Sampling system for online monitoring of sulfite in desulfurization slurry

Abstract

The utility model discloses a sampling system for online monitoring of sulfite in desulfurization slurry. The system comprises a cyclone, a ceramic filter, a water sample storage cup, an electromagnetic valve, a peristaltic pump, a liquid level detector and a dilution cup. The system comprises three peristaltic pumps and four electromagnetic valves, wherein each electromagnetic valve comprises a common end C, a normally closed end NC and a normally open end NO; a filtered water outlet of the cyclone is connected with the ceramic filter through the first peristaltic pump, the second peristaltic pump collects water filtered by the ceramic filter into the water sample storage cup, and then the third peristaltic pump transfers the water in the water sample storage cup into the dilution cup for dilution by a certain multiple. The sampling system is combined with an automatic online sulfite analyzer for use, and the concentration of sulfite in slurry in a desulfurization tower can be monitored in real time, so that stable operation of equipment of a desulfurization system is ensured.

Description

Technical Field

[0001] The utility model relates to the field of chemical analysis instruments, in particular to a sampling system for online monitoring of sulfite in desulfurization slurry. Background Art

[0002] An online sulfite analyzer is an important testing device used to monitor the sulfite content in water samples in real time. This instrument is widely used in water treatment, food processing, beverage manufacturing, agricultural research, and other fields, and is a key tool for ensuring product quality and safety.

[0003] For example, the limestone-gypsum wet flue gas desulfurization process, which removes sulfur dioxide from flue gas in thermal power plants, is the most widely used flue gas desulfurization technology in fuel-fired power plants today. To ensure stable and standard sulfur dioxide emissions, real-time monitoring of the sulfite concentration in the slurry within the desulfurization tower is necessary to ensure stable operation of the desulfurization system equipment and prevent the limestone slurry in the desulfurization absorption tower from deteriorating and poisoning, which could lead to gypsum formation failure and slurry throwing, resulting in environmental incidents such as excessive sulfur dioxide emissions. Therefore, sulfite content is a key parameter for evaluating the degree of desulfurization reaction. However, the slurry in the desulfurization tower is relatively viscous, which can easily clog the sampling tube of the online analyzer used to measure the sulfite content in the desulfurization slurry.

[0004] In view of the above situation, the utility model provides a sampling system for online monitoring of sulfite in desulfurization slurry, which can monitor the sulfite concentration of the slurry in the desulfurization tower in real time to ensure stable operation of the equipment belonging to the desulfurization system. Utility Model Content

[0005] The utility model provides a sampling system for online monitoring of sulfite in desulfurization slurry. The system includes a cyclone, a ceramic filter, a water sample storage cup, a solenoid valve, a peristaltic pump, a liquid level detector, and a dilution cup. The system comprises three peristaltic pumps and four solenoid valves, each of which includes a common terminal C, a normally closed terminal NC, and a normally open terminal NO. The filtered water outlet of the cyclone is connected to the ceramic filter via a first peristaltic pump. The second peristaltic pump then collects the water filtered by the ceramic filter into the water sample storage cup. The third peristaltic pump then transfers the water in the water sample storage cup to the dilution cup for dilution by a certain multiple.

[0006] Furthermore, the third peristaltic pump is a peristaltic pump with a Hall sensor.

[0007] Furthermore, an overflow port is provided at the upper end of the water sample storage cup, and a connecting pipe of the overflow port is also connected to a liquid level detector.

[0008] Beneficial effects of the utility model:

[0009] The utility model adopts a sampling system for online monitoring of sulfite in desulfurization slurry. Due to the use of a filtering system with a special structure and the step of backwashing the ceramic filter, the sampling system can measure the sulfite content in the desulfurization slurry online and monitor the sulfite concentration of the slurry in the desulfurization tower in real time to ensure the stable operation of the equipment belonging to the desulfurization system. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The utility model discloses a sampling system for online monitoring of sulfite in desulfurization slurry.

[0011] Figure 2 This is the structural diagram of the ceramic filter of this utility model

[0012] Figure 3 This is a three-dimensional structural diagram of the water sample storage cup of the present utility model.

[0013] Figure 4 This is a structural diagram of the dilution cup of the utility model.

[0014] In the figure: 1—cyclone, 1.1—coarse filtrate outlet, 1.2—slurry inlet, 1.3—mud discharge outlet, 1.4—primary filtered water outlet, 2—first peristaltic pump, 3—ceramic filter, 3.1—upper outlet, 3.2—lower inlet, 3.3—side interface, 4—second peristaltic pump, 5—first solenoid valve, 5.1—tap water outlet, 6—liquid level detector 1, 7—water sample storage cup, 7.1—overflow port, 7.2—upper inlet, 7.3—lower outlet, 8—second solenoid valve, 9—third solenoid valve, 10—third peristaltic pump, 11—liquid level monitor 2, 12—fourth solenoid valve, 13—water sample dilution cup, 13.1—inlet, 13.2—water intake. DETAILED DESCRIPTION

[0015] The following is a further description of a sampling system for online monitoring of sulfite in desulfurization slurry according to the present invention in conjunction with the accompanying drawings and specific embodiments.

[0016] like Figure 1As shown, the utility model is a sampling system for online monitoring of sulfite in desulfurization slurry, which includes a cyclone (1), a peristaltic pump (2, 4), a ceramic filter (3), a water sample storage cup (7), a solenoid valve (5, 8, 9, 12), a peristaltic pump (10), a liquid level detector (6, 11), and a dilution cup (13). The solenoid valves (5, 8, 9, 12) of the system each include a common end C, a normally closed end NC, and a normally open end NO. The filtered water outlet (1.4) of the cyclone (1) is connected to the ceramic filter (3) through a first peristaltic pump (2), and the second peristaltic pump (4) collects the water filtered by the ceramic filter into the water sample storage cup (7). Then, the water sample to be tested is transferred to the dilution cup (13) for dilution by a certain multiple and supplied to the sulfite online analyzer for sampling.

[0017] When specifically connected, the filtered water outlet (1.4) of the cyclone (1) is connected to one end of the first peristaltic pump (2) through a connecting pipe; the other end of the first peristaltic pump (2) is connected to the lower inlet (3.2) of the ceramic filter (3) through a connecting pipe; the side interface (3.3) of the ceramic filter (3) is connected to one end of the second peristaltic pump (4) through a connecting pipe; the other end of the second peristaltic pump (4) is connected to the common end of the first solenoid valve (5); the connecting pipe connected to the NO end of the first solenoid valve (5) is connected to the upper inlet (7.2) of the water sample storage cup (7); the lower outlet (7.3) of the water sample storage cup (7) is connected to the upper inlet (7.2) of the water sample storage cup (7). ) is connected to the NC end of the second solenoid valve (8); the NO end of the second solenoid valve (8) is connected to the common end of the third solenoid valve (9); the common end of the second solenoid valve (8) is connected to one end of the third peristaltic pump (10) through a connecting pipe, the other end of the third peristaltic pump (10) is connected to the common end of the fourth solenoid valve (12), and the NO end of the fourth solenoid valve (12) is connected to the liquid level detector (11); the NC end of the fourth solenoid valve (12) is connected to the inlet (13.1) of the water sample dilution cup (13), and the water inlet (13.2) of the water sample dilution cup (13) is connected to the sampling port of the sulfite online analyzer.

[0018] During sampling, the original water sample is connected to the slurry inlet (1.2) of the cyclone (1), the coarse filtered water is discharged from the coarse filtrate outlet (1.1), and the slurry is discharged from the slurry outlet (1.3). The first peristaltic pump (2) extracts the water sample from the cyclone (1) from the filtered water outlet (1.4) to the ceramic filter (3), and then discharges it from the upper outlet (3.1). The first solenoid valve (5) is not energized, and the second peristaltic pump (4) pumps the filtered water from the side interface (3.3) of the ceramic filter (3) through the first solenoid valve (5) into the water sample storage cup (7). When the liquid level detector (6) detects the presence of liquid, the first peristaltic pump (2) stops rotating, the first solenoid valve (5) is energized, and the second peristaltic pump (4) rotates in the opposite direction to extract tap water (5.1) to clean the ceramic filter (3); the second solenoid valve (8) is energized, the fourth solenoid valve (12) is not energized, and the third peristaltic pump (10) is in operation. The water sample in the water sample storage cup (7) is extracted by rotating. After the liquid level detector (11) detects the presence of water, the fourth electromagnetic valve (12) is energized, the fourth electromagnetic valves (8, 9) are de-energized, and the third peristaltic pump (10) rotates in the reverse direction to pump the water sample in the connecting pipe between the electromagnetic valves (8, 12) into the water sample dilution cup (13); the third and fourth electromagnetic valves (9, 10) are energized, the second electromagnetic valve (8) is de-energized, and the third peristaltic pump (10) rotates in the forward direction to pump the diluted water in the connecting pipe between the second, third, and fourth electromagnetic valves (8, 9, 12) into the water sample dilution cup (13). The length of the connecting pipe between the electromagnetic valves (8, 9, 12) is determined according to the dilution multiple of the water sample, and any dilution multiple of the water sample can be achieved. After the water sample is diluted, the sampling tube of the sulfite online analyzer extracts the water sample from the water inlet (13.2) of the water sample dilution cup (13) for detection.

[0019] In summary, the above are merely embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A sampling system for online monitoring of sulfite in desulfurization slurry, characterized by: The system includes a cyclone, a ceramic filter, a water sample storage cup, a solenoid valve, a peristaltic pump, a liquid level detector, and a dilution cup. The sampling system includes three peristaltic pumps and four solenoid valves, each of which includes a common terminal C, a normally closed terminal NC, and a normally open terminal NO. The filtered water outlet of the cyclone is connected to the ceramic filter via a first peristaltic pump, the second peristaltic pump collects the water filtered by the ceramic filter into the water sample storage cup, and then the third peristaltic pump transfers the water in the water sample storage cup to the dilution cup for dilution by a certain multiple.

2. A sampling system for online monitoring of sulfite in desulfurization slurry according to claim 1, characterized in that: The third peristaltic pump is a peristaltic pump with a Hall sensor.

3. A sampling system for online monitoring of sulfite in desulfurization slurry according to claim 1, characterized in that: An overflow port is provided at the upper end of the water sample storage cup, and a connecting pipe of the overflow port is also connected to a liquid level detector.

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