Absorption tower system

Abstract

The utility model relates to the technical field of wet desulphurization, in particular to an absorption tower system. The absorption tower system comprises an absorption tower, a slurry observation window, a foam observation window, a slurry circulating unit and a defoaming agent unit. The slurry observation window and the foam observation window are arranged on the outer wall of the absorption tower and are arranged in a staggered manner along the height direction of the absorption tower; the upper edge of the slurry observation window is as high as the lower edge of the foam observation window; and graduated scales are arranged on the slurry observation window and the foam observation window. The slurry circulating unit is communicated with slurry in the absorption tower, and the defoaming agent unit is communicated with the slurry circulating unit, so that a defoaming agent can be mixed with the slurry in the slurry circulating unit and then sprayed onto foam. The absorption tower system can visually monitor the liquid level height of slurry and the foam height, avoids the problems of overflow of the absorption tower and excessive or insufficient addition of a defoaming agent, improves the defoaming efficiency, saves the cost, and improves the safety and the performance of the absorption tower.

Description

Technical Field

[0001] The utility model relates to the technical field of wet desulfurization, in particular to an absorption tower system. Background Art

[0002] At present, in the limestone-gypsum wet desulfurization process, the boiler burns a large amount of low-quality coal and urban sludge, and the amount of coal-fired flue gas and the total amount of pollutants have increased significantly. The desulfurization process water of many units uses high-salt wastewater, sewage, etc., which makes the operating environment of the absorption tower even worse, causing a large amount of foam in the slurry, resulting in false liquid level in the absorption tower, slurry overflow, large fluctuations in the current of equipment such as the slurry circulation pump, unstable equipment operation, and increasing safety hazards in equipment operation.

[0003] Absorption towers in existing technologies are sealed containers, making it impossible for workers to visually observe the slurry and foam levels from the outside. Therefore, most current methods for calculating the liquid level in absorption towers rely on calculating the slurry density based on the pressure differential ΔP measured by pressure transmitters at different heights within the absorption tower's slurry pool. This is then used to calculate the liquid level. However, due to frequent foaming in the slurry, this method can result in significant deviations in the calculated liquid level, impacting equipment safety and potentially leading to insufficient or excessive defoamer addition, reducing defoaming efficiency and increasing costs.

[0004] Therefore, it is urgent to design an absorption tower system to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to propose an absorption tower system that can intuitively monitor the slurry liquid level and foam height, avoid overflow of the absorption tower and excessive or insufficient addition of defoaming agent, improve defoaming efficiency, save costs and improve safety.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The utility model provides an absorption tower system, comprising:

[0008] An absorption tower, a slurry observation window, and a foam observation window, wherein the slurry observation window and the foam observation window are both arranged on the outer wall of the absorption tower, and are staggered along the height direction of the absorption tower; the upper edge of the slurry observation window is at the same height as the lower edge of the foam observation window; and a scale is provided on each of the slurry observation window and the foam observation window;

[0009] a slurry circulation unit, the slurry circulation unit being in communication with the slurry in the absorption tower;

[0010] A defoaming agent unit is provided, wherein the defoaming agent is stored in the defoaming agent unit and is communicated with the slurry circulation unit so that the defoaming agent can be mixed with the slurry in the slurry circulation unit and then sprayed onto the foam.

[0011] As an optional technical solution for an absorption tower system, the slurry observation window and the foam observation window have the same structure.

[0012] As an optional technical solution for an absorption tower system, the foam observation window includes a base and a flange. A mounting hole is provided on the outer wall of the absorption tower, the base is installed at the mounting hole, and the flange is arranged on the side of the base away from the mounting hole.

[0013] As an optional technical solution for an absorption tower system, the foam observation window further comprises glass, a groove is provided on the flange, and the glass is embedded in the groove.

[0014] As an optional technical solution for an absorption tower system, the foam observation window also includes a cover plate and a fixing member. A through hole is opened on the cover plate, the area of the through hole is smaller than the area of the glass, and the cover plate is detachably connected to the flange through the fixing member.

[0015] As an optional technical solution of the absorption tower system, the absorption tower system further includes a flushing unit, the flushing unit is arranged on the base, the flushing units are provided with at least two, and the slurry observation window and the foam observation window are respectively equipped with at least one flushing unit;

[0016] The flushing unit is used to flush the glass of the slurry observation window and the glass of the foam observation window.

[0017] As an optional technical solution for an absorption tower system, the flushing unit includes a main pipe, a branch pipe and a nozzle, one end of the branch pipe is connected to the nozzle, and the other end of the branch pipe is connected to the main pipe, flushing water flows in the main pipe, and the nozzle is arranged directly facing the glass.

[0018] As an optional technical solution for an absorption tower system, the nozzle and the branch pipe are both provided in plurality, and the nozzles are provided in one-to-one correspondence with the branch pipes, and the plurality of nozzles are provided at equal intervals.

[0019] As an optional technical solution for the absorption tower system, a solenoid valve is provided on the main pipe.

[0020] As an optional technical solution of an absorption tower system, the absorption tower system further includes an image acquisition unit, an image processing unit, an image conversion unit and a DCS control unit, wherein the image acquisition unit is arranged in front of the slurry observation window and the foam observation window, the image acquisition unit, the image processing unit, the image conversion unit and the DCS control unit are sequentially connected by signal, and the DCS control unit is signal-connected to the defoaming agent unit;

[0021] The image acquisition unit collects signals of the slurry liquid level height and foam height in real time, and transmits them to the DCS control unit after processing by the image processing unit and the image conversion unit. The DCS control unit calculates the amount of defoaming agent required to process the foam and controls the defoaming agent unit to deliver the required defoaming agent to the slurry circulation unit.

[0022] As an optional technical solution for an absorption tower system, the image acquisition unit includes a first camera and a second camera, the first camera is facing the slurry observation window, and the second camera is facing the foam observation window. The first camera is used to collect the slurry liquid level height and low-level foam height, and the second camera is used to collect the high-level foam height.

[0023] As an optional technical solution for an absorption tower system, the absorption tower system further includes a protective cover, the first camera and the second camera are arranged in the protective cover, and the protective cover is a light-proof structure.

[0024] The beneficial effects of the present invention include at least:

[0025] The utility model provides an absorption tower system, which includes an absorption tower, a slurry observation window, a foam observation window, a slurry circulation unit, and a defoamer unit. The slurry observation window and the foam observation window are both arranged on the outer wall of the absorption tower, and are staggered along the height direction of the absorption tower; the upper edge of the slurry observation window is at the same height as the lower edge of the foam observation window; and both the slurry observation window and the foam observation window are provided with scales. The slurry circulation unit is connected to the slurry in the absorption tower. The defoamer unit stores defoamer, and the defoamer unit is connected to the slurry circulation unit so that the defoamer can be mixed with the slurry in the slurry circulation unit and sprayed onto the foam.

[0026] With this design, the operator can visually observe the slurry liquid level height and foam height through the slurry observation window and foam observation window on the outer wall of the absorption tower, thereby enabling the operator to calculate the absolute height of the foam, thereby accurately controlling the amount of defoaming agent added by the defoaming agent unit to the slurry circulation unit, avoiding the problem of excessive or insufficient addition of defoaming agent, improving the defoaming work efficiency, saving costs, and improving the safety of the absorption tower system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0028] Figure 1 It is a structural schematic diagram of the absorption tower system provided by an embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of the layout of the slurry observation window and the foam observation window provided in an embodiment of the present utility model;

[0030] Figure 3 This is a front view of the foam observation window and flushing unit provided in an embodiment of the present utility model;

[0031] Figure 4 This is a cross-sectional view of the foam observation window and the flushing unit provided in an embodiment of the present utility model;

[0032] Figure 5 It is a side view of the base of the foam observation window provided in an embodiment of the present utility model;

[0033] Figure 6 It is a schematic diagram of the internal structure of the flushing unit and the foam observation window provided in an embodiment of the present utility model.

[0034] Reference numerals

[0035] 100, absorption tower; 110, spray assembly; 120, demister; 130, gas-liquid distributor; 140, inlet flue;

[0036] 200, slurry observation window;

[0037] 300, foam observation window; 310, base; 320, flange; 330, glass; 340, cover; 350, fixing parts;

[0038] 400, slurry circulation unit; 410, first slurry circulation pipeline; 420, second slurry circulation pipeline; 430, circulation pump; 440, fourth control valve;

[0039] 500, defoamer unit; 510, storage tank; 520, first defoamer pipeline; 530, second defoamer pipeline; 540, third defoamer pipeline; 550, delivery pump; 560, first control valve; 570, second control valve; 580, third control valve;

[0040] 600, flushing unit; 610, main pipe; 620, branch pipe; 630, nozzle; 640, solenoid valve;

[0041] 700, image acquisition unit; 710, first camera; 720, second camera;

[0042] 800, image processing unit; 900, image conversion unit; 1000, DCS control unit. DETAILED DESCRIPTION

[0043] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0046] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0047] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0048] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0049] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0050] This embodiment provides an absorption tower system that can intuitively monitor the slurry liquid level and foam height, avoid problems such as absorption tower overflow and excessive or insufficient addition of defoaming agent, improve defoaming efficiency, save costs, and improve safety.

[0051] like Figure 1-Figure 4 As shown, the absorption tower system mainly includes an absorption tower 100, a slurry observation window 200, a foam observation window 300, a slurry circulation unit 400 and a defoaming agent unit 500. Among them, the slurry observation window 200 and the foam observation window 300 are both arranged on the outer wall of the absorption tower 100. Along the height direction of the absorption tower 100, the slurry observation window 200 and the foam observation window 300 are staggered; the upper edge of the slurry observation window 200 is at the same height as the lower edge of the foam observation window 300; and the slurry observation window 200 and the foam observation window 300 are both provided with a scale. The slurry circulation unit 400 is connected to the slurry in the absorption tower 100. The defoaming agent is stored in the defoaming agent unit 500, and the defoaming agent unit 500 is connected to the slurry circulation unit 400 so that the defoaming agent can be mixed with the slurry in the slurry circulation unit 400 and sprayed onto the foam.

[0052] Based on the above design, in this embodiment, the slurry observation window 200 and the foam observation window 300 are staggered along the height direction of the absorption tower 100, so that the strength requirements of the absorption tower 100 can be met as much as possible, and the stability and reliability of the absorption tower 100 can be improved. The upper edge of the slurry observation window 200 is consistent with the lower edge of the foam observation window 300, so that the operator can observe the foam at all heights, and then the operator can judge the actual quality of the slurry by the color of the foam. At the same time, the slurry observation window 200 and the foam observation window 300 are both provided with a scale, which is convenient for the operator to directly read the slurry liquid level height and the foam height. The defoamer unit 500 is connected to the slurry circulation unit 400, so that the defoamer can be mixed with the slurry and transported to the top of the absorption tower 100 to be sprayed onto the foam.

[0053] Compared with the prior art, in this embodiment, the operator can intuitively observe the slurry liquid level height and the foam height through the slurry observation window 200 and the foam observation window 300 on the outer wall of the absorption tower 100, so that the operator can calculate the absolute height of the foam, thereby accurately controlling the absorption tower liquid level and controlling the amount of defoaming agent added by the defoaming agent unit 500 to the slurry circulation unit 400, avoiding the problems of absorption tower overflow, excessive or insufficient addition of defoaming agent, improving the defoaming work efficiency, saving costs, and improving the safety of the absorption tower system.

[0054] The upper edge of the foam observation window 300 in this embodiment is 0.5m lower than the inlet flue 140 of the absorption tower 100. The upper edge of the slurry observation window 200 is at the same height as the lower edge of the foam observation window 300. The middle position of the slurry observation window 200 is the designed liquid level height of the absorption tower 100. The slurry observation window 200 and the foam observation window 300 are staggered. Both the slurry observation window 200 and the foam observation window 300 are provided with a scale with a scale interval of 10cm. The middle of the scale of the slurry observation window 200 is the designed normal liquid level value of the absorption tower 100. For example, the actual liquid level of the slurry is 9m at present, and the liquid level of the slurry is 9.1m when it rises to the next scale. The lowest scale of the foam observation window 300 is the upper edge height of the slurry observation window 200. The foam observation window 300 in this embodiment is mainly used to observe the high level of the foam, and the slurry observation window 200 is mainly used to observe the slurry level and the height of the low-level foam.

[0055] The slurry observation window 200 and the foam observation window 300 in this embodiment have the same structure, which facilitates processing and assembly and subsequent maintenance and replacement of accessories, improves work efficiency, and saves costs. For ease of description, the foam observation window 300 is used as an example for structural description.

[0056] like Figure 1 、 Figure 3-Figure 6As shown, the foam observation window 300 in this embodiment includes a base 310 and a flange 320. A mounting hole is provided on the outer wall of the absorption tower 100, and the base 310 is mounted at the mounting hole. The flange 320 is disposed on the side of the base 310 away from the mounting hole. The provision of the base 310 facilitates the connection between the foam observation window 300 and the absorption tower 100. For example, in this embodiment, the base 310 and the mounting hole may be welded to improve connection stability and reliability and prevent leakage.

[0057] Optionally, the base 310 in this embodiment is made of 316L or higher alloy steel or carbon steel for corrosion resistance, thereby improving the corrosion resistance of the base 310 .

[0058] Furthermore, the foam observation window 300 in this embodiment includes a glass 330. The flange 320 is provided with a groove (not shown), into which the glass 330 is embedded. This improves the stability of the connection between the glass 330 and the flange 320, preventing the glass 330 from shaking or becoming unstable during use. Furthermore, the presence of the glass 330 allows operators to visually assess the slurry level and foam height, improving work efficiency.

[0059] For example, the groove width in this embodiment can be set to 1 cm to 2 cm, and the groove depth can be set to between 0.5 cm and 2 cm. The glass 330 can be set to organic glass 330 or tempered glass 330. The shape of the glass 330 is not limited in this embodiment.

[0060] Furthermore, the foam observation window 300 in this embodiment also includes a cover plate 340 and a fixing member 350. A through hole (not shown) is provided in the cover plate 340. The area of the through hole is smaller than that of the glass 330. This allows a portion of the glass 330 to be exposed, facilitating the operator's acquisition of data on the slurry level and foam height. The provision of the cover plate 340 provides a certain degree of protection for the glass 330. The cover plate 340 is detachably connected to the flange 320 via the fixing member 350, facilitating subsequent replacement of the cover plate 340 and glass 330, and is easily disassembled for simplified maintenance.

[0061] For example, the fixing member 350 may be provided as a plurality of bolts.

[0062] like Figure 3-Figure 6As shown, in this embodiment, the absorption tower system also includes a flushing unit 600, which is arranged on the base 310, and there are at least two flushing units 600, and the slurry observation window 200 and the foam observation window 300 are respectively configured with at least one flushing unit 600; the flushing unit 600 is used to flush the glass 330 of the slurry observation window 200 and the glass 330 of the foam observation window 300 to avoid residual liquid contamination or blocking the glass 330, thereby facilitating the operator to clearly and intuitively obtain the slurry liquid level height and foam height, and prevent blurred vision and accumulation of impurities.

[0063] Specifically, the flushing unit 600 in this embodiment includes a main pipe 610, a branch pipe 620 and a nozzle 630. One end of the branch pipe 620 is connected to the nozzle 630, and the other end of the branch pipe 620 is connected to the main pipe 610. Flushing water flows in the main pipe 610, and the nozzle 630 is set facing the glass 330.

[0064] The main pipe 610 is connected to an external process water pump, which can transport flushing water from the main pipe 610 to the nozzle 630 and spray it toward the glass 330, thereby cleaning the glass 330 and preventing foreign matter from accumulating and affecting the observation line of sight.

[0065] Preferably, the nozzles 630 and the branch pipes 620 in this embodiment are both provided in a plurality, and the nozzles 630 are provided in a one-to-one correspondence with the branch pipes 620, and the plurality of nozzles 630 are arranged at equal intervals. This can improve the efficiency of the rinsing unit 600 in rinsing the glass 330, avoid the occurrence of cleaning dead zones, and improve the cleaning effect.

[0066] In this embodiment, a solenoid valve 640 is provided on the main pipe 610 to control whether flushing water is used for flushing.

[0067] like Figure 1 As shown, in this embodiment, the absorption tower system also includes an image acquisition unit 700, an image processing unit 800, an image conversion unit 900 and a DCS (Distributed Control System, DCS) control unit. The image acquisition unit 700 is arranged in front of the slurry observation window 200 and the foam observation window 300. The image acquisition unit 700, the image processing unit 800, the image conversion unit 900 and the DCS control unit 1000 are signal-connected in sequence, and the DCS control unit 1000 is signal-connected to the defoaming agent unit 500.

[0068] The image acquisition unit 700 collects signals of the slurry liquid level height and foam height in real time, and transmits them to the DCS control unit 1000 after processing by the image processing unit 800 and the image conversion unit 900. The DCS control unit 1000 calculates the amount of defoaming agent required to process the foam, and controls the defoaming agent unit 500 to transport the required defoaming agent to the slurry circulation unit 400.

[0069] Specifically, the image acquisition unit 700 in this embodiment includes a first camera 710 and a second camera 720. The first camera 710 faces the slurry observation window 200, and the second camera 720 faces the foam observation window 300. The first camera 710 is used to collect the slurry liquid level and low-level foam height, and the second camera 720 is used to collect high-level foam height. The first camera 710 and the second camera 720 can transmit the collected data to the image processing unit 800. The image processing unit 800 transmits the processed signal to the image conversion unit 900 for signal conversion. Finally, the image conversion unit 900 sends the converted signal to the DCS control unit 1000 in real time. The DCS control unit 1000 calculates the amount of defoaming agent required to treat the foam and controls the defoaming agent unit 500 to transport the required defoaming agent to the slurry circulation unit 400.

[0070] Optionally, the absorption tower system in this embodiment further includes a protective cover, wherein the first camera 710 and the second camera 720 are disposed within the protective cover. The protective cover is a light-proof structure, and the first camera 710 and the second camera 720 are both connected to the inner wall of the protective cover. The provision of the protective cover can prevent external light sources from interfering with the images captured by the first camera 710 and the second camera 720, thereby improving the accuracy of the slurry level and foam height.

[0071] like Figure 1 As shown, the absorption tower system also includes a spray assembly 110. The slurry circulation unit 400 includes a first slurry circulation pipeline 410, a second slurry circulation pipeline 420 and a circulation pump 430. Among them, the spray assembly 110 is arranged inside the absorption tower 100. One end of the first slurry circulation pipeline 410 is connected to the slurry in the absorption tower 100, and the other end is connected to the inlet of the circulation pump 430; one end of the second slurry circulation pipeline 420 is connected to the outlet of the circulation pump 430, and the other end is connected to the spray assembly 110. The defoaming agent unit 500 is connected to the first slurry circulation pipeline 410 and / or the second slurry circulation pipeline 420 to mix the defoaming agent in the defoaming agent unit 500 with the slurry in the first slurry circulation pipeline 410 and / or the slurry in the second slurry circulation pipeline 420.

[0072] In this way, by setting up the first slurry circulation pipeline 410, the second slurry circulation pipeline 420 and the circulation pump 430, the slurry in the absorption tower 100 can be transported from a low position to a high position for circulation. The defoaming agent in the defoaming agent unit 500 can be mixed with the slurry in the first slurry circulation pipeline 410, or mixed with the slurry in the second slurry circulation pipeline 420, or mixed with the slurry in the first slurry circulation pipeline 410 and the slurry in the second slurry circulation pipeline 420 at the same time. Finally, the mixed defoaming agent and slurry are evenly sprayed onto the foam layer or liquid surface in the absorption tower 100 through the spray assembly 110, thereby being able to treat the foam on the surface of the slurry. There is no need for the step of manually and continuously adding defoaming agent to the pit in the prior art, which reduces the workload of the operators and saves labor costs. At the same time, through the setting of the spray component 110, the mixed slurry and defoaming agent can be evenly sprayed onto the foam layer or liquid surface, increasing the reaction area, improving the defoaming efficiency, reducing safety hazards, and improving safety.

[0073] Optionally, the spray assembly 110 in this embodiment has multiple nozzles arranged at equal intervals, and the multiple nozzles are all set toward the foam layer, thereby improving the uniformity of spraying the mixed slurry and defoaming agent, improving the defoaming efficiency, and avoiding the occurrence of defoaming dead zones.

[0074] like Figure 1 As shown, the defoaming agent unit 500 in this embodiment includes a storage tank 510, a first defoaming agent pipeline 520 and a second defoaming agent pipeline 530, one end of the first defoaming agent pipeline 520 is connected to the first slurry circulation pipeline 410, and the other end is connected to the storage tank 510; one end of the second defoaming agent pipeline 530 is connected to the second slurry circulation pipeline 420, and the other end is connected to the storage tank 510.

[0075] Such an arrangement enables the defoaming agent in the storage tank 510 to be transported along the first defoaming agent pipeline 520 to the first slurry circulation pipeline 410 to be mixed with the slurry, and the defoaming agent in the storage tank 510 to be transported along the second defoaming agent pipeline 530 to the second slurry circulation pipeline 420 to be mixed with the slurry.

[0076] Furthermore, the defoaming agent unit 500 in this embodiment further includes a delivery pump 550 and a third defoaming agent pipeline 540. One end of the third defoaming agent pipeline 540 is connected to the delivery pump 550, and the other end is connected to the storage tank 510. In this way, the defoaming agent in the storage tank 510 can be delivered to the first defoaming agent pipeline 520 and / or the second defoaming agent pipeline 530 through the third defoaming agent pipeline 540 under the drive of the delivery pump 550.

[0077] Furthermore, the absorption tower system in this embodiment also includes a first control valve 560, a second control valve 570 and a third control valve 580. The first control valve 560 is arranged on the first defoaming agent pipeline 520, the second control valve 570 is arranged on the second defoaming agent pipeline 530, and the third control valve 580 is arranged on the third defoaming agent pipeline 540.

[0078] By configuring the first control valve 560 and the second control valve 570, operators can choose, based on actual needs, whether to mix the defoaming agent with the slurry in the first slurry circulation line 410, the slurry in the second slurry circulation line 420, or to mix the defoaming agent with the slurries in both lines simultaneously, thereby improving flexibility and applicability. Furthermore, by controlling the openings of the first control valve 560 and the second control valve 570, the flow rate of the defoaming agent can be controlled to ensure that the defoaming agent can be adjusted according to actual needs.

[0079] In this embodiment, the defoaming agent in the first defoaming agent pipeline 520 is preferably mixed with the slurry in the first slurry circulation pipeline 410, that is, the defoaming agent is preferably mixed with the slurry at the inlet of the circulation pump 430, which can improve the uniformity of the mixing of the slurry and the defoaming agent, increase the mixing time, and improve the defoaming efficiency.

[0080] Of course, the actual operating conditions of some factories do not allow the defoaming agent to be mixed with the slurry at the inlet of the circulation pump 430. Therefore, the solution of mixing the defoaming agent in the second defoaming agent pipeline 530 with the slurry in the second slurry circulation pipeline 420 can be beneficial to actual construction operations and improve construction efficiency.

[0081] Optionally, the delivery pump 550 in this embodiment is a variable frequency pump, which can change the flow rate of the defoaming agent delivery according to actual needs. Flow meters are provided on both the first defoaming agent pipeline 520 and the second defoaming agent pipeline 530 to monitor the actual flow rate of the defoaming agent being delivered.

[0082] After the foam in the absorption tower 100 is removed, the operator can stop the delivery of the defoaming agent by closing the first control valve 560 and the second control valve 570 and stopping the delivery pump 550 .

[0083] Optionally, the first control valve 560 , the second control valve 570 and the third control valve 580 in this embodiment can all be configured as common electric control valves or pneumatic control valves on the market.

[0084] Optionally, in this embodiment, the first defoamer pipeline 520, the second defoamer pipeline 530, and the slurry circulation pipeline 410 form a group of pipelines, and the pipelines may be 1 to n groups. That is, the first defoamer pipeline 520, the second defoamer pipeline 530, and the slurry circulation pipeline 410 form a group of pipelines. Operators may set up multiple such groups of slurry circulation pipelines based on actual needs. For example, the defoamer pipelines may be set up in two, three, or other groups, which will not be further described here.

[0085] The DCS control unit 1000 in this embodiment calculates the amount of defoaming agent required to treat the foam, and controls the delivery pump 550 in the defoaming agent unit 500 to deliver the required defoaming agent to the slurry circulation unit 400 to mix the defoaming agent and the slurry, and finally drives it to the spray assembly 110 by the circulation pump 430.

[0086] like Figure 1 As shown, the absorption tower system in this embodiment also includes a demister 120, which is arranged inside the absorption tower 100 and above the spray assembly 110; a flue gas outlet is opened at the top of the absorption tower 100, and the demister 120 is arranged opposite the flue gas outlet.

[0087] like Figure 1 As shown, the absorption tower system further includes a gas-liquid distributor 130 , which is disposed inside the absorption tower 100 and below the spray assembly 110 .

[0088] This embodiment also provides a method for automatically controlling the foam in an absorption tower. The method is applied to the above-mentioned absorption tower system. The method comprises the following steps:

[0089] Get the slurry level height and foam height.

[0090] Specifically, the slurry level height and the low-level foam height are acquired in real time by the first camera 710 , and the high-level foam height is acquired in real time by the second camera 720 .

[0091] The image acquisition unit 700 collects signals of the slurry liquid level height and foam height in real time, and transmits the signals of the slurry liquid level height and foam height to the image processing unit 800. The image processing unit 800 processes the signals and transmits the processed signals to the image conversion unit 900. The image conversion unit 900 converts the signals and sends them to the DCS control unit 1000 in real time. The DCS control unit 1000 calculates the amount of defoaming agent required to treat the foam according to the defoaming agent addition amount Q algorithm, and controls the defoaming agent unit 500 to transport the required defoaming agent to the slurry circulation unit 400.

[0092] The slurry liquid level and foam height are calculated to obtain the required amount of defoamer.

[0093] Specifically, the defoamer addition amount Q algorithm is as follows:

[0094] Q=2k1x 2 +5k2x+C; among them,

[0095] Q is the amount of defoamer to be added to the absorption tower 100;

[0096] k1 is the influence coefficient of gypsum purity;

[0097] k2 is the influence coefficient of slurry settling time;

[0098] C is Cl in the slurry - Comprehensive influence coefficient of concentration and COD concentration;

[0099] x is the absolute height of the foam;

[0100] x=h1-h2;

[0101] h1 is the foam height; h2 is the slurry level height.

[0102] For example, the current slurry level observed by the slurry observation window 200 is 9.5m, and the foam height observed by the foam observation window 300 is 10.5m. - The comprehensive influence coefficient value k2 of concentration and COD concentration is temporarily set to 1. - The combined influence coefficient C of concentration and COD concentration, that is, the influence coefficient C of slurry settling time, is tentatively set at 4 liters. In this way, Q can be calculated as Q = 2 × 1.5 (10.5-9.5) 2 +5×1×(10.5-9.5)+4=12 (liters).

[0103] The defoaming agent unit 500 is controlled to add the required amount of defoaming agent to the slurry circulation unit 400 .

[0104] Specifically, the DCS control unit 1000 can control the delivery pump 550 so that the delivery pump 550 delivers the calculated defoaming agent addition amount Q to the slurry circulation unit 400 .

[0105] The slurry circulation unit 400 is controlled to spray the mixed slurry and defoaming agent onto the foam in the absorption tower 100 .

[0106] Specifically, the DCS control unit 1000 can control the circulation pump 430 so that the circulation pump 430 can spray the mixed slurry and defoaming agent together to the foam in the absorption tower 100 through the spray assembly 110 .

[0107] The method for automatically controlling the foam in the absorption tower has simple steps, saves labor costs, can monitor the liquid level and foam height of the absorption tower, and accurately calculate the absolute height of the foam, thereby avoiding overflow of the absorption tower and excessive or insufficient defoaming agent, saving costs and improving defoaming work efficiency.

[0108] Obviously, the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

[0109] Note that throughout this specification, references to terms such as "some embodiments" and "other embodiments" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. Throughout this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. Absorption tower system, characterized in that, include: An absorption tower (100), a slurry observation window (200) and a foam observation window (300), wherein the slurry observation window (200) and the foam observation window (300) are both arranged on the outer wall of the absorption tower (100), and along the height direction of the absorption tower (100), the slurry observation window (200) and the foam observation window (300) are staggered; the upper edge of the slurry observation window (200) and the lower edge of the foam observation window (300) are at the same height; and a scale is provided on each of the slurry observation window (200) and the foam observation window (300); a slurry circulation unit (400), the slurry circulation unit (400) being in communication with the slurry in the absorption tower (100); A defoaming agent unit (500) is provided, wherein the defoaming agent is stored in the defoaming agent unit (500), and the defoaming agent unit (500) is connected to the slurry circulation unit (400) so that the defoaming agent can be mixed with the slurry in the slurry circulation unit (400) and sprayed onto the foam.

2. The absorption tower system according to claim 1, characterized in that The slurry observation window (200) and the foam observation window (300) have the same structure.

3. The absorption tower system according to claim 2, characterized in that The foam observation window (300) comprises a base (310) and a flange (320); a mounting hole is provided on the outer wall of the absorption tower (100); the base (310) is mounted at the mounting hole; and the flange (320) is arranged on a side of the base (310) away from the mounting hole.

4. The absorption tower system according to claim 3, characterized in that The foam observation window (300) further comprises glass (330), a groove is formed on the flange (320), and the glass (330) is embedded in the groove.

5. The absorption tower system according to claim 4, characterized in that The foam observation window (300) further comprises a cover plate (340) and a fixing member (350); a through hole is provided on the cover plate (340); the area of the through hole is smaller than the area of the glass (330); and the cover plate (340) is detachably connected to the flange (320) via the fixing member (350).

6. The absorption tower system according to claim 4, characterized in that The absorption tower system further comprises a flushing unit (600), wherein the flushing unit (600) is arranged on the base (310), at least two flushing units (600) are provided, and the slurry observation window (200) and the foam observation window (300) are respectively equipped with at least one flushing unit (600); The flushing unit (600) is used to flush the glass (330) of the slurry observation window (200) and the glass (330) of the foam observation window (300).

7. The absorption tower system according to claim 6, characterized in that The flushing unit (600) comprises a main pipe (610), a branch pipe (620) and a nozzle (630). One end of the branch pipe (620) is connected to the nozzle (630), and the other end of the branch pipe (620) is connected to the main pipe (610). Flushing water flows in the main pipe (610), and the nozzle (630) is arranged facing the glass (330).

8. The absorption tower system according to claim 7, characterized in that The nozzle (630) and the branch pipe (620) are both provided in plurality, and the nozzle (630) and the branch pipe (620) are provided in a one-to-one correspondence, and the plurality of nozzles (630) are provided at equal intervals.

9. The absorption tower system according to claim 7, characterized in that The main pipe (610) is provided with a solenoid valve (640).

10. The absorption tower system according to claim 1, characterized in that The absorption tower system further comprises an image acquisition unit (700), an image processing unit (800), an image conversion unit (900) and a DCS control unit (1000); the image acquisition unit (700) is arranged in front of the slurry observation window (200) and the foam observation window (300); the image acquisition unit (700), the image processing unit (800), the image conversion unit (900) and the DCS control unit (1000) are sequentially signal-connected; and the DCS control unit (1000) is signal-connected to the defoaming agent unit (500); The image acquisition unit (700) collects signals of the slurry liquid level height and foam height in real time, and transmits the signals to the DCS control unit (1000) after being processed by the image processing unit (800) and the image conversion unit (900). The DCS control unit (1000) calculates the amount of defoaming agent required for foam processing and controls the defoaming agent unit (500) to deliver the required defoaming agent to the slurry circulation unit (400).

11. The absorption tower system according to claim 10, characterized in that The image acquisition unit (700) comprises a first camera (710) and a second camera (720), wherein the first camera (710) faces the slurry observation window (200), and the second camera (720) faces the foam observation window (300), the first camera (710) is used to acquire the slurry level and low-level foam height, and the second camera (720) is used to acquire the high-level foam height.

12. The absorption tower system according to claim 11, characterized in that The absorption tower system further comprises a protective cover, wherein the first camera (710) and the second camera (720) are arranged in the protective cover, and the protective cover is a light-proof structure.

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