A dust removal device for wet flue gas desulfurization in coal-fired power plants

Abstract

The utility model discloses a dust removal device for wet flue gas desulfurization in a coal-fired power plant, which relates to the technical field of wet desulfurization, and comprises: a desulfurization system, a smoke outlet pipe is fixedly installed on one side of the top of the desulfurization system, a water storage tank is fixedly installed in the middle of the top of the desulfurization system, a guide plate is fixedly installed on the bottom of the water storage tank, a diverter plate is fixedly installed on one side of the middle of the water storage tank, and a connecting block is fixedly installed in the middle of the diverter plate. The dust removal device for wet flue gas desulfurization in a coal-fired power plant sends the flue gas discharged from the desulfurization system into the water storage tank through the smoke outlet pipe, and the U-shaped shape of the smoke outlet pipe avoids the phenomenon of water backflow in the water storage tank. When the flue gas is blown into the bottom of the water storage tank for discharge, the flue gas passes through the diverter plate after discharge, and the flue gas is diverted into fine bubbles through a plurality of diverter holes arranged on the diverter plate, so that the flue gas can fully contact with water.

Description

Technical Field

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

[0002] Wet desulfurization is characterized by the desulfurization system being located at the end of the flue and after the dust collector. The reaction temperature of the desulfurization process is lower than the dew point, so the flue gas after desulfurization needs to be reheated before it can be discharged. Because it is a gas-liquid reaction, its desulfurization reaction speed is fast, the efficiency is high, and the utilization rate of desulfurization additives is high. For example, when lime is used as a desulfurizer, when Ca / S=1, a desulfurization rate of 90% can be achieved, which is suitable for flue gas desulfurization in large coal-fired power plants.

[0003] The existing referenceable Chinese utility model patent has a publication number of CN217887411U, which discloses a dust removal device for wet flue gas desulfurization in a coal-fired power plant, including a dust removal pipe, a first partition plate fixedly connected to the dust removal pipe, a second partition plate fixedly installed in the dust removal pipe and corresponding to the upper side of the first partition plate, the first partition plate and the second partition plate divide the dust removal pipe into a wet dust removal bin, a centrifugal dust removal bin and an electrostatic dust removal bin, a plurality of ventilation holes are provided on the first partition plate, a centrifugal fan is fixedly installed on the upper surface of the first partition plate, an adsorption plate is fixedly connected to the inner wall of the centrifugal dust removal bin, a plurality of through grooves are provided on the second partition plate, a spray head is fixedly installed on the lower surface of the second partition plate, and an electrostatic dust removal device is fixedly installed in the electrostatic dust removal bin. This utility model can improve the dust removal effect, realize the recycling of water resources, and reduce resource waste.

[0004] Although the above-mentioned dust removal device for wet flue gas desulfurization in coal-fired power plants solves the problem that the water used for existing dust removal flue gas has not been better recycled through the cooperation between the wet dust removal bin and the input pipe, the effect of dust removal on the flue gas by spraying water with a sprinkler head is not good, and the water cannot fully contact the flue gas, resulting in insufficient adsorption effect on impurities inside the flue gas, thereby affecting the dust removal effect. Utility Model Content

[0005] The utility model aims to overcome the problem of poor water filtering effect in the prior art and provides a dust removal device for wet flue gas desulfurization in a coal-fired power plant.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A dust removal device for wet flue gas desulfurization in a coal-fired power plant, comprising:

[0008] A desulfurization system, wherein a smoke outlet pipe is fixedly installed on one side of the top of the desulfurization system, and the smoke outlet pipe is in a "U" shape. A water storage tank is fixedly installed in the middle of the top of the desulfurization system, and a guide plate is fixedly installed on the inner bottom of the water storage tank. A diverter plate is fixedly installed on one side of the inner middle of the water storage tank, and a plurality of diverter holes are arranged in the middle of the diverter plate. A connecting block is fixedly installed in the middle of the diverter plate. A water pump is fixedly installed on one side of the water storage tank, a drain pipe is fixedly installed on one side of the water pump, and a filter is fixedly installed on the other side of the water pump. A water outlet pipe is fixedly installed on one side of the filter, a diverter block is fixedly installed on one side of the water outlet pipe, and atomizing water curtains are fixedly installed on both sides of the bottom of the diverter block.

[0009] In a preferred embodiment, a top plate is fixedly mounted on the top of the water storage tank, and an air outlet box is fixedly mounted on one side of the top of the top plate, and the air outlet box is a structure for air outlet.

[0010] In a preferred embodiment, a connecting ring is fixedly installed on the inner bottom of the air outlet box, and an intercepting net is fixedly installed on the outer side of the bottom of the connecting ring, and the intercepting net is a structure for filtering dust.

[0011] In a preferred embodiment, a filter screen is fixedly installed inside the bottom of the connecting ring, and a connecting pipe is fixedly installed on one side of the air outlet box, and the connecting pipe is a structure used for connection.

[0012] In a preferred embodiment, a vacuum pump is fixedly mounted on one side of the connecting pipe, and a purifier is fixedly mounted on one side of the vacuum pump, wherein the purifier is a structure for purifying flue gas.

[0013] In a preferred embodiment, a smoke exhaust pipe is fixedly installed in the middle of the top of the purifier, and a support plate is fixedly installed at the bottom of the purifier, and the support plate is a supporting structure.

[0014] In a preferred embodiment, a support rod is fixedly installed in the middle of the bottom of the support plate, a bottom plate is fixedly installed at the bottom of the support rod, and the base is a structure for supporting the bottom.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The dust removal device for wet flue gas desulfurization in a coal-fired power plant sends the flue gas discharged from the desulfurization system into the water storage tank through the smoke outlet pipe. The U-shaped smoke outlet pipe avoids the phenomenon of water backflow in the water storage tank. When the flue gas is blown into the bottom of the water storage tank and discharged, the water in the water storage tank adsorbs the impurity particles and dust in the flue gas. After the flue gas is discharged, it passes through the diverter plate and is diverted into fine bubbles through a plurality of diverter holes arranged on the diverter plate, so that the flue gas can fully contact with water, thereby filtering the flue gas, thereby improving the filtering effect of water filtration of the dust removal device for wet flue gas desulfurization in a coal-fired power plant;

[0017] 2. The dust removal device for wet flue gas from a coal-fired power plant uses a water storage tank to perform double filtration on the flue gas after water filtration through an interception net on the outside of the bottom of the connecting ring and an internal filter net, thereby performing a secondary filtration on dust and impurities in the flue gas that have not been completely absorbed by water. The aperture of the filter net is smaller than that of the interception net, thereby achieving a double-layer filtration effect. The flue gas is again filtered with water through double-sided water curtains sprayed by two atomized water curtains, thereby allowing the water curtain to absorb gases and impurities in the flue gas that can be absorbed by water, and sewage flows into the interior of the air outlet box along the slope of the connecting pipe, and reversely flushes the filter net and the interception net, thereby avoiding clogging of the filter net and the interception net, thereby improving the practicability and filtration effect of the dust removal device for wet flue gas from a coal-fired power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the desulfurization system in the utility model;

[0020] Figure 3 It is a schematic diagram of a water pump in the utility model;

[0021] Figure 4 It is a schematic diagram of the top plate in the utility model;

[0022] Figure 5 It is a schematic diagram of the air pump in the utility model.

[0023] 1. Desulfurization system; 11. Smoke outlet pipe; 12. Water storage tank; 13. Guide plate; 14. Diverter plate; 15. Connecting block; 2. Water pump; 21. Drain pipe; 22. Filter; 23. Water outlet pipe; 24. Diverter block; 25. Atomizing water curtain; 3. Top plate; 31. Air outlet box; 32. Connecting ring; 33. Intercepting net; 34. Filter; 35. Connecting pipe; 4. Air pump; 41. Purifier; 42. Smoke outlet pipe; 43. Support plate; 44. Support rod; 45. Bottom plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Combined with Figure 1-Figure 5 In this embodiment, a dust removal device for wet flue gas desulfurization in a coal-fired power plant includes: a desulfurization system 1, a smoke outlet pipe 11 is fixedly installed on one side of the top of the desulfurization system 1, and the smoke outlet pipe 11 is in a "U" shape. A water storage tank 12 is fixedly installed in the middle of the top of the desulfurization system 1, and a guide plate 13 is fixedly installed at the bottom of the water storage tank 12. A diverter plate 14 is fixedly installed on one side of the middle of the water storage tank 12, and a plurality of diverter holes are arranged in the middle of the diverter plate 14. A connecting block 15 is fixedly installed in the middle of the diverter plate 14.

[0026] Specifically, the flue gas discharged from the desulfurization system 1 is sent to the inside of the water tank 12 through the smoke outlet pipe 11. The U-shaped shape of the smoke outlet pipe 11 avoids the backflow of water in the water tank 12. When the smoke is blown into the bottom of the water tank 12 and discharged, the smoke passes through the diverter plate 14 after being discharged, and the smoke is diverted into fine bubbles through a plurality of diverter holes arranged on the diverter plate 14, so that the smoke can fully contact with water, thereby filtering the smoke, thereby improving the filtering effect of the water filtration of the dust removal device for wet desulfurization flue gas in coal-fired power plants. The guide plate 13 has a structure with high sides and low one side, so that impurities precipitated in the water inside the water tank 12 can be guided to facilitate filtration after being pumped out by the water pump 2. The connecting block 15 in the middle of the diverter plate 14 is a structure for connecting the smoke outlet pipe 11.

[0027] A water pump 2 is fixedly installed on one side of the water storage tank 12, a drain pipe 21 is fixedly installed on one side of the water pump 2, a filter 22 is fixedly installed on the other side of the water pump 2, a water outlet pipe 23 is fixedly installed on one side of the filter 22, a diverter block 24 is fixedly installed on one side of the water outlet pipe 23, and atomizing water curtains 25 are fixedly installed on both sides of the bottom of the diverter block 24.

[0028] Specifically, sewage containing dust and impurities is pumped out by the water pump 2 and sent to the filter 22 for filtration. The filtered water is sent from the outlet pipe 23 to the diversion block 24 for diversion. Finally, the diverted water is sent to two atomizing water curtains 25 for spraying, thereby forming a water circulation filtration, avoiding the waste of water resources and effectively improving the water filtration effect. The filter 22 can be opened from the top to replace the internal filter element. The atomizing water curtain 25 can atomize the water and spray it out in a straight line. The water curtain shape can be fully contacted with the flue gas, thereby improving the filtering effect of the dust removal device for wet desulfurization flue gas in a coal-fired power plant.

[0029] A top plate 3 is fixedly mounted on the top of the water storage tank 12 , and an air outlet box 31 is fixedly mounted on one side of the top of the top plate 3 .

[0030] A connecting ring 32 is fixedly installed on the inner bottom of the gas outlet box 31 , and an intercepting net 33 is fixedly installed on the outer side of the bottom of the connecting ring 32 .

[0031] A filter screen 34 is fixedly installed inside the bottom of the connecting ring 32 , and a connecting pipe 35 is fixedly installed on one side of the air outlet box 31 .

[0032] Specifically, the flue gas filtered by the water tank 12 is doubly filtered by the interception net 33 on the outside of the bottom of the connecting ring 32 and the filter net 34 inside, thereby performing a second filtration on the dust and impurities in the flue gas that have not been completely absorbed by the water. The pore size of the filter net 34 is smaller than that of the interception net 33, so that a double-layer filtration effect can be achieved. The top plate 3 is a structure for sealing the top of the water tank 12, and the air outlet box 31 and the connecting pipe 35 are structures for discharging smoke. The connecting pipe 35 is in an inclined shape, and the atomized water sprayed by the atomizing water curtain 25 can flow back into the water tank 12.

[0033] An air pump 4 is fixedly mounted on one side of the connecting pipe 35 , and a purifier 41 is fixedly mounted on one side of the air pump 4 .

[0034] A smoke exhaust pipe 42 is fixedly installed in the middle of the top of the purifier 41 , and a support plate 43 is fixedly installed at the bottom of the purifier 41 .

[0035] A support rod 44 is fixedly installed in the middle of the bottom of the support plate 43 , and a bottom plate 45 is fixedly installed at the bottom of the support rod 44 .

[0036] Specifically, the water inside the drainage pipe 21 is pumped into the water storage tank 12 by the water pump 2, and air is pumped out by the air pump 4, thereby avoiding the problem of difficulty in smoke exhaust due to the U-shape of the smoke exhaust pipe 11. The air pump 4 can assist the smoke exhaust pipe 11 in exhausting air, and the air pump 4 sends the extracted gas into the purifier 41 and discharges it from the smoke exhaust pipe 42 after final purification. The air pump 4 and the purifier 41 are placed by a support plate 43, and the support plate 43 is supported by a support rod 44 and a bottom plate 45, thereby improving the stability of the dust removal device for wet desulfurization flue gas in a coal-fired power plant.

[0037] Working principle: First, the flue gas discharged from the desulfurization system 1 is sent to the water storage tank 12 through the flue gas outlet pipe 11. The U-shaped flue gas outlet pipe 11 avoids the backflow of water in the water storage tank 12. When the flue gas is blown into the bottom of the water storage tank 12 and discharged, the water in the water storage tank 12 adsorbs the impurity particles and dust in the flue gas. After the flue gas is discharged, it passes through the diverter plate 14 and is diverted into fine bubbles through a plurality of diverter holes provided on the diverter plate 14, so that the flue gas can fully contact with water, thereby The filtration is performed to improve the filtration effect of the water filtration of the dust removal device for wet flue gas desulfurization in coal-fired power plants. The flue gas filtered by the water storage tank 12 is double-filtered by the interception net 33 on the outside of the bottom of the connecting ring 32 and the internal filter net 34, so that the dust and impurities in the flue gas that have not been completely absorbed by the water are filtered for the second time. The pore size of the filter net 34 is smaller than the interception net 33, so that a double-layer filtration effect can be achieved. The double-sided water curtains sprayed by the two atomizing water curtains 25 filter the flue gas again with water, so that the water curtains can remove the dust and impurities in the flue gas. The gas and impurities absorbed by the water are absorbed, and the sewage flows into the interior of the gas outlet box 31 along the slope of the connecting pipe 35, and the filter screen 34 and the interception net 33 are backwashed, thereby avoiding the clogging of the filter screen 34 and the interception net 33, improving the practicality and filtering effect of the dust removal device for wet flue gas desulfurization in coal-fired power plants, and guiding the dust and impurities precipitated in the water inside the water storage tank 12 through the guide plate 13, and the sewage containing dust and impurities is pumped out by the water pump 2 and sent to the filter 22 for filtration, and the filtered water is discharged from the outlet pipe 23 is sent to the inside of the diversion block 24 for diversion, and finally the diverted water is sent to the two atomizing water curtains 25 for spraying, thereby forming a water circulation filtration. When water needs to be added, the external water pipe can be connected to the drain pipe 21, and the water inside the drain pipe 21 is pumped into the water storage tank 12 by the water pump 2, and the air is pumped by the air pump 4, thereby avoiding the problem of difficulty in smoke exhaust due to the U-shape of the smoke outlet pipe 11. The air pump 4 can assist the smoke outlet pipe 11 in exhausting, and the air pump 4 sends the extracted gas into the purifier 41 and is discharged from the smoke exhaust pipe 42 after the final purification.

[0038] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dust removal device for wet flue gas desulfurization in a coal-fired power plant, comprising a desulfurization system (1), characterized in that: A smoke outlet pipe (11) is fixedly mounted on one side of the top of the desulfurization system (1), and the smoke outlet pipe (11) is in a "U" shape. A water storage tank (12) is fixedly mounted in the middle of the top of the desulfurization system (1), and a guide plate (13) is fixedly mounted on the bottom of the water storage tank (12). A diverter plate (14) is fixedly mounted on one side of the middle of the water storage tank (12), and a plurality of diverter holes are arranged in the middle of the diverter plate (14). A connecting block (15) is fixedly installed, a water pump (2) is fixedly installed on one side of the water storage tank (12), a drainage pipe (21) is fixedly installed on one side of the water pump (2), a filter (22) is fixedly installed on the other side of the water pump (2), a water outlet pipe (23) is fixedly installed on one side of the filter (22), a diverter block (24) is fixedly installed on one side of the water outlet pipe (23), and atomizing water curtains (25) are fixedly installed on both sides of the bottom of the diverter block (24).

2. A dust removal device for wet flue gas desulfurization in a coal-fired power plant according to claim 1, characterized in that: A top plate (3) is fixedly mounted on the top of the water storage tank (12), and an air outlet box (31) is fixedly mounted on one side of the top of the top plate (3).

3. A dust removal device for wet flue gas desulfurization in a coal-fired power plant according to claim 2, characterized in that: A connecting ring (32) is fixedly mounted on the inner bottom of the gas outlet box (31), and an intercepting net (33) is fixedly mounted on the outer side of the bottom of the connecting ring (32).

4. A dust removal device for wet flue gas desulfurization in a coal-fired power plant according to claim 3, characterized in that: A filter screen (34) is fixedly mounted inside the bottom of the connecting ring (32), and a connecting pipe (35) is fixedly mounted on one side of the air outlet box (31).

5. A dust removal device for wet flue gas desulfurization in a coal-fired power plant according to claim 4, characterized in that: An air pump (4) is fixedly mounted on one side of the connecting pipe (35), and a purifier (41) is fixedly mounted on one side of the air pump (4).

6. A dust removal device for wet flue gas desulfurization in a coal-fired power plant according to claim 5, characterized in that: A smoke exhaust pipe (42) is fixedly installed in the middle of the top of the purifier (41), and a support plate (43) is fixedly installed at the bottom of the purifier (41).

7. A dust removal device for wet flue gas desulfurization in a coal-fired power plant according to claim 6, characterized in that: A support rod (44) is fixedly mounted in the middle of the bottom of the support plate (43), and a bottom plate (45) is fixedly mounted at the bottom of the support rod (44).

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