Regeneration device of flash steam branching cold and hot blowing purification tower

Abstract

The utility model provides a flash steam branching cold and hot blowing purification tower regeneration device which comprises a storage assembly, a heating assembly, a filler assembly and a liquefaction assembly. The storage assembly comprises a carbon dioxide storage liquid inlet channel, a flash tank, a storage outflow channel and a pressure relief assembly installed on the storage outflow channel, the heating assembly is communicated with the storage outflow channel; the filler assembly comprises a purification tower as well as a carbon dioxide inflow channel, a carbon dioxide outflow channel, a non-condensable gas inlet channel and a non-condensable gas outflow channel which are respectively communicated with the purification tower, the carbon dioxide inflow channel is communicated with a carbon dioxide gas source, and the non-condensable gas inlet channel is communicated with the heating assembly; the liquefaction assembly is communicated with the carbon dioxide outflow channel and the carbon dioxide storage liquid inlet channel. The heated non-condensable gas can perform hot-blowing desorption regeneration on the purification tower, the unheated non-condensable gas cold-blows the purification tower for cooling, and the non-condensable gas is used for replacing shielding gas for regeneration, so that the production cost is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of carbon dioxide production, and in particular to a flash gas split hot and cold blowing purification tower regeneration device. Background Art

[0002] The tail gas from coal-to-hydrogen production is rich in a large amount of carbon dioxide gas, and also contains some impurities, such as methane (about 1.5%) and other non-condensable gases. During the carbon dioxide production process, the carbon dioxide raw gas undergoes cooling, water separation, compression, desulfurization, purification, filtration, liquefaction, storage and regeneration purification towers in sequence.

[0003] During the regeneration of the purification tower, a certain flow of low-pressure and high-temperature protective gas is introduced into the purification tower to regenerate the purification tower. The protective gas is back-blown from top to bottom to the purification tower, so that the adsorbent in the purification tower is affected by temperature and pressure to desorb impurities. In the storage process, there is non-condensable gas in the liquid carbon dioxide product entering the storage tank, and the non-condensable gas will evaporate into the gas phase of the storage tank. The main component of the non-condensable gas gas phase of the carbon dioxide storage tank is carbon dioxide, and the impurity component is methane. With the continuous production, there is too much non-condensable gas in the storage tank, and the pressure of the storage tank will continue to rise, and the gas phase of the storage tank needs to be discharged. Therefore, the non-condensable gas can be discharged and processed, and then the non-condensable gas can be passed into the purification tower to contact with the adsorbent to regenerate the adsorbent, so that the non-condensable gas can be fully utilized and the use of protective gas can be reduced.

[0004] For example, the comparative document CN202222257823.5 discloses a non-condensable gas energy recovery system at the top of a carbon dioxide distillation tower, in which the raw gas enters the distillation tower through an air inlet pipe; the gas phase separated from the top of the distillation tower enters the condensation pipe, and enters the reflux device after being cooled by a refrigeration device; after being cooled by the refrigeration device, the liquid phase transformed from the gas phase flows back into the distillation tower through the reflux pipe; the remaining unconverted gas phase enters the expansion power generation pipe, and enters the non-condensable gas pipe after passing through the expansion power generation device; the liquid phase separated from the bottom of the distillation tower enters the carbon dioxide pipe. This scheme utilizes the coordination of the distillation tower, the expansion power generation device and various parts to recycle the energy contained in the non-condensable gas at the top of the carbon dioxide distillation tower, generate electricity externally, and reduce the temperature of the non-condensable gas through the expansion effect of the expansion generator. However, the scheme is only used for the recovery of non-condensable gas heat, and the non-condensable gas is not used to regenerate the purification tower, and the use of protective gas cannot be reduced.

[0005] For example, the comparative document CN202320077323.5 discloses an adsorption regeneration system applied to carbon dioxide production, including a waste cooling recovery device 1, a waste cooling recovery device 2, a vortex tube, a three-way valve and a regeneration heater. The waste cooling recovery device 1 is connected to a raw gas pipeline 1 and an exhaust gas discharge pipe, the waste cooling recovery device 2 is connected to a non-condensable gas pipe 1, a pressure reducing valve is arranged on the non-condensable gas pipe 1, the waste cooling recovery device 2 is connected to the vortex tube through the non-condensable gas pipe 2, the cold flow end of the vortex tube is connected to the waste cooling recovery device 1 through the cold flow pipe, the hot flow pipe is connected to the hot flow pipe on the hot flow end of the vortex tube, a mixing pipe is connected to the three-way valve, the hot flow pipe and the exhaust gas discharge pipe are both connected to the mixing pipe, and the regeneration heater is connected to the three-way valve. The scheme uses a vortex tube to separate the energy of the non-condensable exhaust gas after the waste cooling is recovered, and simultaneously produces a cooling and heating effect. Through the cooling effect and heating effect of the vortex tube, the potential waste cooling is further recovered, and the power consumption of the regeneration heater is reduced. However, the solution is only used to recover the heat of non-condensable gas, and the non-condensable gas is not used to regenerate the purification tower, which cannot reduce the use of protective gas. Utility Model Content

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a flash gas split hot and cold blowing purification tower regeneration device which fully utilizes the non-condensable gas hot blowing regeneration purification tower and the cold blowing cooling purification tower.

[0007] The purpose of this disclosure is achieved through the following technical solutions:

[0008] A flash gas split hot and cold blowing purification tower regeneration device, comprising a storage component, a heating component, a filler component and a liquefaction component.

[0009] The storage assembly comprises a carbon dioxide storage inlet channel, a flash tank, a storage outflow channel and a pressure relief assembly, the carbon dioxide storage inlet channel is connected to the flash tank, the storage outflow channel is connected to the flash tank, and the pressure relief assembly is installed on the storage outflow channel;

[0010] The heating assembly comprises a heating air inlet channel, a heater and a heating air outlet channel, the two ends of the heating air inlet channel are respectively connected to the heater and the storage outflow channel, and one end of the heating air outlet channel is connected to the other end of the heater;

[0011] The packing assembly comprises a carbon dioxide inflow channel, a purification tower, a carbon dioxide outflow channel, a non-condensable gas inlet channel, a non-condensable gas outflow channel and a vent valve assembly, wherein the carbon dioxide inflow channel, the carbon dioxide outflow channel, the non-condensable gas inlet channel and the non-condensable gas outflow channel are all connected to the purification tower, the non-condensable gas inlet channel is connected to the heating gas outlet channel, the non-condensable gas outflow channel is connected to the vent valve assembly, the carbon dioxide inflow channel is connected to a carbon dioxide gas source, and the carbon dioxide outflow channel is connected to the gas inlet end of the liquefaction assembly;

[0012] The liquid outlet end of the liquefaction component is connected to the carbon dioxide storage liquid inlet channel;

[0013] The flash tank is used to store carbon dioxide and release non-condensable gas, the heater is used to heat the non-condensable gas, the liquefaction component is used to liquefy gaseous carbon dioxide, and the purification tower is used to absorb and filter impurities in the carbon dioxide.

[0014] In one embodiment, the pressure relief assembly includes a pressure regulating valve and a flow regulating valve, which are installed in the storage outflow channel in sequence. The pressure regulating valve is used to control the pressure of the non-condensable gas, and the flow regulating valve is used to control the flow stability.

[0015] In one of the embodiments, the pressure relief assembly further includes a safety valve, which is installed in the storage outflow channel and disposed between the heating air intake channel and the flow regulating valve.

[0016] In one embodiment, the flash gas branch hot and cold blowing purification tower regeneration device also includes a branch assembly, and the branch assembly also includes a branch flow pipe, a first branch branch pipe and a second branch branch pipe, one end of the branch flow pipe is connected to the storage outflow channel, the first branch branch pipe and the second branch branch pipe are both connected to the other end of the branch flow pipe, the other end of the first branch branch pipe is connected to the non-condensable gas inlet channel, and the other end of the second branch pipe is connected to the vent valve assembly.

[0017] In one embodiment, the branch assembly further includes a branch control valve, a first branch control valve, and a second branch control valve. The branch control valve is installed on the branch flow pipe, the first branch control valve is installed on the first branch pipe, and the second branch control valve is installed on the second branch pipe.

[0018] In one embodiment, the flash gas branch hot and cold blowing regeneration device also includes a filter assembly, which includes a first filter air inlet channel, a filter and a first filter air outlet channel connected in sequence, the first filter air inlet channel is connected to the carbon dioxide outflow channel, and the first filter air outlet channel is connected to the air inlet end of the liquefaction assembly.

[0019] In one embodiment, the filter assembly further includes a filter control valve, the number of the first filter air inlet channel, the filter, the first filter air outlet channel and the filter control valve is at least two, the filter control valve is installed in the corresponding first filter air inlet channel, one end of the two filters are respectively connected to the carbon dioxide outflow channel, and the other end of the two filters are respectively connected to the air inlet end of the liquefaction assembly.

[0020] In one embodiment, the vent valve assembly includes an exhaust pipe and an adjustable vent valve, the exhaust pipe is connected to the non-condensable gas outflow channel, and the adjustable vent valve is installed on the exhaust pipe.

[0021] In one embodiment, the packing assembly further includes a non-condensable gas inlet valve, a non-condensable gas outlet valve, a carbon dioxide inlet valve and a carbon dioxide outlet valve, the non-condensable gas inlet valve is installed in the non-condensable gas inlet channel, the non-condensable gas outlet valve is installed in the non-condensable gas outlet channel, the carbon dioxide inlet valve is installed in the carbon dioxide inflow channel, and the carbon dioxide outlet valve is installed in the carbon dioxide outflow channel.

[0022] In one embodiment, the number of the carbon dioxide inlet channel, the purification tower, the carbon dioxide outflow channel, the non-condensable gas inlet channel and the non-condensable gas outlet channel is at least two.

[0023] Compared with the prior art, the present invention has at least the following advantages:

[0024] 1. In the above-mentioned flash gas split cold and hot blowing purification tower regeneration device, the non-condensable gas flows into the heater to be heated, and the heated non-condensable gas flows into the purification tower. The high-temperature non-condensable gas purges the adsorbent in the purification tower, so that the adsorbent in the purification tower is desorbed by heat, and the adsorbent releases the adsorbed impurities, so that the non-condensable gas is fully utilized and the cost of purification tower regeneration is reduced;

[0025] 2. The non-condensable gas enters the storage outflow channel from the non-condensable gas outflow channel. The non-condensable gas is not heated when it flows into the heating coil of the heater. The low-temperature non-condensable gas flows into the purification tower for cold blowing, so that the purification tower is cooled down quickly, reducing the cost of cooling the purification tower, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a structural schematic diagram of a flash steam split cold and hot blowing purification tower regeneration device according to one embodiment;

[0028] Figure 2 for Figure 1 The schematic diagram of the partial structure of the flash steam split hot and cold blowing purification tower regeneration device shown;

[0029] Figure 3 for Figure 1Another partial structural schematic diagram of the flash steam split hot and cold blowing purification tower regeneration device is shown. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0034] like Figures 1 to 3 As shown, a flash gas split cold and hot blowing purification tower regeneration device 10 of an embodiment of the present disclosure includes a storage component 100, a heating component 200, a filler component 300 and a liquefaction component 400; the storage component 100 includes a carbon dioxide storage liquid inlet channel 110, a flash tank 120, a storage outflow channel 130 and a pressure relief component 140, the carbon dioxide storage liquid inlet channel 110 is connected to the flash tank 120, the storage outflow channel 130 is connected to the flash tank 120, and the pressure relief component 140 is installed in the storage outflow channel 130. The pressure of the non-condensable gas in the flash tank 120 is relatively high. When the non-condensable gas passes through the pressure relief component 140, the gas throttling expands, so that the volume increases and the pressure of the non-condensable gas decreases;

[0035] Furthermore, the heating assembly 200 includes a heating air inlet channel 210, a heater 220 and a heating air outlet channel 230 which are connected in sequence, the two ends of the heating air inlet channel 210 are respectively connected to the heater 220 and the storage outflow channel 130, and the heating air outlet channel 230 is connected to the other end of the heater 220; the packing assembly 300 includes a carbon dioxide inlet channel 310, a purification tower 320, a carbon dioxide outflow channel 330, a non-condensable gas inlet channel 340, a non-condensable gas outflow channel 350 and a vent valve assembly 360, the carbon dioxide inlet channel 310, the carbon dioxide outflow channel 330, the non-condensable gas inlet channel 340 and the non-condensable gas outflow channel 350 The outflow channels 350 are all connected to the purification tower 320, the non-condensable gas inlet channel 340 is connected to the heating outlet channel 230, the non-condenser outlet channel is connected to the vent valve assembly 360, the carbon dioxide inlet channel 310 is connected to the carbon dioxide gas source, the carbon dioxide outflow channel 330 is connected to the air inlet end of the liquefaction assembly 400; the liquid outlet end of the liquefaction assembly 400 is connected to the carbon dioxide storage inlet channel 110; the flash tank 120 is used to store carbon dioxide and release non-condensable gas, the heater 220 is used to heat non-condensable gas, the liquefaction assembly 400 is used to liquefy gaseous carbon dioxide, and the purification tower 320 is used to adsorb and filter moisture and impurities in carbon dioxide.

[0036] In this embodiment, the carbon dioxide raw gas enters the first circulation pipe from the flash tank 120 through the storage outflow channel 130 and then enters the heater 220. When the purification tower 320 is in the regeneration stage, the non-condensable gas is heated by the heater 220 and then enters the purification tower 320. The high-temperature non-condensable gas purges the adsorbent in the purification tower 320, so that the adsorbent in the purification tower 320 is regenerated by the non-condensable gas with a higher temperature. The adsorbent desorbs when heated, so that water and impurities are precipitated, and are then taken away from the purification tower 320 by the airflow of the non-condensable gas; when the purification tower 320 is regenerated by hot blowing, it is necessary to cool the purification tower 320. The non-condensable gas enters the purification tower 320 through the coil of the heater 220 without being heated, so that the non-condensable gas with a lower temperature flows into the purification tower 320, purges the inside of the purification tower 320, and reduces the temperature of the purification tower 320.

[0037] In the above-mentioned flash gas branch cold and hot blowing purification tower regeneration device 10, the non-condensable gas flows into the heater 220 to be heated, and the heated non-condensable gas flows into the purification tower 320, and the high-temperature non-condensable gas purges the adsorbent of the purification tower 320, so that the adsorbent of the purification tower 320 is desorbed by heat and the adsorbed impurities are released, so that the non-condensable gas is fully utilized and the regeneration cost of the purification tower 320 is reduced; the non-condensable gas enters the storage outflow channel 130 from the non-condensable gas outflow channel 350, and the non-condensable gas is not heated when it flows into the heating coil of the heater 220. The low-temperature non-condensable gas flows into the purification tower 320 for cold blowing, so that the purification tower 320 is quickly cooled down, reducing the cooling cost of the purification tower 320, thereby reducing the production cost.

[0038] like Figure 2 As shown, in one embodiment, the pressure relief assembly 140 includes a pressure regulating valve 141 and a flow regulating valve 142, which are sequentially installed in the storage outflow channel 130. The pressure regulating valve 141 is used to control the pressure of the non-condensable gas, and the flow regulating valve 142 is used to control the flow stability. In this embodiment, the pressure regulating valve 141 reduces the gas pressure of carbon dioxide flowing through the pressure regulating valve 141 by throttling expansion; due to the large pressure change, the flow of the non-condensable gas in the storage outflow channel 130 is unstable. When the non-condensable gas flows through the flow regulating valve 142, the size of the throttling port is changed by the flow regulating valve 142 to control the flow of the throttling port, so that the non-condensable gas can stably flow out of the storage outflow channel 130.

[0039] like Figure 3 As shown, in one embodiment, the pressure relief assembly 140 further includes a safety valve 143, which is installed in the storage outflow channel 130, and is disposed between the heating inlet channel 210 and the flow regulating valve 142. In this embodiment, when the pressure regulating valve 141 or the flow regulating valve 142 fails, when the flow rate and pressure of the non-condensable gas in the storage outflow channel 130 in the pipeline rise to exceed a specified value, the safety valve 140 discharges the pressure to the outside, so that the heater 220 and other equipment connected to the heating inlet channel 210 connected to the storage outflow channel 130 are protected.

[0040] like Figure 3 As shown, in one embodiment, the flash gas branch hot and cold blowing purification tower regeneration device 10 also includes a branch component 600, and the branch component 600 also includes a branch flow pipe 610, a first branch branch pipe 620 and a second branch branch pipe 630. One end of the branch flow pipe 610 is connected to the storage outflow channel 130, and the first branch branch pipe 620 and the second branch branch pipe 630 are both connected to the other end of the branch flow pipe 610. The other end of the first branch branch pipe 620 is connected to the non-condensable gas inlet channel 340, and the other end of the second branch branch pipe 630 is connected to the vent valve assembly 360. In this embodiment, the non-condensable gas can also enter the branch flow pipe 610, and the non-condensable gas can flow into the purification tower 320 along the first branch branch pipe 620 through the non-condensable gas inlet channel 340 for cold blowing and cooling. The non-condensable gas can also be discharged from the vent valve assembly 360 along the second branch branch pipe 630, reducing the non-condensable gas flow flowing into the heater 220, thereby alleviating the workload of the heater 220.

[0041] like Figure 2As shown, in one embodiment, the branch assembly 600 also includes a branch control valve 640, a first branch control valve 650, and a second branch control valve 660. The branch control valve 640 is installed on the branch flow pipe 610, the first branch control valve 650 is installed on the first branch branch pipe 620, and the second branch control valve 660 is installed on the second branch branch pipe 630. In this embodiment, the branch component 600 can circulate non-condensable gas, and the branch component 600 can divert the non-condensable gas in the storage outflow channel 130. The non-condensable gas diverted from the branch component 600 can flow into the first branch branch 620, and the non-condensable gas diverted through the first branch control valve 650 can enter the purification tower 320 through the non-condensable gas inlet channel 340; the non-condensable gas diverted from the branch component 600 can flow into the second branch branch 630, and the second branch control valve 660 can control the diverted non-condensable gas to flow from the second branch branch 630 into the vent valve component 360.

[0042] like Figure 2 As shown, in one embodiment, the flash gas split hot and cold blowing regeneration device 10 further includes a filter assembly 500, and the filter assembly 500 includes a first filter inlet channel 510, a filter 520, and a first filter outlet channel 530 which are connected in sequence, the first filter inlet channel 510 is connected to the carbon dioxide outflow channel 330, and the first filter outlet channel 530 is connected to the air inlet end of the liquefaction assembly 400. In this embodiment, when the carbon dioxide raw gas flows through the filter 500, the filter 500 can filter impurities in the carbon dioxide raw gas, so that the purity of carbon dioxide in the carbon dioxide raw gas is higher, and the carbon dioxide liquefied in the liquefaction assembly 400 has a higher purity.

[0043] like Figure 2As shown, in one embodiment, the filter assembly 500 further includes a filter control valve 540, the number of the first filter air inlet channel 510, the filter 520, the first filter air outlet channel 530 and the filter control valve 540 is at least two, and the filter control valve 540 is installed in the corresponding first filter air inlet channel 510, one end of the two filters 520 is respectively connected to the carbon dioxide outflow channel 330, and the other end of the two filters 520 is respectively connected to the air inlet end of the liquefaction assembly 400. The flash gas split hot and cold blowing purification tower regeneration device 10 also includes a filter 500, one end of the filter 500 is connected to the carbon dioxide outflow channel 330, and the other end of the filter 500 is connected to the liquefaction assembly 400. In this embodiment, when the amount of carbon dioxide raw gas flowing out of the carbon dioxide outflow channel 330 is large, the filtering effect of the filter 600 on the carbon dioxide raw gas is reduced, and the number of the first filter air inlet channel 510, the filter 520, the first filter air outlet channel 530 and the filter control valve 540 is increased, so that carbon dioxide flows through the channel of the filter 500, thereby reducing the flow rate of the carbon dioxide raw gas through each filter 600, thereby making the filter 600 have a better filtering effect on the carbon dioxide raw gas.

[0044] like Figure 2 As shown, in one embodiment, the vent valve assembly 360 includes an exhaust pipe 361 and an adjustable vent valve 362. The exhaust pipe 361 is connected to the non-condensable gas outflow channel 350, and the adjustable vent valve 362 is installed on the exhaust pipe 361. In this embodiment, the exhaust pipe 361 needs to be opened when there is pressure in the pipe to discharge the gas. The adjustable vent valve 362 can observe the flow change in the exhaust pipe 361 in real time and control the non-condensable gas to be discharged from the exhaust pipe 361.

[0045] like Figure 3 As shown, in one embodiment, the heating assembly 200 further includes a temperature measuring device, the heater 220 is provided with a temperature measuring port, the sensing end of the temperature measuring device is installed at the temperature measuring port, and the control end of the temperature measuring device is connected to the heater 220. In this embodiment, the high-temperature non-condensable gas enters the purification tower 320 through the non-condensable gas inlet pipe, and the high-temperature non-condensable gas contacts the adsorbent of the purification tower 320, so that the adsorbent of the purification tower 320 desorbs and releases impurities, the sensing end of the temperature measuring device detects the temperature of the non-condensable gas at the temperature measuring port, and the temperature measuring device outputs an electrical signal to control the heater 220 to heat the non-condensable gas, so that the temperature of the non-condensable gas is maintained within a certain range, so that the non-condensable gas at a suitable temperature has a better effect on desorbing impurities from the adsorbent of the purification tower.

[0046] like Figure 3As shown, in one embodiment, the packing assembly 300 also includes a non-condensable gas inlet valve 370a, a non-condensable gas outlet valve 370b, a carbon dioxide inlet valve 370c and a carbon dioxide outlet valve 370d, the non-condensable gas inlet valve 370a is installed in the non-condensable gas inlet channel 340, the non-condensable gas outlet valve 370b is installed in the non-condensable gas outlet channel 350, the carbon dioxide inlet valve 370c is installed in the carbon dioxide inlet channel 310, and the carbon dioxide outlet valve 370d is installed in the carbon dioxide outflow channel 330. In this embodiment, when the adsorbent of the purification tower 320 needs to desorb impurities for regeneration, the carbon dioxide inlet valve 370c and the carbon dioxide outlet valve 370d are closed to stop the carbon dioxide raw gas from flowing into the purification tower 320, and the non-condensable gas inlet valve 370a and the non-condensable gas outlet valve 370b are opened to control the non-condensable gas to flow evenly into the purification tower 320, so that the non-condensable gas maintains a suitable flow rate and pressure to desorb impurities with the adsorbent in the purification tower 320, so that the process of desorbing impurities by the adsorbent is efficient and the amount of non-condensable gas consumed is small; when the purification tower 320 needs to be cooled down, the non-condensable gas inlet valve 370a and the non-condensable gas outlet valve 370b control the flow rate of the non-condensable gas flowing in, so that a large amount of non-condensable gas quickly enters the purification tower 320, thereby quickly cooling down the purification tower 320.

[0047] In one embodiment, the packing assembly 300 also includes a gas analyzer that can analyze and detect the gas content of the carbon dioxide outflow channel 330. When the water content of the carbon dioxide raw gas passing through the gas analyzer is relatively high, it can be used to determine that the adsorbent in the purification tower 320 adsorbs too much water, and the adsorbent in the purification tower 320 has a reduced adsorption effect on carbon dioxide, and the purification tower 320 needs to be desorbed and regenerated. When the gas analyzer 380 detects that the water content of the carbon dioxide raw gas passing through is relatively low, it can be used to determine that the adsorbent in the purification tower 320 can adsorb carbon dioxide, and the purification tower 320 does not need to be desorbed and regenerated.

[0048] like Figure 1 As shown, in one embodiment, the number of the carbon dioxide inflow channel 310, the purification tower 320, the carbon dioxide outflow channel 330, the non-condensable gas inlet channel 340 and the non-condensable gas outlet channel 350 is at least two. In this embodiment, when one purification tower 320 of the packing assembly 300 performs hot blowing regeneration, the other purification tower 320 can perform hot blowing desorption and desorption on the carbon dioxide raw gas, thereby ensuring the continuous production of carbon dioxide, thereby improving the production efficiency of carbon dioxide.

[0049] Compared with the prior art, the present invention has at least the following advantages:

[0050] 1. In the above-mentioned flash gas split cold and hot blowing purification tower regeneration device 10, the non-condensable gas flows into the heater 220 to be heated, and the heated non-condensable gas flows into the purification tower 320. The high-temperature non-condensable gas purges the adsorbent of the purification tower 320, so that the adsorbent of the purification tower 320 is desorbed by heat and the adsorbed impurities are released, so that the non-condensable gas is fully utilized and the cost of regeneration of the purification tower 320 is reduced;

[0051] 2. The non-condensable gas enters the storage outflow channel 130 from the non-condensable gas outflow channel 350. The non-condensable gas is not heated when it flows into the heating coil of the heater 220. The low-temperature non-condensable gas flows into the purification tower 320 for cold blowing, so that the purification tower 320 is cooled down quickly, reducing the cost of cooling the purification tower 320, thereby reducing the production cost.

[0052] 3. Non-condensable gas replaces the protective gas to regenerate the adsorbent of the purification tower, which reduces the use of protective gas and reduces the production cost of carbon dioxide production.

[0053] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A flash gas split hot and cold blowing purification tower regeneration device, characterized in that: It includes storage components, heating components, filling components and liquefaction components. The storage assembly comprises a carbon dioxide storage inlet channel, a flash tank, a storage outflow channel and a pressure relief assembly, the carbon dioxide storage inlet channel is connected to the flash tank, the storage outflow channel is connected to the flash tank, and the pressure relief assembly is installed on the storage outflow channel; The heating assembly comprises a heating air inlet channel, a heater and a heating air outlet channel, the two ends of the heating air inlet channel are respectively connected to the heater and the storage outflow channel, and one end of the heating air outlet channel is connected to the other end of the heater; The packing assembly comprises a carbon dioxide inflow channel, a purification tower, a carbon dioxide outflow channel, a non-condensable gas inlet channel, a non-condensable gas outflow channel and a vent valve assembly, wherein the carbon dioxide inflow channel, the carbon dioxide outflow channel, the non-condensable gas inlet channel and the non-condensable gas outflow channel are all connected to the purification tower, the non-condensable gas inlet channel is connected to the heating gas outlet channel, the non-condensable gas outflow channel is connected to the vent valve assembly, the carbon dioxide inflow channel is connected to a carbon dioxide gas source, and the carbon dioxide outflow channel is connected to the gas inlet end of the liquefaction assembly; The liquid outlet end of the liquefaction component is connected to the carbon dioxide storage liquid inlet channel; The flash tank is used to store carbon dioxide and release non-condensable gas, the heater is used to heat the non-condensable gas, the liquefaction component is used to liquefy gaseous carbon dioxide, and the purification tower is used to absorb and filter impurities in the carbon dioxide.

2. The flash gas split cold and hot blowing purification tower regeneration device according to claim 1, characterized in that: The pressure relief assembly includes a pressure regulating valve and a flow regulating valve, which are sequentially installed in the storage outflow channel. The pressure regulating valve is used to control the pressure of the non-condensable gas, and the flow regulating valve is used to control the flow stability.

3. The flash gas split cold and hot blowing purification tower regeneration device according to claim 2, characterized in that: The pressure relief assembly further includes a safety valve, which is installed in the storage outflow passage and is disposed between the heating air intake passage and the flow regulating valve.

4. The flash gas split cold and hot blowing purification tower regeneration device according to claim 1, characterized in that: The flash gas branch hot and cold blowing purification tower regeneration device also includes a branch assembly, and the branch assembly also includes a branch flow pipe, a first branch branch pipe and a second branch branch pipe. One end of the branch flow pipe is connected to the storage outflow channel, and the first branch branch pipe and the second branch branch pipe are both connected to the other end of the branch flow pipe. The other end of the first branch branch pipe is connected to the non-condensable gas inlet channel, and the other end of the second branch pipe is connected to the vent valve assembly.

5. The flash gas split cold and hot blowing purification tower regeneration device according to claim 4, characterized in that: The branch assembly also includes a branch control valve, a first branch control valve, and a second branch control valve. The branch control valve is installed on the branch flow pipe, the first branch control valve is installed on the first branch pipe, and the second branch control valve is installed on the second branch pipe.

6. The flash gas split cold and hot blowing purification tower regeneration device according to claim 1, characterized in that: The flash gas shunt hot and cold blowing regeneration device also includes a filter assembly, which includes a first filter air inlet channel, a filter and a first filter air outlet channel connected in sequence, the first filter air inlet channel is connected to the carbon dioxide outflow channel, and the first filter air outlet channel is connected to the air inlet end of the liquefaction assembly.

7. The flash gas split cold and hot blowing purification tower regeneration device according to claim 6, characterized in that: The filter assembly also includes a filter control valve. The number of the first filter air inlet channel, the filter, the first filter air outlet channel and the filter control valve is at least two. The filter control valve is installed in the corresponding first filter air inlet channel. One end of the two filters is respectively connected to the carbon dioxide outflow channel, and the other end of the two filters is respectively connected to the air inlet end of the liquefied assembly.

8. The flash gas split cold and hot blowing purification tower regeneration device according to claim 1, characterized in that: The vent valve assembly includes an exhaust pipe and an adjustable vent valve. The exhaust pipe is connected to the non-condensable gas outflow channel, and the adjustable vent valve is installed on the exhaust pipe.

9. The flash gas split cold and hot blowing purification tower regeneration device according to claim 1, characterized in that: The filler assembly also includes a non-condensable gas inlet valve, a non-condensable gas outlet valve, a carbon dioxide inlet valve and a carbon dioxide outlet valve. The non-condensable gas inlet valve is installed in the non-condensable gas inlet channel, the non-condensable gas outlet valve is installed in the non-condensable gas outlet channel, the carbon dioxide inlet valve is installed in the carbon dioxide inflow channel, and the carbon dioxide outlet valve is installed in the carbon dioxide outflow channel.

10. The flash gas split cold and hot blowing purification tower regeneration device according to claim 1, characterized in that: The number of the carbon dioxide inflow channel, the purification tower, the carbon dioxide outflow channel, the non-condensable gas inlet channel and the non-condensable gas outlet channel is at least two.

Images