On-site detection device for density of slurry in ammonia desulfurization tower

Abstract

The utility model discloses an on-site detection device for the slurry density of an ammonia desulfurization tower, which relates to the technical field of slurry density detection and comprises a slurry storage device with a closed working cavity, and the closed working cavity is in opening and closing connection with an inlet of a circulating pump through a first valve. The closed working cavity is in opening and closing connection with the outlet of the circulating pump through the second valve, and when the first valve and the second valve are both in an opening state, the closed working cavity temporarily stores slurry through the pressure difference between the outlet and the inlet of the circulating pump. Through the arrangement of the slurry storage device, the slurry can be conveyed into the slurry storage device for temporary storage by utilizing the pressure difference between the inlet and the outlet of the circulating pump when the first valve and the second valve are opened, so that convenient sampling is realized.

Description

Technical Field

[0001] This utility model relates to the field of slurry density detection technology, specifically to a field detection device for slurry density in ammonia desulfurization towers. Background Technology

[0002] Ammonia-based flue gas desulfurization is a commonly used method for desulfurizing flue gas produced after the combustion of high-sulfur fuels. Its main application is in thermal power plants, where it can effectively remove sulfur dioxide from flue gas to meet environmental emission standards.

[0003] Ammonia-based desulfurization technology is based on the reaction of NH3 and SO2 in an aqueous solution. In the absorption section of a multi-functional flue gas desulfurization tower, ammonia water absorbs SO2 from the boiler flue gas. This yields an aqueous solution of ammonium sulfite (hereinafter referred to as ammonium sulfite) or ammonium bisulfite, which is then oxidized directly into ammonium sulfate by compressed air in an oxidation tank outside the desulfurization tower. In the concentration section of the desulfurization tower, the ammonium sulfate slurry is concentrated using the heat of the high-temperature flue gas, resulting in an ammonium sulfate slurry with 3%-5% ammonium sulfate solids. This ammonium sulfate slurry then enters a post-treatment system, undergoing concentration by a hydrocyclone, separation by a centrifuge, drying by a dryer, and packaging to obtain the final ammonium sulfate product.

[0004] The concentration section of the desulfurization tower contains ammonium sulfate saturated slurry. Currently, the saturation level of the ammonium sulfate slurry is determined based on its density. Typically, a remote density meter is installed at the bottom of the desulfurization tower, connected to the control system, transmitting the density value to the DCS monitoring system. Staff can then monitor the density of the ammonium sulfate slurry at the bottom of the tower. However, due to factors such as blockage in the delivery pipeline and crystallization, there may be an error between the slurry density obtained from the DCS monitoring and the actual density of the ammonium sulfate slurry at the bottom of the tower. Therefore, staff generally need to periodically visit the desulfurization tower to take samples and measure their density. They must compare the measured density with the density obtained from the DCS monitoring system. If they differ, it indicates blockage or crystallization in the delivery pipeline, requiring immediate attention. Currently, the sampling method at the desulfurization tower site generally involves staff collecting the slurry from the drain outlet of the circulating pump at the desulfurization tower site and then measuring the density of the collected slurry. However, using the above sampling method, the slurry at the drain outlet will splash everywhere, making collection inconvenient. In addition, the slurry collection location is the drain outlet of the circulating pump, and the density of the slurry at this location will have an error compared to the actual slurry density in the desulfurization tower, resulting in inaccurate measurements.

[0005] To address this issue, we propose an on-site testing device for the slurry density of ammonia desulfurization towers. Utility Model Content

[0006] The purpose of this invention is to provide a field testing device for the density of slurry in an ammonia desulfurization tower in order to solve the problems in the prior art. This testing device is provided by setting up a slurry storage container that is connected to both the inlet and outlet of the circulating pump. By utilizing the pressure difference between the inlet and outlet of the circulating pump, the slurry is temporarily stored inside the slurry storage container, which enables convenient sampling. The sampled slurry can then be measured.

[0007] To solve the above problems, this utility model provides the following technical solution:

[0008] A field testing device for the density of slurry in an ammonia desulfurization tower includes a slurry storage tank with a sealed working chamber. The sealed working chamber is connected to the inlet of a circulating pump via a first valve, and the sealed working chamber is connected to the outlet of the circulating pump via a second valve. When both the first and second valves are open, the slurry is temporarily stored in the sealed working chamber due to the pressure difference between the outlet and inlet of the circulating pump.

[0009] As a further embodiment of this invention: a float density meter is installed inside the sealed working chamber of the slurry storage device.

[0010] As a further embodiment of this utility model: the slurry storage device consists of a cylindrical storage tank with one end open and an end cap, and the end cap is detachably and sealingly installed at the open end of the cylindrical storage tank.

[0011] As a further embodiment of this utility model: a drain pipe is connected to the bottom of the sealed working chamber, and a drain valve is provided on the drain pipe.

[0012] As a further embodiment of this utility model: the sealed working chamber is connected to the outlet of the circulating pump through a second pipeline, and a second valve is installed on the second pipeline.

[0013] As a further embodiment of this utility model: the sealed working chamber is connected to the inlet of the circulating pump through a first pipeline, and a first valve is installed on the first pipeline.

[0014] As a further embodiment of this invention: the slurry storage container is provided with a transparent observation window for observing the float density meter.

[0015] As a further embodiment of this utility model: the first valve, the second valve, and the drain valve are all configured as stainless steel flange ball valves.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting up a slurry storage tank and utilizing the pressure difference between the inlet and outlet of the circulating pump, the slurry can be transported to the slurry storage tank for temporary storage when the first and second valves are opened, thus enabling convenient sampling.

[0018] 2. When the first and second valves are opened, a certain amount of slurry is stored in the sealed working chamber of the slurry storage device. During this process, the slurry inside the slurry storage device circulates for a period of time. This is to ensure that the slurry inside the slurry storage device is kept in line with the slurry flowing on site, thereby improving the slurry collection effect.

[0019] 3. With the installation of the drain pipe, when a large amount of slurry is collected inside the slurry storage tank, the staff can open the drain valve and use the drain pipe to discharge a certain amount of slurry from the sealed working chamber of the slurry storage tank until the float level gauge is clearly exposed, so that the staff can read the density value.

[0020] 4. By combining the slurry storage device into a cylindrical storage tank with an open end and an end cap, this detachable structure not only facilitates the cleaning of its sealed working chamber, but also makes it convenient to replace the float density meter.

[0021] 5. Based on the configuration of the slurry storage tank as a cylindrical storage tank and end cap, the end cap can also be removed from the cylindrical storage tank during the opening of the drain valve, so that air enters the cylindrical storage tank during the drain pipe drainage process, thus accelerating the discharge of slurry. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] In the diagram: 1. Circulating pump; 2. Inlet; 3. Outlet; 4. Second valve; 5. Second pipeline; 6. First valve; 7. First pipeline; 8. Slurry storage tank; 9. Float density meter; 10. Drain valve; 11. Drain pipe. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figure 1As shown, an on-site detection device for the density of slurry in an ammonia desulfurization tower includes a slurry storage tank 8. The slurry storage tank 8 has a sealed working chamber for temporarily storing sampled slurry. When the slurry storage tank 8 is installed at the inlet and outlet of the circulating pump 1, a first pipeline 7 is provided to connect the slurry storage tank 8 to the inlet 2 of the circulating pump 1 at the desulfurization tower, and a first valve 6 is provided on the first pipeline 7. A second pipeline 5 is provided to connect the slurry storage tank 8 to the outlet of the circulating pump 1 at the desulfurization tower, and a second valve 4 is provided on the second pipeline 5. The opening and closing of the first pipeline 7 and the second pipeline 5 can be controlled by the first valve 6 and the second valve 4, respectively.

[0027] When sampling is required, since the pressure at outlet 3 of circulating pump 1 is greater than the pressure at inlet 2, the second valve 4 is opened first, and then the first valve 6 is slowly opened. At this time, the slurry will be slowly stored inside the sealed working chamber, and the slurry will circulate between the inlet and outlet of circulating pump 1 through the first pipeline 7 and the second pipeline 5. After the slurry circulates in the sealed working chamber for 3-5 minutes (the specific time can be set according to the actual situation), the slurry temporarily stored in the sealed working chamber will be kept at the same level as the slurry delivered by circulating pump 1. Then the second valve 4 and the first valve 6 will be closed respectively. At this time, a certain amount of slurry will be temporarily stored inside the slurry storage tank 8, and the sampling is completed.

[0028] After sampling is completed, in order to conveniently measure the density of the slurry, a density measuring instrument such as a float density meter 9 can be installed in advance in the sealed working chamber of the slurry storage container 8.

[0029] When a large amount of slurry is collected inside the slurry storage tank 8, making it impossible to observe the float density gauge, this invention addresses this situation by providing a drain pipe 11 connected to the bottom of the sealed working chamber, with a drain valve 10 installed on the drain pipe 11. When there is a large amount of slurry inside the slurry storage tank 8, the operator can open the drain valve 10 and use the drain pipe 11 to drain 1 / 2 to 2 / 3 of the slurry from the sealed working chamber of the slurry storage tank 8 until the float level gauge 9 is clearly visible. After the slurry in the slurry storage tank 8 has settled, the density of the slurry can be directly read through the float density gauge 9. By comparing the density value of the slurry directly sampled on-site with the density value displayed on the DCS at the same time, it can be determined whether there is any blockage or crystallization in the delivery pipeline.

[0030] To facilitate staff observation of the float density meter 9 inside the slurry storage tank 8, the slurry storage tank 8 can be made of transparent material, or a transparent observation window can be installed on the slurry storage tank 8.

[0031] Regarding the aforementioned slurry storage tank 8, it consists of a cylindrical storage tank with one open end and an end cap. The end cap is detachably and sealingly installed at the open end of the cylindrical storage tank. This detachable structure facilitates cleaning of its sealed working chamber and also makes it convenient to replace the float density meter 9. Furthermore, to improve the drainage effect and rate of the drain pipe 11, the end cap can be removed from the cylindrical storage tank while the drain valve 10 is being opened. This allows air to enter the cylindrical storage tank during the drainage process, accelerating the discharge of the slurry.

[0032] Furthermore, in this embodiment, the first valve 6, the second valve 4, and the drain valve 10 are preferably stainless steel flange ball valves. Of course, other types of valves that can meet the requirements of corrosion resistance and high temperature resistance on site can also be used as replacements.

[0033] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A field testing device for the density of slurry in an ammonia desulfurization tower, characterized in that, The system includes a slurry storage tank (8) with a sealed working chamber, and the sealed working chamber is connected to the inlet (2) of the circulating pump (1) through a first valve (6) and the sealed working chamber is connected to the outlet (3) of the circulating pump (1) through a second valve (4). When both the first valve (6) and the second valve (4) are open, the sealed working chamber temporarily stores the slurry due to the pressure difference between the outlet (3) and the inlet (2) of the circulating pump (1).

2. The on-site testing device for the density of slurry in an ammonia desulfurization tower according to claim 1, characterized in that, A float density meter (9) is installed in the sealed working chamber of the slurry storage vessel (8).

3. The on-site testing device for the density of slurry in an ammonia desulfurization tower according to claim 2, characterized in that, The slurry storage device (8) consists of a cylindrical storage tank with one end open and an end cap, and the end cap is detachably and sealingly installed at the open end of the cylindrical storage tank.

4. The on-site testing device for the density of slurry in an ammonia desulfurization tower according to claim 3, characterized in that, The bottom of the sealed working chamber is connected to a drain pipe (11), and a drain valve (10) is provided on the drain pipe (11).

5. A field testing device for the density of slurry in an ammonia desulfurization tower according to any one of claims 1-4, characterized in that, The sealed working chamber is connected to the outlet (3) of the circulating pump (1) through a second pipeline (5), and a second valve (4) is installed on the second pipeline (5).

6. A field testing device for the density of slurry in an ammonia desulfurization tower according to any one of claims 1-4, characterized in that, The sealed working chamber is connected to the inlet (2) of the circulating pump (1) through a first pipeline (7), and a first valve (6) is installed on the first pipeline (7).

7. A field testing device for the density of slurry in an ammonia desulfurization tower according to any one of claims 2-4, characterized in that, The slurry storage container (8) is provided with a transparent observation window for observing the float density meter (9).

8. The on-site testing device for the density of slurry in an ammonia desulfurization tower according to claim 4, characterized in that, The first valve (6), the second valve (4), and the drain valve (10) are all stainless steel flange ball valves.

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