COon-line monitoring device for gas monitoring of ship tail gas decarburization system

Abstract

The utility model discloses a CO2 on-line monitoring device for gas monitoring of a ship tail gas decarburization system, and belongs to the technical field of ship tail gas monitoring. A CO2 on-line monitoring device for gas monitoring of a ship tail gas decarburization system comprises a monitoring box body and further comprises a dehydrator, a gas inlet, a gas outlet, a gas inlet, a gas outlet, a gas inlet and a gas outlet, and the input end of the dehydrator is communicated with a sample gas inlet; the input end of the gas filter is communicated with the output end of the dehydrator; the output end of the gas filter is communicated with the input end of the condenser through a gas sampling pump; the carbon dioxide analyzer is fixedly arranged in the monitoring box body; by adopting the dehydrator and the condenser, water vapor in the sample gas can be treated, and then tiny dust substances such as carbon powder and the like entrained in the sample gas can be removed by adopting the filter, so that the water vapor in the sample gas can be prevented from increasing the detection error and damaging an optical element; and adverse effects on the detection result and the service life of the instrument can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of ship exhaust gas monitoring, in particular to a CO2 online monitoring device for gas monitoring of a ship exhaust gas decarbonization system. Background Art

[0002] The problem of climate change has become a common problem faced by mankind. How to effectively solve the problem of carbon dioxide emissions has attracted wide attention. Among them, carbon dioxide capture, utilization and storage (CCUS) has become one of the indispensable key technologies. The ship decarbonization system is exactly one of the technical solutions of carbon dioxide capture, utilization and storage (CCUS). The CO2 online monitoring device is one of the equipment in the ship decarbonization system and is used for measuring the CO2 content before and after treatment in the exhaust gas.

[0003] In the use of the existing monitoring device, the pretreatment effect of the sample gas to be monitored is poor. When the sample gas contains water vapor, it is easy to cause an increase in error, and at the same time, it may also cause damage to the optical elements. At the same time, there are many different types of organic solvents, adhesives, toner and other substances in the sample gas, and such interfering substances may affect the detection result and the service life of the instrument. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem in the prior art that the pretreatment effect of the sample gas is poor, resulting in the sample gas containing water vapor and other substances, which is easy to increase the monitoring error and affect the detection result and the service life of the instrument, and to propose a CO2 online monitoring device for gas monitoring of a ship exhaust gas decarbonization system.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A CO2 online monitoring device for gas monitoring of a ship exhaust gas decarbonization system includes a monitoring box body, on which a control unit is fixedly arranged, and further includes: a water eliminator fixedly arranged in the monitoring box body, a sample gas inlet fixedly arranged on the monitoring box body, and the input end of the water eliminator is communicated with the sample gas inlet; a gas filter, the input end of the gas filter is communicated with the output end of the water eliminator; a condenser fixedly arranged in the monitoring box body, the output end of the gas filter is communicated with the input end of the condenser through a gas sampling pump; a carbon dioxide analyzer fixedly arranged in the monitoring box body, and the input end of the carbon dioxide analyzer is communicated with the output end of the condenser.

[0007] Preferably, in order to further dry the sample gas, a gas drying tube is further included. One end of the gas drying tube is communicated with the output end of the condenser through an inlet pipe, and the other end of the gas drying tube is communicated with the input end of the carbon dioxide analyzer through an outlet pipe, and valves are fixedly arranged on both the inlet pipe and the outlet pipe.

[0008] For the convenience of cleaning the gas drying tube, further, a purging gas inlet is fixedly arranged at one end of the gas drying tube close to the gas outlet pipe, a purging gas outlet is fixedly arranged at one end of the gas drying tube close to the gas inlet pipe, and valves are fixedly arranged on both the purging gas inlet and the purging gas outlet.

[0009] For the convenience of cleaning the sample gas inlet, preferably, a back purging gas inlet is fixedly arranged on the monitoring box body, and the back purging gas inlet is communicated with the sample gas inlet through a valve.

[0010] Preferably, a gas chamber is fixedly arranged on the carbon dioxide analyzer, a pressure sensor is fixedly arranged on the gas chamber, a sample gas outlet is fixedly arranged at the output end of the gas chamber, a standard gas inlet is fixedly arranged on the monitoring box body, and the standard gas inlet is communicated with the input end of the gas chamber through a valve.

[0011] Preferably, a liquid extraction pump is fixedly arranged in the monitoring box body. One end of the liquid extraction pump is communicated with the water remover through a solenoid valve, and the other end of the liquid extraction pump is fixedly provided with a liquid outlet.

[0012] Preferably, it further includes a sampling probe for collecting gas. A filter element is fixedly arranged at the input end of the sampling probe. An exhaust pipe and a back flushing pipe are fixedly arranged on the sampling probe. The exhaust pipe is communicated with the sample gas inlet, and valves are fixedly arranged on both the exhaust pipe and the back flushing pipe.

[0013] Compared with the prior art, the present utility model provides a CO2 on-line monitoring device for gas monitoring in a ship exhaust gas decarbonization system, and has the following beneficial effects:

[0014] 1. The CO2 on-line monitoring device for gas monitoring in a ship exhaust gas decarbonization system can process the water vapor in the sample gas by adopting a water remover and a condenser, and then can remove tiny dust-like substances such as carbon powder entrained in the sample gas by adopting a filter, which can avoid the increase of detection error caused by the water vapor in the sample gas and damage to optical elements; it can also prevent adverse effects on the detection result and the service life of the instrument.

[0015] 2. The CO2 on-line monitoring device for gas monitoring in a ship exhaust gas decarbonization system can further dehumidify and dry the sample gas after condensation treatment by arranging a gas drying tube at the output end of the condenser, and the drying effect of the sample gas is better, ensuring that the humidity of the sample gas meets the humidity requirement of the carbon dioxide analyzer for the detected gas.

[0016] The parts not involved in this device are the same as the prior art or can be implemented using the prior art. By adopting a water eliminator and a condenser, this utility model can process the water vapor in the sample gas. Then, by using a filter, tiny dust-like substances such as carbon powder entrained in the sample gas can be removed, which can avoid an increase in detection errors caused by water vapor in the sample gas and damage to optical components; it can also prevent adverse effects on the detection results and the service life of the instrument. Brief Description of the Drawings

[0017] Figure 1 Structural schematic of a CO2 on-line monitoring device for gas monitoring in a ship exhaust gas decarbonization system proposed by this utility model Figure 1 ;

[0018] Figure 2 Structural schematic of a CO2 on-line monitoring device for gas monitoring in a ship exhaust gas decarbonization system proposed by this utility model Figure 2 ;

[0019] Figure 3 Structural schematic diagram of a sampling probe of a CO2 on-line monitoring device for gas monitoring in a ship exhaust gas decarbonization system proposed by this utility model;

[0020] Figure 4 Cross-sectional view of a CO2 on-line monitoring device for gas monitoring in a ship exhaust gas decarbonization system proposed by this utility model.

[0021] In the figure: 1, monitoring box; 101, control unit; 2, gas sampling pump; 3, gas drying tube; 301, intake pipe; 302, outlet pipe; 303, purge gas inlet; 304, purge gas outlet; 4, condenser; 5, carbon dioxide analyzer; 501, sample gas outlet; 6, gas filter; 7, water eliminator; 701, sample gas inlet; 702, backflush gas inlet; 8, sampling probe; 801, filter element; 802, exhaust pipe; 803, backflush pipe; 9, pressure sensor; 10, gas chamber; 11, liquid outlet; 12, solenoid valve; 13, liquid pumping pump; 14, peristaltic pump; 15, standard gas inlet; 16, condensate outlet. Detailed Embodiment

[0022] Next, the technical solutions in the embodiments of this utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, rather than all of the embodiments.

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0024] Embodiment:

[0025] Referring to Figures 1 - 4 , a CO2 on-line monitoring device for gas monitoring in a ship exhaust gas decarbonization system, comprising a monitoring box body 1, a control unit 101 is fixedly arranged on the outer wall of the monitoring box body 1, and further comprising: a water remover 7, fixedly arranged in the monitoring box body 1, a float switch and a liquid level gauge are arranged in the water remover 7 to facilitate the monitoring of the liquid content in the water remover 7. A sample gas inlet 701 is fixedly arranged on the monitoring box body 1, and the input end of the water remover 7 is connected to the sample gas inlet 701 through a valve; a gas filter 6, the input end of the gas filter 6 is connected to the output end of the water remover 7, and the gas filter 6 can effectively remove fine dust substances such as carbon powder, making the sample gas cleaner and preventing the probe of the carbon dioxide analyzer 5 from being blocked and damaged; a condenser 4, fixedly arranged in the monitoring box body 1, the output end of the gas filter 6 is connected to the input end of the condenser 4 through a gas sampling pump 2, and a peristaltic pump 14 is fixedly arranged in the monitoring box body 1. One end of the peristaltic pump 14 is connected to the condenser 4 through a valve, and a condensate outlet 16 is fixedly arranged at the other end of the peristaltic pump 14. During use, through the peristaltic pump 14, the liquid in the condenser 4 can be pumped out and then discharged through the condensate outlet 16; a carbon dioxide analyzer 5 fixedly arranged in the monitoring box body 1, the input end of the carbon dioxide analyzer 5 is connected to the output end of the condenser 4. During use, the sample gas enters the water remover 7 through the sample gas inlet 701, and the liquid entrained in the sample gas is removed by gravity. Then, the sample gas passes through the gas filter 6 to remove fine dust substances such as carbon powder entrained in the sample gas. Then, the pre-treated sample gas containing a certain humidity is sent into the condenser 4 through the gas sampling pump 2 for further condensation and drying treatment. The treated gas is sent into the gas chamber 10. Finally, the carbon dioxide analyzer 5 can detect the content of CO2 in the sample gas, which can avoid the increase of detection error caused by water vapor in the sample gas and damage to optical elements; it can also reduce fine dust substances such as carbon powder entrained in the sample gas, further preventing adverse effects on the detection result and the service life of the instrument.

[0026] Referring to Figure 4, An on-line CO2 monitoring device for gas monitoring in a ship exhaust gas decarbonization system, further comprising a gas drying tube 3. One end of the gas drying tube 3 is connected to the output end of the condenser 4 through an intake pipe 301, and the other end of the gas drying tube 3 is connected to the input end of the carbon dioxide analyzer 5 through an outlet pipe 302, that is, connected to the input end of the gas chamber 10. Valves are fixedly arranged on both the intake pipe 301 and the outlet pipe 302. During use, by arranging the gas drying tube 3 at the output end of the condenser 4, the sampled gas after condensation treatment is dehumidified and dried again, and the drying effect of the sampled gas is better, ensuring that the humidity of the sampled gas meets the humidity requirements of the carbon dioxide analyzer 5 for the gas to be detected.

[0027] Refer to Figure 4 , A purge gas inlet 303 is fixedly arranged at one end of the gas drying tube 3 close to the outlet pipe 302, and a purge gas outlet 304 is fixedly arranged at one end of the gas drying tube 3 close to the intake pipe 301. Valves are fixedly arranged on both the purge gas inlet 303 and the purge gas outlet 304. During use, by fixedly arranging the purge gas inlet 303 and the purge gas outlet 304 on the gas drying tube 3, the inside of the gas drying tube 3 can be purged regularly. The purge gas can be instrument-quality air (dew point up to -40°C) or nitrogen.

[0028] Refer to Figure 1 and Figure 4 , A back purge gas inlet 702 is fixedly arranged on the monitoring box 1. The back purge gas inlet 702 is connected to the sampled gas inlet 701 through a valve. During use, by closing the valve on the input end of the water separator 7 and opening the valve on the back purge gas inlet 702, and introducing the purified gas into the back purge gas inlet 702, the sampled gas inlet 701 can be purged to prevent the sampled gas inlet 701 from being blocked and affecting the use effect.

[0029] Refer to Figure 4 , A gas chamber 10 is fixedly arranged on the carbon dioxide analyzer 5. A pressure sensor 9 is fixedly arranged on the gas chamber 10. A sampled gas outlet 501 is fixedly arranged at the output end of the gas chamber 10. A standard gas inlet 15 is fixedly arranged on the monitoring box 1. The standard gas inlet 15 is connected to the input end of the gas chamber 10 through a valve. During use, the pressure sensor 9 is used to detect the pressure inside the gas chamber 10. The gas chamber 10 plays a role in gas buffering, helping to maintain the stability of the pressure at the probe sampling port of the carbon dioxide analyzer 5. At the same time, by setting the standard gas inlet 15, the carbon dioxide analyzer 5 can be calibrated regularly to ensure the accuracy of the measurement data.

[0030] Refer to Figure 4, a liquid extraction pump 13 is fixedly arranged in the monitoring box body 1. One end of the liquid extraction pump 13 is connected to the water remover 7 through a solenoid valve 12, and the other end of the liquid extraction pump 13 is fixedly provided with a liquid outlet 11. During use, when the float switch and the liquid level gauge in the water remover 7 detect that the liquid content in the water remover 7 reaches a certain height, the solenoid valve 12 opens, and the liquid extraction pump 13 can extract the liquid in the water remover 7 and then discharge it through the liquid outlet 11 to ensure the reliable operation of the water remover 7.

[0031] Refer to Figure 1 , Figure 3 and Figure 4 , a CO2 on-line monitoring device for gas monitoring of a ship exhaust gas decarbonization system further includes a sampling probe 8 for collecting gas. Sampling probes 8 are respectively arranged at the inlet and outlet of the exhaust gas treatment device, and can detect the exhaust gas before and after treatment respectively. A filter element 801 is fixedly arranged at the input end of the sampling probe 8 to remove large molecular particulate matters in the sampled gas. An exhaust pipe 802 and a backflush pipe 803 are fixedly arranged on the sampling probe 8. The exhaust pipe 802 is connected to the sampled gas inlet 701, and valves are fixedly arranged on both the exhaust pipe 802 and the backflush pipe 803. During use, the pipeline and the filter element 801 in the sampling probe 8 can be regularly cleaned through the backflush pipe 803 to prevent blockage and improve the service life.

[0032] In the present utility model, multi-stage dehumidification is adopted by using an electronic condenser 4, a water remover 7, and a gas drying pipe 3. There is no problem of replacing desiccant. It can be started with one key when powered on, with less maintenance work and simple and convenient operation. Compared with the equipment that only uses the condenser 4, there are problems such as high gas humidity, unsatisfactory dehumidification effect, and even inability to remove water from the sampled gas with liquid, resulting in the sampled gas not meeting the requirement of the carbon dioxide analyzer 5 for the humidity of the sampled gas, affecting the measurement accuracy and service life of the instrument. Moreover, during use, due to the occasional excessive water content in the sampled gas in the decarbonization system, for the equipment that only uses the condenser 4 for gas drying, this occasional excessive water content will exceed the processing capacity of the condenser 4, thus unable to fully dry the sampled gas, causing moisture to enter the gas chamber 10 of the carbon dioxide analyzer 5. After long-term operation, it is easy to affect the measurement accuracy and even cause damage to the instrument. The present utility model adopts a multi-stage dehumidification scheme using a water remover 7, an electronic condenser 4, and a gas drying pipe 3, and the treatment effect is significantly better than the single-stage dehumidification scheme of the traditional condenser 4, enabling the sampled gas to fully meet the requirement of the detection instrument for the humidity of the sampled gas.

[0033] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A CO2 online monitoring device for gas monitoring of a ship exhaust decarbonization system, comprising a monitoring box (1), on which a control unit (101) is fixedly arranged, characterized in that: Also includes: A dehumidifier (7) is fixedly arranged in the monitoring box (1); a sample gas inlet (701) is fixedly arranged on the monitoring box (1); an input end of the dehumidifier (7) is connected to the sample gas inlet (701); A gas filter (6), wherein an input end of the gas filter (6) is connected to an output end of the water remover (7); The condenser (4) is fixedly arranged on the monitoring box (1), and the output end of the gas filter (6) is connected to the input end of the condenser (4) through the gas sampling pump (2); A carbon dioxide analyzer (5) is fixedly arranged in the monitoring box (1), and an input end of the carbon dioxide analyzer (5) is connected to an output end of the condenser (4).

2. A CO2 online monitoring device for gas monitoring in a ship exhaust decarbonization system according to claim 1, characterized in that: It also includes a gas drying tube (3), One end of the gas drying tube (3) is connected to the output end of the condenser (4) through an air inlet pipe (301), and the other end of the gas drying tube (3) is connected to the input end of the carbon dioxide analyzer (5) through an air outlet pipe (302), and valves are fixedly provided on both the air inlet pipe (301) and the air outlet pipe (302).

3. A CO2 online monitoring device for gas monitoring in a ship exhaust decarbonization system according to claim 2, characterized in that: A purge gas inlet (303) is fixedly provided at one end of the gas drying tube (3) close to the gas outlet tube (302), and a purge gas outlet (304) is fixedly provided at one end of the gas drying tube (3) close to the gas inlet tube (301), and valves are fixedly provided on both the purge gas inlet (303) and the purge gas outlet (304).

4. The CO2 online monitoring device for gas monitoring of ship exhaust decarbonization system according to claim 1 is characterized in that: A back-blowing gas inlet (702) is fixedly provided on the monitoring box (1), and the back-blowing gas inlet (702) is connected to the sample gas inlet (701) via a valve.

5. The CO2 online monitoring device for gas monitoring of ship exhaust decarbonization system according to claim 1 is characterized in that: The carbon dioxide analyzer (5) is fixedly provided with an air chamber (10), the air chamber (10) is fixedly provided with a pressure sensor (9), the output end of the air chamber (10) is fixedly provided with a sample gas outlet (501), the monitoring box (1) is fixedly provided with a standard gas inlet (15), and the standard gas inlet (15) is connected to the input end of the air chamber (10) through a valve.

6. The CO2 online monitoring device for gas monitoring of ship exhaust decarbonization system according to claim 1 is characterized in that: A liquid pump (13) is fixedly arranged in the monitoring box (1), one end of the liquid pump (13) is connected to the dewatering device (7) via a solenoid valve (12), and a liquid outlet (11) is fixedly arranged at the other end of the liquid pump (13).

7. The CO2 online monitoring device for gas monitoring of ship exhaust decarbonization system according to claim 1 is characterized in that: It also includes a sampling probe (8) for collecting gas, wherein a filter element (801) is fixedly provided at the input end of the sampling probe (8), an exhaust pipe (802) and a recoil pipe (803) are fixedly provided on the sampling probe (8), the exhaust pipe (802) is connected to the sample gas inlet (701), and valves are fixedly provided on the exhaust pipe (802) and the recoil pipe (803).

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