CN210206264U

CN210206264U - Treatment device for tar processing asphalt smoke

Info

Publication number: CN210206264U
Application number: CN201920840693.3U
Authority: CN
Inventors: Yuqian Zhu; 朱玉倩; Ping Guo; 郭平; Hui Li; 李辉; Qinglong Guo; 郭青龙; Da Li; 李达
Original assignee: Lin Huan Coking Limited-Liability Co
Current assignee: Lin Huan Coking Limited-Liability Co; Linhuan Coking and Chemical Co Ltd
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2020-03-31
Anticipated expiration: 2029-06-05

Abstract

The utility model discloses a treatment device of tar processing pitch flue gas belongs to tar processing technology field, the flue gas cleaner passes through the pipeline and is connected with the wash oil groove, the setting of exhaust cleaner is connected with the wash oil groove on the wash oil groove, the exhaust cleaner passes through the pipeline and is connected with flue gas preheater, set up exhaust fan on the connecting tube of exhaust cleaner and flue gas preheater, flue gas preheater passes through the pipeline and burns burning furnace and be connected, it passes through the pipeline and is connected with the conduction oil heat exchanger to burn burning furnace, the conduction oil heat exchanger passes through the pipeline and is trained the level with flue gas preheater, let in auxiliary fuel and air auxiliary combustion in the burning furnace. The utility model discloses a treatment device of tar processing pitch flue gas adopts the purification technology that absorption method and burning method combined together, has both avoided the not high shortcoming of absorption method purification efficiency, simultaneously, because most harmful substance in the wash oil absorption has removed the pitch flue gas, has reduced the load that burns burning furnace to reduce auxiliary fuel's consumption.

Description

Treatment device for tar processing asphalt smoke

Technical Field

The utility model relates to a tar processing technology field, specifically speaking, the utility model relates to a control device of tar processing pitch flue gas.

Background

Tar processing is a traditional high-pollution industry, and a large amount of toxic asphalt smoke is generated in the asphalt production, storage and transportation processes, so that human bodies and animals are injured. The asphalt smoke contains benzo (a) pyrene, has extremely strong carcinogenicity, and can cause diseases of respiratory tract, skin and the like and induce cancers if being in an environment polluted by the asphalt smoke for a long time. In order to effectively treat and control the pollution of asphalt smoke, the emission standard of atmospheric pollutants has clear text regulation on the emission of industrial asphalt smoke, and the maximum allowable emission concentration of the asphalt smoke is 40mg/m for a newly-built tar processing plant³The maximum allowable emission concentration of benzo (a) pyrene is 0.3X 10 mg/m³. Therefore, how to effectively treat the asphalt smoke to reach the national emission standard becomes a problem which must be solved by the tar processing industry.

The asphalt smoke generated by processing the tar is complex in components, similar to the components of the asphalt, and mainly comprises low-carbon hydrocarbon, polycyclic aromatic hydrocarbon, heterocyclic compounds of nitrogen and sulfur, and the like. The asphalt smoke consists of gas phase and liquid phase, the liquid phase part is a very fine volatile condensate with the particle size of 0.1-1.0 mu m, the gas phase is a mixture of different gases, and the apparent form is very dispersed smoke with low concentration. In addition, most of asphalt flue gas is asphalt steam which is easy to adhere to flue gas pipelines and equipment walls to form irregular solid which is difficult to remove, so that the pipelines and the equipment are blocked, and normal production is influenced.

Disclosure of Invention

The utility model provides an asphalt flue gas treatment process combining an absorption method and a burning method, which has the advantages of operability, lower cost, good purification effect and actual production according with tar processing.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a treatment device for tar processing asphalt smoke, which comprises a smoke cleaner, an oil washing groove, an exhaust cleaner, an incinerator, a heat transfer oil heat exchanger and a smoke preheater, the device comprises a flue gas cleaner, an exhaust cleaner, a heat-conducting oil heat exchanger, a flue gas preheater, an air blower, an asphalt flue gas cleaner, a waste gas pipeline and a flue gas preheater, wherein the flue gas cleaner is connected with an oil washing groove through a pipeline; the washing oil tank is connected with the washing oil pump through a pipeline, the washing oil pump is connected with the cooling water pipeline through a pipeline, the washing oil pump works to pump out waste washing oil through a waste washing oil pipe, and the washing oil tank is filled with new washing oil through a pipeline.

Preferably, the incinerator is a direct-fired incinerator.

Adopt the technical scheme of the utility model, can obtain following beneficial effect:

the utility model discloses a treatment device of tar processing pitch flue gas adopts the purification technology that absorption method and burning method combined together, has both avoided the not high shortcoming of absorption method purification efficiency, simultaneously, because most harmful substance in the wash oil absorption has removed the pitch flue gas, has reduced the load that burns burning furnace to reduce auxiliary fuel's consumption. Meanwhile, the asphalt flue gas has the characteristic of easy adhesion, most asphalt steam in the flue gas is absorbed by the washing oil through the exhaust cleaning system, so that the subsequent flue gas pipeline and equipment of the cleaning tower can be prevented from being blocked, and the production stability is improved.

Drawings

The contents of the description and the references in the drawings are briefly described as follows:

FIG. 1 is a schematic diagram of the structure of the apparatus;

the labels in the above figures are: 1. a flue gas cleaner; 2. an oil washing tank; 3. an exhaust washer; 4. a flue gas preheater; 5. a heat transfer oil heat exchanger; 6. an incinerator; 7. an exhaust fan; 8. an air blower; 9. an oil washing pump; 10. a cooling water pipeline; 11. an exhaust gas conduit.

Detailed Description

The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings, in which the shapes, structures, mutual positions and connection relationships of the respective members, the functions of the respective portions, the operation principles, and the like of the respective members are described.

As shown in fig. 1, a flue gas cleaner 1 of the treatment device for tar processing asphalt flue gas is connected with an oil washing tank 2 through a pipeline, an exhaust gas cleaner 3 is arranged on the oil washing tank 2 and connected with the oil washing tank 2, the exhaust gas cleaner 3 is connected with a flue gas preheater 4 through a pipeline, an exhaust fan 7 is arranged on a connecting pipeline of the exhaust gas cleaner 3 and the flue gas preheater 4, the flue gas preheater 4 is connected with an incinerator 6 through a pipeline, the incinerator 6 is connected with a heat-conducting oil heat exchanger 5 through a pipeline, the heat-conducting oil heat exchanger 5 is connected with the flue gas preheater 4 through a pipeline, auxiliary fuel and air are introduced into the incinerator 6 to assist combustion, air is blown in through an air fan 8, asphalt flue gas is connected with the flue gas cleaner 1 through a pipeline, a waste gas pipeline 11 is connected with the flue gas preheater 4 to discharge waste gas, and the waste gas can preheat the; the oil washing tank 2 is connected with the oil washing pump 9 through a pipeline, the oil washing pump 9 is connected with the cooling water pipeline 10 through a pipeline, the oil washing pump 9 works to pump waste washing oil out through a waste washing oil pipe, and the oil washing tank 2 is filled with new washing oil through a pipeline.

When the device is used, an exhaust cleaning system is arranged in an area where asphalt smoke of a tar processing enterprise is concentrated, the asphalt smoke of each device in the area is concentrated to a smoke cleaner 1 and is fully mixed with washing oil, the washed smoke enters a washing oil tank 2 for gas-liquid separation, noncondensable gas enters an exhaust cleaning device 3, and the noncondensable gas is washed by the washing oil again and is pumped to an incineration system by an exhaust fan 7. The wash oil in the wash oil tank 2 is pumped by the wash oil pump 9, one part is sent to the flue gas scrubber 1, and the other part is sent to the exhaust gas scrubber 3. The wash oil is changed irregularly depending on the washing effect.

And the asphalt flue gas from the exhaust cleaning system enters an incineration system for incineration. The asphalt flue gas enters a flue gas preheater 4 for preheating, then enters a direct-fired incinerator 6 for oxidative decomposition, and high-temperature waste gas generated by combustion sequentially passes through a heat-conducting oil heat exchanger 5 and the flue gas preheater 4 for recovering waste heat and then is discharged into the atmosphere. The heat generated by the combustion of the auxiliary fuel maintains the temperature of the combustion chamber of the incinerator 6 at 900-1100 ℃ to ensure that polycyclic aromatic hydrocarbons such as benzo (a) pyrene in the asphalt smoke are thoroughly decomposed into CO₂And H₂And O, so as to achieve the aim of harmless emission.

The treatment device has the following process characteristics:

(1) the purification process combining the absorption method and the incineration method not only avoids the defect of low purification efficiency of the absorption method, but also reduces the load of the incinerator due to the fact that most harmful substances in asphalt smoke are removed by washing oil absorption, thereby reducing the consumption of auxiliary fuel.

(2) The washing oil is adopted as the absorbent, has good dissolubility for each component in the asphalt smoke and high purification efficiency. The tar processing enterprises do not need to purchase washing oil because the washing oil is produced by the tar processing enterprises. The waste washing oil is sent back to the tar distillation unit and can also be used as a raw material for processing tar.

(3) The asphalt flue gas has the characteristic of easy adhesion, most asphalt steam in the flue gas is absorbed by the washing oil through the exhaust cleaning system, so that the subsequent flue gas pipeline and equipment of the cleaning tower can be prevented from being blocked, and the production stability is improved.

(4) The direct combustion type incinerator is adopted, the temperature of a combustion chamber is maintained at about 1000 ℃, and at the temperature, polycyclic aromatic hydrocarbons such as benzo (a) pyrene and the like in asphalt smoke are thoroughly decomposed into CO₂And H₂O, the flue gas purification rate is more than or equal to 99 percent, thereby achieving the aim of harmless emission.

(5) The heat-conducting oil heat exchanger and the smoke preheater are arranged behind the incinerator, so that the waste heat of high-temperature waste gas is recovered, and the heat efficiency of the incinerator is improved. The asphalt flue gas is preheated by the flue gas preheater, and the temperature is raised from 60 ℃ to 150 ℃ and then enters the incinerator for combustion, so that the consumption of auxiliary fuel can be reduced. The heat transfer oil can be used as a heating medium for processing each distillation tower reboiler from tar after heat exchange through the heat transfer oil heat exchanger.

Under the normal operation condition after the device is used, the asphalt smoke generated by tar processing enterprises is absorbed by washing oil and burnt by the incinerator, and the emission concentration and the emission rate of each pollutant reach the secondary emission standard of the comprehensive emission standard of atmospheric pollutants.

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements can be made without modification to the method and technical solution of the present invention, or the present invention can be directly applied to other occasions without modification, all within the scope of the present invention.

Claims

1. The utility model provides a harnessing device of tar processing pitch flue gas which characterized in that: the device comprises a flue gas cleaner, an oil washing tank, an exhaust cleaner, an incinerator, a heat transfer oil heat exchanger and a flue gas preheater, wherein the flue gas cleaner is connected with the oil washing tank through a pipeline;

the washing oil tank is connected with the washing oil pump through a pipeline, the washing oil pump is connected with the cooling water pipeline through a pipeline, the washing oil pump works to pump out waste washing oil through a waste washing oil pipe, and the washing oil tank is filled with new washing oil through a pipeline.

2. The tar processing asphalt smoke treatment device according to claim 1, characterized in that: the incinerator is a direct-fired incinerator.