Methylamine wastewater treatment device

Abstract

The utility model discloses a methylamine wastewater treatment device which comprises a wastewater storage tank used for storing methylamine wastewater to be treated, a water inlet is formed in the top of the wastewater storage tank, a water outlet is formed in the bottom of the wastewater storage tank, the water outlet is connected with a preheater through a pipeline, and the other end of the preheater is connected with a rectifying tower through a liquid pump. A second water outlet is formed in the bottom of the rectifying tower and connected with a reboiler, the other end of the reboiler is connected to the rectifying tower through a pipeline, a steam outlet in the upper end of the rectifying tower is connected with a condenser, and a condensate outlet in the bottom of the condenser is connected with a collecting tank. Compared with the prior art, the device has the advantages that the preheater is arranged before wastewater enters the rectifying tower, and the wastewater is preheated by the electric heating plate, so that the rectifying energy consumption is reduced, and the overall treatment efficiency is improved. Overflow weirs and sieve pores are arranged on multiple layers of tower plates in the rectifying tower, so that the height of a liquid layer can be effectively controlled, sufficient mass and heat transfer between steam and liquid is promoted, and the methylamine separation effect is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater treatment devices, specifically to a methylamine wastewater treatment device. Background Technology

[0002] Methylamine wastewater, a common type of organic wastewater in industrial production, contains a large amount of methylamine substances. This type of wastewater is not only highly toxic and would cause serious environmental pollution if discharged directly, but also difficult to treat due to its complex composition.

[0003] Traditional methylamine wastewater treatment equipment often employs single or simple combinations of treatment processes. Common methods include simple chemical neutralization, biological treatment, and simple distillation. Chemical neutralization can only adjust the pH value of the wastewater and cannot effectively remove methylamine pollutants; biological treatment has high requirements for water quality and a long treatment cycle; simple distillation can separate some substances, but its efficiency is low. The most significant technical deficiency of traditional methylamine wastewater treatment equipment lies in the lack of systematic optimization and integration of the wastewater treatment process, making it difficult to guarantee the stability and efficiency of the treatment effect. Utility Model Content

[0004] (I) Technical Issues

[0005] This invention provides a methylamine wastewater treatment device that integrates preheating, distillation, condensation, and pH adjustment functions, achieving efficient and low-consumption methylamine wastewater treatment.

[0006] (II) Technical Content

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a methylamine wastewater treatment device, comprising a wastewater storage tank for storing methylamine wastewater to be treated, wherein the wastewater storage tank is provided with an inlet at the top and an outlet at the bottom, the outlet is connected to a preheater via a pipe, the other end of the preheater is connected to a distillation column via a liquid pump, the bottom of the distillation column is provided with a second outlet, the second outlet is connected to a reboiler, the other end of the reboiler is connected back to the distillation column via a pipe, the upper steam outlet of the distillation column is connected to a condenser, and the condensate outlet at the bottom of the condenser is connected to a collection tank.

[0008] Furthermore, it also includes a pH adjustment tank, which is equipped with a dosing mechanism at its upper end. The pH adjustment tank is connected to the inlet of the wastewater storage tank via a liquid pump.

[0009] Furthermore, the dosing mechanism includes a medicine tank fixedly installed at the upper end of the pH adjustment tank, and a metering pump is provided at the bottom outlet of the medicine tank.

[0010] Furthermore, the distillation column is provided with multiple layers of trays, each of which is provided with an overflow weir for controlling the liquid level on the tray and a sieve for allowing steam to pass through and transfer mass and heat with the liquid on the tray.

[0011] Furthermore, a liquid level sensor is installed inside the collection tank.

[0012] Furthermore, both the wastewater storage tank and the distillation tower have an insulation layer on their outer walls.

[0013] Furthermore, the preheater is equipped with an electric heating plate for preheating wastewater.

[0014] (III) Technical Effects

[0015] Compared with existing technologies, this invention has the following advantages: By installing a preheater before the wastewater enters the distillation column and using electric heating plates to preheat the wastewater, distillation energy consumption is reduced, overall treatment efficiency is improved, and energy waste is reduced. The multi-layered trays inside the distillation column are equipped with overflow weirs and sieves, which effectively control the liquid level, promote sufficient mass and heat transfer between steam and liquid, improve methylamine separation, and enhance treatment quality. The condenser condenses the steam generated in the distillation column, and the condensate is collected in a collection tank. Combined with a liquid level sensor, the collection status can be monitored in real time, achieving precise collection and control. The pH adjustment tank and dosing mechanism can precisely add reagents through metering pumps according to the wastewater quality to adjust the pH value of the wastewater, providing stable water quality conditions for subsequent treatment. The insulation layer on the wastewater storage tank and the outer wall of the distillation column reduces heat loss during treatment, further reducing energy consumption and improving energy utilization. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a methylamine wastewater treatment device according to the present invention. Figure 1 .

[0017] Figure 2 This is a three-dimensional structural diagram of a methylamine wastewater treatment device according to the present invention. Figure 2 .

[0018] Figure 3 This is a schematic diagram of the main structure of a methylamine wastewater treatment device according to this utility model.

[0019] Figure 4 This is a top view schematic diagram of a methylamine wastewater treatment device according to the present invention.

[0020] As shown in the figure: 1. Wastewater storage tank; 2. Inlet; 3. Outlet; 4. Preheater; 5. Distillation column; 6. Second outlet; 7. Reboiler; 8. Condenser; 9. Collection tank; 10. pH adjustment tank; 11. Liquid pump; 12. Liquid pump II; 13. Liquid level sensor; 14. Dosing mechanism; 15. Insulation layer. Detailed Implementation

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The present invention will now be described in further detail with reference to the accompanying drawings.

[0024] Combined with appendix Figure 1 To be continued Figure 4 A methylamine wastewater treatment device includes a wastewater storage tank 1 for storing methylamine wastewater to be treated. The wastewater storage tank 1 has an inlet 2 at the top and an outlet 3 at the bottom. The outlet 3 is connected to a preheater 4 via a pipe. The preheater 4 has an electric heating plate inside for preheating the wastewater. The other end of the preheater 4 is connected to a distillation column 5 via a liquid pump 11. The bottom of the distillation column 5 has a second outlet 6. The second outlet 6 is connected to a reboiler 7. The other end of the reboiler 7 is connected back to the distillation column 5 via a pipe. The upper steam outlet of the distillation column 5 is connected to a condenser 8. The condensate outlet at the bottom of the condenser 8 is connected to a collection tank 9. The collection tank 9 has a liquid level sensor 13. The device also includes a pH adjustment tank 10. The upper end of the pH adjustment tank 10 has a dosing mechanism 14. The pH adjustment tank 10 is connected to the inlet 2 of the wastewater storage tank 1 via a liquid pump 12.

[0025] In this embodiment, as a preferred technical solution, the dosing mechanism 14 includes a medicine tank fixedly installed at the upper end of the pH adjustment tank 10, and a metering pump is provided at the bottom outlet of the medicine tank. Both the wastewater storage tank 1 and the distillation column 5 have an insulation layer 15 on their outer walls.

[0026] In this embodiment, as a preferred technical solution, the distillation column 5 is provided with multiple layers of trays. Each layer of tray is provided with an overflow weir for controlling the liquid level on the tray and a sieve for allowing steam to pass through and transfer mass and heat with the liquid on the tray. Multiple layers of trays are existing technology and are often found inside distillation columns. For technical details, please refer to the Chinese authorized patent for a distillation column for producing m-chlorophenylacetone (CN202221190782.6).

[0027] The working principle of this utility model of a methylamine wastewater treatment device is as follows: This device uses preheating to increase the temperature of the wastewater and reduce the energy consumption of distillation. Based on the gas-liquid mass and heat transfer on the trays in the distillation column, it achieves the separation of substances such as methylamine. The vapor is converted into liquid by condensation for easy collection. The wastewater treatment conditions are improved by pH adjustment.

[0028] The working process of the methylamine wastewater treatment device of this utility model is as follows:

[0029] 1. Wastewater Storage and pH Adjustment: Wastewater first flows into pH adjustment tank 10. The metering pump at the bottom of the chemical tank of the dosing mechanism 14 precisely adds chemicals to pH adjustment tank 10 based on wastewater quality test data, adjusting the wastewater pH to a suitable range for subsequent treatment. The adjusted wastewater is then pumped from pH adjustment tank 10 to wastewater storage tank 1 via liquid pump 2 12. Methylamine wastewater awaiting treatment flows into wastewater storage tank 1 from inlet 2 for temporary storage. The insulation layer 15 on the outer wall of wastewater storage tank 1 reduces heat loss and maintains a stable wastewater temperature.

[0030] 2. Wastewater preheating: Wastewater is transported to preheater 4 through pipeline from the bottom outlet 3 of wastewater storage tank 1. The electric heating plate inside preheater 4 operates to preheat the wastewater, increase its temperature, and reduce energy consumption in the subsequent distillation process.

[0031] 3. Distillation Separation: Preheated wastewater is pumped to distillation column 5 by liquid pump 11. Overflow weirs on the multi-layered trays inside distillation column 5 maintain a suitable liquid level on each tray, while sieves allow vapor to pass through the liquid layer. During the mass and heat transfer process between the rising vapor and the liquid on the trays, volatile substances such as methylamine continuously transfer from the liquid phase to the gas phase, while less volatile impurities remain in the liquid phase. The second outlet 6 at the bottom of distillation column 5 sends the residual liquid to reboiler 7. Reboiler 7 heats the liquid, and the generated vapor is returned to distillation column 5 via pipeline, providing rising vapor for the distillation process and maintaining continuous distillation operation.

[0032] 4. Condensation and Collection: The steam discharged from the upper steam outlet of distillation column 5 enters condenser 8. Condenser 8 condenses the steam into liquid, and the condensate flows into collection tank 9 from the bottom condensate outlet. The liquid level sensor 13 in collection tank 9 monitors the liquid level in real time, allowing staff to monitor the collection status and process the collected products promptly.

[0033] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A methylamine wastewater treatment device, comprising a wastewater storage tank (1) for storing methylamine wastewater to be treated, wherein the wastewater storage tank (1) is provided with an inlet (2) at the top and an outlet (3) at the bottom, characterized in that: The outlet (3) is connected to a preheater (4) via a pipe. The other end of the preheater (4) is connected to a distillation column (5) via a liquid pump (11). The bottom of the distillation column (5) is provided with a second outlet (6). The second outlet (6) is connected to a reboiler (7). The other end of the reboiler (7) is connected back to the distillation column (5) via a pipe. The upper steam outlet of the distillation column (5) is connected to a condenser (8). The condensate outlet at the bottom of the condenser (8) is connected to a collection tank (9).

2. The methylamine wastewater treatment device according to claim 1, characterized in that: It also includes a pH adjustment tank (10), which is equipped with a dosing mechanism (14) at the upper end. The pH adjustment tank (10) is connected to the inlet (2) of the wastewater storage tank (1) through a liquid pump (12).

3. The methylamine wastewater treatment device according to claim 2, characterized in that: The dosing mechanism (14) includes a medicine tank fixed at the top of the pH adjustment tank (10), and a metering pump is provided at the bottom outlet of the medicine tank.

4. The methylamine wastewater treatment device according to claim 1, characterized in that: The distillation column (5) is equipped with multiple layers of trays. Each tray is provided with an overflow weir for controlling the liquid level on the tray and a sieve for allowing steam to pass through and transfer mass and heat with the liquid on the tray.

5. The methylamine wastewater treatment device according to claim 1, characterized in that: The collection tank (9) is equipped with a liquid level sensor (13).

6. The methylamine wastewater treatment device according to claim 1, characterized in that: The wastewater storage tank (1) and the distillation tower (5) are both provided with a heat insulation layer (15) on their outer walls.

7. The methylamine wastewater treatment device according to claim 1, characterized in that: The preheater (4) is equipped with an electric heating plate for preheating wastewater.

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