Flue gas sampling device of coal-fired power generation boiler
By designing a flue gas sampling device consisting of an exhaust pipe, shaft, branch pipe, sampling pipe, fan, and collection tank, the problems of inconvenient flue gas sampling and high-temperature burns from coal-fired boilers have been solved, achieving safe and convenient flue gas collection.
Patent Information
- Application Number
- CN202520279901.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-02-21
AI Technical Summary
Sampling flue gas from coal-fired boilers is inconvenient and involves high temperatures. Conventional close-range sampling methods are not safe enough and can easily cause burns.
A flue gas sampling device was designed, comprising an exhaust pipe, a shaft, a branch pipe, a sampling pipe, a fan, and a collection tank. The device controls the sealing blockage by raising and lowering the shaft, and uses the fan to extract the flue gas and collect it into the collection tank, avoiding proximity to high-temperature flue gas.
It enables safe and convenient flue gas sampling, reduces safety risks during the sampling process, ensures worker safety, and does not affect the normal emission of flue gas.
Smart Images
Figure CN223581506U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the related technical field of power plant power generation, in particular, relate to a coal-fired power plant boiler's flue gas sampling device. BACKGROUND
[0002] The coal-fired power generating unit is the heat energy that coal combustion produces, through the power generation power device (power plant boiler, steam turbine and generator and its auxiliary device etc.) conversion into electric energy. This needs coal-fired boiler, and coal-fired boiler produces flue gas in the combustion work, and the coal-fired boiler flue gas has nitrogen, carbon dioxide, oxygen, water vapor (or water), sulfur dioxide, sulfur trioxide, nitrogen oxide, dust and so on, in order to meet the discharge standard, coal-fired flue gas needs sampling detection, ensures that the harmful substance of flue gas is within the discharge standard and can be discharged, but the related sampling device has the following disadvantages in actual use:
[0003] The flue gas of coal-fired boiler is discharged through the smoke exhaust pipe, and at this time, the flue gas temperature is very high, and the position of the smoke exhaust pipe is usually very high, so that the sampling of flue gas is very inconvenient, and it is necessary to collect sampling at the source or the discharge port of flue gas, which brings a lot of trouble to the sampling work.
[0004] Secondly, because the temperature is too high when the flue gas is discharged, workers are not suitable to approach, if approaching sampling, the safety cannot be guaranteed, and high-temperature scalding phenomenon is easy to occur. UTILITY MODEL CONTENTS
[0005] The utility model discloses a coal-fired power plant boiler's flue gas sampling device, through setting up smoke exhaust pipe, shaft, branch pipe no. 1, branch pipe no. 2, sampling pipe, fan, collection jar, the inconvenient flue gas sampling at low place and the flue gas temperature are high, and the safety of conventional near sampling mode is insufficient, and the problem that is easy to be scalded is solved.
[0006] To solve the above technical problem, the utility model is realized through the following technical schemes:
[0007] The utility model discloses a coal-fired power plant boiler's flue gas sampling device, including smoke exhaust pipe, shaft, quick -plug connector, fan and collection jar, the lower part of the circumferential side of smoke exhaust pipe is fixed with vertical branch pipe no. 1 and branch pipe no. 2, the lower part of branch pipe no. 2 is fixed with valve no. 2, the lower part of branch pipe no. 1 is fixed with the sampling pipe of transverse, valve no. 1 is fixed on the sampling pipe, the shaft is movably connected in branch pipe no. 1, the top of shaft is fixed with the stopper, the vertical axis of branch pipe no. 2 and the transverse axis of sampling pipe are staggered and are provided with fan at the position, the fan below is provided with collection jar, the jar mouth of collection jar is equipped with rubber sleeve.
[0008] Further, the bottom end of the shaft rod penetrates the bottom end of the branch pipe one and is fixed with a hand wheel, the lower part of the shaft rod is provided as a threaded section, and the threaded section is in penetrating threaded connection with the bottom of the branch pipe one, and the upper part of the plugging plug is in cylindrical structure and the lower part is in reverse circular platform structure.
[0009] Further, the fan is fixed with an air extraction pipe penetratingly close to the end face of the sampling pipe, and the air extraction pipe is connected with the sampling pipe through a quick plug connector.
[0010] Further, the upper part of the outer periphery of the fan is fixed with an air outlet pipe two in penetration, and the upper end of the air outlet pipe two and the bottom end of the branch pipe two are also connected with a quick plug connector.
[0011] Further, the lower part of the outer periphery of the fan is fixed with an air outlet pipe one in penetration, and the upper part of the rubber sleeve is sleeved outside the lower end of the air outlet pipe one, and the lower part of the rubber sleeve is sleeved outside the tank opening of the collecting tank, and the upper and lower parts of the rubber sleeve are both sleeved with a buckle ring.
[0012] Further, the inner diameters of the branch pipe one, the branch pipe two and the sampling pipe are sequentially reduced.
[0013] The utility model has the following beneficial effects:
[0014] The utility model discloses a smoke exhaust pipe, a shaft rod, a branch pipe one, a branch pipe two, a sampling pipe, a fan and a collecting tank are arranged, and the problem that it is inconvenient to sample smoke at a low place is solved.When sampling smoke, the smoke in the smoke exhaust pipe is led out from the branch pipe one, the shaft rod is moved upwards, the plugging plug is separated from the branch pipe one and enters the smoke exhaust pipe, so that the smoke exhaust pipe and the branch pipe one are communicated, the smoke enters the branch pipe one, the fan works, the smoke is extracted, the smoke enters the branch pipe one from the smoke exhaust pipe and then enters the sampling pipe, at this time, the valve one is in the open state, and the valve two is in the closed state, then the smoke is output to the collecting tank through the air outlet pipe, and the smoke sampling is realized.
[0015] The utility model discloses a branch pipe one, a branch pipe two and a sampling pipe are arranged, and the problems that the temperature of the smoke is high, the safety of the conventional sampling mode close to the sampling place is insufficient and the workers are easily scalded are solved, the branch pipe two and the branch pipe one have enough height, the position of the sampling pipe is relatively low, the branch pipe two and the branch pipe one can be appropriately lengthened, the workers do not need to approach the smoke exhaust pipe, the safety is ensured, the workers are not scalded by the smoke when sampling, the branch pipe one and the branch pipe two are in the closed state when not sampling, the normal discharge of the smoke is not affected, and the smoke exhaust operation is not affected. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description.
[0017] Figure 1 It is a kind of smoke sampling device's structure perspective drawing for coal-fired power plant boiler.
[0018] Figure 2 For Figure 1 Another perspective view of the structure diagram;
[0019] Figure 3 For the exhaust pipe and branch pipe one cross-sectional view of the state diagram when sampling;
[0020] Figure 4 For the exhaust pipe and branch pipe one cross-sectional view of the state diagram when sampling;
[0021] Figure 5 For the connection diagram of the fan and the collection tank;
[0022] Figure 6 For the structure diagram of the collection tank.
[0023] Reference signs:
[0024] 1, the exhaust pipe;101, the branch pipe one;102, the sampling pipe;1021, the valve one;103, the branch pipe two;1031, the valve two;2, the shaft;201, the hand wheel;202, the threaded segment;203, the blocking plug;3, the quick connector;4, the fan;401, the exhaust pipe;402, the air outlet pipe one;403, the air outlet pipe two;5, the collection tank;501, the rubber sleeve;5011, the ring. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.
[0026] Please refer to Figures 1-6 The utility model discloses a flue gas sampling device of coal-fired power generation boiler, including exhaust pipe 1, shaft 2, quick connector 3, fan 4 and collection tank 5, the lower part of the lateral side of exhaust pipe 1 is fixedly perforated with vertical branch pipe one 101 and branch pipe two 103, the lower part of branch pipe two 103 is fixed with valve two 1031, the lower part of branch pipe one 101 is fixedly perforated with transversely placed sampling pipe 102, and valve one 1021 is fixed on sampling pipe 102, and shaft 2 is movably connected in branch pipe one 101, and the top end of shaft 2 is fixed with blocking plug 203, and fan 4 is arranged at the staggered position of the vertical axis of branch pipe two 103 and the horizontal axis of sampling pipe 102, and collection tank 5 is arranged below fan 4, and rubber sleeve 501 is sleeved on the tank mouth of collection tank 5;
[0027] The smoke exhaust pipe 1 is connected to the boiler flue gas discharge position, and the flue gas is transported out by the branch pipe one 101 towards the branch pipe two 103 direction. In the conventional state, the top of the branch pipe one 101 is closed by the blocking plug 203, and the valve two 1031 on the branch pipe two 103 is in the closed state. When sampling is needed, the shaft rod 2 is moved upwards, so that the blocking plug 203 enters the smoke exhaust pipe 1. At this time, the smoke exhaust pipe 1 is communicated with the branch pipe one 101, and the flue gas can enter the branch pipe one 101. Then the fan 4 works, and the negative pressure is generated at the exhaust pipe 401, so that the flue gas in the smoke exhaust pipe 1 is sucked into the branch pipe one 101, and then into the sampling pipe 102 (in this state, the valve one 1021 is in the open state). Finally, the flue gas is discharged through the air outlet pipe one 402, enters the collection tank 5 through the rubber sleeve 501, and is collected to obtain the flue gas sample. After the flue gas is collected, the rubber sleeve 501 is closed to prevent the flue gas in the collection tank 5 from leaking. Then the shaft rod 2 is moved downwards, so that the blocking plug 203 is lowered into the branch pipe one 101 to block it. Then the valve two 1031 is opened, and the remaining flue gas in the branch pipe one 101 and the sampling pipe 102 is sucked by the fan 4 and discharged from the air outlet pipe two 403 to return to the smoke exhaust pipe 1 through the branch pipe two 103, so that the flue gas does not leak. Finally, after a certain period of time, the flue gas is discharged, the valve two 1031 is closed, the valve one 1021 is closed, and the collection tank 5 is taken out to obtain the sample.
[0028] The bottom end of the shaft rod 2 penetrates the bottom end of the branch pipe one 101 and is fixed with a hand wheel 201. The lower part of the shaft rod 2 is provided with a threaded segment 202, and the threaded segment 202 is threadedly connected with the bottom of the branch pipe one 101 in a penetrating manner. The upper part of the blocking plug 203 is cylindrical, and the lower part is in the structure of a reverse circular truncated cone. The shaft rod 2 is rotated by the hand wheel 201. The threaded segment 202 at the lower part of the shaft rod 2 is threadedly connected with the bottom of the branch pipe one 101 in a penetrating manner, so that the shaft rod 2 is rotatably lifted and lowered, thereby controlling the lifting and lowering of the blocking plug 203.
[0029] The end surface of the fan 4 close to the sampling pipe 102 is penetrated and fixed with an exhaust pipe 401. The exhaust pipe 401 and the sampling pipe 102 are connected with a quick plug connector 3.
[0030] The upper part of the outer periphery of the fan 4 is penetrated and fixed with an air outlet pipe two 403. The upper end of the air outlet pipe two 403 and the bottom end of the branch pipe two 103 are also connected with the quick plug connector 3.
[0031] The fan 4 can be detached. The exhaust pipe 401 at the exhaust end is connected with the sampling pipe 102 through the quick plug connector 3. The air outlet pipe two 403 at the air outlet end is connected with the branch pipe two 103 through the quick plug connector 3, which is convenient for dismounting and mounting.
[0032] The lower part of the outer periphery of the fan 4 is penetrated with an air outlet pipe one 402. The upper part of the rubber sleeve 501 is sleeved outside the lower end of the air outlet pipe one 402. The lower part of the rubber sleeve 501 is sleeved outside the tank opening of the collection tank 5. The upper and lower parts of the rubber sleeve 501 are both sleeved with a buckle 5011.
[0033] The outflow pipe one 402 is communicated with the collecting tank 5 through the rubber sleeve 501, a bundle ring 5011 is sleeved on the upper and lower parts of the rubber sleeve 501 for locking, so that smoke leakage is avoided during sampling, and after sampling is completed, the bundle ring 5011 is used to tighten the middle part of the rubber sleeve 501, so that smoke leakage is avoided, and after residual smoke in the discharge branch pipe one 101 and the sampling pipe 102 is discharged, the rubber sleeve 501 is separated from the outflow pipe one 402.
[0034] The inner diameters of the discharge branch pipe one 101, the discharge branch pipe two 103 and the sampling pipe 102 are sequentially reduced.
[0035] The specific working principle of the utility model is as follows: firstly, the smoke exhaust pipe 1 is connected with the discharge port of the boiler flue gas, the flue gas is transported out from the discharge branch pipe one 101 to the discharge branch pipe two 103, in the conventional state, the top of the discharge branch pipe one 101 is closed by the blocking plug 203, and the valve two 1031 on the discharge branch pipe two 103 is in the closed state;
[0036] During sampling, the suction pipe 401 at the suction end of the fan 4 is connected with the sampling pipe 102 through the quick plug connector 3, the outflow pipe two 403 at the outflow end is connected with the discharge branch pipe two 103 through the quick plug connector 3, the outflow pipe one 402 is communicated with the collecting tank 5 through the rubber sleeve 501, the shaft rod 2 is rotated through the hand wheel 201, the threaded section 202 at the lower part of the shaft rod 2 is threadedly connected with the bottom of the discharge branch pipe one 101, the shaft rod 2 is moved upwards to make the blocking plug 203 enter the smoke exhaust pipe 1, at this time, the smoke exhaust pipe 1 is communicated with the discharge branch pipe one 101, then the fan 4 works, negative pressure is generated at the suction pipe 401, the flue gas in the smoke exhaust pipe 1 is sucked into the discharge branch pipe one 101 and then into the sampling pipe 102 (in this state, the valve one 1021 is in the opened state, and the valve two 1031 is in the closed state), finally, the flue gas is guided out through the outflow pipe one 402, enters the collecting tank 5 through the rubber sleeve 501 to be collected, and the flue gas sample is obtained;
[0037] Finally, after the flue gas collection is completed, the bundle ring 5011 is used to tighten the middle part of the rubber sleeve 501, so that the flue gas does not leak, the shaft rod 2 is lowered to make the blocking plug 203 descend into the discharge branch pipe one 101 to block it, then the valve two 1031 is opened, the residual flue gas in the discharge branch pipe one 101 and the sampling pipe 102 is sucked by the fan 4 and discharged from the outflow pipe two 403, and flows back to the smoke exhaust pipe 1 through the discharge branch pipe two 103, until the residual flue gas in the discharge branch pipe one 101 and the sampling pipe 102 is discharged, the valve two 1031 is closed, the valve one 1021 is closed, the rubber sleeve 501 is separated from the outflow pipe one 402, the flue gas sample in the collecting tank 5 is obtained, and the sampling work is completed.
[0038] The above are only preferred embodiments of the present application, and do not limit the present application, any modification to the technical solutions recorded in the foregoing embodiments, equivalent replacement of part of the technical features, any modification, equivalent replacement, improvement made, all belong to the protection scope of the present application.
Claims
1. A flue gas sampling device for coal-fired power boilers, comprising a flue gas discharge pipe (1), a shaft rod (2), a quick connector (3), a fan (4) and a collection tank (5), characterized in that: The vertical branch pipe one (101) and the branch pipe two (103) are fixed through the lower part of the circumferential side of the smoke exhaust pipe (1), the lower part of the branch pipe two (103) is fixed with the valve two (1031), the lower part of the branch pipe one (101) is fixed through with the transversely arranged sampling pipe (102), the valve one (1021) is fixed on the sampling pipe (102), the shaft rod (2) is movably connected in the branch pipe one (101), the top end of the shaft rod (2) is fixed with the blocking plug (203), the fan (4) is arranged at the position where the vertical axis of the branch pipe two (103) and the horizontal axis of the sampling pipe (102) are staggered, the collecting tank (5) is arranged below the fan (4), the rubber sleeve (501) is sleeved on the tank opening of the collecting tank (5).
2. A flue gas sampling device for a coal-fired power plant boiler as claimed in claim 1, characterized in that: The bottom end of the shaft rod (2) is fixed with the hand wheel (201) and protrudes out through the bottom end of the branch pipe one (101), the lower part of the shaft rod (2) is provided with the threaded section (202), and the threaded section (202) is threadedly connected with the bottom of the branch pipe one (101), the upper part of the blocking plug (203) is cylindrical, and the lower part is inverse circular truncated cone structure.
3. A flue gas sampling device for a coal-fired power plant boiler as claimed in claim 1, characterized in that: The fan (4) is fixed through the end face of the sampling pipe (102) and is fixed through the end face of the sampling pipe (102), and the quick plug connector (3) is connected between the fan (4) and the sampling pipe (102).
4. A flue gas sampling device for a coal-fired power plant boiler as claimed in claim 1, characterized in that: The upper part of the outer circumference of the fan (4) is fixed through the air outlet pipe two (403), and the quick plug connector (3) is also connected between the upper end of the air outlet pipe two (403) and the bottom end of the branch pipe two (103).
5. A flue gas sampling device for a coal-fired power plant boiler as claimed in claim 1, characterized in that: The lower part of the outer circumference of the fan (4) is fixed through the air outlet pipe one (402), the upper part of the rubber sleeve (501) is sleeved outside the lower end of the air outlet pipe one (402), the lower part of the rubber sleeve (501) is sleeved outside the tank opening of the collecting tank (5), and the upper and lower parts of the rubber sleeve (501) are sleeved with the buckle ring (5011).
6. A flue gas sampling device for a coal-fired power plant boiler as claimed in claim 1, characterized in that: The inner diameters of the branch pipe one (101), the branch pipe two (103) and the sampling pipe (102) are sequentially reduced.