CN211522120U

CN211522120U - Heavy benzene processing system

Info

Publication number: CN211522120U
Application number: CN201921648450.6U
Authority: CN
Inventors: 许垒; 史争光; 张建宁; 周涛; 李江; 李玉川
Original assignee: Henan Bohai Chemical Co ltd
Current assignee: Henan Bohai Chemical Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-09-18
Anticipated expiration: 2029-09-30

Abstract

The utility model relates to a coal tar deep-processing technical field, concretely relates to heavy benzol system of processing, including two-stage process evaporimeter, heavy benzol backward flow groove, heavy benzol pump and anthracene oil backward flow entry, the heavy benzol backward flow groove is connected to the suction end of heavy benzol pump, and its output passes through backflow pipeline and connects anthracene oil backward flow entry, the top at two-stage process evaporimeter is seted up to anthracene oil return entry. The utility model discloses a heavy benzol replaces the anthracene oil backward flow, and the one hand fractionates the raw materials heavy benzol, has increased the fractional distillation efficiency of tar processing, and on the other hand has avoided appearing the pipeline jam that can't dissolve once more and lead to, scrapping problem because of thick anthracene crystallization.

Description

Heavy benzene processing system

Technical Field

The utility model relates to a coal tar deep-processing technology field, concretely relates to heavy benzol system of processing.

Background

The original tar processing device can only process raw material coal tar, the top of the second-stage evaporator uses anthracene oil to carry out reflux so as to control the top temperature of the second-stage evaporator and the quality of mixed oil gas, crude anthracene can be crystallized and separated out when the temperature of the anthracene oil is lower than 70 ℃, and once the crude anthracene is crystallized and separated out, the crude anthracene can not be dissolved again, the whole section of pipeline can be completely scrapped due to blockage, and further the production reduction or the shutdown can be caused.

In addition, the original anthracene oil reflux system adopts the original substance distilled from tar to carry out reflux, which is equivalent to that the produced product is re-mixed back to the system, thereby reducing the effect of tar distillation to a certain extent.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a heavy benzol system of processing adopts heavy benzol to replace the anthracene oil backward flow, fractionates raw materials heavy benzol on the one hand, has increased the fractional distillation efficiency of tar processing, and on the other hand has avoided appearing the pipeline that can't dissolve once more and lead to and has blockked up, scrap the problem because of crude anthracene crystallization.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides a heavy benzol system of processing, is including two-stage process evaporimeter, heavy benzol backward flow groove, heavy benzol pump and anthracene oil backward flow entry, the heavy benzol backward flow groove is connected to the suction end of heavy benzol pump, and its output passes through return line and connects anthracene oil backward flow entry, the top at two-stage process evaporimeter is seted up to anthracene oil backward flow entry.

As an improvement: the heavy benzene pump is connected with a variable frequency controller, and the variable frequency controller is connected with a controller.

The specific implementation mode is as follows:

step S1, replacing the anthracene oil raw material in the anthracene oil reflux system with heavy benzene;

step S2: heavy benzene is conveyed into a two-section evaporator from a heavy benzene reflux tank through a reflux pipeline and an anthracene oil reflux inlet in sequence through a heavy benzene pump;

step S3: the controller controls the operation of the heavy benzene pump through the variable frequency controller to realize the control of the flow of the heavy benzene in the return pipeline, and further realize the control of the top mixed oil gas quality of the two-section evaporator and the tower top temperature of the two-section evaporator.

To sum up, the utility model discloses following technological effect has:

1. heavy benzene is adopted to replace anthracene oil for backflow, so that the problems of pipeline blockage and scrapping caused by the fact that crude anthracene crystals are separated out and cannot be dissolved again are solved, and the problem of unplanned yield reduction or shutdown caused by pipeline blockage is further solved;

2. the heavy benzene pump is controlled by frequency conversion, so that the quality of the top mixed oil gas of the two-stage evaporator and the tower top temperature of the two-stage evaporator can be accurately controlled;

3. the heavy benzene is naturally separated in the two-stage evaporator according to different distillation ranges of the heavy benzene, the heavy benzene is processed while tar is processed, the distilled substance of the tar does not need to be refluxed again, the heavy benzene processing capacity is increased on the basis of the capacity of the original tar processing device, and a tower, a circulating pump, a heating furnace, a reflux pump and the like are needed to be added to a newly-built heavy benzene processing device.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the description of the prior art will be briefly described below.

FIG. 1 is a schematic diagram of a heavy benzene processing system connection;

FIG. 2 is a flow diagram of a heavy benzene processing method;

FIG. 3 is a schematic diagram of a connection of a variable frequency controller;

wherein: 1. a second stage evaporator; 2. heavy benzol reflux tank; 3. a heavy benzene pump; 4. an anthracene oil reflux inlet; 5. and (4) a return pipeline.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, a heavy benzene processing system includes a two-stage evaporator 1, a heavy benzene reflux tank 2, a heavy benzene pump 3 and an anthracene oil reflux inlet 4, wherein a suction end of the heavy benzene pump 3 is connected to the heavy benzene reflux tank 2, an output end thereof is connected to the anthracene oil reflux inlet 4 through a reflux pipeline 5, the anthracene oil reflux inlet is disposed at a top of the two-stage evaporator 1, the heavy benzene pump 3 is connected to a frequency conversion controller, and the frequency conversion controller is connected to a controller.

Referring to fig. 2 and fig. 3, in the present embodiment, the anthracene oil raw material in the anthracene oil reflux system is replaced by heavy benzene; heavy benzene is conveyed into a two-section evaporator 1 by a heavy benzene pump 3 from a heavy benzene reflux tank 2 through a reflux pipeline 5 and an anthracene oil reflux inlet 4 in sequence; the controller controls the operation of the heavy benzene pump 3 through the variable frequency controller, realizes the control of the flow of the heavy benzene in the return pipeline 5, and further realizes the control of the top mixed oil gas quality of the two-stage evaporator 1 and the tower top temperature of the two-stage evaporator 1.

In the embodiment, the heavy benzene is adopted to replace the return of anthracene oil, so that the problems of pipeline blockage and scrappage caused by the fact that crude anthracene crystals are separated out and cannot be dissolved again are avoided, and the problem of unplanned yield reduction or shutdown caused by pipeline blockage is further avoided; the heavy benzene pump 3 adopts frequency conversion control, and can accurately realize the top mixed oil gas quality of the two-stage evaporator 1 and the top temperature control of the two-stage evaporator 1.

Heavy benzene is naturally separated in the two-stage evaporator 1 according to the distillation range difference of the heavy benzene itself, various products such as asphalt, tertiary mixed oil, anthracene oil and the like are separated, the heavy benzene is processed while tar is processed, and the substances distilled from the tar do not need to be refluxed again, for example: originally, 500 tons of tar are processed every day, after the heavy benzene is added, 500 tons of tar are processed every day, simultaneously, 20 tons of heavy benzene is processed, and a heavy benzene distillation production line is not required to be added.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will appreciate that; the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims

1. The utility model provides a heavy benzol system of processing which characterized in that, including two-stage evaporator, heavy benzol backward flow groove, heavy benzol pump and anthracene oil backward flow entry, the heavy benzol backward flow groove is connected to the suction end of heavy benzol pump, and its output passes through backflow pipeline and connects anthracene oil backward flow entry, anthracene oil return entry is seted up at the top of two-stage evaporator.

2. The heavy benzene processing system of claim 1, wherein the heavy benzene pump is connected to a variable frequency controller, the variable frequency controller being connected to a controller.