RU2013101866A - METHOD FOR CLEANING FUEL TANK OF ROCKET BLOCKS FROM PARTICLES OF POLLUTION WHEN PREPARING THEM FOR BENCH TESTS - Google Patents

Abstract

1. The method of cleaning the fuel tanks of rocket blocks from particles of contaminants when preparing them for bench tests, which includes filling the tank with working fluid from the refueling bench tank, draining the working fluid from the tank into the drain bench tank, at the end of which the mass of particles of contaminants removed from the tank is determined, characterized in that after filling the tank with a working fluid, the mass of particles of contaminants entering the tank with the working fluid is determined, then the mass difference of the particles of contaminants removed from the tank during discharge and stepped into the tank during filling, determine the mass of particles of contaminants that were in the tank before filling it with a working fluid and removed when draining, and then spend the second cycle of filling the tank with working fluid and draining it from the tank to determine the mass of particles of contaminants entering the tank when filling with working liquid and being in the tank until the second filling with its working fluid and removed during the second discharge, then, taking into account the masses of particles of contamination that were in the tank before each filling with its working fluid and removed at each discharge, determine the mass of contaminant particles, which can be removed during subsequent filling-drain cycles and clean the tank until the specified contaminant content in the tank is reached, while a filling stand tank is used as a drain stand tank to drain the working fluid, and when filling, When draining from the tank, the working fluid is passed through process filters. 2. The method according to claim 1, characterized in that the tank is filled with a working fluid through a filling pipe with flow measurement and continuous

Claims (3)

1. The method of cleaning the fuel tanks of rocket blocks from particles of contaminants when preparing them for bench tests, which includes filling the tank with working fluid from the refueling bench tank, draining the working fluid from the tank into the drain bench tank, at the end of which the mass of particles of contaminants removed from the tank is determined, characterized in that after filling the tank with a working fluid, the mass of particles of contaminants entering the tank with the working fluid is determined, then the mass difference of the particles of contaminants removed from the tank during discharge and stepped into the tank during filling, determine the mass of particles of contaminants that were in the tank before filling it with a working fluid and removed when draining, and then spend the second cycle of filling the tank with working fluid and draining it from the tank to determine the mass of particles of contaminants entering the tank when filling with working liquid and being in the tank until the second filling with its working fluid and removed during the second discharge, then, taking into account the masses of particles of contamination that were in the tank before each filling with its working fluid and removed at each discharge, determine the mass of contaminant particles, which can be removed during subsequent filling-drain cycles and clean the tank until the specified contaminant content in the tank is reached, while a filling stand tank is used as a drain stand tank to drain the working fluid, and when filling, draining from the tank, the working fluid is passed through process filters. 2. The method according to claim 1, characterized in that the tank is filled with a working fluid through a filling pipe with a flow measurement and continuous sampling of a portion of the liquid from the filling pipe to the selection line through a control filter with a flow measurement and returning the filtered liquid to the filling pipe, and the mass particles of contaminants entering the tank with the working fluid, is determined taking into account the volume of fluid determined by the measured values of the flow rate, according to the formula $$M_{H\mathrm{one}}=m_{2H\mathrm{one}}{k}_{tH}\left(\frac{V_{0H\mathrm{one}}}{V_{2H\mathrm{one}}}-\mathrm{one}\right)$$

, where M _H1 is the mass of particles of contaminants in the liquid passed into the tank through the filling pipeline during the first filling, m _2H1 is the mass of particles of contaminants in the liquid passed through the pipe for selection of the filling pipe deposited on the control filter of the pipe selection pipe for the first filling, V _0H1 - the volume of liquid passed through the filling pipeline to the tank during the first filling, V _2H1 - the volume of liquid passed through the sampling line from the filling pipeline, a control filter of the sampling line and returned to the pipeline filling behind the throttle device during the first filling of the tank, k _tH - correction factor; the working fluid is drained from the tank through a drain pipe with flow measurement and the continuous selection of part of the liquid from the drain pipe to another sampling line through a control filter with a measurement of its flow rate and the return of the filtered liquid to the drain pipe, and the mass of particles of contaminants removed from the tank is determined with taking into account the volume of liquid determined by the measured values of the flow rate, according to the formula $$M_{C\mathrm{one}}=m_{2C\mathrm{one}}{k}_{tC}\left(\frac{V_{0C\mathrm{one}}}{V_{2C\mathrm{one}}}-\mathrm{one}\right)$$

, where M _C1 is the mass of particles of contaminants in the liquid passing through the drain pipe from the tank at the first discharge, m _2C1 is the mass of particles of contaminants in the liquid passing through the drain pipe, and deposited on the control filter of the drain pipe at the first drain, V _0C1 - the volume of liquid passed through the drain pipe from the tank at the first drain, V _2C1 - the volume of liquid passed through the drain pipe from the drain pipe, the control filter of the sampling line and returned to the drain pipe behind the throttle device, k _tC - correction factor; moreover, the mass of particles of contaminants ΔM ₁ , which were in the tank before filling it with a working fluid and removed when draining from the tank, is determined by the formula $$\Delta M_{\mathrm{one}}=M_{C\mathrm{one}}+m_{2C\mathrm{one}}-M_{H\mathrm{one}}$$

; after the second cycle of filling the tank with a working fluid and draining it from the tank, determine the mass of particles of contaminants entering the tank with the working fluid during the second filling, and the mass of particles of contaminants removed from the tank during the second discharge, taking into account the volumes of liquid determined by the measured flow rates, according to the formulas $$M_{H2}=m_{2H2}{k}_{tH}\left(\frac{V_{0H2}}{V_{2H2}}-\mathrm{one}\right)$$

, $$M_{C2}=m_{2C2}{k}_{tC}\left(\frac{V_{0C2}}{V_{2C2}}-\mathrm{one}\right)$$

, where M _H2 is the mass of particles of contaminants in the fluid passing through the filling pipe during the second filling of the tank, m _2H2 is the mass of particles of contaminants in the liquid passing through the pipe of the filling pipe deposited on the control filter of the selection pipe of the filling pipe during the second filling of the tank, V _0H2 - the volume of fluid passing through the pipeline filling the tank at a second filling, V _2H2 - volume of liquid held by the selection of the filling pipe line, the control line selection filter, and returned to the trubop botfly filling of the throttling device in the second tank is filled, k _tH - correction factor, M _C2 - mass of contaminant particles in the fluid passing through conduit discharging at the second sink, m _2C2 - weight contaminant particles in a fluid passed through line selection drain line, and deposited on the control filter of the drain pipe selection line during the second discharge of liquid from the tank, V _0C2 is the volume of liquid passed through the drain pipe from the tank during the second liquid discharge from the tank, V _2C2 is the volume of liquid passed through the selection pipe from the drain pipe and returned to the drain pipe after the throttle device during the second discharge of liquid from the tank, k _tC - correction factor, determine the mass of particles of contaminants ΔM ₂ that were in the tank until the second filling it with a working fluid and removed during the second discharge from the tank, according to the formula $$\Delta M_2=M_{C2}+m_{2C2}-M_{H2}$$

, using the obtained values ΔM ₁ , ΔM ₂ are the equations that determine the dependence of the mass of particles of contaminants removed from the tank on the volume of liquid used, for the first cleaning cycle: $$\frac{\Delta M_{\mathrm{one}}}{\Delta M_0}=\mathrm{one}-\frac{\mathrm{one}}{e^{A_0{V}_{0H\mathrm{one}}}}$$

, for the second cleaning cycle: $$\frac{\Delta M_{\mathrm{one}}+\Delta M_2}{\Delta M_0}=\mathrm{one}-\frac{\mathrm{one}}{e^{A_0\left(V_{0H\mathrm{one}}+V_{0H2}\right)}}$$

, as a result of the solution of which the constants ΔM ₀ , A ₀ (ΔM ₀ is the initial content of contaminants in the system) are determined constant (at selected cleaning modes), after which the mass of contaminant particles ΔM, which can be removed during subsequent cleaning cycles using the volume of working fluid, is determined V _0H , by the equation $$\frac{\Delta M_{\mathrm{one}}+\Delta M_2+\Delta M}{\Delta M_0}=\mathrm{one}-\frac{\mathrm{one}}{e^{A_0\left(V_{0H\mathrm{one}}+V_{0H2}+V_{0H}\right)}}$$

and conduct tank cleaning to an acceptable value for the content of contaminants. 3. The method according to claim 2, characterized in that the flow conditions of the working fluid are preliminarily sequentially adjusted in the sections of the filling and discharge pipelines and in the corresponding lines for selecting a portion of the liquid to establish conditions for equal liquid velocities in the intake elements of the sampling devices and in the sections of the filling pipelines and discharge at the places of installation in them of devices for the selection of a part of the liquid by spilling them with the working fluid, measuring the flow rates of liquids in them, determining the mass of particles of contaminants deposited and control filter pipe sections fill and drain lines, and selection of the liquid, with which, taking into account the volume of liquid defined by the measured values of the costs determined correction coefficients k _tH, k _tC by formulas $$k_{tH}=\frac{m_{\mathrm{one}tH}}{m_{2tH}\left(\frac{V_{0tH}}{V_{2tH}}-\mathrm{one}\right)}$$

, $$k_{tC}=\frac{m_{\mathrm{one}tC}}{m_{2tC}\left(\frac{V_{0tC}}{V_{2tC}}-\mathrm{one}\right)}$$

, where m _1tH is the mass of contaminant particles in the fluid passing through the filling pipeline section during adjustment and deposited on the control filter of the drain line, m _2tH is the mass of contaminant particles in the fluid passing through the sampling pipe deposited on the control filter of the selection line for the selection of the filling pipeline section at setting, V _0tH is the volume of liquid passing through the filling pipeline section during tuning, V _2tH is the volume of liquid passing through the filling pipe section during tuning, m _1tC is the particle mass n in the liquid passing through the drain pipe section during adjustment and deposited on the control filter of the drain line, m _2tC is the mass of contaminants in the liquid passing through the sampling pipe deposited on the control filter in the drain line during the adjustment, V _0tC is the volume the fluid _flowing through the drain pipe section during adjustment, V _2tC is the volume of fluid _flowing through the drain pipe selection pipe during adjustment.