Device for the storage and supply of cryogenic products

 

(57) Abstract:

The invention relates to cryogenic engineering and is intended for storage and supply of cryogenic products to consumers, can be used in the national economy, for example, during transportation of cryogenic products in containers of different modes of transport. The device comprises a heat-insulated container, secured in a vacuum-tight casing, drain and gas piping with shutoff valves that between the cover and shut-off valves docked connecting pipe containing a heat exchanger-evaporator and the valve to which after the heat exchanger-evaporator docked selected piping with shutoff valve on the end of the drain pipe inside the tank attached to the collector, made in the form of an annular perforated pipe, the cavity of which is connected radial pipe with cavity drainage pipeline. In the cavity of the vessel entered a float made of heat conducting material mounted with the formation of a uniform annular gap between the inner surface and end surface of the float with the area of the orifice is not less than or equal to the square of the parties, converted to float and the surface of the collector on this side provided with evenly spaced on her bounding ridges. The problem of minimizing the time of rise of the pressure of the stored cryogenic product to the working level and to minimize the loss of cryogenic product when stored in containers with open drainage. 1 Il.

The invention relates to the field of cryogenic engineering and is intended for storage and supply of cryogenic products to consumers, such as oxygen, stored in two-phase condition in the electrochemical generator (ECG) power plant (power plant) on the basis of hydrogen-oxygen fuel cells designed for operation in conditions of gravity.

A device for the storage and supply of cryogenic products to consumers (see "Questions of deep cooling", a collection of articles edited by M. P. Malkov, M. , Publishing house of foreign literature, 1961, page 308, Fig. 22) containing the heat-insulated container, secured in a vacuum-tight casing, drain and gas piping with shutoff valves that between the cover and shut-off valves docked connecting pipe containing tipod with shut-off valve.

The above solution has the following disadvantages:

- does not allow you to minimize the rise time of the pressure from the pressure of the filling to the working level. This is because when the rise in pressure in the device by blowing warm gas from the heat exchanger-condenser in the gas cushion is a direct effect of the gas jet on the surface of the liquid, which leads to the formation of a crater and turbulence in the liquid. The result is to raise the temperature of the surface layer of the liquid, which determines the pressure in the tank, you want to heat a large mass of liquid and not a thin layer, which requires a large consumption of gas and a significant amount of time. This time determines the readiness of the device to the issuance of a cryogenic product to the consumer within a given tolerance range of pressures, for example, in the ECG power plant installed at sites where the ready time is a significant factor;

- does not prevent penetration of the liquid phase of the cryogenic product while bending capacity in the cavity of the drainage pipe when stored in containers with open drainage. This mode of the device comprising the EC, i.e., drainage evaporating due to heat gains from the environment and rsta drainage pipeline can be liquid, and in the selection of fluid loss cryogenic product will be significantly larger than in the selection pair, so during storage of cryogenic products with open drainage losses can be a significant amount that will result in the inability to perform the planned work program.

It is also known a device for the storage and supply of cryogenic products, adopted as a prototype (see the book N.In. Filin, A. B. Bulanov, "Liquid cryogenic systems", Leningrad: Mashinostroenie, 1985, page 43, Fig. 2.14). The device comprises a heat-insulated container, secured in a vacuum-tight casing, drain and gas piping with shutoff valves that between the cover and shut-off valves docked connecting pipe containing a heat exchanger-evaporator and the valve to which after the heat exchanger-evaporator docked select a pipeline from the intake valve, and at the end of the drain pipe inside the tank attached to the collector, made in the form of an annular perforated pipe in which the perforation holes are on top.

In the prototype, compared to similar, thanks to the installation at the end of the drainage pipe ring stvennoe the influence of the gas jets on the surface of the liquid and provides a uniform flow of gas in the vapor space of the vessel. The outflow of gas is in the form of individual jets upwards and stopping near the wall of the dome. Input gas pressurization, heat is transferred to the wall of the dome, where the conductivity is partially transferred to the surface layer of a liquid and partially transmitted through the vessel wall and from it is given to the bulk liquid. Although this device and there is no turbulence in the liquid near the surface, warming of the surface layer to the desired temperature, which defines the desired working pressure in the vessel, a significant, because not all of the heat supplied by gas pressurization goes to warming of the surface layer and, in addition, the supply of heat by conduction from the walls of the dome is less intensive than the immediate impact of the gas on the liquid surface.

When transporting the same as in the prototype, you can zaplakivayu fluid into the perforations of the collector, which can lead to significant losses for the cryogenic product when stored in containers with open drainage. Thus, the prototype has the same drawbacks as similar, only their influence reduced.

The present invention is to minimize the rise time of the pressure Hrankov the tee with open drainage.

The invention consists in that in the cavity of the vessel, a device for the storage and supply of cryogenic products containing thermally insulated container, secured in a vacuum-tight casing, drain and gas piping with shutoff valves that between the covers and shut-off valves docked connecting pipe containing a heat exchanger-evaporator and the valve to which after the heat exchanger-evaporator docked selected piping with shutoff valve on the end of the drain pipe inside the tank attached to the collector, made in the form of an annular perforated pipe, the cavity of which is connected radial pipe with cavity drainage pipe, put the float, made of heat conducting material mounted with the formation of a uniform annular gap between the inner surface and end surface of the float with the area of the orifice is not less than or equal to the cross-section area of the drainage pipe, with the sprocket holes of the collector are located on the side facing the float and the surface of the collector on this side provided with evenly spaced on the STN to date technical solutions, the newly created device for the storage and supply of cryogenic products helps to minimize the rise time of the pressure of the stored cryogenic product to the working level and to minimize the loss of cryogenic product when stored in containers with open drainage.

This is achieved by introducing into the cavity capacity float, made of heat-conductive material such as aluminum. To hold the metal float afloat in a cryogenic liquid such as liquid oxygen, the density of which is less than the density of aluminum, the float is made in the form of thin plates welded to the hollow duct. The float in the tank with the formation of a uniform annular gap between the inner surface and end surface of the float. Of conditions prevent zaplesnevelye fluid into the perforations of the collector gap should be minimal, but the cross-sectional area of the gap should be not less than the cross-section area of the drainage pipe. If on the basis of the equality of the areas of flow sections the size of the gap will be unacceptably low, i.e., to be structurally invalid value, it made structurally the side, facing the surface of the liquid, and the size of the perforations on the radial pipes decreases from the center to the periphery with a view to ensuring uniform pressurization gas to the nozzles located on radial lines, and the ring. To prevent overlapping perforations float and, therefore, blocking the outlet of the cryogenic product through the drain pipe on the surface of the collector from the side adjacent to the float, evenly spaced bounding ridges.

This structural embodiment of the device for storage and supply of cryogenic products allows minimizirovatj the rise time of the stored cryogenic product to the working level and, consequently, to minimize the time of preparation of cryogenic product within the specified tolerance range to the consumer, for example in the ECG EU. This is ensured by the fact that nadoway in the vapor space of the vessel warm gas expires in the form of individual jets and uniformly bathes the entire surface of the float. All supplied with gas heat is transferred to the surface of the thin-walled vysokoteploprovodnyh plates float and from there to the surface of the liquid. The temperature of the surface ldoa fluid. While bending capacity, for example during transportation, the liquid will not enter into the openings of the collector, because, passing through the narrow gap, it loses its kinetic energy and will not reach the holes. Therefore, when the storage of cryogenic products with open drainage will only be selected pairs, the consumption of which is known and is determined by the heat gain from the environment.

The invention is illustrated by the drawing, which shows a diagram of the device.

The device comprises a container 1, on the surface of which is vacuum - deposited multilayer insulation 2. The container 1 is fixed in a vacuum-tight casing 3 poles 4. The device is provided with a pipeline refills 5 with shut-off valve 6 and the drainage piping 7 with shut-off valve 8. To the pipeline refills 5 in the area between the casing 3 and the shut-off valve 6 is docked connecting pipe 9, through which sequentially installed shut-off valve 10, the heat exchanger-evaporator 11 and the shut-off valve 12 is docked with the other end to the drain pipe 7 in the area between the casing 3 and the shut-off valve 8. To the connecting pipe 9 in the section between the heat exchanger-evaporator 11 and shut-off valve 12 pastikova the Noah plate 16 of conductive material, for example, aluminum, is welded to the hollow duct 17. Between the end surface of the float 15 and the inner surface of the container 1 is formed of a uniform annular gap 18. At the end of the drain pipe 7 located inside the container 1, the fixed manifold 19, made in the form of an annular tube 20, the cavity of which is connected with the cavity of the drain pipe 7 radial pipes 21. Ring pipe 20 and the radial pipes 21 provided with perforations 22, which are located on the side facing the float 15. On the same side surface of the collector 19 is supplied evenly placed on it the limiting protrusions 23. On the manifold 19 from the side adjacent to the float 15, a temperature sensor 24.

The device operates as follows.

Open shut-off valves 6, 8 and is filling the tank 1 cryogenic product, for example, oxygen to the overflow, i.e., when the drain pipe 7 enters the liquid, the contact which is fixed by a rapid temperature drop in the drain pipe. Then closes the valve 6 gas pipeline 5 and performed an excerpt capacity with open drainage until then,will not increase by ~3o.

This means that the collector 19 to restrictive protrusions 23 is in the zone pair and between the float 15 and the collector 19 is formed steam layer. Further, if the conditions of operation of the auxiliary power plant is not required, then the shut-off valve 8 remains open and through the drain pipe 7 is selection of vapor evaporating due to the heat leakage from the ambient cryogenic product. While bending capacity when transporting the liquid will not enter into the openings 22 of the collector 19, because when passing through a narrow annular gap 18 it loses its kinetic energy and is easy to wash the surface of the float 15, addressed to the collector 19. As a result, when the container 1 in this mode, the fluid from the drain pipe to discharge will not be that will ensure minimal loss of cryogenic product, because the drain in the process of working capacity with open drainage exhaust mass cryogenic product will be more in many times, how much the density of the liquid phase exceeds the density of the vapor phase.

If you want to work EU, it is necessary to raise the pressure in the tank 1 to the desired level, for example 8 kgf/cm2(the lower operating level). For this sassily of gravity in the heat exchanger-evaporator 11 (through it all the time pumped fluid), where the liquid evaporates first, and then heated to above freezing temperatures and heated through the connecting pipe 9 and the drain 7 enters the collector 19, where through the perforations 22 is supplied to the surface of the float 15.

Flow of hot gas is washed by the plate 16 evenly over the entire surface. Gas in contact with the surface of the plate 16 is condensed at the condensation heat, which, together with the heat obtained by cooling the gas to a temperature of a liquid is the temperature of the plate 16 and, therefore, the temperature on the surface of the liquid, since thermal resistance of the thin vysokoteploprovodnyh plate 16 of the float 15 is almost equal to zero.

As a result, due to the intense heat, the temperature of the surface layer of the liquid increases rapidly, resulting in increasing pressure in the vessel, and after the increase to the lower working level, there is the opening of the shut-off valve 14 to select the pipe 13 and the selection cryogenic product ECG EU. Over time the bulk of the liquid in the tank is heated by heat leakage from the environment and after raising the temperature of the primary fluid mass to urovesa, and the pressurization gas in the steam space is terminated. The valve 10 in the selection process in the ECG EU remains open. In the selection process depending on the flow rate, the pressure may remain constant, increase or decrease. In the case of downward pressure to the lower working level opens the valve 12 and is blowing warm gas in the vapor space of the vessel 1 to increase its pressure to the upper working level, for example 12 kgf/cm2after which the valve 12 is closed.

Thus, the set of new features that are absent in the known technical solutions, enables a new technical result is to minimize the rise time of the pressure of the stored cryogenic product to the working level and to minimize the loss of cryogenic product when stored in containers with open drainage.

Device for the storage and supply of cryogenic products containing thermally insulated container, secured in a vacuum-tight casing, drain and gas piping with shutoff valves that between the cover and shut-off valves docked connecting pipe containing a heat exchanger-evaporator and the valve, to cat the aqueous piping inside the tank attached to the manifold, made in the form of an annular perforated pipe, the cavity of which is connected radial pipe with cavity drainage pipeline, characterized in that the cavity of the vessel entered a float made of heat conducting material mounted with the formation of a uniform annular gap between the inner surface and end surface of the float with the area of the orifice is not less than or equal to the cross-section area of the drainage pipe, with the sprocket holes of the collector are located on the side facing the float and the surface of the collector on this side provided with evenly spaced on her bounding ridges.

 

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Drain device // 2260741

FIELD: cryogenic engineering.

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EFFECT: enhanced reliability.

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EFFECT: simplified design and reduced power consumption.

26 cl, 15 dwg

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EFFECT: increased reliability of gas leakage determination without cylinder weighting.

17 cl, 6 dwg

FIELD: cryogenic engineering.

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EFFECT: possibility for keeping integrity of vessels filled with liquid expanded at low temperature at transporting them.

4 cl, 4 dwg

FIELD: storing or distributing gases or liquids.

SUBSTANCE: station comprises pressure-tight vessel filled with liquefied hydrocarbon gas, communications for connection of the vessel with the gas distributing column through the actuating mechanisms, and system for control of gas leakage. The system for control of the gas leakage comprises the device for control of the weight of the vessel with the pickup of weight, unit for control of the flow rate of liquefied hydrocarbon gas, converter for converting the electric signal to the frequency characteristic, adder, analyzer, and unit for control of the actuating mechanisms. The output signal from the weight pickup is fed to the input of the converter. The outputs of the flow rate unit is connected with the first input of the adder whose second input receives the signal from the converter. The output of the adder is connected with the first input of the analyzer whose second input is connected with the output of the converter. The output of the analyzer is connected with the unit for control of actuating mechanisms.

EFFECT: enhanced safety and reliability.

23 cl, 2 dwg

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EFFECT: enhanced safety.

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FIELD: storing or distributing gases or liquids.

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EFFECT: enhanced reliability.

1 cl, 1 dwg

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EFFECT: facilitated servicing due to simplified construction.

2 cl, 1 dwg

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