Acid-base absorption tower

Abstract

The utility model relates to an acid-base absorption tower. The acid-base absorption tower comprises an absorption tower main body, a spraying mechanism, a plurality of flushing mechanisms, a spraying water tank, a medicine mixing water tank and a pipeline assembly. During use, comprehensive circulating spraying of waste gas in the shell is realized through the spraying water tank, the spraying pipe and the spraying nozzles, so that the absorption efficiency of the waste gas is improved, and the treatment cost of the waste gas is reduced; when the pH value of the absorption liquid in the spraying water tank reaches a preset pH value close to neutral, the absorption liquid in the spraying water tank is discharged into the liquid medicine mixing tank, and the absorption liquid close to neutral in the liquid medicine mixing tank is sprayed to the filler assembly and the demisting structure layer by utilizing the pipeline assembly and the plurality of flushing mechanisms, so that the filler assembly and the demisting structure layer are automatically cleaned and maintained; the waste gas treatment efficiency is further improved, and the waste gas treatment cost is further reduced; the absorption liquid meeting the concentration requirement in the liquid medicine mixing tank is automatically added into the spraying water tank through the pipeline assembly, so that the waste gas treatment efficiency is further improved, and the labor cost is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of spray tower technology, and in particular to an acid-base absorption tower. Background Technology

[0002] Absorption towers, also known as spray towers, are a type of spray-type tray scrubber. This equipment is highly effective in treating industrial waste gas and wastewater, and is suitable for absorbing and purifying acid and alkali mist gases generated during the production of large equipment in industries such as instrumentation, electroplating, and metallurgy.

[0003] An absorption tower with internal packing or trays and nozzles allows liquid to be sprayed into a mist or raindrops. Gas enters from the bottom of the tower and comes into close contact with the mist or raindrops for mass transfer, absorbing the easily soluble components in the gas. While structurally simple, this type of tower is prone to packing blockage, has high resistance, and is inconvenient to operate and maintain. For acidic and alkaline waste gases from a workshop, directly entering the spray tower through pipes will cause precipitation upon reaction with the absorbent, clogging the packing and reducing the amount of waste gas that can be treated. Furthermore, over time, the concentration of the absorbent in the aforementioned spray tower will decrease, leading to a decline in absorption efficiency and reduced treatment capacity. Utility Model Content

[0004] Therefore, it is necessary to provide an acid-base absorption tower with easy-to-clean and easy-to-maintain packing material that can improve the efficiency of waste gas treatment, in order to address the problems of easy clogging and inconvenient maintenance of packing material during the above-mentioned waste gas treatment process, as well as the problem of decreasing absorption efficiency due to the decreasing concentration of absorbent liquid as the treatment time extends.

[0005] An acid-base absorption tower, comprising:

[0006] The absorption tower body includes a shell, multiple packing assemblies, and a demister structure layer. The shell has a first end and a second end facing each other. The demister structure layer and the multiple packing assemblies are sequentially spaced within the shell along the direction from the first end to the second end. An exhaust port is provided at the first end, and the exhaust port is located on the side of the demister structure layer facing away from the packing assemblies. An air inlet and a water outlet are provided at the second end, and the air inlet is located on the bottommost packing assembly facing the second end.

[0007] A spraying mechanism includes a spraying pipeline and a spraying nozzle disposed on the spraying pipeline; one end of the spraying pipeline with the spraying nozzle is located inside the housing and is located on the side of at least one of the packing assemblies facing the first end;

[0008] Multiple flushing mechanisms are provided, each corresponding to one of the demisting structural layer and one of the multiple packing assemblies. Each flushing mechanism includes a flushing pipeline and flushing nozzles spaced apart on the flushing pipeline. One end of the flushing pipeline with the flushing nozzle is located inside the housing. The spray nozzle of each flushing nozzle is oriented towards the corresponding demisting structural layer or packing assembly.

[0009] The spray tank has a return port, a drain port, a spray outlet and a chemical dosing port on its side wall; the return port is connected to the drain port; the spray outlet is connected to the spray pipeline.

[0010] The mixing tank has a drain outlet at the bottom and a return outlet and a replenishment outlet at the top; the side wall of the mixing tank also has an outlet; the return outlet is connected to the drain outlet; the outlet is connected to the dosing port and multiple flushing pipes respectively.

[0011] The piping assembly is configured to pump liquid from the spray tank through the outlet into the spray pipeline or to transport liquid from the spray tank through the drain outlet to the return outlet. It is also configured to pump liquid from the mixing tank through the outlet into the flushing pipeline or to transport liquid from the mixing tank through the outlet to the dosing port.

[0012] The aforementioned acid-base absorption tower, during operation, utilizes a spray tank, spray pipes, and spray nozzles to achieve comprehensive circulating spraying of the waste gas within the shell. This improves both the absorption efficiency of the waste gas and the utilization efficiency of the absorbent liquid through circulating spraying, thereby reducing the waste gas treatment cost. When the pH value of the absorbent liquid in the spray tank reaches a preset value close to neutral, the absorbent liquid in the spray tank needs to be discharged sequentially through the drain outlet, pipeline assembly, and return outlet into the mixing tank. Then, the pipeline assembly is used to transport the nearly neutral absorbent liquid in the mixing tank to multiple flushing pipes, and the corresponding flushing nozzles spray these nearly neutral absorbent liquids onto their respective packing assemblies or demister structures to flush the packing. The system automatically cleans and maintains the packing components and demister layer, preventing clogging and improving waste gas treatment efficiency. Furthermore, the near-neutral pH absorbent from the spray tank is recycled for rinsing the packing components and demister layer, further reducing waste gas treatment costs. Absorbent agents or a mixture of absorbent agents and water are added to the mixing tank via the replenishment port and mixed manually or automatically to obtain a suitable absorbent solution. This solution is then automatically added to the spray tank via the pipeline assembly, further improving waste gas treatment efficiency and effectively reducing labor costs. Therefore, the aforementioned acid-base absorption tower combines extremely high waste gas treatment efficiency with very low waste gas treatment costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the acid-base absorption tower in a preferred embodiment of the present invention;

[0014] Figure 2 for Figure 1 The diagram shows the structural schematic of the main body of the acid-base absorption tower.

[0015] Figure 3 for Figure 1 The diagram shows the structure of the spray tank in the acid-base absorption tower.

[0016] Figure 4 for Figure 1 A top view of the spray mechanism in the acid-base absorption tower shown.

[0017] Figure 5 for Figure 1 A top view of the flushing mechanism in the acid-base absorption tower shown.

[0018] Labeling Explanation: 100, Acid-Base Absorption Tower; 110, Absorption Tower Body; 111, Shell; 1111, First End; 1112, Second End; 1113, Exhaust Port; 1114, Air Inlet; 1115, Water Outlet; 1116, Inclined Base Plate; 112, Packing Assembly; 113, Demisting Structure Layer; 120, Spraying Mechanism; 121, Spray Pipeline; 1211, First Spray Pipe; 1212, Second Spray Pipe; 122, Spray Nozzle; 130, Flushing Mechanism; 131, Flushing Pipeline; 1311, First Flushing Pipe; 1312, Second Flushing Pipe; 132, Flushing Nozzle; 140, Spray Water Tank; 141, Return Port; 142, Drain Port; 14 3. Spray outlet; 144. Dosing port; 145. Overflow port; 150. Mixing tank; 151. Drain; 152. Return port; 153. Replenishment port; 154. Outlet; 160. Piping assembly; 161. Main spray pipe; 162. Spray pump; 163. Dosing and flushing pump; 164. First pipe; 165. First switch valve; 166. Second pipe; 167. Second switch valve; 168. Third pipe; 169. Fourth pipe; 1601. Third switch valve; 1602. Fifth pipe; 1603. Fourth switch valve; 1604. Sixth pipe; 1605. Fifth switch valve; 170. Control device; 180. pH sensor; 190. Stirring mechanism. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0020] Unless otherwise defined, 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. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] When describing positional relationships, unless otherwise specified, when an element is referred to as being "on" another element, it may be directly on the other element or there may be intermediate elements. It is also understood that when an element is referred to as being "between" two elements, it may be the only one between the two elements, or there may be one or more intermediate elements.

[0022] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0023] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.

[0024] Please see Figure 1 In a preferred embodiment of the present invention, the acid-base absorption tower 100 includes an absorption tower body 110, a spraying mechanism 120, multiple rinsing mechanisms 130, a spraying water tank 140, a mixing water tank 150, and a pipeline assembly 160.

[0025] Please refer to the following: Figure 2The absorption tower body 110 includes a shell 111, multiple packing assemblies 112, and a demister structure layer 113. The shell 111 has a first end 1111 and a second end 1112 facing each other. The demister structure layer 113 and the multiple packing assemblies 112 are arranged sequentially and at intervals within the shell 111 along the direction from the first end 1111 to the second end 1112. The first end 1111 has an exhaust port 1113, and the exhaust port 1113 is located on the side of the demister structure layer 113 away from the packing assembly 112. The second end 1112 has an air inlet 1114 and a water outlet 1115, and the air inlet 1114 is located on the side of the lowest packing assembly 112 facing the second end 1112. When the main body 110 of the absorption tower is in a horizontal position, the first end 1111 and the second end 1112 are the upper and lower ends of the shell 111, respectively. Therefore, the direction from the first end 1111 to the second end 1112 is vertically downward, and similarly, the direction of the line connecting the first end 1111 and the second end 1112 is vertical. The inlet 1114 is used to input waste gas into the shell 111, and the outlet 1113 is used to absorb and treat the waste gas for acid and alkali before discharging it outside the shell 111. Therefore, the waste gas flows from the lower right to the upper left within the shell 111.

[0026] The spraying mechanism 120 includes a spray pipe 121 and spray nozzles 122 disposed on the spray pipe 121. One end of the spray pipe 121 with the spray nozzles 122 is located inside the housing 111 and is located on the side of at least one packing assembly 112 facing the first end 1111. Thus, the spraying mechanism 120 is located above at least one packing assembly 112.

[0027] Multiple flushing mechanisms 130 correspond one-to-one with the demisting structural layer 113 and multiple packing assemblies 112. Each flushing mechanism 130 includes a flushing pipe 131 and flushing nozzles 132 spaced apart on the flushing pipe 131. One end of the flushing pipe 131 with the flushing nozzle 132 is located inside the housing 111. The spray nozzle of each flushing nozzle 132 is oriented towards the corresponding demisting structural layer 113 or packing assembly 112. The rinsing mechanism 130 can be located below or above the corresponding packing assembly 112 or demisting structure layer 113. When the rinsing mechanism 130 is located below the corresponding packing assembly 112 or demisting structure layer 113, the spray nozzle of the rinsing nozzle 132 is set upward; when the rinsing mechanism 130 is located above the corresponding packing assembly 112 or demisting structure layer, the spray nozzle of the rinsing nozzle 132 is set downward, so as to ensure that the rinsing nozzle 132 can accurately spray the liquid in the rinsing pipe onto the corresponding packing assembly 112 or demisting structure layer 113, so as to effectively rinse and clean the packing assembly 112 or demisting structure layer 113.

[0028] Please refer to the following: Figure 3The side wall of the spray tank 140 is provided with a return port 141, a drain port 142, a spray outlet 143, and a chemical dosing port 144. The return port 141 is connected to the water outlet 1115. The spray outlet 143 is connected to the spray pipe 121.

[0029] The mixing tank 150 has a drain port 151 at its bottom and a return port 152 and a replenishment port 153 at its top. The side wall of the mixing tank 150 also has an outlet port 154. The return port 152 is connected to the drain port 142. The outlet port 154 is connected to the dosing port 144 and multiple flushing pipes 131. The drain port 151 is used to discharge the accumulated sludge in the mixing tank 150 after a preset amount has been reached, ensuring effective usable space within the mixing tank 150 and maintaining the cleanliness of the absorbent solution. The replenishment port 153 is used to add absorbent and water to the mixing tank 150; the absorbent and water can be added separately or simultaneously.

[0030] The piping assembly 160 is configured to pump liquid in the spray tank 140 through the outlet 1115 into the spray pipe or to transport liquid in the spray tank 140 through the drain outlet 142 to the return outlet 152. It is also configured to pump liquid in the mixing tank 150 through the outlet 154 into the flushing pipeline 131 or to transport liquid in the mixing tank 150 through the outlet 154 to the dosing port 144.

[0031] Thus, the operation of the pipeline assembly 160 can switch the working state of the acid-base absorption tower 100 to spray mode, drainage mode, flushing mode and dosing mode.

[0032] When the acid-base absorption tower 100 is in spray mode, the absorbent liquid in the spray tank 140 is transported to the spray pipe through the outlet 1115, and then sprayed into the shell 111 through multiple spray nozzles 122 to comprehensively spray the waste gas in the shell 111, thereby improving the absorption efficiency of the waste gas. The absorbent liquid in the shell 111 falls to the bottom of the shell 111 under its own gravity, and then enters the spray tank 140 through the outlet 1115 and the return port 141 in sequence, forming a spray cycle, which improves the utilization efficiency of the absorbent liquid and reduces the treatment cost of the waste gas.

[0033] When the pH value of the absorbent in the spray tank 140 reaches a preset pH value close to neutral, the working mode of the acid-base absorption tower 100 is switched to the discharge mode. At this time, the absorbent in the spray tank 140 is discharged into the mixing tank 150 through the drain port 142, the pipeline assembly 160 and the return port 152 in sequence.

[0034] When the acid-base absorption tower 100 is in flushing mode, the absorption liquid with a pH close to neutral in the mixing tank 150 is transported to multiple flushing pipes through the pipeline assembly 160. The absorption liquid with a pH close to neutral is sprayed onto the corresponding packing assembly 112 or demister structure layer 113 through the corresponding flushing nozzles 132 to flush the deposits on the packing assembly 112 and demister structure layer 113, thereby achieving automatic cleaning and maintenance of the packing assembly 112 and demister structure layer 113, preventing them from clogging, and further improving the treatment efficiency of waste gas. Furthermore, by recycling the absorption liquid with a pH close to neutral in the spray tank 140 for flushing the packing assembly 112 and demister structure layer 113, the treatment cost of waste gas is further reduced.

[0035] When the acid-base absorption tower 100 is in the dosing mode, absorbent is added to the mixing tank 150 through the replenishment port 153, or absorbent and water are added simultaneously. The mixture is then stirred manually or automatically to obtain an absorbent solution that meets the requirements. The absorbent solution in the mixing tank 150 is then transported to the dosing port 144 through the outlet port 154 via the pipeline assembly 160, realizing automatic dosing into the spray tank 140, further improving the efficiency of waste gas treatment and effectively reducing labor costs.

[0036] Therefore, the aforementioned acid-base absorption tower 100 combines extremely high waste gas treatment efficiency with very low waste gas treatment cost.

[0037] Please refer to the following: Figure 4 In some embodiments, the spray pipe 121 includes a first spray pipe 1211 and a second spray pipe 1212 that are interconnected. One end of the first spray pipe 1211 is connected to the water outlet 1115. Both the first spray pipe 1211 and the second spray pipe 1212 are equipped with spray nozzles 122. There may be one or more second spray pipes 1212. When there are multiple second spray pipes 1212, they may be interconnected or each may only be connected to the first spray pipe 1211.

[0038] Thus, the spray pipe 121 formed by the cross connection of the first spray pipe 1211 and the second spray pipe 1212 allows multiple spray nozzles 122 to be arranged at intervals in the transverse plane inside the housing 111, so as to spray the absorbent liquid into the housing 111 more comprehensively and evenly, thereby improving the spraying effect on the exhaust gas and further improving the absorption rate of the exhaust gas.

[0039] In some embodiments, there are multiple spraying mechanisms 120. Each spraying mechanism 120 corresponds one-to-one with a multiple packing assembly 112. Each spraying mechanism 120 is located on the side of the corresponding packing assembly 112 facing the first end 1111.

[0040] Thus, each spraying mechanism 120 is positioned above the corresponding packing assembly 112 to spray the absorbent liquid from above onto the corresponding packing assembly 112, thereby ensuring a high concentration of absorbent liquid on each packing assembly 112 during use, and further improving the exhaust gas absorption rate.

[0041] Please refer to the following: Figure 5 In some embodiments, the flushing conduit 131 includes a first flushing pipe 1311 and a second flushing pipe 1312 that are interconnected. One end of the first flushing pipe 1311 is connected to the liquid outlet 154. Both the first flushing pipe 1311 and the second flushing pipe 1312 are provided with flushing nozzles 132. There may be one or more second flushing pipes 1312. When there are multiple second flushing pipes 1312, they may be interconnected or each may only be connected to the first flushing pipe 1311.

[0042] Thus, the flushing pipe 131, formed by the cross connection of the first flushing pipe 1311 and the second flushing pipe 1312, arranges multiple spray nozzles 122 at intervals in the transverse surface of the housing 111, so as to spray the absorbent liquid with a pH value close to neutral onto the corresponding packing assembly 112 or the demisting structure layer 113 more comprehensively and evenly, thereby further improving the flushing and cleaning effect on the packing assembly 112 and the demisting structure layer 113, and further improving the absorption rate of exhaust gas.

[0043] In some embodiments, the piping assembly 160 includes a spray manifold 161 and a spray pump 162 disposed on the spray manifold 161. One end of the spray manifold 161 is connected to a spray pipe, and the other end passes through the outlet 1115 and extends into the bottom of the spray tank 140.

[0044] When the acid-base absorption tower 100 is in spray mode, the absorption liquid in the spray water tank 140 is drawn into the spray pipeline 121 through the spray main pipe 161 by the spray pump 162, and then sprayed into the shell 111 through multiple spray nozzles 122, so as to realize the work of circulating the absorption liquid into the shell 111.

[0045] In some embodiments, the piping assembly 160 includes a dosing flushing pump 163, a first pipe 164 with a first switching valve 165, a second pipe 166 with a second switching valve 167, a third pipe 168, a fourth pipe 169 with a third switching valve 1601, a fifth pipe 1602 with a fourth switching valve 1603, and a sixth pipe 1604 with a fifth switching valve 1605. One end of the first pipe 164 is connected to a drain outlet 142, and the other end is connected to the inlet of the dosing flushing pump 163. One end of the second pipe 166 is connected to an outlet 154, and the other end is connected to the inlet of the dosing flushing pump 163. One end of the third pipe 168 is connected to the outlet of the dosing flushing pump 163, and the other end is connected to the dosing port 144 via the fourth pipe 169 and to a plurality of flushing pipes 131 via the fifth pipe 1602. One end of the sixth pipe 1604 is connected to the outlet of the dosing flushing pump 163, and the other end is connected to the return port 152.

[0046] Thus, the drain outlet 142, the first pipe 164, the dosing flushing pump 163, the sixth pipe 1604, and the return outlet 152 are connected in sequence to form a drainage path for the absorbent in the spray tank 140 to be discharged into the mixing tank 150; the outlet 154, the second pipe 166, the dosing flushing pump 163, the third pipe 168, the fourth pipe 169, and the dosing outlet 144 are connected in sequence to form a dosing path for adding the absorbent in the mixing tank 150 into the spray tank 140; the outlet 154, the second pipe 166, the dosing flushing pump 163, the third pipe 168, the fifth pipe, and multiple flushing pipes 131 are connected in sequence to form a flushing path for flushing the packing assembly 112 and the demisting structure layer 113 using the absorbent with a near-neutral pH value in the mixing tank 150.

[0047] Meanwhile, the switching of the tubing assembly between the drainage passage, the dosing passage, and the flushing passage can be achieved by manually or automatically controlling the opening and closing of the first switching valve 165, the second switching valve 167, the third switching valve 1601, the fourth switching valve 1603, and the fifth switching valve 1605.

[0048] Furthermore, in some embodiments, the acid-base absorption tower 100 also includes a control device 170, which is connected to a first switching valve 165, a second switching valve 167, a third switching valve 1601, a fourth switching valve 1603, and a fifth switching valve 1605, respectively, and is used to control the opening and closing of the first switching valve 165, the second switching valve 167, the third switching valve 1601, the fourth switching valve 1603, and the fifth switching valve 1605, so as to switch the pipeline assembly 160 to a drainage mode, a dosing mode, or a flushing mode.

[0049] In drainage mode, the first switch valve 165 and the fifth switch valve 1605 are open, while the second switch valve 167, the third switch valve 1601, and the fourth switch valve 1603 are all closed. In chemical dosing mode, the second switch valve 167 and the third switch valve 1601 are open, while the first switch valve 165, the fourth switch valve 1603, and the fifth switch valve 1605 are all closed. In flushing mode, the second switch valve 167 and the fourth switch valve 1603 are open, while the first switch valve 165, the third switch valve 1601, and the fifth switch valve 1605 are all closed.

[0050] Thus, the acid-base absorption tower 100 can automatically switch between drainage mode, dosing mode and flushing mode through the control device 170, eliminating the need for staff to manually start or close each switch valve, thereby further reducing the labor cost of waste gas treatment.

[0051] In some embodiments, the pickling absorption tower further includes a pH sensor 180. The pH sensor 180 is located inside the spray tank 140 and is used to detect the pH value of the liquid inside the spray tank 140 in real time.

[0052] Because the absorption efficiency of the absorbent liquid will gradually saturate during the waste gas treatment process, the waste gas treatment efficiency will also continuously decrease. Therefore, during the use of the acid-base absorption tower 100, the staff can use the pH detection device 180 to monitor the pH value of the absorbent liquid in the spray tank 140 in real time. When the pH value of the absorbent liquid in the spray tank 140 is detected to be lower than the preset pH value close to neutral, in order to ensure the waste gas treatment efficiency, the absorbent liquid in the spray tank 140 needs to be discharged into the mixing tank 150 through the drain passage. The absorbent agent is then added to the mixing tank 150 and mixed evenly to adjust the absorbent liquid concentration to meet the requirements. After that, the absorbent liquid that meets the requirements is added to the spray tank 140 through the dosing passage to continue the waste gas treatment.

[0053] Specifically, when the acid-base absorption tower 100 includes a control device 170, the control device 170 is connected to the pH detection element 180 and is used to control the opening and closing of the spray pump 162, the first switch valve 165, the dosing and flushing pump 163, the fifth switch valve 1605, the second switch valve 167 and the third switch valve 1601 respectively according to the pH value information, so as to realize the automatic switching of the acid-base absorption tower 100 to the spray mode, the drainage mode or the dosing mode. During the operation of the acid-base absorption tower 100, it can be operated for a long time without the need for frequent dosing by the staff, which greatly reduces the labor cost.

[0054] In some embodiments, the acid-base absorption tower 100 further includes a stirring mechanism 190. The stirring mechanism 190 is disposed within the mixing tank 150 and is used to stir and mix the liquid within the mixing tank 150. Specifically, the stirring mechanism 190 is disposed in the upper part of the mixing tank.

[0055] It should be noted that the stirring mechanism 190 is located in the upper part of the mixing tank, that is, the stirring mechanism 190 only stirs and mixes the liquid in the upper part of the mixing tank 150, so as to avoid stirring the sedimented sludge at the bottom of the mixing tank 150 and ensure that the purity of the absorbent in the mixing tank 150 is high.

[0056] The stirring mechanism 190 can be set up to stir and mix the absorbent liquid in the mixing tank 150, thereby reducing the labor intensity of the staff during the use of the acid-base absorption tower 100 and helping to further reduce labor costs.

[0057] In some embodiments, an overflow port 145 is provided on the side wall at the top of the spray tank 140. A mechanical float valve (not shown) is installed in the overflow port 145. The mechanical float valve can close the valve when the liquid level of the absorbent in the spray tank 140 is low to ensure the airtightness of the spray tank 140, and open the valve when the liquid level of the absorbent in the spray tank 140 is higher than a preset height, so that excess absorbent in the spray tank 140 can automatically overflow.

[0058] In some embodiments, the spray tank 140 is a hollow structure with a return port 141 at one end. The edge of the return port 141 is fixedly connected to the outer wall at the bottom, and the outlet 1115 is located inside the return port 141. In this way, the spray tank 140 is set against the outer wall of the shell 111, and part of the outer wall of the shell 111 can serve as the inner wall of the spray tank 140, ensuring that the absorbent in the absorption tower can directly enter the spray tank 140 through the outlet 1115 without going through connecting pipes, etc., effectively reducing the volume of the acid-base absorption tower 100 and reducing the amount of absorbent used in the spray mode.

[0059] Furthermore, in some embodiments, an inclined bottom plate 1116 is provided at the bottom of the bottom end, inclined relative to the direction from the first end 1111 to the second end 1112. The outlet 1115 is located on the side of the inclined bottom plate 1116 facing the first end 1111, and is at the lowest position of the inclined bottom plate 1116. When the absorption tower body 110 is on a horizontal plane, the inclined bottom plate 1116 is inclined downwards relative to the horizontal plane, and the outlet 1115 is located above the lowest position of the inclined bottom plate 1116. Specifically, the outlet 1115 is located on the upper surface of the inclined bottom plate 1116.

[0060] In this way, the absorbent liquid at the bottom of the shell 111 will flow towards the outlet 1115 along the inclined direction of the inclined bottom plate 1116 under its own gravity, so as to ensure that the absorbent liquid in the shell 111 can flow back to the spray tank 140 as much as possible, reduce the probability of the absorbent liquid remaining at the bottom of the shell 111, and effectively improve the utilization rate of the absorbent liquid.

[0061] Of course, in other embodiments, the bottom of the housing can be made into a funnel shape to ensure the complete drainage of the absorbent liquid inside the housing.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An acid-base absorber column characterized by, The application relates to an absorption tower body, a spraying mechanism, a plurality of flushing mechanisms, a spraying water tank and a mixed medicine water tank. The absorption tower body comprises a shell, a plurality of filler assemblies and a demisting structure layer; the shell has opposite first and second ends; the demisting structure layer and the plurality of filler assemblies are sequentially and spacedly arranged in the shell along a direction from the first end to the second end; the first end is provided with an exhaust port, and the exhaust port is located on a side of the demisting structure layer away from the filler assemblies; the second end is provided with an air inlet and a water outlet, and the air inlet is located on a side of the lowermost filler assembly facing the second end; The spraying mechanism comprises a spraying pipeline and spraying nozzles arranged on the spraying pipeline; one end of the spraying pipeline provided with the spraying nozzles is located in the shell and on a side of at least one filler assembly facing the first end; The plurality of flushing mechanisms correspond to the demisting structure layer and the plurality of filler assemblies one by one; the flushing mechanism comprises a flushing pipeline and flushing nozzles arranged on the flushing pipeline; one end of the flushing pipeline provided with the flushing nozzles is located in the shell; a water outlet of each flushing nozzle faces the corresponding demisting structure layer or filler assembly; The spraying water tank is provided with a backflow port, a drainage port, a spraying outlet and a medicine adding port on a side wall; the backflow port is communicated with the water outlet; the spraying outlet is communicated with the spraying pipeline; The mixed medicine water tank is provided with a sewage discharge port at a bottom end and a liquid return port and a supplement port at a top end; a side wall of the mixed medicine water tank is further provided with a liquid outlet port; the liquid return port is communicated with the drainage port; the liquid outlet port is communicated with the medicine adding port and the plurality of flushing pipelines respectively; The pipeline assembly is configured to pump liquid in the spraying water tank into the spraying pipeline through the water outlet or deliver liquid in the spraying water tank to the liquid return port through the drainage port, and is further configured to pump liquid in the mixed medicine water tank into the flushing pipeline through the liquid outlet port or deliver liquid in the mixed medicine water tank to the medicine adding port through the liquid outlet port.

2. The sour gas absorber of claim 1, wherein, The spraying pipeline comprises a first spraying pipe and a second spraying pipe which are cross-communicated with each other; one end of the first spraying pipe is communicated with the water outlet; the first spraying pipe and the second spraying pipe are both provided with spraying nozzles.

3. The sour gas absorber of claim 1 wherein, The spraying mechanism is a plurality of; the plurality of spraying mechanisms correspond to the plurality of filler assemblies one by one; each spraying mechanism is located on a side of the corresponding filler assembly facing the first end.

4. The sour gas absorber of claim 1 wherein, The flushing pipeline comprises a first flushing pipe and a second flushing pipe which are cross-communicated with each other; one end of the first flushing pipe is communicated with the liquid outlet port; the first flushing pipe and the second flushing pipe are both provided with flushing nozzles.

5. The sour gas absorber of claim 1 wherein, The pipeline assembly comprises a spraying main pipe and the spraying pump arranged on the spraying main pipe; one end of the spraying main pipe is communicated with the spraying pipe, and the other end is arranged in the water outlet and extends into the bottom of the spraying water tank.

6. The sour gas absorber of claim 1 wherein, The pipeline assembly comprises a medicine adding and flushing pump, a first pipe provided with a first switch valve, a second pipe provided with a second switch valve, a third pipe, a fourth pipe provided with a third switch valve, a fifth pipe provided with a fourth switch valve and a sixth pipe provided with a fifth switch valve; one end of the first pipe is communicated with the water outlet, and the other end is communicated with the inlet of the medicine adding and flushing pump; one end of the second pipe is communicated with the liquid outlet, and the other end is communicated with the inlet of the medicine adding and flushing pump; one end of the third pipe is communicated with the outlet of the medicine adding and flushing pump, and the other end is communicated with the medicine adding port through the fourth pipe and communicated with a plurality of flushing pipelines through the fifth pipe; one end of the sixth pipe is communicated with the outlet of the medicine adding and flushing pump, and the other end is communicated with the liquid return port.

7. The sour gas absorber of claim 6 wherein, The control device is connected with the first switch valve, the second switch valve, the third switch valve, the fourth switch valve and the fifth switch valve, and is used for controlling the opening and closing of the first switch valve, the second switch valve, the third switch valve, the fourth switch valve and the fifth switch valve, so as to switch the pipeline assembly to the liquid discharging mode, the medicine adding mode or the flushing mode. In the liquid discharging mode, the first switch valve and the fifth switch valve are in the open state, and the second switch valve, the third switch valve and the fourth switch valve are in the closed state; in the medicine adding mode, the second switch valve and the third switch valve are in the open state, and the first switch valve, the fourth switch valve and the fifth switch valve are in the closed state; in the flushing mode, the second switch valve and the fourth switch valve are in the open state, and the first switch valve, the third switch valve and the fifth switch valve are in the closed state.

8. The sour gas absorber of claim 1 wherein, The PH detection member is arranged in the spraying water tank and is used for detecting the PH value information of the liquid in the spraying water tank in real time; and / or The stirring mechanism is arranged in the medicine mixing tank and is used for stirring and uniformly mixing the liquid in the medicine mixing tank; and / or An overflow port is arranged in the side wall of the top end of the spraying water tank.

9. The sour gas absorber of claim 1 wherein, The spraying water tank is a hollow structure with the reflux port arranged at one end; the edge part of the reflux port is fixedly connected with the outer wall of the bottom end, and the water outlet is located in the reflux port.

10. The sour gas absorber of claim 9 wherein, The bottom part in the bottom end is provided with an inclined bottom plate which is arranged in the direction inclined to the second end with respect to the first end; the water outlet is located on the side of the inclined bottom plate towards the first end and is at the lowest position of the inclined bottom plate.

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