Steam boiler flue gas detection device

Abstract

The utility model relates to the technical field of flue gas detection, in particular to a flue gas detection device for a steam boiler. Comprising a gas inlet assembly, a temperature measuring assembly and a detection assembly, the gas inlet assembly comprises a connecting pipeline and a flange, the temperature measuring assembly comprises a temperature measuring box, the detection assembly comprises a flow dividing box and a smoke detector, a flow velocity sensor is arranged at the end, away from a temperature measuring instrument, of the temperature measuring box, and a gas guide pipe is connected to the lower bottom face of the temperature measuring box; the lower end of the air guide pipe is connected with a flow dividing pipe, a cooling fan is arranged on the inner side of the flow dividing box, the lower end of the flow dividing box is connected with a detection box, and the inner wall of the detection box is connected with an air collecting plate. After flue gas flows into the conveying pipe through the connecting pipeline, the flue gas in the conveying pipe flows into the temperature measuring box, the temperature of the flowing-in flue gas is detected through the temperature measuring instrument, and the temperature of the flue gas when the flue gas leaves the boiler is detected, so that reference data are obtained when flue gas heat recovery and boiler efficiency are evaluated.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas detection, in particular to a flue gas detection device for a steam boiler. Background Technique

[0002] Steam boilers can be classified into electric steam boilers, oil-fired steam boilers, gas-fired steam boilers, etc. according to the fuel; steam boilers can be classified into manually fired steam boilers and fully automatic chain-fired steam boilers according to the fuel supply method; according to the structure, they can be divided into vertical steam boilers and horizontal steam boilers. Small steam boilers are mostly single- or double-pass vertical structures, and large steam boilers are mostly three-pass horizontal structures.

[0003] A flue gas detection device for a steam boiler is a device used to monitor and measure the composition and parameters of the flue gas generated by the steam boiler to ensure the safety and efficiency of the boiler operation and comply with environmental regulations at the same time.

[0004] The negative pressure of the flue gas discharged from the boiler is relatively large. If it is directly introduced for detection, a large amount of flue gas will be introduced, which is not conducive to the detection of the flue gas, will cause a large deviation in the flue gas detection result, and at the same time, a large amount of flue gas is likely to cause the detection equipment to operate overload, affecting the service life of the equipment. Content of the Utility Model

[0005] Aiming at the above problems, the purpose of the utility model is to provide a flue gas detection device for a steam boiler, which solves the problems that when the negative pressure of the flue gas is relatively large and it is directly introduced for detection, it will cause a large deviation in the flue gas detection result, and at the same time, a large amount of flue gas is likely to cause the detection equipment to operate overload, affecting the service life of the equipment. Through the setting of the air guide pipe, it is used to transport the flue gas in the temperature measurement box into the shunt pipe. Through the setting of the shunt pipe, it is used to slow down the flow rate of the flue gas, thereby avoiding the influence of the too large flow rate of the flue gas on the detection data of the flue gas detector.

[0006] To achieve the above objectives, the technical solution adopted by the present utility model is as follows: A flue gas detection device for a steam boiler, comprising an intake assembly, a temperature measurement assembly, and a detection assembly. The intake assembly includes a connecting pipe and a flange. The temperature measurement assembly includes a temperature measurement box. The detection assembly includes a flow splitting box and a flue gas detector. One end of the connecting pipe is connected to an intake pipe, and the end of the connecting pipe far from the intake pipe is connected to a first exhaust pipe. The lower end of the connecting pipe is connected to a conveying pipe. The first exhaust pipe is connected to a valve. One end of the temperature measurement box is provided with a temperature measuring instrument, and the end of the temperature measurement box far from the temperature measuring instrument is provided with a flow velocity sensor. The lower bottom surface of the temperature measurement box is connected to a gas guide pipe, and the lower end of the gas guide pipe is connected to a flow splitting pipe. A cold air fan is arranged inside the flow splitting box. The lower end of the flow splitting box is connected to a detection box. A gas collecting plate is connected to the inner wall of the detection box, and a support plate is connected to the lower end of the gas collecting plate. One end of the detection box is connected to a second exhaust pipe. The wire of the temperature measuring instrument is installed inside the temperature measurement box through a clamp.

[0007] The beneficial effects of the present utility model are as follows: Through the setting of the gas guide pipe, it is used to convey the flue gas in the temperature measurement box into the flow splitting pipe. Through the setting of the flow splitting pipe, it is used to slow down the flow rate of the flue gas, thereby avoiding the influence of the too large flow rate of the flue gas on the detection data of the flue gas detector. Through the setting of the cold air fan, it is used to cool down the temperature of the flue gas in the flow splitting pipe. At the same time, the flow splitting pipe can increase the traveling path of the flue gas in the flow splitting box, thereby ensuring the effect of cooling the flue gas.

[0008] For the flue gas in the connecting pipe to be conveyed into the conveying pipe:

[0009] As a further improvement of the above technical solution: The connecting pipe is connected to the intake pipe through a flange, and the connecting pipe is connected to the first exhaust pipe through a flange. The end of the intake pipe far from the connecting pipe is connected to the steam boiler.

[0010] The beneficial effect of this improvement is as follows: Close the valve of the conveying pipe and open the valve of the first exhaust pipe. The flue gas generated by the steam boiler is conveyed into the connecting pipe through the intake pipe, and the flue gas in the connecting pipe is discharged through the first exhaust pipe. When performing flue gas detection, close the valve of the first exhaust pipe and open the valve of the conveying pipe, and the flue gas in the connecting pipe is conveyed into the conveying pipe.

[0011] For the temperature of the inflowing flue gas to be detected by the temperature measuring instrument:

[0012] As a further improvement of the above technical solution: The conveying pipe is provided with a valve. The end of the conveying pipe far from the connecting pipe penetrates through the top wall of the temperature measurement box and extends to the inside of the temperature measurement box. The probe of the temperature measuring instrument penetrates through the wall of the temperature measurement box and extends to the inside of the bottom of the conveying pipe.

[0013] The beneficial effects of this improvement are as follows: When the flue gas flows into the conveying pipe through the connecting pipe, the flue gas in the conveying pipe flows into the temperature measuring box, and the temperature measuring instrument is used to detect the temperature of the incoming flue gas. By detecting the temperature of the flue gas when it leaves the boiler, it can be used as reference data for evaluating flue gas heat recovery and boiler efficiency.

[0014] For monitoring the flow rate of the flue gas:

[0015] As a further improvement of the above technical solution: The probe of the flow rate sensor penetrates the wall of the temperature measuring box and extends to its inner side. A support frame for supporting it is arranged at the lower end of the probe of the flow rate sensor, and the probe of the flow rate sensor is located below the conveying pipe.

[0016] The beneficial effects of this improvement are as follows: Through the setting of the flow rate sensor, it is used to monitor the flow rate of the flue gas. By monitoring the flue gas flow rate, the dynamic characteristics of the boiler exhaust can be understood, and it can assist in adjusting the combustion system.

[0017] For slowing down the flow rate of the flue gas:

[0018] As a further improvement of the above technical solution: There are three cold fans in total, which are electrically connected to the operation panel. One end of the shunt pipe far from the air guide pipe penetrates the top wall of the detection box and extends to the inner side of the detection box.

[0019] The beneficial effects of this improvement are as follows: Through the setting of the air guide pipe, it is used to convey the flue gas in the temperature measuring box into the shunt pipe. Through the setting of the shunt pipe, it is used to slow down the flow rate of the flue gas, thereby avoiding the influence of excessive flue gas flow rate on the detection data of the flue gas detector. Through the setting of the cold fan, it is used to cool the temperature of the flue gas in the shunt pipe. At the same time, the shunt pipe can increase the traveling path of the flue gas in the shunt box, thereby ensuring the effect of cooling the flue gas.

[0020] For concentrating the flue gas flowing into the detection box between the two support plates:

[0021] As a further improvement of the above technical solution: There are two collecting plates and two support plates, which are symmetrically arranged. The two ends of the collecting plate are connected to the inner wall of the detection box, and one end of the collecting plate far from the support plate is connected to the inner wall of the detection box.

[0022] The beneficial effects of this improvement are as follows: Through the setting of the collecting plate, it is used to concentrate the flue gas flowing into the detection box between the two support plates, thereby facilitating the detection of the flue gas.

[0023] For the flue gas detector to detect the flue gas:

[0024] As a further improvement of the above technical solution: The probe of the flue gas detector is arranged between two support plates. The two ends of the support plate are connected to the inner wall of the detection box, and the lower end of the support plate is connected to the inner wall of the lower bottom surface of the detection box.

[0025] The beneficial effect of this improvement is that after the flue gas is collected by the gas collecting plate between the two support plates, the flue gas detector detects the flue gas. Through the arrangement of the support plates, it is used for fixing and supporting the gas collecting plate.

[0026] In order to discharge the flue gas that has completed the detection from the detection box:

[0027] As a further improvement of the above technical solution: The support columns are symmetrically connected to the lower bottom wall of the detection box. The top of the support column is connected to the lower end of the gas collecting plate. The second exhaust pipe is provided with a valve, and one end of the second exhaust pipe penetrates through the support plate and extends to the inside of the detection box.

[0028] The beneficial effect of this improvement is that through the arrangement of the support columns, it is used for fixing and supporting the gas collecting plate, thereby improving the stability of the connection between the gas collecting plate and the detection box. Through the arrangement of the second exhaust pipe, it is used to discharge the flue gas that has completed the detection from the detection box. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic main sectional structure view of the present utility model.

[0030] Figure 2 For Figure 1 The enlarged structure view at A in

[0031] Figure 3 For Figure 1 The enlarged structure view at B in

[0032] Figure 4 For Figure 1 The enlarged structure view at C in

[0033] Figure 5 It is a schematic structure view of the gas collecting plate of the present utility model.

[0034] In the figure: 1. Intake assembly; 11. Connecting pipe; 12. Inlet pipe; 13. First exhaust pipe; 14. Flange; 15. Valve; 16. Delivery pipe; 2. Temperature measuring assembly; 21. Temperature measuring box; 22. Temperature measuring instrument; 23. Clamp; 24. Flow velocity sensor; 25. Support frame; 26. Guide pipe; 3. Detection assembly; 31. Shunt box; 32. Shunt pipe; 33. Cold fan; 34. Detection box; 35. Gas collecting plate; 36. Support plate; 37. Flue gas detector; 38. Second exhaust pipe; 39. Support column. DETAILED DESCRIPTION OF THE INVENTION

[0035] To enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the present utility model.

[0036] As Figures 1-5As shown in the figure, a flue gas detection device for a steam boiler includes an intake assembly 1, a temperature measurement assembly 2, and a detection assembly 3. The intake assembly 1 includes a connecting pipe 11 and a flange 14. The temperature measurement assembly 2 includes a temperature measurement box 21. The detection assembly 3 includes a shunt box 31 and a flue gas detector 37. One end of the connecting pipe 11 is connected to an intake pipe 12. The end of the connecting pipe 11 away from the intake pipe 12 is connected to a first exhaust pipe 13. The lower end of the connecting pipe 11 is connected to a delivery pipe 16. The first exhaust pipe 13 is connected to a valve 15. One end of the temperature measurement box 21 is provided with a temperature measuring instrument 22. The end of the temperature measurement box 21 away from the temperature measuring instrument 22 is provided with a flow rate sensor 24. The lower bottom surface of the temperature measurement box 21 is connected to a gas guide pipe 26. The lower end of the gas guide pipe 26 is connected to a shunt pipe 32. A cold fan 33 is arranged inside the shunt box 31. The lower end of the shunt box 31 is connected to a detection box 34. A gas collecting plate 35 is connected to the inner wall of the detection box 34. The lower end of the gas collecting plate 35 is connected to a support plate 36. One end of the detection box 34 is connected to a second exhaust pipe 38. The wire of the temperature measuring instrument 22 is installed inside the temperature measurement box 21 through a clamp 23. The connecting pipe 11 is connected to the intake pipe 12 through a flange 14. The connecting pipe 11 is connected to the first exhaust pipe 13 through a flange 14. The end of the intake pipe 12 away from the connecting pipe 11 is connected to a steam boiler. Close the valve 15 of the delivery pipe 16 and open the valve 15 of the first exhaust pipe 13. The flue gas generated by the steam boiler is transported into the connecting pipe 11 through the intake pipe 12, and the flue gas in the connecting pipe 11 is discharged through the first exhaust pipe 13. When flue gas detection is carried out, close the valve 15 of the first exhaust pipe 13 and open the valve 15 of the delivery pipe 16. The flue gas in the connecting pipe 11 is transported into the delivery pipe 16. The delivery pipe 16 is provided with a valve 15. The end of the delivery pipe 16 away from the connecting pipe 11 penetrates through the top wall of the temperature measurement box 21 and extends to the inside of the temperature measurement box 21. The probe of the temperature measuring instrument 22 penetrates through the wall of the temperature measurement box 21 and extends to the inside of the bottom of the delivery pipe 16. When the flue gas flows from the connecting pipe 11 into the delivery pipe 16, the flue gas in the delivery pipe 16 flows into the temperature measurement box 21. The temperature measuring instrument 22 is used to detect the temperature of the flowing flue gas. By detecting the temperature of the flue gas when it leaves the boiler, it is used as reference data for evaluating flue gas heat recovery and boiler efficiency. The probe of the flow rate sensor 24 penetrates through the wall of the temperature measurement box 21 and extends to its inside. A support frame 25 for supporting it is arranged at the lower end of the probe of the flow rate sensor 24. The probe of the flow rate sensor 24 is located below the delivery pipe 16.Through the setting of the flow velocity sensor 24, it is used to monitor the flow velocity of the flue gas. By monitoring the flue gas flow velocity, it is used to understand the dynamic characteristics of the boiler flue gas discharge and can assist in adjusting the combustion system. There are three cold fans 33 in total, which are electrically connected to the operation panel. One end of the shunt pipe 32 far away from the gas guide pipe 26 penetrates the top wall of the detection box 34 and extends to the inside of the detection box 34. Through the setting of the gas guide pipe 26, it is used to transport the flue gas in the temperature measurement box 21 into the shunt pipe 32. Through the setting of the shunt pipe 32, it is used to slow down the flow rate of the flue gas, thereby avoiding the influence of excessive flue gas flow rate on the detection data of the flue gas detector 37. Through the setting of the cold fan 33, it is used to cool down the temperature of the flue gas in the shunt pipe 32. At the same time, the shunt pipe 32 can increase the traveling path of the flue gas in the shunt box 31, thereby ensuring the effect of cooling the flue gas. There are two collecting plates 35 and two support plates 36, which are symmetrically arranged. Both ends of the collecting plate 35 are connected to the inner wall of the detection box 34. One end of the collecting plate 35 far away from the support plate 36 is connected to the inner wall of the detection box 34. Through the setting of the collecting plate 35, it is used to concentrate the flue gas flowing into the detection box 34 and flow it between the two support plates 36, thereby facilitating the detection of the flue gas. The probe of the flue gas detector 37 is arranged at the position between the two support plates 36. Both ends of the support plate 36 are connected to the inner wall of the detection box 34. The lower end of the support plate 36 is connected to the inner wall of the bottom surface of the detection box 34. After the flue gas is collected between the two support plates 36 by the collecting plate 35, the flue gas detector 37 detects the flue gas. Through the setting of the support plate 36, it is used to fix and support the collecting plate 35. The bottom surface wall of the detection box 34 is symmetrically connected with support columns 39. The top of the support column 39 is connected to the lower end of the collecting plate 35. The second exhaust pipe 38 is provided with a valve 15. One end of the second exhaust pipe 38 penetrates the support plate 36 and extends to the inside of the detection box 34. Through the setting of the support column 39, it is used to fix and support the collecting plate 35, thereby improving the stability of the connection between the collecting plate 35 and the detection box 34. Through the setting of the second exhaust pipe 38, it is used to discharge the flue gas that has completed the detection from the detection box 34.;

[0037] The working principle of the utility model is as follows: during use, the valve 15 of the conveying pipe 16 is closed, and the valve 15 of the first exhaust pipe 13 is opened. The flue gas generated by the steam boiler is conveyed into the connecting pipe 11 through the intake pipe 12, and the flue gas in the connecting pipe 11 is discharged through the first exhaust pipe 13. When flue gas detection is carried out, the valve 15 of the first exhaust pipe 13 is closed, and the valve 15 of the conveying pipe 16 is opened. The flue gas in the connecting pipe 11 is conveyed into the conveying pipe 16. After the flue gas flows into the conveying pipe 16 through the connecting pipe 11, the flue gas in the conveying pipe 16 flows into the temperature measurement box 21, and the temperature of the incoming flue gas is detected by the temperature measuring instrument 22. By detecting the temperature of the flue gas when it leaves the boiler, it is used as reference data for evaluating flue gas heat recovery and boiler efficiency. Through the setting of the flow velocity sensor 24, it is used to monitor the flow velocity of the flue gas. By monitoring the flue gas flow velocity, the dynamic characteristics of the boiler exhaust can be understood, and the combustion system can be assisted in adjustment. Through the setting of the air guide pipe 26, it is used to convey the flue gas in the temperature measurement box 21 into the shunt pipe 32. Through the setting of the shunt pipe 32, it is used to slow down the flow rate of the flue gas, thereby avoiding the influence of excessive flue gas flow rate on the detection data of the flue gas detector 37. Through the setting of the cold fan 33, it is used to cool down the temperature of the flue gas in the shunt pipe 32. At the same time, the shunt pipe 32 can increase the traveling path of the flue gas in the shunt box 31, thereby ensuring the effect of cooling the flue gas. Through the setting of the gas collecting plate 35, it is used to concentrate the flue gas flowing into the detection box 34 and flow it between the two support plates 36, thereby facilitating the detection of the flue gas. After the flue gas is collected by the gas collecting plate 35 and flows between the two support plates 36, the flue gas detector 37 detects the flue gas. Through the setting of the support plate 36, it is used to fix and support the gas collecting plate 35. Through the setting of the support column 39, it is used to fix and support the gas collecting plate 35, thereby improving the stability of the connection between the gas collecting plate 35 and the detection box 34. Through the setting of the second exhaust pipe 38, it is used to discharge the flue gas that has completed detection from the detection box 34. The model of the flue gas detector 37 is JK50 - YQ, and the flue gas detector 37 achieves the purpose of measuring and analyzing the components of the flue gas generated during the industrial combustion process. The model of the temperature measuring instrument 22 is MIK - R4000D, and the temperature measuring instrument 22 achieves the purpose of measuring temperature. The model of the flow velocity sensor 24 is DN - 32, and the flow velocity sensor 24 achieves the purpose of measuring the gas flow velocity. And the relevant principles involved in this structure are publicly known prior arts. The components are all common standard parts or parts known to those skilled in the art, and their structures and principles can all be learned by those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0038] It should be noted that in this text, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0039] In this text, specific examples are used to elaborate on the principles and implementation manners of the present utility model. The description of the above examples is only used to help understand the method and its core idea of the present utility model. The above is only the preferred implementation manner of the present utility model. It should be noted that due to the limitation of literal expression, objectively there are infinite specific structures. For those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the utility model to other occasions without improvement, shall all be regarded as the protection scope of the present utility model.

Claims

1. A steam boiler smoke detection device, comprising an air intake component (1), a temperature measurement component (2), and a detection component (3), wherein the air intake component (1) comprises a connecting pipe (11) and a flange (14), the temperature measurement component (2) comprises a temperature measurement box (21), and the detection component (3) comprises a shunt box (31) and a smoke detector (37), characterized in that: One end of the connecting pipe (11) is connected to an air intake pipe (12), one end of the connecting pipe (11) away from the air intake pipe (12) is connected to a first exhaust pipe (13), the lower end of the connecting pipe (11) is connected to a delivery pipe (16), the first exhaust pipe (13) is connected to a valve (15), one end of the temperature measuring box (21) is provided with a temperature measuring instrument (22), one end of the temperature measuring box (21) away from the temperature measuring instrument (22) is provided with a flow rate sensor (24), and the lower bottom surface of the temperature measuring box (21) is connected to a guide pipe (24). An air pipe (26), the lower end of the air guide pipe (26) is connected to a shunt pipe (32), a cooling fan (33) is arranged on the inner side of the shunt box (31), the lower end of the shunt box (31) is connected to a detection box (34), the inner wall of the detection box (34) is connected to an air collecting plate (35), the lower end of the air collecting plate (35) is connected to a support plate (36), one end of the detection box (34) is connected to a second exhaust pipe (38), and the wire of the temperature measuring instrument (22) is installed on the inner side of the temperature measuring box (21) through a clamp (23).

2. A steam boiler smoke detection device according to claim 1, characterized in that: The connecting pipe (11) is connected to the air inlet pipe (12) via a flange (14), the connecting pipe (11) is connected to the first exhaust pipe (13) via a flange (14), and one end of the air inlet pipe (12) away from the connecting pipe (11) is connected to the steam boiler.

3. A steam boiler smoke detection device according to claim 1, characterized in that: The delivery pipe (16) is provided with a valve (15); one end of the delivery pipe (16) away from the connecting pipe (11) passes through the top wall of the temperature measuring box (21) and extends to the inner side of the temperature measuring box (21); and the probe of the temperature measuring instrument (22) passes through the wall of the temperature measuring box (21) and extends to the inner side of the bottom of the delivery pipe (16).

4. A steam boiler smoke detection device according to claim 1, characterized in that: The probe of the flow velocity sensor (24) penetrates the wall of the temperature measuring box (21) and extends to the inner side thereof. A support frame (25) for supporting the probe of the flow velocity sensor (24) is provided at the lower end of the probe of the flow velocity sensor (24). The probe of the flow velocity sensor (24) is located below the conveying pipe (16).

5. A steam boiler smoke detection device according to claim 1, characterized in that: There are three cooling fans (33) in total and they are electrically connected to the operation panel. One end of the diverter pipe (32) away from the air duct (26) penetrates the top wall of the detection box (34) and extends to the inner side of the detection box (34).

6. A steam boiler smoke detection device according to claim 1, characterized in that: The gas collecting plate (35) and the supporting plate (36) are both in two pieces and are symmetrically arranged. The two ends of the gas collecting plate (35) are connected to the inner wall of the detection box (34), and the end of the gas collecting plate (35) away from the supporting plate (36) is connected to the inner wall of the detection box (34).

7. A steam boiler smoke detection device according to claim 1, characterized in that: The probe of the smoke detector (37) is arranged between two support plates (36), the two ends of the support plates (36) are connected to the inner wall of the detection box (34), and the lower end of the support plate (36) is connected to the inner wall of the lower bottom surface of the detection box (34).

8. A steam boiler smoke detection device according to claim 1, characterized in that: The lower bottom wall of the detection box (34) is symmetrically connected to a support column (39), the top of the support column (39) is connected to the lower end of the gas collecting plate (35), the second exhaust pipe (38) is provided with a valve (15), and one end of the second exhaust pipe (38) passes through the support plate (36) and extends to the inner side of the detection box (34).

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