Boiler tail gas monitoring device

Abstract

The utility model discloses a boiler tail gas monitoring device, which relates to the technical field of tail gas monitoring and comprises a monitoring box body, a pretreatment assembly is arranged in the monitoring box body and comprises a cooling box, a cyclone separator, a mixing box and a second suction fan, and a cooling tank and a tail gas tank are arranged in the cooling box. A cooling liquid is arranged in the cooling tank and located on the outer side of the tail gas tank, a heat exchange assembly is arranged above the cooling tank, and an air inlet of the second suction fan is connected with the tail gas tank through a second connecting pipe. According to the boiler tail gas analyzer, the tail gas is cooled through the cooling liquid in the cooling box, the cooling liquid is subjected to heat exchange recycling through the heat exchange assembly, an internal sample is pumped out to the cyclone separator after a proper temperature is reached, particles in the sample are centrifugally separated through the cyclone separator, impurities are prevented from being carried into the boiler tail gas analyzer, and the detection precision is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tail gas monitoring technical field especially relates to a boiler tail gas monitoring device. BACKGROUND

[0002] The boiler tail gas monitoring device is important equipment for real-time monitoring of various pollutants in the boiler tail gas, mainly for monitoring SO2, NOx, CO, CO2 and other pollutants in the tail gas.

[0003] A kind of boiler operation tail gas monitoring device (CN209689996U) can be referred to existing literature, reference literature is driven by suction fan, and then the tail gas in tail gas chimney is absorbed by suction hood, from the air outlet of suction fan, so that the tail gas is left in the inside of hollow block, the tail gas in the inside of hollow block is detected by tail gas detector, so that the result of detection is transported to computer by central processing unit, so that workers can be better kept away from tail gas, reduce the personal safety of worker, and boiler tail gas can be detected in real time simultaneously.

[0004] The boiler tail gas is high in temperature when discharging, if sample is directly extracted from tail gas discharge port according to the above-mentioned literature, high-temperature tail gas directly enters into detection equipment, which will affect the performance of sampling equipment, and the sampling tube, sensor and other components may be deformed, aged or failed in high-temperature environment, thereby affecting the measurement accuracy and reliability, and the above-mentioned literature filters the particulate impurities in the tail gas by filter screen, which is easy to cause the filter screen to be blocked, and then the filter screen needs to be cleaned and replaced regularly, thereby increasing the subsequent workload. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the shortcomings in the prior art and provides a boiler tail gas monitoring device. The utility model first draws the boiler tail gas into the cooling box, knows the tail gas temperature by observing the data of temperature display instrument, cools the tail gas by the cooling liquid in the cooling box, and circulates and uses the cooling liquid by heat exchange assembly, draws the internal sample out of the cyclone separator after reaching the appropriate temperature, centrifugally separates the particulate in the sample by the cyclone separator, prevents the impurities from being carried into the boiler tail gas analyzer, and improves the detection accuracy.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A boiler tail gas monitoring device, comprising: a monitoring box, a pretreatment assembly is arranged in the monitoring box, the pretreatment assembly comprises a cooling box, a cyclone separator, a mixing box and a second air suction fan, a cooling tank and a tail gas tank are arranged in the cooling box, cooling liquid is arranged in the cooling tank and outside the tail gas tank, a heat exchange assembly is arranged above the cooling box, the air inlet of the second air suction fan is connected with the tail gas tank through a connecting pipe two, the air outlet of the second air suction fan is connected with the air inlet of the cyclone separator through a second gas conveying pipe, and the mixing box is arranged at the bottom of the cyclone separator and communicates with the inside of the cyclone separator.

[0008] The utility model further sets up that the inside right side of monitoring box is fixedly installed with a first air suction fan, the air inlet of first air suction fan is connected with the air suction head of a gas conveying pipe, and the air suction head is arranged outside the monitoring box.

[0009] The utility model further sets up that the air outlet of first air suction fan is connected with the tail gas tank through a connecting pipe one, and the front of cooling box is provided with a water inlet, and the water inlet communicates with the cooling tank.

[0010] The utility model further sets up that the heat exchange assembly comprises: a liquid pumping pump and a plate-fin heat exchanger, which are fixedly installed above the cooling box, the water inlet of liquid pumping pump is connected with the cooling tank through a first liquid pumping pipe, the water outlet of liquid pumping pump is connected with the water inlet of plate-fin heat exchanger, and the water outlet of plate-fin heat exchanger is connected with the cooling tank through a second liquid pumping pipe.

[0011] The utility model further sets up that the top of cooling box is provided with a temperature sensor, the probe of temperature sensor is inserted into the tail gas tank, and the top of temperature sensor is connected with a temperature display instrument.

[0012] The utility model further sets up that the air outlet of cyclone separator is connected with the sampling port of boiler tail gas analyzer, and the boiler tail gas analyzer is fixedly installed in the inside of monitoring box.

[0013] The utility model further sets up that the right side of mixing box is connected with a first liquid discharging pipe, the first liquid discharging pipe extends into the cooling tank, and the front end of mixing box is provided with a second liquid discharging pipe.

[0014] The utility model has the advantages that:

[0015] 1、 the boiler tail gas monitoring device can send the tail gas drawn into the cooling tank first, the internal tail gas is cooled by the cooling liquid in the cooling tank, the cooling liquid can be recycled by the heat exchange assembly during use, and the internal tail gas temperature can be known by observing the value of the temperature display instrument, so that the tail gas can be discharged from the cooling tank when the temperature reaches the appropriate temperature, and the influence of the high temperature of the tail gas on the detection instrument is avoided.

[0016] 2, the cooled tail gas is sucked into the cyclone separator by the No. 2 suction fan, and the gas-solid centrifugal separation is carried out by the cyclone separator, the particles with large density sink downward into the mixing box, and the cooling liquid in the cooling box can be discharged into the mixing box after cooling, the impurities are mixed with the cooling liquid and then discharged, and this separation method does not need to replace the filter screen for many times, thereby reducing the subsequent workload. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the boiler tail gas monitoring device.

[0018] Figure 2 It is a pretreatment assembly structure schematic view of the boiler tail gas monitoring device.

[0019] Figure 3 It is a cooling box internal structure schematic view of the boiler tail gas monitoring device. Figure 2 of the boiler tail gas monitoring device.

[0020] Figure 4 It is a cooling box internal structure schematic view of the boiler tail gas monitoring device.

[0021] In the figure: 1, monitoring box; 2, No. 1 suction fan; 3, No. 1 gas conveying pipe; 4, suction head; 5, cooling box; 6, connecting pipe one; 7, boiler tail gas analyzer; 8, cyclone separator; 9, mixing box; 10, No. 2 suction fan; 11, liquid pumping pump; 12, No. 1 liquid pumping pipe; 13, plate-fin heat exchanger; 14, No. 2 liquid pumping pipe; 15, temperature sensor; 16, temperature display instrument; 17, connecting pipe two; 18, liquid discharge pipe one; 19, liquid discharge pipe two; 20, No. 2 gas conveying pipe; 21, cooling tank; 22, tail gas tank; 23, water inlet. DETAILED DESCRIPTION

[0022] The technical scheme of the patent will be further described in detail in combination with specific implementation manners.

[0023] The embodiments of the patent will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the patent, and cannot be understood as a limitation on the patent.

[0024] In the description of the present patent, it needs to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present patent and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present patent.

[0025] In the description of the present patent, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting" should be understood broadly, for example, it can be fixedly connected, set, or it can be detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meaning of the above terms in the present patent can be understood according to the specific circumstances.

[0026] Reference Figures 1-4 A boiler exhaust gas monitoring device, comprising: a monitoring box 1, a built-in No. 1 air suction fan 2 and a pretreatment assembly in the monitoring box 1, the air inlet of the No. 1 air suction fan 2 is connected with the air suction head 4 through the No. 1 gas conveying pipe 3, the air suction head 4 is arranged on the outside of the monitoring box 1 to sample the boiler exhaust gas discharge port, the No. 1 air suction fan 2 guides the sampled sample into the pretreatment assembly for cooling and filtering treatment, and the treated sample enters the boiler exhaust gas analyzer 7 for component analysis.

[0027] The boiler exhaust gas analyzer 7 is an existing device, which can detect various gas components in the boiler exhaust gas, such as nitrogen oxides, sulfur dioxide, oxygen, carbon monoxide, etc. Specific products such as Detuo testo series flue gas analyzer, Jingwei boiler exhaust gas analyzer, etc. are common brands and products in the market.

[0028] Specifically, as shown in Figure 2 The pretreatment assembly includes a cooling box 5, a cyclone separator 8, a mixing box 9 and a No. 2 air suction fan 10.

[0029] Further, the cooling box 5 is divided into a cooling tank 21 and an exhaust tank 22, the cooling tank 21 is built-in with cooling liquid, and the exhaust tank 22 is arranged inside the cooling tank 21.

[0030] Specifically, the air outlet of the No. 1 air suction fan 2 is connected with the exhaust tank 22 through the connecting pipe 6, the exhaust gas is first sent into the exhaust tank 22, and a one-way valve is arranged on the connecting pipe 6, which is closed during the cooling process.

[0031] Specifically, as shown in Figures 2-3As shown, the front end of the cooling box 5 is provided with a water inlet 23 which is communicated with the cooling tank 21, and the upper part of the cooling box 5 is provided with a heat exchange assembly which comprises a liquid pumping pump 11 and a plate-fin heat exchanger 13.

[0032] Further, the water inlet of the liquid pumping pump 11 is connected with the cooling tank 21 through a first liquid pumping pipe 12, the water outlet of the liquid pumping pump 11 is connected with the water inlet of the plate-fin heat exchanger 13, and the water outlet of the plate-fin heat exchanger 13 is connected with the cooling tank 21 through a second liquid pumping pipe 14.

[0033] In this embodiment, the cooling liquid in the cooling tank 21 is pumped into the plate-fin heat exchanger 13 by the liquid pumping pump 11, the plate-fin heat exchanger 13 performs heat exchange treatment on the cooling liquid, and the cooled cooling liquid is introduced into the cooling tank 21 again for use.

[0034] Therefore, the sample in the tail gas tank 22 is cooled in the continuous circulation of the cooling liquid.

[0035] Further, a temperature sensor 15 is arranged above the cooling box 5, the probe of the temperature sensor 15 is inserted into the tail gas tank 22 to monitor the temperature of the sample, and the signal is transmitted to a temperature display instrument 16 for numerical display, so that the real-time temperature can be known by observing the temperature display instrument 16, and the sample can be discharged when the temperature is reduced to a suitable temperature.

[0036] Specifically, the air inlet of the second air suction fan 10 is connected with the tail gas tank 22 through a connecting pipe 2 17, and a one-way valve is arranged on the connecting pipe 2 17, and the valve is closed during the cooling process.

[0037] Further, the air outlet of the second air suction fan 10 is connected with the air inlet of the cyclone separator 8 through a second gas conveying pipe 20, and the mixing box 9 is arranged at the bottom of the cyclone separator 8 and communicated with the inside of the cyclone separator 8.

[0038] In this embodiment, the cooled tail gas is introduced into the cyclone separator 8 through the second gas conveying pipe 20, and the gas-solid centrifugal separation is performed through the cyclone separator 8, the particles with large density will sink downward, and the gas will be discharged to the boiler tail gas analyzer 7 through the air outlet, so that the cooled and filtered sample enters into the boiler tail gas analyzer 7 for detection.

[0039] The cooling box 5 and the mixing box 9 are both transparently designed, so that the liquid level and turbidity in the inside can be observed in real time.

[0040] Specifically, as shown in Figures 2-3 The front end of the mixing box 9 is provided with a second liquid discharge pipe 19, the right side of the mixing box 9 is provided with a first liquid discharge pipe 18, the first liquid discharge pipe 18 is connected to the cooling tank 21, and the one-way valves are arranged on the first liquid discharge pipe 18 and the second liquid discharge pipe 19.

[0041] In this embodiment, the particulate impurities separated by the cyclone separator 8 will enter the mixing tank 9, before entering, the valve on the liquid discharge pipe 18 can be opened first, part of the cooling liquid is introduced into the mixing tank 9, so that the separated particulate impurities are mixed with the cooling liquid, then the valve on the liquid discharge pipe 19 is opened to concentrate the turbid liquid.

[0042] Working principle: when using the utility model, the tail gas drawn in will be sent into the cooling tank 5 first, the internal tail gas is cooled by the cooling liquid in the cooling tank 5, the cooling liquid can be heat exchanged and recycled by the heat exchange assembly during use, the staff can know the internal tail gas temperature by observing the value of the temperature display instrument 16, when the temperature reaches the appropriate temperature, the tail gas is discharged from the cooling tank 5, which effectively avoids the influence of high temperature tail gas on the detection instrument, the cooled tail gas is drawn into the cyclone separator 8 by the No. 2 air suction fan 10, the gas-solid centrifugal separation is carried out by the cyclone separator 8, the particulate matter with larger density is settled downward into the mixing tank 9, and the cooling liquid in the cooling tank 5 can be discharged into the mixing tank 9 after cooling, the impurities are mixed with the cooling liquid and then discharged, this separation method does not need to replace the filter screen many times, thereby reducing the subsequent workload.

[0043] The above is only the preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A boiler flue gas monitoring device comprising: The utility model provides a monitoring box (1), its characterized in be provided with preprocessing assembly inside the monitoring box (1), and preprocessing assembly includes cooling box (5), cyclone (8), mixing box (9) and no.

2. A boiler flue gas monitoring device according to claim 1, characterised in that, The utility model provides a monitoring box (1), its characterized in be provided with preprocessing assembly inside the monitoring box (1), and preprocessing assembly includes cooling box (5), cyclone (8), mixing box (9) and no.

3. A boiler flue gas monitoring device according to claim 2, characterised in that, The utility model provides a monitoring box (1), its characterized in be provided with preprocessing assembly inside the monitoring box (1), and preprocessing assembly includes cooling box (5), cyclone (8), mixing box (9) and no.

4. A boiler flue gas monitoring device according to claim 1, characterised in that, The utility model provides a monitoring box (1), its characterized in be provided with preprocessing assembly inside the monitoring box (1), and preprocessing assembly includes cooling box (5), cyclone (8), mixing box (9) and no. The utility model provides a monitoring box (1), its characterized in be provided with preprocessing assembly inside the monitoring box (1), and preprocessing assembly includes cooling box (5), cyclone (8), mixing box (9) and no.

5. A boiler flue gas monitoring device according to claim 1, characterised in that, The utility model provides a monitoring box (1), its characterized in be provided with preprocessing assembly inside the monitoring box (1), and preprocessing assembly includes cooling box (5), cyclone (8), mixing box (9) and no.

6. A boiler flue gas monitoring device according to claim 1, characterised in that, The utility model provides a monitoring box (1), its characterized in be provided with preprocessing assembly inside the monitoring box (1), and preprocessing assembly includes cooling box (5), cyclone (8), mixing box (9) and no.

7. A boiler flue gas monitoring device according to claim 1, characterised in that, The utility model provides a monitoring box (1), its characterized in be provided with preprocessing assembly inside the monitoring box (1), and preprocessing assembly includes cooling box (5), cyclone (8), mixing box (9) and no. The utility model provides a monitoring box (1), its characterized in be provided with preprocessing assembly inside the monitoring box (1), and preprocessing assembly includes cooling box (5), cyclone (8), mixing box (9) and no. The utility model provides a monitoring box (1), its characterized in be provided with preprocessing assembly inside the monitoring box (1), and preprocessing assembly includes cooling box (5), cyclone (8), mixing box (9) and no. 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