Environment-friendly chlorine tail gas treatment device for recovering chlorobenzoyl chloride residue and treatment method thereof

Abstract

The present application relates to tail gas treatment related technical field, specifically is chlorobenzoyl chloride residue recovery's environmental protection type chlorine tail gas treatment device and its processing method, chlorobenzoyl chloride residue recovery's environmental protection type chlorine tail gas treatment device includes support and is located on the support absorption tower, still includes the first disc, second disc, third disc in absorption tower, make the inside of absorption tower form by upper and lower distribution reaction zone, buffer zone, liquid storage zone and collection zone, the second disc is fixed in absorption tower, the first disc and the third disc seal sliding are located in the absorption tower, the first disc can be relative the second disc activity, make reaction zone and buffer zone volume change, switching mechanism can make recovery pipeline automatic conduction, reaction zone and collection zone are communicated, realize after each round processing, the automatic separate recovery function of reaction residual liquid.

Description

Technical Field

[0001] The present invention relates to the technical field related to tail gas treatment, and in particular to an environmentally friendly chlorine tail gas treatment device for recovering chlorobenzoyl chloride residue and a treatment method thereof. Background Art

[0002] During the recovery of chlorobenzoyl chloride, chlorine gas may be released due to incomplete reaction or side reactions. Chlorine is a highly toxic gas with a strong, pungent odor, posing serious hazards to humans and the environment. Therefore, effective treatment is essential. Alkali spraying is a commonly used tail gas treatment method. It primarily utilizes a strong base (such as sodium hydroxide solution) to chemically react with chlorine gas, converting it into harmless or less harmful substances.

[0003] Therefore, using a spray tower to treat chlorine tail gas is a common treatment method. Existing spray towers typically continuously and evenly pass reactants through the tower, allowing the product to naturally fall to the bottom of the tower and be reused for spraying, thus achieving recycling and conserving resources. However, this method of circulating the residual reaction liquid to the bottom of the tower can easily affect the concentration of the strong base solution, which can further weaken the chlorine treatment capacity.

[0004] To address this issue, the industry has adopted a progressive treatment approach, separating the strong base storage chamber from the reaction chamber. Specifically, a specific ratio of strong base and chlorine gas is introduced into the reaction chamber. The reaction between the two causes a pressure change within the reaction chamber. When the pressure change reaches a specific value, the valve connecting the chamber to the reaction residue recovery point automatically opens through pressure control, enabling the reaction residue to be recovered separately. However, valves that switch between open and closed states based on pressure fluctuations are prone to fluctuations in the critical conduction point, resulting in insufficient conduction time, which in turn leads to a large amount of residual reaction residue. Moreover, the complete reaction of the specific ratio of strong base and chlorine gas within the chamber is ideal; in practice, the reaction efficiency cannot reach 100%. As a result, untreated chlorine gas may remain in the reaction chamber, resulting in a high amount of chlorine gas in the ultimately recovered reaction residue, resulting in poor exhaust gas treatment. Of course, a timer may be set to control the valve conduction time. However, due to the volatility of the reaction conditions within the reaction chamber, accurately determining the timer timing parameters is quite difficult. Summary of the Invention

[0005] The object of the present invention is to provide an environmentally friendly chlorine tail gas treatment device and a treatment method for recovering chlorobenzoyl chloride residue, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The application discloses an environment-friendly chlorine tail gas treatment device for recovering chlorobenzoyl chloride residues, which comprises a support, an absorption tower arranged on the support, and the following components:

[0008] A first disc body, a second disc body and a third disc body are sequentially arranged in the absorption tower from top to bottom, so that reaction zones, buffer zones, liquid storage zones and liquid collecting zones are formed in the absorption tower from top to bottom.

[0009] The third disc body can be lifted in the absorption tower to pump strong alkali in the liquid storage zone into the reaction zone, and an electromagnetic valve for introducing chlorine gas is arranged at the top of the absorption tower.

[0010] The first disc body is connected with a recovery pipeline extending into the liquid collecting zone.

[0011] As a further scheme of the application, the atomizing mechanism comprises a conduit fixed to the second disc body and communicating with the liquid storage zone.

[0012] The outer periphery of the conduit is further sleeved with a first spring, one end of the first spring being connected to the first disc body and the other end being connected to a limiting ring fixed to the conduit.

[0013] As a further scheme of the application, a plurality of power mechanisms for driving the third disc body to ascend and descend in the absorption tower are arranged on the absorption tower.

[0014] The stand passes through the first disc body and the second disc body and is connected to the third disc body, and the stand is sealingly and slidably connected to the first disc body and the second disc body.

[0015] As a further solution of the present invention: the recovery pipeline includes a standpipe fixed to the first disk, the standpipe passes through the second disk and the third disk and extends into the liquid collection area, the standpipe is sealed and slidingly connected to the second disk and the third disk, and a valve body is also provided on the standpipe. When the valve body is opened, the standpipe can connect the reaction area with the liquid collection area, and the switching mechanism can switch the open and closed state of the valve body.

[0016] As a further solution of the present invention: the switching mechanism includes a deflection structure provided on the second disk body and an elastic release component cooperating with the deflection structure. The elastic release component can move radially along the second disk body and perform state switching action on the valve body.

[0017] As a further embodiment of the present invention, the deflection structure includes a rotating ring rotatably mounted on the second disk body, and a gear fixed to the rotating ring. The second disk body is further slidably engaged with a second movable seat capable of moving radially along the second disk body, and the second movable seat is connected to a toothed plate meshing with the gear.

[0018] The rotating ring is further provided with a sector plate cooperating with the elastic release assembly, a connecting rod is provided between the second movable seat and the first disk body, and both ends of the connecting rod are hinged to the first disk body and the tooth plate respectively.

[0019] As a further embodiment of the present invention, the elastic release assembly includes a third movable seat slidably engaged with the second disk and arranged in a "U" shape, and a follower rod slidably connected to the third movable seat, the follower rod having an annular protrusion formed thereon, and a second spring and a third spring respectively connected to the outer circumference of the follower rod on both sides of the annular protrusion;

[0020] The third movable seat is movable along the radial direction of the second disk body, the second spring and the third spring are in contact with the third movable seat at one end away from the annular protrusion, one end of the follower rod cooperates with the fan-shaped plate, and the other end is connected to the valve body.

[0021] As a further embodiment of the present invention, the valve stem of the valve body is connected to a driven rod, the driven rod is provided with a through slot, a first movable seat capable of moving radially along the first disk body is slidably engaged with the bottom of the first disk body, the first movable seat is connected to a driving post via a connecting arm, the driving post passes through the through slot and is slidably connected to the driven rod;

[0022] The first movable seat is further connected to a connecting rod, a connecting sleeve is slidably sleeved on the connecting rod, and the connecting sleeve is fixed to the follower rod.

[0023] As a further solution of the present invention: a second boss is provided at one end of the follower rod away from the connecting sleeve, a first boss is provided on the third movable seat, and a bending groove and a fan-shaped groove are provided on the fan-shaped plate, which are respectively adapted to the first boss and the second boss, and the first boss and the second boss extend into the bending groove and the fan-shaped groove respectively and are slidably connected to the fan-shaped plate.

[0024] The method for treating chlorine tail gas using the environmentally friendly chlorine tail gas treatment device comprises the following steps:

[0025] Step 1: The reactants are introduced, the solenoid valve is opened, the third disk rises, chlorine gas and strong base enter the reactor, and the atomization mechanism atomizes the strong base;

[0026] Step 2: The reaction proceeds and the first disk moves until the volume change of the buffer zone reaches a preset value;

[0027] Step 3: After the reaction is completed, the residual liquid is recovered, and the switching mechanism connects the recovery pipeline, and the residual liquid enters the liquid collection area;

[0028] Step 4: The recovery pipeline is restored to a closed state for the next round of reaction.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present application arranges a first tray, a second tray, and a third tray in the absorption tower, which are arranged from top to bottom, so that the interior of the absorption tower is divided into a reaction zone, a buffer zone, a liquid storage zone, and a liquid collection zone, which are arranged from top to bottom.

[0031] During operation, when the pressure in the reaction zone changes, the first disc can automatically move upward according to the pressure change, reducing the capacity of the reaction zone and realizing the automatic pressure replenishment function. It has the function of weakening the pressure difference between the reaction zone and the liquid collection zone, avoiding the problem that after the valve body is opened, the reaction residual liquid in the reaction zone flows too fast due to excessive pressure difference, and even the chlorine gas that has not been processed in the reaction zone is recovered together, resulting in treatment omissions.

[0032] In addition, during the movement of the switching mechanism, after the valve body opens, in order to balance the pressure, the first spring will rebound, and the rebound process of the first spring is related to the pressure in the reaction area. During this process, the second protrusion is in the third groove, and the valve body still remains in the open state, which has a delay effect, thereby providing time for the removal of the residual reaction liquid, making up for the shortcomings of using a timer to control the duration. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The present invention is a structural schematic diagram of an embodiment of an environmentally friendly chlorine tail gas treatment device for recovering chlorobenzoyl chloride residue.

[0034] Figure 2 The present invention is a structural schematic diagram from another angle of an embodiment of an environmentally friendly chlorine tail gas treatment device for recovering chlorobenzoyl chloride residue.

[0035] Figure 3 A schematic diagram of the internal structure of an absorption tower in one embodiment of an environmentally friendly chlorine tail gas treatment device for recovering chlorobenzoyl chloride residue.

[0036] Figure 4 A schematic structural diagram of another angle inside the absorption tower of an embodiment of an environmentally friendly chlorine tail gas treatment device for recovering chlorobenzoyl chloride residue.

[0037] Figure 5 for Figure 4 A magnified view of the structure at point A.

[0038] Figure 6 Schematic diagram of the distribution of the first tray, the second tray, and the third tray in one embodiment of an environmentally friendly chlorine tail gas treatment device for recovering chlorobenzoyl chloride residue.

[0039] Figure 7 A schematic diagram of the distribution of multiple groups of atomization mechanisms in one embodiment of an environmentally friendly chlorine tail gas treatment device for recovering chlorobenzoyl chloride residue.

[0040] Figure 8 An exploded diagram of the structure of the switching mechanism in one embodiment of an environmentally friendly chlorine tail gas treatment device for recovering chlorobenzoyl chloride residue.

[0041] In the figure: 1, support; 2, absorption tower; 201, conduction port; 202, liquid inlet; 203, liquid outlet; 3, first plate; 4, second plate; 5, third plate; 6, hydraulic cylinder; 7, column; 8, connecting plate; 9, guide tube; 901, limit ring; 10, atomizing nozzle; 11, first spring; 12, riser; 13, valve body; 14, driven rod; 15, connecting rod; 16, first movable seat; 17, connecting arm; 1701, driving column; 18, second movable seat; 19, Tooth plate; 20. Gear; 21. Rotating ring; 22. Fan-shaped plate; 2201. First groove; 2202. Second groove; 2203. Third groove; 2204. Fourth groove; 2205. Fifth groove; 2206. Sixth groove; 23. Third movable seat; 2301. First boss; 24. Follower rod; 2401. Annular protrusion; 2402. Second boss; 25. Connecting sleeve; 26. Connecting rod; 27. Second spring; 28. Third spring; 29. ​​Solenoid valve. DETAILED DESCRIPTION

[0042] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0043] In addition, the elements in the present application are referred to as "fixed to" or "provided on" another element, which can be directly on another element or can have a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or can have a middle element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0044] Please refer to Figures 1-8 In the embodiments of the present application, the chlorobenzoyl chloride residue recovery environment-friendly chlorine tail gas treatment device comprises a support 1 and an absorption tower 2 provided on the support 1, and further comprises:

[0045] A first disc body 3, a second disc body 4 and a third disc body 5 are sequentially provided in the absorption tower 2 from top to bottom, so that the absorption tower 2 forms reaction zones, buffer zones, liquid storage zones and liquid collection zones distributed from top to bottom inside the absorption tower 2. The second disc body 4 is fixed in the absorption tower 2, and the first disc body 3 and the third disc body 5 are sealingly and slidably arranged in the absorption tower 2. The first disc body 3 can move relative to the second disc body 4 to change the volume of the reaction zone and the buffer zone.

[0046] Among them, the reaction zone and the liquid storage zone are communicated through a plurality of atomization mechanisms, and the third disc body 5 can be raised in the absorption tower 2 to pump the strong base in the liquid storage zone to the reaction zone. The top of the absorption tower 2 is provided with a solenoid valve 29 for introducing chlorine gas.

[0047] The first disc body 3 is connected with a recovery pipeline extending into the liquid collection zone. When the volume change of the buffer zone reaches a preset value, a switching mechanism provided in the buffer zone is triggered to switch the closed state of the recovery pipeline to the conducting state, so that the reacted liquid in the reaction zone enters the liquid collection zone.

[0048] Further, the method for treating chlorine tail gas in the present application is an alkali absorption method, which utilizes the neutralization reaction between strong base (such as sodium hydroxide) and chlorine gas to generate hypochlorite and chloride, thereby removing chlorine gas in the tail gas.

[0049] Specifically, during operation, the solenoid valve 29 is automatically controlled by a program. Whenever the solenoid valve 29 is opened, the chlorine tail gas can enter the reaction zone. At the same time, the third disk 5 rises in the absorption tower 2, and the strong alkali in the liquid storage area can be pumped into the reaction zone through the atomization mechanism.

[0050] It is worth mentioning that after the strong alkali passes through the atomization mechanism, it can enter the reaction zone in the form of atomization. The surface area of ​​the strong alkali is greatly increased after atomization, and the contact area with the chlorine is also increased, so that the chlorine molecules can react with the strong alkali more quickly, thereby accelerating the reaction process. Secondly, atomization helps the reaction to be more complete. The evenly distributed atomized droplets can allow the chlorine molecules to contact the strong alkali more evenly, reducing the situation where the local concentration is too high or too low, making the reaction more uniform, and improving the conversion rate of chlorine. Since the reaction is more complete, the chlorine content in the tail gas will be reduced, thereby reducing pollution to the environment, meeting the requirements of environmentally friendly chlorine tail gas treatment.

[0051] It should be noted that when chlorine and a strong base are introduced into the reaction zone for reaction, the chlorine is consumed as a gas, and no gas is generated, resulting in a decrease in the amount of gas in the reaction zone and a decrease in pressure. Although the reaction is exothermic, releasing heat and causing a temperature increase, which accelerates the movement of gas molecules and increases pressure, in this reaction, the effect of the decrease in gas amount outweighs the effect of the temperature increase, resulting in an overall decrease in pressure in the reaction zone. Consequently, the first tray 3 moves upward relative to the second tray 4.

[0052] It should be explained that the preset value is the corresponding pressure value in the reaction zone when the reaction is completed, which causes the change in the buffer zone.

[0053] Please refer again Figure 7 The atomizing mechanism includes a conduit 9 fixed to the second disk 4 and connected to the liquid storage area. The conduit 9 passes through the first disk 3 and is sealed and slidably connected to the first disk 3. An atomizing nozzle 10 is installed at one end of the conduit 9 away from the second disk 4. The atomizing nozzle 10 is located above the first disk 3.

[0054] Among them, for the atomizing nozzle 10, its model is not specifically limited in this application. Of course, its material must be corrosion-resistant to avoid strong alkali corrosion and poor durability.

[0055] A first spring 11 is further sleeved on the outer circumference of the conduit 9 . One end of the first spring 11 is connected to the first disk 3 , and the other end is connected to a limiting ring 901 fixed on the conduit 9 .

[0056] When the reaction occurs, the first disc body 3 moves upward due to the decrease of the pressure in the reaction area, and the first spring 11 is compressed, so that the volume of the reaction area and the buffer area changes, specifically, the volume of the reaction area decreases and the volume of the buffer area increases, thus achieving the automatic expansion effect of the reaction area, avoiding the bad influence on the sealing performance of the absorption tower 2 due to the fixed volume of the reaction area under the pressure change, thereby effectively reducing the risk of chlorine leakage due to the damage of the sealing function and improving the safety of the work.

[0057] It should be pointed out that in order to ensure that the first disc body 3 can smoothly adapt to the environmental change in the reaction area and move during the reaction, the buffer area cannot be a closed chamber, and for this purpose, the absorption tower 2 is also provided with a through port 201 which communicates the buffer area with the outside.

[0058] Secondly, it should be added that the absorption tower 2 is also provided with a liquid inlet 202 and a liquid outlet 203, the liquid inlet 202 communicates with the liquid storage area and is used to supplement the strong base in the liquid storage area, it should be emphasized that the liquid inlet 202 is equipped with a control valve, when the strong base is supplemented, the control valve is opened, after the supplement is completed, the control valve is closed, so that when the third disc body 5 rises during the subsequent treatment of the chlorine tail gas, the strong base in the liquid storage area can enter the conduit 9 and finally participate in the reaction in the form of atomization in the reaction area; the liquid outlet 203 communicates with the liquid collection area, through which the liquid (i.e. the liquid after the reaction of strong base and chlorine) in the liquid collection area can be recovered, specifically, after the reaction residual liquid is guided out through the liquid outlet 203, the reaction residual liquid can be detected to further realize the recovery of the strong base solution, thereby saving raw materials, secondly, the gas in the liquid collection area can be directly discharged into the activated carbon filtering device to further ensure the thoroughness of the tail gas treatment.

[0059] Please refer again to Figure 6 , the absorption tower 2 is provided with a plurality of power mechanisms for driving the third disc body 5 to rise and fall in the absorption tower 2, the power mechanism includes a hydraulic cylinder 6 installed on the support 1 and a vertical column 7 fixed to the movable end of the hydraulic cylinder 6 through a connecting plate 8; the vertical column 7 penetrates the first disc body 3 and the second disc body 4 and connects the third disc body 5, and the vertical column 7 is in sealed sliding connection with the first disc body 3 and the second disc body 4.

[0060] During operation, whenever strong alkali needs to be sprayed into the reaction zone, the hydraulic cylinder 6 operates to drive the third plate 5 to rise a certain distance in the absorption tower 2 through the connecting plate 8 and the column 7. Then, the strong alkali in the liquid storage area can enter the conduit 9 and then diffuse in the reaction zone in the form of atomization through the atomizing nozzle 10;

[0061] It should be noted that, during each reaction, the rising stroke of the third disk 5, that is, the injection amount of the strong alkali, needs to be controlled. At the same time, the opening time of the solenoid valve 29 is strictly controlled to control the amount of chlorine introduced, so as to avoid the problem of waste of resources and insufficient chlorine treatment caused by the incoordination of the amount of strong alkali and chlorine.

[0062] Please refer again Figure 5 and Figure 6 The recovery pipeline includes a standpipe 12 fixed to the first disk 3, the standpipe 12 passes through the second disk 4 and the third disk 5 and extends into the liquid collection area, the standpipe 12 is sealed and slidably connected to the second disk 4 and the third disk 5, and a valve body 13 is further provided on the standpipe 12. When the valve body 13 is opened, the standpipe 12 can connect the reaction area with the liquid collection area, and the switching mechanism can switch the open and closed states of the valve body 13.

[0063] Furthermore, the valve body 13 can be a ball valve or a butterfly valve. During operation, as the reaction in the reaction zone proceeds, when the pressure in the reaction zone reaches a preset value, the switching mechanism switches the valve body 13 from a closed state to an open state. Then, the reacted liquid on the first tray 3 flows into the liquid collection area through the riser 12, thereby realizing the automatic recovery function of the reacted liquid after the reaction is completed.

[0064] In order to prevent liquid residue from appearing on the first tray 3 , a conical concave surface is provided on the upper portion of the first tray 3 , thereby facilitating the liquid to gather at the riser 12 .

[0065] The present application provides a first disk 3 that can move according to the reaction progress, so that the volume of the buffer zone and the reaction zone changes. After each reaction is completed, the switching mechanism can switch the closed state of the valve body 13 to the open state, so that the reacted liquid is recovered into the liquid collection area through the riser 12;

[0066] Therefore, the device can realize the function of automatically recycling the reaction residual liquid after each reaction. In some existing spray towers, the reaction residual liquid is usually directly recycled to the strong alkali solution, which will cause the concentration of the strong alkali to gradually decrease. With the decrease of the concentration of the strong alkali, its processing capacity for chlorine gas will also weaken, which may cause the problem of insufficient chlorine gas processing. By recycling the reaction residual liquid separately, the device avoids the influence of the residual liquid on the concentration of the strong alkali, and ensures that the processing capacity of the strong alkali remains stable. This design not only improves the reliability of chlorine gas processing, but also optimizes the reaction efficiency.

[0067] On the other hand, the present application sets the first disc body 3, the second disc body 4 and the third disc body 5 distributed from top to bottom in the absorption tower 2, so that the inside of the absorption tower 2 is divided into reaction zone, buffer zone, liquid storage zone and liquid collection zone arranged from top to bottom;

[0068] When the pressure in the reaction zone changes during work, the first disc body 3 can automatically move upward according to the change of the pressure, so that the capacity of the reaction zone is reduced, realizing the function of automatically supplementing the pressure, weakening the pressure difference between the reaction zone and the liquid collection zone, avoiding the problem that the reaction residual liquid in the reaction zone flows too fast after the valve body 13 is turned on due to the too large pressure difference, and even the chlorine gas that has not been treated in the reaction zone is also recycled, resulting in the problem of processing omission.

[0069] Please refer to Figure 5 , Figure 7 and Figure 8 , the switching mechanism includes a deflection structure provided on the second disc body 4 and an elastic release assembly matched with the deflection structure, the elastic release assembly can move radially along the second disc body 4, and performs state switching action on the valve body 13. The deflection structure includes a rotating ring 21 rotatably installed on the second disc body 4, a gear 20 fixed on the rotating ring 21, and a second movable seat 18 slidably embedded on the second disc body 4 and capable of moving radially along the second disc body 4, the second movable seat 18 is connected with a toothed plate 19 engaged with the gear 20. The rotating ring 21 is also provided with a sector plate 22 matched with the elastic release assembly, the second movable seat 18 and the first disc body 3 are provided with a connecting rod 15, and the two ends of the connecting rod 15 are respectively hinged with the first disc body 3 and the toothed plate 19.

[0070] Further, the inner diameter of the rotating ring 21 is greater than the outer diameter of the stand pipe 12, so that the stand pipe 12 can smoothly pass through.

[0071] During the reaction, when the first disc 3 moves upward, the first disc 3 can pull the toothed plate 19 to move through the connecting rod 15. The second movable seat 18 is used to guide the toothed plate 19. The second movable seat 18 slides toward the rotating ring 21. The toothed plate 19 causes the rotating ring 21 to drive the sector plate 22 to deflect through the gear 20.

[0072] When the volume change of the buffer zone reaches a preset value, that is, the deflection degree of the sector plate 22 reaches a certain value, the elastic release component is triggered to switch the closed state of the valve body 13 to the open state, so that the residual reaction liquid in the reaction zone can be recovered to the liquid collection area through the riser 12.

[0073] The elastic release assembly includes a third movable seat 23 slidably engaged with the second plate 4 and arranged in a "U" shape, and a follower rod 24 slidably connected to the third movable seat 23. The follower rod 24 is formed with an annular protrusion 2401. The two sides of the annular protrusion 2401 are respectively connected to a second spring 27 and a third spring 28 sleeved on the outer circumference of the follower rod 24.

[0074] The third movable seat 23 is capable of moving radially along the second disk body 4. The ends of the second spring 27 and the third spring 28, which are away from the annular protrusion 2401, abut against the third movable seat 23. One end of the follower rod 24 engages with the sector plate 22, and the other end is connected to the valve body 13. The valve stem of the valve body 13 is connected to the follower rod 14, which is provided with a through slot. The bottom of the first disk body 3 is slidably engaged with the first movable seat 16 capable of moving radially along the first disk body 3. The first movable seat 16 is connected to a drive post 1701 via a connecting arm 17. The drive post 1701 extends through the through slot and is slidably connected to the follower rod 14. The first movable seat 16 is also connected to a connecting rod 26, which is slidably fitted with a connecting sleeve 25, which is fixed to the follower rod 24. A second boss 2402 is provided at one end of the follower rod 24 away from the connecting sleeve 25, a first boss 2301 is provided on the third movable seat 23, and a bending groove and a fan-shaped groove respectively adapted to the first boss 2301 and the second boss 2402 are provided on the fan-shaped plate 22, the first boss 2301 and the second boss 2402 respectively extend into the bending groove and the fan-shaped groove and are slidably connected to the fan-shaped plate 22.

[0075] It should be supplemented that the fan-shaped groove includes a first groove 2201, a second groove 2202, a third groove 2203 and a fourth groove 2204 that are connected;

[0076] The bending groove includes a fifth groove 2205 and a sixth groove 2206 connected to each other, wherein the fifth groove 2205 is concentric with the rotating ring 21, and the distance between one end of the sixth groove 2206 connecting the fifth groove 2205 and the center of the rotating ring 21 is greater than the distance between the other end of the sixth groove 2206 and the center of the rotating ring 21.

[0077] Attach Figure 7 Taking the state shown as an example, at this time, the first protrusion 2301 is located at the end of the fifth groove 2205 away from the sixth groove 2206, the second protrusion 2402 is located at the connection between the first groove 2201 and the fourth groove 2204, and the valve body 13 is in a closed state;

[0078] As the reaction proceeds, the first disk 3 moves upward, causing the toothed plate 19 to deflect the sector plate 22 via the gear 20 (at this time, the connecting sleeve 25 and the connecting rod 26 slide relative to each other), and the first spring 11 is gradually compressed. The first groove 2201 passes the second protrusion 2402. At the same time, the fifth groove 2205 and the sixth groove 2206 pass the first protrusion 2301 in sequence. When the fifth groove 2205 passes the first protrusion 2301, the third movable seat 23 does not move. When the sixth groove 2206 passes the first protrusion 2301, it causes the first protrusion 2301 and the third movable seat 23 to give way. Specifically, the third movable seat 23 slides toward the rotating ring 21. Since the second protrusion 2402 is still located in the first groove 2201 at this time, the second spring 27 is compressed.

[0079] When the connection between the first groove 2201 and the second groove 2202 corresponds to the second protrusion 2402, the second spring 27 rebounds, causing the follower rod 24 to move toward the rotating ring 21, and the second protrusion 2402 reaches the connection between the second groove 2202 and the third groove 2203. Accordingly, the follower rod 24 also drives the first movable seat 16 to slide close to the valve body 13 through the connecting sleeve 25 and the connecting rod 26. The connecting arm 17 and the driving column 1701 move together with the first movable seat 16. The driving column 1701 and the driven rod 14 slide together, causing the driven rod 14 to drive the valve stem of the valve body 13 to rotate, so that the valve body 13 is opened.

[0080] After the valve body 13 is opened, the reaction zone and the liquid collection zone are communicated, and the reaction residual liquid on the first disc body 3 can enter the liquid collection zone through the stand pipe 12 for recovery. At the same time, the first spring 11 rebounds (the elastic potential energy of the first spring 11 is greater than the elastic potential energy of the second spring 27 and the third spring 28), so that the first disc body 3 moves upward to reset. During this process, the toothed plate 19 drives the rotating ring 21 to drive the sector plate 22 to reset in the reverse direction through the gear 20.

[0081] During the resetting process of the sector plate 22, the third groove 2203 passes through the second protruding column 2402, the sixth groove 2206 and the fifth groove 2205 pass through the first protruding column 2301 in turn, and when the fifth groove 2205 passes through the first protruding column 2301, the first protruding column 2301 and the third movable seat 23 are displaced, specifically, the third movable seat 23 slides away from the rotating ring 21. Since the second protruding column 2402 is still located in the third groove 2203 at this time, the third spring 28 is compressed.

[0082] When the sector plate 22 is reset, the connection position of the third groove 2203 and the fourth groove 2204 corresponds to the second protruding column 2402, and then the third spring 28 rebounds to drive the follower rod 24 to move away from the rotating ring 21. The connection position of the first groove 2201 and the fourth groove 2204 of the second protruding column 2402, correspondingly, the follower rod 24 drives the first movable seat 16 to slide away from the valve body 13 through the connecting sleeve 25 and the connecting rod 26. The connecting arm 17 and the driving column 1701 move together with the first movable seat 16, the driving column 1701 and the driven rod 14 are in sliding fit, which drives the driven rod 14 to rotate the valve stem of the valve body 13, so that the valve body 13 returns to the closed state, facilitating the next round of reaction.

[0083] Therefore, through the cooperation of various structures, the device realizes the automatic switching of the valve body 13 state by using the mechanical interlocking mechanism, and has the characteristics of fast response. The transmission design of each component ensures the timeliness of the switching process, avoiding the occurrence of delay phenomenon. In addition, this design adapts to the complex working conditions of the absorption tower 2, effectively reduces the failure rate of the valve body 13 state switching function, thereby providing reliable guarantee for the stable operation of the absorption tower 2.

[0084] Further, during the movement process of the switching mechanism, after the valve body 13 is opened, in order to balance the pressure, the first spring 11 rebounds, and the rebounding process of the first spring 11 is related to the pressure in the reaction zone. During this process, the second protruding column 2401 is located in the third groove 2203, and the valve body 13 still remains in the open state, which has a delay effect, so as to provide time for the removal of the reaction residual liquid, making up for the deficiency of using a timer to control the time length.

[0085] As another embodiment of the present invention, a method for treating chlorine tail gas using the environmentally friendly chlorine tail gas treatment device is also proposed, comprising the following steps:

[0086] Step 1: reactants are introduced, the solenoid valve 29 is opened, the third disk 5 rises, chlorine and strong base enter the reactor, and the atomizing mechanism atomizes the strong base;

[0087] Step 2: The reaction proceeds and the first disk 3 moves until the volume change of the buffer zone reaches a preset value;

[0088] Step 3: After the reaction is completed, the residual liquid is recovered, and the switching mechanism connects the recovery pipeline, and the residual liquid enters the liquid collection area;

[0089] Step 4: The recovery pipeline is restored to a closed state for the next round of reaction.

[0090] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0091] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An environmentally friendly chlorine tail gas treatment device for recovering chlorobenzoyl chloride residue, comprising a support and an absorption tower arranged on the support; It is characterized by: Also includes: The first tray, the second tray, and the third tray are sequentially arranged in the absorption tower from top to bottom, so that a reaction zone, a buffer zone, a liquid storage zone, and a liquid collection zone are formed in the absorption tower from top to bottom. The second tray is fixed in the absorption tower, and the first tray and the third tray are sealed and slidably arranged in the absorption tower. The first tray can move relative to the second tray to promote volume changes in the reaction zone and the buffer zone. The reaction zone and the liquid storage zone are connected by multiple groups of atomization mechanisms. The third disk can rise in the absorption tower to pump the strong base in the liquid storage zone into the reaction zone. The top of the absorption tower is provided with a solenoid valve for introducing chlorine gas. The first disc is connected to a recovery pipeline extending into the liquid collection area. When the volume change of the buffer area reaches a preset value, a switching mechanism provided in the buffer area is triggered to switch the closed state of the recovery pipeline to a conducting state, so that the reacted liquid in the reaction area enters the liquid collection area. The recovery pipeline includes a standpipe fixed to the first disk, the standpipe passing through the second disk and the third disk and extending into the liquid collection area, the standpipe being in sealing and sliding connection with the second disk and the third disk, and a valve body being further provided on the standpipe. When the valve body is opened, the standpipe can connect the reaction area with the liquid collection area, and the switching mechanism can switch the open and closed states of the valve body; The switching mechanism includes a deflection structure provided on the second disc body and an elastic release component cooperating with the deflection structure, wherein the elastic release component is movable along the radial direction of the second disc body and performs a state switching action on the valve body; The deflection structure includes a rotating ring rotatably mounted on the second disk body, a gear fixed to the rotating ring, a second movable seat slidably engaged with the second disk body and capable of moving radially along the second disk body, and the second movable seat is connected to a toothed plate meshing with the gear; The rotating ring is further provided with a sector plate cooperating with the elastic release assembly, and a connecting rod is provided between the second movable seat and the first disk body, and the two ends of the connecting rod are hinged to the first disk body and the tooth plate respectively; The elastic release assembly includes a third movable seat slidably engaged on the second disk body and arranged in a "U" shape, and a follower rod slidably connected to the third movable seat, the follower rod having an annular protrusion formed on the follower rod, and a second spring and a third spring respectively connected to the outer circumference of the follower rod on both sides of the annular protrusion; The third movable seat is movable along the radial direction of the second disk body, one end of the second spring and the third spring away from the annular protrusion abuts against the third movable seat, one end of the follower rod is engaged with the sector plate, and the other end is connected to the valve body; The valve stem of the valve body is connected to a driven rod, and a through slot is provided on the driven rod. A first movable seat capable of moving radially along the first disk body is slidably engaged with the bottom of the first disk body. The first movable seat is connected to a driving column via a connecting arm. The driving column passes through the through slot and is slidably connected to the driven rod. The first movable seat is further connected to a connecting rod, a connecting sleeve is slidably sleeved on the connecting rod, and the connecting sleeve is fixed to the follower rod; A second boss is provided at one end of the follower rod away from the connecting sleeve, a first boss is provided on the third movable seat, and a bending groove and a fan-shaped groove are provided on the fan-shaped plate, which are respectively adapted to the first boss and the second boss. The first boss and the second boss extend into the bending groove and the fan-shaped groove respectively and are slidably connected to the fan-shaped plate.

2. The environmentally friendly chlorine tail gas treatment device for recovering chlorobenzoyl chloride residue according to claim 1, characterized in that: The atomizing mechanism includes a conduit fixed to the second disk and connected to the liquid storage area, the conduit passing through the first disk and being in sealing and sliding connection with the first disk, and an atomizing nozzle mounted on an end of the conduit away from the second disk, the atomizing nozzle being located above the first disk; A first spring is further sleeved on the outer circumference of the catheter. One end of the first spring is connected to the first disk, and the other end is connected to a limiting ring fixed on the catheter.

3. The environmentally friendly chlorine tail gas treatment device for recovering chlorobenzoyl chloride residue according to claim 1, characterized in that, The absorption tower is provided with multiple sets of power mechanisms for driving the third disk to rise and fall in the absorption tower, and the power mechanisms include a hydraulic cylinder mounted on the support and a column fixed to the movable end of the hydraulic cylinder through a connecting plate; The column passes through the first disk body and the second disk body and is connected to the third disk body, and the column is sealed and slidably connected to the first disk body and the second disk body.

4. A method for treating chlorine tail gas using the environmentally friendly chlorine tail gas treatment device according to claim 1, characterized in that: The following steps are involved: Step 1: The reactants are introduced, the solenoid valve is opened, the third disk rises, chlorine gas and strong base enter the reactor, and the atomization mechanism atomizes the strong base; Step 2: The reaction proceeds and the first disk moves until the volume change of the buffer zone reaches a preset value; Step 3: After the reaction is completed, the residual liquid is recovered, and the switching mechanism connects the recovery pipeline, and the residual liquid enters the liquid collection area; Step 4: The recovery pipeline is restored to a closed state for the next round of reaction.

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