An extraction off-gas treatment system

Abstract

The utility model provides a kind of extraction tail gas treatment system, including air blower, caustic washing device and water washing device, the air outlet of air blower is connected with caustic washing device, caustic washing device includes caustic washing tower, spray component, lye supply component and circulating component, caustic washing tower side is communicated with air blower, spray component part is embedded in caustic washing tower inside and is communicated with lye supply component, the liquid inlet end of circulating component is communicated with the part below liquid level of caustic washing tower, the liquid outlet end of circulating component is communicated with spray component, the gas outlet end of caustic washing tower is communicated with water washing device, and water washing device is used to wash gas with water.The utility model provides extraction tail gas treatment system, by circulating caustic washing to gas, acidic material in gas is completely neutralized after being led to water washing device, then gas is washed again, so that gas meets emission standard and is discharged, effectively avoid environmental pollution.

Description

Technical Field

[0001] This utility model relates to the field of nickel-cobalt extraction technology, and in particular to an extraction tail gas treatment system. Background Technology

[0002] In metal purification, an extraction system is required to extract and purify the target substance. This is a unit operation that separates a mixture by utilizing the different solubilities of its components in solvents. The solute is transferred from one solvent to another based on the difference in solubility or partition coefficients of the substance in two immiscible (or slightly soluble) solvents. The target substance is then extracted using an organic phase as a carrier.

[0003] In the existing extraction process, acid is added and the temperature of the entire extraction is maintained at around 50°C. The extraction process generates gas containing acid mist, which will cause environmental pollution if emitted. Utility Model Content

[0004] In view of this, it is necessary to provide an extraction tail gas treatment system that can effectively treat acid mist in gases in the prior art.

[0005] This utility model provides an extraction exhaust gas treatment system, comprising: blower, An alkaline washing device includes an alkaline washing tower, a spray assembly, an alkaline solution supply assembly, and a circulation assembly. One side of the alkaline washing tower is connected to the blower. A portion of the spray assembly is embedded inside the alkaline washing tower and is connected to the alkaline solution supply assembly. The inlet end of the circulation assembly is connected to the portion of the alkaline washing tower below the liquid level, and the outlet end of the circulation assembly is connected to the spray assembly. The gas outlet of the alkali washing tower is connected to the water washing device, which is used to wash the gas.

[0006] In other feasible embodiments, a plurality of the alkaline washing devices are provided, and the plurality of alkaline washing devices are arranged in parallel with each other.

[0007] In other feasible embodiments, the alkaline washing tower is arranged vertically, and an air inlet communicating with the blower is opened near the bottom of the side wall of the alkaline washing tower. An air outlet communicating with the water washing device is opened at the top of the alkaline washing tower, and an insertion port for the spray assembly is opened near the top of the side wall of the alkaline washing tower.

[0008] In other feasible embodiments, the spray assembly includes a spray pipe and a plurality of spray heads. One end of the spray pipe extends into the embedded port. The spray heads are disposed on the portion of the spray pipe that extends into the alkaline washing tower and communicate with the interior of the spray pipe. The portion of the spray pipe located outside the alkaline washing tower is provided with a first inlet and a second inlet that are respectively connected to the alkaline solution supply assembly and the circulation assembly.

[0009] In other feasible embodiments, the alkali supply assembly includes an alkali storage tank and an alkali supply pump, wherein the alkali supply pump is connected to the alkali storage tank and the first inlet respectively, and can controllably supply alkali to the spray assembly.

[0010] In other feasible embodiments, the circulation assembly includes a circulation pump, the inlet of which is connected to the portion of the alkaline washing tower below the liquid level, and the outlet of which is connected to the second inlet, so that the liquid in the alkaline washing tower can be controllably drawn and sent to the spray assembly.

[0011] In other feasible embodiments, the circulation assembly includes a plurality of the circulation pumps connected in parallel with each other.

[0012] In other feasible embodiments, the side wall of the alkaline washing tower is provided with a drain outlet and a liquid replenishment outlet near the bottom. The alkaline washing device also includes a water supply tank storing neutral water and a water supply pump. The water supply tank is connected to the liquid replenishment outlet and is used to replenish neutral water into the alkaline washing tower.

[0013] In other feasible embodiments, the alkaline washing device further includes a controller and a pH detector. The pH detector is located on the inner wall of the alkaline washing tower and below the liquid level. The controller is electrically connected to the pH detector, the alkaline solution supply pump, the circulation pump, and the water supply pump.

[0014] In other feasible embodiments, the water washing device includes a water washing tower, a water circulation component, a water replenishment component, and a water spraying component. The water washing tower is arranged vertically, a portion of the water spraying component is embedded inside the water washing tower, the inlet end of the water circulation component is connected to the portion of the water washing tower below the liquid level, the outlet end of the water circulation component is connected to the water spraying component, and the water replenishment component is connected to the water washing tower for replenishing neutral water into the water washing tower.

[0015] The beneficial effects of this utility model are as follows: This utility model includes a blower, an alkaline washing device, and a water washing device. The outlet of the blower is connected to the alkaline washing device, which includes an alkaline washing tower, a spray assembly, an alkaline solution supply assembly, and a circulation assembly. One side of the alkaline washing tower is connected to the blower. A portion of the spray assembly is embedded inside the alkaline washing tower and connected to the alkaline solution supply assembly. The inlet of the circulation assembly is connected to the portion of the alkaline washing tower below the liquid level. The outlet of the circulation assembly is connected to the spray assembly. The outlet of the alkaline washing tower is connected to the water washing device, which is used to wash the gas. The extraction tail gas treatment system provided by this utility model completely neutralizes the acidic substances in the extraction tail gas through circulating alkaline washing before guiding it to the water washing device. The extraction tail gas is then washed with water to ensure it meets emission standards before being discharged, effectively avoiding environmental pollution. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the extraction tail gas treatment system in this utility model; Figure 2 for Figure 1 Schematic diagram of the cross-section of the alkali washing tower; Figure 3 for Figure 1 Schematic diagram of the cross-section of the greywater washing tower; Among them: 1- Blower, 2-Alkali washing device, 21-Alkali washing tower, 211-Air inlet, 212-Air outlet, 213-Insertion port, 214-Drain outlet, 215-Liquid replenishment port, 22-Spray assembly, 221-Spray pipe, 222-Spray head, 23-Alkali supply assembly, 24-Circulation assembly, 241-Circulation pump, 25-Water supply tank; 3-Water washing device, 31-Water washing tower, 32-Water circulation component, 321-Water circulation pump, 33-Water replenishment component, 331-Water replenishment tank, 34-Water spray component. Detailed Implementation

[0018] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0019] like Figure 1-3 As shown, an embodiment of this utility model provides an extraction tail gas treatment system, which includes: a blower 1, an alkaline washing device 2, and a water washing device 3. The air outlet of the blower 1 is connected to the alkaline washing device 2. The alkaline washing device 2 includes an alkaline washing tower 21, a spray assembly 22, an alkaline solution supply assembly 23, and a circulation assembly 24. One side of the alkaline washing tower 21 is connected to the blower 1. A portion of the spray assembly 22 is embedded inside the alkaline washing tower 21 and is connected to the alkaline solution supply assembly 23. The liquid inlet of the circulation assembly 24 is connected to the portion of the alkaline washing tower 21 below the liquid level. The liquid outlet of the circulation assembly 24 is connected to the spray assembly 22. The gas outlet of the alkaline washing tower 21 is connected to the water washing device 3. The water washing device 3 is used to wash the gas with water.

[0020] In use, the gas produced by extraction is introduced into the alkaline washing device 2 through the blower 1. The alkaline washing device 2, through the cooperation of the spray assembly 22, the alkaline solution supply assembly 23 and the circulation assembly 24, performs alkaline washing on the gas to completely neutralize the acidic substances in the gas before guiding it to the water washing device 3. Then the gas is washed with water to make the gas meet the emission standards before being discharged.

[0021] Specifically, in this embodiment, multiple alkaline washing devices 2 are provided, and these multiple alkaline washing devices 2 are connected in parallel. The purpose of this arrangement is that, if the alkaline washing devices 2 need to be inspected, in order to ensure that the extraction tail gas treatment system can operate without interruption, multiple alkaline washing devices 2 are arranged to work alternately to maintain the continuous operation of the extraction tail gas treatment system.

[0022] Specifically, the alkaline washing tower 21 is arranged vertically, and an air inlet 211 communicating with the blower 1 is opened on the side wall of the alkaline washing tower 21 near the bottom. An air outlet 212 communicating with the water washing device 3 is opened on the top of the alkaline washing tower 21, and an insertion port 213 for the spray assembly 22 to be inserted is opened on the side wall of the alkaline washing tower 21 near the top.

[0023] Specifically, the spray assembly 22 includes a spray pipe 221 and several spray heads 222. One end of the spray pipe 221 extends into the mounting port 213. The spray heads 222 are located on the portion of the spray pipe 221 that extends into the alkaline washing tower 21 and communicate with the interior of the spray pipe 221. The portion of the spray pipe 221 located outside the alkaline washing tower 21 has a first inlet and a second inlet, respectively communicating with the alkali supply assembly 23 and the circulation assembly 24. The purpose of this design is that the alkali supply assembly 23 and the circulation assembly 24 can share the spray heads 222, achieving the dual functions of replenishing alkali to the alkaline washing tower 21 and circulating spraying.

[0024] Specifically, the alkali supply component 23 includes an alkali storage tank and an alkali supply pump. The alkali supply pump is connected to the alkali storage tank and the first inlet, respectively, and can controllably supply alkali to the spray component 22.

[0025] Specifically, the circulation component 24 includes a circulation pump 241, the inlet of which is connected to the portion of the alkaline washing tower 21 below the liquid level, and the outlet of which is connected to the second inlet, so that the liquid in the alkaline washing tower 21 can be controllably drawn and sent to the spray component 22.

[0026] In this embodiment, the circulation component 24 includes multiple circulation pumps 241 connected in parallel. This arrangement is intended to ensure the continuous operation of the extraction tail gas treatment system by having multiple circulation pumps 241 work alternately during maintenance, thus maintaining the continuous operation of the system.

[0027] In addition, a drain port 214 and a replenishment port 215 are provided on the side wall of the alkaline washing tower 21 near the bottom. The alkaline washing device 2 also includes a water supply tank 25 storing neutral water and a water supply pump. The water supply tank 25 is connected to the replenishment port 215 and is used to replenish neutral water into the alkaline washing tower 21. The water supply tank 25 is connected to the replenishment port 215 through the water supply pump.

[0028] Specifically, the alkaline washing device 2 also includes a controller and a pH detector. The pH detector is located on the inner wall of the alkaline washing tower 21 and below the liquid level. The controller is electrically connected to the pH detector, the alkaline solution supply pump, the circulation pump 241, and the water supply pump. In use, a pH value can be preset on the controller. The controller drives the alkaline solution supply pump, the circulation pump 241, or the water supply pump to operate based on the pH value detected by the pH detector and the preset pH value, so that the pH value detected by the pH detector is adjusted towards the preset pH value.

[0029] Specifically, the water washing device 3 includes a water washing tower 31, a water circulation component 32, a water replenishment component 33, and a water spray component 34. The water washing tower 31 is arranged vertically, and a portion of the water spray component 34 is embedded inside the water washing tower 31. The liquid inlet of the water circulation component 32 is connected to the portion of the water washing tower 31 below the liquid level, and the liquid outlet of the water circulation component 32 is connected to the water spray component 34. The water replenishment component 33 is connected to the water washing tower 31 and is used to replenish neutral water into the water washing tower 31.

[0030] Furthermore, the side wall of the water washing tower 31 near the bottom is provided with a water washing air inlet that communicates with the alkaline washing device 2, and the top of the water washing tower 31 is provided with a water washing air outlet.

[0031] Furthermore, the water circulation component 32 includes a water circulation pump 321. The inlet end of the water circulation pump 321 is connected to the portion of the water washing tower 31 below the liquid level, and the outlet end of the water circulation pump 321 is connected to the water spray component 34. The water circulation pump 321 can controllably draw liquid from the bottom of the water washing tower 31 and send it to the water spray component 34 for spraying.

[0032] Furthermore, the water circulation component 32 includes multiple water circulation pumps 321 connected in parallel. This arrangement is intended to ensure the continuous operation of the extraction tail gas treatment system by having multiple water circulation pumps 321 work alternately during maintenance, thus allowing the system to operate without interruption.

[0033] Furthermore, the water replenishment component 33 includes a water replenishment tank 331 and a water replenishment pump. The two ends of the water replenishment pump are respectively connected to the water replenishment tank 331 and the water washing tower 31, and are used to replenish neutral water into the water washing tower 31.

[0034] Furthermore, the water spray assembly 34 includes a water spray pipe and several water spray heads. One end of the water spray pipe extends into the water washing tower 31. The water spray heads are located on the portion of the water spray pipe that extends into the water washing tower 31 and communicate with the interior of the water spray pipe. The portion of the water spray pipe located outside the alkaline water washing tower 31 communicates with the water circulation assembly 32.

[0035] The beneficial effects of this utility model are: This utility model includes a blower, an alkaline washing device, and a water washing device. The outlet of the blower is connected to the alkaline washing device. The alkaline washing device includes an alkaline washing tower, a spray assembly, an alkaline solution supply assembly, and a circulation assembly. One side of the alkaline washing tower is connected to the blower. A portion of the spray assembly is embedded inside the alkaline washing tower and connected to the alkaline solution supply assembly. The inlet of the circulation assembly is connected to the portion of the alkaline washing tower below the liquid level. The outlet of the circulation assembly is connected to the spray assembly. The outlet of the alkaline washing tower is connected to the water washing device, which is used to wash the gas. In use, the gas generated during extraction is introduced into the alkaline washing device through the blower. The alkaline washing device, through the cooperation of the spray assembly, the alkaline solution supply assembly, and the circulation assembly, performs cyclical alkaline washing on the gas, completely neutralizing the acidic substances in the gas before guiding it to the water washing device. The gas is then washed with water to ensure it meets emission standards before being discharged.

[0036] In the description of this application, it should be noted that the terms "upper" and "lower," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the module or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0037] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model.

Claims

1. An extraction tail gas treatment system, characterized in that, include: blower, An alkaline washing device includes an alkaline washing tower, a spray assembly, an alkaline solution supply assembly, and a circulation assembly. One side of the alkaline washing tower is connected to the blower. A portion of the spray assembly is embedded inside the alkaline washing tower and is connected to the alkaline solution supply assembly. The inlet end of the circulation assembly is connected to the portion of the alkaline washing tower below the liquid level, and the outlet end of the circulation assembly is connected to the spray assembly. The gas outlet of the alkali washing tower is connected to the water washing device, which is used to wash the gas.

2. The extraction tail gas treatment system as described in claim 1, characterized in that, The facility is equipped with multiple alkaline washing devices, which are connected in parallel.

3. The extraction tail gas treatment system as described in claim 1, characterized in that, The alkaline washing tower is arranged vertically. An air inlet communicating with the blower is opened on the side wall of the alkaline washing tower near the bottom. An air outlet communicating with the water washing device is opened on the top of the alkaline washing tower. An insertion port for the spray assembly is opened on the side wall of the alkaline washing tower near the top.

4. The extraction tail gas treatment system as described in claim 3, characterized in that, The spray assembly includes a spray pipe and several spray heads. One end of the spray pipe extends into the embedded port. The spray heads are located on the part of the spray pipe that extends into the alkaline washing tower and communicate with the inside of the spray pipe. The part of the spray pipe located outside the alkaline washing tower is provided with a first inlet and a second inlet that are respectively connected to the alkaline solution supply assembly and the circulation assembly.

5. The extraction tail gas treatment system as described in claim 4, characterized in that, The alkali supply assembly includes an alkali storage tank and an alkali supply pump. The alkali supply pump is connected to the alkali storage tank and the first inlet, respectively, and can controllably supply alkali to the spray assembly.

6. The extraction tail gas treatment system as described in claim 5, characterized in that, The circulation assembly includes a circulation pump, the inlet of which is connected to the portion of the alkaline washing tower below the liquid level, and the outlet of which is connected to the second inlet, so that the liquid in the alkaline washing tower can be controllably drawn and sent to the spray assembly.

7. The extraction tail gas treatment system as described in claim 6, characterized in that, The circulation assembly includes a plurality of circulation pumps connected in parallel.

8. The extraction tail gas treatment system as described in claim 6, characterized in that, The alkaline washing tower is provided with a drain outlet and a liquid replenishment outlet on its side wall near the bottom. The alkaline washing device also includes a water supply tank storing neutral water and a water supply pump. The water supply tank is connected to the liquid replenishment outlet and is used to replenish neutral water into the alkaline washing tower.

9. The extraction tail gas treatment system as described in claim 8, characterized in that, The alkaline washing device also includes a controller and a pH detector. The pH detector is located on the inner wall of the alkaline washing tower and below the liquid level. The controller is electrically connected to the pH detector, the alkaline solution supply pump, the circulation pump, and the water supply pump.

10. The extraction tail gas treatment system as described in claim 1, characterized in that, The water washing device includes a water washing tower, a water circulation component, a water replenishment component, and a water spraying component. The water washing tower is arranged vertically. A portion of the water spraying component is embedded inside the water washing tower. The liquid inlet of the water circulation component is connected to the portion of the water washing tower below the liquid level. The liquid outlet of the water circulation component is connected to the water spraying component. The water replenishment component is connected to the water washing tower and is used to replenish neutral water into the water washing tower.

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