Detection system for flue gas treatment slurry

Abstract

The utility model discloses a flue gas treatment slurry detection system, which comprises a gas-liquid separator, a mass flow meter, a detection tank and a detection assembly arranged on the detection tank, the input end of the gas-liquid separator is connected with a slurry pool, and the liquid output end is connected with the fluid input end on the lower side of the detection tank through the mass flow meter. The gas-liquid separator separates gas and liquid from the slurry, the separated liquid reaches the detection tank through the mass flow meter, and the slurry is detected through the detection assembly on the detection tank, so that the gas in the slurry is prevented from influencing the detection result, and the detection accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of flue gas treatment technology, and specifically to a detection system for flue gas treatment slurry. Background Technology

[0002] With increasingly stringent environmental emission standards and the government's intensified efforts to control pollution, the national requirements for ultra-low emission retrofitting of flue gas stipulate that emission standards must be met, with SO2 emission concentration <35mg / Nm³. 3 Particulate matter concentration <5mg / Nm 3 NO X Emission concentration <50mg / Nm 3 .

[0003] Flue gas treatment slurry is an important medium for flue gas treatment, including desulfurization slurry and denitrification slurry. Commonly used slurries include limestone slurry and lime slurry. The flue gas treatment slurry is stored in a slurry tank and transported to the spray system via a slurry circulation pump. After atomization, it comes into countercurrent contact with and reacts with the flue gas to remove acidic gases such as SO2, HCl, and HF from the flue gas.

[0004] Flue gas treatment slurries typically possess specific physicochemical parameters that significantly impact desulfurization efficiency, such as pH and slurry density. Currently, the pH and density measurements of flue gas treatment slurries are often improperly configured and lack corresponding flushing measures, leading to severe wear and corrosion of related components, inaccurate measurements, and adversely affecting the stable operation of the flue gas treatment system. Utility Model Content

[0005] In view of the above-mentioned technical problems existing in the prior art, the present invention provides a detection system for flue gas treatment slurry, thereby improving the accuracy of flue gas treatment slurry measurement.

[0006] This utility model discloses a detection system for flue gas treatment slurry, including a gas-liquid separator, a mass flow meter, a detection tank, and a detection component installed on the detection tank.

[0007] The input end of the gas-liquid separator is connected to the slurry tank, and the liquid output end is connected to the fluid input end on the lower side of the detection tank via a mass flow meter.

[0008] Preferably, the gas output end of the gas-liquid separator and the output end of the detection tank are respectively connected to the trench;

[0009] The gas output end is equipped with a seventh valve.

[0010] Preferably, it also includes a flushing assembly, which includes a water supply source connected to the input end of the gas-liquid separator via a second valve.

[0011] Preferably, a first valve is provided at the output end of the slurry tank;

[0012] A third valve is installed at the gas output end of the gas-liquid separator.

[0013] Preferably, the drain port at the lower end of the testing tank is connected to the trench via an eighth valve.

[0014] Preferably, the fluid output end of the gas-liquid separator is connected to the trench via a ninth valve.

[0015] Preferably, the output and input ends of the mass flow meter are respectively equipped with a fifth valve and a sixth valve.

[0016] The fluid output end of the gas-liquid separator is connected to the fluid input end of the detection tank via a fourth valve.

[0017] Preferably, the first valve, the second valve, and the third valve are electric valves;

[0018] The fourth, fifth, sixth, seventh, eighth, and ninth valves are manual valves.

[0019] Preferably, the detection assembly includes one or two pH meters;

[0020] The gas-liquid separator and the detection tank are made of fiberglass.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows: the gas-liquid separator separates gas and liquid from the slurry, and the separated liquid reaches the detection tank through the mass flow meter. The slurry is then detected by the detection components on the detection tank, avoiding the influence of gas in the slurry on the detection results and improving the accuracy of the detection. Attached Figure Description

[0022] Figure 1 This utility model relates to a detection system for desulfurization slurry;

[0023] Figure 2 This is a schematic diagram of the medium flow direction during tank flushing.

[0024] The diagram is labeled: 1. Slurry tank; 21. First valve; 22. Second valve; 23. Third valve.

[0025] 3. Gas-liquid separator, 41. Fourth valve, 42. Fifth valve, 43. Sixth valve, 44. Seventh valve, 45. Eighth valve, 46. Ninth valve, 5. Mass flow meter, 6. Detection tank, 7. Detection assembly, 8. Ditch, 9. Water supply source. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] The present invention will now be described in further detail with reference to the accompanying drawings:

[0028] A detection system for flue gas treatment slurry, such as Figure 1 and Figure 2 It includes a gas-liquid separator 3, a mass flow meter 5, a detection tank 6, and a detection component 7 installed on the detection tank 6. The input end of the gas-liquid separator 3 is connected to the slurry tank 1, and the liquid output end is connected to the fluid input end on the lower side of the detection tank 6 through the mass flow meter 5.

[0029] The gas-liquid separator separates gas and liquid from the slurry. The separated liquid reaches the detection tank via a mass flow meter, and the slurry is detected by the detection components on the detection tank. This avoids the influence of gas / bubbles in the slurry on the detection results and improves the accuracy of the detection.

[0030] The gas output end of the gas-liquid separator 3 and the output end of the detection tank 6 are respectively connected to the trench 8 to discharge waste gas and waste liquid; the gas output end is equipped with a seventh valve 44.

[0031] This invention also includes a flushing assembly, which comprises a water supply source 9 connected to the input end of the gas-liquid separator 3 via a second valve 22. The water supply source is used to flush the gas-liquid separator and downstream mass flow meter and detection tank.

[0032] The output end of the slurry tank 1 is equipped with a first valve 21; the gas output end of the gas-liquid separator 3 is equipped with a third valve 23. The drain port at the lower end of the detection tank 6 is connected to the drainage ditch 8 through an eighth valve 45. The fluid output end of the gas-liquid separator 3 is connected to the drainage ditch 8 through a ninth valve 46.

[0033] The mass flow meter 5 is equipped with a fifth valve 42 and a sixth valve 43 at its output and input ends, respectively. The fluid output end of the gas-liquid separator 3 is connected to the fluid input end of the detection tank 6 through a fourth valve 41, forming a bypass. The instrument setup is safe and reliable. When the mass flow meter 5 needs maintenance, the fifth valve 42 and the sixth valve 43 can be closed, the fourth valve 41 can be opened, and the mass flow meter 5 can be removed for repair or replacement.

[0034] Among them, the first valve 21, the second valve 22, and the third valve 23 are electric valves, which can be electric butterfly valves; the fourth valve 41, the fifth valve 42, the sixth valve 43, the seventh valve 44, the eighth valve 45, and the ninth valve 46 are manual valves, which can be manual butterfly valves, but are not limited to these. By setting electric valves, automatic flushing can be achieved, ensuring the stability and accuracy of the detection system.

[0035] The detection component 7 includes one or two sets of pH meters and / or densitometers; the gas-liquid separator 3 and the detection tank 6 are made of fiberglass, which has good corrosion resistance and saves manufacturing costs.

[0036] This utility model also includes a DCS system, which is connected to the electric valve, mass flow meter and detection component respectively.

[0037] This utility model can be installed near the slurry pool of a wet desulfurization absorption tower for measuring the pH and density of the desulfurization slurry. It includes a gas-liquid separator, a densitometer tank, valves (electric and manual), a pH meter and a densitometer, as well as connecting pipes, flushing components, and discharge components. It integrates pH and density measurements (converted from mass flow rate measurement) of the desulfurization slurry into a single system, enabling accurate and stable measurement and automated operation, saving time and labor, and contributing to the stable operation of the desulfurization system. It meets usage requirements while reducing footprint and saving investment costs. During operation, it can automatically control the electric valves for flushing according to instrument needs, reducing equipment maintenance and labor costs, thereby reducing system construction and operating costs; it saves time and labor, ensures the accuracy of pH and density measurements (converted from mass flow rate measurement), and extends the equipment's lifespan.

[0038] This invention uses a gas-liquid separator to separate foaming slurry, allowing subsequent instruments to accurately measure the slurry's pH value and density. The various components are connected by pipes of appropriate diameter and material according to process requirements, ensuring stable operation of the entire system.

[0039] In normal operating mode, a portion of the slurry in slurry tank 1 sequentially enters gas-liquid separator 3 through first valve 21 for gas-liquid separation. The separated bubbles are discharged through third valve 23 and pipe into drain 8. The slurry separated by gas-liquid separator 3 flows out from its bottom and enters mass flow meter 5 through fifth valve 42. During normal operation, the slurry fills the cavity of mass flow meter 5 and maintains a flowing state. Mass flow meter 5 completes measurement, conversion, and transmits the signal to DCS system. Then, the slurry flows out from the other end of mass flow meter 5 and enters the bottom of detection tank 6 through sixth valve 43, filling detection tank 6. During this process, detection components 7 installed on the side wall of detection tank 6 complete data measurement. To maintain measurement accuracy, two sets of detection components 7 can be set. The measured signals are transmitted to DCS system for receiving detection data and controlling electric valves. DCS system is existing technology and will not be described in detail here. The slurry flowing out from the top of detection 6 is discharged through seventh valve 44 and pipe into drain 8. The flow of bubbles and slurry is achieved through pipes connecting the various devices.

[0040] During normal operation, valves 21 and 23 are open, valve 22 is closed, valves 41 and 45 are closed, and all other manual valves are open. The slurry flows as follows: Figure 1 The flow is in the direction indicated by the arrow.

[0041] To ensure the accuracy of instrument measurements and extend the service life of the instrument probes, the probes of mass flow meter 5 and detection assembly 7 need to be flushed periodically. The DCS system controls the flushing logic. When the flushing process begins, the second valve 22 opens, while the first valve 21 and the third valve 23 close. The flushing water sequentially passes through the second valve 22, gas-liquid separator 3, fifth valve 42, mass flow meter 5, sixth valve 43, detection tank 6, and seventh valve 44, finally discharging into the drain 8, completing the sequential flushing. After flushing, the second valve 22 is closed, and the first valve 21 and the third valve 23 are opened, resuming normal operation. The flushing water... Figure 2 The flow is in the direction shown.

[0042] The detection system can operate continuously in both normal working mode and rinsing mode, controlled by the DCS system according to logic, requiring no manual operation, thus saving time and effort. This ensures the accuracy of the measured values ​​and extends the service life of the equipment.

[0043] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A detection system for flue gas treatment slurry, characterized in that, It includes a gas-liquid separator (3), a mass flow meter (5), a detection tank (6), and a detection assembly (7) installed on the detection tank (6). The input end of the gas-liquid separator (3) is connected to the slurry tank (1), and the liquid output end is connected to the fluid input end of the detection tank (6) via the mass flow meter (5).

2. The detection system according to claim 1, characterized in that, The gas output end of the gas-liquid separator (3) and the output end of the detection tank (6) are respectively connected to the trench (8); The gas output end is equipped with a seventh valve (44).

3. The detection system according to claim 2, characterized in that, It also includes a flushing assembly, which includes a water supply source (9) connected to the input end of the gas-liquid separator (3) via a second valve (22).

4. The detection system according to claim 3, characterized in that, The output end of the slurry tank (1) is equipped with a first valve (21); A third valve (23) is provided at the gas output end of the gas-liquid separator (3).

5. The detection system according to claim 4, characterized in that, The drain port at the lower end of the testing tank (6) is connected to the trench (8) through the eighth valve (45).

6. The detection system according to claim 5, characterized in that, The fluid output end of the gas-liquid separator (3) is connected to the trench (8) through the ninth valve (46).

7. The detection system according to claim 6, characterized in that, The mass flow meter (5) is equipped with a fifth valve (42) and a sixth valve (43) at its output and input ends, respectively. The fluid output end of the gas-liquid separator (3) is connected to the fluid input end of the detection tank (6) through the fourth valve (41).

8. The detection system according to claim 7, characterized in that, The first valve (21), the second valve (22), and the third valve (23) are electric valves; The fourth valve (41), the fifth valve (42), the sixth valve (43), the seventh valve (44), the eighth valve (45), and the ninth valve (46) are manual valves.

9. The detection system according to claim 1, characterized in that, The detection component (7) includes one or two pH meters; The gas-liquid separator (3) and the detection tank (6) are made of fiberglass.

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