Low-energy-consumption oxygen-enriched preparation device for cement kiln flue gas circulation

Abstract

The utility model relates to the technical field of cement processing, in particular to a low-energy-consumption oxygen-enriched preparation device for cement kiln flue gas circulation, which comprises a first conveying valve, an air filter, an air compressor, a second conveying valve and a kiln, the output end of the air compressor is connected with a dryer, the discharge end of the dryer is communicated with a first connecting pipe, and the first connecting pipe is communicated with a second connecting pipe. And one end of the first connecting pipe is respectively communicated with a first regulating valve and a first membrane oxygen enrichment skid-mounted device. According to the oxygen-enriched gas conveying device, oxygen-enriched gas can be conveyed through a plurality of components, when the oxygen-enriched gas conveying device is used, the nitrogen-enriched gas can be conveyed through the first conveying valve, meanwhile, the nitrogen-enriched gas can be conveyed through the communicating valve, the oxygen-enriched processing efficiency can be improved, meanwhile, the oxygen-enriched gas conveying device can still work normally when a certain component is damaged, and the nitrogen-enriched gas conveying device is suitable for large-scale popularization and application. Meanwhile, the first pressure gauge and the second pressure gauge can be matched with the flue gas analyzer to monitor the gas condition.

Description

Technical Field

[0001] This utility model relates to the field of cement processing technology, specifically to a low-energy oxygen enrichment device for circulating flue gas from cement kilns. Background Technology

[0002] Cement is named according to its main hydraulic minerals, admixtures, uses, and main characteristics, depending on its category. The naming should be concise and accurate, and abbreviations are allowed if the name is too long.

[0003] A search revealed that the announcement number is CN117906396A, entitled "A Low-Energy Oxygen-Enriching Device for Flue Gas Circulation in Cement Kilns," which includes a compressed air pipeline. Research and analysis showed that the device can effectively improve flue gas combustion efficiency and reduce emissions of pollutants such as NOx and SOx. However, it also has the following drawbacks to some extent.

[0004] For example, when this equipment is in use, it can only store and transport nitrogen-enriched gas through a single structure. If a component is damaged, the equipment will not be able to operate normally. Furthermore, it does not have the function of analyzing the circulating flue gas. If the flue gas purification effect is not good, it is easy to disrupt the normal operation of the kiln. In order to solve the above technical problems, we have designed a low-energy oxygen-enriching device for circulating flue gas in cement kilns. Utility Model Content

[0005] The purpose of this invention is to provide a low-energy oxygen enrichment device for circulating flue gas in cement kilns. It has the advantages of multiple nitrogen enrichment conveying components and real-time monitoring of gas conditions. It solves the problems that nitrogen enrichment gas can only be stored through a single structure, and if a component is damaged, the equipment will not be able to operate normally and it does not have the function of analyzing flue gas.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a low-energy oxygen-enriching device for circulating flue gas in a cement kiln, comprising a first conveying valve, an air filter, an air compressor, a second conveying valve, and a kiln. The output end of the air compressor is connected to a dryer, and the discharge end of the dryer is connected to a first connecting pipe. One end of the first connecting pipe is connected to a first regulating valve and a first membrane oxygen-enriching skid-mounted device, and the other end of the first regulating valve is connected to a second membrane oxygen-enriching skid-mounted device. The discharge end of the second conveying valve is connected to a nitrogen-enriched storage tank and a third regulating valve, and the discharge end of the nitrogen-enriched storage tank is connected to a first conveying valve. The discharge end of the first membrane oxygen-enriching skid-mounted device is connected to a second connecting pipe, and the discharge end of the second connecting pipe is connected to an oxygen filter. The discharge end of the oxygen filter is connected to a heat exchanger, and the discharge end of the heat exchanger is connected to a second conveying valve. The discharge end of the second conveying valve is connected to a mixing valve.

[0007] Preferably, the other end of the third regulating valve is connected to a storage tank, the inlet end of the first conveying valve is connected to an air supply device, the outlet end of the storage tank is connected to a connecting valve, the other end of the connecting valve is connected to the first membrane oxygen-enriching skid-mounted device, and the air filter is connected to the first conveying valve and the air compressor respectively.

[0008] Preferably, a first pressure gauge is connected to the surface of the second connecting pipe, and a first alarm is electrically connected to the output end of the second regulating valve.

[0009] Preferably, a first pressure gauge is connected to the surface of the second connecting pipe, and the output end of the first pressure gauge is electrically connected to a first alarm.

[0010] Preferably, the top feed end of the second membrane oxygen-enriching skid-mounted device is connected to a second regulating valve, the exhaust end of the kiln is connected to a flue gas pipe, the other end of the flue gas pipe is connected to a dust collector, the exhaust end of the dust collector is connected to a tank, the exhaust end of the tank is connected to a conveying pump, the exhaust end of the conveying pump is connected to a flue gas filter, the other end of the first conveying valve is connected to the first membrane oxygen-enriching skid-mounted device and the second regulating valve respectively, the exhaust end of the flue gas filter is connected to a mixing valve, and the exhaust end of the mixing valve is connected to the kiln.

[0011] Preferably, a flue gas analyzer is connected to the surface of the flue gas filter outlet end, and the output end of the flue gas analyzer is electrically connected to a remote display screen.

[0012] Preferably, the discharge end of the second transmembrane oxygen-enriched skid-mounted device is connected to a fourth regulating valve, and the discharge end of the fourth regulating valve is connected to the second connecting pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention, through the cooperation of a first transmembrane oxygen-enrichment skid-mounted device, a second transmembrane oxygen-enrichment skid-mounted device, a second regulating valve, a nitrogen-enriched storage tank, a storage tank, a first pressure gauge, a first alarm, a second pressure gauge, a second alarm, a flue gas analyzer, and a remote display screen, can deliver oxygen-enriched gas through multiple components. In use, the nitrogen-enriched storage tank delivers gas through the first delivery valve, and the storage tank can also deliver gas through a connecting valve. This not only improves the efficiency of oxygen-enrichment processing but also allows the system to continue operating normally even if a component fails. Simultaneously, the first and second pressure gauges work in conjunction with the flue gas analyzer to monitor the gas conditions. Attached Figure Description

[0015] Figure 1 This is a system flowchart of this utility model.

[0016] In the diagram: 1. First feed valve; 2. Air filter; 3. Air compressor; 4. Dryer; 5. First connecting pipe; 6. First regulating valve; 7. First membrane oxygen-enriched skid-mounted device; 8. Second membrane oxygen-enriched skid-mounted device; 9. Second regulating valve; 10. First conveying valve; 11. Nitrogen-enriched storage tank; 12. Second feed valve; 13. Third regulating valve; 14. Storage tank; 15. Fourth regulating valve; 16. First pressure gauge; 17. First alarm; 18. Oxygen filter; 19. Heat exchanger; 20. Second conveying valve; 21. Second pressure gauge; 22. Second alarm; 23. Kiln; 24. Flue gas pipe; 25. Dust collector; 26. Tank body; 27. Conveying pump; 28. Flue gas filter; 29. ​​Flue gas analyzer; 30. Remote display screen; 31. Second connecting pipe; 32. Mixing valve; 33. Connecting valve. Detailed Implementation

[0017] Please see Figure 1 A low-energy oxygen-enriching device for circulating flue gas in a cement kiln includes a first conveying valve 1, an air filter 2, an air compressor 3, a second conveying valve 12, and a kiln 23. The output end of the air compressor 3 is connected to a dryer 4. The discharge end of the dryer 4 is connected to a first connecting pipe 5. One end of the first connecting pipe 5 is connected to a first regulating valve 6 and a first membrane oxygen-enriching skid-mounted device 7. The other end of the first regulating valve 6 is connected to a second membrane oxygen-enriching skid-mounted device 8. The discharge end of the second conveying valve 12 is connected to a nitrogen-enriched storage tank 11 and a third regulating valve 13. The discharge end of the nitrogen-enriched storage tank 11 is connected to a first conveying valve 10. The discharge end of the first membrane oxygen-enriching skid-mounted device 7 is connected to a second connecting pipe 31. The discharge end of the second connecting pipe 31 is connected to an oxygen filter 18. The discharge end of the oxygen filter 18 is connected to a heat exchanger 19. The discharge end of the heat exchanger 19 is connected to a second conveying valve 20. The discharge end of the second conveying valve 20 is connected to a mixing valve 32.

[0018] Please see Figure 1 The other end of the third regulating valve 13 is connected to the storage tank 14. The inlet end of the first conveying valve 1 is connected to the air supply equipment. The outlet end of the storage tank 14 is connected to the connecting valve 33. The other end of the connecting valve 33 is connected to the first membrane oxygen enrichment skid-mounted device 7. The air filter 2 is connected to the first conveying valve 1 and the air compressor 3 respectively.

[0019] Please see Figure 1 The surface of the second connecting pipe 31 is connected to the first pressure gauge 16, and the output end of the second regulating valve 9 is electrically connected to the first alarm 17. With the cooperation of the second pressure gauge 21 and the first pressure gauge 16, the gas pressure at different locations can be monitored in real time. With the cooperation of the first alarm 17 and the second alarm 22, alarms can be issued to the staff so that the staff can perform timely maintenance on the equipment.

[0020] Please see Figure 1 A second pressure gauge 21 is connected to the surface of the mixing valve 32, and a second alarm 22 is electrically connected to the output end of the second pressure gauge 21.

[0021] Please see Figure 1 The top feed end of the second membrane oxygen-enriching skid-mounted device 8 is connected to the second regulating valve 9. The exhaust end of the kiln 23 is connected to the flue gas pipe 24. The other end of the flue gas pipe 24 is connected to the dust collector 25. The exhaust end of the dust collector 25 is connected to the tank 26. The exhaust end of the tank 26 is connected to the conveying pump 27. The exhaust end of the conveying pump 27 is connected to the flue gas filter 28. The other end of the first conveying valve 10 is connected to the first membrane oxygen-enriching skid-mounted device 7 and the second regulating valve 9 respectively. The discharge end of the flue gas filter 28 is connected to the mixing valve 32. The exhaust end of the mixing valve 32 is connected to the kiln 23.

[0022] Please see Figure 1 A flue gas analyzer 29 is connected to the surface of the discharge end of the flue gas filter 28, and a remote display screen 30 is electrically connected to the output end of the flue gas analyzer 29.

[0023] Please see Figure 1 The discharge end of the second membrane oxygen enrichment skid-mounted device 8 is connected to the fourth regulating valve 15, and the discharge end of the fourth regulating valve 15 is connected to the second connecting pipe 31. By setting up a remote display screen 30, the treated flue gas data can be viewed so that the staff can check the working status of the equipment.

[0024] During operation, the user opens the first feed valve 1 to allow air to enter the air filter 2 for filtration. Simultaneously, the air compressor 3 delivers air to the dryer 4, which then delivers the air to the first membrane oxygen-enriched skid-mounted device 7. At the same time, the second feed valve 12 delivers nitrogen-enriched gas to the nitrogen-enriched storage tank 11 for storage. If the nitrogen-enriched storage tank 11 malfunctions, the user can open the third regulating valve 13 to allow gas to enter the storage tank 14. During equipment operation, the storage tank 14 or the nitrogen-enriched storage tank... Storage tank 11 can transport gas to the first transmembrane oxygen-enriched skid-mounted device 7 via the first delivery valve 10 and connecting valve 33, enabling it to perform an oxygen-enriched membrane separation process. Within the device, gas is separated into oxygen-enriched gas and nitrogen-enriched gas according to the different permeation rates of the gas components in the compressed air. The resulting oxygen-enriched gas enters the second connecting pipe 31. If the device requires a large amount of oxygen-enriched gas, the user can also open the second regulating valve 9 and the fourth regulating valve 15, allowing the first transmembrane oxygen-enriched skid-mounted device 7 and the second transmembrane oxygen-enriched skid-mounted device 8 to simultaneously perform oxygen enrichment processing. After entering the oxygen filter 18 for filtration, the gas then enters the heat exchanger 19 for heat exchange. After completion, the heat exchanger 19 delivers the gas to the mixing valve 32 via the second delivery valve 20. Meanwhile, when the kiln 23 is operating, it delivers the flue gas to the dust collector 25 via the flue gas pipe 24 for dust removal. The dust collector 25 then delivers the flue gas to the tank 26, and the delivery pump 27 delivers the flue gas from the tank 26 to the flue gas filter 28 for further filtration. After filtration, the flue gas enters the mixing valve 32, where the two gases... The gas is mixed and then enters the kiln 23 through the mixing valve 32. During the gas delivery process, the first pressure gauge 16 and the second pressure gauge 21 will monitor the gas pressure in real time. If the pressure is abnormal, the second pressure gauge 21 or the first pressure gauge 16 will activate the first alarm 17 or the second alarm 22 to remind the staff. The flue gas analyzer 29 will also analyze the flue gas and then send the information to the remote display screen 30 so that the staff can check the working status of the equipment.

[0025] In summary, this low-energy oxygen-enriching device for circulating cement kiln flue gas solves the problem that relying solely on a single structure for storing nitrogen-enriched gas, which would prevent normal operation if any component is damaged, and also lacks the function of analyzing flue gas, through the coordinated use of the first conveying valve 1, air filter 2, air compressor 3, dryer 4, first connecting pipe 5, first regulating valve 6, first membrane oxygen-enriching skid-mounted device 7, second membrane oxygen-enriching skid-mounted device 8, second regulating valve 9, and first conveying valve 10.

Claims

1. A low-energy oxygen-enriching device for circulating flue gas in cement kilns, comprising a first conveying valve (1), an air filter (2), an air compressor (3), a second conveying valve (12), and a kiln (23), characterized in that: The output end of the air compressor (3) is connected to the dryer (4). The discharge end of the dryer (4) is connected to the first connecting pipe (5). One end of the first connecting pipe (5) is connected to the first regulating valve (6) and the first membrane oxygen-enriching skid device (7). The other end of the first regulating valve (6) is connected to the second membrane oxygen-enriching skid device (8). The discharge end of the second conveying valve (12) is connected to the nitrogen-enriched storage tank (11) and the third regulating valve (13). The discharge end of the nitrogen-enriched storage tank (11) is connected to the first conveying valve (10). The discharge end of the first membrane oxygen-enriching skid device (7) is connected to the second connecting pipe (31). The discharge end of the second connecting pipe (31) is connected to the oxygen filter (18). The discharge end of the oxygen filter (18) is connected to the heat exchanger (19). The discharge end of the heat exchanger (19) is connected to the second conveying valve (20). The discharge end of the second conveying valve (20) is connected to the mixing valve (32).

2. The low-energy oxygen-enriching device for circulating flue gas in cement kilns according to claim 1, characterized in that: The other end of the third regulating valve (13) is connected to the storage tank (14), the feed end of the first conveying valve (1) is connected to the air supply equipment, the air outlet end of the storage tank (14) is connected to the connecting valve (33), the other end of the connecting valve (33) is connected to the first transmembrane oxygen enrichment skid device (7), and the air filter (2) is connected to the first conveying valve (1) and the air compressor (3) respectively.

3. The low-energy oxygen-enriching device for circulating cement kiln flue gas according to claim 1, characterized in that: The surface of the second connecting pipe (31) is connected to a first pressure gauge (16), and the output end of the first pressure gauge (16) is electrically connected to a first alarm (17).

4. The low-energy oxygen-enriching device for circulating flue gas in cement kilns according to claim 1, characterized in that: The surface of the mixing valve (32) is connected to a second pressure gauge (21), and the output end of the second pressure gauge (21) is electrically connected to a second alarm (22).

5. The low-energy oxygen-enriching device for circulating flue gas in cement kilns according to claim 1, characterized in that: The top feed end of the second transmembrane oxygen-enriched skid-mounted device (8) is connected to the second regulating valve (9). The exhaust end of the kiln (23) is connected to the flue gas pipe (24). The other end of the flue gas pipe (24) is connected to the dust collector (25). The exhaust end of the dust collector (25) is connected to the tank (26). The exhaust end of the tank (26) is connected to the conveying pump (27). The exhaust end of the conveying pump (27) is connected to the flue gas filter (28). The other end of the first conveying valve (10) is connected to the first transmembrane oxygen-enriched skid-mounted device (7) and the second regulating valve (9). The exhaust end of the flue gas filter (28) is connected to the mixing valve (32). The exhaust end of the mixing valve (32) is connected to the kiln (23).

6. The low-energy oxygen-enriching device for circulating flue gas in cement kilns according to claim 5, characterized in that: A flue gas analyzer (29) is connected to the surface of the discharge end of the flue gas filter (28), and a remote display screen (30) is electrically connected to the output end of the flue gas analyzer (29).

7. The low-energy oxygen-enriching device for circulating flue gas in cement kilns according to claim 1, characterized in that: The discharge end of the second transmembrane oxygen-enriched skid-mounted device (8) is connected to a fourth regulating valve (15), and the discharge end of the fourth regulating valve (15) is connected to the second connecting pipe (31).

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