Production process of stepped boost quick replacement hydrogen long tube trailer

Abstract

The application discloses a production process of a stepped boosting fast replacement hydrogen long tube trailer, which comprises the following steps: checking before replacement, checking residual pressure and temperature, replacing and emptying a pipeline, switching to a sampling branch, opening a valve for sampling, closing a sampling valve, analyzing a sample, calculating a maximum hydrogen estimation amount required for replacement, filling high-purity hydrogen, replacing and filling a pipeline, filling the hydrogen long tube trailer, repeatedly filling, detecting a sample again, and detecting whether a replacement result is qualified or not. The application can quickly, efficiently and safely replace hydrogen tanks of a tube bundle trailer, can reduce replacement time of the tube bundle trailer, can reduce hydrogen consumption during replacement, and can reduce average transportation cost of hydrogen.

Description

TECHNICAL FIELD

[0001] The present application relates to the hydrogen storage handling technology field, more particularly to a production process of a stepped pressure boosting fast replacement hydrogen long tube trailer. BACKGROUND

[0002] Hydrogen is a colorless, odorless, highly flammable and difficult to dissolve in water gas at room temperature and pressure. The explosion limit volume ratio of hydrogen is 4.0-75.6%. As a sustainable clean energy, hydrogen is considered to be one of the ideal substitutes for traditional fossil fuels, and has great market potential in the fields of energy, transportation and industrial production. The hydrogen energy industry chain mainly includes hydrogen production, storage and application, and safe and efficient hydrogen storage is the key link in the development of the hydrogen energy industry chain.

[0003] Currently, the main hydrogen supply mode of hydrogen refueling stations is still pipe bundle hydrogen supply. However, there is no unified operation specification for pipe bundle hydrogen replacement. The usual practice is to repeatedly charge and release hydrogen at constant pressure until the hydrogen purity in the pipe bundle tank meets the standard. This method not only consumes a long time, but also consumes a lot of hydrogen, increasing the cost of hydrogen transportation.

[0004] Therefore, there is an urgent need for a production process of a stepped pressure boosting fast replacement hydrogen long tube trailer. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a production process of a stepped pressure boosting fast replacement hydrogen long tube trailer to solve the problems in the background art.

[0006] To solve the above technical problems, the technical solutions adopted by the present application are as follows.

[0007] A production process of a stepped pressure boosting fast replacement hydrogen long tube trailer, specifically comprising the following steps:

[0008] S1, checking the hydrogen long tube trailer before replacement:

[0009] S2, opening all branch valves of the closed sampler, checking and recording the residual pressure and temperature of the hydrogen long tube trailer;

[0010] S3, connecting the vent line to the hydrogen long tube trailer main valve A, connecting the other end of the vent line to the closed sampler, then opening the hydrogen long tube trailer main valve A, releasing the hydrogen in the hydrogen long tube trailer for 30S, and replacing the gas in the vent line;

[0011] S4, after replacement, close the vent branch of the vent line and open the sampling branch;

[0012] S5, connect the sampling steel bottle to the sampling branch of the closed sampler, open the inlet valve, pressure reducing valve, circulating valve and vent valve in turn, observe the pressure gauge, when the hydrogen pressure is reduced to the appropriate pressure range, close the circulating valve, open the first needle valve and the second needle valve at both ends of the sampling steel bottle, and sample;

[0013] S6, after the pressure gauge of the closed sampler indicates stability, close the first needle valve, the second needle valve, the inlet valve and the pressure reducing valve in turn;

[0014] S7, open the circulating valve, and close the circulating valve and the vent valve after the system pressure reaches normal;

[0015] S8, remove the sampling steel bottle and send it to the laboratory for analysis;

[0016] S9, analyze the worst indicator of hydrogen detection of the hydrogen long tube trailer, and calculate the maximum hydrogen estimation amount required for replacement;

[0017] S10, connect the filling pipeline to the total valve B interface of the hydrogen long tube trailer, and connect the filling pipeline to the high-purity hydrogen source;

[0018] S11, open the total valve B of the hydrogen long tube trailer, and release the hydrogen in the hydrogen long tube trailer for 30s to replace the gas in the filling pipeline;

[0019] S12, open the filling pipeline valve, start filling the hydrogen long tube trailer, close the total valve B of the hydrogen long tube trailer and the valve on the filling pipeline after filling is completed, open the total valve A of the hydrogen long tube trailer and the valve on the vent pipeline, and vent the hydrogen used for replacement in the hydrogen long tube trailer; complete a complete replacement process, and record the starting and ending pressures and temperatures for subsequent calculation of the hydrogen amount used for replacement;

[0020] S13, repeat the filling steps of steps S9-12, fill 3-4 times at a filling pressure of 1-2 MPa, then fill 2-3 times at a filling pressure of 2-3 MPa, and then fill 1-2 times at a filling pressure of 3-5 MPa;

[0021] S14, after the replacement of the calculated hydrogen amount is completed, sample and detect the hydrogen in the tube bundle trailer again;

[0022] S15, after the replacement detection result is obtained, if it is qualified, the replacement is completed; if it is not qualified, continue to replace the hydrogen according to the third filling process condition until the hydrogen detection result is qualified, which is the successful replacement.

[0023] Further optimize the technical scheme, and the step S1 specifically comprises the following steps:

[0024] S101, stop the vehicle and place the triangular sleeper properly;

[0025] S102, determine that the hydrogen long tube trailer is in the working state of the opening device;

[0026] S103, connect the hydrogen long tube trailer with the static electricity elimination device;

[0027] S104, verify whether the tank inspection report, thermometer, pressure gauge and other accessory inspection are within the effective period, check whether the filling valve, hose and joint thread, valve sealing surface, O-ring are intact, and carry out overall leakage detection inspection.

[0028] Further optimize the technical scheme, the vent branch of the vent line in the step S4 is provided with an emergency sampling port.

[0029] Further optimize the technical scheme, the suitable pressure range in the step S5 is 1-4 MPa.

[0030] Further optimize the technical scheme, the analysis standard in the step S8 is: O2 in the hydrogen is detected ≤1.00 PPM, the content of Ar is agreed by the supply and demand parties, N2 ≤5 PPM, CO ≤1 PPM, CH4 ≤1 PPM, CO2 ≤1 PPM, H2O ≤3 PPM, the total content of impurities ≤10 PPM, and the purity of hydrogen ≥99.999%.

[0031] Further optimize the technical scheme, the calculation formula in the step S9 is: worst index concentration × empty car hydrogen volume = (worst index qualified required concentration - the concentration of the corresponding component in the displacement gas) × (displacement hydrogen volume + loaded car hydrogen volume).

[0032] Further optimize the technical scheme, the valve on the filling line in the step S12 includes a first inlet valve and a first stop valve.

[0033] Further optimize the technical scheme, the valve on the vent line in the step S12 includes a second inlet valve, a pressure reducing valve, a second stop valve, a circulating valve, an outlet valve and a vent valve.

[0034] Due to the adoption of the above technical scheme, the technical progress achieved by the present application is as follows.

[0035] The production process of the stepped boosting fast displacement hydrogen long tube trailer provided by the present application comprises the steps of pre-displacement inspection, inspection of residual pressure, displacement of the vent line, switching to a sampling branch, opening of the valve for sampling, closing of the sampling valve, analysis of the sample, calculation of the maximum hydrogen estimation amount required for displacement, filling of high-purity hydrogen, displacement of the filling line, filling of the hydrogen long tube trailer, repeated filling, re-detection of the sample, and detection of whether the displacement result is qualified. The present application can quickly and efficiently and safely carry out the gas displacement of the tube bundle trailer hydrogen tank, can reduce the tube bundle trailer displacement time, reduce the hydrogen consumption during displacement, and reduce the average transportation cost of hydrogen. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 A schematic diagram of the process of the present application;

[0037] Wherein: 1, hydrogen long tube trailer, 2, total valve A, 3, total valve B, 4, first inlet valve, 5, high purity hydrogen source, 6, pressure reducing valve, 7, second inlet valve, 9, circulating valve, 10, sampling cylinder, 11, first needle valve, 12, second needle valve, 13, pressure gauge, 14, vent valve, 15, outlet valve, 16, first stop valve, 17, second stop valve, 18, vent line, 19, filling line, 20, emergency sampling port. DETAILED DESCRIPTION

[0038] The present application will be further described in detail below in conjunction with the accompanying drawings and specific examples.

[0039] A production process of a step-by-step boost fast replacement hydrogen long tube trailer, combined Figure 1 As shown, including hydrogen long tube trailer 1, first inlet valve 4, high purity hydrogen source 5, pressure reducing valve 6, second inlet valve 7, emergency sampling port 20, circulating valve 9, sampling cylinder 10, first needle valve 11, second needle valve 12, pressure gauge 13, vent valve 14, outlet valve 15, first stop valve 16, second stop valve 17, vent line 18, filling line 19. Hydrogen long tube trailer 1 is provided with total valve A 2 and total valve B 3.

[0040] A production process of a step-by-step boost fast replacement hydrogen long tube trailer 1, specifically comprising the following steps:

[0041] S1, checking the hydrogen long tube trailer 1 before replacement, specifically comprising the following steps:

[0042] S101, stop the vehicle and place the triangular sleeper properly.

[0043] S102, determine that the hydrogen long tube trailer 1 is in working condition.

[0044] S103, connect the hydrogen long tube trailer 1 with the static electricity elimination device.

[0045] S104, verify whether the tank inspection report, thermometer, pressure gauge 13 and other accessory inspections are within the valid period, check whether the filling valve, hose and joint threads, valve sealing surface, O-ring are intact, and conduct overall leak detection test.

[0046] S2, open the branch valve of all pipe bundles of the sealed sampler, check and record the residual pressure and temperature of the hydrogen long tube trailer 1.

[0047] S3, connect the venting pipeline 18 with the hydrogen long tube trailer 1 total valve A 2, and connect the other end of the venting pipeline 18 with the closed sampler, then open the total valve A 2 of the hydrogen long tube trailer 1, and vent the hydrogen in the hydrogen long tube trailer 1 for 30s to displace the gas in the venting pipeline 18.

[0048] S4, after displacement is completed, close the venting branch of the venting pipeline 18, and open the sampling branch. The venting branch of the venting pipeline 18 is provided with an emergency sampling port 20.

[0049] S5, connect the sampling steel cylinder 10 to the sampling branch of the closed sampler, open the inlet valve, pressure reducing valve 6, circulating valve and venting valve 14 in sequence, and observe the pressure gauge 13, when the hydrogen is reduced to 1-4 MPa pressure range, close the circulating valve 9, open the first needle valve 11 and the second needle valve 12 at both ends of the sampling steel cylinder 10, and carry out sampling.

[0050] S6, after the pressure gauge 13 of the closed sampler indicates stability, close the first needle valve 11 and the second needle valve 12 at both ends of the sampling steel cylinder 10, the inlet valve and the pressure reducing valve 6 in sequence.

[0051] S7, open the circulating valve 9, and after the system pressure is normal, close the circulating valve 9 and the venting valve 14.

[0052] S8, remove the sampling steel cylinder 10 and send it to the laboratory for analysis. The qualified indicators are: O2 detected in hydrogen ≤1.00 PPM, Ar content agreed by both parties, N2 ≤5 PPM, CO ≤1 PPM, CH4 ≤1 PPM, CO2 ≤1 PPM, H2O ≤3 PPM, total impurity content ≤10 PPM, and hydrogen purity ≥99.999%.

[0053] S9, analyze the worst indicators of the hydrogen long tube trailer 1 hydrogen detection, according to: worst indicator concentration x empty hydrogen volume = (worst indicator qualified concentration - concentration of corresponding component in displacement gas) x (displacement hydrogen volume + loaded hydrogen volume) to calculate the maximum hydrogen estimation amount required for displacement.

[0054] S10, connect the filling pipeline 19 with the total valve B 3 of the hydrogen long tube trailer 1, and connect the high-purity hydrogen source 5 with the filling pipeline 19.

[0055] S11, open the total valve B 3 of the hydrogen long tube trailer 1, and vent the hydrogen in the hydrogen long tube trailer 1 for 30s to displace the gas in the filling pipeline 19.

[0056] S12, open the filling pipeline 19 valve, start to fill the hydrogen long tube trailer 1, after filling, close the hydrogen long tube trailer 1 total valve B 3, the first inlet valve 4, the first stop valve 16 on the filling pipeline 19, open the hydrogen long tube trailer 1 total valve A 2, the second inlet valve 7, the pressure reducing valve 6, the second stop valve 17, the circulating valve 9, the outlet valve 15, the venting valve 14 on the venting pipeline 18, vent the hydrogen long tube trailer 1 built-in replacement hydrogen. Complete a complete replacement process, and record the replacement starting and ending pressure, temperature, for subsequent calculation of the amount of hydrogen used for replacement.

[0057] S13, repeat the filling steps of the above steps S9-12, fill 3-4 times at a filling pressure of 1-2 MPa; then fill 2-3 times at a filling pressure of 2-3 MPa; and then fill 1-2 times at a filling pressure of 3-5 MPa.

[0058] S14, after calculating the amount of hydrogen required for replacement, sample and detect the hydrogen in the tube bundle trailer again.

[0059] S15, after the replacement detection result is out, if it is qualified, the replacement is completed; if it is not qualified, continue to replace the hydrogen according to the third filling process condition until the hydrogen detection result is qualified, which is the replacement success.

Claims

1. A production process of a stepped boost quick replacement hydrogen gas long tube trailer, characterized by, Specifically comprising the following steps: S1, check the hydrogen long tube trailer (1) before replacement; S2, open the branch valve of all tube bundles of the sealed sampler, check and record the residual pressure and temperature of the hydrogen long tube trailer (1); S3, connect the venting pipeline (18) with the total valve A (2) of the hydrogen long tube trailer (1), and connect the other end of the venting pipeline (18) with the sealed sampler, then open the total valve A (2) of the hydrogen long tube trailer (1), release the hydrogen in the hydrogen long tube trailer (1) for 30s, and replace the gas in the venting pipeline (18); S4, after the replacement is completed, close the venting branch of the venting pipeline (18) and open the sampling branch; S5, connect the sampling steel cylinder (10) to the sampling branch of the sealed sampler, open the second inlet valve (7), the pressure reducing valve (6), the circulating valve (9) and the venting valve (14) in sequence, and observe the pressure gauge (13); when the hydrogen is reduced to the appropriate pressure range, close the circulating valve (9), open the first needle valve (11) and the second needle valve (12) at both ends of the sampling steel cylinder (10), and sample; S6, after the pressure gauge (13) of the sealed sampler indicates stability, close the first needle valve (11) and the second needle valve (12) at both ends of the sampling steel cylinder (10), the second inlet valve (7) and the pressure reducing valve (6) in sequence; S7, open the circulating valve (9), and after the system pressure decreases to normal, close the circulating valve (9) and the venting valve (14); S8, remove the sampling steel cylinder (10) and send it to the laboratory for analysis; S9, analyze the worst indicator of hydrogen detection of the hydrogen long tube trailer (1), and calculate the maximum hydrogen estimation amount required for replacement; The calculation formula in the step S9 is: worst indicator concentration × empty vehicle hydrogen volume = (worst indicator qualified required concentration - concentration of corresponding component in replacement gas) × (replacement hydrogen volume + loaded vehicle hydrogen volume); S10, connect the filling pipeline (19) with the total valve B (3) of the hydrogen long tube trailer (1) in good interface, and connect the high-purity hydrogen source (5) with the filling pipeline (19); S11, open the total valve B (3) of the hydrogen long tube trailer (1), release the hydrogen in the hydrogen long tube trailer (1) for 30s, and replace the gas in the filling pipeline (19); S12, open the valve of the filling pipeline (19), start filling the hydrogen long tube trailer (1), after filling is completed, close the valve of the total valve B (3) of the hydrogen long tube trailer (1) and the filling pipeline (19), open the valve of the total valve A (2) of the hydrogen long tube trailer (1) and the venting pipeline (18), and vent the hydrogen in the hydrogen long tube trailer (1) used for replacement; complete a complete replacement process, and record the pressure and temperature at the beginning and end of replacement, which is used for subsequent calculation of the amount of hydrogen used for replacement; S13, repeat the filling steps of the above steps S9-12, fill 3-4 times at a filling pressure of 1-2 MPa, then fill 2-3 times at a filling pressure of 2-3 MPa, and then fill 1-2 times at a filling pressure of 3-5 MPa; S14, after the calculation of the replacement hydrogen amount is completed, the hydrogen in the tube bundle vehicle is sampled and detected again; S15, after the replacement detection result, if qualified, replacement is completed; if unqualified, continue to carry out hydrogen replacement according to the third filling process condition until the hydrogen detection result is qualified, which is replacement success.

2. The production process of a stepped boost quick replacement hydrogen gas long tube trailer according to claim 1, characterized in that, The step S1 specifically comprises the following steps: S101, the vehicle is parked and the triangular sleeper is placed properly; S102, determine that the hydrogen long tube trailer anti-pulling open device is in working condition; S103, connect the hydrogen long tube trailer (1) with the static electricity elimination device; S104, verify whether the tank inspection report, thermometer, pressure gauge (13) and other accessory inspection are within the effective period, check the filling valve, hose and joint thread, valve sealing surface, O-ring, and carry out overall leak detection test.

3. The production process of a stepped boost quick replacement hydrogen gas long tube trailer according to claim 1, characterized in that: An emergency sampling port (20) is arranged on the venting branch of the venting pipeline (18) in the step S4.

4. The production process of a stepped boost quick replacement hydrogen gas long tube trailer according to claim 1, characterized in that: The appropriate pressure range is 1-4 MPa in the step S5.

5. The production process of a stepped boost quick replacement hydrogen gas long tube trailer according to claim 1, characterized in that: The analysis standard in the step S8 is: O2 in the hydrogen is ≤1.00 PPM, the content of Ar is agreed by the supplier and the demander, N2 is ≤5 PPM, CO is ≤1 PPM, CH4 is ≤1 PPM, CO2 is ≤1 PPM, H2O is ≤3 PPM, the total content of impurities is ≤10 PPM, and the purity of hydrogen is ≥99.999%.

6. The production process of a stepped boost quick displacement hydrogen gas long tube trailer according to claim 1, characterized in that: The valve on the filling pipeline (19) in the step S12 comprises a first inlet valve (4) and a first stop valve (16).

7. The production process of a stepped boost quick replacement hydrogen gas long tube trailer according to claim 1, characterized in that: The valve on the venting pipeline (18) in the step S12 comprises a second inlet valve (7), a pressure reducing valve (6), a second stop valve (17), a circulating valve (9), an outlet valve (15) and a venting valve (14).

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