressure pump, the top of described debenzolizing tower connects the top entrance of described light benzene condensate cooler by light benzene steam pipeline, described light benzene condensate cooler outlet at bottom connects the input aperture of described light benzene return tank, the outlet of described light benzene return tank connects the entrance of described non-condensable gas water cooler by non-condensable gas transfer lime one, the delivery port on described light benzene condensate cooler top connects the entrance of described non-condensable gas water cooler by non-condensable gas transfer lime two, the outlet of described non-condensable gas water cooler connects described vacuum pump, described light benzene condensate cooler, light benzene return tank, between non-condensable gas water cooler three, by pressure equalizing pipe, be interconnected, described pressure equalizing pipe has four paths, on individual channel, all establish control valve, one of them path Bonding pressure pump, other three paths connect respectively described light benzene condensate cooler, light benzene return tank, non-condensable gas water cooler.
Further, the appearance at described pressure equalizing pipe is wound around the trace pipe that setting is connected with high-temperature steam.
The beneficial effects of the utility model are: the utility model does not need to use tubular oven heating rich oil to pass into high-temperature steam simultaneously simultaneously, and make whole system in negative pressure state, by pressure equalizing pipe being set between light benzene condensate cooler, light benzene return tank, non-condensable gas water cooler, three's internal pressure is regulated, make a happy circulation of path.This negative pressure benzene braising device produces required negative pressure by vacuum pump, and the pressure size that makes each equipment in device is completely contrary during with air distillation, and the light benzene liquid obtaining in device can flow to light benzene return tank certainly.Reach light benzene liquid and rely on deadweight to flow in light benzene return tank, vacuum pump reclaims the object of non-condensable gas when vacuumizing simultaneously.The mode that trace pipe adopt to be installed is incubated pressure equalizing pipe, guarantees that pipeline is unimpeded, and high-temperature steam used herein other liquid of getting along well exist contact, so can not produce the condensation waste water of pollution.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
In figure: 1 debenzolizing tower, 2 light benzene condensate coolers, 21 light benzene steam pipelines, 23 light benzene phlegma transfer limes, 24 non-condensable gas transfer limes two, 3 light benzene return tanks, 34 non-condensable gas transfer lime one, 4 non-condensable gas water coolers, 45 non-condensable gas output tubes, 5 vacuum pumps, 6 pressure equalizing pipes, 7 trace pipes, 8 pressure pumps.
Embodiment
For ease of understanding technology contents of the present utility model, below in conjunction with accompanying drawing, it is described further.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be to be also electrically connected to, and can be to be directly connected, also can indirectly be connected by intermediary, and can be the connection of two element internals.For the ordinary skill in the art, can particular case understand above-mentioned term concrete meaning in the present invention.
As shown in Figure 1, a kind of negative pressure benzene braising device, comprise debenzolizing tower 1, light benzene condensate cooler 2, light benzene return tank 3, non-condensable gas water cooler 4, vacuum pump 5 and pressure pump 8, the top of described debenzolizing tower 1 connects the top entrance of described light benzene condensate cooler 2 by light benzene steam pipeline 21, described light benzene condensate cooler 2 outlet at bottoms connect the input aperture of described light benzene return tank 3 by light benzene phlegma transfer lime 23, the outlet of described light benzene return tank 3 connects the entrance of described non-condensable gas water cooler 4 by non-condensable gas transfer lime 1, the delivery port on described light benzene condensate cooler 2 tops connects the entrance of described non-condensable gas water cooler 4 by non-condensable gas transfer lime 2 24, the outlet of described non-condensable gas water cooler 4 connects described vacuum pump 5 by non-condensable gas output tube 45, described light benzene condensate cooler 2, light benzene return tank 3, between non-condensable gas water cooler 4 threes, by pressure equalizing pipe 6, be interconnected, described pressure equalizing pipe 6 has four paths, on individual channel, all establish control valve, one of them path Bonding pressure pump 8, other three paths connect respectively described light benzene condensate cooler 2, light benzene return tank 3, non-condensable gas water cooler 4.By the size of adjusting control valve opening, the pressure in light benzene condensate cooler 2, light benzene return tank 3, non-condensable gas water cooler 4 is regulated and distributed.Appearance at described pressure equalizing pipe 6 is wound around the trace pipe 7 that setting is connected with high-temperature steam.
This negative pressure benzene braising device does not need to use tubular oven heating rich oil to pass into high-temperature steam simultaneously simultaneously.By vacuum pump 5, make whole system in negative pressure state, by between light benzene condensate cooler 2, light benzene return tank 3, non-condensable gas water cooler 4, pressure equalizing pipe being set, three's internal pressure is regulated, make the happy circulation of each path.This negative pressure benzene braising device produces required negative pressure by vacuum pump 5, the pressure size that makes each equipment in device is completely contrary during with air distillation, the light benzene liquid obtaining in device can flow to light benzene return tank 3 certainly, reaching light benzene liquid relies on deadweight to flow to light benzene backflow, in 3, vacuum pump 5 reclaims the object of non-condensable gas when vacuumizing simultaneously.The mode that trace pipe 7 adopt to be installed is incubated pressure equalizing pipe 6, can increase necessary steam soaking mouth simultaneously, guarantees that pipeline is unimpeded, and high-temperature steam used herein other liquid of getting along well exist contact, so can not produce the condensation waste water of pollution.
Comprehensive it, existing technique is to utilize the materials such as water vapor and benzene wherein, toluene can form the principle of minimum azeotropic mixture, by the benzene class material steam stripping that (do not reach the boiling point of washing oil) at a lower temperature, washing oil is regenerated.Owing to being blown into steam inevitable part aromatic hydrocarbon substance of dissolving when overhead condensation becomes water of condensation, cannot technique recycle and directly discharge, need send into waste water system, therefore, adopt steam stripping process, the generation of waste water is larger.And the technological principle that adopts negative pressure benzene removal is to rely on low voltage operated condition, reduce rich oil boiling point (boiling point under principle rich oil normal pressure) and improve the volatility of benzene class material, under lower than atmospheric operation temperature condition, benzene class material is steamed from rich oil and take off, rich oil is regenerated.Meanwhile, negative-pressure operation has improved the relative volatility between component, also has good energy-saving effect.
The technical process of negative pressure benzene removal system is: from the rich oil of washing benzene first with the oil-poor heat exchange of heat of debenzolizing tower bottom, temperature is increased to 150 to 160 ℃, and then through the heating of debenzolizing tower tube furnace convection zone, feeding temperature enters debenzolizing tower after rising to 185 to 190 ℃.Debenzolizing tower top temperature and pressure is controlled at 50 to 60 ℃, 30 to 35KPa, and tower top obtains light benzene after condensation, oily water separation, and a part is sent by pumping to trim the top of column, and a part is delivered to light benzene storage tank.At rectifying section, according to different extraction position successively extraction heavy benzol and naphtalene oil side line, through overcooling, send corresponding heavy benzol and naphtalene oil storage tank.Debenzolizing tower still temperature and pressure is controlled at 210 to 220 ℃, 40 to 45KPa, and tower reactor is established oil-poor recycle pump, oil-poorly by tube furnace circulating-heating, as thermal source, returns to tower.From the overwhelming majority of tower reactor extraction, oil-poor and raw material rich oil heat exchange, through cooling, as washing benzene washing oil, recycle again, separately have small part (1% to 3%) to send regenerator column to regenerate.Regenerator column tower top temperature and pressure-controlling are at 240 to 250 ℃, 50 to 55KPa, and regeneration tower reactor temperature is controlled at 290 to 300 ℃, 55 to 60KPa, and tower reactor adopts and the similar diamond heating of debenzolizing tower.Most of washing oil is regenerated from regeneration overhead, with gas phase form, returns to debenzolizing tower.The residual oil of tower reactor returns to the large tank of tar, is incorporated to Process of Tar Processing.
The utility model is not limited to the limited range of above-described embodiment.The improvement of any adaptation of carrying out on the utility model basis, does not all depart from thought of the present utility model, all falls in the scope of the utility model protection.
Claims (2)
1. a negative pressure benzene braising device, comprise debenzolizing tower, light benzene condensate cooler, light benzene return tank and non-condensable gas water cooler, the top of described debenzolizing tower connects the top entrance of described light benzene condensate cooler by light benzene steam pipeline, described light benzene condensate cooler outlet at bottom connects the input aperture of described light benzene return tank, the outlet of described light benzene return tank connects the entrance of described non-condensable gas water cooler by non-condensable gas transfer lime one, the delivery port on described light benzene condensate cooler top connects the entrance of described non-condensable gas water cooler by non-condensable gas transfer lime two, it is characterized in that: also comprise vacuum pump and pressure pump, the outlet of described non-condensable gas water cooler connects described vacuum pump, described light benzene condensate cooler, light benzene return tank, between non-condensable gas water cooler three, by pressure equalizing pipe, be interconnected, described pressure equalizing pipe has four paths, on individual channel, all establish control valve, one of them path Bonding pressure pump, other three paths connect respectively described light benzene condensate cooler, light benzene return tank, non-condensable gas water cooler.
2. a kind of negative pressure benzene braising device according to claim 1, is characterized in that: the appearance at described pressure equalizing pipe is wound around the trace pipe that setting is connected with high-temperature steam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420151138.7U CN203768307U (en) | 2014-03-31 | 2014-03-31 | Negative-pressure benzol steaming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420151138.7U CN203768307U (en) | 2014-03-31 | 2014-03-31 | Negative-pressure benzol steaming device |
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| Publication Number | Publication Date |
|---|---|
| CN203768307U true CN203768307U (en) | 2014-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420151138.7U Expired - Fee Related CN203768307U (en) | 2014-03-31 | 2014-03-31 | Negative-pressure benzol steaming device |
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| CN (1) | CN203768307U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109279687A (en) * | 2018-10-22 | 2019-01-29 | 佛山市精业机械制造有限公司 | A kind of system and method for the Aluminum-Extruding Die alkali cleaning and waste liquid comprehensive reutilization |
-
2014
- 2014-03-31 CN CN201420151138.7U patent/CN203768307U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109279687A (en) * | 2018-10-22 | 2019-01-29 | 佛山市精业机械制造有限公司 | A kind of system and method for the Aluminum-Extruding Die alkali cleaning and waste liquid comprehensive reutilization |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20190331 |