Divided multi-point sampling device for desulfurization slurry

Abstract

The utility model provides a desulfurization slurry partition multipoint sampling device which comprises a plurality of sampling pipelines arranged side by side, a controller and a slurry mixing tank, the sampling pipelines are respectively arranged at different heights of a wet desulfurization tower and are used for leading out circulating slurry; each sampling pipeline is provided with an electromagnetic valve and a flow meter, and the electromagnetic valves on the pipelines are connected with a controller; the tail ends of the sampling pipelines are communicated through a mixing pipeline, and the mixing pipeline is connected with the slurry mixing tank. According to the utility model, the plurality of sampling pipelines are arranged along the height direction of the circulating slurry, and the electromagnetic valves of the sampling pipelines are automatically opened and closed, so that each measurement parameter of the circulating slurry at different heights and the overall average concentration can be timely and accurately measured, and a sufficient basis can be provided for accurate regulation and control of a wet desulphurization reaction process; and the method has important significance on low-energy-consumption and high-efficiency operation of a wet desulphurization system.

Description

Technical Field

[0001] This utility model belongs to the field of slurry sampling technology, specifically relating to a multi-point sampling device for desulfurization slurry. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] The limestone-gypsum wet desulfurization process is closely related to the parameters of the circulating slurry. These parameters include the pH, density, and SO3 content of the circulating slurry. 2- The content of certain substances has a significant impact on desulfurization efficiency and gypsum quality. Therefore, monitoring the parameters of the circulating slurry is crucial for achieving efficient desulfurization and ensuring gypsum quality.

[0004] Traditional limestone-gypsum wet desulfurization systems are equipped with online pH meters and densitometers, enabling online measurement of the pH and density of the circulating slurry. However, SO3... 2- The content is usually measured manually, which cannot accurately determine the SO3 content in the slurry. 2- Online monitoring of concentration is even more important. Currently, the parameters of circulating slurry are mainly measured at a single point. The height of the circulating slurry in wet desulfurization can exceed 10 meters. Due to the influence of mixing lag and uneven distribution, single-point measurement is difficult to represent the true average concentration of each measured parameter of the desulfurization slurry, and it cannot reflect the actual concentration of each measured parameter at different heights of the circulating slurry. To a certain extent, this affects the precise control of the wet desulfurization reaction process. Utility Model Content

[0005] To address the aforementioned problems, this invention proposes a multi-point sampling device for desulfurization slurry. This invention utilizes multi-point sampling pipes arranged along the height of the circulating slurry, combined with the automatic opening and closing of the sampling pipe valves, to achieve timely and accurate measurement of various parameters of the circulating slurry at different heights and the overall average concentration. This provides sufficient basis for the precise control of the wet desulfurization reaction process and is of great significance for the low-energy consumption and high-efficiency operation of wet desulfurization systems.

[0006] According to some embodiments, the present invention adopts the following technical solution:

[0007] A multi-point sampling device for desulfurization slurry includes multiple sampling pipelines arranged in parallel, as well as a controller and a slurry mixing tank. The sampling pipelines are respectively set at different heights of the wet desulfurization tower for drawing out circulating slurry.

[0008] Each sampling pipeline is equipped with a solenoid valve and a flow meter, and the solenoid valves on each pipeline are connected to a controller.

[0009] The ends of each sampling pipeline are connected through a mixing pipeline, which is connected to a slurry mixing tank.

[0010] As an alternative implementation, the sampling pipeline includes at least three, arranged sequentially from high to low along the wet desulfurization tower.

[0011] As an alternative implementation, the sampling pipelines are spaced at equal intervals.

[0012] The interval between the sampling pipelines is 2-3 meters.

[0013] As an alternative implementation, the controller is a PLC controller.

[0014] As an alternative implementation, the slurry mixing tank is equipped with a pH meter, a density meter, and an SO3 meter. 2- Concentration analyzer.

[0015] As an alternative implementation, the bottom of the slurry mixing tank is provided with a slurry discharge pipe, which is connected to a pit.

[0016] As an alternative implementation, an overflow pipe is provided at the upper end of the slurry mixing tank.

[0017] As an alternative implementation, each sampling line is equipped with a flushing device.

[0018] As an alternative implementation, the controller is connected to a host computer.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This invention utilizes multiple sampling pipelines to achieve multi-point sampling of circulating slurry in the desulfurization tower, and through the cooperation of controller and solenoid valve, it can realize patrol sampling.

[0021] This invention utilizes flow meters in each sampling pipeline, as well as pH meters, density meters, and SO3 meters. 2- The concentration analyzer enables timely and accurate measurement of various parameters of the circulating slurry in the desulfurization tower at different heights and the overall average concentration. This provides sufficient basis for the precise control of the wet desulfurization reaction process, effectively improves the accuracy of the desulfurization system operation and control, and is of great significance for the low-energy consumption and high-efficiency operation of the wet desulfurization system.

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0023] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0024] Figure 1 This is a structural diagram of a desulfurization slurry partitioned multi-point sampling device according to one embodiment;

[0025] Among them, 1. Desulfurization tower;

[0026] 2-1, Sampling tube at the first height; 2-2, Sampling tube at the second height; 2-3, Sampling tube at the third height;

[0027] 3-1. Solenoid valve; 3-2. Solenoid valve; 3-3. Solenoid valve;

[0028] 4-1. Flow meter; 4-2. Flow meter; 4-3. Flow meter;

[0029] 5. PLC control box; 6. Host computer; 7. Slurry mixing tank; 8. pH meter; 9. Density meter; 10. SO3 2- Concentration analyzer, 11. Drain pipe, 12. Overflow pipe. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] Where there is no conflict, the embodiments and features described in this application may be combined with each other.

[0034] like Figure 1As shown, a multi-point sampling device for desulfurization slurry is installed on a wet desulfurization tower 1. It includes multiple sampling pipelines (hereinafter referred to as sampling pipes) connected to the wet desulfurization tower 1, solenoid valves and flow meters installed on the sampling pipes, a slurry mixing tank connected to the sampling pipes, a measuring device installed on the slurry mixing tank, a slurry discharge pipe 11 connected to the slurry mixing tank, a PLC control box 5 for controlling the switching of each solenoid valve, and a host computer 6 connected to the PLC control box 5.

[0035] In this embodiment, three sampling pipelines are described.

[0036] like Figure 1 As shown, the raw flue gas enters the desulfurization tower 1 and is desulfurized by countercurrent contact with the circulating slurry. It is then discharged from the top of the desulfurization tower 1. Three sampling tubes are installed at three different heights of the desulfurization tower 1, namely sampling tube 2-1 at the first height, sampling tube 2-2 at the second height, and sampling tube 2-3 at the third height.

[0037] The sampling tube 2-1 at the first height is equipped with a solenoid valve 3-1 and a flow meter 4-1;

[0038] The sampling tube 2-2 at the second height is equipped with a solenoid valve 3-2 and a flow meter 4-2;

[0039] The sampling tube 2-3 at the third height is equipped with a solenoid valve 3-3 and a flow meter 4-3.

[0040] Each solenoid valve is connected to the PLC control box 5. During the desulfurization process, the solenoid valve 3-1 on the sampling pipe 2-1 at the first height is opened using the PLC control box 5. Under the action of pressure difference, the circulating slurry in the desulfurization tower 1 enters the slurry mixing tank 7 through the opened sampling pipe.

[0041] Measuring devices installed on the slurry mixing tank 7 include a pH meter 8, a density meter 9, and an SO3 meter. 2- The concentration analyzer 10 measures the parameters of the slurry and transmits the data to the host computer 6 via the PLC control box 5.

[0042] The slurry in the slurry mixing tank 7 is emptied through the slurry discharge pipe 11. Then, using the PLC control box 5, the solenoid valve 3-1 on the first height sampling pipe 2-1 is closed, and the solenoid valve 3-2 on the second height sampling pipe 2-2 is opened. The above process is repeated until the solenoid valves on all sampling pipes are opened and closed in sequence.

[0043] After the solenoid valves on all the sampling tubes are opened and closed in sequence, the slurry in the slurry mixing tank 7 is emptied. Then, all the solenoid valves on the sampling tubes are opened at once, and the values ​​of the flow meters 4-1, 4-2 and 4-3 of each sampling tube are made the same by adjusting the solenoid valves. The parameters of the slurry are measured by the measuring device installed on the slurry mixing tank 7, and the data is transmitted to the host computer 6 through the PLC control box 5.

[0044] The host computer records and reassembles the data, and visualizes the parameter concentration distribution and average concentration of the circulating slurry at different heights in the desulfurization tower. Based on this, the corresponding auxiliary equipment such as limestone slurry pump, oxidation fan and gypsum discharge pump are controlled.

[0045] Of course, the above-mentioned equipment can be selected using existing technology / existing equipment.

[0046] The interval between each sampling tube is generally between 2 and 3 meters.

[0047] In some embodiments, each sampling tube is equipped with a rinsing device to ensure the accuracy of the measurement data.

[0048] The slurry mixing tank is connected to a bottom drain pipe 11 and an overflow pipe 12 is installed at the top. The slurry in the slurry mixing tank enters the desulfurization system pit through the bottom drain pipe 11 or the upper overflow pipe 12.

[0049] The above description is merely a preferred embodiment of this utility model and is 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 by those skilled in the art without creative effort within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for zoned multi-point sampling of a desulfurized slurry, characterized in that, The application relates to a wet desulfurization sampling device, which comprises multiple parallel sampling pipelines arranged at different heights of a wet desulfurization tower for leading out circulating slurry, a controller and a slurry mixing tank. An electromagnetic valve and a flow meter are arranged on each sampling pipeline, and the electromagnetic valves on the pipelines are connected to the controller. The ends of the sampling pipelines are connected through a mixing pipeline, and the mixing pipeline is connected to the slurry mixing tank. The slurry mixing tank is provided with a pH meter, a density meter and SO3 2- Concentration analyzer.

2. A desulfurized slurry partitioned multi-point sampling device according to claim 1, characterized in that, The sampling pipelines comprise at least three pipelines arranged from high to low along the wet desulfurization tower.

3. The desulfurized slurry partitioned multi-point sampling device according to claim 1, characterized in that, The sampling pipelines are arranged at equal intervals.

4. A desulfurized slurry partitioned multi-point sampling device according to claim 3, characterized in that, The interval distance between the sampling pipelines is 2-3 meters.

5. A desulfurized slurry partitioned multi-point sampling device as set forth in claim 1, characterized by, The controller is a PLC controller.

6. A desulfurized slurry partitioned multi-point sampling device as set forth in claim 1, characterized by, A slurry discharge pipe is arranged at the bottom of the slurry mixing tank, and the slurry discharge pipe is connected to a pit.

7. A desulfurized slurry partitioned multi-point sampling device according to claim 1 or 6, characterized in that, An overflow pipe is arranged at the upper end of the slurry mixing tank.

8. A desulfurized slurry partitioned multi-point sampling device as set forth in claim 1, characterized by, Each sampling pipeline is provided with a flushing device.

9. A desulfurized slurry partitioned multi-point sampling device as set forth in claim 1, characterized by, The controller is connected to an upper computer.

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