Yellow phosphorus flue gas sulfur dioxide removal system based on calcium method and dry method desulfurization technology

Abstract

The utility model relates to the technical field of dry desulfurization, in particular to a yellow phosphorus flue gas sulfur dioxide removal system based on a calcium dry desulfurization technology, which comprises a desulfurizer bin, a discharge port of the desulfurizer bin is communicated with a first delivery pipe, the bottom end of the first delivery pipe is communicated with a three-way pipe, and the bottom end of the three-way pipe is communicated with a second delivery pipe. And the left side of the three-way pipe communicates with a first fan. Through cooperation of the filter box, the filter screen, the electric push rod and the cleaning brush, the pre-filtering function is achieved, after flue gas enters the filter box, the filter screen filters large impurities contained in the flue gas, then the electric push rod is controlled to work through the external controller, the output end of the electric push rod drives the cleaning brush to move downwards, and the flue gas is filtered out through the filter screen. The cleaning brush is used for brushing and sweeping impurities adhered to the surface of the filter screen, so that the pre-filtering work of the flue gas is completed, the flue gas can be fully mixed with a desulfurizing agent, and meanwhile, the dust remover cannot be blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of dry desulfurization, in particular to a yellow phosphorus flue gas sulfur dioxide removal system based on a calcium dry desulfurization technology. Background Art

[0002] Dry desulfurization, also known as dry flue gas desulfurization, refers to the use of powdered or granular absorbents, adsorbents or catalysts to remove sulfide-containing gases from flue gas. When desulfurizing yellow phosphorus flue gas, a calcium dry desulfurization system is required.

[0003] After searching, the announcement number is CN219615265U, and the name is a utility model of a calcium-based dry flue gas desulfurization process system, which includes a desulfurizer bin, a manual gate valve, a bellows expansion joint, an escape chamber, a feeder, an acceleration chamber, a Roots blower, a desulfurizer delivery pipeline, an original flue gas pipeline, a dust removal system, a clean flue gas pipeline, an induced draft fan and an exhaust pipe. Through research and analysis, it is found that although the desulfurization ash in the flue gas can be purified and collected by the dust removal system during use, and the flue gas that meets the desulfurization and dust removal standards is transported to the exhaust pipe through the clean flue gas pipeline by the induced draft fan for discharge, etc., there are still the following disadvantages to a certain extent.

[0004] For example, without the pre-filtration function, the above-mentioned desulfurization system cannot pre-filter the larger particles contained in the flue gas during use, which makes it easy for the particles to combine with the desulfurizer, thereby affecting the desulfurization effect of the flue gas. At the same time, larger particles are easy to be blocked inside the dust removal system, resulting in reduced ventilation and thus reducing the desulfurization efficiency. In order to solve the above technical problems, we have designed a yellow phosphorus flue gas sulfur dioxide removal system based on calcium dry desulfurization technology. Utility Model Content

[0005] The purpose of the utility model is to provide a yellow phosphorus flue gas sulfur dioxide removal system based on calcium dry desulfurization technology, which has the advantages of pre-filtration function and heat recovery function, and solves the problem that the existing desulfurization system cannot pre-filter the larger impurities contained in the flue gas during use, and cannot recycle the flue gas heat.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a yellow phosphorus flue gas sulfur dioxide removal system based on calcium dry desulfurization technology, comprising a desulfurizer silo, the discharge port of the desulfurizer silo is connected to a first conveying pipe, the bottom end of the first conveying pipe is connected to a three-way pipe, the left side of the three-way pipe is connected to a first fan, the right side of the three-way pipe is connected to a second conveying pipe, the right end of the second conveying pipe is connected to a mixing bin, the left side of the bottom of the mixing bin is connected to a smoke pipe, the left end of the smoke pipe is connected to a filtering mechanism, the left side of the filtering mechanism is connected to a second fan, the right side of the bottom of the mixing bin is connected to a first air supply pipe, the top end of the first air supply pipe is connected to a dust collector, the air outlet pipe of the dust collector is connected to the second air supply pipe, the right end of the second air supply pipe is connected to a distribution bin, the bottom of the distribution bin is connected to an air supply pipe, the bottom end of the air supply pipe is connected to a heat exchange mechanism, and the top of the distribution bin is connected to a first exhaust pipe.

[0007] Preferably, the filtering mechanism includes a filter box, the right side of the filter box is connected to the smoke duct, the left side of the filter box is connected to the air outlet duct of the second fan, the inner cavity of the filter box is movably connected to the filter screen via a slide rail, the top of the filter box is connected to an electric push rod via bolts, the output end of the electric push rod passes through the inner cavity of the filter box and is fixedly connected to a cleaning brush, the right side of the cleaning brush is in contact with the filter screen, and the bottom of the inner cavity of the filter box is riveted with a guide plate.

[0008] Preferably, the heat exchange mechanism includes a heat exchange box, the top of the heat exchange box is connected to the gas pipe, the inner cavity of the heat exchange box is fixedly connected with a heat exchange pipe, the top of the heat exchange pipe extends to the inner cavity of the gas pipe, the right end of the heat exchange pipe is connected to a second exhaust pipe, the bottom of the heat exchange box is fixedly connected with a first temperature sensor, and the top and bottom of the left side of the heat exchange box are respectively connected to a water filling valve and a drain valve.

[0009] Preferably, the left side of the bottom of the filter box is connected with a round pipe, the bottom thread sleeve of the round pipe is provided with a pipe cap, and the front side of the filter box is connected with a sealing plate by bolts.

[0010] Preferably, a first electric valve is fixedly installed on the surface of the first delivery pipe, a second electric valve is fixedly installed on the surface of the first exhaust pipe, and a third electric valve is fixedly installed on the top of the surface of the gas delivery pipe.

[0011] Preferably, a second temperature sensor is fixedly connected through the left side of the bottom of the distribution bin, and an ash discharge valve is fixedly connected to the bottom of the dust collector.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1. The utility model has the advantage of pre-filtration function through the cooperation of the filter box, the filter screen, the electric push rod and the cleaning brush. After the flue gas enters the filter box, the filter screen filters the larger impurities contained in the flue gas, and then controls the electric push rod to work through the external controller. The output end of the electric push rod drives the cleaning brush to move downward, and the cleaning brush sweeps the impurities adhered to the surface of the filter screen, thereby completing the pre-filtration of the flue gas, so that it can be fully mixed with the desulfurizer, and at the same time will not cause the dust collector to be blocked.

[0014] 2. The utility model has the advantage of heat recovery and utilization function through the cooperation of the heat exchange box, the heat exchange tube, the second exhaust pipe and the first temperature sensor. The flue gas with higher temperature enters the inner cavity of the heat exchange tube through the gas transmission pipe, and then adds a proper amount of cold water to the inner cavity of the heat exchange box through the water adding valve. The heat exchange tube heats the cold water, and the first temperature sensor detects the water temperature. When the water temperature is heated to a suitable temperature, it is discharged through the drain valve, thereby making full use of the flue gas heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the utility model;

[0016] Figure 2 This is a cross-sectional schematic diagram of the filter mechanism of the utility model;

[0017] Figure 3 It is a cross-sectional schematic diagram of the heat exchange mechanism of the utility model.

[0018] In the figure: 1. desulfurizer silo; 2. first conveying pipe; 3. three-way pipe; 4. first fan; 5. second conveying pipe; 6. mixing bin; 7. smoke pipe; 8. filtering mechanism; 9. second fan; 10. first air supply pipe; 11. dust collector; 12. second air supply pipe; 13. distribution bin; 14. air delivery pipe; 15. heat exchange mechanism; 16. first exhaust pipe; 17. filter box; 18. filter screen; 19. electric push rod; 20. cleaning brush; 21. heat exchange box; 22. heat exchange pipe; 23. second exhaust pipe; 24. first temperature sensor; 25. first electric valve; 26. second electric valve; 27. third electric valve; 28. second temperature sensor. DETAILED DESCRIPTION

[0019] See also Figure 1-Figure 3A yellow phosphorus flue gas sulfur dioxide removal system based on calcium dry desulfurization technology includes a desulfurizer silo 1, the discharge port of the desulfurizer silo 1 is connected to a first conveying pipe 2, the bottom end of the first conveying pipe 2 is connected to a three-way pipe 3, the left side of the three-way pipe 3 is connected to a first fan 4, the right side of the three-way pipe 3 is connected to a second conveying pipe 5, the right end of the second conveying pipe 5 is connected to a mixing bin 6, the left side of the bottom of the mixing bin 6 is connected to a smoke pipe 7, the left end of the smoke pipe 7 is connected to a filtering mechanism 8, the left side of the filtering mechanism 8 is connected to a second fan 9, the right side of the bottom of the mixing bin 6 is connected to a first air supply pipe 10, the top of the first air supply pipe 10 is connected to a dust collector 11, the air outlet pipe of the dust collector 11 is connected to a second air supply pipe 12, the right end of the second air supply pipe 12 is connected to a distribution bin 13, the bottom of the distribution bin 13 is connected to an air delivery pipe 14, the bottom end of the air delivery pipe 14 is connected to a heat exchange mechanism 15, and the top of the distribution bin 13 is connected to a first exhaust pipe 16.

[0020] See also Figure 2 The filtering mechanism 8 includes a filter box 17, the right side of the filter box 17 is connected to the smoke pipe 7, the left side of the filter box 17 is connected to the air outlet pipe of the second fan 9, the inner cavity of the filter box 17 is movably connected with a filter screen 18 through a slide rail, the top of the filter box 17 is connected with an electric push rod 19 through bolts, the output end of the electric push rod 19 penetrates into the inner cavity of the filter box 17 and is fixedly connected with a cleaning brush 20, the right side of the cleaning brush 20 is in contact with the filter screen 18, and a guide plate is riveted on the bottom of the inner cavity of the filter box 17. By setting the guide plate, impurities can be diverted, making them more efficient when discharged.

[0021] See also Figure 3 The heat exchange mechanism 15 includes a heat exchange box 21, the top of the heat exchange box 21 is connected to the gas pipe 14, the inner cavity of the heat exchange box 21 is fixedly connected with a heat exchange pipe 22, the top of the heat exchange pipe 22 extends to the inner cavity of the gas pipe 14, the right end of the heat exchange pipe 22 is connected with a second exhaust pipe 23, and the bottom of the heat exchange box 21 is fixedly connected with a first temperature sensor 24, and the top and bottom of the left side of the heat exchange box 21 are respectively connected with a water filling valve and a drain valve. By setting the water filling valve and the drain valve, it is convenient to replace the water in the inner cavity of the heat exchange box 21, so that the heat can be continuously recycled.

[0022] See also Figure 1 The left side of the bottom of the filter box 17 is connected with a round tube, and a pipe cap is provided on the threaded sleeve at the bottom of the round tube. The front side of the filter box 17 is connected with a sealing plate by bolts. By setting the round tube, impurities can be discharged to prevent impurities from remaining in the inner cavity of the filter box 17.

[0023] See also Figure 1A first electric valve 25 is fixedly installed on the surface of the first conveying pipe 2, a second electric valve 26 is fixedly installed on the surface of the first exhaust pipe 16, and a third electric valve 27 is fixedly installed on the top of the surface of the gas pipe 14. By setting the first electric valve 25, the material discharge amount can be controlled, thereby facilitating the subsequent gas-powder mixing work.

[0024] See also Figure 1 A second temperature sensor 28 is fixedly connected to the left side of the bottom of the distribution bin 13, and an ash discharge valve is fixedly connected to the bottom of the dust collector 11. By setting the second temperature sensor 28, the heat of the flue gas can be detected to determine whether heat recovery is needed.

[0025] When in use, the second fan 9 conveys the flue gas to the inner cavity of the filter box 17, and the filter 18 filters the larger impurities contained in the flue gas. The flue gas after filtering enters the inner cavity of the mixing bin 6 through the smoke pipe 7, and then the first electric valve 25 is controlled to open by the external controller. The desulfurizer in the inner cavity of the desulfurizer silo 1 falls into the inner cavity of the three-way pipe 3 under the action of the first conveying pipe 2, and then the first fan 4 is controlled to operate by the external controller. The first fan 4 blows the desulfurizer in the inner cavity of the three-way pipe 3 to the inner cavity of the mixing bin 6, so as to mix the desulfurizer and the flue gas. The mixed gas is conveyed to the inside of the dust collector 11 through the first air supply pipe 10. The dust collector 11 filters the dust contained in the flue gas, and the desulfurizer is finally discharged to the bottom of the dust collector 11 through the ash discharge valve. The purified flue gas passes through the second air supply pipe 10. The second air supply pipe 12 is transported to the distribution bin 13, and the second temperature sensor 28 detects the flue gas temperature. When the flue gas heat has recovery value, the external controller controls the second electric valve 26 to close, and the third electric valve 27 of the controller is opened. The high-temperature flue gas is transported to the inner cavity of the heat exchange tube 22 through the air supply pipe 14, and an appropriate amount of water is added to the inner cavity of the heat exchange box 21 through the water adding valve. The heat exchange tube 22 heats the water. Finally, the flue gas after heat exchange is discharged to the outside of the heat exchange box 21 through the second exhaust pipe 23. When the filter 18 needs to be cleaned, the pipe cap is opened, and the electric push rod 19 is controlled by the external controller to work. The output end of the electric push rod 19 drives the cleaning brush 20 to work. The cleaning brush 20 cleans the surface of the filter 18, and the cleaned impurities are discharged to the bottom of the filter box 17 through the circular pipe.

[0026] To sum up: the yellow phosphorus flue gas sulfur dioxide removal system based on calcium dry desulfurization technology, through the cooperation of the filter box 17, the filter screen 18, the electric push rod 19, the cleaning brush 20, the heat exchange box 21, the heat exchange tube 22, the second exhaust pipe 23 and the first temperature sensor 24, solves the problem that the existing desulfurization system cannot pre-filter the larger impurities contained in the flue gas during use, and cannot recycle the heat of the flue gas.

Claims

1. A yellow phosphorus flue gas sulfur dioxide removal system based on calcium dry desulfurization technology, comprising a desulfurizer silo (1), characterized in that: The discharge port of the desulfurizing agent silo (1) is connected to a first conveying pipe (2), the bottom end of the first conveying pipe (2) is connected to a three-way pipe (3), the left side of the three-way pipe (3) is connected to a first fan (4), the right side of the three-way pipe (3) is connected to a second conveying pipe (5), the right end of the second conveying pipe (5) is connected to a mixing bin (6), the left side of the bottom of the mixing bin (6) is connected to a smoke pipe (7), the left end of the smoke pipe (7) is connected to a filtering mechanism (8), and the left side of the filtering mechanism (8) is connected to a second fan (4). The mixing chamber (9) is provided with a first air supply pipe (10) on the right side of the bottom thereof, a dust collector (11) on the top of the first air supply pipe (10), an air outlet pipe of the dust collector (11) on the right side thereof, a distribution chamber (13) on the right side thereof, an air delivery pipe (14) on the bottom of the distribution chamber (13), a heat exchange mechanism (15) on the bottom of the air delivery pipe (14), and a first exhaust pipe (16) on the top thereof.

2. A yellow phosphorus flue gas sulfur dioxide removal system based on calcium dry desulfurization technology according to claim 1, characterized in that: The filtering mechanism (8) comprises a filter box (17), the right side of the filter box (17) being connected to the smoke pipe (7), the left side of the filter box (17) being connected to the air outlet pipe of the second fan (9), the inner cavity of the filter box (17) being movably connected to a filter screen (18) via a slide rail, the top of the filter box (17) being connected to an electric push rod (19) via bolts, the output end of the electric push rod (19) penetrating into the inner cavity of the filter box (17) and being fixedly connected to a cleaning brush (20), the right side of the cleaning brush (20) being in contact with the filter screen (18), and the bottom of the inner cavity of the filter box (17) being riveted with a guide plate.

3. The yellow phosphorus flue gas sulfur dioxide removal system based on calcium dry desulfurization technology according to claim 1 is characterized in that: The heat exchange mechanism (15) comprises a heat exchange box (21), the top of the heat exchange box (21) is connected to the gas supply pipe (14), the inner cavity of the heat exchange box (21) is fixedly connected to a heat exchange pipe (22), the top of the heat exchange pipe (22) extends to the inner cavity of the gas supply pipe (14), the right end of the heat exchange pipe (22) is connected to a second exhaust pipe (23), the bottom of the heat exchange box (21) is penetrated and fixedly connected to a first temperature sensor (24), and the top and bottom of the left side of the heat exchange box (21) are respectively connected to a water filling valve and a drain valve.

4. A yellow phosphorus flue gas sulfur dioxide removal system based on calcium dry desulfurization technology according to claim 2, characterized in that: The left side of the bottom of the filter box (17) is connected to a round pipe, a pipe cap is provided on the threaded sleeve at the bottom of the round pipe, and a sealing plate is connected to the front side of the filter box (17) via bolts.

5. The yellow phosphorus flue gas sulfur dioxide removal system based on calcium dry desulfurization technology according to claim 1 is characterized in that: A first electric valve (25) is fixedly mounted on the surface of the first delivery pipe (2), a second electric valve (26) is fixedly mounted on the surface of the first exhaust pipe (16), and a third electric valve (27) is fixedly mounted on the top of the surface of the gas delivery pipe (14).

6. The yellow phosphorus flue gas sulfur dioxide removal system based on calcium dry desulfurization technology according to claim 1 is characterized by: A second temperature sensor (28) is fixedly connected to the left side of the bottom of the distribution bin (13), and an ash discharge valve is fixedly connected to the bottom of the dust collector (11).

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