Flue gas desulfurization device for aluminum electrolysis cell
By designing a flue gas desulfurization device of aluminum electrolytic tank with primary and secondary desulfurization chambers, the continuous replacement and recycling of alkali liquid is achieved by combining the drain channel and the liquid conduit, and the device cannot be sustained in the prior art Work problems ensure the effective absorption and treatment of sulfur elements in the flue gas and avoid production interruptions.
Patent Information
- Application Number
- CN202323627446.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2033-12-29
AI Technical Summary
The existing aluminum electrolytic tank flue gas desulfurization device cannot continue to work when replacing the alkaline solution, resulting in the problem of production interruption.
A flue gas desulfurization device of an aluminum electrolytic cell including primary and secondary desulfurization chambers is designed. Through the cooperation of the drainage channel and the liquid conduit, the continuous replacement and recycling of alkali liquid is realized, ensuring that the flue gas always comes into contact with the alkali liquid. , thereby avoiding production interruptions.
It realizes the continuous operation of the device during the replacement of the alkali liquid, avoids production interruptions, and ensures the effective absorption and treatment of sulfur elements in the flue gas.
Smart Images
Figure CN222151497U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fume treatment of electrolytic aluminum, in particular to a fume desulfurization device for an aluminum electrolytic cell. Background Art
[0002] Aluminum electrolysis cells produce a lot of flue gas during the process of electrolytic aluminum production. The flue gas contains sulfur, which must be desulfurized before it can be discharged to avoid polluting the atmosphere. Usually, aluminum electrolysis plants use wet desulfurization, that is, using the acidic characteristics of sulfur aqueous solution, the flue gas is passed into alkaline liquid to absorb sulfur.
[0003] However, the desulfurization device in the prior art needs to replace the alkaline solution in the device after working for a certain period of time. During the replacement process, the desulfurization device cannot work, thus delaying production. Utility Model Content
[0004] Aiming at the technical problem of delaying production when replacing alkaline solution in a desulfurization device, the utility model provides a flue gas desulfurization device for an aluminum electrolytic cell, which has the advantage that the desulfurization device can continue to work during the replacement of the alkaline solution.
[0005] The technical solution of the utility model is:
[0006] A flue gas desulfurization device for an aluminum electrolysis cell, comprising:
[0007] A box body, wherein a primary desulfurization chamber and a secondary desulfurization chamber are arranged side by side inside, the bottom of the primary desulfurization chamber is provided with a liquid discharge channel, and the top of the secondary desulfurization chamber is provided with a smoke discharge channel;
[0008] A smoke delivery pipe, one end of which penetrates into the box body and is arranged at the bottom of the primary desulfurization chamber;
[0009] A smoke collecting pipe, one end of which is arranged at the top of the primary desulfurization chamber, and the other end of which is arranged at the bottom of the secondary desulfurization chamber;
[0010] A liquid delivery pipe, one end of which is arranged at the top of the secondary desulfurization chamber;
[0011] A liquid guide pipe, one end of which is arranged at the bottom of the secondary desulfurization chamber, and the other end of which is arranged in the primary desulfurization chamber;
[0012] The pump body is arranged on the liquid guiding tube.
[0013] Optionally, a partition is vertically provided in the box body, and the first-level desulfurization chamber and the second-level desulfurization chamber are located on both sides of the partition respectively.
[0014] Optionally, one end of the smoke delivery pipe is laid in an S shape at the bottom of the primary desulfurization chamber;
[0015] One end of the smoke collecting pipe is laid in an S shape at the bottom of the secondary desulfurization chamber.
[0016] Optionally, the smoke delivery pipe has a plurality of exhaust holes on one end located at the bottom of the primary desulfurization chamber, and the smoke collecting pipe also has a plurality of exhaust holes on one end located at the bottom of the secondary desulfurization chamber.
[0017] Optionally, the volume of the primary desulfurization chamber is equal to the volume of the secondary desulfurization chamber, and the volume of liquid in the primary desulfurization chamber is less than or equal to four fifths of the volume thereof;
[0018] The difference between the liquid volume in the primary desulfurization chamber and the liquid volume in the secondary desulfurization chamber is 10%-15% of the volume of the primary desulfurization chamber.
[0019] Optionally, both the smoke collecting pipe and the liquid guiding pipe pass through the partition, and the positions where the two pass through the partition are located within one tenth of the partition close to the top of the box body.
[0020] Optionally, one end of the smoke collecting pipe located in the primary desulfurization chamber is above the liquid level, and a booster pump is provided on the smoke collecting pipe.
[0021] Optionally, one end of the liquid guide pipe disposed in the primary desulfurization chamber is located below the liquid surface.
[0022] Optionally, one end of the smoke delivery pipe away from the primary desulfurization chamber is located above the box body.
[0023] Compared with the prior art, the beneficial effects of the utility model are:
[0024] When replacing the alkali solution in the primary desulfurization chamber, the alkali solution in the primary desulfurization chamber is directly drained through the drainage channel, and then the drainage channel is blocked. At this time, the flue gas directly enters the primary desulfurization chamber from the smoke delivery pipe and passes through the primary desulfurization chamber, and then enters the secondary desulfurization chamber through the smoke collecting pipe to react with the alkali solution in the secondary desulfurization chamber.
[0025] Then the alkali liquid in the secondary desulfurization chamber is pumped into the primary desulfurization chamber through the liquid guide pipe. During this process, the flue gas reacts with the alkali liquid in both the primary and secondary desulfurization chambers. When the alkali liquid in the secondary desulfurization chamber is pumped out, the flue gas reacts with the alkali liquid only in the primary desulfurization chamber. Finally, new alkali liquid is injected into the secondary desulfurization chamber through the liquid delivery pipe.
[0026] In the process of alkaline solution being pumped from the secondary desulfurization chamber into the primary desulfurization chamber, the alkaline ion concentration in the alkaline solution is relatively high, which can completely absorb the sulfur element in the flue gas. When the alkaline solution in the secondary desulfurization chamber is completely pumped into the primary desulfurization chamber and new alkaline solution is injected into the secondary desulfurization chamber, the alkaline ion concentration in the primary desulfurization chamber is again made relatively lower than the alkaline ion concentration in the secondary desulfurization chamber.
[0027] During the whole process, the flue gas is always in the state of being fed into the box and is always in contact with the alkali solution. Therefore, in this embodiment, the alkali solution can be replaced while the flue gas is continuously fed into the device, thereby avoiding the problem of delaying production. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0029] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;
[0030] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 2 . DETAILED DESCRIPTION
[0031] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.
[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present invention are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art, and are only for the convenience of describing the present invention 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 should not be understood as a limitation on the present invention.
[0033] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.
[0034] Example:
[0035] See also Figure 1 and Figure 2A flue gas desulfurization device for an aluminum electrolytic cell includes a housing 1, a partition 2, a smoke delivery pipe 3, a smoke collecting pipe 4, a liquid delivery pipe 5, a liquid guide pipe 6 and a pump body. Specifically, the partition 2 is arranged in the housing 1, and divides the interior of the housing 1 into two parts, namely, a primary desulfurization chamber 7 and a secondary desulfurization chamber 8, and the primary desulfurization chamber 7 and the secondary desulfurization chamber 8 are arranged in parallel. A drainage channel 9 is arranged at the bottom of the primary desulfurization chamber 7, and a valve is arranged on the drainage channel 9. A smoke exhaust channel 10 is arranged at the top of the secondary desulfurization chamber 8.
[0036] One end of the smoke delivery pipe 3 penetrates into the interior of the housing 1 from the side of the housing 1, and this end of the smoke delivery pipe 3 is arranged at the bottom of the primary desulfurization chamber 7, and the end of the smoke delivery pipe 3 away from the primary desulfurization chamber 7 is located above the housing 1 (to avoid the backflow of liquid in the primary desulfurization chamber 7). One end of the smoke collection pipe 4 is arranged at the top of the primary desulfurization chamber 7, and the other end of the smoke collection pipe 4 is arranged at the bottom of the secondary desulfurization chamber 8, and the primary desulfurization chamber 7 is connected with the secondary desulfurization chamber 8 through the smoke collection pipe 4.
[0037] One end of the liquid delivery pipe 5 penetrates into the box body 1 from the other side of the box body 1, and this end of the liquid delivery pipe 5 is arranged at the top of the secondary desulfurization chamber 8, one end of the liquid guiding pipe 6 is arranged at the bottom of the secondary desulfurization chamber 8, and the other end of the liquid guiding pipe 6 is arranged in the primary desulfurization chamber 7, and a pump body is arranged on the liquid guiding pipe 6, through which the liquid in the secondary desulfurization chamber 8 can be pumped into the primary desulfurization chamber 7.
[0038] The smoke collecting pipe 4 and the liquid guiding pipe 6 both pass through the partition plate 2 from the top thereof.
[0039] The working principle of this embodiment is to first charge alkali solution into the primary desulfurization chamber 7 and the secondary desulfurization chamber 8 respectively, and then send the flue gas into the primary desulfurization chamber 7 through the smoke sending pipe 3. After the flue gas is processed in the primary desulfurization chamber 7, it is sent into the secondary desulfurization chamber 8 through the smoke collecting pipe 4, and after being processed in the secondary desulfurization chamber 8, it is discharged from the smoke exhaust channel 10 at the top of the secondary desulfurization chamber 8.
[0040] Since the flue gas first enters the primary desulfurization chamber 7 , the alkaline ion consumption rate in the primary desulfurization chamber 7 is faster than that in the secondary desulfurization chamber 8 . Therefore, the alkaline solution in the primary desulfurization chamber 7 needs to be replaced earlier than that in the secondary desulfurization chamber 8 .
[0041] When replacing the alkaline solution in the primary desulfurization chamber 7, the alkaline solution in the primary desulfurization chamber 7 is directly drained through the drainage channel 9, and then the drainage channel 9 is blocked. At this time, the flue gas directly enters the primary desulfurization chamber 7 from the smoke delivery pipe 3 and passes through the primary desulfurization chamber 7, and then enters the secondary desulfurization chamber 8 through the smoke collecting pipe 4 to react with the alkaline solution in the secondary desulfurization chamber 8.
[0042] Then the alkali liquid in the secondary desulfurization chamber 8 is pumped into the primary desulfurization chamber 7 through the liquid conduit 6. During this process, the flue gas reacts with the alkali liquid in both the primary desulfurization chamber 7 and the secondary desulfurization chamber 8. When the alkali liquid in the secondary desulfurization chamber 8 is pumped out, the flue gas reacts with the alkali liquid only in the primary desulfurization chamber 7. Finally, new alkali liquid is injected into the secondary desulfurization chamber 8 through the liquid delivery pipe 5.
[0043] In the process of pumping alkaline solution from the secondary desulfurization chamber 8 into the primary desulfurization chamber 7, the alkaline ion concentration in the alkaline solution is relatively high, which can completely absorb the sulfur element in the flue gas. When the alkaline solution in the secondary desulfurization chamber 8 is completely pumped into the primary desulfurization chamber 7 and new alkaline solution is injected into the secondary desulfurization chamber 8, the alkaline ion concentration in the primary desulfurization chamber 7 is again made relatively lower than the alkaline ion concentration in the secondary desulfurization chamber 8.
[0044] During the whole process, the flue gas is always in the state of being fed into the box 1 and is always in contact with the alkali solution. Therefore, in this embodiment, the alkali solution can be replaced while the flue gas is continuously fed into the device, thereby avoiding the problem of delaying production.
[0045] In one specific embodiment:
[0046] One end of the smoke delivery pipe 3 is laid in an S shape at the bottom of the primary desulfurization chamber 7 , and the smoke delivery pipe 3 is provided with a plurality of exhaust holes at one end located at the bottom of the primary desulfurization chamber 7 .
[0047] In this embodiment, by increasing the length of the smoke delivery pipe 3 at the bottom of the primary desulfurization chamber 7 and providing exhaust holes on the smoke delivery pipe 3 , the smoke can be evenly arranged in the primary desulfurization chamber 7 .
[0048] Similarly, one end of the smoke collecting pipe 4 is also laid in an S shape at the bottom of the secondary desulfurization chamber 8, and the end of the smoke collecting pipe 4 located at the bottom of the secondary desulfurization chamber 8 also has a plurality of exhaust holes, so that the smoke is evenly arranged in the secondary desulfurization chamber 8.
[0049] In another specific embodiment:
[0050] The volume of the primary desulfurization chamber 7 is equal to that of the secondary desulfurization chamber 8. The volume of the alkali liquid in the primary desulfurization chamber 7 is less than or equal to four fifths of the volume of the primary desulfurization chamber 7. The difference between the volume of the alkali liquid in the primary desulfurization chamber 7 and the volume of the alkali liquid in the secondary desulfurization chamber 8 is 10%-15% of the volume of the primary desulfurization chamber 7.
[0051] The position where the smoke collecting pipe 4 and the liquid guiding pipe 6 pass through the partition 2 is located within one tenth of the partition 2 near the top of the box body 1, and one end of the liquid guiding pipe 6 arranged in the primary desulfurization chamber 7 is located below the liquid surface of the alkali solution.
[0052] In this embodiment, by limiting the liquid volume in the primary desulfurization chamber 7 and the secondary desulfurization chamber 8, the end of the smoke collecting pipe 4 can be prevented from being submerged in the liquid. In addition, the position where the liquid guide pipe 6 passes through the partition 2 is set above the liquid level of the alkali solution, which can ensure that the pump body is above the liquid level to avoid corrosion by the alkali solution.
[0053] In another specific embodiment:
[0054] A booster pump is provided on the smoke collecting pipe 4, and the booster pump is located in the primary desulfurization chamber 7 and above the alkali liquid level. By providing the booster pump, the flue gas in the primary desulfurization chamber 7 can be driven into the secondary desulfurization chamber 8 to resist the pressure of the alkali liquid in the secondary desulfurization chamber 8.
[0055] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.
Claims
1. A flue gas desulfurization device for an aluminum electrolysis cell, characterized in that: include: A box body, wherein a primary desulfurization chamber and a secondary desulfurization chamber are arranged side by side inside, the bottom of the primary desulfurization chamber is provided with a liquid discharge channel, and the top of the secondary desulfurization chamber is provided with a smoke discharge channel; A smoke delivery pipe, one end of which penetrates into the box body and is arranged at the bottom of the primary desulfurization chamber; A smoke collecting pipe, one end of which is arranged at the top of the primary desulfurization chamber, and the other end of which is arranged at the bottom of the secondary desulfurization chamber; A liquid delivery pipe, one end of which is arranged at the top of the secondary desulfurization chamber; A liquid guide pipe, one end of which is arranged at the bottom of the secondary desulfurization chamber, and the other end of which is arranged in the primary desulfurization chamber; The pump body is arranged on the liquid guiding tube.
2. The flue gas desulfurization device for aluminum electrolysis cell according to claim 1, characterized in that: A partition is vertically arranged in the box body, and two sides of the partition are respectively the primary desulfurization chamber and the secondary desulfurization chamber.
3. The flue gas desulfurization device for aluminum electrolysis cell according to claim 2, characterized in that: One end of the smoke delivery pipe is laid in an S shape at the bottom of the primary desulfurization chamber; One end of the smoke collecting pipe is laid in an S shape at the bottom of the secondary desulfurization chamber.
4. The flue gas desulfurization device for aluminum electrolysis cell according to claim 3, characterized in that: The smoke delivery pipe has a plurality of exhaust holes on one end located at the bottom of the primary desulfurization chamber, and the smoke collection pipe also has a plurality of exhaust holes on one end located at the bottom of the secondary desulfurization chamber.
5. The flue gas desulfurization device for aluminum electrolysis cell according to claim 4, characterized in that: The volume of the primary desulfurization chamber is equal to that of the secondary desulfurization chamber, and the volume of liquid in the primary desulfurization chamber is less than or equal to four fifths of the volume thereof; The difference between the liquid volume in the primary desulfurization chamber and the liquid volume in the secondary desulfurization chamber is 10%-15% of the volume of the primary desulfurization chamber.
6. The flue gas desulfurization device for aluminum electrolysis cell according to claim 5, characterized in that: The smoke collecting pipe and the liquid guiding pipe both pass through the partition, and the positions where the two pass through the partition are located within one tenth of the partition close to the top of the box body.
7. The flue gas desulfurization device for aluminum electrolysis cell according to claim 6, characterized in that: One end of the smoke collecting pipe located in the primary desulfurization chamber is above the liquid level, and a booster pump is provided on the smoke collecting pipe.
8. The flue gas desulfurization device for aluminum electrolysis cell according to claim 7, characterized in that: One end of the liquid guide pipe disposed in the primary desulfurization chamber is located below the liquid surface.
9. The flue gas desulfurization device for aluminum electrolysis cell according to claim 8, characterized in that: One end of the smoke delivery pipe away from the primary desulfurization chamber is located above the box body.