Cylindrical carbon dioxide two-stage enrichment tower device
By designing a cylindrical carbon dioxide two-stage enrichment tower device, using polymer materials and negative pressure capture technology, the problem of low CO2 capture efficiency in the nonferrous metallurgy industry has been solved, and efficient CO2 resource utilization and energy consumption reduction have been achieved. , improves equipment life and emission reduction capabilities.
Patent Information
- Application Number
- CN202411374500.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2024-12-27
AI Technical Summary
During the smelting process, the nonferrous metallurgy industry has problems such as coexistence of flue gas, high sulfur species content, large gas temperature fluctuations, and high water vapor content, resulting in low CO2 capture efficiency, short equipment service life and high energy consumption, resulting in CO2 resources. Inadequate utilization of chemicals and emission reduction situations are severe.
A cylindrical carbon dioxide two-stage enrichment tower device is designed, including imported induced fan, first- and second-stage enrichment tower, vacuum pump, centrifugal fan and buffer gas storage cabinet, and a capture film made of polymer materials. It can withstand acid and alkali corrosion, use negative pressure to capture CO2 gas, achieve two-stage enrichment, and the CO2 concentration can reach more than 80%.
It improves the capture efficiency of CO2 gas, reduces energy consumption, extends the service life of the equipment, improves the utilization rate of CO2 resources, and alleviates the pressure of emission reduction.
Smart Images
Figure CN119186207A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the fields of nonferrous metallurgy and gas separation, and in particular to a cylindrical two-stage carbon dioxide enrichment tower device. Background Art
[0002] Nonferrous metallurgical furnaces are core energy-consuming equipment in the metallurgical industry, but their low energy efficiency, high energy consumption and large CO2 emissions are bottlenecks that restrict the realization of the "dual carbon" goals of the nonferrous metallurgical industry. CO2 emissions from the nonferrous metallurgical industry account for more than 6% of the country's total emissions. Therefore, carbon emission reduction is the most realistic challenge facing the metallurgical industry. CO2 capture and utilization of end-negative carbon technology is an effective way to achieve green and low-carbon development of my country's metallurgical industry under the background of carbon neutrality.
[0003] However, the nonferrous metallurgical industry is different from the steel metallurgical industry. In the smelting process, there are problems such as the coexistence of multiple components in the flue gas, high content of harmful substances such as sulfur species, large temperature fluctuations in the gas, and high water vapor content. These problems result in low CO2 capture efficiency, short equipment life, and high energy consumption, resulting in insufficient resource utilization of CO2 in metallurgical furnaces and a severe emission reduction situation.
[0004] Therefore, it is necessary to provide a cylindrical two-stage carbon dioxide enrichment tower device to solve the above technical problems. Summary of the invention
[0005] The present invention provides a cylindrical two-stage carbon dioxide enrichment tower device, which solves the problem that the non-ferrous metallurgical industry is different from the iron and steel metallurgical industry in that during the smelting process, there are problems such as the coexistence of multiple components in the flue gas, high content of harmful substances such as sulfur species, large temperature fluctuations in the gas, high water vapor content, etc., which result in low CO2 capture efficiency, short equipment service life, high energy consumption, insufficient resource utilization of CO2 in metallurgical furnaces, and a severe emission reduction situation.
[0006] In order to solve the above technical problems, the present invention provides a cylindrical two-stage carbon dioxide enrichment tower device, comprising: An inlet induced draft fan, a first-level enriching tower air inlet pipe, a first-level enriching tower, a first-level enriching tower exhaust gas discharge pipe, a first-level enriching tower rich CO2 outlet pipe, a first-level vacuum pump, a first-level centrifugal fan, a second-level enriching tower air inlet pipe, a second-level enriching tower, a second-level enriching tower exhaust gas reflux pipe, a second-level enriching tower CO2 outlet pipe, a second-level vacuum pump, a second-level centrifugal fan, a buffer gas storage cabinet and a rich CO2 outlet pipe in the enriching tower, one end of the inlet induced draft fan is connected to one end of the first-level enriching tower air inlet pipe, one end of the first-level enriching tower air inlet pipe is connected to one end of the first-level enriching tower, the first-level enriching tower is respectively connected to the first-level enriching tower exhaust gas discharge pipe, the first-level enriching tower rich CO2 outlet pipe and the second-level enriching tower air inlet pipe, the second-level enriching tower is installed on the top of the first-level enriching tower, the second-level enriching tower CO2 outlet pipe and the second-level enriching tower exhaust gas reflux pipe are respectively connected to the second-level enriching tower.
[0007] Preferably, the inlet induced draft fan comprises an inlet pipe, an inlet CO2 content analyzer, an inlet electric ventilation butterfly valve, an inlet damping section, an induced draft fan, an outlet damping section, an outlet electric ventilation butterfly valve, an outlet pipe, an inlet local pressure gauge, an inlet pressure sensor, an outlet local pressure gauge and an outlet pressure sensor, the inlet CO2 content analyzer is installed on the surface of the inlet pipe, the inlet electric ventilation butterfly valve is installed at one end of the inlet pipe, the inlet damping section is arranged at one end of the inlet pipe, the induced draft fan is installed at one end of the inlet damping section, the outlet damping section is installed and connected to one end of the induced draft fan, the outlet electric ventilation butterfly valve is installed at one end of the outlet damping section, one end of the outlet pipe is connected to one end of the outlet electric ventilation butterfly valve, the inlet local pressure gauge and the inlet pressure sensor are both installed on the surface of the inlet pipe, and the outlet local pressure gauge and the outlet pressure sensor are both installed on the surface of the outlet pipe.
[0008] Preferably, the first-level enrichment tower rich CO2 outlet pipe comprises a first-layer enrichment tower rich CO2 outlet branch pipe, a second-layer enrichment tower rich outlet branch pipe and an outlet main pipe, and the outlet main pipe is installed with one end of the first-layer enrichment tower rich CO2 outlet branch pipe.
[0009] Preferably, the CO2-rich outlet branch pipe of the first-layer enrichment tower and the CO2-rich outlet branch pipe of the second-layer enrichment tower both include welding flanges, seamless steel pipes, special manhole flanges, sealing rubber rings, special pressure plate flanges, fastening bolts, spring washers, threaded flanges and outlet shut-off valves, the welding flanges and the threaded flanges are respectively arranged at both ends of the seamless steel pipes, the special manhole flanges and the sealing rubber rings are respectively arranged on the surfaces of the seamless steel pipes, and the outlet shut-off valve is installed at one end of the threaded flanges.
[0010] Preferably, the first-stage vacuum pump includes an intake main pipe, an intake branch pipe, an intake electric butterfly valve, an intake expansion joint, an intake local pressure gauge, an intake pressure sensor, a vacuum pump, an air local pressure gauge, an intake pressure sensor, an outlet expansion joint, an outlet electric butterfly valve, an outlet branch pipe and an outlet main pipe, the intake branch pipe is connected to the intake main pipe, the vacuum pump is installed at the top of the intake branch pipe, the intake expansion joint is installed at one end of the vacuum pump, the intake electric butterfly valve is installed at the top of the intake expansion joint, the intake local pressure gauge and the intake pressure sensor are respectively installed on the left and right sides of the surface of the intake expansion joint, the outlet expansion joint is installed at the bottom of the vacuum pump, the outlet electric butterfly valve is installed at one end of the outlet expansion joint, the air local pressure gauge and the intake pressure sensor are respectively installed on the left and right sides of the surface of the outlet expansion joint.
[0011] Preferably, the first-stage centrifugal fan includes an air inlet pipe, a first electric butterfly valve, a first bellows compensator, a centrifugal fan and an air outlet pipe, the first electric butterfly valve is installed at one end of the air inlet pipe, the first bellows compensator is installed at one end of the first electric butterfly valve, the centrifugal fan is installed at one end of the first bellows compensator, and the air outlet pipe is also installed at one end of the first electric butterfly valve.
[0012] Preferably, the secondary centrifugal fan includes an inlet pipe, a third electric butterfly valve, a third bellows compensator, a centrifugal fan, a CO2 content analyzer, an outlet pipe and a reflux valve, the centrifugal fan is installed at one end of the inlet pipe, the third bellows compensator is installed at one end of the centrifugal fan, the third electric butterfly valve is installed at the top of the third bellows compensator, the CO2 content analyzer is installed on the surface of the third electric butterfly valve, the outlet pipe is installed at one end of the third electric butterfly valve, and one end of the outlet pipe is connected to the reflux valve.
[0013] Preferably, an inlet pipe and an outlet pipe are installed at one end of the air inlet electric butterfly valve and the air outlet electric butterfly valve, respectively.
[0014] Preferably, the main function of the secondary vacuum pump is to pump the gas with a CO2 content of 80% out of the secondary enrichment tower.
[0015] Preferably, the first-stage centrifugal fan is used to pressurize the slightly positive pressure CO2-rich gas sucked out by the first-stage vacuum pump.
[0016] Compared with the related art, the cylindrical two-stage carbon dioxide enrichment tower device provided by the present invention has the following beneficial effects: The present invention provides a cylindrical two-stage carbon dioxide enrichment tower device, which can withstand a higher flue gas working pressure, thereby improving the CO2 gas capture efficiency.
[0017] The capture membrane is made of polymer materials and can withstand acid and alkali corrosion. It is suitable for the carbon dioxide capture system in the flue gas of non-ferrous metallurgical furnaces.
[0018] The use of negative pressure to capture CO2 gas has lower energy consumption than positive pressure capture or adsorption devices.
[0019] Using two-stage enriched CO2 gas, the concentration can reach over 80%. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A schematic structural diagram of a preferred embodiment of a cylindrical two-stage carbon dioxide enrichment tower device provided by the present invention; Figure 2 This is a plan view of the cylindrical CO2 two-stage enrichment tower device of the present invention; Figure 3This is a vertical layout diagram of the CO2-enriched gas outlet pipe of the first-stage enrichment tower of the cylindrical CO2 two-stage enrichment tower device of the present invention; Figure 4 It is a vertical layout diagram of the CO2-enriched gas outlet pipe of the second-stage enrichment tower of the cylindrical CO2 two-stage enrichment tower device of the present invention; Figure 5 This is a layout diagram of the exhaust fan at the flue gas inlet of the enrichment tower of the present invention; Figure 6 This is a vertical layout diagram of the flue gas inlet pipe of the first-stage enrichment tower of the present invention; Figure 7 This is a diagram of the CO2 gas enrichment membrane conditions of the present invention; Figure 8 This is a schematic diagram of the connection between the enrichment membrane and the flower plate of the enrichment tower of the present invention; Fig. 9 This is a schematic diagram of the connection between the enrichment membrane of the enrichment tower and the CO2-rich outlet pipe of the present invention; Fig.10 This is a plan view of the enriched gas outlet pipe of the first-stage enrichment tower of the present invention; Fig.11 This is a vertical layout diagram of the enriched gas outlet pipe of the first-stage enrichment tower of the present invention; Fig.12 This is a plan view of the reinforced steel structure of the top plate of the first-level enrichment tower of the present invention; Fig.13 This is a elevational layout diagram of the second-layer enrichment tower of the first-level enrichment tower of the present invention; Fig.14 It is a schematic diagram of the exhaust gas discharge and enriched gas recovery pipeline of the second layer of the first-level enrichment tower of the present invention; Fig.15 This is a schematic diagram of the air inlet box of the second-layer enrichment tower of the first-level enrichment tower of the present invention; Fig.16 This is a schematic diagram of the bottom reinforcement support of the air inlet box of the second-layer enrichment tower of the present invention; Fig.17 This is a schematic diagram of the exhaust gas discharge pipeline of the first-stage enrichment tower of the present invention; Fig.18 This is a schematic diagram of the enriched gas recovery pipeline of the first-level enrichment tower of the present invention; Fig.19 This is a schematic diagram of the CO2-rich outlet branch pipe of the enrichment tower of the present invention; Fig. 20 This is a schematic cross-sectional view of a specially made manhole flange for the CO2-rich outlet branch pipe of the enrichment tower of the present invention; Fig.21 This is a schematic plan view of a specially made manhole flange for the CO2-rich outlet branch pipe of the enrichment tower of the present invention; Fig. 22 This is a schematic diagram of the sealing rubber ring of the CO2 enrichment tower outlet branch pipe of the present invention; Fig.23This is a schematic plan view of a specially made pressure plate flange for the CO2-rich outlet branch pipe of the enrichment tower of the present invention; Fig.24 This is a schematic cross-sectional view of a specially made pressure plate flange for the CO2-rich outlet branch pipe of the enrichment tower of the present invention; Fig.25 It is a cross-sectional schematic diagram of the threaded connection flange of the CO2 enrichment tower outlet branch pipe of the present invention; Fig.26 This is the layout diagram of the primary vacuum pump of the enrichment tower of the present invention; Fig. 27 This is a elevational layout diagram of the primary vacuum pump of the enrichment tower of the present invention; Fig.28 This is a schematic diagram of the first-stage centrifugal fan of the enrichment tower of the present invention; Fig.29 This is a elevational layout diagram of the secondary enrichment tower of the present invention; Fig.30 This is a plan view of the secondary enrichment tower of the present invention; Fig.31 This is the layout diagram of the vacuum pump for the CO2-rich outlet of the secondary enrichment tower of the present invention; Fig.32 This is the layout diagram of the CO2-rich gas two-stage pressurizing blower of the present invention.
[0021] Numbers in the figure: 1. Imported induced draft fan; 2. Air inlet pipe of primary enrichment tower; 3. Primary enrichment tower; 4. Exhaust gas discharge pipe of primary enrichment tower; 5. Rich CO2 outlet pipe of primary enrichment tower; 6. Primary vacuum pump; 7. Primary centrifugal fan; 8. Air inlet pipe of secondary enrichment tower; 9. Secondary enrichment tower; 10. Exhaust gas reflux pipe of secondary enrichment tower; 11. CO2 outlet pipe of secondary enrichment tower; 12. Secondary vacuum pump; 13. Secondary centrifugal fan; 14. Buffer gas storage cabinet; 15. Import pipe; 16. Import CO2 content analyzer; 17. Import electric ventilation butterfly valve; 18. Import damping section; 19. induced draft fan; 20. Outlet damping section; 21. Outlet electric ventilation butterfly valve; 22. Outlet pipe; 23. Import local pressure gauge; 24. Import pressure sensor sensor; 25, outlet local pressure gauge; 26, outlet pressure sensor; 27, primary enrichment tower inlet main pipe; 28, primary enrichment tower first layer enrichment tower inlet branch pipe; 29, first layer enrichment tower inlet electric shut-off valve; 30, stainless steel corrugated compensator; 31, primary enrichment tower second layer enrichment tower inlet branch pipe; 32, second layer enrichment tower inlet electric shut-off valve; 33, stainless steel corrugated compensator; 58, top plate; 59, first top plate reinforced steel structure; 60, special outlet pipe socket; 61, exhaust gas outlet socket; 62, second inspection manhole; 63, base flange; 64, sealing rubber ring; 65, stainless steel metal winding pad; 66, flange pressure plate; 67, fastening bolts; 68, spring washer; 69, transparent hose; 70 throat Hoop; 71, outlet main pipe; 72, first outlet outer ring pipe; 73, first outlet inner ring pipe; 74, first inner and outer ring pipe connecting pipe; 75, first enrichment membrane interface pipe; 76, second air inlet box; 77, bottom reinforcement support; 78, first layer enrichment tower discharge branch pipe; 79, discharge main pipe; 80, second layer enrichment tower discharge branch pipe; 81, first layer enrichment tower rich CO22 outlet branch pipe; 82, second layer enrichment tower rich outlet branch pipe; 83, outlet main pipe; 84 welding flange; 85, seamless steel pipe; 86, special manhole flange; 87, sealing rubber ring; 88, special pressure plate flange; 89, fastening bolts; 90, spring washer; 91, threaded connection flange; 92, outlet cut-off valve; 93, air inlet main pipe; 94, air inlet branch pipe; 95. Inlet electric butterfly valve; 96. Inlet expansion joint; 97. Inlet local pressure gauge; 98. Inlet pressure sensor; 99. Vacuum pump; 100. Inlet local pressure gauge; 101. Inlet pressure sensor; 102. Exhaust expansion joint; 103. Exhaust electric butterfly valve; 104. Exhaust branch pipe; 105. Exhaust main pipe; 106. Air inlet pipe; 107. Electric butterfly valve; 108. Bellows compensator; 109. Centrifugal fan; 110. Exhaust pipe; 111. Air inlet duct; 112. Electric butterfly valve; 113. Bellows compensator; 114. Third air inlet box; 115. Second enrichment box; 116. Second CO22 rich outlet pipe; 117. Second bottom plate; 118. Second side plate; 119. Second upper connecting flange;120, second air inlet pipe socket; 121, second flange plate; 122, second top plate reinforcement steel structure; 123, exhaust gas return port pipe socket; 124, second outlet outer ring pipe; 125, second outlet inner ring pipe; 126, second inner and outer ring pipe connecting pipe. ; DETAILED DESCRIPTION
[0022] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.
[0023] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 , Fig.14 , Fig.15 , Fig.16 , Fig.17 , Fig.18 , Fig.19 , Fig. 20 , Fig.21 , Fig. 22 , Fig.23 , Fig.24 , Fig.25 , Fig.26 , Fig. 27 , Fig.28 , Fig.29 , Fig.30 , Fig.31 and Fig.32 ,in, Figure 1 A schematic structural diagram of a preferred embodiment of a cylindrical two-stage carbon dioxide enrichment tower device provided by the present invention; Figure 2 This is a plan view of the cylindrical CO2 two-stage enrichment tower device of the present invention; Figure 3 This is a vertical layout diagram of the CO2-enriched gas outlet pipe of the first-stage enrichment tower of the cylindrical CO2 two-stage enrichment tower device of the present invention; Figure 4 It is a vertical layout diagram of the CO2-enriched gas outlet pipe of the second-stage enrichment tower of the cylindrical CO2 two-stage enrichment tower device of the present invention; Figure 5 This is a layout diagram of the exhaust fan at the flue gas inlet of the enrichment tower of the present invention; Figure 6 This is a vertical layout diagram of the flue gas inlet pipe of the first-stage enrichment tower of the present invention; Figure 7 This is a diagram of the CO2 gas enrichment membrane conditions of the present invention; Figure 8 This is a schematic diagram of the connection between the enrichment membrane and the flower plate of the enrichment tower of the present invention; Fig. 9 This is a schematic diagram of the connection between the enrichment membrane of the enrichment tower and the CO2-rich outlet pipe of the present invention; Fig.10This is a plan view of the enriched gas outlet pipe of the first-stage enrichment tower of the present invention; Fig.11 This is a vertical layout diagram of the enriched gas outlet pipe of the first-stage enrichment tower of the present invention; Fig.12 This is a plan view of the reinforced steel structure of the top plate of the first-level enrichment tower of the present invention; Fig.13 This is a elevational layout diagram of the second-layer enrichment tower of the first-level enrichment tower of the present invention; Fig.14 It is a schematic diagram of the exhaust gas discharge and enriched gas recovery pipeline of the second layer of the first-level enrichment tower of the present invention; Fig.15 This is a schematic diagram of the air inlet box of the second-layer enrichment tower of the first-level enrichment tower of the present invention; Fig.16 This is a schematic diagram of the bottom reinforcement support of the air inlet box of the second-layer enrichment tower of the present invention; Fig.17 This is a schematic diagram of the exhaust gas discharge pipeline of the first-stage enrichment tower of the present invention; Fig.18 This is a schematic diagram of the enriched gas recovery pipeline of the first-level enrichment tower of the present invention; Fig.19 This is a schematic diagram of the CO2-rich outlet branch pipe of the enrichment tower of the present invention; Fig. 20 This is a schematic cross-sectional view of a specially made manhole flange for the CO2-rich outlet branch pipe of the enrichment tower of the present invention; Fig.21 This is a schematic plan view of a specially made manhole flange for the CO2-rich outlet branch pipe of the enrichment tower of the present invention; Fig. 22 This is a schematic diagram of the sealing rubber ring of the CO2 enrichment tower outlet branch pipe of the present invention; Fig.23 This is a schematic plan view of a specially made pressure plate flange for the CO2-rich outlet branch pipe of the enrichment tower of the present invention; Fig.24 This is a schematic cross-sectional view of a specially made pressure plate flange for the CO2-rich outlet branch pipe of the enrichment tower of the present invention; Fig.25 It is a cross-sectional schematic diagram of the threaded connection flange of the CO2 enrichment tower outlet branch pipe of the present invention; Fig.26 This is the layout diagram of the primary vacuum pump of the enrichment tower of the present invention; Fig. 27 This is a elevational layout diagram of the primary vacuum pump of the enrichment tower of the present invention; Fig.28 This is a schematic diagram of the first-stage centrifugal fan of the enrichment tower of the present invention; Fig.29 This is a elevational layout diagram of the secondary enrichment tower of the present invention; Fig.30 This is a plan view of the secondary enrichment tower of the present invention; Fig.31 This is the layout diagram of the vacuum pump for the CO2-rich outlet of the secondary enrichment tower of the present invention; Fig.32 The present invention is a layout diagram of the two-stage CO2-rich gas pressurizing blower. A cylindrical carbon dioxide two-stage enrichment tower device comprises: An inlet induced draft fan 1, a first-stage enrichment tower air inlet pipe 2, a first-stage enrichment tower 3, a first-stage enrichment tower exhaust gas discharge pipe 4, a first-stage enrichment tower CO2-rich outlet pipe 5, a first-stage vacuum pump 6, a first-stage centrifugal fan 7, a second-stage enrichment tower air inlet pipe 8, a second-stage enrichment tower 9, a second-stage enrichment tower exhaust gas reflux pipe 10, a second-stage enrichment tower CO2 outlet pipe 11, a second-stage vacuum pump 12, a second-stage centrifugal fan 13, a buffer gas storage cabinet 14 and a CO2-rich outlet pipe 40 in the enrichment tower, wherein one end of the inlet induced draft fan 1 is connected to the One end of the first-level enriching tower air inlet pipe 2 is connected, one end of the first-level enriching tower air inlet pipe 2 is connected to one end of the first-level enriching tower 3, the first-level enriching tower 3 is respectively connected to the first-level enriching tower exhaust gas discharge pipe 4, the first-level enriching tower rich CO2 outlet pipe 5 and the second-level enriching tower air inlet pipe 8, the second-level enriching tower 9 is installed on the top of the first-level enriching tower 3, the second-level enriching tower CO2 outlet pipe 11 and the second-level enriching tower exhaust gas reflux pipe 10 are respectively connected to the second-level enriching tower 9.
[0024] The inlet induced draft fan 1 comprises an inlet pipe 15, an inlet CO2 content analyzer 16, an inlet electric ventilation butterfly valve 17, an inlet damping section 18, an induced draft fan 19, an outlet damping section 20, an outlet electric ventilation butterfly valve 21, an outlet pipe 22, an inlet local pressure gauge 23, an inlet pressure sensor 24, an outlet local pressure gauge 25 and an outlet pressure sensor 26. The inlet CO2 content analyzer 16 is installed on the surface of the inlet pipe 15, the inlet electric ventilation butterfly valve 17 is installed at one end of the inlet pipe 15, and the inlet damping section 18 is arranged on the inlet The inlet pipe 15 is provided at one end, the induced draft fan 19 is installed at one end of the inlet damping section 18, the outlet damping section 20 is installed at one end of the induced draft fan 19, the outlet electric ventilation butterfly valve 21 is installed at one end of the outlet damping section 20, one end of the outlet pipe 22 is connected to one end of the outlet electric ventilation butterfly valve 21, the inlet local pressure gauge 23 and the inlet pressure sensor 24 are both installed on the surface of the inlet pipe 15, and the outlet local pressure gauge 25 and the outlet pressure sensor 26 are both installed on the surface of the outlet pipe 22.
[0025] The first-level enrichment tower rich CO2 outlet pipe 5 includes a first-layer enrichment tower rich CO2 outlet branch pipe 81, a second-layer enrichment tower rich outlet branch pipe 82 and an outlet main pipe 83, and the outlet main pipe 83 is installed with one end of the first-layer enrichment tower rich CO2 outlet branch pipe 81.
[0026] The first-layer enrichment tower CO2-rich gas outlet branch pipe 81 and the second-layer enrichment tower CO2-rich gas outlet branch pipe 82 both include a welding flange 84, a seamless steel pipe 85, a special manhole flange 86, a sealing rubber ring 87, a special pressure plate flange 88, a fastening bolt 89, a spring washer 90, a threaded connection flange 91 and a gas outlet shut-off valve 92. The welding flange 84 and the threaded connection flange 91 are respectively arranged at both ends of the seamless steel pipe 85, the special manhole flange 86 and the sealing rubber ring 87 are respectively arranged on the surface of the seamless steel pipe 85, and the gas outlet shut-off valve 92 is installed at one end of the threaded connection flange 91.
[0027] The primary vacuum pump 6 includes an air intake main pipe 93, an air intake branch pipe 94, an air intake electric butterfly valve 95, an air intake expansion joint 96, an air intake local pressure gauge 97, an air intake pressure sensor 98, a vacuum pump 99, an air intake local pressure gauge 100, an air intake pressure sensor 101, an air outlet expansion joint 102, an air outlet electric butterfly valve 103, an air outlet branch pipe 104 and an air outlet main pipe 105. The air intake branch pipe 94 is connected to the air intake main pipe 93, the vacuum pump 99 is installed at the top of the air intake branch pipe 94, and the air intake expansion joint 96 is installed at the The vacuum pump 99 is installed at one end of the vacuum pump 99, the air intake electric butterfly valve 95 is installed on the top of the air intake expansion joint 96, the air intake local pressure gauge 97 and the air intake pressure sensor 98 are respectively installed on the left and right sides of the surface of the air intake expansion joint 96, the air outlet expansion joint 102 is installed at the bottom end of the vacuum pump 99, the air outlet electric butterfly valve 103 is installed at one end of the air outlet expansion joint 102, the air intake local pressure gauge 100 and the air intake pressure sensor 101 are respectively installed on the left and right sides of the surface of the air outlet expansion joint 102.
[0028] The first-stage centrifugal fan 7 includes an air inlet pipe 106, a first electric butterfly valve 107, a first corrugated compensator 108, a centrifugal fan 109 and an air outlet pipe 110. The first electric butterfly valve 107 is installed at one end of the air inlet pipe 106, the first corrugated compensator 108 is installed at one end of the first electric butterfly valve 107, the centrifugal fan 109 is installed at one end of the first corrugated compensator 108, and the air outlet pipe 110 is also installed at one end of the first electric butterfly valve 107.
[0029] The secondary centrifugal fan 13 includes an inlet pipe 135, a third electric butterfly valve 136, a third bellows compensator 137, a centrifugal fan 138, a CO2 content analyzer 139, an outlet pipe 140 and a reflux valve 141. The centrifugal fan 138 is installed at one end of the inlet pipe 135, the third bellows compensator 137 is installed at one end of the centrifugal fan 138, the third electric butterfly valve 136 is installed at the top of the third bellows compensator 137, the CO2 content analyzer 139 is installed on the surface of the third electric butterfly valve 136, the outlet pipe 140 is installed at one end of the third electric butterfly valve 136, and one end of the outlet pipe 140 is connected to the reflux valve 141.
[0030] An inlet pipe 133 and an outlet pipe 134 are respectively installed at one end of the air inlet electric butterfly valve 95 and the air outlet electric butterfly valve 103 .
[0031] The main function of the secondary vacuum pump 12 is to pump the gas with a CO2 content of 80% out of the secondary enrichment tower.
[0032] The primary centrifugal fan 7 is used to pressurize the slightly positive pressure CO2-rich gas sucked out by the primary vacuum pump 6.
[0033] Among them, the bottom bracket is welded to the bottom of the air intake box and is made of steel; the air intake box 37 and the enrichment box 38 are connected using a bolt connection pair 48, and a stainless steel graphite winding pad 49 is arranged in the middle to facilitate the anti-corrosion maintenance inside the air intake box.
[0034] The cylindrical CO2 two-stage enrichment tower device is configured as a cylindrical structure, which can withstand a higher operating pressure to improve the enrichment efficiency.
[0035] The first-stage enrichment tower air inlet pipe 2 is made of PP material. The valve body and valve core of the imported electric cut-off valve 29 are made of stainless steel.
[0036] In the present invention, the primary enrichment tower 3 is composed of a first-layer enrichment tower 34 and a second-layer enrichment tower 35. Both layers of the enrichment towers are cylindrical structures and are installed in an overlapping manner.
[0037] The air intake box and the enrichment box are connected by bolts, and a stainless steel graphite winding gasket is arranged in the middle to facilitate the anti-corrosion maintenance inside the air intake box.
[0038] The number of thread hole columns is set according to the diameter of the enrichment box, and bolt thread holes connected to the wall panels are drilled on the flange panels; the wall panels of the enrichment box are arranged into several detachable pieces to facilitate the installation of the enrichment membrane and the tightness test inspection.
[0039] The use of polymer enrichment membranes can resist acid and alkali corrosion from harmful substances in flue gas. The use of negative pressure capture systems has lower energy consumption than positive pressure capture systems. Multiple cylindrical two-stage capture towers can be installed in parallel. Since carbon dioxide is soluble in water, dry gas holders should be used as gas storage tanks for this system.
[0040] Taking a cylindrical two-stage carbon dioxide enrichment tower with a flue gas flow rate of 14000m³ / h as an example, the technical solution in the embodiment of the patent of the present invention is clearly and completely described.
[0041] A cylindrical two-stage carbon dioxide enrichment tower suitable for flue gas from non-ferrous metallurgical furnaces, with a flue gas inlet CO2 content of 5%, a normal inlet temperature, a flue gas flow rate of 14000m³ / h, and a flue gas working pressure of 5kPa after being pressurized by an induced draft fan.
[0042] One induced draft fan is set, model 9-19NO.10D, flow rate 15455m³ / h, total pressure 5kPa, motor power 37kW. A CO2 content analyzer is set on the inlet pipe of the induced draft fan to record the CO2 content of the flue gas entering the system for online monitoring.
[0043] The first-level capture tower is equipped with two layers of enrichment towers, with a tower body diameter of φ3.22m and 37 CO2 capture membranes installed inside. Under the working pressure of -75kPa, the flow rate of enriched gas with a CO2 content of 20% for a single CO2 capture membrane is 30m³ / h; the flow rate of enriched gas with a CO2 content of 20% for a single tower is 1110m³ / h; the flow rate for double towers is 2220m³ / h.
[0044] Three first-stage vacuum pumps are arranged in parallel, the vacuum pump model is XYD-300C(S), the flow rate of a single unit is 1150m³ / h, and the full load power of the motor is 39.6kW.
[0045] The first-stage booster fan model is 9-19NO.4.5A, with a flow rate of 2500m³ / h, a wind pressure of 4kPa, and a motor power of 7.5kW.
[0046] The secondary capture tower is equipped with an enrichment tower with a diameter of φ2.42m and 22 CO2 capture membranes installed inside. Under the working pressure of -75kPa, the flow rate of enriched gas with a CO2 content of 80% is 30m³ / h for a single CO2 capture membrane; the flow rate of enriched gas with a CO2 content of 80% is 630m³ / h. The exhaust gas from the secondary capture tower is refluxed to the inlet pipe of the induced draft fan to capture CO2 gas for the second time.
[0047] One secondary vacuum pump is provided, the vacuum pump model is XYD-200C(S), the rated flow rate is 720m³ / h, and the full load power of the motor is 28.7kW.
[0048] The model of the secondary booster fan is 9-19NO.4A, with a flow rate of 1200m³ / h, a wind pressure of 3.5kPa, and a motor power of 3.7kW. A CO2 content analyzer is installed at the outlet pipe of the secondary booster fan. Unqualified CO2 gas flows back to the secondary capture tower for re-enrichment; qualified CO2 gas enters the buffer gas storage cabinet.
[0049] The buffer gas storage tank is designed as a cylindrical rubber membrane sealed dry gas tank with a capacity of 750m³ and a gas tank diameter of φ10m. The gas in the tank is sent to downstream users after secondary pressurization.
[0050] Compared with the related art, the cylindrical two-stage carbon dioxide enrichment tower device provided by the present invention has the following beneficial effects: The present invention provides a cylindrical two-stage carbon dioxide enrichment tower device, which can withstand a higher flue gas working pressure, thereby improving the CO2 gas capture efficiency.
[0051] The capture membrane is made of polymer materials and can withstand acid and alkali corrosion. It is suitable for the carbon dioxide capture system in the flue gas of non-ferrous metallurgical furnaces.
[0052] The use of negative pressure to capture CO2 gas has lower energy consumption than positive pressure capture or adsorption devices.
[0053] Using two-stage enriched CO2 gas, the concentration can reach over 80%.
[0054] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A cylindrical two-stage carbon dioxide enrichment tower device, characterized in that: include: An inlet induced draft fan, a first-level enriching tower air inlet pipe, a first-level enriching tower, a first-level enriching tower exhaust gas discharge pipe, a first-level enriching tower rich CO2 outlet pipe, a first-level vacuum pump, a first-level centrifugal fan, a second-level enriching tower air inlet pipe, a second-level enriching tower, a second-level enriching tower exhaust gas reflux pipe, a second-level enriching tower CO2 outlet pipe, a second-level vacuum pump, a second-level centrifugal fan, a buffer gas storage cabinet and a rich CO2 outlet pipe in the enriching tower, one end of the inlet induced draft fan is connected to one end of the first-level enriching tower air inlet pipe, one end of the first-level enriching tower air inlet pipe is connected to one end of the first-level enriching tower, the first-level enriching tower is respectively connected to the first-level enriching tower exhaust gas discharge pipe, the first-level enriching tower rich CO2 outlet pipe and the second-level enriching tower air inlet pipe, the second-level enriching tower is installed on the top of the first-level enriching tower, the second-level enriching tower CO2 outlet pipe and the second-level enriching tower exhaust gas reflux pipe are respectively connected to the second-level enriching tower.
2. The cylindrical two-stage carbon dioxide enrichment tower device according to claim 1, characterized in that: The inlet induced draft fan comprises an inlet pipe, an inlet CO2 content analyzer, an inlet electric ventilation butterfly valve, an inlet damping section, an induced draft fan, an outlet damping section, an outlet electric ventilation butterfly valve, an outlet pipe, an inlet local pressure gauge, an inlet pressure sensor, an outlet local pressure gauge and an outlet pressure sensor. The inlet CO2 content analyzer is installed on the surface of the inlet pipe, the inlet electric ventilation butterfly valve is installed at one end of the inlet pipe, the inlet damping section is arranged at one end of the inlet pipe, the induced draft fan is installed at one end of the inlet damping section, the outlet damping section is installed and connected to one end of the induced draft fan, the outlet electric ventilation butterfly valve is installed at one end of the outlet damping section, one end of the outlet pipe is connected to one end of the outlet electric ventilation butterfly valve, the inlet local pressure gauge and the inlet pressure sensor are both installed on the surface of the inlet pipe, and the outlet local pressure gauge and the outlet pressure sensor are both installed on the surface of the outlet pipe.
3. The cylindrical two-stage carbon dioxide enrichment tower device according to claim 1, characterized in that: The first-level enrichment tower CO2-rich outlet pipe includes a first-layer enrichment tower CO2-rich outlet branch pipe, a second-layer enrichment tower CO2-rich outlet branch pipe and an outlet main pipe, and the outlet main pipe is installed with one end of the first-layer enrichment tower CO2-rich outlet branch pipe.
4. The cylindrical two-stage carbon dioxide enrichment tower device according to claim 1, characterized in that: The CO2-rich outlet branch pipe of the first-layer enrichment tower and the CO2-rich outlet branch pipe of the second-layer enrichment tower both include welding flanges, seamless steel pipes, special manhole flanges, sealing rubber rings, special pressure plate flanges, fastening bolts, spring washers, threaded flanges and outlet shut-off valves. The welding flanges and the threaded flanges are respectively arranged at both ends of the seamless steel pipes, the special manhole flanges and the sealing rubber rings are respectively arranged on the surfaces of the seamless steel pipes, and the outlet shut-off valve is installed at one end of the threaded flanges.
5. The cylindrical two-stage carbon dioxide enrichment tower device according to claim 1, characterized in that: The first-stage vacuum pump includes an intake main pipe, an intake branch pipe, an intake electric butterfly valve, an intake expansion joint, an intake local pressure gauge, an intake pressure sensor, a vacuum pump, an air local pressure gauge, an intake pressure sensor, an outlet expansion joint, an outlet electric butterfly valve, an outlet branch pipe and an outlet main pipe. The intake branch pipe is connected to the intake main pipe, the vacuum pump is installed at the top of the intake branch pipe, the intake expansion joint is installed at one end of the vacuum pump, the intake electric butterfly valve is installed at the top of the intake expansion joint, the intake local pressure gauge and the intake pressure sensor are respectively installed on the left and right sides of the surface of the intake expansion joint, the outlet expansion joint is installed at the bottom of the vacuum pump, the outlet electric butterfly valve is installed at one end of the outlet expansion joint, and the air local pressure gauge and the intake pressure sensor are respectively installed on the left and right sides of the surface of the outlet expansion joint.
6. The cylindrical two-stage carbon dioxide enrichment tower device according to claim 1, characterized in that: The first-stage centrifugal fan includes an air inlet pipe, a first electric butterfly valve, a first bellows compensator, a centrifugal fan and an air outlet pipe. The first electric butterfly valve is installed at one end of the air inlet pipe, the first bellows compensator is installed at one end of the first electric butterfly valve, the centrifugal fan is installed at one end of the first bellows compensator, and the air outlet pipe is also installed at one end of the first electric butterfly valve.
7. The cylindrical two-stage carbon dioxide enrichment tower device according to claim 1, characterized in that: The secondary centrifugal fan includes an inlet pipe, a third electric butterfly valve, a third bellows compensator, a centrifugal fan, a CO2 content analyzer, an outlet pipe and a reflux valve. The centrifugal fan is installed at one end of the inlet pipe, the third bellows compensator is installed at one end of the centrifugal fan, the third electric butterfly valve is installed at the top of the third bellows compensator, the CO2 content analyzer is installed on the surface of the third electric butterfly valve, the outlet pipe is installed at one end of the third electric butterfly valve, and one end of the outlet pipe is connected to the reflux valve.
8. The cylindrical two-stage carbon dioxide enrichment tower device according to claim 5, characterized in that: An inlet pipe and an outlet pipe are respectively installed at one end of the air inlet electric butterfly valve and the air outlet electric butterfly valve.
9. The cylindrical two-stage carbon dioxide enrichment tower device according to claim 1, characterized in that: The main function of the secondary vacuum pump is to pump the gas with a CO2 content of 80% out of the secondary enrichment tower.
10. The cylindrical two-stage carbon dioxide enrichment tower device according to claim 1, characterized in that: The first-stage centrifugal fan is used to pressurize the slightly positive pressure CO2-rich gas sucked out by the first-stage vacuum pump.