Device for online switching between VPSA (Vacuum Pressure Swing Adsorption) oxygen generation system and liquid oxygen system

Abstract

The utility model relates to the technical field of VPSA (Vacuum Pressure Swing Adsorption) oxygen generation, in particular to an online switching device for a VPSA oxygen generation system and a liquid oxygen system. Comprising a VPSA oxygen production check valve, a VPSA oxygen production stop valve, a low-temperature liquid storage tank, a vaporizer, VPSA oxygen production equipment, a VPSA oxygen production control center, oxygen using equipment, a first control piece, a second control piece, a pneumatic stop valve and a throttling valve. According to the design, seamless switching between liquid oxygen and VPSA oxygen production is controlled through the pneumatic stop valve; the VPSA oxygen production equipment is used for producing gaseous oxygen, and the VPSA oxygen production control center is used for controlling the operation of the gaseous oxygen production equipment and also used for controlling the opening and closing of the pneumatic stop valve; the VPSA oxygen production check valve and the VPSA oxygen production stop valve prevent liquid oxygen from flowing back to the VPSA oxygen production system through the connecting pipeline when the liquid oxygen is started, seamless connection of the liquid oxygen equipment and the VPSA oxygen production equipment is achieved, and the liquid oxygen equipment is automatically started to supply oxygen when the VPSA oxygen production equipment is shut down or overhauled due to faults.

Description

TECHNICAL FIELD

[0001] The utility model relates to VPSA oxygen making technical field especially relates to a kind of VPSA oxygen making system and the device of online switching of liquid oxygen system. BACKGROUND

[0002] Although VPSA oxygen making equipment has the advantages of high efficiency, energy saving, any mechanical equipment can occur failure or need to be maintained, equipped with liquid oxygen device as backup, can ensure that when main oxygen making equipment problem, system can continue to provide stable oxygen supply, meet production or medical needs, in certain circumstances, such as power interruption, equipment failure, VPSA oxygen making equipment can not work normally, liquid oxygen device can be quickly started in these emergency situations, provide necessary oxygen support, ensure safety and production are not affected.

[0003] But, since how VPSA oxygen making equipment and liquid oxygen device can realize seamless connection is the most concerned problem at present, once VPSA oxygen making equipment failure shutdown, traditional method needs on-duty personnel to quickly arrive at liquid oxygen station and manually open valve to supply oxygen, such method is not only time-consuming and laborious, and even if can supply oxygen, the time difference in between will lead to unstable oxygen supply, influence the operation of oxygen-using equipment. UTILITY MODEL CONTENTS

[0004] The utility model is aimed at providing a kind of VPSA oxygen making system and the device of online switching of liquid oxygen system, to solve the technical problem in prior art, since how VPSA oxygen making equipment and liquid oxygen device can realize seamless connection is the most concerned problem at present, once VPSA oxygen making equipment failure shutdown, traditional method needs on-duty personnel to quickly arrive at liquid oxygen station and manually open valve to supply oxygen, such method is not only time-consuming and laborious, and even if can supply oxygen, the time difference in between will lead to unstable oxygen supply, influence the operation of oxygen-using equipment.

[0005] In order to achieve the above object, the utility model discloses a kind of VPSA oxygen production system and liquid oxygen system on-line switching device, including VPSA oxygen production check valve, VPSA oxygen production stop valve, cryogenic liquid storage tank, vaporizer, VPSA oxygen production equipment, VPSA oxygen production control center and oxygen equipment, first control piece is provided between the cryogenic liquid storage tank and the vaporizer, second control piece is provided between the vaporizer and the oxygen equipment, pneumatic cut-off valve and throttle valve are provided between the second control piece and the oxygen equipment, and the VPSA oxygen production control center is connected with the pneumatic cut-off valve, the VPSA oxygen production check valve is connected with the VPSA oxygen production equipment, and is located the oxygen outlet end of the VPSA oxygen production equipment, the VPSA oxygen production stop valve is connected with the VPSA oxygen production check valve, and is located the export end of the VPSA oxygen production check valve, and the VPSA oxygen production stop valve is connected between the import end of the pneumatic cut-off valve and the import end of the throttle valve.

[0006] Among them, the first control piece includes first liquid oxygen discharge valve, second liquid oxygen discharge valve and cryogenic long handle stop valve.

[0007] Among them, the first liquid oxygen discharge valve is communicated at the liquid outlet end of the cryogenic liquid storage tank and the import end of the second liquid oxygen discharge valve, the second liquid oxygen discharge valve is communicated at the outlet end of the first liquid oxygen discharge valve and the import end of the cryogenic long handle stop valve, and the cryogenic long handle stop valve is communicated at the outlet end of the second liquid oxygen discharge valve and the import end of the vaporizer.

[0008] Among them, the second control piece includes cryogenic ball valve, oxygen outlet filter, first normal temperature stop valve, self-operated pressure regulating valve and second normal temperature stop valve.

[0009] Among them, the cryogenic ball valve is communicated at the outlet end of the vaporizer and the import end of the oxygen outlet filter, the oxygen outlet filter is communicated at the outlet end of the cryogenic ball valve and the import end of the first normal temperature stop valve, the first normal temperature stop valve is communicated at the outlet end of the oxygen outlet filter and the import end of the self-operated pressure regulating valve, the self-operated pressure regulating valve is connected at the outlet end of the first normal temperature stop valve and the import end of the second normal temperature stop valve, and the second normal temperature stop valve is communicated at the import end of the self-operated pressure regulating valve and the import end of the pneumatic cut-off valve.

[0010] The utility model discloses a kind of VPSA oxygen generation system and liquid oxygen system on-line switching device, including VPSA oxygen generation check valve, VPSA oxygen generation stop valve, cryogenic liquid storage tank, vaporizer, VPSA oxygen generation equipment, VPSA oxygen generation control center and oxygen equipment, first control piece is provided between the cryogenic liquid storage tank and the vaporizer, second control piece is provided between the vaporizer and the oxygen equipment, pneumatic cut-off valve and throttle valve are provided between the second control piece and the oxygen equipment, the seamless switching of liquid oxygen and VPSA oxygen generation is controlled by the pneumatic cut-off valve in the design;The VPSA oxygen generation equipment produces gaseous oxygen, the VPSA oxygen generation control center controls the operation of gaseous oxygen production equipment, also used to control the opening and closing of the pneumatic cut-off valve;The VPSA oxygen generation check valve and the VPSA oxygen generation stop valve prevent liquid oxygen from flowing back to VPSA oxygen generation system when liquid oxygen is enabled, to realize the seamless connection of liquid oxygen equipment and VPSA oxygen generation equipment, when VPSA oxygen generation equipment fails to stop or overhaul, oxygen is supplied by automatically opening liquid oxygen equipment, in this way, effectively solve the problem that how VPSA oxygen generation equipment and liquid oxygen device can realize seamless connection is the most concerned problem currently, once VPSA oxygen generation equipment fails to stop, the traditional method needs on-duty personnel to quickly reach liquid oxygen station and manually open valve to supply oxygen, such method not only time-consuming and laborious, but even if oxygen can be supplied, the time difference in between will lead to unstable oxygen supply, affect the operation of oxygen equipment technical problem. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, without creative labor, other drawings can also be obtained according to these drawings.

[0012] Figure 1 It is the principle diagram of the VPSA oxygen generation system and liquid oxygen system on-line switching device of the utility model.

[0013] 1-cryogenic liquid storage tank, 2-first liquid oxygen discharge valve, 3-second liquid oxygen discharge valve, 4-low temperature long handle stop valve, 5-vaporizer, 6-low temperature ball valve, 7-oxygen outlet filter, 8-first normal temperature stop valve, 9-self-operated pressure regulating valve, 10-second normal temperature stop valve, 11-pneumatic cut-off valve, 12-throttle valve, 13-oxygen equipment, 14-VPSA oxygen generation equipment, 15-VPSA oxygen generation control center, 16-VPSA oxygen generation check valve, 17-VPSA oxygen generation stop valve. DETAILED DESCRIPTION

[0014] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein like reference numerals refer to like elements or elements with similar functions throughout the figures. The embodiments described below are exemplary in nature, and are intended to be illustrative of the present application rather than to limit the present application. Brief Description of the Drawings

[0015] Referring to Figure 1 The utility model provides a kind of VPSA oxygen production system and liquid oxygen system on-line switching device, including VPSA oxygen production check valve 16, VPSA oxygen production stop valve 17, cryogenic liquid storage tank 1, vaporizer 5, VPSA oxygen production equipment 14, VPSA oxygen production control center 15 and oxygen equipment 13, first control piece is provided between the cryogenic liquid storage tank 1 and the vaporizer 5, second control piece is provided between the vaporizer 5 and the oxygen equipment 13, pneumatic cut-off valve 11 and throttle valve 12 are provided between the second control piece and the oxygen equipment 13, and the VPSA oxygen production control center 15 is connected with the pneumatic cut-off valve 11, the VPSA oxygen production check valve 16 is connected with the VPSA oxygen production equipment 14, and is located at the oxygen outlet end of the VPSA oxygen production equipment 14, the VPSA oxygen production stop valve 17 is connected with the VPSA oxygen production check valve 16, and is located at the outlet end of the VPSA oxygen production check valve 16, and the VPSA oxygen production stop valve 17 is connected between the inlet end of the pneumatic cut-off valve 11 and the inlet end of the throttle valve 12.

[0016] In the embodiment, the design controls seamless switching of liquid oxygen and VPSA oxygen production by the pneumatic cut-off valve 11; the VPSA oxygen production equipment 14 produces gaseous oxygen, the VPSA oxygen production control center 15 controls the operation of the gaseous oxygen production equipment, and is also used to control the opening and closing of the pneumatic cut-off valve 11; the VPSA oxygen production check valve 16 and the VPSA oxygen production stop valve 17 prevent liquid oxygen from flowing back to the VPSA oxygen production system through the connecting pipeline when liquid oxygen is used, so as to realize seamless connection of the liquid oxygen equipment and the VPSA oxygen production equipment 14. When the VPSA oxygen production equipment 14 fails or is under maintenance, the liquid oxygen equipment is automatically opened to supply oxygen. In this way, the problem of how to realize seamless connection between the VPSA oxygen production equipment 14 and the liquid oxygen device is effectively solved. Once the VPSA oxygen production equipment 14 fails, the traditional method requires an on-duty personnel to quickly go to the liquid oxygen station to manually open the valve to supply oxygen. This method is not only time-consuming and labor-intensive, but also even if oxygen can be supplied, the time difference will cause unstable oxygen supply and affect the operation of the oxygen equipment 13.

[0017] Further, the first control piece includes a first liquid oxygen discharge valve 2, a second liquid oxygen discharge valve 3 and a cryogenic long-handle stop valve 4.

[0018] In the embodiment, the first liquid oxygen discharge valve 2, the second liquid oxygen discharge valve 3 and the low-temperature long-handle stop valve 4 cooperate together to accurately control the discharge and flow direction of the liquid oxygen, and ensure the safe and stable operation of the liquid oxygen system.

[0019] Further, the first liquid oxygen discharge valve 2 is communicated with the liquid outlet end of the low-temperature liquid tank 1 and the inlet end of the second liquid oxygen discharge valve 3, the second liquid oxygen discharge valve 3 is communicated with the outlet end of the first liquid oxygen discharge valve 2 and the inlet end of the low-temperature long-handle stop valve 4, and the low-temperature long-handle stop valve 4 is communicated with the outlet end of the second liquid oxygen discharge valve 3 and the inlet end of the vaporizer 5.

[0020] Further, the second control member comprises a low-temperature ball valve 6, an oxygen outlet filter 7, a first normal-temperature stop valve 8, a self-operated pressure regulating valve 9 and a second normal-temperature stop valve 10.

[0021] In the embodiment, the low-temperature ball valve 6 and the normal-temperature stop valve are used to control the flow and cut-off of oxygen, the oxygen outlet filter 7 can filter out impurities in oxygen to improve the purity of oxygen, and the self-operated pressure regulating valve 9 can automatically adjust the pressure of oxygen to ensure that oxygen is supplied to the oxygen-using equipment 13 at a suitable pressure.

[0022] Further, the low-temperature ball valve 6 is communicated with the outlet end of the vaporizer 5 and the inlet end of the oxygen outlet filter 7, the oxygen outlet filter 7 is communicated with the outlet end of the low-temperature ball valve 6 and the inlet end of the first normal-temperature stop valve 8, the first normal-temperature stop valve 8 is communicated with the outlet end of the oxygen outlet filter 7 and the inlet end of the self-operated pressure regulating valve 9, the self-operated pressure regulating valve 9 is connected to the outlet end of the first normal-temperature stop valve 8 and the inlet end of the second normal-temperature stop valve 10, and the second normal-temperature stop valve 10 is communicated with the inlet end of the self-operated pressure regulating valve 9 and the inlet end of the pneumatic cut-off valve 11.

[0023] In the embodiment, the pneumatic cut-off valve 11 can rapidly cut off the supply of oxygen in an emergency to protect the oxygen-using equipment 13 and personnel safety, and the throttle valve 12 can control the flow of oxygen to ensure that oxygen is supplied to the oxygen-using equipment 13 at a suitable flow rate.

[0024] In the utility model, liquid oxygen is stored in the low temperature liquid storage tank 1, liquid oxygen enters the vaporizer 5 by the first liquid oxygen discharge valve 2, the second liquid oxygen discharge valve 3 and the low temperature long handle stop valve 4 and is gasified into gaseous oxygen, and then is adjusted to the oxygen pressure required by the customer between the low temperature ball valve 6, the first normal temperature stop valve 8, the self-operated pressure regulating valve 9 and the second normal temperature stop valve 10, under normal circumstances, the VPSA oxygen production equipment 14 is used to produce oxygen, the oxygen production check valve, the VPSA oxygen production stop valve 17 and the throttle valve 12 keep open state, the pneumatic cut-off valve 11 keeps closed state, the liquid oxygen discharge valve to the second normal temperature stop valve 10 keeps open state in turn;When the VPSA oxygen production equipment 14 fails to stop, the VPSA oxygen production control center 15 receives the stop signal, sends out the instruction, the pneumatic cut-off valve 11 opens, immediately starts to supply oxygen, reaches the oxygen using equipment 13 through the throttle valve 12, and the VPSA oxygen production check valve 16 can prevent the liquid oxygen station oxygen from flowing back to the VPSA oxygen production system.

[0025] In the utility model, when the VPSA oxygen production equipment 14 normally operates, all valves between the pneumatic cut-off valve 11 and the low temperature liquid storage tank 1 in the liquid oxygen system still keep open state, when the VPSA oxygen production equipment 14 fails to stop, the control system directly opens the cut-off valve to supply oxygen, realizes seamless connection, the design is simple to operate, does not need to maintain, realizes 0s response switching of equipment, and realizes complete automation, does not need to arrange the operator to specially keep watch, saves manpower cost;Meanwhile, the oxygen using equipment 13 can effectively guarantee that oxygen is not interrupted, improves the stability of gas use, and increases the benefit.

[0026] The above disclosed is only a preferred embodiment of the utility model, and of course cannot limit the right range of the utility model, and the person skilled in the art can understand that all or part of the processes of the above-mentioned embodiment are realized, and equivalent changes made according to the utility model claim still belong to the range covered by the utility model.

Claims

1. An apparatus for on-line switching between a VPSA oxygen generation system and a liquid oxygen system, characterized in that, it comprises a VPSA oxygen generation check valve, a VPSA oxygen generation stop valve, a low-temperature liquid storage tank, a vaporizer, a VPSA oxygen generation device, a VPSA oxygen generation control center, and an oxygen-consuming device, a first control member is arranged between the low-temperature liquid storage tank and the vaporizer, a second control member is arranged between the vaporizer and the oxygen-consuming device, a pneumatic shut-off valve and a throttle valve are arranged between the second control member and the oxygen-consuming device, the VPSA oxygen generation control center is connected to the pneumatic shut-off valve, the VPSA oxygen generation check valve is connected to the VPSA oxygen generation device and located at the oxygen outlet end of the VPSA oxygen generation device, the VPSA oxygen generation stop valve is connected to the VPSA oxygen generation check valve and located at the outlet end of the VPSA oxygen generation check valve, and the VPSA oxygen generation stop valve is connected between the inlet end of the pneumatic shut-off valve and the inlet end of the throttle valve.

2. The apparatus for on-line switching between a VPSA oxygen generation system and a liquid oxygen system according to claim 1, characterized in that, the first control member comprises a first liquid oxygen discharge valve, a second liquid oxygen discharge valve, and a low-temperature long-handle stop valve.

3. The apparatus for on-line switching between a VPSA oxygen generation system and a liquid oxygen system according to claim 2, characterized in that, the first liquid oxygen discharge valve is connected to the liquid outlet end of the low-temperature liquid storage tank and the inlet end of the second liquid oxygen discharge valve, the second liquid oxygen discharge valve is connected to the outlet end of the first liquid oxygen discharge valve and the inlet end of the low-temperature long-handle stop valve, and the low-temperature long-handle stop valve is connected to the outlet end of the second liquid oxygen discharge valve and the inlet end of the vaporizer.

4. The apparatus for on-line switching between a VPSA oxygen generation system and a liquid oxygen system according to claim 3, characterized in that, the second control member comprises a low-temperature ball valve, an oxygen outlet filter, a first normal-temperature stop valve, a self-operated pressure regulating valve, and a second normal-temperature stop valve.

5. The apparatus for on-line switching between a VPSA oxygen generation system and a liquid oxygen system according to claim 4, characterized in that, the low-temperature ball valve is connected to the outlet end of the vaporizer and the inlet end of the oxygen outlet filter, the oxygen outlet filter is connected to the outlet end of the low-temperature ball valve and the inlet end of the first normal-temperature stop valve, the first normal-temperature stop valve is connected to the outlet end of the oxygen outlet filter and the inlet end of the self-operated pressure regulating valve, the self-operated pressure regulating valve is connected to the outlet end of the first normal-temperature stop valve and the inlet end of the second normal-temperature stop valve, and the second normal-temperature stop valve is connected to the inlet end of the self-operated pressure regulating valve and the inlet end of the pneumatic shut-off valve.

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