A production apparatus for enhancing carbon dioxide production and a method thereof

Abstract

The application discloses a production device and method for enhancing carbon dioxide production, belonging to the technical field of carbon dioxide preparation, which comprises a buffer tank, a compression device, a desulfurization device, a refining device, a liquefaction device, a purification device, a storage bottle, pipeline one, pipeline two, pipeline three, pipeline four, pipeline five, pipeline six, the buffer tank is connected with the compression device through the pipeline one, the desulfurization device is connected with the compression device through the pipeline two, the refining device is connected with the desulfurization device through the pipeline three, the liquefaction device is connected with the refining device through the pipeline four, the purification device is connected with the liquefaction device through the pipeline five, and the purification device is connected with the storage bottle through the pipeline six; the produced liquid carbon dioxide has a purity of 99.9%, and the production has high purity and high efficiency.

Claims

1. A production method for enhancing carbon dioxide production, characterized in that, The invention includes a production apparatus for enhancing carbon dioxide production, comprising a buffer tank (1), a compression device (2), a desulfurization device (3), a refining device (4), a liquefaction device (5), a purification device (6), a storage bottle (61), a pipeline 1 (7), a pipeline 2 (8), a pipeline 3 (9), a pipeline 4 (10), a pipeline 5 (11), and a pipeline 6 (12). The buffer tank (1) is connected to the compression device (2) via the pipeline 1 (7), the desulfurization device (3) is connected to the compression device (2) via the pipeline 2 (8), the refining device (4) is connected to the desulfurization device (3) via the pipeline 3 (9), the liquefaction device (5) is connected to the refining device (4) via the pipeline 4 (10), the purification device (6) is connected to the liquefaction device (5) via the pipeline 5 (11), and the purification device (6) is connected to the storage bottle (61) via the pipeline 6 (12). The desulfurization device (3) includes a gas-liquid separator (31) and a hydrolytic desulfurization tower (32). A medium-pressure steam interface (33) is provided above the gas-liquid separator (31). The medium-pressure steam interface (33) is connected to a medium-pressure steam pipeline. The left end of the gas-liquid separator (31) is connected to the second pipeline (8). A cooler (34) is provided inside the gas-liquid separator (31). A liquid outlet pipe (35) is provided below the right end of the cooler (34). An air outlet pipe (36) is provided above the right end of the gas-liquid separator (31). The air outlet pipe (36) is connected to the third pipeline (9). The liquid outlet pipe (35) is connected to the hydrolytic desulfurization tower (32). The buffer tank (1) includes an air inlet (13), a pipe (14), a tank body (15), a filter element (16), and a short rod (17). The air inlet (13) is located at the top of the tank body (15). The outer end of the air inlet (13) is connected to the external raw material gas through the pipe (14). The inner end of the air inlet is connected to the filter element (16). The outer side of the filter element (16) is fixedly connected to the inner wall of the tank body (15) through the short rod (17). The bottom of the tank body (15) is provided with a condensate collection box (18). The lower end of the condensate collection box (18) is provided with a drain valve (19) for draining condensate. Multiple electronic cooling chips (151) are fixedly connected to the inner wall of the tank body (15). The right side of the tank body (15) is provided with an air outlet (152). The outer end of the air outlet (152) is connected to the pipe (7). The compression device (2) includes compressor one (21), compressor two (22), buffer chamber (23), and compression housing (24). Compressor one (21) is fixedly connected to the left side inside the compression housing (24), compressor two (22) is fixedly connected to the right side inside the compression housing (24), and buffer chamber (23) is fixedly connected inside the compression housing (24) and located between compressor one (21) and compressor two (22). The air inlet of compressor one (21) is connected to pipe one (7), the air outlet of compressor one (21) is connected to the air inlet of buffer chamber (23), the air inlet of compressor two (22) is connected to the air outlet of buffer chamber (23), and the air outlet of compressor two (22) is connected to pipe two (8). Cooling water pipes (25) are wound around the outside of compressor one (21), buffer chamber (23), and compressor two (22), and the cooling water pipes (25) are connected to an external cooling water source. The hydrolysis desulfurization tower (32) includes a tower body (321), a stirrer (322), a hydrolysis desulfurizing agent addition chamber (323), a hydrogen sulfide recovery pipe (324), and a fixing rod (325). A reaction chamber (326) is located at the bottom of the tower body (321), and a separation liquid interface (327) is located on the upper left side of the reaction chamber (326). The separation liquid interface (327) is identical to the liquid outlet pipe (35). The hydrolysis desulfurizing agent addition chamber (323) is located on the right side of the tower body (321). The hydrolysis desulfurizing agent is added... The bottom of the chamber (323) is provided with an addition port (328), which passes through the inner wall of the tower body (321) and is located on the upper right side of the reaction chamber (326). The stirrer (322) is fixedly connected to the top of the reaction chamber (326) by the fixing rod (325). The top of the tower body (321) is provided with a hydrogen sulfide outlet (329), which is connected to the hydrogen sulfide recovery pipe (324). The bottom of the reaction chamber (326) is provided with a waste liquid outlet. The refining device (4) includes a desulfurization tower body (41), an air inlet (42), a desulfurizing agent layer (43), and a desulfurizing agent silo (44). The desulfurizing agent silo (44) is fixedly connected to the right side of the desulfurization tower body (41). The desulfurizing agent layer (43) has three layers, which are fixed inside the desulfurization tower body (41) from bottom to top. A desulfurizing agent pipe (45) is provided below the desulfurizing agent silo (44), and a desulfurizing agent pipe (45) is provided on the left side of the desulfurizing agent pipe (45). Three desulfurizing agent outlets (46) are connected to the desulfurizing agent layer (43). A waste outlet (47) is provided on the left side of the desulfurizing agent layer (43). An air outlet two (48) is provided at the top of the desulfurization tower body (41). An air inlet two (42) is provided at the bottom of the desulfurization tower body (41). The air inlet two (42) is connected to the pipe three (9). The air outlet two (48) is connected to the pipe four (10). The liquefaction device (5) includes a steam turbine (51), a liquefier (52), and a connecting pipe (53). The inlet of the steam turbine (51) is connected to the fourth pipe (10), the outlet of the steam turbine (51) is connected to the inlet of the liquefier (52) through the connecting pipe (53), and the outlet of the liquefier (52) is connected to the fifth pipe (11). The liquefier (52) structure includes a liquid ammonia pipe (521), a liquefier shell (522), and a carbon dioxide pipe (523). The liquid ammonia pipe (521) is fixedly connected to the inner wall of the liquefier shell (522). The liquid ammonia pipe (521) is connected to a liquid ammonia supply pipe. The inlet of the carbon dioxide pipe (523) is connected to the connecting pipe (53). The outlet of the carbon dioxide pipe (523) is connected to the pipe (11). The carbon dioxide pipe (523) is fixedly connected inside the liquid ammonia pipe (521). The purification device (6) includes a purification tower body (62) and a flash tank (63). The flash tank (63) is fixedly connected to the bottom of the purification tower body (62). The top of the flash tank (63) is provided with a vent valve (64). The bottom of the flash tank (63) is provided with a liquid outlet (65). The left side of the flash tank (63) is connected to pipe five (11). The liquid outlet (65) is connected to pipe six (12). The top of the purification tower body (62) is provided with a recovery pipe (66). The recovery pipe (66) is connected to an external waste gas pipe. The production method for enhancing carbon dioxide production includes the following steps: S1, Raw material gas compression: The raw gas is introduced into the buffer tank (1). The buffer tank (1) filters the scum, dust particles and moisture in the raw gas and provides a stable gas source for the compression device (2). The raw gas is introduced into the compression device (2) through the buffer tank (1) and compressed by the compression device (2) to increase the gas pressure of carbon dioxide gas and cool the carbon dioxide gas. S2, Raw gas desulfurization: Carbon dioxide gas enters the desulfurization unit (3) through the compression device (2). Medium-pressure steam is added to the carbon dioxide gas through the gas-liquid separator (31) in the desulfurization unit (3), so that the organic sulfur substances in the carbon dioxide gas dissolve in the steam. After the steam passes through the gas-liquid separator (31), the liquid water enters the hydrolysis desulfurization tower (32) and is hydrolyzed by the hydrolysis desulfurizing agent to decompose the organic sulfur into hydrogen sulfide gas and recover it. The gaseous carbon dioxide is passed into the purification device (4) through the cooler (34). The desulfurizing agent layer (43) of the purification device (4) adsorbs the residual hydrogen sulfide gas and organic sulfur substances in the carbon dioxide gas. S3: Liquefaction of carbon dioxide gas: The carbon dioxide raw material gas after passing through the refining device (4) enters the liquefaction device (5) through the pipeline four (10). The carbon dioxide raw material gas is pressurized by the steam turbine (51). The pressurized carbon dioxide raw material gas enters the liquefaction unit (52) and undergoes heat exchange through the liquid ammonia pipeline (521) to liquefy the gaseous carbon dioxide. S4: Liquid carbon dioxide purification: The liquid carbon dioxide raw material gas from the liquefaction device (5) enters the purification device (6) through pipe five (11). After passing through the flash tank (63) of the purification device (6), the liquid N2, H2, CH4 and O2 with higher boiling points are vaporized and separated from the liquid carbon dioxide to obtain pure liquid carbon dioxide. Then, it is passed through pipe six (12) into the storage cylinder for storage.

2. The production method for enhancing carbon dioxide production as described in claim 1, characterized in that, The pressure of the raw material gas after compression by the compression device in step S1 is 2.5-2.6 MPa, the pressure of the medium-pressure steam in step S2 is 2.6-2.8 MPa, the pressure of the carbon dioxide gas after being pressurized by the steam turbine (51) in step S3 is 2.0-2.3 MPa, and the liquefaction temperature in the liquefaction unit (52) is -16~-18℃.

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