阅读说明：本技术 一种采用升降机实现液体沥青自流卸车的系统及方法 (System and method for realizing self-flow unloading of liquid asphalt by adopting elevator ) 是由 杨雪松 于 2019-11-01 设计创作，主要内容包括：本发明涉及一种采用升降机实现液体沥青自流卸车的系统及方法,所述系统包括高架操作平台、升降井、升降机、沥青输送管道、氮气输送管道及沥青储槽；装载液体沥青的汽车槽车卸车时位于升降机上并随升降台升降；汽车槽车上的液体沥青出口管通过汽车卸料臂及沥青输送管道连接沥青储槽,汽车槽车上的氮气入口管通过金属软管与氮气输送管道连接；以汽车槽车与沥青储槽之间的高度差为主动力,以氮气背压为辅助动力,使液体沥青自流进入沥青储槽中。卸车完成后对液体沥青输送管道自动进行氮气吹扫,管道内的残留沥青按斜度全部放空到沥青储槽,系统操作方便,无需维护。(The invention relates to a system and a method for realizing self-flow unloading of liquid asphalt by adopting a lifter, wherein the system comprises an overhead operation platform, a lifting well, the lifter, an asphalt conveying pipeline, a nitrogen conveying pipeline and an asphalt storage tank; when the automobile tank car loaded with the liquid asphalt is unloaded, the automobile tank car is positioned on the lifter and lifted along with the lifting platform; a liquid asphalt outlet pipe on the automobile tank car is connected with an asphalt storage tank through an automobile discharging arm and an asphalt conveying pipeline, and a nitrogen inlet pipe on the automobile tank car is connected with a nitrogen conveying pipeline through a metal hose; the height difference between the automobile tank car and the asphalt storage tank is used as main power, and nitrogen backpressure is used as auxiliary power, so that the liquid asphalt automatically flows into the asphalt storage tank. After unloading, nitrogen purging is automatically carried out on the liquid asphalt conveying pipeline, residual asphalt in the pipeline is completely discharged to an asphalt storage tank according to the inclination, the system is convenient to operate, and maintenance is not needed.)

1. A system for realizing self-flow unloading of liquid asphalt by adopting a lifter is characterized by comprising an overhead operation platform, a lifting well, the lifter, an asphalt conveying pipeline, a nitrogen conveying pipeline and an asphalt storage tank; the overhead operation platform is higher than the asphalt storage tank, an automobile discharging arm and a metal hose are arranged on the overhead operation platform, a lifting well is arranged between the overhead operation platform and the ground, a lifter is arranged in the lifting well, and a lifting platform at the top of the lifter can lift between the bottom of the lifting well and the top surface of the overhead operation platform; when the automobile tank car loaded with the liquid asphalt is unloaded, the automobile tank car is positioned on the lifter and lifted along with the lifting platform; a liquid asphalt outlet pipe on the automobile tank car is connected with an asphalt storage tank through an automobile discharging arm and an asphalt conveying pipeline, and a nitrogen inlet pipe on the automobile tank car is connected with a nitrogen conveying pipeline through a metal hose; the height difference between the automobile tank car and the asphalt storage tank is used as main power, and nitrogen backpressure is used as auxiliary power, so that the liquid asphalt automatically flows into the asphalt storage tank.

2. The system for realizing self-flow unloading of liquid asphalt by using an elevator as claimed in claim 1, wherein the liquid asphalt outlet pipe of the car tank car is connected with one end of the car discharging arm through a quick connector I, the other end of the car discharging arm is connected with the asphalt storage tank through an asphalt conveying pipeline, a first electromagnetic valve is arranged on the asphalt conveying pipeline close to one end of the car discharging arm, and a temperature recording interlocking alarm instrument is arranged on the asphalt conveying pipeline close to one end of the asphalt storage tank.

3. The system for realizing the self-flow unloading of the liquid asphalt by the elevator as claimed in claim 1 or 2, wherein the top of the asphalt storage tank is provided with a diffused air pipe which is connected with an external diffused air recovery processing system through a diffused air main pipe.

4. The system for realizing self-flow unloading of liquid asphalt by using the elevator as claimed in claim 1, wherein a nitrogen inlet pipe on the car tank car is connected with one end of a metal hose through a second quick connector, the other end of the metal hose is connected with a nitrogen conveying pipeline, a throttle orifice plate, a self-operated regulating valve and a second electromagnetic valve are sequentially arranged on the nitrogen conveying pipeline along the nitrogen conveying direction, and the second electromagnetic valve is interlocked with a temperature recording interlocking alarm instrument arranged on the asphalt conveying pipeline for control.

5. The system for realizing self-flow unloading of liquid asphalt by using the elevator as claimed in claim 1, wherein the liquid asphalt outlet pipe and the nitrogen inlet pipe are respectively provided with a manual valve.

6. The system for achieving self-flow unloading of liquid asphalt by using the elevator as claimed in claim 1, wherein the elevator is a hydraulic elevator.

7. A method for realizing self-flow unloading of liquid asphalt by using an elevator based on the system of any one of claims 1-6, which is characterized by comprising the following steps:

1) when the elevator is at an initial position, the top surface of the lifting platform at the top of the elevator is flush with the ground, an automobile tank car carrying liquid asphalt is parked after running to a specified position on the elevator, the elevator is started, the automobile tank car rises along with the lifting platform of the elevator, and stops rising after the lifting platform rises to the height that the top surface of the automobile tank car is flush with the top surface of the overhead operation platform, and the automobile tank car is confirmed to be in place and is ready to be unloaded;

2) when unloading, connecting the nitrogen conveying pipeline with a nitrogen inlet pipe on the automobile tank car through the second quick connector and the metal hose, connecting an automobile unloading arm with a liquid asphalt outlet pipe on the automobile tank car through the first quick connector, and opening manual valves on the nitrogen inlet pipe and the liquid asphalt outlet pipe to start automatic unloading; opening a first electromagnetic valve on an asphalt conveying pipeline, and enabling liquid asphalt to flow out of an automobile tank car; opening the second electromagnetic valve, limiting the flow of nitrogen through the throttling orifice plate, reducing the pressure through the self-operated regulating valve, pressurizing the automobile tank wagon, and enabling the liquid asphalt to quickly flow into an asphalt storage tank in a self-flow mode under the auxiliary action of nitrogen back pressure by taking the height difference as main power;

3) after unloading is finished, nitrogen enters the asphalt conveying pipeline to automatically perform nitrogen purging due to no liquid seal of liquid asphalt, and residual liquid asphalt in the asphalt conveying pipeline is completely discharged into an asphalt storage tank according to the inclination; the nitrogen flow of nitrogen purging at the later stage is limited by the flow-limiting pore plate, so that the over-quick pressurization of the diffusing gas main pipe is avoided; the temperature of the asphalt conveying pipeline after nitrogen purging is reduced, when the temperature displayed by the temperature recording interlocking alarm instrument reaches the set temperature lower limit, the first electromagnetic valve is closed, then the second electromagnetic valve is closed, and purging is finished;

4) closing manual valves on a nitrogen inlet pipe and a liquid asphalt outlet pipe, disconnecting the first quick connector and the second quick connector, starting a lifter, and stopping the automobile tanker descending to the ground along with a lifting platform of the lifter; and the automobile tank car is driven away from the shaft to prepare for next unloading.

8. The method for achieving self-flow unloading of liquid asphalt by using the elevator as claimed in claim 7, wherein the nitrogen source of the nitrogen conveying pipeline is 4 kg of nitrogen, and the flow is limited to 100Nm by the throttling orifice plate³And after the pressure is reduced to 2 kilograms by a self-operated regulating valve, the automobile tank car is pressurized.

9. The method for achieving self-flow unloading of liquid asphalt by using an elevator according to claim 7, wherein the lower set temperature limit is 100 ℃.

10. The method of claim 7, wherein the liquid asphalt comprises upgraded asphalt or medium temperature asphalt.

Technical Field

The invention relates to the technical field of liquid asphalt conveying, in particular to a system and a method for realizing self-flow unloading of liquid asphalt by adopting a lifter.

Background

About 50 to 60 percent of medium temperature pitch is generally generated in the coal tar processing process, belongs to a bulk product of tar processing, and modified pitch is a main downstream product of the current medium temperature pitch and is mainly used for producing prebaked anodes, preparing battery rods or electrode binders in the electrolytic aluminum industry.

The medium temperature asphalt and modified asphalt products produced in China are generally purchased and sold by solid asphalt solidified, cooled and molded by asphalt, and the liquid asphalt is sold by adopting a liquid automobile tank car transportation mode as an auxiliary, because the yield of the tar is huge every year in China (for example, the yield of the tar is 1500 ten thousand tons in 2016 years and the yield of the asphalt is more than 800 ten thousand tons), the sales volume of the asphalt products is huge, and the purchasing and selling modes of the asphalt are very important.

From the consideration of buyers, the solid asphalt solidified, cooled and molded by asphalt is purchased, a solid asphalt melting tank needs to be added for heating and melting the solid asphalt, a large amount of heat energy needs to be consumed, and a solid asphalt storage warehouse and loading and unloading equipment need to be built, so that the investment is large, the running cost is high, and the occupied area is wide; the liquid asphalt is purchased by adopting a liquid automobile tank car transportation mode, so that the investment is low, the occupied area is small, the operation cost is low, and the method is a very efficient and energy-saving purchasing mode. However, this is not currently used in large numbers for the following reasons:

only from the perspective of buyers, the conventional automobile tank car unloading process adopted by liquid asphalt is that the liquid asphalt is unloaded to an underground unloading tank through a metal hose and then is fed to an asphalt storage tank through an underwater delivery pump, the unloading environment is not good, the unloading speed of the liquid asphalt which is unloaded to the underground unloading tank through the metal hose is very slow, the key equipment of the whole process is a liquid asphalt underwater delivery pump which contains solid suspended substances such as polymers and the like due to the characteristics of the liquid asphalt, the viscosity of the liquid asphalt is high, the liquid asphalt is easy to solidify, the softening point is as high as over 105 ℃, the impeller of the liquid asphalt underwater delivery pump is easy to wear, particularly, the automobile tank car unloading process of the liquid asphalt is operated intermittently, after the liquid asphalt underwater delivery pump is fed, an asphalt pipeline can be blown and cleaned, but the liquid asphalt underwater delivery pump cannot be cleaned and maintained, due to the characteristics of the submerged pump, the underground unloading tank cannot be empty, a certain liquid level needs to be maintained, liquid asphalt is guaranteed to be liquid all the time, the asphalt is heated for a long time, the asphalt is easy to become viscous, the liquid asphalt submerged delivery pump is difficult to restart, if the blade of the liquid asphalt submerged delivery pump is seriously abraded or other faults occur, the cleaning and maintenance are very complicated, and the operation condition is very severe; if the aboveground unloading is adopted, namely the aboveground asphalt unloading pump is adopted to directly convey liquid asphalt of a tank car to an asphalt storage tank, the liquid asphalt unloading pump generally needs to introduce equipment, the cost is high, the same problems as the liquid asphalt submerged conveying pump exist, namely the maintenance cost is high, the operation conditions are very poor, and the liquid asphalt does not become the mainstream of the current product purchase. In addition, the unloading process is incomplete, and the operation and maintenance are complicated and troublesome from the point of view of the buyer, which is also very important reason.

In summary, the liquid asphalt tank car unloading process is urgently needed to solve the problem that under the condition of intermittent operation, the whole tank car unloading process can be operated simply and smoothly every time when the tank car is unloaded, so that the complex equipment, the complex maintenance, the simple operation and the convenient maintenance are avoided as much as possible.

Disclosure of Invention

The invention provides a system and a method for realizing self-flow unloading of liquid asphalt by adopting a lifter, wherein the lifter is adopted to lift an automobile tank wagon, a liquid asphalt unloading pump is not needed, the height difference is used as main power, nitrogen backpressure is used as auxiliary power, and the liquid asphalt quickly flows into an asphalt storage tank in a self-flow mode; after unloading, nitrogen purging is automatically carried out on the liquid asphalt conveying pipeline, residual asphalt in the pipeline is completely discharged to an asphalt storage tank according to the inclination, the system is convenient to operate, and maintenance is not needed.

In order to achieve the purpose, the invention adopts the following technical scheme:

a system for realizing self-flow unloading of liquid asphalt by adopting a lifter comprises an overhead operation platform, a lifting well, the lifter, an asphalt conveying pipeline, a nitrogen conveying pipeline and an asphalt storage tank; the overhead operation platform is higher than the asphalt storage tank, an automobile discharging arm and a metal hose are arranged on the overhead operation platform, a lifting well is arranged between the overhead operation platform and the ground, a lifter is arranged in the lifting well, and a lifting platform at the top of the lifter can lift between the bottom of the lifting well and the top surface of the overhead operation platform; when the automobile tank car loaded with the liquid asphalt is unloaded, the automobile tank car is positioned on the lifter and lifted along with the lifting platform; a liquid asphalt outlet pipe on the automobile tank car is connected with an asphalt storage tank through an automobile discharging arm and an asphalt conveying pipeline, and a nitrogen inlet pipe on the automobile tank car is connected with a nitrogen conveying pipeline through a metal hose; the height difference between the automobile tank car and the asphalt storage tank is used as main power, and nitrogen backpressure is used as auxiliary power, so that the liquid asphalt automatically flows into the asphalt storage tank.

The liquid asphalt outlet pipe on the automobile tank wagon is connected with one end of an automobile discharging arm through a quick connector I, the other end of the automobile discharging arm is connected with an asphalt storage tank through an asphalt conveying pipeline, an electromagnetic valve I is arranged on the asphalt conveying pipeline close to one end of the automobile discharging arm, and a temperature recording interlocking alarm instrument is arranged on the asphalt conveying pipeline close to one end of the asphalt storage tank.

And the top of the asphalt storage tank is provided with a diffused gas pipe which is connected with an external diffused gas recovery processing system through a diffused gas main pipe.

And a nitrogen inlet pipe on the automobile tank car is connected with one end of a metal hose through a second quick connector, the other end of the metal hose is connected with a nitrogen conveying pipeline, a throttling orifice plate, a self-operated regulating valve and a second electromagnetic valve are sequentially arranged on the nitrogen conveying pipeline along the nitrogen conveying direction, and the second electromagnetic valve is in interlocking control with a temperature recording interlocking alarm instrument arranged on the asphalt conveying pipeline.

And manual valves are respectively arranged on the liquid asphalt outlet pipe and the nitrogen inlet pipe.

The lifter is a hydraulic lifter.

A method for realizing self-flow unloading of liquid asphalt by adopting an elevator comprises the following steps:

1) when the elevator is at an initial position, the top surface of the lifting platform at the top of the elevator is flush with the ground, an automobile tank car carrying liquid asphalt is parked after running to a specified position on the elevator, the elevator is started, the automobile tank car rises along with the lifting platform of the elevator, and stops rising after the lifting platform rises to the height that the top surface of the automobile tank car is flush with the top surface of the overhead operation platform, and the automobile tank car is confirmed to be in place and is ready to be unloaded;

2) when unloading, connecting the nitrogen conveying pipeline with a nitrogen inlet pipe on the automobile tank car through the second quick connector and the metal hose, connecting an automobile unloading arm with a liquid asphalt outlet pipe on the automobile tank car through the first quick connector, and opening manual valves on the nitrogen inlet pipe and the liquid asphalt outlet pipe to start automatic unloading; opening a first electromagnetic valve on an asphalt conveying pipeline, and enabling liquid asphalt to flow out of an automobile tank car; opening the second electromagnetic valve, limiting the flow of nitrogen through the throttling orifice plate, reducing the pressure through the self-operated regulating valve, pressurizing the automobile tank wagon, and enabling the liquid asphalt to quickly flow into an asphalt storage tank in a self-flow mode under the auxiliary action of nitrogen back pressure by taking the height difference as main power;

3) after unloading is finished, nitrogen enters the asphalt conveying pipeline to automatically perform nitrogen purging due to no liquid seal of liquid asphalt, and residual liquid asphalt in the asphalt conveying pipeline is completely discharged into an asphalt storage tank according to the inclination; the nitrogen flow of nitrogen purging at the later stage is limited by the flow-limiting pore plate, so that the over-quick pressurization of the diffusing gas main pipe is avoided; the temperature of the asphalt conveying pipeline after nitrogen purging is reduced, when the temperature displayed by the temperature recording interlocking alarm instrument reaches the set temperature lower limit, the first electromagnetic valve is closed, then the second electromagnetic valve is closed, and purging is finished;

4) closing manual valves on a nitrogen inlet pipe and a liquid asphalt outlet pipe, disconnecting the first quick connector and the second quick connector, starting a lifter, and stopping the automobile tanker descending to the ground along with a lifting platform of the lifter; and the automobile tank car is driven away from the lifting shaft to prepare for next unloading.

The nitrogen source of the nitrogen conveying pipeline is 4 kg of nitrogen, and the flow is limited to 100Nm through the throttling orifice plate³And after the pressure is reduced to 2 kilograms by a self-operated regulating valve, the automobile tank car is pressurized.

The lower temperature limit is set to 100 ℃.

The liquid asphalt comprises upgraded asphalt or medium temperature asphalt.

Compared with the prior art, the invention has the beneficial effects that:

1) the automobile tank wagon is lifted by the elevator, the height difference is used as the main power without a liquid asphalt unloading pump, the nitrogen back pressure is used as the auxiliary power, so that the liquid asphalt quickly flows into the asphalt storage tank in a self-flowing mode, the system is convenient to operate, and the labor is saved;

2) after unloading, nitrogen purging is automatically carried out on the liquid asphalt conveying pipeline, and residual asphalt in the pipeline is completely discharged to an asphalt storage tank according to the inclination without maintenance.

Drawings

Fig. 1 is a schematic structural diagram of a system for realizing self-flow unloading of liquid asphalt by using an elevator according to the invention.

Fig. 2 is a schematic view of the car tank car of the present invention driven onto the lift in an initial position.

In the figure: 1. asphalt storage tank 2, automobile discharging arm 3, automobile tank car 4, lifter 5, asphalt conveying pipeline 6, nitrogen conveying pipeline 7, diffusion gas main pipe 8, electromagnetic valve I9, electromagnetic valve II 10, self-operated regulating valve 11, throttle orifice 12, metal hose 13, quick connector I14, quick connector II 15, manual valve 16, overhead operation platform 17, lifting shaft TRSA01 and temperature recording interlocking alarm instrument

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in fig. 1 and fig. 2, the system for realizing self-flow unloading of liquid asphalt by using a lift comprises an overhead operation platform 16, a lift shaft 17, a lift 4, an asphalt conveying pipeline 5, a nitrogen conveying pipeline 6 and an asphalt storage tank 1; the overhead operation platform 16 is higher than the asphalt storage tank 1, the overhead operation platform 16 is provided with an automobile discharging arm 2 and a metal hose 12, an elevator shaft 17 is arranged between the overhead operation platform 16 and the ground, an elevator 4 is arranged in the elevator shaft 17, and an elevator platform at the top of the elevator 4 can be lifted between the bottom of the elevator shaft 17 and the top surface of the overhead operation platform 16; the vehicle tank wagon 3 loaded with the liquid asphalt is positioned on the lifter 4 and lifted along with the lifting platform when unloading; a liquid asphalt outlet pipe on the automobile tank wagon 3 is connected with an asphalt storage tank 1 through an automobile discharging arm 2 and an asphalt conveying pipeline 5, and a nitrogen inlet pipe on the automobile tank wagon 3 is connected with a nitrogen conveying pipeline 6 through a metal hose 12; the height difference between the automobile tank car 3 and the asphalt storage tank 1 is used as main power, and nitrogen backpressure is used as auxiliary power, so that the liquid asphalt automatically flows into the asphalt storage tank 1.

The liquid asphalt outlet pipe on the automobile tank car 3 is connected with one end of an automobile discharging arm 2 through a quick connector 13, the other end of the automobile discharging arm 2 is connected with an asphalt storage tank 1 through an asphalt conveying pipeline 5, an electromagnetic valve 8 is arranged on the asphalt conveying pipeline 5 close to one end of the automobile discharging arm 2, and a temperature recording interlocking alarm instrument TRSA01 is arranged on the asphalt conveying pipeline 5 close to one end of the asphalt storage tank 1.

The top of the asphalt storage tank 1 is provided with a diffused gas pipe which is connected with an external diffused gas recovery processing system through a diffused gas main pipe 7.

The nitrogen inlet pipe on the automobile tank car 3 is connected with one end of a metal hose 12 through a second quick connector 14, the other end of the metal hose 12 is connected with a nitrogen conveying pipeline 6, a throttling orifice plate 11, a self-operated regulating valve 10 and a second electromagnetic valve 9 are sequentially arranged on the nitrogen conveying pipeline 6 along the nitrogen conveying direction, and the second electromagnetic valve 9 is in interlocking control with a temperature recording interlocking alarm instrument TRSA01 arranged on the asphalt conveying pipeline 5.

And manual valves 15 are respectively arranged on the liquid asphalt outlet pipe and the nitrogen inlet pipe.

The lifter 4 is a hydraulic lifter.

A method for realizing self-flow unloading of liquid asphalt by adopting an elevator comprises the following steps:

1) when the elevator 4 is at an initial position, the top surface of the lifting platform at the top of the elevator is flush with the ground, the automobile tank car 3 carrying liquid asphalt is parked after driving to a specified position on the elevator 4, the elevator 4 is started, the automobile tank car 3 rises along with the lifting platform of the elevator 4, when the lifting platform rises to the height that the top surface of the lifting platform is flush with the top surface of the overhead operation platform 16, the lifting is stopped, and the automobile tank car 3 is confirmed to be in place and is ready to be unloaded;

2) when unloading, the nitrogen conveying pipeline 6 is connected with a nitrogen inlet pipe on the automobile tank car 3 through the second quick connector 14 and the metal hose 12, the automobile unloading arm 2 is connected with a liquid asphalt outlet pipe on the automobile tank car 3 through the first quick connector 13, and the manual valve 15 on the nitrogen inlet pipe and the liquid asphalt outlet pipe is opened to start automatic unloading; opening a first electromagnetic valve 8 on the asphalt conveying pipeline 5, and enabling the liquid asphalt to flow out of the automobile tank wagon 3; opening the second electromagnetic valve 9, limiting the flow of nitrogen through a throttling orifice plate 11, reducing the pressure through a self-operated regulating valve 10, pressurizing the automobile tank wagon 3, and enabling the liquid asphalt to rapidly flow into the asphalt storage tank 1 in a self-flowing mode by taking the height difference as the main power and under the auxiliary action of the back pressure of the nitrogen;

3) after unloading is finished, nitrogen enters the asphalt conveying pipeline 5 for automatic nitrogen purging due to no liquid seal of liquid asphalt, and residual liquid asphalt in the asphalt conveying pipeline 5 is completely discharged into the asphalt storage tank 1 according to the inclination; the nitrogen flow of nitrogen purging at the later stage is limited through the flow-limiting orifice plate 11, so that the over-quick pressurization of the diffusion gas main pipe 7 is avoided; the temperature of the asphalt conveying pipeline 5 after nitrogen purging is reduced, when the temperature is displayed by a temperature recording interlocking alarm instrument TRSA01 to reach the set lower temperature limit, the first electromagnetic valve 8 is closed, then the second electromagnetic valve 9 is closed, and purging is finished;

4) closing a manual valve 15 on a nitrogen inlet pipe and a liquid asphalt outlet pipe, disconnecting the first quick connector 13 and the second quick connector 14, starting the lifter 4, and stopping the automobile tank car 3 from descending to the ground along with the lifting platform of the lifter 4; the car tank wagon 4 is driven away from the shaft 17 in preparation for the next unloading.

The nitrogen source of the nitrogen conveying pipeline 6 is 4 kg of nitrogen, and the flow is limited to 100Nm through a throttle orifice plate 11³And after the pressure is reduced to 2 kilograms by the self-operated regulating valve 10, the automobile tank car 3 is pressurized.

The lower temperature limit is set to 100 ℃.

The liquid asphalt comprises upgraded asphalt or medium temperature asphalt.

The following examples are carried out on the premise of the technical scheme of the invention, and detailed embodiments and specific operation processes are given, but the scope of the invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.