Thermal power plant production flue gas transmission pipeline

Abstract

The utility model relates to the technical field of thermal power plants, and discloses a thermal power plant production flue gas transmission pipeline which comprises a shell, a bottom cavity, a middle cavity and a top cavity are arranged on the inner side of the shell from bottom to top, partition plates are arranged between the bottom cavity and the middle cavity and between the middle cavity and the top cavity, and a conveying mechanism used for conveying waste gas is arranged on the inner side of the bottom cavity. A recycling mechanism used for recycling waste heat of waste gas is arranged on the inner side of the middle cavity, and a purifying mechanism used for purifying the waste gas is arranged on the inner side of the top cavity. By means of the conveying mechanism, the recycling mechanism and the purifying mechanism, during use, a user can convey waste gas into the recycling mechanism through the conveying mechanism, then waste heat of the waste gas is recycled through the recycling mechanism, the waste gas can be purified through the purifying mechanism, and the waste heat of the waste gas can be recycled in a circulating mode. Therefore, the recovery efficiency is improved, and the waste gas can be primarily purified, so that the subsequent thorough purification of the waste gas is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal power plants, and in particular to a flue gas transmission pipeline for thermal power plants. Background Art

[0002] The flue gas transmission pipeline of a thermal power plant refers to the pipeline system that transports the flue gas generated by combustion in the thermal power plant from the combustion equipment to the chimney or emission equipment. These pipeline systems are usually composed of various pipes, valves, connectors and brackets to ensure that the flue gas can be effectively and safely transported and discharged.

[0003] The Chinese utility model patent with application number: CN201822016302.4 discloses a waste heat recovery device for a thermal power plant, including a treatment chamber, the top of which is penetrated by an air inlet, and the interior of the treatment chamber is provided with a V-shaped plate, a long inclined plate and a short inclined plate in sequence from top to bottom, the bottom of the treatment chamber is provided with an ash storage box, and the outer surface of the ash storage box is provided with a safety door. The waste heat recovery device for a thermal power plant is provided with a water storage tank, an air transmission pipe and an air outlet pipe. When the hot air enters the lower part of the interior of the waste heat recovery chamber through the air transmission pipe, due to the effect of air pressure, the hot air will first float to the top of the waste heat recovery chamber, and finally the hot air will be discharged to the air outlet pipe at the lower side of the waste heat recovery chamber. In the process of hot gas entering and discharging, the hot gas will contact the outer surface of the water storage tank, and because the outer surface area of ​​the water storage tank is large, the hot gas heats the water more evenly, thereby avoiding the situation where uneven heating of water affects the efficiency of waste heat recovery.

[0004] However, when the above technical solution is in use, since it only has one water storage tank, when the water in the water tank has been heated to the specified temperature but the exhaust gas has not been completely discharged, the user can only drain the water in the water tank first and then add cold water to the water tank again. However, during the period of adding water, the exhaust gas will continue to move in the delivery pipe, resulting in this part of the waste heat cannot be completely recovered, thereby resulting in a waste of resources, and the purification mechanism provided is relatively simple, resulting in limited treatment effect on the exhaust gas. Utility Model Content

[0005] The utility model aims to provide a flue gas transmission pipeline for a thermal power plant to solve the problem in the prior art that, when the above-mentioned technical solution is used, since only one water storage tank is provided, when the water in the water storage tank has been heated to a specified temperature but the exhaust gas has not been completely discharged, the user can only drain the water in the water storage tank first and then add cold water to the water storage tank again. However, during the period of adding water, the exhaust gas will continue to move in the transmission pipe, resulting in the inability to completely recover this part of the waste heat, thereby causing a waste of resources, and the purification mechanism provided is relatively simple, resulting in a limited treatment effect on the exhaust gas.

[0006] The utility model provides the following technical solution: a flue gas transmission pipeline for a thermal power plant, comprising an outer shell, the inner side of which is respectively provided with a bottom cavity, a middle cavity and a top cavity from bottom to top, partitions are provided between the bottom cavity and the middle cavity and between the middle cavity and the top cavity, a conveying mechanism for conveying waste gas is provided on the inner side of the bottom cavity, a recovery mechanism for recovering waste heat of the waste gas is provided on the inner side of the middle cavity, and a purification mechanism for purifying the waste gas is provided on the inner side of the top cavity.

[0007] As a preferred embodiment of the above technical solution, the conveying mechanism includes an air intake pipe fixedly connected to the outside of the shell, the outside of the air intake pipe is fixedly connected to an electric ball valve, the top of the electric ball valve is fixedly connected to a first connecting pipe, and the end of the electric ball valve away from the air intake pipe is fixedly connected to a second connecting pipe.

[0008] As a preferred embodiment of the above technical solution, one end of the air inlet pipe away from the shell is connected to the exhaust gas output pipe of the combustion boiler, the first connecting pipe and the second connecting pipe are both connected to the electric ball valve, and the first connecting pipe and the second connecting pipe are vertically distributed.

[0009] As a preferred embodiment of the above technical solution, the recovery mechanism includes two recovery water tanks fixedly connected to the first connecting pipe and the second connecting pipe, a spiral tube is arranged on the inner side of the recovery water tank, a water inlet pipe and a water outlet pipe are arranged on the inner side of the recovery water tank, and a temperature sensor is arranged on the inner bottom of the recovery water tank. The user can discharge the exhaust gas into the electric ball valve through the air inlet pipe, and then discharge the exhaust gas into the first connecting pipe through the electric ball valve, and then enter the spiral tube in the left recovery water tank through the first connecting pipe. At this time, the exhaust gas will move in the spiral tube. At this time, the exhaust gas can heat the cold water in the left recovery water tank, thereby realizing the recycling of the waste heat of the exhaust gas. When the water in the left recovery water tank is heated to the specified temperature, the user can control the electric ball valve to close the first connecting pipe through the control panel. At this time, the exhaust gas can enter the second connecting pipe through the electric ball valve, and then enter the right recovery water tank. After that, the water in the right recovery water tank can be heated, thereby realizing the cyclic recovery of the waste heat of the exhaust gas, and the temperature sensor can facilitate the user to understand the water temperature in the recovery water tank in real time.

[0010] As a preferred embodiment of the above technical solution, the two recovery water tanks are fixedly connected to the top of the partition between the bottom cavity and the middle cavity, spiral tubes are arranged on the inner sides of the two recovery water tanks, and the ends of the two spiral tubes away from the recovery water tanks are distributed on the inner side of the top cavity, and water inlet pipes and water outlet pipes are arranged on the inner sides of the two recovery water tanks, and the ends of the two water inlet pipes and water outlet pipes away from the recovery water tanks are distributed on the outer side of the outer shell.

[0011] As a preferred embodiment of the above technical solution, the purification mechanism includes a purification box fixedly connected to two spiral tubes, a water pool is arranged at the inner bottom of the purification box, a filter is installed on the inner side of the water pool, a delivery pipe is fixedly connected to the outer side of the water pool, an end of the delivery pipe away from the water pool passes through the purification box and the outer shell and is fixedly connected to a water pump, an end of the water pump away from the delivery pipe is fixedly connected to an inlet pipe, an end of the inlet pipe away from the water pump passes through the outer shell and the purification box and is fixedly connected to a spray plate, a filling pipe and a drain pipe are arranged on the outer side of the purification box, and an exhaust pipe is also arranged on the outer side of the purification box. When in use, the user can add purification solution to the water pool through the filling pipe, and then start the water pump. The operation of the water pump will pump the water into the pool through the delivery pipe. The purified solution in the waste gas is transported to the inlet pipe and then sprayed out through the spray plate. Then the user can transport the waste gas to the recovery mechanism through the conveying mechanism, and then the waste heat of the waste gas is recovered through the recovery mechanism. Then the waste gas will enter the purification box. At this time, the waste gas will rise in the purification box. At this time, the purified solution sprayed by the spray plate can purify and remove dust from the waste gas. Then the waste gas can be discharged from the purification box through the exhaust pipe, and the solution after purifying the waste gas will fall into the pool under the influence of gravity. Then it will be sent to the spray plate by the conveying pipe, water pump and inlet pipe again, and then the waste gas can be purified again, thereby achieving the effect of purifying and cooling the waste gas and removing dust from the waste gas.

[0012] As a preferred embodiment of the above technical solution, the purification box is fixedly connected to the partition between the top cavity and the middle cavity, and a guide plate is also provided on the inner side of the purification box, and the guide plate is distributed above the two spiral tubes. The spray plate is distributed on the inner side of the purification box, and a plurality of nozzles are provided at the bottom of the spray plate. The water pump is fixedly connected to the top of the outer shell, and the ends of the filling pipe and the drain pipe away from the water pool pass through the purification box and the outer shell and are distributed on the outside of the outer shell.

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

[0014] The utility model is provided with a conveying mechanism, a recycling mechanism and a purification mechanism. When in use, the user can fill the two recycling water tanks with water through the water inlet pipe, and then fill the purification solution into the water pool through the filling pipe, and then start the water pump. The water pump will convey the purification solution in the water pool to the inlet pipe through the conveying pipe, and then spray it out through the spray plate. At this time, the user can exhaust the exhaust electric ball valve of the exhaust gas through the air inlet pipe, and then discharge the exhaust gas into the first connecting pipe through the electric ball valve, and then enter the spiral pipe in the left recycling water tank through the first connecting pipe. At this time, the exhaust gas will move in the spiral pipe. At this time, the exhaust gas can heat the cold water in the left recycling water tank, so as to realize the recycling of the waste heat of the exhaust gas. When the exhaust gas moves to a certain position, it will enter the purification box through the spiral pipe. At this time, the exhaust gas will rise in the purification box, and the purification solution sprayed by the spray plate can be The exhaust gas is purified and dust-removed, and then the exhaust gas can be discharged from the purification box through the exhaust pipe, and the solution after purifying the exhaust gas will fall into the pool under the influence of gravity, and then be sent to the spray plate by the delivery pipe, water pump and inlet pipe again, and then the exhaust gas can be purified again. When the water in the left recovery water tank is discarded and heated to the user-specified temperature, the user can control the electric ball valve through the control panel to close the first connecting pipe. At this time, the exhaust gas can enter the second connecting pipe through the electric ball valve, and then enter the right recovery water tank. The water in the right recovery water tank can be heated, and then the exhaust gas enters the purification box again. At this time, the purification mechanism can continue to purify the exhaust gas, so as to achieve the recycling of the waste heat of the exhaust gas, thereby improving the recovery efficiency, and the exhaust gas can be preliminarily purified, so as to facilitate the subsequent thorough purification of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A flue gas transmission pipeline for a thermal power plant is produced in a first-person perspective;

[0016] Figure 2 It is a schematic cross-sectional view of a local structure in a flue gas transmission pipeline of a thermal power plant;

[0017] Figure 3 It is a schematic cross-sectional view of a local structure in a flue gas transmission pipeline of a thermal power plant;

[0018] Figure 4 for Figure 2 A schematic diagram of the structure enlargement in the middle;

[0019] Figure 5 for Figure 3 Enlarged schematic diagram of the structure at point B in the middle.

[0020] In the figure: 1. outer shell; 11. air inlet pipe; 12. electric ball valve; 13. first connecting pipe; 14. second connecting pipe; 2. bottom cavity; 21. recovery water tank; 22. spiral tube; 23. water inlet pipe; 24. water outlet pipe; 25. temperature sensor; 3. middle cavity; 31. purification box; 32. water pool; 33. filter; 34. delivery pipe; 35. water pump; 36. delivery pipe; 37. spray plate; 38. filling pipe; 39. drain pipe; 310. exhaust pipe; 4. top cavity; 5. partition. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] Embodiment 1

[0023] like Figure 1 , Figure 2 and Figure 4As shown, the utility model provides a technical solution: a flue gas transmission pipeline for a thermal power plant, comprising a shell 1, the inner side of the shell 1 is respectively provided with a bottom cavity 2, a middle cavity 3 and a top cavity 4 from bottom to top, a partition 5 is provided between the bottom cavity 2 and the middle cavity 3 and between the middle cavity 3 and the top cavity 4, a conveying mechanism for conveying waste gas is provided on the inner side of the bottom cavity 2, a recovery mechanism for recovering the waste heat of the waste gas is provided on the inner side of the middle cavity 3, a purification mechanism for purifying the waste gas is provided on the inner side of the top cavity 4, and the conveying mechanism includes a fixed connection to the shell 1 The outer air intake pipe 11 is fixedly connected to the outside of the air intake pipe 11 with an electric ball valve 12, which is used to divert the exhaust gas entering the air intake pipe 11, and its model is: TQ electric T-type three-way ball valve, the top of the electric ball valve 12 is fixedly connected to a first connecting pipe 13, and the end of the electric ball valve 12 away from the air intake pipe 11 is fixedly connected to a second connecting pipe 14, and the end of the air intake pipe 11 away from the shell 1 is connected to the exhaust gas output pipe of the combustion boiler, and the first connecting pipe 13 and the second connecting pipe 14 are both connected to the electric ball valve 12, and the first connecting pipe 13 and the second connecting pipe 14 is vertically distributed, the recovery mechanism includes two recovery water tanks 21 fixedly connected to the first connecting pipe 13 and the second connecting pipe 14, the inner side of the recovery water tank 21 is provided with a spiral tube 22, the inner side of the recovery water tank 21 is provided with a water inlet pipe 23 and a water outlet pipe 24, and the inner bottom of the recovery water tank 21 is provided with a temperature sensor 25, which is used to monitor the water temperature in the recovery water tank 21, so as to facilitate the use of the water temperature, and its model is: DS18B20, the two recovery water tanks 21 are fixedly connected to the partition between the bottom cavity 2 and the middle cavity 3 At the top of the plate 5, spiral tubes 22 are provided on the inner sides of the two recovery water tanks 21, and the ends of the two spiral tubes 22 away from the recovery water tanks 21 are distributed on the inner side of the top cavity 4, and water inlet pipes 23 and water outlet pipes 24 are provided on the inner sides of the two recovery water tanks 21, and the ends of the two water inlet pipes 23 and water outlet pipes 24 away from the recovery water tanks 21 are distributed on the outer side of the outer shell 1, and a control panel with a display screen is also provided on the outer side of the outer shell 1, which is used to display the temperature detected by the temperature sensor 25 and control the electric ball valve 12 and the water pump 35.

[0024] Through the above technical solution, when in use, the user can discharge the exhaust gas into the electric ball valve 12 through the air intake pipe 11, and then discharge the exhaust gas into the first connecting pipe 13 through the electric ball valve 12, and then enter the spiral tube 22 in the left recovery water tank 21 through the first connecting pipe 13. At this time, the exhaust gas will move in the spiral tube 22. At this time, the exhaust gas can heat the cold water in the left recovery water tank 21, so as to realize the recycling of the waste heat of the exhaust gas. When the water in the left recovery water tank 21 is heated to the specified temperature, the user can control the electric ball valve 12 to close the first connecting pipe 13 through the control panel. At this time, the exhaust gas can enter the second connecting pipe 14 through the electric ball valve 12, and then enter the right recovery water tank 21. After that, the water in the right recovery water tank 21 can be heated, so as to realize the cyclic recovery of the waste heat of the exhaust gas, and the temperature sensor 25 can facilitate the user to understand the water temperature in the recovery water tank 21 in real time.

[0025] Embodiment 2

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the utility model provides a technical solution: a flue gas transmission pipeline for a thermal power plant, comprising a shell 1, the inner side of the shell 1 is respectively provided with a bottom cavity 2, a middle cavity 3 and a top cavity 4 from bottom to top, a partition 5 is provided between the bottom cavity 2 and the middle cavity 3 and between the middle cavity 3 and the top cavity 4, the inner side of the bottom cavity 2 is provided with a conveying mechanism for conveying exhaust gas, the inner side of the middle cavity 3 is provided with a recovery mechanism for recovering the residual heat of the exhaust gas, the inner side of the top cavity 4 is provided with a purification mechanism for purifying the exhaust gas, the purification mechanism comprises a purification box 31 fixedly connected to two spiral tubes 22, a water pool 32 is provided at the inner bottom of the purification box 31, a filter screen 33 is installed on the inner side of the water pool 32, a conveying pipe 34 is fixedly connected to the outer side of the water pool 32, and the end of the conveying pipe 34 away from the water pool 32 passes through the purification box 31 and the outer The shell 1 is fixedly connected to a water pump 35, and one end of the water pump 35 away from the delivery pipe 34 is fixedly connected to an inlet pipe 36, and one end of the inlet pipe 36 away from the water pump 35 passes through the shell 1 and the purification box 31 and is fixedly connected to a spray plate 37, a filling pipe 38 and a drain pipe 39 are arranged on the outside of the purification box 31, and an exhaust pipe 310 is also arranged on the outside of the purification box 31, the purification box 31 is fixedly connected to the partition 5 between the top cavity 4 and the middle cavity 3, and a guide plate is also arranged on the inside of the purification box 31, and the guide plate is distributed above the two spiral tubes 22, the spray plate 37 is distributed on the inside of the purification box 31, and a plurality of nozzles are arranged at the bottom of the spray plate 37, the water pump 35 is fixedly connected to the top of the shell 1, and the ends of the filling pipe 38 and the drain pipe 39 away from the pool 32 pass through the purification box 31 and the shell 1 and are distributed on the outside of the shell 1.

[0027] Through the above technical solution, when in use, the user can add the purification solution into the water pool 32 through the filling pipe 38, and then start the water pump 35. The water pump 35 will transport the purification solution in the water pool 32 to the inlet pipe 36 through the delivery pipe 34, and then spray it out through the spray plate 37. Then the user can transport the exhaust gas to the recovery mechanism through the delivery mechanism, and then recover the waste heat of the exhaust gas through the recovery mechanism. Then the exhaust gas will enter the purification box 31. At this time, the exhaust gas will rise in the purification box 31. At this time, the purification solution sprayed by the spray plate 37 can purify and remove dust from the exhaust gas. Then the exhaust gas can be discharged from the purification box 31 through the exhaust pipe 310, and the solution after purifying the exhaust gas will fall into the water pool 32 under the influence of gravity, and then it will be sent to the spray plate 37 by the delivery pipe 34, the water pump 35 and the inlet pipe 36 again, and then the exhaust gas can be purified again, thereby achieving the effect of purifying and cooling the exhaust gas and removing dust from the exhaust gas.

[0028] The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it.

Claims

1. A flue gas transmission pipeline for a thermal power plant, comprising a housing (1), characterized in that: The inner side of the shell (1) is provided with a bottom cavity (2), a middle cavity (3) and a top cavity (4) from bottom to top, respectively; partition plates (5) are provided between the bottom cavity (2) and the middle cavity (3) and between the middle cavity (3) and the top cavity (4); a conveying mechanism for conveying waste gas is provided on the inner side of the bottom cavity (2); a recovery mechanism for recovering waste heat of the waste gas is provided on the inner side of the middle cavity (3); and a purification mechanism for purifying the waste gas is provided on the inner side of the top cavity (4).

2. A flue gas transmission pipeline for a thermal power plant according to claim 1, characterized in that: The conveying mechanism comprises an air intake pipe (11) fixedly connected to the outside of the housing (1); an electric ball valve (12) is fixedly connected to the outside of the air intake pipe (11); a first connecting pipe (13) is fixedly connected to the top of the electric ball valve (12); and a second connecting pipe (14) is fixedly connected to one end of the electric ball valve (12) away from the air intake pipe (11).

3. A flue gas transmission pipeline for a thermal power plant according to claim 2, characterized in that: One end of the air inlet pipe (11) away from the shell (1) is connected to the exhaust gas output pipe of the combustion boiler, the first connecting pipe (13) and the second connecting pipe (14) are both connected to the electric ball valve (12), and the first connecting pipe (13) and the second connecting pipe (14) are vertically distributed.

4. A flue gas transmission pipeline for a thermal power plant according to claim 2, characterized in that: The recovery mechanism comprises two recovery water tanks (21) fixedly connected to the first connecting pipe (13) and the second connecting pipe (14); a spiral tube (22) is arranged inside the recovery water tank (21); a water inlet pipe (23) and a water outlet pipe (24) are arranged inside the recovery water tank (21); and a temperature sensor (25) is arranged at the bottom of the inner side of the recovery water tank (21).

5. A flue gas transmission pipeline for a thermal power plant according to claim 4, characterized in that: The two recovery water tanks (21) are fixedly connected to the top of the partition (5) between the bottom cavity (2) and the middle cavity (3); the inner sides of the two recovery water tanks (21) are provided with spiral tubes (22); the ends of the two spiral tubes (22) away from the recovery water tanks (21) are distributed on the inner side of the top cavity (4); the inner sides of the two recovery water tanks (21) are provided with water inlet pipes (23) and water outlet pipes (24); the ends of the two water inlet pipes (23) and water outlet pipes (24) away from the recovery water tanks (21) are distributed on the outer side of the housing (1).

6. A flue gas transmission pipeline for a thermal power plant according to claim 5, characterized in that: The purification mechanism comprises a purification box (31) fixedly connected to the two spiral tubes (22); a water pool (32) is arranged at the inner bottom of the purification box (31); a filter screen (33) is installed on the inner side of the water pool (32); a delivery pipe (34) is fixedly connected to the outer side of the water pool (32); an end of the delivery pipe (34) away from the water pool (32) passes through the purification box (31) and the outer shell (1) and is fixedly connected to a water pump (35); an end of the water pump (35) away from the delivery pipe (34) is fixedly connected to an inlet pipe (36); an end of the inlet pipe (36) away from the water pump (35) passes through the outer shell (1) and the purification box (31) and is fixedly connected to a spray plate (37); a filling pipe (38) and a drain pipe (39) are arranged on the outer side of the purification box (31); and an exhaust pipe (310) is also arranged on the outer side of the purification box (31).

7. A flue gas transmission pipeline for a thermal power plant according to claim 6, characterized in that: The purification box (31) is fixedly connected to the partition (5) between the top cavity (4) and the middle cavity (3); a guide plate is further provided on the inner side of the purification box (31), and the guide plate is distributed above the two spiral tubes (22); the spray plate (37) is distributed on the inner side of the purification box (31), and a plurality of spray heads are provided at the bottom of the spray plate (37); the water pump (35) is fixedly connected to the top of the outer shell (1); and the ends of the filling pipe (38) and the drain pipe (39) away from the pool (32) pass through the purification box (31) and the outer shell (1) and are distributed on the outer side of the outer shell (1).

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