Wastewater treatment system for o-chlorobenzaldehyde production
By designing a wastewater treatment system including adsorption tanks, raw material tanks, distillation tanks and condensers, the problem of unrecycled ortho-chlorobenzaldehyde in wastewater is solved, and efficient resource recycling and production costs are achieved.
Patent Information
- Application Number
- CN202421816868.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-30
AI Technical Summary
During the production process of o-chlorobenzaldehyde, the wastewater contains some unrecycled o-chlorobenzaldehyde, resulting in waste of resources and increased wastewater treatment costs.
A wastewater treatment system is designed, including an adsorption tank, a raw material tank, a distillation tank and a condenser. The wastewater is uniformly sprayed through the spray tray and a uniform plate, and the ortho-chlorobenzaldehyde is adsorbed in it by the adsorption resin layer. Then, the substances in the resin layer are desorbed through the desorption solution, and the desorption solution is recovered and reused through distillation and condensation.
Effective recycling of ortho-chlorobenzaldehyde in wastewater increases yields in the production process, avoids resource waste, and reduces wastewater treatment costs.
Smart Images
Figure CN222907596U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wastewater recovery and treatment, in particular to a wastewater treatment system for the production of o-chlorobenzaldehyde. Background Art
[0002] O-chlorobenzaldehyde is an important organic synthesis intermediate with wide applications. It is the main raw material for manufacturing pharmaceuticals such as o-chlorobenzyl cyanide, o-chlorobenzyl cyanide chloride, and sodium cloxacillin. O-chlorobenzaldehyde is widely used in the manufacture of highly efficient acaricides, such as hexythiazox products, which have good control effects on mites in dry crops and fruit trees. O-chlorobenzaldehyde is the raw material for manufacturing dye intermediates and can be used to synthesize common dye products such as fluorescent brightener CBS, and is widely used in industries such as textile and printing. Currently, in the production process of o-chlorobenzaldehyde, o-chlorotoluene and chlorine are usually used as raw materials, and o-chlorobenzaldehyde is obtained through processes such as chlorination, rectification, hydrolysis, and distillation. However, the wastewater after production usually still contains some o-chlorobenzaldehyde. Direct discharge will pollute the environment. Failure to recycle it will not only cause waste of resources but also increase the wastewater treatment cost of production enterprises. Therefore, it is necessary to develop a wastewater treatment system for the production of o-chlorobenzaldehyde that can effectively recover o-chlorobenzaldehyde in wastewater and improve the recovery rate of o-chlorobenzaldehyde. Summary of the Utility Model
[0003] Aiming at the above technical problems, the utility model provides a wastewater treatment system for the production of o-chlorobenzaldehyde that can effectively recover o-chlorobenzaldehyde in wastewater and improve the recovery rate of o-chlorobenzaldehyde, so as to solve the problem of serious waste of resources caused by the failure to effectively recover o-chlorobenzaldehyde in wastewater during the current production process of o-chlorobenzaldehyde.
[0004] To solve the above technical problems, a wastewater treatment system for the production of o-chlorobenzaldehyde described in the utility model includes an adsorption tank. The upper end of the adsorption tank is connected with a feed pipe, and the lower end is connected with a discharge pipe. It also includes a raw material tank, and a raw material pump is connected to the raw material tank. The input end of the raw material pump is connected with a pipe extending into the interior of the raw material tank, and the output end is connected with a feeding pipe connected to the feed pipe. The feed pipe extends into the adsorption tank and is fixedly connected with a spraying tray. In the adsorption tank, not less than one material leveling plate is fixedly connected below the spraying tray. An adsorption resin layer is filled below the material leveling plate. The discharge pipe is connected to a waste discharge pipe and a recovery pipe through a tee. The recovery pipe is connected to a distillation tank. The upper end of the distillation tank is connected with a condenser through a pipe. The discharge port of the condenser is connected with the upper end of the raw material tank through a pipe.
[0005] Further, the spraying tray is in the shape of a bamboo hat, and a plurality of material discharging holes are formed in the inner wall of the spraying tray.
[0006] Further, the material leveling plate is in the shape of a bamboo hat, and a plurality of through holes are formed in the material leveling plate. The upper part of the material leveling plate at the uppermost end extends into the inside of the material spraying disc.
[0007] Further, a booster pump is connected to the feed pipe.
[0008] Further, a collecting pipe is connected to the bottom of the distillation tank.
[0009] Further, valves are fixedly connected to the feed pipe, the waste discharge pipe, the recovery pipe, the collecting pipe, and the feeding pipe.
[0010] The utility model has the following advantages compared with the prior art:
[0011] By arranging a material spraying disc in the shape of a bamboo hat connected to the feed pipe in the upper part of the adsorption tank, a material leveling plate in the shape of a bamboo hat and an adsorption resin layer are arranged below the material spraying disc, the wastewater can be evenly distributed, and the o-chlorobenzaldehyde in the wastewater can be fully adsorbed; by arranging a raw material tank and connecting it to the adsorption tank by using a feeding pipe, the o-chlorobenzaldehyde adsorbed in the resin adsorption layer can be desorbed by using a desorption solution; by arranging a distillation tank and a condenser and connecting the condenser to the raw material tank by using a pipeline, the desorption solution in the desorbed solution can be distilled out, and then condensed and enter the raw material tank, the recovery and reuse of the desorption solution can be realized, and the distilled o-chlorobenzaldehyde can be collected at the same time, so as to effectively recover the o-chlorobenzaldehyde in the wastewater, improve the yield of o-chlorobenzaldehyde production, and avoid the problem of resource waste in the production process. Description of the Drawings
[0012] Figure 1 It is a schematic structural diagram of the utility model.
[0013] In the figure: 1. Adsorption tank, 2. Feed pipe, 3. Material spraying disc, 4. Material leveling plate, 5. Adsorption resin layer, 6. Three-way joint, 7. Waste discharge pipe, 8. Recovery pipe, 9. Raw material tank, 10. Distillation tank, 11. Condenser, 12. Collecting pipe, 13. Feeding pipe, 14. Raw material pump, 15. Booster pump, 16. Valve. Detailed Embodiment
[0014] The following further describes the utility model with reference to the accompanying drawings.
[0015] As Figure 1A wastewater treatment system for the production of o-chlorobenzaldehyde as shown, including an adsorption tank 1. The upper end of the adsorption tank 1 is connected to a feed pipe 2, and the lower end is connected to a discharge pipe. It also includes a raw material tank 9. The upper end of the raw material tank 9 is fixedly connected with a raw material pump 14 by bolts. The input end of the raw material pump 14 is connected to a pipe extending to the lower part inside the raw material tank 9, and the output end is connected to a feed pipe 13 that communicates with the lower part of the feed pipe 2. In order to facilitate the control of pouring methanol solution for desorption, a valve 16 is connected to the feed pipe 13. The feed pipe 2 extends to the upper part inside the adsorption tank 1 and is fixedly connected with a spraying tray 3. Inside the adsorption tank 1, not less than one material leveling plate 4 is fixedly connected below the spraying tray 3. An adsorption resin layer 5 is filled below the material leveling plate 4. The discharge pipe is connected to a waste discharge pipe 7 and a recovery pipe 8 respectively through a tee 6. Valves 16 are fixedly connected to both the waste discharge pipe 7 and the recovery pipe 8. The other end of the recovery pipe 8 is connected to the feed port of a distillation tank 10. In order to enable the desorbed solution to smoothly enter the distillation tank 10, a liquid pump is connected to the recovery pipe 8. The upper end of the distillation tank 10 is connected to the feed end of a condenser 11 through a pipe, and the discharge port of the condenser 11 is connected to the upper end of the raw material tank 9 through a pipe.
[0016] It should be noted that in this embodiment, in order to ensure a good adsorption effect, the number of the material leveling plates 4 is three, and similarly, the adsorption resin layer 5 is provided with three layers. The top of the raw material tank 9 is connected with a feeding port, and a cover is connected to the feeding port.
[0017] In order to enable the incoming wastewater or methanol solution to be evenly distributed and improve the adsorption effect and desorption effect, the spraying tray 3 is in the shape of a bamboo hat, and a number of material discharging holes are opened on the inner wall of the spraying tray 3. In order to further improve the adsorption effect and desorption effect, the material leveling plate 4 is in the shape of a bamboo hat, and a number of through holes are opened on the material leveling plate 4. The upper part of the uppermost material leveling plate 4 extends into the interior of the spraying tray 3.
[0018] In order to increase the pressure of the wastewater entering the spraying tray 3 and ensure that the wastewater is evenly distributed and sprayed, a booster pump 15 is connected to the feed pipe 2; in order to facilitate the control of the feeding, a valve 16 is connected to the feed pipe 2.
[0019] It should be noted that the valve 16 and the booster pump 15 on the feed pipe 2 are both located above the connection between the feed pipe 2 and the feed pipe 13.
[0020] In order to facilitate the collection of the o-chlorobenzaldehyde solution obtained after distillation, a collection pipe 12 is connected to the bottom of the distillation tank 10, and a valve 16 is connected to the collection pipe 12.
[0021] It should be noted that in this embodiment, the raw material tank 9 is a commonly used storage tank in the chemical industry for storing the desorption solution methanol, and its specific structure will not be elaborated too much; the distillation tank 10 and the condenser 11 are both existing devices commonly used in the chemical industry, and it is only necessary to meet the distillation and condensation requirements. The distillation tank 10 is an electrically heated distillation tank, and a circulation pipe with a spiral structure is arranged inside the condenser 11. The circulation pipe is used to connect the condensing medium, and both ends of the circulation pipe extend to the outside of the condenser 11. Therefore, in this embodiment, the specific structures of the distillation tank 10 and the condenser 11 will not be described in too much detail in words. In this embodiment, the valve 16 can be selected to have a ball valve structure.
[0022] The working process of this embodiment is as follows:
[0023] During the production process of o-chlorobenzaldehyde, the generated wastewater is collected and connected to the feed pipe 2. Start the booster pump 15 to run, so that the wastewater is evenly sprayed out from the material discharge holes formed on the spraying tray 3, and falls through the through holes on the material leveling plate 4 to the adsorption resin layer 5. Through the adsorption of the adsorption resin layer 5, most of the o-chlorobenzaldehyde in the wastewater can be adsorbed. By arranging multiple layers of material leveling plates 4 and adsorption resin layers 5, it can be fully adsorbed. At this time, open the valve 16 on the waste discharge pipe 7 and close the valve 16 on the recovery pipe 8. The waste discharge pipe 7 is connected to the sewage main pipe, and the wastewater after adsorption enters the sewage main pipe. Then close the valve 16 on the feed pipe 2, open the valve 16 on the supply pipe 13 and the raw material pump 14, and the methanol solution in the raw material tank 9 enters the feed pipe 2 and the spraying tray 3 through the supply pipe 13. Then the methanol solution desorbs the o-chlorobenzaldehyde on the adsorption resin layer 5. At this time, open the valve 16 on the recovery pipe 8 and close the valve 16 on the waste discharge pipe 7, so that the desorption liquid enters the distillation tank 10. Then start the distillation tank 10 to run, distill out the methanol solution therein and enter the condenser 11, start the condenser 11 to run to condense the methanol, and make the condensed methanol enter the raw material tank 9 for reuse. The remaining o-chlorobenzaldehyde solution in the distillation tank 10 is discharged from the collection pipe 12 for subsequent treatment.
Claims
1. A wastewater treatment system for o-chlorobenzaldehyde production, comprising an adsorption tank (1), wherein the upper end of the adsorption tank (1) is connected to a feed pipe (2) and the lower end is connected to a discharge pipe, characterized in that: It also includes a raw material tank (9), the raw material tank (9) is connected to a raw material pump (14), the input end of the raw material pump (14) is connected to a pipeline extending into the interior of the raw material tank (9), and the output end is connected to a feed pipe (13) connected to the feed pipe (2), the feed pipe (2) extends into the adsorption tank (1) and is fixedly connected to a spray plate (3), the adsorption tank (1) is located below the spray plate (3) and is fixedly connected to at least one material leveling plate (4), the lower part of the material leveling plate (4) is filled with an adsorption resin layer (5), the discharge pipe is connected to a waste pipe (7) and a recovery pipe (8) through a tee (6), the recovery pipe (8) is connected to a distillation tank (10), the upper end of the distillation tank (10) is connected to a condenser (11) through a pipeline, and the discharge port of the condenser (11) is connected to the upper end of the raw material tank (9) through a pipeline.
2. The wastewater treatment system for o-chlorobenzaldehyde production according to claim 1, characterized in that: The material spraying plate (3) is in the shape of a bamboo hat, and a plurality of material discharge holes are provided on the inner wall of the material spraying plate (3).
3. The wastewater treatment system for o-chlorobenzaldehyde production according to claim 2, characterized in that: The material leveling plate (4) is in the shape of a bamboo hat, and is provided with a plurality of through holes. The upper portion of the material leveling plate (4) at the uppermost end extends into the interior of the material spraying plate (3).
4. The wastewater treatment system for o-chlorobenzaldehyde production according to claim 1, characterized in that: The feed pipe (2) is connected to a booster pump (15).
5. The wastewater treatment system for o-chlorobenzaldehyde production according to claim 1, characterized in that: The bottom of the distillation tank (10) is connected to a collecting pipe (12).
6. The wastewater treatment system for o-chlorobenzaldehyde production according to claim 5, characterized in that: The feed pipe (2), the waste discharge pipe (7), the recovery pipe (8), the collection pipe (12) and the supply pipe (13) are all fixedly connected with valves (16).