Acid gas absorbing and drying device
By setting up an absorption box device for lime slurry and quicklime, the problem of acid gas treatment in chemical products was solved, achieving the removal of acid gas and drying of exhaust gas, thus protecting human health and the environment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2026-03-31
AI Technical Summary
Acidic gases such as hydrogen sulfide and hydrogen chloride generated during the production of chemical products are not effectively treated, which endangers human health and pollutes the environment.
The apparatus includes a first absorption box and a second absorption box. The first absorption box contains lime slurry for initial absorption, and the second absorption box contains quicklime for further absorption and drying. A stirring rod and a rotating shaft are used to improve the reaction efficiency, and the quicklime is stored in a non-woven bag for easy replacement.
It effectively removes acidic gases generated during the production of chemical products, avoiding harm to human health and the environment, and achieving the drying effect of exhaust gas.
Smart Images
Figure CN224057053U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to chemical product processing technical field especially, relates to a kind of acidic gas absorption drying device. BACKGROUND
[0002] Acidic gas refers to the gas that generates salt with alkali, such as hydrogen sulfide, hydrogen chloride, carbon dioxide and the like.
[0003] In chemical product production, hydrogen sulfide, hydrogen chloride and the like acidic gas are often formed, such as in the preparation of isavuconazole intermediate M1 (CAS number 60468-36-2, 2-chloro-2', 5'-difluorophenone), the raw material used is 1, 4-difluorobenzene (CAS: 540-36-3) and chloroacetyl chloride, which can be obtained by reacting in the presence of aluminum chloride. While preparing isavuconazole intermediate M1, hydrogen chloride gas, an acidic gas, is also produced. If these acidic gases are not properly treated, they will seriously harm human health and pollute the environment.
[0004] Therefore, there is an urgent need to provide a device that can treat acidic gases such as hydrogen sulfide and hydrogen chloride, which can harm human health and pollute the environment. SUMMARY
[0005] The utility model aims to provide an acidic gas absorption drying device that can effectively absorb acidic gases such as hydrogen sulfide and hydrogen chloride, and also dry the tail gas.
[0006] The utility model aims to achieve the following technical solutions:
[0007] An acidic gas absorption drying device includes a first absorption tank and a second absorption tank. The gas outlet of the first absorption tank is connected to the gas inlet of the second absorption tank via a connecting pipe. The top of the first absorption tank is provided with a gas inlet pipe, and the first absorption tank contains lime milk. The second absorption tank contains quicklime, and the second absorption tank is provided with a gas outlet pipe.
[0008] Preferably, the gas outlet of the gas inlet pipe is provided with an inverted funnel, and the inverted funnel is arranged in a gap between the lime milk surface.
[0009] Preferably, the first absorption tank is provided with a rotating shaft, the outer wall of the rotating shaft is provided with a plurality of stirring rods, and the top of the first absorption tank is provided with a motor fixedly connected to the top of the rotating shaft.
[0010] Preferably, the interior of the second absorption tank is provided with at least two absorption boxes which are arranged in up-down distribution and open at the top ends, the absorption boxes are arranged staggeredly, each of the absorption boxes is connected with three sides of the inner wall of the second absorption tank, and the remaining one side is arranged in a gap with the inner wall of the absorption box; a gap for facilitating gas penetration is left between adjacent absorption boxes; the bottom wall of the absorption box is provided with air holes; the quicklime is contained in the absorption box; and the gas outlet end of the connecting pipe penetrates through the side wall of the second absorption tank and is arranged below the absorption box, and the gas outlet pipe is arranged above the absorption box.
[0011] Preferably, the top end of the second absorption tank is provided with a top cover, and each of the absorption boxes is in sliding connection with the inner wall of the second absorption tank.
[0012] Preferably, the inner wall of the second absorption tank is provided with a plurality of vertical sliding grooves, and the outer wall of the absorption box is provided with a sliding block in sliding cooperation with the vertical sliding grooves.
[0013] Preferably, at least one side of the two sides of the adjacent absorption boxes which are close to each other is provided with a plurality of protrusions.
[0014] Preferably, a non-woven fabric bag is arranged in the absorption box, the quicklime is arranged in the non-woven fabric bag, and the non-woven fabric bag can be taken out of the absorption box.
[0015] Compared with the prior art, the utility model has the beneficial effects as follows:
[0016] By arranging the first absorption tank and the lime milk in the first absorption tank, the acidic gas (such as hydrogen chloride, hydrogen sulfide, etc.) generated in the production process of chemical products (such as the hydrogen chloride gas generated in the production process of intermediate M1 of isacoxazole) can be removed; by arranging the second absorption tank and the quicklime in the second absorption tank, the acidic gas which is not completely adsorbed in the first absorption tank can be further absorbed, and at the same time, the moisture brought from the lime milk can be removed, thereby achieving the purpose of drying the gas.
[0017] Through the synergistic effect of the above-mentioned devices, the acidic gas generated in the production process of chemical products can be effectively removed and the tail gas can be dried, thereby effectively avoiding the harm of the acidic gas to human health and the pollution to the environment. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is a sectional structure schematic view of the front direction of example 1;
[0019] Figure 2 It is a sectional structure schematic view of the front direction of the second absorption tank in example 2;
[0020] Figure 3 It isFigure 2 A top-down view of the absorption box at the top;
[0021] Figure 4 for Figure 2 A top-view structural diagram of the bottommost absorption box;
[0022] In the diagram: 1-First absorption box, 2-Second absorption box, 3-Connecting pipe, 4-Inlet pipe, 5-Outlet pipe, 6-Inverted funnel, 7-Rotating shaft, 8-Stirring rod, 9-Motor, 10-Absorption box, 11-Top cover, 12-Vertical slide, 13-Slider, 14-Protrusion, 15-Air hole. Detailed Implementation
[0023] Example 1
[0024] An acidic gas absorption and drying device, such as Figure 1 As shown, it includes a first absorption box 1 and a second absorption box 2. The air outlet of the first absorption box 1 and the air inlet of the second absorption box 2 are connected by a connecting pipe 3 (an air pump can be installed on the connecting pipe 3 to adjust the gas output speed according to actual conditions, and can also be opened or closed according to actual needs). An air inlet pipe 4 is provided at the top of the first absorption box 1, and the first absorption box 1 contains lime slurry. The second absorption box 2 contains quicklime, and the second absorption box 2 is provided with an air outlet pipe 5. Further, such as Figure 1 As shown, to increase the contact area between the gas and the lime slurry, an inverted funnel 6 is provided at the outlet end of the inlet pipe 4. The inverted funnel 6 and the lime slurry surface are spaced apart to prevent backflow. Furthermore, because acidic gases react primarily with the surface lime slurry after entering, the internal lime slurry cannot effectively absorb the gas, leading to reduced exhaust gas absorption efficiency. Therefore, as... Figure 1 As shown, a rotating shaft 7 is provided inside the first absorption box 1, and a plurality of stirring rods 8 are provided on the outer wall of the rotating shaft 7. A motor 9 is provided at the top of the first absorption box 1 and is fixedly connected to the top of the rotating shaft 7.
[0025] It is worth noting that this invention is applicable to the treatment of acidic gases that can react with alkalis, especially hydrogen chloride and hydrogen sulfide gases. The following detailed description of the specific implementation process of this invention uses the treatment of hydrogen chloride gas generated during the preparation of isaconazole intermediate M1 as an example.
[0026] In the implementation, the raw material for preparing the intermediate M1 of isavuconazole is 1,4-difluorobenzene (CAS: 540-36-3) and chloroacetyl chloride, and hydrogen chloride gas is generated in the reaction in the presence of aluminum chloride, so in the preparation, the feeding end of the feeding pipe is connected with the reaction kettle, so that the hydrogen chloride gas generated in the preparation process enters the first absorption tank 1 along the gas inlet pipe 4, at this time, the motor 9 is started, and under the action of the motor 9, the rotating shaft 7 drives the stirring rod 8 to rotate synchronously, so that the lime milk in the first absorption tank 1 rotates, so that the hydrogen chloride gas entering the first absorption tank 1 is absorbed to the maximum extent; after being treated in the first absorption tank 1, the tail gas enters the second absorption tank 2 along the connecting pipe 3, and is absorbed by the quicklime in the second absorption tank 2, specifically, the quicklime can further absorb the acid gas that is not completely absorbed in the first absorption tank 1, and can also remove the water brought from the lime milk, thereby achieving the purpose of drying the tail gas.
[0027] Through the synergistic effect of the above-mentioned devices, the acid gas generated in the production process of chemical products can be effectively removed and the tail gas can be effectively dried, thereby effectively avoiding the harm of acid gas to human health and the pollution to the environment.
[0028] Example 2
[0029] Based on example 1, as shown in Figure 2 , the second absorption tank 2 is internally provided with at least two absorption boxes 10 distributed in an upper and lower manner and provided with an open top end, the absorption boxes 10 are staggered, each of the absorption boxes 10 is connected with the inner wall of the second absorption tank 2 at three sides, and the remaining one side is gap-connected with the inner wall of the absorption box 10, as shown in Figures 2-4 , for example, the left front and rear three sides of the lowermost absorption box 10 are connected with the inner wall of the second absorption tank 2, and the right front and rear three sides of the second absorption box 10 from bottom to top are connected with the inner wall of the second absorption tank 2; a gap for gas penetration is left between adjacent absorption boxes 10; as shown in Figures 2-4 , a plurality of air holes 15 are arranged on the bottom wall of each absorption box 10; the quicklime (prior art, not shown in the figure) is contained in the absorption box 10; the gas outlet end of the connecting pipe 3 penetrates the side wall of the second absorption tank 2 and is arranged below the absorption box 10, and the gas outlet pipe 5 is arranged above the absorption box 10. Further, as shown in Figure 1 , the top end of the second absorption tank 2 is provided with a top cover 11, and each absorption box 10 is slidingly connected with the inner wall of the second absorption tank 2. Further, as shown in Figures 2-4As shown, the inner wall of the second absorption box 2 is provided with a plurality of vertical grooves 12, and the outer wall of the absorption box 10 is provided with sliding blocks 13 which are in sliding cooperation with the vertical grooves 12. Further, at least one side of the two sides of the adjacent absorption boxes 10 which are close to each other is provided with a plurality of protrusions 14, so that a gap is formed between the adjacent absorption boxes 10 to facilitate the passage of tail gas. Further, the absorption box 10 is provided with a non-woven bag (prior art, not shown in the figure), and the quicklime is placed in the non-woven bag to store the quicklime, and the non-woven bag can be taken out of the absorption box 10.
[0030] Working principle: the non-woven bag containing quicklime is placed in the absorption box 10, then the sliding block 13 on the outer wall of the lowermost absorption box 10 is aligned with the vertical groove 12 and slides to the lowermost end of the vertical groove 12, then the sliding blocks 13 on the outer walls of the remaining absorption boxes 10 are aligned with the vertical grooves 12, and the absorption boxes 10 are slid down one by one. Due to the protrusions 14, a gap is formed between the adjacent absorption boxes 10, as shown. Figure 2 After all the absorption boxes 10 are installed, the top cover 11 is placed on the top end of the second absorption box 2 (which can be connected by bolts to improve the connection firmness), and the device can be used to treat gas. Specifically, part of the tail gas introduced through the connecting pipe 3 first passes through the air holes 15 of the lowermost absorption box 10 and reacts with the quicklime in the non-woven bag to remove residual acid gas and dry the tail gas, and part of the tail gas diffuses along the gap between the lowermost absorption box 10 and the adjacent absorption box 10 to be adsorbed by the quicklime in the second absorption box 10 from the bottom. In this way, the tail gas can be treated in stages during its continuous upward diffusion, thereby effectively improving the absorption efficiency of the tail gas. In addition, when the absorption efficiency of the quicklime decreases or fails, the top cover 11 is opened, then the absorption boxes 10 are slid upward one by one from the second absorption box 2, and the absorption boxes 10 can be taken out of the second absorption box 2, then the quicklime in the absorption boxes 10 can be replaced.
Claims
1. An acid gas absorption drying device, comprising a first absorption tank (1) and a second absorption tank (2), the outlet end of the first absorption tank (1) and the inlet end of the second absorption tank (2) being connected by a connecting pipe (3); characterized in that, The first absorption tank (1) is provided with an air inlet pipe (4) at the top end, and contains lime milk; the second absorption tank (2) contains quicklime, and is provided with an air outlet pipe (5); The second absorption tank (2) is provided with at least two absorption boxes (10) arranged in an up-down manner and open at the top end, and the absorption boxes (10) are arranged in a staggered manner; each absorption box (10) is connected to the inner wall of the second absorption tank (2) on three sides, and the remaining side is arranged in a gap with the inner wall of the absorption box (10); adjacent absorption boxes (10) are left with gaps for gas to pass through; the bottom wall of the absorption box (10) is provided with air holes (15); the quicklime is contained in the absorption box (10); the air outlet end of the connecting pipe (3) penetrates the side wall of the second absorption tank (2) and is arranged below the absorption box (10), and the air outlet pipe (5) is arranged above the absorption box (10); The top end of the second absorption tank (2) is provided with a top cover (11), and each absorption box (10) is slidably connected to the inner wall of the second absorption tank (2); The inner wall of the second absorption tank (2) is provided with a plurality of vertical sliding grooves (12), and the outer wall of the absorption box (10) is provided with a sliding block (13) slidably matched with the vertical sliding grooves (12).
2. The acid gas absorption drying device according to claim 1, characterized in that, The air outlet end of the air inlet pipe (4) is provided with an inverted funnel (6), and the inverted funnel (6) and the lime milk surface are arranged in a gap.
3. The acid gas absorption drying device according to claim 2, characterized in that The first absorption tank (1) is provided with a rotating shaft (7) inside, the outer wall of the rotating shaft (7) is provided with a plurality of stirring rods (8), and the top end of the first absorption tank (1) is provided with a motor (9) fixedly connected to the top end of the rotating shaft (7).
4. The acid gas absorption drying device according to claim 1, characterized in that, At least one side of the two sides of the adjacent absorption boxes (10) is provided with a plurality of protrusions (14).
5. The acid gas absorption drying device according to claim 4, characterized in that The absorption box (10) is provided with a non-woven fabric bag, the quicklime is placed in the non-woven fabric bag, and the non-woven fabric bag can be taken out of the absorption box (10).