Desulfurization and dust removal device for fire coal of thermal power plant

Abstract

The utility model relates to the technical field of flue gas treatment, in particular to a desulfurization and dust removal device for fire coal of a thermal power plant, which can recycle heat, reduce the temperature of flue gas, avoid damage to the device, discharge precipitated impurities and prolong the service life. Comprising a base and a dust removal cylinder fixedly connected to the top end of the base. The heat exchange mechanism is installed on the left portion of the top end of the base and comprises a heat exchange barrel, a circulating flue, a smoke inlet pipe, an output pipe, a liquid outlet pipe and a liquid inlet pipe, the dust removal mechanism is installed in the dust removal barrel, and the output end of the heat exchange mechanism communicates with the dust removal mechanism; the discharging mechanism is installed at the bottom end in the dust removal cylinder, the desulfurization mechanism is installed on the right portion of the top end of the base, and the input end of the desulfurization mechanism is connected with the output end of the dust removal cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment, in particular to a coal-fired desulfurization and dust removal device for a thermal power plant. Background Art

[0002] A thermal power plant is referred to as a thermal power plant. It is a factory that uses combustibles (such as coal) as fuel to produce electricity. Its basic production process is: when the fuel is burned, it heats water to generate steam, converting the chemical energy of the fuel into thermal energy, and the steam pressure drives the turbine to rotate, converting the thermal energy into mechanical energy, and then the turbine drives the generator to rotate, converting the mechanical energy into electrical energy. However, when the thermal power plant generates electricity, a large amount of exhaust gas will be generated. If it is directly discharged, it will cause serious environmental pollution. A thermal power plant flue gas desulfurization device proposed in the prior art publication number CN215782527U includes a desulfurization device outer shell, a first wet filter, a second wet filter and a water bath filter. A thermal power plant flue gas access pipe is arranged on one side of the lower section of the desulfurization device outer shell, the first wet filter is arranged in the lower section of the desulfurization device outer shell, the second wet filter is arranged in the upper section of the desulfurization device outer shell, and the water bath filter is arranged in the middle section of the desulfurization device outer shell. However, in actual use, when treating the emitted flue gas, the flue gas contains a large amount of dust particles. Directly introducing the flue gas into the device for treatment will easily lead to the accumulation of dust and dirt inside the device, which is difficult to treat and will accelerate the service life of the treatment liquid inside the device. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a coal-fired desulfurization and dust removal device for a thermal power plant which can recycle heat, reduce flue gas temperature, avoid damage to the device, discharge precipitated impurities, and increase service life.

[0004] The utility model discloses a coal-fired desulfurization and dust removal device for a thermal power plant, comprising a base and a dust removal cylinder, wherein the dust removal cylinder is fixedly connected to the top end of the base; further comprising a heat exchange mechanism, a dust removal mechanism, a sewage discharge mechanism and a desulfurization mechanism, wherein the heat exchange mechanism is installed at the left portion of the top end of the base, the dust removal mechanism is installed inside the dust removal cylinder, the output end of the heat exchange mechanism is connected with the dust removal mechanism, the sewage discharge mechanism is installed at the bottom end of the dust removal cylinder, the desulfurization mechanism is installed at the right portion of the top end of the base, and the input end of the desulfurization mechanism is connected with the output end of the dust removal cylinder; during use, the flue gas is input into the heat exchange mechanism, the heat is recycled and utilized, the flue gas temperature is reduced, and damage to the device is avoided, and then the flue gas is input into the dust removal mechanism to adsorb and absorb the floating dust and particles in the exhaust gas, the precipitated impurities can be discharged through the sewage discharge mechanism, and the treated flue gas is input into the desulfurization mechanism for filtration and desulfurization treatment, thereby reducing pollution to the atmosphere.

[0005] Preferably, the heat exchange mechanism includes a heat exchange cylinder, a circulating flue, a smoke inlet pipe, an output pipe, a liquid outlet pipe and a liquid inlet pipe. The heat exchange cylinder is fixedly mounted on the left top portion of the base. A circulating flue is installed inside the heat exchange cylinder. The input end of the circulating flue is connected to the smoke inlet pipe, which is located outside the heat exchange cylinder. The output end of the circulating flue is connected to the output pipe, which extends into the inner bottom end of the dust removal cylinder. The liquid outlet pipe and the liquid inlet pipe are fixedly mounted on the top end of the heat exchange cylinder, and the bottom of the liquid inlet pipe is input into the inner bottom end of the heat exchange cylinder. Circulating water is input into the heat exchange cylinder through the liquid outlet pipe and the liquid inlet pipe. During use, the flue gas is input into the circulating flue through the smoke inlet pipe. The circulating flue increases the contact area between the flue gas and the circulating water, thereby recycling heat, reducing the flue gas temperature, avoiding damage to the device, and increasing the service life.

[0006] Preferably, the dust removal mechanism includes an activated carbon filter layer, a submersible pump, a water pipe, a nozzle and multiple flushing nozzles. Water is provided at the lower end of the interior of the dust collection cylinder, and the output end of the output pipe extends into the water. The activated carbon filter layer is fixedly installed on the upper side wall of the dust collection cylinder, and the submersible pump is fixedly installed inside the dust collection cylinder. The output end of the submersible pump is connected to the water pipe, and the output end of the water pipe passes through the side wall of the dust collection cylinder and is located on the upper part of the activated carbon filter layer. The output end of the water pipe is connected to the nozzle, and multiple flushing nozzles are installed at the bottom of the nozzle; the cooled flue gas is input into the water through the output pipe, and the floating dust and particles in the exhaust gas are adsorbed and absorbed. At the same time, the exhaust gas is further adsorbed and filtered by the activated carbon filter layer. Water is extracted by the submersible pump, input into the nozzle through the water pipe, and sprayed to the activated carbon filter layer through the flushing nozzle, so that the activated carbon filter layer can be cleaned for repeated use.

[0007] Preferably, the sewage discharge mechanism includes a driving motor, a rotating shaft, a spiral conveying blade and a sewage discharge pipe. The driving motor is fixedly mounted on the lower end of the rear side wall of the dust collector. The output end of the driving motor is fixedly connected to the rotating shaft. The rotating shaft is rotatably mounted inside the dust collector. The spiral conveying blades are fixedly mounted on the outer wall of the rotating shaft. The sewage discharge pipe is fixedly connected to the front end side wall of the dust collector. The sewage discharge pipe is provided with a sewage valve. The driving motor is started to drive the rotating shaft to rotate. The rotating shaft drives the spiral conveying blades to rotate to stir the floating dust particles settled at the bottom of the dust collector. The sewage discharge valve is opened, and the impurities can be discharged through the sewage discharge pipe to ensure the discharge efficiency.

[0008] Preferably, the desulfurization mechanism includes a desulfurization tank, a suction pump, an ammonia water inlet pipe, an annular water spray pipe, multiple atomizing nozzles, a funnel-shaped baffle and a waste liquid pipe. The desulfurization tank is fixedly installed on the top right part of the base, the suction pump is fixedly connected to the right side wall of the desulfurization tank, an input pipe is provided at the input end of the suction pump, and the output end of the suction pump is connected to the ammonia water inlet pipe, and the output end of the ammonia water inlet pipe is connected to the annular water spray pipe, and multiple atomizing nozzles are evenly installed at the bottom of the annular water spray pipe. The funnel-shaped baffle is fixedly installed at the lower end of the interior of the desulfurization tank, and the lower part of the left side wall of the desulfurization tank is connected to the waste liquid pipe; after the flue gas is introduced into the desulfurization tank, the ammonia water is drawn by the suction pump and input into the ammonia water inlet pipe, and then input into the annular water spray pipe, and sprayed out through the atomizing nozzle so that the exhaust gas can contact with the ammonia water droplets during the rising process, thereby improving the absorption efficiency of the exhaust gas sulfide, and then falls above the funnel-shaped baffle and is discharged through the waste liquid pipe.

[0009] Preferably, it also includes a smoke duct, a fan and a smoke exhaust duct, the input end of the smoke duct is connected to the top output end of the dust removal tube, the output end of the smoke duct passes through the side wall of the desulfurization tank and is connected to the interior of the desulfurization tank, the fan is installed on the smoke duct, and the smoke exhaust duct is fixedly connected to the top of the desulfurization tank; the fan is started to extract the flue gas preliminarily treated in the dust removal tube through the smoke duct and input it into the desulfurization tank, and the flue gas after desulfurization treatment is discharged through the smoke exhaust duct.

[0010] Preferably, it also includes a second activated carbon filter layer and a water absorption layer, which are fixedly installed on the inner wall of the desulfurization tank above the annular water spray pipe; the flue gas is filtered and adsorbed again by the second activated carbon filter layer, and the water absorption layer removes excess moisture and discharges the harmless gas through the exhaust pipe on the top of the desulfurization tank.

[0011] Compared with the prior art, the utility model has the following beneficial effects: during use, the flue gas is input into the heat exchange mechanism, the heat is recycled and utilized, the flue gas temperature is reduced, and damage to the device is avoided; then the flue gas is input into the dust removal mechanism to adsorb and absorb the floating dust and particles in the exhaust gas, the precipitated impurities can be discharged through the sewage discharge mechanism, and the treated flue gas is input into the desulfurization mechanism for filtration and desulfurization treatment, thereby reducing pollution to the atmosphere. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is a front structural schematic diagram of the utility model;

[0014] Figure 3 It is a front cross-sectional structural schematic diagram of the utility model;

[0015] Figure 4 It is a right side cross-sectional structural schematic diagram of the utility model;

[0016] Figure 5 This is a schematic diagram of the internal structure of the desulfurization tank of the utility model;

[0017] Markings in the attached figure: 1. base; 2. dust removal cylinder; 3. heat exchange cylinder; 4. circulating flue; 5. smoke inlet pipe; 6. output pipe; 7. liquid outlet pipe; 8. liquid inlet pipe; 9. activated carbon filter layer; 10. submersible pump; 11. water pipe; 12. nozzle; 13. flushing nozzle; 14. drive motor; 15. rotating shaft; 16. spiral conveying blade; 17. sewage pipe; 18. desulfurization tank; 19. liquid suction pump; 20. ammonia water inlet pipe; 21. annular water spray pipe; 22. atomizing nozzle; 23. funnel-shaped baffle; 24. waste liquid pipe; 25. smoke pipe; 26. fan; 27. smoke exhaust pipe; 28. second activated carbon filter layer; 29. ​​water absorption layer. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive. Example 1

[0019] like Figure 1 , Figure 3 and Figure 5As shown, the dust removal cylinder 2 is fixedly connected to the top of the base 1, the heat exchange cylinder 3 is fixedly installed on the left part of the top of the base 1, a circulating flue 4 is installed inside the heat exchange cylinder 3, the input end of the circulating flue 4 is connected to the smoke inlet pipe 5, the smoke inlet pipe 5 is located outside the heat exchange cylinder 3, the output end of the circulating flue 4 is connected to the output pipe 6, the output pipe 6 extends into the bottom end of the interior of the dust removal cylinder 2, the liquid outlet pipe 7 and the liquid inlet pipe 8 are fixedly installed at the top of the heat exchange cylinder 3, the bottom of the liquid inlet pipe 8 is input into the bottom end of the interior of the heat exchange cylinder 3, water is provided at the lower end of the interior of the dust removal cylinder 2, the output end of the output pipe 6 extends into the water, the activated carbon filter layer 9 is fixedly installed on the upper side wall of the dust removal cylinder 2, the submersible pump 10 is fixedly installed inside the dust removal cylinder 2, the output end of the submersible pump 10 is connected to the water delivery pipe 11, the output end of the water delivery pipe 11 passes through the side wall of the dust removal cylinder 2 and is located at the upper part of the activated carbon filter layer 9, and the output end of the water delivery pipe 11 passes through the side wall of the dust removal cylinder 2 and is located at the upper part of the activated carbon filter layer 9, and the output end of the water delivery pipe 11 passes through the side wall of the dust removal cylinder 2 and is located at the upper part of the activated carbon filter layer 9. The output end of the water pipe 11 is connected to a nozzle 12, and a plurality of flushing nozzles 13 are installed at the bottom of the nozzle 12. The desulfurization tank 18 is fixedly installed at the top right part of the base 1, and the suction pump 19 is fixedly connected to the right side wall of the desulfurization tank 18. The input end of the suction pump 19 is provided with an input pipe, and the output end of the suction pump 19 is connected to an ammonia water inlet pipe 20, and the output end of the ammonia water inlet pipe 20 is connected to an annular water spray pipe 21, and a plurality of atomizing nozzles 22 are evenly installed at the bottom of the annular water spray pipe 21. A funnel-shaped baffle 23 is fixedly installed at the lower end of the interior of the desulfurization tank 18, and a waste liquid pipe 24 is connected to the lower part of the left side wall of the desulfurization tank 18. The input end of the smoke pipe 25 is connected to the top output end of the dust removal cylinder 2, and the output end of the smoke pipe 25 passes through the side wall of the desulfurization tank 18 and communicates with the interior thereof. A fan 26 is installed on the smoke pipe 25, and a smoke exhaust pipe 27 is fixedly connected to the top of the desulfurization tank 18;

[0020] Circulating water is input into the heat exchange cylinder 3 through the liquid outlet pipe 7 and the liquid inlet pipe 8. During use, the flue gas is input into the circulating flue 4 through the flue inlet pipe 5. The circulating flue 4 increases the contact area between the flue gas and the circulating water, recycles the heat, reduces the flue gas temperature, avoids damage to the device, and increases the service life. The cooled flue gas is input into the water through the output pipe 6 to adsorb and absorb the floating dust and particles in the exhaust gas. At the same time, the exhaust gas is further adsorbed and filtered through the activated carbon filter layer 9. The water is extracted by the submersible pump 10 and input into the nozzle 12 through the water pipe 11. The activated carbon is flushed through the nozzle 13. The carbon filter layer 9 is sprayed out, which can clean the activated carbon filter layer 9 for repeated use. The fan 26 is started to extract the flue gas preliminarily treated in the dust removal tube 2 through the smoke pipe 25 and input it into the desulfurization tank 18. After the flue gas is introduced into the desulfurization tank 18, the ammonia water is extracted by the suction pump 19 and input into the ammonia water inlet pipe 20, and then input into the annular water spray pipe 21, and sprayed out through the atomizing nozzle 22 so that the exhaust gas can contact with the ammonia water droplets during the rising process, thereby improving the absorption efficiency of the sulfide in the exhaust gas, and then falls above the funnel-shaped baffle 23 and is discharged through the waste liquid pipe 24. The flue gas after desulfurization treatment is discharged through the exhaust pipe 27. Example 2

[0021] like Figures 2 to 4 As shown, on the basis of the first embodiment, it also includes a driving motor 14 fixedly mounted on the lower end of the rear side wall of the dust removal cylinder 2, the output end of the driving motor 14 is fixedly connected to a rotating shaft 15, the rotating shaft 15 is rotatably mounted inside the dust removal cylinder 2, a spiral conveying blade 16 is fixedly mounted on the outer wall of the rotating shaft 15, a sewage pipe 17 is fixedly connected to the front end side wall of the dust removal cylinder 2, a sewage pipe 17 is provided with a sewage valve, and a second activated carbon filter layer 28 and a water absorption layer 29 are fixedly mounted on the inner wall of the desulfurization tank 18 above the annular water spray pipe 21;

[0022] Start the drive motor 14 to drive the rotating shaft 15 to rotate, and the rotating shaft 15 drives the spiral conveying blade 16 to rotate to stir the floating and sinking particles settled at the bottom of the dust removal tube 2, open the drain valve, and discharge the impurities through the drain pipe 17 to ensure the discharge efficiency, and filter and adsorb the flue gas again through the second activated carbon filter layer 28, and the water absorption layer 29 removes excess moisture and discharges the harmless gas through the exhaust pipe 27 on the top of the desulfurization tank 18.

[0023] like Figures 1 to 5 As shown, the utility model is a coal-fired desulfurization and dust removal device for a thermal power plant. When it is working, circulating water is input into the heat exchange cylinder 3 through the liquid outlet pipe 7 and the liquid inlet pipe 8. During use, the flue gas is input into the circulating flue 4 through the flue inlet pipe 5. The circulating flue 4 increases the contact area between the flue gas and the circulating water, recycles the heat, and reduces the flue gas temperature. The cooled flue gas is input into the water through the output pipe 6, and the floating dust and particles in the exhaust gas are adsorbed and absorbed. At the same time, the exhaust gas is further adsorbed and filtered through the activated carbon filter layer 9. Water is extracted by a submersible pump 10, input into the nozzle 12 through the water pipe 11, and sprayed to the activated carbon filter layer 9 through the flushing nozzle 13, so that the activated carbon filter layer 9 can be cleaned to achieve the purpose of repeated use. The fan 26 is started to blow the preliminarily treated dust in the dust removal cylinder 2 through the smoke pipe 25. The flue gas is extracted and input into the desulfurization tank 18. After the flue gas is introduced into the desulfurization tank 18, the ammonia water is extracted by the suction pump 19 and input into the ammonia water inlet pipe 20, and then input into the annular water spray pipe 21, and sprayed out through the atomizing nozzle 22 so that the exhaust gas can contact with the ammonia water droplets during the rising process, thereby improving the absorption efficiency of the exhaust gas sulfide, and then falls above the funnel-shaped baffle 23, and is discharged through the waste liquid pipe 24. The flue gas is filtered and adsorbed again by the second activated carbon filter layer 28, and the water absorption layer 29 removes excess water and discharges the harmless gas through the exhaust pipe 27 on the top of the desulfurization tank 18. The drive motor 14 is started to drive the rotating shaft 15 to rotate, and the rotating shaft 15 drives the spiral conveying blade 16 to rotate to stir the floating and sinking particles precipitated at the bottom of the dust collector 2, and the sewage valve is opened, and the impurities at the bottom of the dust collector 2 can be discharged through the sewage pipe 17.

[0024] The submersible pump 10, the driving motor 14, the suction pump 19 and the fan 26 of the coal-fired desulfurization and dust removal device of a thermal power plant of the utility model are purchased on the market. The technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for the technicians in this field to make creative labor.

[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A coal-fired desulfurization and dust removal device for a thermal power plant, comprising a base (1) and a dust removal cylinder (2), wherein the dust removal cylinder (2) is fixedly connected to the top of the base (1); characterized in that: It also includes a heat exchange mechanism, a dust removal mechanism, a sewage discharge mechanism and a desulfurization mechanism, wherein the heat exchange mechanism is mounted on the left portion of the top end of the base (1), the dust removal mechanism is mounted inside the dust removal cylinder (2), the output end of the heat exchange mechanism is connected to the dust removal mechanism, the sewage discharge mechanism is mounted on the bottom end of the dust removal cylinder (2), the desulfurization mechanism is mounted on the right portion of the top end of the base (1), and the input end of the desulfurization mechanism is connected to the output end of the dust removal cylinder (2).

2. A coal-fired desulfurization and dust removal device for a thermal power plant as claimed in claim 1, characterized in that: The heat exchange mechanism comprises a heat exchange cylinder (3), a circulating flue (4), a smoke inlet pipe (5), an output pipe (6), a liquid outlet pipe (7) and a liquid inlet pipe (8). The heat exchange cylinder (3) is fixedly mounted on the left portion of the top end of the base (1). The circulating flue (4) is mounted inside the heat exchange cylinder (3). The input end of the circulating flue (4) is connected to the smoke inlet pipe (5). The smoke inlet pipe (5) is located outside the heat exchange cylinder (3). The output end of the circulating flue (4) is connected to the output pipe (6). The output pipe (6) extends into the bottom end of the interior of the dust removal cylinder (2). The liquid outlet pipe (7) and the liquid inlet pipe (8) are fixedly mounted on the top end of the heat exchange cylinder (3). The bottom of the liquid inlet pipe (8) is input into the bottom end of the interior of the heat exchange cylinder (3).

3. A coal-fired desulfurization and dust removal device for a thermal power plant as claimed in claim 2, characterized in that: The dust removal mechanism comprises an activated carbon filter layer (9), a submersible pump (10), a water pipe (11), a nozzle (12) and a plurality of flushing nozzles (13); water is provided at the lower end of the interior of the dust removal cylinder (2); the output end of the output pipe (6) extends into the water; the activated carbon filter layer (9) is fixedly mounted on the upper side wall of the dust removal cylinder (2); the submersible pump (10) is fixedly mounted inside the dust removal cylinder (2); the output end of the submersible pump (10) is connected to the water pipe (11); the output end of the water pipe (11) passes through the side wall of the dust removal cylinder (2) and is located above the activated carbon filter layer (9); the output end of the water pipe (11) is connected to the nozzle (12); and a plurality of flushing nozzles (13) are mounted at the bottom of the nozzle (12).

4. A coal-fired desulfurization and dust removal device for a thermal power plant as claimed in claim 3, characterized in that: The sewage discharge mechanism comprises a driving motor (14), a rotating shaft (15), a spiral conveying blade (16) and a sewage discharge pipe (17); the driving motor (14) is fixedly mounted on the lower end of the rear side wall of the dust removal cylinder (2); the output end of the driving motor (14) is fixedly connected to the rotating shaft (15); the rotating shaft (15) is rotatably mounted inside the dust removal cylinder (2); the spiral conveying blade (16) is fixedly mounted on the outer wall of the rotating shaft (15); the sewage discharge pipe (17) is fixedly connected to the front end side wall of the dust removal cylinder (2); and a sewage discharge valve is provided on the sewage discharge pipe (17).

5. A coal-fired desulfurization and dust removal device for a thermal power plant as claimed in claim 1, characterized in that: The desulfurization mechanism comprises a desulfurization tank (18), a liquid suction pump (19), an ammonia water inlet pipe (20), an annular water spray pipe (21), a plurality of atomizing nozzles (22), a funnel-shaped baffle (23) and a waste liquid pipe (24). The desulfurization tank (18) is fixedly mounted on the right portion of the top end of the base (1). The liquid suction pump (19) is fixedly connected to the right side wall of the desulfurization tank (18). An input pipe is arranged at the input end of the liquid suction pump (19). The output end of the liquid suction pump (19) is connected to the ammonia water inlet pipe (20). The output end of the ammonia water inlet pipe (20) is connected to the annular water spray pipe (21). A plurality of atomizing nozzles (22) are evenly mounted at the bottom of the annular water spray pipe (21). The funnel-shaped baffle (23) is fixedly mounted on the lower end of the interior of the desulfurization tank (18). The lower portion of the left side wall of the desulfurization tank (18) is connected to the waste liquid pipe (24).

6. A coal-fired desulfurization and dust removal device for a thermal power plant as claimed in claim 5, characterized in that: It also includes a smoke pipe (25), a fan (26) and a smoke exhaust pipe (27). The input end of the smoke pipe (25) is connected to the output end at the top of the dust removal cylinder (2). The output end of the smoke pipe (25) passes through the side wall of the desulfurization tank (18) and is connected to the interior of the desulfurization tank (18). The fan (26) is installed on the smoke pipe (25). The smoke exhaust pipe (27) is fixedly connected to the top of the desulfurization tank (18).

7. A coal-fired desulfurization and dust removal device for a thermal power plant as claimed in claim 5, characterized in that: It also includes a second activated carbon filter layer (28) and a water absorption layer (29), which are fixedly mounted on the inner wall of the desulfurization tank (18) above the annular water spray pipe (21).

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