High-purity oxygen replacement device

Abstract

The utility model discloses a high-purity oxygen replacement device which comprises a storage tank, a lower liquid pipe and an upper gas pipe of the storage tank are combined through a lower liquid root valve, a lower liquid valve, an upper gas root valve and an upper gas valve respectively and then connected with an upper root blow-off valve and a lower root blow-off valve, and a small-size vaporizer is connected between the lower liquid root valve and the upper gas root valve in parallel. The liquid inlet end of the small-size vaporizer is connected with a pressurization inlet valve, and the gas outlet end of the small-size vaporizer is sequentially connected with a pressure reducing valve and a pressurization outlet valve. The upper root blowing valve and the lower root blowing valve are connected with a newly-added pipeline, the newly-added pipeline is connected with a large-volume vaporizer, the large-volume vaporizer is connected with a newly-added valve in parallel, and a newly-added inlet valve and a newly-added outlet valve are arranged at the two ends of the large-volume vaporizer respectively. The high-purity oxygen replacement device can solve the problems that an existing high-purity oxygen replacement device consumes much liquid, is long in replacement time and replacement frequency, poor in replacement effect and high in labor intensity, and liquid consumption cannot be accurately controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of gas production equipment, in particular to a replacement device for high-purity oxygen. Background Art

[0002] With my country's rapid economic development, domestic demand for high-purity oxygen has been increasing year by year, particularly in industries such as metallurgy, chemical engineering, national defense, and healthcare. The demand is substantial and growing year by year. Existing high-purity oxygen containers are mostly standard oxygen, nitrogen, and argon containers. Currently, few companies have high-purity oxygen production capacity, and therefore most lack the ability to replace these containers. Even those that do have the capacity to do so quickly and efficiently.

[0003] There are two main replacement methods available: one is to pump high-purity liquid oxygen into a tank truck and replace the tank truck by self-pressurization of the tank truck; the other is to use the tank's own vaporizer to vaporize the liquid oxygen and then use the gas in the tank to send it into the tank truck for purging and replacement. The replacement device includes a storage tank, a lower liquid pipe and an upper gas pipe of the storage tank respectively connected to the lower liquid root valve, the lower liquid valve and the upper gas root valve, and the upper gas valve are combined and then connected to the upper and lower root purge valves. A small-volume vaporizer is connected in parallel between the lower liquid root valve and the upper gas root valve. The liquid inlet end of the small-volume vaporizer is connected to a pressurization inlet valve, and the gas outlet end of the small-volume vaporizer is connected to a pressure reducing valve and a pressurization outlet valve in sequence. ; The vent pipe of the storage tank is connected to the vent safety valve, the vent root valve and the vent solenoid valve in sequence and then emptied; the liquid inlet pipe of the storage tank is connected to the liquid inlet root valve, the liquid inlet safety valve, the liquid inlet manual valve and the liquid inlet solenoid valve in sequence to connect to the liquid oxygen inlet equipment, and a liquid inlet blow-off valve is provided between the liquid oxygen inlet equipment and the liquid inlet solenoid valve; the liquid outlet pipe at the bottom of the storage tank is connected to a one-way check valve and a breakaway valve, and two branches are provided between the one-way check valve and the breakaway valve, which are respectively connected to the safety valve and the blow-off valve, the liquid outlet pipe of the storage tank is connected to the lower liquid root valve and the boost inlet valve of the lower liquid pipe, and then merged with the liquid outlet pipe of the storage tank to connect to the analysis pipeline; the fullness measuring port above the storage tank is connected to a fullness measuring valve.

[0004] These two methods do not require modification of existing equipment and can be used directly. They do not have many requirements for the type of tank truck, but their disadvantages are also very obvious. The main problems are excessive liquid consumption, long replacement time, and too many replacements with poor results. Since the storage tank needs to be pressurized multiple times, it has a great impact on production. It is impossible to accurately grasp the consumption of replacement liquid, which leads to increased production costs and a great impact on the production efficiency of the high-purity oxygen device. When the high-purity oxygen storage tank is full, the atmospheric space is too small and the amount of gas after pressurization is small. Therefore, this replacement operation and equipment device were redesigned and modified to produce a high-efficiency and energy-saving high-purity oxygen tank truck device and operation. Utility Model Content

[0005] The problem to be solved by the utility model is to provide a high-purity oxygen replacement device to solve the problems of existing high-purity oxygen replacement devices such as high liquid consumption, long replacement time, frequent replacements, poor replacement effect, and inability to accurately control liquid consumption.

[0006] In order to solve the above problems, the technical solution of the present invention is: the high-purity oxygen replacement device includes a storage tank, the lower liquid pipe and the upper gas pipe of the storage tank are respectively connected to the upper and lower root blow-off valves after being merged through the lower liquid root valve, the lower liquid valve and the upper gas root valve, and the upper gas valve; a small-volume vaporizer is connected in parallel between the lower liquid root valve and the upper gas root valve; the liquid inlet end of the small-volume vaporizer is connected to the boost inlet valve, and the gas outlet end of the small-volume vaporizer is connected to the pressure reducing valve and the boost outlet valve in sequence; the upper and lower root blow-off valves are connected to a newly added pipeline, and the newly added pipeline is connected to a large-volume vaporizer, and the large-volume vaporizer is connected in parallel with a newly added valve, and the two ends of the large-volume vaporizer are respectively provided with a newly added inlet valve and a newly added outlet valve.

[0007] In the above technical solution, a more specific solution may be: a new pressure gauge is provided between the large-volume vaporizer and the new outlet valve.

[0008] Furthermore: a new safety valve is provided between the new pressure gauge and the new outlet valve.

[0009] Furthermore: a newly added blow-off valve is connected between the newly added inlet valve and the large-volume vaporizer via a blow-off pipe.

[0010] Furthermore: all valves, the newly added pressure gauge, the large-volume vaporizer, and the small-volume vaporizer are connected to a liquid level control unit.

[0011] Furthermore: the liquid level control unit is a distributed control system.

[0012] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0013] The high-purity oxygen replacement device adopts a large-volume vaporizer to be connected with the high-purity oxygen storage tank, and utilizes the characteristic of large-volume vaporizer with large vaporization capacity to replace the original small-volume vaporizer to participate in the replacement. The original small-volume vaporizer vaporizes the liquid and pressurizes the storage tank 1 once to replace the high-purity oxygen tank truck, thereby reducing the consumption of liquid, shortening the replacement time, reducing the number of replacements, and significantly improving the replacement effect. Moreover, by utilizing the vaporizer with large vaporization capacity, there is no need to pressurize the storage tank multiple times, and there is no need to consider the factors that the atmospheric space is small when the high-purity oxygen storage tank is full, and the gas volume is small and multiple pressurizations are required, thereby greatly reducing the impact on production and labor intensity, and the replacement liquid consumption can be accurately grasped.

[0014] The use of this high-purity oxygen replacement device solves the problems of excessive replacement times in high-purity oxygen tank trucks, multiple pressurization of storage tanks, high liquid consumption, excessive replacement times and time, and reduced workload. It achieves a significant reduction in liquid consumption for replacement in high-purity oxygen tank trucks, a significant reduction in replacement time, and a significant improvement in replacement efficiency and quality. The consumption of replacement liquid is reduced from 2 cubic meters to 0.4 cubic meters, and the replacement time is reduced from 36 hours to 8 hours. It solves the problem of high-purity oxygen devices requiring long-term shutdowns resulting in waste of raw gas, and achieves flexible regulation of high-purity oxygen device production, reducing the high-purity oxygen shutdown time from 36 hours to 8 hours. This high-purity oxygen replacement device is easy to install, stable, safe, and reliable, and simple to maintain, making it suitable for long-term and widespread use by enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0016] Markings in the figure: storage tank 1, upper air pipe 2, upper air root valve 3, booster outlet valve 4, upper air valve 5, pressure reducing valve 6, upper and lower root blow-off valves 7, lower liquid valve 8, small volume vaporizer 9, booster inlet valve 10, lower liquid root valve 11, lower liquid pipe 12, newly added pipeline 13, newly added valve 14, newly added inlet valve 15, newly added blow-off valve 16, large volume vaporizer 17, newly added pressure gauge 18, newly added safety valve 19, newly added outlet valve 20, vent safety valve 21, vent root valve 22, vent solenoid valve 23, liquid inlet root valve 31, liquid inlet safety valve 32, liquid inlet manual valve 33, liquid inlet solenoid valve 34, liquid inlet blow-off valve 35, liquid outlet pipe 40, one-way check valve 41, safety valve 42, blow-off valve 43, break valve 44, analysis pipeline 50, fullness measuring valve 51. DETAILED DESCRIPTION

[0017] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0018] like Figure 1The high-purity oxygen replacement device shown in the figure includes a storage tank 1, a lower liquid pipe 12 and an upper gas pipe 2 of the storage tank 1 are respectively connected to the upper and lower root blow-off valves 7 after being merged through the lower liquid root valve 11, the lower liquid valve 8 and the upper gas root valve 3, and the upper gas valve 5. A small volume vaporizer 9 is connected in parallel between the lower liquid root valve 11 and the upper gas root valve 2. The liquid inlet end of the small volume vaporizer 9 is connected to the boost inlet valve 10, and the gas outlet end of the small volume vaporizer 9 is connected to the pressure reducing valve 6 and the boost outlet valve 4 in sequence; the upper and lower root blow-off valves 7 are connected to the new Add a pipeline 13, the newly added pipeline 13 is connected to a large-volume vaporizer 17, the large-volume vaporizer 17 is connected in parallel with a newly added valve 14, a newly added inlet valve 15 and a newly added outlet valve 20 are respectively provided at both ends of the large-volume vaporizer 17, a newly added pressure gauge 18 is provided between the large-volume vaporizer 17 and the newly added outlet valve 20, a newly added safety valve 19 is provided between the newly added pressure gauge 18 and the newly added outlet valve 20, and a newly added blow-off valve 16 is connected between the newly added inlet valve 15 and the large-volume vaporizer 17 through a blow-off pipe. By connecting a large-volume vaporizer to the high-purity oxygen storage tank, the large-volume vaporizer with its larger vaporization capacity replaces the original small-volume vaporizer to participate in the replacement. The original small-volume vaporizer vaporizes the liquid and pressurizes the storage tank 1 once to perform the replacement operation on the high-purity oxygen tank truck, which reduces liquid consumption, shortens replacement time, reduces replacement times, and significantly improves the replacement effect. In addition, by utilizing the vaporizer with large vaporization capacity, there is no need to pressurize the storage tank multiple times, and there is no need to consider the factors that the atmospheric space is small and the gas volume is small when the high-purity oxygen storage tank is full, which greatly reduces the impact on production and labor intensity, solves the problems of high liquid consumption, long replacement time, many replacement times, poor replacement effect, and inability to accurately control liquid consumption, and can accurately grasp the replacement liquid consumption.

[0019] The vent pipe of the storage tank is connected to the vent safety valve 21, the vent root valve 22 and the vent solenoid valve 23 in sequence and then emptied; the liquid inlet pipe of the storage tank is connected to the liquid inlet root valve 31, the liquid inlet safety valve 32, the liquid inlet manual valve 33 and the liquid inlet solenoid valve 34 in sequence to connect to the liquid oxygen inlet equipment, and a liquid inlet blow-off valve 35 is provided between the liquid oxygen inlet equipment and the liquid inlet solenoid valve; the liquid outlet pipe at the bottom of the storage tank is connected to a one-way check valve 41 and a break valve 44, and two branches are provided between the one-way check valve 41 and the break valve 44, which are respectively connected to the safety valve 42 and the blow-off valve 43; the liquid outlet pipe 40 of the storage tank 1 is connected to the lower liquid root valve 11 and the boost inlet valve 10 of the lower liquid pipe 12, and then merged with the liquid outlet pipe 40 of the storage tank to connect to the analysis pipeline 50; the fullness measuring port above the storage tank is connected to the fullness measuring valve 51.

[0020] All valves, newly added pressure gauges 18, other existing pressure gauges, large-volume vaporizers 17, and small-volume vaporizers 9 are connected to a liquid level control unit, which is a distributed control system, i.e., DCS. The liquid level control line is laid out to the high-purity oxygen device DCS, and the control level, pressure alarm, etc. are set on the DCS.

[0021] This high-purity oxygen replacement device uses a large-volume vaporizer to connect to a high-purity oxygen storage tank. Pressure measuring points and corresponding valves are respectively provided on the pipeline connecting the large-volume vaporizer. A liquid level indicator and a pressure indicator can be installed on the storage tank. All liquid level and pressure signals are transmitted to the existing high-purity oxygen device DCS for remote monitoring. When the storage tank pressure reaches the set pressure, the DCS automatically alarms and opens the newly added inlet and outlet valves of the large-volume vaporizer. The small-volume vaporizer is used to vaporize the liquid to purge the tank truck. When the liquid level drops to the preset level, an automatic alarm is triggered and the newly added inlet and outlet valves are closed. In this way, the vaporization capacity of the large-volume vaporizer is utilized to solve the problems of excessive liquid consumption, long replacement time, and excessive replacement times with poor results in high-purity oxygen tank truck replacement. At the same time, there is no need to repeatedly pressurize the storage tank, and there is no need to consider the small atmospheric space and the small gas volume when the high-purity oxygen storage tank is full, which greatly reduces the impact on production and labor intensity. The problems of excessive liquid consumption, long replacement time, frequent replacement times, poor replacement results, and the inability to accurately control liquid consumption are solved, and replacement liquid consumption can be accurately controlled.

[0022] The use of this high-purity oxygen replacement device solves the problem of excessive replacement times in high-purity oxygen tank trucks and reduces the workload of personnel. It achieves a significant reduction in the consumption of replacement liquid in high-purity oxygen tank trucks, a significant reduction in replacement time, and a significant improvement in replacement efficiency and quality. The consumption of replacement liquid is reduced from 2 cubic meters to 0.4 cubic meters, and the replacement time is reduced from 36 hours to 8 hours. It solves the problem of high-purity oxygen devices requiring long-term shutdowns, resulting in waste of raw gas, and achieves flexible regulation of high-purity oxygen device production, reducing the high-purity oxygen shutdown time from 36 hours to 8 hours. This high-purity oxygen replacement device is easy to install, stable, safe, reliable, and simple to maintain, making it suitable for long-term and widespread use by enterprises.

Claims

1. A high-purity oxygen replacement device, comprising a storage tank, wherein a lower liquid pipe and an upper gas pipe of the storage tank are connected to upper and lower root purge valves respectively through a lower liquid root valve, a lower liquid valve and an upper gas root valve, and an upper gas valve. A small-volume vaporizer is connected in parallel between the lower liquid root valve and the upper gas root valve. The liquid inlet end of the small-volume vaporizer is connected to a boost inlet valve, and the gas outlet end of the small-volume vaporizer is connected in sequence to a pressure reducing valve and a boost outlet valve; characterized in that: The upper and lower root blow-off valves are connected to newly added pipelines, the newly added pipelines are connected to a large-volume vaporizer, the large-volume vaporizer is connected in parallel with a newly added valve, and the two ends of the large-volume vaporizer are respectively provided with a newly added inlet valve and a newly added outlet valve.

2. The high-purity oxygen replacement device according to claim 1, characterized in that: A new pressure gauge is provided between the large-volume vaporizer and the new outlet valve.

3. The high-purity oxygen replacement device according to claim 2, characterized in that: A new safety valve is provided between the new pressure gauge and the new outlet valve.

4. The high-purity oxygen replacement device according to claim 3, characterized in that: A newly added blow-off valve is connected between the newly added inlet valve and the large-volume vaporizer via a blow-off pipe.

5. The high-purity oxygen replacement device according to claim 4, characterized in that: All valves, the newly added pressure gauge, the large-volume vaporizer, and the small-volume vaporizer are connected to a liquid level control unit.

6. The high-purity oxygen replacement device according to claim 5, characterized in that: The liquid level control unit is a distributed control system.

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