Carbon dioxide water washing system

Abstract

The utility model discloses a carbon dioxide water washing system, including a water washing tower and a circulation component, wherein the circulation component is used for circulating a dehydration medium in the water washing tower, the circulation component includes a plurality of circulation pumps, the plurality of the circulation pumps are arranged in parallel, a fourth connecting pipe is connected between the water washing tower and the circulation component, one end of the fourth connecting pipe is arranged at the upper end of the water washing tower, and is used for spraying the dehydration medium from the upper end to the lower end of the water washing tower, a cooling component is arranged on the fourth connecting pipe, and the cooling component is used for heat exchange of the fourth connecting pipe, the carbon dioxide water washing system includes a carbon dioxide supply system, and the carbon dioxide supply system includes a carbon dioxide tail gas delivery pipe. Compared with the prior art, the carbon dioxide water washing system of the utility model can minimize the situation where the carbon dioxide dehydration efficiency is affected by damage to the circulation pump, and can reduce the energy consumption generated by cooling the dehydration medium by arranging the cooling component, thereby reducing the cost of cooling the dehydration medium.

Description

Technical Field

[0001] The utility model belongs to the technical field of carbon dioxide dehydration, and in particular relates to a carbon dioxide water washing system. Background Art

[0002] Carbon dioxide raw gas contains various impurities, such as water, light hydrocarbons, methanol, sulfur, etc. The water content is much higher than other impurities. When liquid carbon dioxide can be used as a desiccant and made into dry ice, the water content in the product cannot exceed the standard, and the process needs to be strictly controlled. Therefore, the optimization and development of carbon dioxide dehydration process is crucial.

[0003] Existing carbon dioxide dehydration processes include pressure swing adsorption dehydration devices, water scrubber low-temperature dehydration and other methods. Among them, when using a water scrubber for low-temperature desorption, the medium in the water scrubber needs to be circulated to ensure that the medium temperature in the water scrubber is around 7 to 10 degrees Celsius above zero. In the process of lowering the temperature of the medium in the water scrubber, a large amount of energy consumption will be generated, which increases the cost of dehydrating carbon dioxide. In addition, the existing water scrubber low-temperature dehydration method generally uses a single circulation component. When the circulation pump is damaged, it will directly cause the water scrubber low-temperature dehydration link to fail to operate normally, thereby reducing the carbon dioxide dehydration efficiency.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0005] The utility model aims to provide a carbon dioxide water washing system, which can reduce the situation where the carbon dioxide dehydration efficiency is affected by the damage of the circulation pump, reduce the energy consumption generated by cooling the dehydration medium, and reduce the cost of cooling the dehydration medium.

[0006] In order to achieve the above purpose, the technical solution provided by a specific embodiment of the utility model is as follows:

[0007] A carbon dioxide water washing system comprises a water washing tower and a circulation component, wherein the circulation component is used for circulating a dehydration medium in the water washing tower, the circulation component comprises a plurality of circulation pumps, and the plurality of circulation pumps are arranged in parallel, a fourth connecting pipe is connected between the water washing tower and the circulation component, one end of the fourth connecting pipe is arranged at the upper end of the water washing tower, and is used for spraying the dehydration medium from the upper end to the lower end of the water washing tower, and a cooling component is arranged on the fourth connecting pipe, and the cooling component is used for heat exchange of the fourth connecting pipe.

[0008] In one or more embodiments of the present invention, the carbon dioxide water washing system includes a carbon dioxide supply system, the carbon dioxide supply system includes a carbon dioxide exhaust gas delivery pipe, one end of the carbon dioxide exhaust gas delivery pipe is connected to the dry ice workshop, a buffer tank is arranged on the carbon dioxide exhaust gas delivery pipe, a first delivery pipe is arranged between the buffer tank and the water washing tower, and a fan is arranged on the first delivery pipe.

[0009] In one or more embodiments of the present invention, a fifth connecting pipe is provided at the upper end of the water washing tower, and one end of the fifth connecting pipe away from the water washing tower is connected to a compressor.

[0010] In one or more embodiments of the present invention, the cooling assembly includes a cooling gas output pipe and a water scrubber cooler, the cooling gas output pipe is used to transport liquid ammonia into the water scrubber cooler, the water scrubber cooler is provided with a sixth connecting pipe and a seventh connecting pipe, one end of the sixth connecting pipe is connected to the ammonia removal tail gas equipment, and one end of the seventh connecting pipe is connected to the ammonia buffer tank.

[0011] In one or more embodiments of the utility model, the multiple circulating pumps include a first circulating pump and a second circulating pump, and the circulating assembly also includes a first connecting pipe and a fourth connecting pipe, the first connecting pipe is arranged at the lower end of the water washing tower for outputting the dehydration medium, the fourth connecting pipe is arranged at the upper end of the water washing tower for spraying the dehydration medium from the upper end to the lower end of the water washing tower, the second connecting pipe and the third connecting pipe are connected between the first connecting pipe and the fourth connecting pipe, the second connecting pipe and the third connecting pipe are communicated, the second connecting pipe is arranged through the second circulating pump, and the third connecting pipe is arranged through the first circulating pump.

[0012] In one or more embodiments of the present invention, the carbon dioxide water washing system further comprises a mounting frame for mounting the first circulation pump and the second circulation pump, and a third label box for inserting an identification card is provided on the mounting frame.

[0013] In one or more embodiments of the present invention, the first circulation pump and the second circulation pump are both installed with an input tube and an output tube, and the mounting frame is installed with a second label box and a first label box matching the input tube and the output tube.

[0014] In one or more embodiments of the utility model, a plurality of placement surfaces are provided on the mounting frame, the first circulation pump and the second circulation pump are placed on the placement surfaces, a plurality of L-shaped clips are provided on the placement surfaces, the lower ends of the first circulation pump and the second circulation pump are fixedly connected to a base plate, and the L-shaped clips match the base plate.

[0015] In one or more embodiments of the utility model, a through hole is provided on the L-shaped clip, a connecting shaft is provided in the through hole, a snap-in is rotatably connected to the connecting shaft, a snap-in groove matching the snap-in is provided on the bottom plate, and the snap-in groove and the snap-in are snap-connected.

[0016] Compared with the prior art, the carbon dioxide water washing system of the utility model can avoid the situation where the carbon dioxide dehydration efficiency is affected by damage to the circulation pump as much as possible, and by providing a cooling component, it can reduce the energy consumption generated by cooling the dehydration medium and reduce the cost of cooling the dehydration medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 Draw a diagram of the process of the carbon dioxide water washing system in one embodiment of the utility model;

[0019] Figure 2 This is a partial flow chart of a carbon dioxide water washing system in one embodiment of the utility model;

[0020] Figure 3 This is a partial structural diagram of a carbon dioxide water washing system in one embodiment of the utility model;

[0021] Figure 4 A partial cross-section of the structure of the carbon dioxide water washing system in one embodiment of the utility model Figure 1 ;

[0022] Figure 5 for Figure 4 Schematic diagram of the structure at A in the middle;

[0023] Figure 6 A partial cross-section of the structure of the carbon dioxide water washing system in one embodiment of the utility model Figure 2 ;

[0024] Figure 7 for Figure 6 Schematic diagram of the structure at point B in the middle.

[0025] Description of main reference numerals:

[0026] 1. Carbon dioxide tail gas delivery pipe; 2. Buffer tank; 3. First delivery pipe; 4. Fan; 5. Water scrubber; 501. Fifth connecting pipe; 6. Soft water delivery pipe; 7. Circulation component; 701. First connecting pipe; 702. Second connecting pipe; 703. Third connecting pipe; 704. Fourth connecting pipe; 8. First circulation pump; 9. Second circulation pump; 901. Bottom plate; 9011. Snap-in groove; 10. Drain pipe; 11. Cooling component; 1101. Cooling gas output pipe; 1102. Water scrubber cooler; 1103. Sixth connecting pipe; 1104. Seventh connecting pipe; 12. Mounting frame; 1201. Through hole; 13. Input pipe; 14. Output pipe; 15. First label box; 16. Second label box; 17. Third label box; 18. Connecting shaft; 19. Snap-in piece. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0028] like Figure 1-2 As shown, the carbon dioxide water washing system in one embodiment of the utility model includes a water washing tower 5 and a circulation component 7. The medium in the water washing tower 5 is carbon dioxide and softened water. After the softened water is cooled, it is sprayed from the upper end of the water washing tower 5 to the lower end of the water washing tower 5 in a spraying manner, so that the softened water and carbon dioxide are heat exchanged to achieve low-temperature dehydration of carbon dioxide. The softened water after heat exchange is circulated to the upper end of the water washing tower 5 through the circulation component 7 for spraying, and is cooled during the circulation to ensure that the temperature of the softened water is the process temperature for carbon dioxide dehydration.

[0029] The circulation component 7 includes a plurality of circulation pumps, which are arranged in parallel. The circulation pumps arranged in parallel can ensure that if one group of circulation pumps is damaged, the other circulation pumps can continue to operate without affecting the normal operation of the carbon dioxide water washing system.

[0030] Specifically, the circulation assembly 7 includes a first connecting pipe 701 and a fourth connecting pipe 704, and a plurality of groups of circulation pumps are arranged between the first connecting pipe 701 and the fourth connecting pipe 704, and the plurality of groups of circulation pumps are connected in parallel. Through the plurality of groups of circulation pumps connected in parallel, when one or more groups of circulation pumps are damaged, the undamaged circulation group pumps can continue to circulate the softened water, thereby ensuring the normal operation of the carbon dioxide water washing system.

[0031] Furthermore, the circulation pump includes a first circulation pump 8 and a second circulation pump 9, and the first connecting pipe 701 includes a second connecting pipe 702 and a third connecting pipe 703, the second connecting pipe 702 runs through the second circulation pump 9, and the third connecting pipe 703 runs through the first circulation pump 8. The second connecting pipe 702 and the third connecting pipe 703 are connected, that is, the third connecting pipe 703 and the second connecting pipe 702 are in parallel, and one end of the third connecting pipe 703 and the second connecting pipe 702 are connected to the fourth connecting pipe 704. That is, the first connecting pipe 701, the second connecting pipe 702, the first circulation pump 8 and the fourth connecting pipe 704 form a first passage, and the first connecting pipe 701, the third connecting pipe 703, the first circulation pump 8 and the fourth connecting pipe 704 form a second passage, and the first passage and the second passage can be used simultaneously or separately. That is, if the second passage cannot complete the circulation operation normally, the circulation operation can be continued through the first passage, and vice versa. Thereby ensuring that the carbon dioxide water washing system is not easily shut down due to damage to the circulation pump during use. That is, if the first passage is damaged, the first passage can be repaired, and during the repair process, the second passage can be used for circulation without affecting the normal use of the carbon dioxide water washing system.

[0032] Specifically, the first connecting pipe 701 is arranged at the lower end of the water washing tower 5, and the fourth connecting pipe 704 is arranged at the upper end of the water washing tower 5. The first connecting pipe 701 is used to extract the dehydration medium, and the fourth connecting pipe 704 is used to output the dehydration medium. The fourth connecting pipe 704 is provided with a cooling component 11, and the cooling component 11 is used to cool the cooling medium flowing in the fourth connecting pipe 704. During the circulation process, the dehydration medium exchanges heat with the cooling component 11 to reduce the temperature of the dehydration medium. By exchanging heat with the cooling component 11, the temperature of the dehydration medium in the fourth connecting pipe 704 is reduced, thereby reducing the cost required for cooling the dehydration medium.

[0033] The carbon dioxide water washing system provides carbon dioxide through a carbon dioxide supply system, which includes a carbon dioxide tail gas delivery pipe 1. One end of the carbon dioxide tail gas delivery pipe 1 is connected to a dry ice workshop. The tail gas of the dry ice is discharged through the carbon dioxide tail gas delivery pipe 1 and delivered to a buffer tank 2, which can buffer the carbon dioxide gas. Carbon dioxide enters the first delivery pipe 3 through the buffer tank 2. A fan 4 is provided on the first delivery pipe 3. The fan 4 is used to provide power for the delivery of carbon dioxide to ensure that carbon dioxide can enter the water washing tower 5. The carbon dioxide entering the water washing tower 5 is subjected to a carbon dioxide dehydration process in cooperation with the dehydration medium of the circulation component 7 and the cooling component 11.

[0034] Among them, Figure 1-2As shown, the cooling assembly 11 includes a cooling gas output pipe 1101 and a water scrubber cooler 1102, and the cooling gas output pipe 1101 is used to transport liquid ammonia into the water scrubber cooler 1102. The liquid ammonia is located inside the water scrubber cooler 1102 and exchanges heat with the fourth connecting pipe 704. A dehydrating medium flows in the fourth connecting pipe 704, that is, the liquid ammonia exchanges heat with the dehydrating medium in the water scrubber cooler 1102 to reduce the temperature of the dehydrating medium so that the temperature of the dehydrating medium reaches the process standard. The dehydrating medium is then sprayed into the water scrubber 5 through the fourth connecting pipe 704 to dehydrate the carbon dioxide.

[0035] The water scrubber cooler 1102 is provided with a sixth connecting pipe 1103 and a seventh connecting pipe 1104. One end of the sixth connecting pipe 1103 is connected to the ammonia tail gas removal equipment, and one end of the seventh connecting pipe 1104 is connected to the ammonia buffer tank.

[0036] like Figure 1-2 As shown, the fourth connecting pipe 704 is also connected to a sewage pipe 10 , and one end of the sewage pipe 10 away from the fourth connecting pipe 704 is connected to a sewage treatment device, that is, the dehydrated medium can be discharged from the sewage pipe 10 after being used for a period of time.

[0037] like Figure 1-2 As shown, the upper end of the water washing tower 5 is also connected to a fifth connecting pipe 501, and the end of the fifth connecting pipe 501 away from the water washing tower 5 is connected to a compressor. The dehydrated carbon dioxide is compressed by the compressor and then enters the next process step.

[0038] When the carbon dioxide water washing system is in use, first, carbon dioxide is provided to the water washing tower 5 through the carbon dioxide supply system, and the dehydration medium, that is, softened water, is initially transported to the water washing tower 5 through the soft water delivery pipe 6. The softened water generally comes from the RO system. The dehydration medium is pumped into the second circulation pump 9 through the circulation component 7 for circulation. In the process of conveying liquid ammonia by the cooling component 11, the fourth connecting pipe 704 exchanges heat with the water washing tower cooler 1102 to achieve heat exchange between the dehydration medium and the liquid ammonia and reduce the temperature of the dehydration medium. The fourth connecting pipe 704 then sprays the dehydration medium cooled to the process temperature from the upper end of the water washing tower 5 downward, and circulates the above steps through the circulation component 7 to achieve the effect of cooling and dehydrating the carbon dioxide.

[0039] When the second circulating pump 9 is damaged, the first circulating pump 8 can compensate for the second circulating pump 9, and the second circulating pump 9 can be directly repaired, and the circulation assembly 7 circulates through the first circulating pump 8. The second circulating pump 9 can be disassembled and replaced without stopping the machine.

[0040] Since there are several circulation pumps on the circulation component 7, and the several circulation pumps are generally installed in the same position, when one or more of the circulation pumps are damaged, it is not convenient to determine which process step the current circulation pump is in or the function of the current circulation pump. Especially for newcomers who are not familiar with the current circulation component 7, it is necessary to find the source of the other end of the circulation pump along the direction of the circulation pump connecting pipe to determine the function of each circulation pump, which affects the efficiency of disassembling or repairing the circulation pump.

[0041] In order to better solve the problem of inconvenience in determining the purpose of the circulation pump, multiple circulation pumps are placed on the mounting frame 12, and the mounting frame 12 is provided with a second label box 16 and a first label box 15 matching the input pipe 13 and the output pipe 14 of the circulation pump. The input pipe 13 corresponds to the second label box 16, and the output pipe 14 corresponds to the first label box 15. The functions of the second label box 16 and the first label box 15 are connected to the third label box 17. It is used to plug in the identification card, so that the maintenance personnel can clearly identify the function of the first label box 15 or the second label box 16 as soon as they see the card. It reduces the time wasted by the maintenance personnel to find the source of the circulation pump and improves the maintenance efficiency.

[0042] like Figure 4 As shown, by installing several circulation pumps on the mounting frame 12, setting a third label box 17 matching the circulation pump on the mounting frame 12, and inserting a card for identification in the third label box 17. Even a novice can clearly understand the function of the current circulation pump, the upper end of the connection, the lower end of the connection, and other information when seeing the label, so as to facilitate the disassembly and maintenance of the circulation pump.

[0043] like Figure 5 to Figure 7 As shown, the mounting frame 12 is provided with a plurality of placement surfaces, on which the first circulating pump 8 and the second circulating pump 9 are placed. The placement surface is provided with a plurality of L-shaped clips, and the lower ends of the first circulating pump 8 and the second circulating pump 9 are fixedly connected to a bottom plate 901, and the L-shaped clips match the bottom plate 901.

[0044] That is, two L-shaped clips form a slideway, and the bottom plate 901 is slidably connected in the slideway. The L-shaped clip is provided with a through hole 1201, and a connecting shaft 18 is provided in the through hole 1201. A clamping member 19 is rotatably connected to the connecting shaft 18. A clamping groove 9011 matching the clamping member 19 is provided on the bottom plate 901, and the clamping groove 9011 and the clamping member 19 are clamped.

[0045] One end of the clamping member 19 is V-shaped. When one end of the clamping member 19 enters the clamping groove 9011, the clamping member 19 is pulled outward, and the bottom plate 901 is clamped, so that the bottom plate 901 cannot slide out of the slideway, thereby fixing the second circulating pump 9. When the second circulating pump 9 needs to be taken out, the clamping member 19 is directly rotated so that one end of the clamping member 19 is located in the clamping groove 9011, and then the clamping member 19 is pulled out of the slideway.

[0046] The utility model realizes the circulation of the dehydration medium through the circulation component 7, realizes the recycling of the dehydration medium, and at the same time performs heat exchange with the dehydration medium through the cooling component 11, so that the dehydration medium can reach the process temperature, reduce the energy consumption generated by cooling the dehydration medium, and reduce the cost of dehydrating carbon dioxide through the water washing tower 5. By setting the third label box 17, the second label box 16, and the first label box 15 on the mounting frame 12, it is convenient to confirm the current circulation pump and clarify the purpose of the current circulation pump, including the on or off state. It is avoided as much as possible that maintenance personnel need to check the source and origin of the circulation pump when repairing the circulation pump.

[0047] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0048] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Carbon dioxide water washing system, characterized in that: It includes a water washing tower and a circulation component, wherein the circulation component is used to circulate the dehydration medium in the water washing tower, and the circulation component includes a plurality of circulation pumps, and the plurality of circulation pumps are arranged in parallel; A fourth connecting pipe is connected between the water washing tower and the circulation assembly, one end of the fourth connecting pipe is arranged at the upper end of the water washing tower, and is used to spray the dehydration medium from the upper end to the lower end of the water washing tower; The fourth connecting pipe is provided with a cooling assembly, and the cooling assembly is used for heat exchange of the fourth connecting pipe.

2. The carbon dioxide water washing system according to claim 1, characterized in that: The carbon dioxide water washing system includes a carbon dioxide supply system, and the carbon dioxide supply system includes a carbon dioxide exhaust gas delivery pipe, one end of the carbon dioxide exhaust gas delivery pipe is connected to the dry ice workshop, a buffer tank is arranged on the carbon dioxide exhaust gas delivery pipe, a first delivery pipe is arranged between the buffer tank and the water washing tower, and a fan is arranged on the first delivery pipe.

3. The carbon dioxide water washing system according to claim 1, characterized in that: A fifth connecting pipe is disposed at the upper end of the water washing tower, and one end of the fifth connecting pipe away from the water washing tower is connected to a compressor.

4. The carbon dioxide water washing system according to claim 1, characterized in that: The cooling assembly includes a cooling gas output pipe and a water scrubber cooler, the cooling gas output pipe is used to transport liquid ammonia to the water scrubber cooler, the water scrubber cooler is provided with a sixth connecting pipe and a seventh connecting pipe, one end of the sixth connecting pipe is connected to the ammonia tail gas removal equipment, and one end of the seventh connecting pipe is connected to the ammonia buffer tank.

5. The carbon dioxide water washing system according to claim 1, characterized in that: The multiple circulation pumps include a first circulation pump and a second circulation pump, and the circulation component also includes a first connecting pipe and a fourth connecting pipe. The first connecting pipe is arranged at the lower end of the water washing tower for outputting the dehydration medium, and the fourth connecting pipe is arranged at the upper end of the water washing tower for spraying the dehydration medium from the upper end to the lower end of the water washing tower. The second connecting pipe and the third connecting pipe are connected between the first connecting pipe and the fourth connecting pipe. The second connecting pipe and the third connecting pipe are communicated. The second connecting pipe is arranged through the second circulation pump, and the third connecting pipe is arranged through the first circulation pump.

6. The carbon dioxide water washing system according to claim 5, characterized in that: The carbon dioxide water washing system further comprises a mounting frame for mounting the first circulation pump and the second circulation pump, and a third label box for inserting an identification card is arranged on the mounting frame.

7. The carbon dioxide water washing system according to claim 6, characterized in that: The first circulation pump and the second circulation pump are both installed with an input tube and an output tube, and the mounting frame is installed with a second label box and a first label box matching the input tube and the output tube.

8. The carbon dioxide water washing system according to claim 6, characterized in that: The mounting frame is provided with a plurality of placement surfaces, the first circulation pump and the second circulation pump are placed on the placement surfaces, a plurality of L-shaped clips are provided on the placement surfaces, the lower ends of the first circulation pump and the second circulation pump are fixedly connected to a bottom plate, and the L-shaped clips match the bottom plate.

9. The carbon dioxide water washing system according to claim 8, characterized in that: The L-shaped clamping strip is provided with a through hole, a connecting shaft is arranged in the through hole, a clamping piece is rotatably connected to the connecting shaft, a clamping groove matching the clamping piece is provided on the bottom plate, and the clamping groove and the clamping piece are clamped.

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