Coal tar advanced treatment system
阅读说明:本技术 煤焦油深度处理加工系统 (Coal tar advanced treatment system ) 是由 曾艳 苏倩 许坚 于 2020-07-30 设计创作,主要内容包括:本发明涉及煤焦油深度处理工艺技术领域,尤其是煤焦油深度处理加工系统,包括一煤焦油加热净化装置,所述煤焦油加热净化装置的出料端通过输送管路与一软沥青制备装置的进料口相连,在所述软沥青制备装置与所述煤焦油加热净化装置之间设有一硬沥青制备装置,所述输送管路的中段呈螺旋状紧密缠绕在所述硬沥青制备装置的外侧壁上。本系统针对煤焦油进行深度的加工处理使其生成所需产物:硬沥青、软沥青以及其它副产物;整体工艺相对便捷,通过煤焦油自身作为热源实现在硬沥青生产过程中的自动加热,生产更加节能环保;降温后的煤焦油再利用作为生产软沥青的原料,整体工艺设计合理,高效;能够有效的保证两种不同类型的沥青的快速生产。(The invention relates to the technical field of coal tar advanced treatment processes, in particular to a coal tar advanced treatment processing system which comprises a coal tar heating and purifying device, wherein the discharge end of the coal tar heating and purifying device is connected with the feed inlet of a soft pitch preparation device through a conveying pipeline, a hard pitch preparation device is arranged between the soft pitch preparation device and the coal tar heating and purifying device, and the middle section of the conveying pipeline is spirally and tightly wound on the outer side wall of the hard pitch preparation device. The system carries out deep processing treatment on the coal tar to ensure that the coal tar generates required products: hard asphalt, soft asphalt, and other by-products; the whole process is relatively convenient, the coal tar is used as a heat source to realize automatic heating in the production process of the hard asphalt, and the production is more energy-saving and environment-friendly; the cooled coal tar is reused as a raw material for producing the soft asphalt, and the whole process is reasonable in design and high in efficiency; can effectively ensure the rapid production of two different types of asphalt.)
1. Coal tar advanced treatment system, its characterized in that: including a coal tar heating and purifying device, coal tar heating and purifying device's discharge end passes through conveying pipeline and links to each other with a soft pitch preparation facilities's feed inlet soft pitch preparation facilities with be equipped with a hard pitch preparation facilities between the coal tar heating and purifying device, conveying pipeline's middle section is the heliciform and closely twines be used for carrying out temperature control to its inside and carry high temperature tar to its inside simultaneously on hard pitch preparation facilities's the lateral wall.
2. The coal tar advanced treatment processing system according to claim 1, characterized in that: coal tar heating purification device includes an annular heating furnace the inner chamber of annular heating furnace is the heating chamber, install the heating source in the heating chamber, the annular intracavity of annular heating furnace is filled with the coal tar a stirring purification mechanism is installed at the top in heating chamber, stirring purification mechanism is used for realizing the stirring to the coal tar and gets rid of solid impurity.
3. The coal tar advanced treatment processing system according to claim 2, characterized in that: stirring purification mechanism includes an end cover, the end cover is used for realizing the sealed of heating chamber the top center of end cover is provided with the heat insulating seat the central top fixed mounting of heat insulating seat has an agitator motor install a rotatory roof beam on agitator motor's the motor shaft the both ends of rotatory roof beam detachably respectively have linked firmly a pole setting, the bottom of pole setting closes soon and installs a filtration framework that is used for filtering coal tar internal impurity, the surface of filtering the framework is provided with a plurality of filtration pore.
4. The coal tar advanced treatment processing system according to claim 3, characterized in that: the soft asphalt preparation device comprises a two-stage evaporator, the two-stage evaporator is used for receiving coal tar from the conveying pipeline, the two-stage evaporator is used for realizing distillation to generate soft asphalt, oil gas generated by distillation of the two-stage evaporator enters a fraction tower through a pipeline to be cooled and then collected, and the soft asphalt generated by distillation of the two-stage evaporator is collected through a collecting device.
5. The coal tar advanced treatment processing system according to claim 4, characterized in that: the hard asphalt preparation device adopts a pressure reduction direct-drawing flash evaporation process to prepare hard asphalt, the hard asphalt preparation device comprises a reduced pressure distillation tower, oil gas in the reduced pressure distillation tower enters the distillation tower through a pipeline and is collected after being cooled, and liquid hard asphalt generated by the reduced pressure distillation tower is output to the outside through a discharge pipeline.
6. The coal tar advanced treatment processing system according to claim 5, characterized in that: and a cooling and temperature adjusting component is wound on the periphery of the conveying pipeline between the reduced pressure distillation tower and the second-stage evaporator and is used for realizing cooling and temperature adjustment of coal tar in the conveying pipeline at the current position.
7. The coal tar advanced treatment processing system according to claim 6, characterized in that: the cooling and temperature adjusting assembly comprises a spiral cooling pipe, the spiral cooling pipe is wound on the outer side wall of the conveying pipeline at the current position, the inlet end and the outlet end of the spiral cooling pipe are connected with an external cold source through cooling water pipes to form a circulation loop, and a circulation pump is arranged on the cooling water pipes.
8. The coal tar advanced treatment processing system according to claim 7, characterized in that: temperature sensors are respectively arranged in the annular cavity, the two-section evaporator and the reduced pressure distillation tower, and are connected with an external temperature display panel through signal wires.
9. The coal tar advanced treatment processing system according to claim 8, characterized in that: control valves are installed on all pipelines.
Technical Field
The invention relates to the technical field of coal tar advanced treatment processes, in particular to a coal tar advanced treatment processing system.
Background
Black or black brown viscous liquid with pungent odor, which is generated during coal dry distillation, is called tar for short. The coal tar can be divided into low-temperature coal tar, medium-temperature coal tar and high-temperature coal tar according to the dry distillation temperature, and the coal tar obtained in coke production belongs to high-temperature coal coke; it is one of coke oven gas purification products condensed and separated in the process of cooling crude gas.
Coal tar is a complex mixture of high-aromatic hydrocarbons, mostly polycyclic and fused cyclic compounds with or without side chains and heterocyclic compounds containing oxygen, sulfur and nitrogen, and contains a small amount of aliphatic hydrocarbons, naphthenic hydrocarbons and unsaturated hydrocarbons, as well as coal dust, coke dust and pyrolytic carbon. The coal tar just recovered also contains about 5% of water in which various inorganic salts and other impurities are dissolved.
Due to the presence of the finely divided pyrolytic carbon, water tends to form a stable emulsion with the oil. Most of the components of coal tar have high melting points, but because a large amount of monomer compounds are mutually dissolved to form a low eutectic mixture, the coal tar is still in a liquid state at normal temperature. Many of the components of coal tar also constitute a large number of multi-component azeotropic systems, which make distillation separation difficult.
Coal tar is generally used as a raw material for processing and refining to prepare various chemical products, can also be directly utilized, such as a material ingredient of a binder for industrial briquette, formed coke and coal-based activated carbon, and can also be used as a fuel oil, a blast furnace injection fuel, a wood preservative oil and a raw material for burning carbon black.
Coal tar obtained by the conventional method usually contains more impurities, the coal tar needs to be subjected to deep processing treatment when byproducts are derived and processed by utilizing the coal tar, and the main products which can be extracted after the deep processing treatment of the coal tar at present are as follows: naphthalene, phenol and homologues thereof, asphalt and other substances, wherein the asphalt belongs to a product obtained by deep processing with wider application, mainly is tar distillation residual liquid which is a mixture of various polycyclic high molecular compounds and is generally used for manufacturing roof coatings, moisture-proof layers and road building, producing asphalt coke, electric furnace electrodes and the like.
However, the existing system for producing asphalt by deeply processing coal tar is generally poor in treatment effect, and cannot meet high requirements on the purification, subsequent processing separation and classification of the asphalt produced by coal tar, so that the conditions of low yield and poor quality generally exist when the coal tar is used for producing asphalt products.
Disclosure of Invention
In order to solve one of the technical problems, the invention adopts the technical scheme that: the coal tar deep treatment processing system comprises a coal tar heating and purifying device, wherein the discharge end of the coal tar heating and purifying device is connected with a feed inlet of a soft pitch preparation device through a conveying pipeline, a hard pitch preparation device is arranged between the soft pitch preparation device and the coal tar heating and purifying device, and the middle section of the conveying pipeline is spirally and tightly wound on the outer side wall of the hard pitch preparation device and is used for controlling the temperature of the interior of the hard pitch preparation device and conveying high-temperature tar to the interior of the hard pitch preparation device; the output end of the soft asphalt preparation device is connected with the soft asphalt collecting device, and the output end of the hard asphalt preparation device is connected with the hard asphalt collecting device.
Preferably, coal tar heating purification device includes an annular heating furnace the inner chamber of annular heating furnace is the heating chamber, install the heating source in the heating chamber, the annular intracavity of annular heating furnace is filled with the coal tar a stirring purification mechanism is installed at the top in heating chamber, stirring purification mechanism is used for realizing the stirring to the coal tar and getting rid of solid impurity.
Preferably, stirring purification mechanism includes an end cover, the end cover is used for realizing the sealed of heating chamber the top center of end cover is provided with the heat insulating seat the central top fixed mounting of heat insulating seat has an agitator motor install a rotatory roof beam on agitator motor's the motor shaft the both ends of rotatory roof beam detachably respectively have linked firmly a pole setting, the bottom of pole setting closes soon and installs a filtration framework that is used for filtering the inside impurity of coal tar, the surface of filtering the framework is provided with a plurality of filtration pore.
Preferably, the maltha preparation device comprises a second-stage evaporator, the second-stage evaporator is used for receiving coal tar from the conveying pipeline, the second-stage evaporator is used for realizing distillation to generate maltha, oil gas generated by the distillation of the second-stage evaporator enters a fraction tower through a pipeline to be cooled and then collected, and the maltha generated by the distillation of the second-stage evaporator is collected through a collecting device.
Preferably, the hard asphalt preparation device adopts a pressure reduction direct-drawing flash evaporation process to prepare hard asphalt, the hard asphalt preparation device comprises a reduced pressure distillation tower, oil gas in the reduced pressure distillation tower enters the fractionating tower through a pipeline to be cooled and then collected, and liquid hard asphalt generated by the reduced pressure distillation tower is output to the outside through a discharge pipeline.
Preferably, a cooling and temperature adjusting assembly is wound on the periphery of the conveying pipeline between the reduced pressure distillation tower and the second-stage evaporator, and the cooling and temperature adjusting assembly is used for realizing cooling and temperature adjustment of coal tar in the conveying pipeline at the current position.
Preferably, the cooling and temperature regulating assembly comprises a spiral cooling pipe, the spiral cooling pipe is wound on the outer side wall of the conveying pipeline at the current position, the inlet end and the outlet end of the spiral cooling pipe are both connected with an external cold source through a cooling water pipe to form a circulation loop, and a circulation pump is arranged on the cooling water pipe.
Preferably, temperature sensors are installed inside the annular cavity, the two-stage evaporator and the reduced pressure distillation tower, and each temperature sensor is connected with an external temperature display panel through a signal line.
Preferably, a control valve is installed on each pipeline.
The invention has the beneficial effects that: the system carries out deep processing treatment on the coal tar to ensure that the coal tar generates required products: hard asphalt, soft asphalt, and other by-products; the whole process is relatively convenient, the coal tar is used as a heat source to realize automatic heating in the production process of the hard asphalt, and the production is more energy-saving and environment-friendly; the cooled coal tar is reused as a raw material for producing the soft asphalt, and the whole process is reasonable in design and high in efficiency; can effectively ensure the rapid production of two different types of asphalt.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or components are generally identified by like reference numerals. In the drawings, elements or components are not necessarily drawn to scale.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partially enlarged schematic view of the present invention.
In the figure, 1, a coal tar heating and purifying device; 101. an annular heating furnace; 102. a heating cavity; 103. a heating source; 104. coal tar; 2. a delivery line; 3. a maltene preparation device; 301. a second stage evaporator; 302. a distillation column; 4. a hard asphalt preparation device; 401. a reduced pressure distillation column; 402. a discharge line; 5. a stirring and purifying mechanism; 501. an end cap; 502. a heat insulating base; 503. a stirring motor; 504. a rotating beam; 505. erecting a rod; 506. a filter frame body; 507. filtering holes; 6. cooling the temperature regulating assembly; 601. a spiral cooling tube; 602. a cooling water pipe; 603. an external cold source; 604. and a circulating pump.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1-2, the coal tar advanced treatment processing system comprises a coal tar heating and purifying device 1, wherein a discharge end of the coal tar heating and purifying device 1 is connected with a feed inlet of a soft pitch preparation device 3 through a
Coal tar heating and purifying device 1 can be quick realize the heating to raw
The system can simultaneously realize the simultaneous production of the soft asphalt and the hard asphalt, the production process is relatively simple, and the performance of the obtained product is relatively excellent; meanwhile, the oil gas and impurities can be rapidly collected.
Preferably, the coal tar heating and purifying device 1 comprises an
Thereby can realize raising the temperature of the
Preferably, the stirring and purifying
The stirring
Preferably, the maltha preparation device 3 comprises a secondary evaporator 301, the secondary evaporator 301 is used for receiving the
And (2) after the tar with proper temperature is sent into a two-stage evaporator 301, distilling is carried out, the distillation temperature is kept at 220-300 ℃, the distillation time is kept for 5-40 minutes, the maltha is generated, oil gas in the distillation process is cooled by a fraction tower 302 and then collected, and the maltha is sent into a collector to obtain the maltha.
Preferably, the stiff asphalt preparation device 4 adopts a reduced pressure direct distillation flash process to prepare stiff asphalt, the stiff asphalt preparation device 4 comprises a reduced pressure distillation tower 401, oil gas in the reduced pressure distillation tower 401 enters the fractionating tower 302 through a pipeline to be cooled and collected, and liquid stiff asphalt generated by the reduced pressure distillation tower 401 is output to the outside through a discharge pipeline 402.
The control parameters in the pressure reduction direct-drawing flash evaporation process are as follows:
direct drawing and pressure reduction: 1.5kpa to 7.5kpa, reduced pressure vapor phase temperature: at temperature of 270 ℃ and 390 ℃, converting to normal pressure temperature: 420 ℃ and 500 ℃, and the flash time is 5-30 minutes.
Preferably, a cooling and temperature adjusting assembly 6 is wound on the periphery of the conveying
When the temperature of the
Preferably, the cooling and temperature adjusting assembly 6 includes a spiral cooling pipe 601, the spiral cooling pipe 601 is wound on the outer side wall of the conveying
Preferably, temperature sensors are installed inside the annular cavity, the two-stage evaporator 301 and the vacuum distillation tower 401, and each temperature sensor is connected with an external temperature display panel through a signal line.
Preferably, a control valve is installed on each pipeline.
Coal tar heating and purifying device 1 can be quick realize the heating to raw
The system can simultaneously realize the simultaneous production of the soft asphalt and the hard asphalt, the production process is relatively simple, and the performance of the obtained product is relatively excellent; meanwhile, the oil gas and impurities can be rapidly collected.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention, and the technical solutions are all covered in the scope of the claims and the specification of the present invention; it will be apparent to those skilled in the art that any alternative modifications or variations to the embodiments of the present invention may be made within the scope of the present invention.
The present invention is not described in detail, but is known to those skilled in the art.
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