Waste gas recovery oxygen production equipment

Abstract

The invention relates to waste gas recovery oxygen production equipment, and relates to the technical field of oxygen production equipment, the waste gas recovery oxygen production equipment comprises a recovery mechanism arranged on the oxygen production equipment and used for recycling waste gas discharged by the oxygen production equipment, and the recovery mechanism communicates with a heatless regeneration dryer; the waste gas recovered by the recovery mechanism is used for assisting the heatless regeneration dryer to desorb the adsorbed moisture and realize the regeneration of the adsorbent. Waste gas exhausted by the oxygen generation equipment is collected through the recovery mechanism, then the collected waste gas is exhausted into the heatless regeneration dryer through the recovery mechanism, regeneration of an adsorbent in the heatless regeneration dryer is assisted through the waste gas, and the regeneration effect of the adsorbent in the heatless regeneration dryer is improved; and therefore, a good drying effect of the heatless regeneration dryer on the compressed air is ensured, and waste of waste gas is reduced.

Description

Technical Field

[0001] This application relates to the technical field of oxygen generation equipment, and in particular to an exhaust gas recovery oxygen generation equipment. Background Art

[0002] At present, oxygen generation equipment includes three aspects: industrial oxygen generation equipment, household oxygen generation equipment, and medical oxygen generation equipment. Medical oxygen generation equipment adopts the world's advanced PSA pressure swing adsorption air separation oxygen generation technology, which realizes the separation of oxygen and nitrogen based on the difference in the adsorption capacity of zeolite molecular sieve adsorbents for oxygen and nitrogen in the air. The PSA oxygen generation system mainly consists of an air compressor, an air cooler, an air buffer tank, a switching valve, an adsorber, and an oxygen balance tank.

[0003] Chinese Patent with publication number CN104192807B discloses an oxygen generation equipment system and its process flow. The oxygen generation equipment system includes an air compressor, a high-efficiency oil remover, a precision filter, a heatless regeneration dryer, a fine dust filter A, an activated carbon filter, a gas storage tank, an oxygen generation equipment, a fine dust filter B, and an oxygen storage tank connected in sequence. By adopting a heatless regeneration dryer, the moisture content in the compressed air is reduced.

[0004] When the adsorption tower reaches the maximum adsorption capacity, the switcher switches the inlets and outlets of the two adsorption towers, so that the two adsorption towers work alternately with each other to continuously generate oxygen. When the two adsorption towers work alternately with each other, the inside of the adsorption tower that reaches the maximum adsorption capacity is communicated with the outside, and then the exhaust gas adsorbed in the adsorption tower is discharged, which is convenient for subsequent absorption and oxygen generation of the exhaust gas in the compressed air again. The exhaust gas in this process is directly discharged into the atmosphere after being released, which causes waste of the exhaust gas. Summary of the Invention

[0005] In order to reduce the waste of exhaust gas, this application provides an exhaust gas recovery oxygen generation equipment.

[0006] An exhaust gas recovery oxygen generation equipment provided by this application adopts the following technical solutions: An exhaust gas recovery oxygen generation equipment includes a recovery mechanism arranged on the oxygen generation equipment and used for recovering and utilizing the exhaust gas discharged from the oxygen generation equipment. The recovery mechanism is communicated with a heatless regeneration dryer, and the exhaust gas recovered by the recovery mechanism is used to assist the heatless regeneration dryer in desorbing the adsorbed moisture and realizing the regeneration of the adsorbent.

[0007] By adopting the above technical solutions, the exhaust gas discharged from the oxygen generation equipment is collected by the recovery mechanism, and then the recovery mechanism discharges the collected exhaust gas into the heatless regeneration dryer. The exhaust gas assists in the regeneration of the adsorbent in the heatless regeneration dryer, improves the regeneration effect of the adsorbent in the heatless regeneration dryer, and further ensures the good drying effect of the heatless regeneration dryer on the compressed air, reducing the waste of exhaust gas.

[0008] Further, the recovery mechanism includes: A collection component that is connected to the oxygen generation device and is used to collect the waste gas discharged from the oxygen generation device; An exhaust component, with both ends of the exhaust component connected to the collection component and the heatless regeneration dryer respectively. The exhaust component is used to discharge the waste gas collected by the collection component into the heatless regeneration dryer and assist in the regeneration of the adsorbent in the heatless regeneration dryer.

[0009] By adopting the above technical solution, the collection component collects the waste gas discharged from the oxygen generation device, and then the exhaust component discharges the waste gas collected in the collection component into the heatless regeneration dryer. The waste gas blows the adsorbent in the heatless regeneration dryer, thereby realizing the regeneration of the adsorbent in the heatless regeneration dryer.

[0010] Further, the collection component includes: A buffer gas storage tank that is connected to the nitrogen discharge port of the oxygen generation device through a first pipe and is used to buffer and store the waste gas discharged from the oxygen generation device; An exhaust part that is connected to the oxygen generation device and is used to discharge the excess waste gas discharged from the oxygen generation device into the air.

[0011] By adopting the above technical solution, as the waste gas collected in the buffer gas storage tank gradually increases, the air pressure value in the buffer gas storage tank gradually increases. When the air pressure value in the buffer gas storage tank is equal to the air pressure at the nitrogen discharge port, the exhaust part continues to discharge the waste gas in the oxygen generation device into the air, thereby ensuring the regeneration effect of the zeolite molecular sieve in the oxygen generation device.

[0012] Further, the exhaust part includes: An exhaust pipe that is arranged on the first pipe and is internally connected to the first pipe. The end of the exhaust pipe away from the first pipe is connected to the air; A gas pressure gauge that is arranged on the buffer gas storage tank and is used to detect the air pressure difference between the inside of the buffer tank and the nitrogen discharge port; A control valve that is arranged on the first pipe and is electrically connected to the gas pressure gauge. The control valve switches the connection between the nitrogen discharge port and the buffer gas storage tank or the connection between the nitrogen discharge port and the exhaust pipe according to the measured value of the gas pressure gauge.

[0013] By adopting the above technical solution, when the value of the gas pressure gauge reaches the set value, the controller closes the connection between the buffer gas storage tank and the nitrogen discharge port, and at the same time makes the nitrogen discharge port communicate with the atmosphere through the exhaust pipe, so that the waste gas in the oxygen generation device continues to be discharged, ensuring the regeneration effect of the zeolite molecular sieve in the oxygen generation device.

[0014] Further, an auxiliary gas storage assembly for improving the gas storage effect of the waste gas is provided on the buffer gas storage tank. The auxiliary gas storage assembly includes: A storage tank, which is internally connected to the buffer gas storage tank through the second pipe; An exhaust pump, which is arranged on the second pipe and is used to discharge the waste gas in the buffer gas storage tank into the storage tank. The exhaust pump is used to reduce the air pressure value in the buffer gas storage tank; A first one-way valve, which is arranged on the second pipe and only allows the waste gas in the buffer gas storage tank to enter the storage tank.

[0015] By adopting the above technical solution, when the buffer gas storage tank is not connected to the nitrogen discharge port, the exhaust pump is started to pump the waste gas in the buffer gas storage tank into the storage tank. At the same time, the first one-way valve prevents the gas in the storage tank from flowing back into the buffer gas storage tank, thereby reducing the air pressure value in the buffer gas storage tank, facilitating the subsequent collection effect of the waste gas in the oxygen production equipment, and also increasing the air pressure value of the waste gas in the storage tank, facilitating the auxiliary effect on the subsequent heatless regeneration dryer.

[0016] Further, a protection assembly for protecting the storage tank is provided on the storage tank. The protection assembly includes: A pressure gauge, which is arranged on the storage tank and is used to detect the air pressure value in the storage tank. The pressure gauge is electrically connected to the exhaust pump; A pressure relief pipe, which is arranged on the storage tank and is used to relieve the pressure of the storage tank; A safety valve, which is arranged on the pressure relief pipe and is electrically connected to the pressure gauge. The safety valve is used to control the opening or closing of the pressure relief pipe.

[0017] By adopting the above technical solution, when the pressure gauge detects that the air pressure value in the storage tank reaches the set value, the safety valve opens the pressure relief pipe to discharge the excess gas in the storage tank, thereby ensuring the safety of the gas storage tank.

[0018] Further, the pressure relief pipe is arranged at the bottom of the storage tank and is used to discharge the condensed water or impurities in the storage tank. The pressure relief pipe is made of a transparent material and is convenient for observing the accumulation amount of condensed water or impurities in the pressure relief pipe.

[0019] By adopting the above technical solution, since the storage tank is used for storing waste gas for a long time, when the moisture or impurities in the waste gas accumulate at the bottom of the storage tank under the action of gravity, it is convenient to observe the accumulation amount of condensed water or impurities in the storage tank through the transparent pressure relief pipe. When the accumulation amount reaches a certain amount, the safety valve is manually controlled to open the pressure relief pipe to discharge the accumulated condensed water and impurities, thereby reducing the impurity content in the storage tank.

[0020] Further, the exhaust assembly includes: The third pipe, the third pipe is in internal communication with the storage tank; A dispenser, the dispenser is in communication with the third pipe and is used to discharge the waste gas in the storage tank into the corresponding drying tank of the heatless regeneration dryer. The dispenser passes the waste gas in the storage tank into the drying tank and assists in regenerating the adsorbent in the drying tank; A second check valve, the second check valve is arranged between the third pipe and the dispenser and is used to prevent the gas in the heatless regeneration dryer from entering the third pipe.

[0021] By adopting the above technical solution, the third pipe is used to discharge the waste gas in the storage tank, and then the waste gas is discharged into the drying tank where the adsorbent is being regenerated through the dispenser. The second check valve prevents the dried gas in the heatless regeneration dryer from entering the dispenser, and then through the blowing of the waste gas on the adsorbent, it assists in regenerating the adsorbent in the drying tank.

[0022] Furthermore, a cyclone gas-water separator for drying the waste gas passing through the third pipe is arranged on the third pipe, and the cyclone gas-water separator is used for gas-liquid separation of the waste gas passing through the third pipe.

[0023] By adopting the above technical solution, since the waste gas in the third pipe is mainly used to regenerate the adsorbent in the heatless regeneration dryer, the cyclone gas-water separator is used for gas-liquid separation of the waste gas in the third pipe, and then the separated moisture is discharged, thereby improving the regeneration effect of the waste gas on the adsorbent.

[0024] Furthermore, a heat exchanger for absorbing the heat generated during the oxygen production process is arranged on the oxygen production equipment. The other end of the heat exchanger is connected to the storage tank, and the heat exchanger is used to release the heat absorbed by the oxygen production equipment into the waste gas in the storage tank.

[0025] By adopting the above technical solution, the heat exchanger absorbs the heat generated during the oxygen production process of the oxygen production equipment, and then the heat exchanger transfers the absorbed heat to the waste gas in the storage tank, thereby increasing the temperature of the waste gas and improving the regeneration effect of the waste gas on the adsorbent in the heatless regeneration dryer.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The buffer gas storage tank is used to buffer and collect the waste gas discharged by the oxygen production equipment. At the same time, the gas pressure gauge and the control valve cooperate with each other to make the air at the nitrogen discharge port of the oxygen production equipment communicate. By making the pressure at the nitrogen discharge port equal to the atmospheric pressure, as much nitrogen adsorbed in the oxygen production equipment as possible is discharged. At the same time, the waste gas in the buffer gas storage tank is discharged into the heatless regeneration dryer through the dispenser, and the waste gas is used to assist in regenerating the adsorbent in the drying tank, improving the regeneration effect of the adsorbent in the heatless regeneration dryer, thereby ensuring the good drying effect of the heatless regeneration dryer on the compressed air and reducing the waste of waste gas.

[0027] 2. The exhaust gas in the buffer gas storage tank is discharged into the storage tank through an exhaust pump for temporary storage, and the air pressure value in the buffer gas storage tank is reduced, which is convenient for the subsequent waste gas recovery effect of the buffer gas storage tank on the oxygen production equipment. At the same time, the air pressure value of the exhaust gas is increased, and then the exhaust gas passing through the third pipe is dried by a cyclone gas-water separator, further reducing the moisture content in the exhaust gas, thereby improving the regeneration effect of the exhaust gas on the adsorbent in the heatless regeneration dryer.

[0028] 3. The heat generated during the oxygen production process of the oxygen production equipment is absorbed by a heat exchanger, and then the heat absorbed by the heat exchanger is transferred to the exhaust gas in the storage tank, thereby increasing the temperature of the exhaust gas and improving the regeneration effect of the exhaust gas on the adsorbent in the heatless regeneration dryer. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of the waste gas recovery oxygen production equipment according to Embodiment 1 of the present application; Figure 2 is a schematic structural diagram of the waste gas recovery oxygen production equipment according to Embodiment 2 of the present application; Figure 3 is Figure 2 an enlarged schematic view of part A in Figure 4 is a schematic structural diagram of the waste gas recovery oxygen production equipment according to Embodiment 3 of the present application.

[0030] Reference numerals: 1, oxygen production equipment system; 11, high-efficiency oil remover; 12, precision filter; 13, heatless regeneration dryer; 131, drying tank; 14, fine dust filter; 15, activated carbon filter; 16, buffer tank; 17, oxygen production equipment; 18, oxygen storage tank; 2, recovery mechanism; 3, collection assembly; 31, buffer gas storage tank; 32, first pipe; 33, exhaust member; 331, exhaust pipe; 332, gas pressure gauge; 333, control valve; 4, exhaust assembly; 41, third pipe; 42, distributor; 43, second one-way valve; 5, auxiliary gas storage assembly; 51, storage tank; 52, exhaust pump; 53, first one-way valve; 54, second pipe; 6, protection assembly; 61, pressure gauge; 62, pressure relief pipe; 63, safety valve; 7, cyclone gas-water separator; 8, heat exchanger. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following Figures 1-4 further describes the present application in detail with reference to the

[0032] The embodiments of the present application disclose a waste gas recovery oxygen production equipment.

[0033] Embodiment 1 Refer to Figure 1, an exhaust gas recovery oxygen generation device, including a recovery mechanism 2 provided on the oxygen generation device 17 and used for recycling the exhaust gas discharged from the oxygen generation device 17. The recovery mechanism 2 is communicated with the heatless regenerative dryer 13, and the exhaust gas recovered by the recovery mechanism 2 is used to assist the heatless regenerative dryer 13 in desorbing the adsorbed moisture and realizing the regeneration of the adsorbent.

[0034] Refer to Figure 1 , the oxygen generation device system 1 includes an air compressor, a high-efficiency oil remover 11, a precision filter 12, a heatless regenerative dryer 13, a dust fine filter 14, an activated carbon filter 15, a buffer tank 16, an oxygen generation device 17, a dust fine filter 14, and an oxygen storage tank 18. The air is compressed by the air compressor, and then the impurities in the compressed air are removed successively through the high-efficiency oil remover 11, the precision filter 12, the heatless regenerative dryer 13, the dust fine filter 14, and the activated carbon filter 15. Then, after being buffered by the buffer tank 16, it enters the oxygen generation device 17 for oxygen generation. After the oxygen generation is completed, the oxygen is processed successively through the dust fine filter 14 and the oxygen storage tank 18, and finally the preparation of oxygen is realized.

[0035] Refer to Figure 1 , where the oxygen generation device 17 in this embodiment is a PSA oxygen generation device 17, that is, under normal temperature and pressure conditions, the PSA special zeolite molecular sieve is used to selectively adsorb impurities such as nitrogen, carbon dioxide, and water in the air, so as to obtain oxygen with a higher purity; when the adsorber adsorbs to a certain extent, the adsorbent therein will reach a saturated state. At this time, the adsorbed nitrogen, moisture, carbon dioxide, and a small amount of other exhaust gas components are discharged through the switching valve, and the adsorbent is regenerated. The main component of the exhaust gas is nitrogen.

[0036] Refer to Figure 1 , the recovery mechanism 2 includes a collection component 3 and an exhaust component 4. The collection component 3 is communicated with the nitrogen discharge port of the oxygen generation device 17, and the collection component 3 is used to collect the exhaust gas discharged from the oxygen generation device 17; both ends of the exhaust component 4 are communicated with the collection component 3 and the heatless regenerative dryer 13 respectively. The exhaust component 4 is used to discharge the exhaust gas collected by the collection component 3 into the heatless regenerative dryer 13, and the adsorbent in the heatless regenerative dryer 13 is blown by the exhaust gas, thereby realizing the regeneration of the adsorbent in the heatless regenerative dryer 13.

[0037] Refer to Figure 1, the collection component 3 includes a buffer gas storage tank 31 and an exhaust component 33. The buffer gas storage tank 31 is connected to the nitrogen discharge port of the oxygen generation device 17 through a first pipe 32. The buffer gas storage tank 31 is used for buffering and storing the waste gas discharged by the oxygen generation device 17; the exhaust component 33 is connected to the oxygen generation device 17. The exhaust component 33 is used for discharging the excess waste gas discharged by the oxygen generation device 17 into the air. The exhaust component 33 includes an exhaust pipe 331, a gas pressure gauge 332 and a control valve 333. Among them, the exhaust pipe 331 is fixedly installed on the first pipe 32 and is internally connected to the first pipe 32. One end of the exhaust pipe 331 away from the first pipe 32 is connected to the outside air; the gas pressure gauge 332 is fixedly installed on the buffer gas storage tank 31. The gas pressure gauge 332 is used for detecting the air pressure difference between the inside of the buffer tank 16 and the nitrogen discharge port; the control valve 333 is fixedly installed on the first pipe 32. The control valve 333 is electrically connected to the gas pressure gauge 332. The control valve 333 switches the connection between the nitrogen discharge port and the buffer gas storage tank 31 or the connection between the nitrogen discharge port and the exhaust pipe 331 according to the measured value of the gas pressure gauge 332.

[0038] Refer to Figure 1 , specifically, when the oxygen generation device 17 starts to discharge nitrogen, the controller makes the nitrogen discharge port communicate with the inside of the buffer gas storage tank 31, and the nitrogen discharge port does not communicate with the inside of the exhaust pipe 331. Since the air pressure value at the nitrogen discharge port is greater than the air pressure value inside the buffer gas storage tank 31, the waste gas at the nitrogen discharge port enters the buffer gas storage tank 31. As the amount of stored waste gas in the buffer gas storage tank 31 gradually increases, the air pressure value inside the buffer gas storage tank 31 gradually increases. When the gas pressure gauge 332 detects that the air pressure difference between the nitrogen discharge port and the inside of the buffer gas storage tank 31 reaches the set value, the gas pressure gauge 332 drives the controller to close, and then the nitrogen discharge port communicates with the inside of the exhaust pipe 331, and the nitrogen discharge port does not communicate with the inside of the second buffer gas storage tank 31, so that the waste gas discharged from the oxygen generation device 17 enters the exhaust pipe 331 and is finally discharged into the air. By making the nitrogen discharge port equal to the atmospheric pressure, the adsorbed nitrogen in the oxygen generation device 17 is discharged as much as possible, and the zeolite molecular sieve in the oxygen generation device 17 is regenerated; then the gas in the buffer gas storage tank 31 is discharged into the heatless regeneration dryer 13 through the exhaust assembly 4 to assist in regenerating the adsorbent in the heatless regeneration dryer 13. At the same time, the air pressure value in the buffer gas storage tank 31 returns to the initial state, which is convenient for buffering and storing the waste gas discharged by the oxygen generation device 17 again.

[0039] Refer to Figure 1, the heatless regenerative dryer 13 includes two drying tanks 131 for drying compressed gas. Adsorbents for adsorbing moisture are fixedly installed in both drying tanks 131. The working states of the two drying tanks 131 are opposite. When one group of drying tanks 131 adsorbs moisture in the compressed air, the other group of drying tanks 131 is used to discharge the moisture in the adsorbent and realize the regeneration of the adsorbent. When the adsorbent is saturated with adsorption, the states of the two drying tanks 131 are switched, and finally continuous moisture adsorption drying of the compressed air is realized; in this embodiment, the waste gas is mainly nitrogen, and after being dried by the heatless regenerative dryer 13, the moisture content inside is small. Therefore, it has a good auxiliary effect on the regeneration of the adsorbent after adsorbing moisture in the drying tank 131.

[0040] Referring to Figure 1 , the exhaust assembly 4 includes a third pipe 41, a distributor 42 and a second one-way valve 43. The third pipe 41 is internally connected to the buffer gas storage tank 31. The distributor 42 is internally connected to the third pipe 41. The distributor 42 is used to discharge the waste gas in the buffer gas storage tank 31 into the drying tank 131 for regenerating the adsorbent, so as to realize the regeneration of the adsorbent in the auxiliary drying tank 131; the second one-way valve 43 is fixedly installed between the third pipe 41 and the distributor 42. The second one-way valve 43 is used to prevent the gas in the heatless regenerative dryer 13 from entering the third pipe 41; in this embodiment, one end of the third pipe 41 close to the heatless regenerative dryer 13 is interconnected with the tops of the two drying tanks 131 through two groups of branch roads. The distributor 42 is a valve fixedly installed on the two groups of branch roads and used to control the opening or closing of the two groups of branch roads, so as to control the gas in the buffer gas storage tank 31 to enter the designated drying tank 131. A group of second one-way valves 43 are provided on both groups of branch roads.

[0041] The working principle of Embodiment 1 of this application is as follows: The buffer gas storage tank 31 is used to buffer and collect the waste gas discharged from the oxygen generation device 17. At the same time, the gas pressure gauge 332 and the control valve 333 cooperate with each other to make the air at the nitrogen discharge port of the oxygen generation device 17 communicate. By making the pressure at the nitrogen discharge port equal to the atmospheric pressure, the adsorbed nitrogen in the oxygen generation device 17 is discharged as much as possible. At the same time, the waste gas in the buffer gas storage tank 31 is discharged into the heatless regenerative dryer 13 through the distributor 42. The regeneration of the adsorbent in the auxiliary drying tank 131 by the waste gas improves the regeneration effect of the adsorbent in the heatless regenerative dryer 13, and further ensures the good drying effect of the heatless regenerative dryer 13 on the compressed air, reduces the waste of waste gas and reduces the energy consumption of the oxygen generation device 17.

[0042] Embodiment 2 Referring to Figure 2 and Figure 3, the difference between this embodiment and Embodiment 1 is that an auxiliary gas storage assembly 5 for improving the gas storage effect of the waste gas is provided on the buffer gas storage tank 31. The auxiliary gas storage assembly 5 includes a storage tank 51, an exhaust pump 52, and a first one-way valve 53. The storage tank 51 is internally connected to the buffer gas storage tank 31 through a second pipe 54; the exhaust pump 52 is fixedly installed on the second pipe 54, and the exhaust pump 52 is used to discharge the waste gas in the buffer gas storage tank 31 into the storage tank 51. The exhaust pump 52 is used to reduce the air pressure value in the buffer gas storage tank 31; the first one-way valve 53 is fixedly installed on the second pipe 54, and the first one-way valve 53 is located between the storage tank 51 and the exhaust pump 52. The first one-way valve 53 only allows the waste gas in the buffer gas storage tank 31 to enter the storage tank 51.

[0043] Referring to Figure 2 and Figure 3 , specifically, when the control valve 333 closes the connection between the nitrogen discharge port and the buffer gas storage tank 31, the exhaust pump 52 starts, and then sucks the waste gas in the buffer gas storage tank 31 into the storage tank 51, thereby reducing the air pressure value in the buffer gas storage tank 31, which is convenient for subsequent absorption of the waste gas in the oxygen generation device 17; when the air pressure value in the buffer gas storage tank 31 reaches the set value, the exhaust pump 52 is closed, and the first one-way valve 53 is used to prevent the gas in the storage tank 51 from flowing back, and at the same time, it also reduces the damage of the gas in the storage tank 51 to the exhaust pump 52; when the working states of the two tanks of the oxygen generation device 17 are switched, the control valve 333 reconnects the nitrogen discharge port and the buffer gas storage tank 31. Since the air pressure value in the buffer gas storage tank 31 is relatively low, it is convenient to quickly suck the waste gas in the oxygen generation device 17 into the buffer gas storage tank 31.

[0044] Referring to Figure 2 and Figure 3 , the third pipe 41 is internally connected to the storage tank 51. By means of the exhaust pump 52, the air pressure value in the storage tank 51 is increased, and then it is convenient to quickly and highly pressurize the waste gas in the storage tank 51 and discharge it into the heatless regenerative dryer 13, improving the regeneration efficiency of the adsorbent in the heatless regenerative dryer 13; at the same time, due to the storage function of the exhaust pump 52 and the storage tank 51, the working state switching of the heatless regenerative dryer 13 and the oxygen generation device 17 does not need to be synchronized.

[0045] Referring to Figure 2 and Figure 3, a protection component 6 is provided on the storage tank 51. The protection component 6 is used to protect the storage tank 51, reducing the probability of damage to the storage tank 51 caused by excessive air pressure value. The protection component 6 includes a pressure gauge 61, a pressure relief pipe 62, and a safety valve 63. The pressure gauge 61 is fixedly installed on the storage tank 51 and is used to detect the air pressure value inside the storage tank 51. The pressure gauge 61 is electrically connected to the exhaust pump 52. When the pressure gauge 61 detects that the pressure value inside the storage tank 51 is too high, the exhaust pump 52 is turned off, reducing the probability of damage to the storage tank 51 due to excessive air pressure value.

[0046] Refer to Figure 2 and Figure 3 , the pressure relief pipe 62 is fixedly installed on the bottom of the storage tank 51. The pressure relief pipe 62 is used to relieve the pressure of the storage tank 51. The safety valve 63 is fixedly installed on the pressure relief pipe 62. The safety valve 63 is electrically connected to the pressure gauge 61. When the pressure gauge 61 detects that the air pressure value inside the storage tank 51 is too high, the safety valve 63 is opened, allowing the gas inside the storage tank 51 to be discharged from the pressure relief pipe 62, thereby reducing the air pressure value inside the storage tank 51.

[0047] Refer to Figure 2 and Figure 3 , the storage tank 51 stores the waste gas. Since the waste gas also contains moisture and other dust impurities, when the storage tank 51 stores the waste gas, the moisture in the waste gas condenses to form condensed water. The condensed water accumulates on the bottom of the storage tank 51 under the action of gravity. At the same time, the dust in the waste gas accumulates on the bottom of the storage tank 51 under the combined action of gravity and condensed water. Since the pressure relief pipe 62 is located on the bottom of the storage tank 51, the condensed water and dust preferentially accumulate in the pressure relief pipe 62. By making the pressure relief pipe 62 of a transparent material, it is convenient to observe the accumulation amount of condensed water or impurities in the pressure relief pipe 62. When the accumulation amount of condensed water or impurities in the pressure relief pipe 62 reaches a certain amount, the safety valve 63 is manually opened to discharge the condensed water and impurities accumulated at the bottom of the storage tank 51.

[0048] Refer to Figure 2 and Figure 3 , a cyclone air-water separator 7 for drying the waste gas passing through the third pipe 41 is fixedly installed on the third pipe 41. The cyclone air-water separator 7 is used to separate the air and water in the waste gas in the third pipe 41, and then discharge the separated water from the third pipe 41, thereby reducing the moisture content of the waste gas entering the heatless regenerative dryer 13 and improving the regeneration effect of the waste gas on the adsorbent in the heatless regenerative dryer 13.

[0049] The working principle of Embodiment 2 of this application is: The exhaust gas in the buffer gas storage tank 31 is discharged into the storage tank 51 through the exhaust pump 52 for temporary storage, and the air pressure value in the buffer gas storage tank 31 is reduced, which is convenient for the subsequent waste gas recovery effect of the buffer gas storage tank 31 on the oxygen generation equipment 17. At the same time, the air pressure value of the waste gas is increased, and then the waste gas passing through the third pipe 41 is dried by the cyclone gas-water separator 7, further reducing the moisture content in the waste gas, and thus improving the regeneration effect of the waste gas on the adsorbent in the heatless regeneration dryer 13.

[0050] Embodiment 3 Refer to Figure 4 , the difference between this embodiment and Embodiment 2 is that during the adsorption and separation of nitrogen and oxygen by the oxygen generation equipment 17 through zeolite molecular sieve, a certain amount of heat will be released when air is adsorbed in the molecular sieve. Especially when compressed air passes through the zeolite molecular sieve, heat will be released, and the heat generated during long-term use is likely to cause equipment failure.

[0051] Refer to Figure 4 , a heat exchanger 8 is fixedly installed on the oxygen generation equipment 17. The heat exchanger 8 is used to absorb the heat generated during the oxygen generation process of the oxygen generation equipment 17. The other end of the heat exchanger 8 is connected to the storage tank 51, and then the absorbed heat is discharged into the storage tank 51. The heat absorbed by the oxygen generation equipment 17 is released into the storage tank 51 through the heat exchanger 8, and the waste gas absorbs the heat, finally increasing the temperature value of the waste gas, and thus improving the regeneration effect of the waste gas on the adsorbent in the heatless regeneration dryer 13.

[0052] The working principle of Embodiment 3 of this application is as follows: The heat generated during the oxygen generation process of the oxygen generation equipment 17 is absorbed by the heat exchanger 8, and then the heat absorbed by the heat exchanger 8 is transferred to the waste gas in the storage tank 51, thereby increasing the temperature of the waste gas and improving the regeneration effect of the waste gas on the adsorbent in the heatless regeneration dryer 13.

[0053] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An oxygen production device for waste gas recovery, characterized in that: It includes a recovery mechanism (2) arranged on the oxygen generation device (17) and used for recycling the waste gas discharged from the oxygen generation device (17). The recovery mechanism (2) is communicated with the heatless regeneration dryer (13), and the waste gas recovered by the recovery mechanism (2) is used to assist the heatless regeneration dryer (13) in desorbing the adsorbed moisture and realizing the regeneration of the adsorbent.

2. An oxygen production device for waste gas recovery according to claim 1, characterized in that: The recovery mechanism (2) includes: A collection component (3) that is communicated with the oxygen generation device (17) and used for collecting the waste gas discharged from the oxygen generation device (17); An exhaust component (4) with both ends respectively communicated with the collection component (3) and the heatless regeneration dryer (13). The exhaust component (4) is used for discharging the waste gas collected by the collection component (3) into the heatless regeneration dryer (13) and assisting in the regeneration of the adsorbent in the heatless regeneration dryer (13).

3. The oxygen production device for waste gas recovery according to claim 2, characterized in that: The collection component (3) includes: A buffer gas storage tank (31) that is communicated with the nitrogen discharge port of the oxygen generation device (17) through a first pipe (32) and used for buffer storage of the waste gas discharged from the oxygen generation device (17); An exhaust part (33) that is communicated with the oxygen generation device (17) and used for discharging the excess waste gas discharged from the oxygen generation device (17) into the air.

4. An oxygen production device for waste gas recovery according to claim 3, characterized in that: The exhaust part (33) includes: An exhaust pipe (331) that is arranged on the first pipe (32) and internally communicated with the first pipe (32). The end of the exhaust pipe (331) far from the first pipe (32) is communicated with the air; A gas pressure gauge (332) that is arranged on the buffer gas storage tank (31) and used for detecting the air pressure difference between the inside of the buffer tank (16) and the nitrogen discharge port; A control valve (333) that is arranged on the first pipe (32) and electrically connected to the gas pressure gauge (332). The control valve (333) switches the communication between the nitrogen discharge port and the buffer gas storage tank (31) or the nitrogen discharge port and the exhaust pipe (331) according to the measured value of the gas pressure gauge (332).

5. An oxygen production device for waste gas recovery according to claim 3, characterized in that: An auxiliary gas storage component (5) for improving the gas storage effect is arranged on the buffer gas storage tank (31). The auxiliary gas storage component (5) includes: A storage tank (51) that is internally communicated with the buffer gas storage tank (31) through a second pipe (54); An exhaust pump (52) that is arranged on the second pipe (54) and used for discharging the waste gas in the buffer gas storage tank (31) into the storage tank (51). The exhaust pump (52) is used for reducing the air pressure value in the buffer gas storage tank (31); A first one-way valve (53) that is arranged on the second pipe (54) and only allows the waste gas in the buffer gas storage tank (31) to enter the storage tank (51).

6. An oxygen production device for waste gas recovery according to claim 5, characterized in that: A protection component (6) for protecting the storage tank (51) is arranged on the storage tank (51). The protection component (6) includes: A pressure gauge (61) is provided on the storage tank (51) and is used to detect the air pressure value inside the storage tank (51). The pressure gauge (61) is electrically connected to the exhaust pump (52). A pressure relief pipe (62) is provided on the storage tank (51) and is used to relieve the pressure of the storage tank (51). A safety valve (63) is provided on the pressure relief pipe (62) and is electrically connected to the pressure gauge (61). The safety valve (63) is used to control the opening or closing of the pressure relief pipe (62).

7. An oxygen production device for waste gas recovery according to claim 6, characterized in that: The pressure relief pipe (62) is provided at the bottom of the storage tank (51) and is used to discharge the condensed water or impurities inside the storage tank (51). The pressure relief pipe (62) is made of a transparent material to facilitate observing the accumulation amount of condensed water or impurities inside the pressure relief pipe (62).

8. The oxygen production equipment for waste gas recovery according to claim 2, wherein: The exhaust assembly (4) includes: A third pipe (41) that communicates with the interior of the storage tank (51). A distributor (42) that communicates with the third pipe (41) and is used to discharge the waste gas inside the storage tank (51) into the corresponding drying tank (131) of the heatless regeneration dryer (13). The distributor (42) passes the waste gas inside the storage tank (51) into the drying tank (131) and assists in regenerating the adsorbent inside the drying tank (131). A second one-way valve (43) is provided between the third pipe (41) and the distributor (42) and is used to prevent the gas inside the heatless regeneration dryer (13) from entering the third pipe (41).

9. An oxygen production device for waste gas recovery according to claim 8, characterized in that: A cyclone gas-water separator (7) for drying the waste gas passing through the third pipe (41) is provided on the third pipe (41). The cyclone gas-water separator (7) is used to separate the gas and water of the waste gas passing through the third pipe (41) and discharge the moisture.

10. An oxygen production device for waste gas recovery according to claim 5, characterized in that: A heat exchanger (8) for absorbing the heat generated during the oxygen production process is provided on the oxygen production device (17). The other end of the heat exchanger (8) is connected to the storage tank (51). The heat exchanger (8) is used to release the heat absorbed by the oxygen production device (17) into the waste gas inside the storage tank (51).

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