Railway viscous oil tank truck cleaning and detecting method

Abstract

The invention particularly relates to a cleaning and detecting method for a railway sticky oil tank truck, and solves the problem that the periphery of a manhole, the outer side of a tank body, the bottom in the tank, a heating sleeve or an inner heating pipe is difficult to thoroughly clean by an existing cleaning method for the railway sticky oil tank truck. And the detection method for the railway viscous oil tank truck is difficult to comprehensively detect the content of toxic and harmful gas and oxygen in the railway viscous oil tank truck. The method comprises the following steps that 1, the interior of the railway viscous oil tank truck and the interior of a heating device are cooked till viscous oil in the railway viscous oil tank truck is steamed to be soft and distilled, and clear condensate water flows out of a drainage pipe of the railway viscous oil tank truck; 2) flushing the exterior of the railway viscous oil tank truck; the method comprises the steps of (1) cleaning and detecting a railway viscous oil tank truck, (2) washing a residual oil zone at the bottom in the railway viscous oil tank truck, (4) carrying out three-dimensional washing on the inner wall of the railway viscous oil tank truck, (5) replacing mixed gas in the railway viscous oil tank truck, (6) carrying out an open fire test in the railway viscous oil tank truck, if no abnormal sound and no dense smoke exist, determining that the test is qualified and completing cleaning and detection of the railway viscous oil tank truck, and otherwise, returning to the step (1).

Description

Technical Field

[0001] The invention specifically relates to a method for cleaning and detecting a railway sticky oil tanker. Background Art

[0002] Railway viscous oil tankers are the main railway transportation equipment for loading and unloading viscous media such as crude oil, heavy oil, lubricating oil, benzene chemicals, etc. Railway viscous oil tanker cleaning is the first process before railway viscous oil tanker maintenance. The cleaning quality and the gas detection in the tank after cleaning are related to the life and personal safety of the maintenance workers of railway viscous oil tankers, and the responsibility is heavy.

[0003] The existing railway oil tanker cleaning generally uses high-pressure water jets to perform three-dimensional flushing on the inside of the tank. This flushing method has the following disadvantages:

[0004] First, the sticky oil around the manhole of the railway oil tanker and on the outside of the tank body is not effectively cleaned, which affects the quality of maintenance;

[0005] Second, the cleaning effect of the long strips of oil remaining at the bottom of the tank during loading and unloading is poor, wasting a lot of water resources;

[0006] Third, the external heating jacket or internal heating pipe of the railway oil tanker was not cleaned, leaving a safety hazard.

[0007] The existing inspection of railway oil tankers after cleaning is generally to detect flammable gases. During the inspection process, it is found that in addition to flammable gases, there may also be toxic and harmful gases such as H2S, CO, SO2, and insufficient oxygen content inside the limited space. Therefore, after cleaning railway oil tankers, not only flammable gases should be detected, but also toxic and harmful gases and oxygen content should be detected. Summary of the invention

[0008] The purpose of the present invention is to solve the problem that the existing railway oil tank car cleaning method is difficult to thoroughly clean the area around the manhole, the outside of the tank body, the bottom of the tank, the heating sleeve or the internal heating pipe, and the technical problem that the railway oil tank car detection method is difficult to comprehensively detect the toxic and harmful gases and oxygen content therein, and to provide a railway oil tank car cleaning and detection method.

[0009] In order to achieve the above object, the present invention adopts the following technical solution:

[0010] A method for cleaning and detecting a railway oil tanker, which is special in that it comprises the following steps:

[0011] 1] Boil the inside of the railway viscous oil tank car and the inside of the heating device until the viscous oil inside the railway viscous oil tank car is steamed, softened and distilled, and clear condensed water flows out of the drain pipe of the railway viscous oil tank car;

[0012] 2] Wash the exterior of the railway oil tanker;

[0013] 3] Use high-pressure hot water to flush the residual oil belt at the bottom of the railway oil tank car, and discharge the mixed liquid of oil and sewage after flushing;

[0014] 4] Use high-pressure hot water to perform three-dimensional flushing on the inner wall of the railway oil tanker to remove the distilled oil on the inner wall until clear sewage is discharged;

[0015] 5] Replace the mixed gas inside the railway oil tanker and detect the content of the mixed gas until the content of each gas in the mixed gas reaches the required value;

[0016] 6] Carry out an open flame test inside the railway oil tank car. If there is no abnormal sound or thick smoke, the test is qualified and the cleaning and inspection of the railway oil tank car is completed; otherwise, return to step 1].

[0017] Further, step 1] is specifically as follows:

[0018] Use a hose to simultaneously transport 100KPa~200KPa steam to the bottom of the railway viscous oil tank car and its internal heating pipe or the inside of the external temperature jacket, and cook for 90min~120min until the viscous oil inside the railway viscous oil tank car is softened and distilled, and clear condensate flows out of the drain pipe of the railway viscous oil tank car.

[0019] Further, step 2] is specifically as follows:

[0020] 2.1. Use the external flushing gantry and NaOH solution with a concentration of 5% to 8%, a temperature of 60℃ to 90℃, and a pressure of 500KPa to 600KPa to flush the hardened sticky oil on the outside of the railway sticky oil tanker;

[0021] 2.2. Use clean water with a temperature of 60℃~90℃ and a pressure of 500KPa~600KPa to flush the residual NaOH solution on the outside of the railway oil tanker.

[0022] Further, step 3] is specifically as follows:

[0023] Use a bottom sweeper and clean water with a temperature of 60℃~90℃ and a pressure of 1500KPa~2000KPa to flush the bottom of the railway viscous oil tank car for 10min~15min until the residual oil band on the bottom of the railway viscous oil tank car is cleaned, and the mixed liquid of viscous oil and sewage after flushing is discharged.

[0024] Further, step 4] is specifically as follows:

[0025] Use a three-dimensional flusher and clean water with a temperature of 60℃~90℃ and a pressure of 1500KPa~2000KPa to perform three-dimensional flushing on the inner wall of the railway sticky oil tanker for 20min~25min to remove the distilled sticky oil on the inner wall until clear sewage is discharged.

[0026] Further, step 5] is specifically as follows:

[0027] A fan is used to inflate the bottom of the railway oil tank car, and at the same time, the top of the railway oil tank car is evacuated. At the same time, the gas is evacuated from the upper part of the tank car. The mixed gas content inside the railway oil tank car is detected by a gas detector every 20 minutes to 30 minutes until the oxygen content is 19.5% to 23.5% and the methane content is not higher than 20mg / m 3 , H2S content is not higher than 10mg / m 3 , CO content is not higher than 25ppm, SO2 content is not higher than 20μg / m 3 When , the detection ends.

[0028] Further, in step 5], the gas detector is used to detect the mixed gas content inside the railway oil tanker every 20 minutes to 30 minutes, specifically:

[0029] Every 20 to 30 minutes, a gas detector is used to detect the mixed gas content inside the manhole, the middle of the tank body, and the bottom of the tank body inside the railway oil tank car.

[0030] Furthermore, in step 6], an open flame tester is used to ignite the middle part of the railway oil tanker through the manhole on the top of the railway oil tanker to conduct an open flame test.

[0031] Beneficial effects of the present invention:

[0032] 1. The present invention discloses a method for cleaning and inspecting a railway oil tank car. First, steam is used to boil the interior of the railway oil tank car. Then, high-pressure hot water is used to sweep and flush the oil band remaining on the bottom of the railway oil tank car for a long time. Finally, high-pressure hot water is used to perform three-dimensional flushing in the railway oil tank car. This improves the cleaning quality of the interior of the railway oil tank car, improves the flushing efficiency, saves water resources, and reduces the discharge of tank cleaning wastewater.

[0033] 2. The present invention provides a method for cleaning and detecting railway oil tank cars, which can flush the exterior of railway oil tank cars and effectively clean a large amount of oil adhering to the exterior of railway oil tank cars, thereby providing convenience for subsequent maintenance of railway oil tank cars and ensuring product quality.

[0034] 3. The present invention provides a method for cleaning and inspecting a railway oil tank car, which boils the internal heating pipe or the external temperature jacket in the railway oil tank car, thereby solving the problem of oil leakage into the internal heating pipe or the external temperature jacket causing explosion during hot work.

[0035] 4. The present invention provides a method for cleaning and detecting railway oil tank cars. After cleaning the railway oil tank car, a gas detector is used to detect the content of the mixed gas therein, and then an open flame test is performed to clarify the detection points and gas detection types during gas detection in the railway oil tank car, providing a scientific and reasonable safe operation technical solution for the maintenance and cleaning operations of railway tank cars. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of boiling the interior of a railway sticky oil tank car in Embodiment 1 of a method for cleaning and detecting a railway sticky oil tank car of the present invention;

[0037] Figure 2 It is a schematic diagram of washing the exterior of a railway oil tank car in Embodiment 1 of a method for cleaning and detecting a railway oil tank car of the present invention;

[0038] Figure 3 It is a schematic diagram of washing the residual oil strip at the bottom of a railway oil tank car in Embodiment 1 of a method for cleaning and detecting a railway oil tank car of the present invention;

[0039] Figure 4 It is a schematic diagram of three-dimensionally flushing the inner wall of a railway oil tank car in Embodiment 1 of a method for cleaning and detecting a railway oil tank car of the present invention;

[0040] Figure 5 It is a schematic diagram of replacing the mixed gas inside the railway viscous oil tank car in Example 1 of the railway viscous oil tank car cleaning and detection method of the present invention. DETAILED DESCRIPTION

[0041] Embodiment 1

[0042] A method for cleaning and detecting a railway oil tanker, comprising the following steps:

[0043] 1] Steaming the inside of the railway viscous oil tank car and the inside of the heating device, the viscous oil inside the railway viscous oil tank car is steamed and softened, and clear condensed water flows out of the drain pipe of the railway viscous oil tank car;

[0044] like Figure 1 As shown, a hose is used to simultaneously transport 100KPa steam to the bottom of the railway viscous oil tank car and the interior of the internal heating pipe or the external heating jacket, and the viscous oil inside the railway viscous oil tank car is steamed, softened and distilled, and clear condensed water flows out of the drainage pipe of the railway viscous oil tank car;

[0045] 2] Wash the exterior of the railway oil tanker;

[0046] 2.1, such as Figure 2 As shown, the gantry and NaOH solution with a concentration of 8%, a temperature of 60°C and a pressure of 600KPa are used to wash the hardened sticky oil on the outside of the railway sticky oil tanker;

[0047] 2.2. Use clean water with a temperature of 80°C and a pressure of 550KPa to rinse the residual NaOH solution on the outside of the railway oil tanker to prevent the sticky residual NaOH solution from harming the human body and polluting the environment;

[0048] 3] Use high-pressure hot water to flush the residual oil belt at the bottom of the railway oil tank car, and discharge the mixed liquid of oil and sewage after flushing;

[0049] like Figure 3 As shown, the bottom of the railway oil tank car is rinsed for 15 minutes using a bottom sweeper and clean water at a temperature of 70°C and a pressure of 1500KPa to clean the residual oil band at the bottom of the railway oil tank car, and at the same time discharge the mixed liquid of the viscous oil and sewage after rinsing;

[0050] 4] Use high-pressure hot water to perform three-dimensional flushing on the inner wall of the railway oil tank car to remove the distilled oil from the inner wall and discharge clear sewage;

[0051] like Figure 4 As shown, a three-dimensional flushing device and clean water at a temperature of 60°C and a pressure of 1900KPa are used to perform three-dimensional flushing of the inner wall of the railway oil tanker for 20 minutes to remove the distilled oil on the inner wall and discharge clear sewage;

[0052] In the first embodiment, the residual oil band at the bottom of the railway oil tank car is washed first, and then the inner wall of the railway oil tank car is washed, so as to avoid the clean water ejected by the bottom sweeping and washing device from hitting the clean water with the residual oil band, resulting in poor cleaning effect.

[0053] 5] Replace the mixed gas inside the railway oil tanker and detect the mixed gas content until it reaches the standard, and then end the gas content detection;

[0054] like Figure 5 As shown in the figure, a fan is used to inflate the bottom of the railway oil tank car, and at the same time, the top of the railway oil tank car is evacuated. Every 20 minutes, a gas detector is used to detect the mixed gas content inside the manhole, the middle of the tank body, and the bottom of the tank body. The oxygen content is 20% and the methane content is 15mg / m 3 、H2S content is 9mg / m 3 , CO content is 20ppm, SO2 content is 10μg / m 3 ;

[0055] 6] Use an open flame tester to ignite the middle part of the railway oil tanker through the manhole on the top of the railway oil tanker. If there is no abnormal sound or thick smoke, the test is passed.

[0056] This embodiment only performs one boiling and flushing operation, which improves the flushing efficiency, saves water resources, and reduces the discharge of tank cleaning wastewater. Although high-pressure water jets can be used to replace the boiling and flushing steps of the method of the present invention when cleaning the interior of a railway oil tank car, it will inevitably increase the consumption of water resources, reduce the flushing efficiency, and increase the discharge of railway oil tank car tank cleaning wastewater.

[0057] Embodiment 2

[0058] A method for cleaning and detecting a railway oil tanker, comprising the following steps:

[0059] 1] Use a hose to simultaneously transport 180KPa steam to the bottom of the railway viscous oil tank car and the inside of the internal heating pipe or the external heating jacket, and cook for 90 minutes. The viscous oil inside the railway viscous oil tank car is steamed, softened and distilled, and clear condensed water flows out of the drainage pipe of the railway viscous oil tank car;

[0060] 2] Wash the exterior of the railway oil tanker;

[0061] 2.1. Use the external flushing gantry and NaOH solution with a concentration of 5%, a temperature of 80°C and a pressure of 500KPa to flush the hardened sticky oil on the outside of the railway sticky oil tanker;

[0062] 2.2. Use clean water at a temperature of 60°C and a pressure of 500KPa to rinse the residual NaOH solution on the outside of the railway oil tanker to prevent the sticky residual NaOH solution from harming the human body and polluting the environment;

[0063] 3] Use a bottom sweeper and clean water at a temperature of 60°C and a pressure of 1800KPa to rinse the bottom of the railway oil tanker for 10 minutes, clean the residual oil belt at the bottom of the railway oil tanker, and discharge the mixed liquid of oil and sewage after flushing;

[0064] 4] Use a three-dimensional flusher and clean water at a temperature of 70°C and a pressure of 2000KPa to perform three-dimensional flushing on the inner wall of the railway oil tanker for 25 minutes to remove the distilled oil on the inner wall and discharge clear sewage;

[0065] 5] Replace the mixed gas inside the railway oil tanker and detect the mixed gas content until it reaches the standard, and then end the gas content detection;

[0066] A fan is used to inflate the bottom of the railway oil tanker and to extract air from the top of the railway oil tanker. A gas detector is used every 28 minutes to detect the mixed gas content inside the manhole, the middle of the tank, and the bottom of the tank. The oxygen content is 19.5% and the methane content is 16mg / m 3 、H2S content is 5mg / m 3 , CO content is 18ppm, SO2 content is 17ug / m 3 , the detection effect of each gas is good.

[0067] 6] Use an open flame tester to ignite the middle part of the railway oil tanker through the manhole on the top of the railway oil tanker. Although there is no abnormal sound or thick smoke, return to step 1] and clean it again.

[0068] In the second embodiment, the water temperature is low, but the water pressure is high, and the steaming and rinsing are performed twice.

[0069] Embodiment 3

[0070] A method for cleaning and detecting a railway oil tanker, comprising the following steps:

[0071] 1] Use a hose to simultaneously transport 200KPa steam to the bottom of the railway viscous oil tank car and the inside of the internal heating pipe or the external heating jacket, and cook for 100 minutes. The viscous oil inside the railway viscous oil tank car is steamed, softened and distilled, and clear condensed water flows out of the drainage pipe of the railway viscous oil tank car;

[0072] 2] Wash the exterior of the railway oil tanker;

[0073] 2.1. Use the external flushing gantry and NaOH solution with a concentration of 7%, a temperature of 90°C and a pressure of 550KPa to flush the hardened sticky oil on the outside of the railway sticky oil tanker;

[0074] 2.2. Use clean water at a temperature of 90°C and a pressure of 600KPa to rinse the residual NaOH solution on the outside of the railway oil tanker to prevent the sticky residual NaOH solution from harming the human body and polluting the environment;

[0075] 3] Use a bottom sweeper and clean water at a temperature of 90°C and a pressure of 2000KPa to rinse the bottom of the railway oil tanker for 13 minutes, clean the residual oil belt at the bottom of the railway oil tanker, and discharge the mixed liquid of oil and sewage after flushing;

[0076] 4] Use a three-dimensional flusher and clean water at a temperature of 90°C and a pressure of 1500KPa to perform three-dimensional flushing on the inner wall of the railway oil tanker for 23 minutes to remove the distilled oil on the inner wall and discharge clear sewage;

[0077] In this embodiment, the residual oil band on the bottom of the railway oil tank car is washed first, and then the inner wall of the railway oil tank car is washed, so as to avoid the clean water ejected by the bottom sweeping and washing device hitting the clean water with the residual oil band, resulting in poor cleaning effect.

[0078] 5] A fan was used to inflate the bottom of the railway oil tanker and to evacuate the top of the railway oil tanker. After 30 minutes, a gas detector was used to detect the mixed gas content inside the manhole, the middle of the tank, and the bottom of the tank. The oxygen content was 23.5% and the methane content was 20mg / m 3 、H2S content is 10mg / m 3 , CO content is 25ppm, SO2 content is 20μg / m 3 .

[0079] 6] Use an open flame tester to ignite the middle part of the railway oil tanker through the manhole on the top of the railway oil tanker. If there is no abnormal sound or thick smoke, the test is passed.

[0080] In the third embodiment, the water temperature and water pressure are both relatively high, the time for steaming and rinsing is relatively short, water resources are saved, and the rinsing effect is relatively good.

Claims

1. A method for cleaning and detecting railway oil tank cars, characterized in that: The following steps are involved: 1] Boil the inside of the railway viscous oil tank car and the inside of the heating device until the viscous oil inside the railway viscous oil tank car is steamed, softened and distilled, and clear condensed water flows out of the drain pipe of the railway viscous oil tank car; 2] Wash the exterior of the railway oil tanker; 3] Use high-pressure hot water to flush the residual oil belt at the bottom of the railway oil tank car, and discharge the mixed liquid of oil and sewage after flushing; 4] Use high-pressure hot water to perform three-dimensional flushing on the inner wall of the railway oil tanker to remove the distilled oil on the inner wall until clear sewage is discharged; 5] Replace the mixed gas inside the railway oil tanker and detect the content of the mixed gas until the content of each gas in the mixed gas reaches the required value; 6] Carry out an open flame test inside the railway oil tank car. If there is no abnormal sound or thick smoke, the test is qualified and the cleaning and inspection of the railway oil tank car is completed; otherwise, return to step 1].

2. According to the method for cleaning and detecting railway oil-sticky tank cars according to claim 1, it is characterized in that: Step 1] Specifically: Use a hose to simultaneously transport 100KPa~200KPa steam to the bottom of the railway viscous oil tank car and its internal heating pipe or the inside of the external temperature jacket, and cook for 90min~120min until the viscous oil inside the railway viscous oil tank car is softened and distilled, and clear condensate flows out of the drain pipe of the railway viscous oil tank car.

3. A method for cleaning and detecting railway oil-sticky tank cars according to claim 2, characterized in that: Step 2] Specifically: 2.

1. Use the external flushing gantry and NaOH solution with a concentration of 5% to 8%, a temperature of 60℃ to 90℃, and a pressure of 500KPa to 600KPa to flush the hardened sticky oil on the outside of the railway sticky oil tanker; 2.

2. Use clean water with a temperature of 60℃~90℃ and a pressure of 500KPa~600KPa to flush the residual NaOH solution on the outside of the railway oil tanker.

4. A method for cleaning and detecting railway oil-sticky tank cars according to claim 3, characterized in that: Step 3] Specifically: Use a bottom sweeper and clean water with a temperature of 60℃~90℃ and a pressure of 1500KPa~2000KPa to flush the bottom of the railway viscous oil tank car for 10min~15min until the residual oil band on the bottom of the railway viscous oil tank car is cleaned, and the mixed liquid of viscous oil and sewage after flushing is discharged.

5. A method for cleaning and detecting railway oil-sticky tank cars according to claim 4, characterized in that: Step 4] Specifically: Use a three-dimensional flusher and clean water with a temperature of 60℃~90℃ and a pressure of 1500KPa~2000KPa to perform three-dimensional flushing on the inner wall of the railway sticky oil tanker for 20min~25min to remove the distilled sticky oil on the inner wall until clear sewage is discharged.

6. A method for cleaning and detecting railway oil-sticky tank cars according to claim 5, characterized in that: Step 5] Specifically: A fan is used to inflate the bottom of the railway oil tank car, and at the same time, the top of the railway oil tank car is evacuated. At the same time, the gas is evacuated from the upper part of the tank car. The mixed gas content inside the railway oil tank car is detected by a gas detector every 20 minutes to 30 minutes until the oxygen content is 19.5% to 23.5% and the methane content is not higher than 20mg / m 3 , H2S content is not higher than 10mg / m 3 , CO content is not higher than 25ppm, SO2 content is not higher than 20μg / m 3 When , the detection ends.

7. A method for cleaning and detecting railway oil-sticky tank cars according to claim 6, characterized in that: In step 5], the gas detector is used to detect the mixed gas content inside the railway oil tanker every 20 minutes to 30 minutes, specifically: Every 20 to 30 minutes, a gas detector is used to detect the mixed gas content inside the manhole, the middle of the tank body, and the bottom of the tank body inside the railway oil tank car.

8. A method for cleaning and detecting railway oil-sticky tank cars according to claim 7, characterized in that: In step 6], an open flame tester is used to ignite the middle part of the railway oil tank car through the manhole on the top of the railway oil tank car to conduct an open flame test.

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