Railway oil tank car cleaning and testing method

Abstract

The present application relates to a kind of railway sticky oil tank car cleaning and detection method, solve the problem that the existing railway sticky oil tank car cleaning method is difficult to clean around manhole, tank body outside, tank bottom, heating sleeve or inner heating pipe thoroughly, and the technical problem that the detection method of railway sticky oil tank car is difficult to detect the content of toxic and harmful gas and oxygen in it comprehensively.The method comprises the following steps:1】steam railway sticky oil tank car inside and heating device inside, until the sticky oil in railway sticky oil tank car inside is steamed soft distillation, and the drain pipe of railway sticky oil tank car flows out clear condensate water;2】flush the outside of railway sticky oil tank car;3】flush the residual oil belt of the bottom of railway sticky oil tank car;4】three-dimensional flushing is carried out to the inner wall of railway sticky oil tank car;5】replace the mixed gas in railway sticky oil tank car;6】carry out open fire test in railway sticky oil tank car, if there is no abnormal sound, no smoke, then test is qualified, complete railway sticky oil tank car cleaning and detection;Otherwise, return to step 1】.

Description

TECHNICAL FIELD

[0001] The present application relates to a railway viscous oil tank car cleaning and detection method. BACKGROUND

[0002] The railway viscous oil tank car is the main railway transportation equipment for loading and unloading and transporting viscous media such as crude oil, heavy oil, lubricating oil, and benzene chemical products. The railway viscous oil tank car cleaning is the first process before the maintenance of the railway viscous oil tank car, and the cleaning quality and the detection of the gas in the tank after cleaning are related to the life and personal safety of the maintenance personnel of the railway viscous oil tank car, and are of great responsibility.

[0003] The existing railway viscous oil tank car cleaning generally uses high-pressure water jet to flush the inside of the tank body in three dimensions. This flushing method has the following disadvantages:

[0004] Firstly, the viscous oil adhered around the manhole of the railway viscous oil tank car and the outside of the tank body is not effectively cleaned, which affects the maintenance quality.

[0005] Secondly, the cleaning effect of the long strip-shaped oil belt remaining on the tank bottom during loading and unloading is poor, and a large amount of water resources is wasted.

[0006] Thirdly, the external heating jacket or internal heating pipe of the railway viscous oil tank car is not cleaned, which leaves a safety hazard.

[0007] The existing detection after the cleaning of the railway viscous oil tank car is generally the detection of flammable gas. It is found during the detection process that in addition to the flammable gas, there may be H2S, CO, SO2, and other toxic and harmful gases in the inside of the tank body of the tank car, and the oxygen content in the limited space is insufficient. Therefore, after the cleaning of the railway viscous oil tank car, not only the flammable gas needs to be detected, but also the toxic and harmful gas and the oxygen content need to be detected. SUMMARY

[0008] The purpose of the present application is to solve the technical problems that the existing railway viscous oil tank car cleaning method cannot completely clean the manhole, the outside of the tank body, the bottom of the tank, and the heating jacket or internal heating pipe, and the railway viscous oil tank car detection method cannot comprehensively detect the toxic and harmful gas and the oxygen content in the tank, and to provide a railway viscous oil tank car cleaning and detection method.

[0009] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0010] A railway viscous oil tank car cleaning and detection method, which is characterized by comprising the following steps:

[0011] 1. Cooking the inside of the railway viscous oil tank car and the inside of the heating device until the viscous oil in the inside of the railway viscous oil tank car is evaporated and softened, and the clear condensate water flows out of the drain pipe of the railway viscous oil tank car;

[0012] 2】flushing the outside of the railway sticky tank car;

[0013] 3】using high-pressure hot water to flush the residual oil belt on the inside bottom of the railway sticky tank car, while discharging the mixture of the flushed sticky oil and sewage;

[0014] 4】using high-pressure hot water to flush the inside wall of the railway sticky tank car in three dimensions to remove the distillation sticky oil on the inside wall until clear sewage is discharged;

[0015] 5】replacing the mixed gas inside the railway sticky tank car and detecting the content of the mixed gas until the content of each gas in the mixed gas reaches the required value;

[0016] 6】carrying out a fire test inside the railway sticky tank car. If there is no abnormal sound and no thick smoke, the test is qualified and the cleaning and detection of the railway sticky tank car are completed; otherwise, return to step 1】.

[0017] Further, step 1】 is specifically:

[0018] using a rubber pipe to simultaneously deliver steam at 100KPa~200KPa to the inside of the bottom of the railway sticky tank car and the inside of the heating pipe or the outer heating sleeve, and cooking for 90min~120min until the sticky oil inside the railway sticky tank car is steamed soft and distilled, and clear condensed water flows out of the drain pipe of the railway sticky tank car.

[0019] Further, step 2】 is specifically:

[0020] 2.1, using the tank body outside flushing gantry and NaOH solution with a concentration of 5%~8%, a temperature of 60℃~90℃, and a pressure of 500KPa~600KPa to flush the outside of the railway sticky tank car.

[0021] 2.2, using clear water with a temperature of 60℃~90℃ and a pressure of 500KPa~600KPa to flush the residual NaOH solution outside the railway sticky tank car.

[0022] Further, step 3】 is specifically:

[0023] using a bottom-sweeping flusher and clear water with a temperature of 60℃~90℃ and a pressure of 1500KPa~2000KPa to flush the inside bottom of the railway sticky tank car for 10min~15min until the residual oil belt on the inside bottom of the railway sticky tank car is cleaned, while discharging the mixture of the flushed sticky oil and sewage.

[0024] Further, step 4】 is specifically:

[0025] The inner wall of the railway sticky oil tank car is three-dimensionally washed for 20-25 minutes by using a three-dimensional flusher and clean water with a temperature of 60-90 DEG C and a pressure of 1500-2000 KPa, so as to remove the inner wall distillation sticky oil until clean sewage is discharged.

[0026] Further, the step 5 is specifically:

[0027] The inner bottom of the railway sticky oil tank car is aerated by using a fan, the inner top of the railway sticky oil tank car is simultaneously aerated, and the mixed gas content in the railway sticky oil tank car is detected by using a gas detector every 20-30 minutes, until the oxygen content is 19.5-23.5%, the methane content is not higher than 20 mg / m 3 , the H2S content is not higher than 10 mg / m 3 , the CO content is not higher than 25 ppm, and the SO2 content is not higher than 20 ug / m 3 , and the detection is ended.

[0028] Further, in the step 5, the detection of the mixed gas content in the railway sticky oil tank car by using the gas detector every 20-30 minutes is specifically:

[0029] The manhole diameter inside, the middle part of the tank body and the bottom of the tank body in the railway sticky oil tank car are respectively detected by using the gas detector every 20-30 minutes.

[0030] Further, in the step 6, the middle part of the railway sticky oil tank car is ignited by using a flare tester through the manhole on the top of the railway sticky oil tank car to perform a flare test.

[0031] The beneficial effects of the present application are:

[0032] 1. The railway sticky oil tank car cleaning and detection method provided by the present application first uses steam to cook the inside of the railway sticky oil tank car, then uses high-pressure hot water to clean and flush the long-term residual oil belt on the inner bottom of the railway sticky oil tank car, and finally uses high-pressure hot water to perform three-dimensional flushing in the railway sticky oil tank car, thereby improving the cleaning quality of the inside of the railway sticky oil tank car, improving the flushing efficiency, saving water resources, and reducing the discharge amount of tank cleaning wastewater.

[0033] 2. The railway sticky oil tank car cleaning and detection method provided by the present application can effectively clean a large amount of sticky oil adhered to the outside of the railway sticky oil tank car by flushing the outside of the railway sticky oil tank car, thereby providing convenience for subsequent railway sticky oil tank car maintenance and ensuring product quality.

[0034] 3、The railway sticky oil tank car cleaning and detection method of the present application boils the inner heating pipe or the outer heating sleeve in the railway sticky oil tank car, solves the problem of oil burning caused by leakage into the inner heating pipe or the outer heating sleeve during the fire operation.

[0035] 4、The railway sticky oil tank car cleaning and detection method of the present application, after cleaning the railway sticky oil tank car, uses a gas detector to detect the mixed gas content in the railway sticky oil tank car, and then carries out an open fire test, thereby determining the detection point and the type of gas detection when detecting the gas in the railway sticky oil tank car, and providing a scientific and reasonable safety operation technical scheme for the railway tank car repair and cleaning operation. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a schematic view of boiling the inside of the railway sticky oil tank car in the first embodiment of the railway sticky oil tank car cleaning and detection method of the present application;

[0037] Figure 2 is a schematic view of flushing the outside of the railway sticky oil tank car in the first embodiment of the railway sticky oil tank car cleaning and detection method of the present application;

[0038] Figure 3 is a schematic view of flushing the residual oil belt at the bottom of the railway sticky oil tank car in the first embodiment of the railway sticky oil tank car cleaning and detection method of the present application;

[0039] Figure 4 is a schematic view of three-dimensional flushing of the inner wall of the railway sticky oil tank car in the first embodiment of the railway sticky oil tank car cleaning and detection method of the present application;

[0040] Figure 5 is a schematic view of replacing the mixed gas in the railway sticky oil tank car in the first embodiment of the railway sticky oil tank car cleaning and detection method of the present application. DETAILED DESCRIPTION

[0041] Embodiment I

[0042] A railway sticky oil tank car cleaning and detection method, comprising the following steps:

[0043] 1】Boil the inside of the railway sticky oil tank car and the inside of the heating device, and the sticky oil in the railway sticky oil tank car is evaporated and softened and distilled, and clear condensate water flows out of the drain pipe of the railway sticky oil tank car;

[0044] As shown in Figure 1 , a rubber tube is used to simultaneously deliver steam at 100 KPa to the inside of the bottom of the railway sticky oil tank car and the inner heating pipe or the outer heating sleeve, and boiling is carried out for 120 min, the sticky oil in the railway sticky oil tank car is evaporated and softened and distilled, and clear condensate water flows out of the drain pipe of the railway sticky oil tank car;

[0045] 2】Flush the outside of the railway sticky oil tank car;

[0046] 2.1, such as Figure 2 As shown, the hardened and viscous oil on the outside of the railway oil tank car is washed away using an external flushing gantry and a NaOH solution with a concentration of 8%, a temperature of 60°C, and a pressure of 600 kPa.

[0047] 2.2 Use clean water at 80℃ and 550KPa to rinse the exterior of the oil-stained railway tank cars to remove residual NaOH solution, so as to avoid the sticky residual NaOH solution from harming the human body and polluting the environment.

[0048] 3. High-pressure hot water is used to rinse the bottom of the railway oil-stained tank car to remove residual oil, and the mixture of stained oil and sewage after rinsing is discharged.

[0049] like Figure 3 As shown, the bottom of the railway oil-stained tank car is rinsed for 15 minutes using a bottom sweeper and clean water at a temperature of 70℃ and a pressure of 1500KPa to clean the residual oil from the bottom of the railway oil-stained tank car, and the mixture of oil and sewage after rinsing is discharged.

[0050] 4. High-pressure hot water is used to perform three-dimensional flushing of the inner wall of the railway oil-stained tank car to remove the distilled oil from the inner wall and discharge clear wastewater;

[0051] like Figure 4 As shown, a three-dimensional flushing device and clean water at a temperature of 60℃ and a pressure of 1900KPa were used to flush the inner wall of the railway oil-stained tank car for 20 minutes to remove the distilled oil from the inner wall and discharge clear wastewater.

[0052] In this first embodiment, the residual oil slick at the bottom of the railway oil-stained tank car is rinsed first, and then the inner wall of the railway oil-stained tank car is cleaned to avoid the clean water sprayed by the bottom sweeper hitting the clean water with residual oil slick, which would result in poor cleaning effect.

[0053] 5. Replace the mixed gas inside the viscous oil tank car and test its content until it meets the standard, then end the gas content test;

[0054] like Figure 5 As shown, a blower was used to inflate the bottom of the railway oil-contaminated tank car, while air was simultaneously evacuated from the top. Every 20 minutes, a gas detector was used to measure the mixed gas content inside the manhole, in the middle of the tank, and at the bottom of the tank. The oxygen content was 20%, and the methane content was 15 mg / m³. 3 H2S content is 9 mg / m³ 3 CO content is 20 ppm, SO2 content is 10 μg / m³ 3 ;

[0055] 6】Using the open fire tester through the manhole on the top of the railway sticky oil tank truck, the middle part is ignited, and there is no abnormal sound and no smoke, so the test is qualified.

[0056] The embodiment only performs one steaming and flushing operation, improves the flushing efficiency, saves water resources, and reduces the discharge amount of tank cleaning wastewater. Although high-pressure water jet can be used to replace the steaming and flushing steps of the method in the present application during the internal cleaning of the railway sticky oil tank truck, the water resource consumption will inevitably increase, the flushing efficiency will decrease, and the discharge of the railway sticky oil tank truck cleaning wastewater will increase.

[0057] Example 2

[0058] A railway sticky oil tank truck cleaning and detection method, comprising the following steps:

[0059] 1】Use a rubber pipe to simultaneously deliver steam at 180 KPa to the bottom of the railway sticky oil tank truck and the inside of the heating pipe or outer heating jacket, and steam for 90 min, so that the sticky oil in the railway sticky oil tank truck is softened and distilled, and clear condensed water flows out of the drain pipe of the railway sticky oil tank truck;

[0060] 2】Flush the outside of the railway sticky oil tank truck;

[0061] 2.1, use the tank body outside flushing gantry and NaOH solution with a concentration of 5%, a temperature of 80°C, and a pressure of 500 KPa to flush the hardened sticky oil outside the railway sticky oil tank truck;

[0062] 2.2, use clean water at a temperature of 60°C and a pressure of 500 KPa to flush the residual NaOH solution outside the railway sticky oil tank truck, to avoid the damage of the sticky and slippery residual NaOH solution to the human body and the pollution of the environment;

[0063] 3】Use the bottom-sweeping flusher and clean water at a temperature of 60°C and a pressure of 1800 KPa to flush the inside bottom of the railway sticky oil tank truck for 10 min, clean the residual oil on the inside bottom of the railway sticky oil tank truck, and discharge the mixture of the flushed sticky oil and sewage;

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

[0065] 5】Replace the mixed gas inside the railway sticky oil tank truck, and detect the content of the mixed gas inside until it meets the standard, and end the gas content detection;

[0066] The fan is used to inflate the bottom of the railway sticky oil tank car, and the top of the railway sticky oil tank car is simultaneously pumped. Every 28 minutes, the gas detector is used to detect the mixed gas content of the manhole diameter inside the railway sticky oil tank car, the middle of the tank body, and the bottom of the tank body. The oxygen content is 19.5%, the methane content is 16mg / m 3 , the H2S content is 5mg / m 3 , the CO content is 18ppm, and the SO2 content is 17ug / m 3 , and the gas detection effect is good.

[0067] 6】Using the open fire tester, the middle of the railway sticky oil tank car is ignited through the manhole on the top of the railway sticky oil tank car. Although there is no abnormal sound and no thick smoke, it returns to step 1】 and is cleaned again.

[0068] In this example two, the water temperature is lower, but the water pressure is higher, and two times of cooking and flushing are performed.

[0069] Example three

[0070] A railway sticky oil tank car cleaning and detection method, comprising the following steps:

[0071] 1】The steam of 200KPa is simultaneously delivered to the bottom of the railway sticky oil tank car and the inside of the heating pipe or the outer heating sleeve inside it through a rubber pipe, and is cooked for 100min. The sticky oil in the railway sticky oil tank car is steamed soft and distilled, and the clear condensate water flows out of the drain pipe of the railway sticky oil tank car;

[0072] 2】Flushing the outside of the railway sticky oil tank car;

[0073] 2.1, using the outside flushing gantry of the tank body and the NaOH solution with a concentration of 7%, a temperature of 90℃ and a pressure of 550KPa, flushing the hardening sticky oil outside the railway sticky oil tank car;

[0074] 2.2, using the clear water with a temperature of 90℃ and a pressure of 600KPa to flush the residual NaOH solution outside the railway sticky oil tank car, to avoid the harm of sticky residual NaOH solution to the human body and the pollution of the environment;

[0075] 3】Using the bottom flushing device and the clear water with a temperature of 90℃ and a pressure of 2000KPa, flushing the bottom of the railway sticky oil tank car for 13min, cleaning the residual oil on the bottom of the railway sticky oil tank car, and discharging the mixed liquid of the flushed sticky oil and sewage;

[0076] 4】Using the three-dimensional flushing device and the clear water with a temperature of 90℃ and a pressure of 1500KPa, three-dimensional flushing is performed on the inner wall of the railway sticky oil tank car for 23min, to remove the distilled sticky oil on the inner wall and discharge the clear sewage;

[0077] In this embodiment, the residual oil belt on the bottom of the railway sticky oil tank car is washed first, and then the inner wall of the railway sticky oil tank car is cleaned, so that the clean water sprayed by the bottom washing device does not hit the clean water with residual oil belt, and the cleaning effect is not good.

[0078] 5】The fan is used to inflate the inner bottom of the railway sticky oil tank car, and the inner top of the railway sticky oil tank car is simultaneously pumped. After 30 minutes, the gas detector is used to detect the mixed gas content of the manhole diameter inside the railway sticky oil tank car, the middle of the tank body and the bottom of the tank body, respectively. The oxygen content is 23.5%, the methane content is 20mg / m 3 , the H2S content is 10mg / m 3 , the CO content is 25ppm, and the SO2 content is 20μg / m 3 .

[0079] 6】The open fire tester is used to ignite the middle part of the railway sticky oil tank car through the manhole on the top of the railway sticky oil tank car. If there is no abnormal sound and no thick smoke, the test is qualified.

[0080] In this embodiment, the water temperature and water pressure are higher, the cooking and washing time is shorter, the water resources are saved, and the washing effect is better.

Claims

1. A method for cleaning and inspecting oil-contaminated railway tank cars, characterized in that, Includes the following steps: 1】Use rubber hoses to simultaneously deliver 100KPa~200KPa steam to the bottom of the railway viscous oil tank car and the interior of its internal heating pipes or external heating jacket, and steam 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. 2】Use the external gantry of the tank body and a NaOH solution with a concentration of 5% to 8%, a temperature of 60℃ to 90℃, and a pressure of 500KPa to 600KPa to rinse the hardened sticky oil on the outside of the railway oil-sticky tank car. Then use clean water with a temperature of 60℃ to 90℃ and a pressure of 500KPa to 600KPa to rinse the residual NaOH solution on the outside of the railway oil-sticky tank car.

3. High-pressure hot water is used to rinse the bottom of the railway oil-stained tank car to remove residual oil, and the mixture of stained oil and sewage after rinsing is discharged.

4. High-pressure hot water is used to perform three-dimensional flushing of the inner wall of the railway oil-stained tank car to remove the distilled oil from the inner wall until clear wastewater is discharged.

5. Replace the mixed gas inside the viscous oil tank car of the railway and test its content until the content of each gas in the mixed gas reaches the required value; 6】Conduct an open flame test inside the oil-stained railway tank car. If there are no abnormal noises or thick smoke, the test is qualified, and the cleaning and inspection of the oil-stained railway tank car is completed; otherwise, return to step 1.

2. The method for cleaning and detecting oil-stained railway tank cars according to claim 1, characterized in that, Step 3: Specifically, it is as follows: Using a bottom-sweeping flusher and clean water at a temperature of 60℃~90℃ and a pressure of 1500KPa~2000KPa, flush the bottom of the railway oil-stained tank car for 10min~15min until the residual oil is cleaned from the bottom of the railway oil-stained tank car. At the same time, drain the mixture of oil and sewage after flushing.

3. The method for cleaning and detecting oil-contaminated railway tank cars according to claim 2, characterized in that, Step 4 is as follows: Using a three-dimensional flusher and clean water at a temperature of 60℃~90℃ and a pressure of 1500KPa~2000KPa, the inner wall of the railway oil-stained tank car is flushed for 20min~25min to remove the distilled oil from the inner wall until clear wastewater is discharged.

4. The method for cleaning and detecting oil-stained railway tank cars according to claim 3, characterized in that, Step 5 is as follows: A blower was used to inflate the bottom of the viscous oil tank car, while air was simultaneously drawn from the top. Every 20-30 minutes, a gas detector was used to monitor the mixed gas content inside the tank car until the oxygen content was 19.5%-23.5% and the methane content did not exceed 20 mg / m³. 3 H2S content not exceeding 10 mg / m³ 3 CO content not exceeding 25 ppm, SO2 content not exceeding 20 μg / m³ 3 The test ends when the time is right.

5. The method for cleaning and detecting oil-contaminated railway tank cars according to claim 4, characterized in that, In step 5, the step of detecting the mixed gas content inside the railway viscous oil tank car every 20-30 minutes using a gas detector specifically involves: Every 20 to 30 minutes, a gas detector is used to detect the mixed gas content inside the manhole, in the middle of the tank, and at the bottom of the tank inside the railway viscous oil tank car.

6. The method for cleaning and detecting oil-contaminated railway tank cars according to claim 5, characterized in that: In step 6, an open flame tester is used to ignite the interior of the oil tanker through the manhole on the top of the railcar to conduct an open flame test.

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