A kettle residual discharging treatment device for DMF wastewater recovery device

Abstract

The utility model relates to the technical field of cauldron residual discharging treatment, concretely relates to a cauldron residual discharging treatment device for DMF wastewater recovery device, including evaporating jar body, still including the sealed hopper of setting at the just below of evaporating jar body to the frequency conversion screw rod pump of being located below sealed hopper, the sealed hopper bottom is equipped with the material guiding pipe, the material guiding pipe bottom is connected with frequency conversion screw rod pump, the cauldron residual discharging treatment device for DMF wastewater recovery device, directly imports the sealed hopper and stores up to the cauldron residual, and handles the toxic gas that it produces in the sealed hopper, eliminates the risk of flash explosion, poisoning from the source, utilizes radar material level detector control material height in processing cavity, and keeps gas diffusion space, adopts the waste heat recovery structure to the cauldron residual of entering sealed hopper and carries out the cooling treatment, reduces the production of toxic, harmful gas in the process of cauldron residual conveying, improves the stability of chemical property in the subsequent treatment process of cauldron residual.

Description

Technical Field

[0001] This utility model relates to the field of reactor residue discharge treatment technology, specifically to a reactor residue discharge treatment device for DMF wastewater recovery equipment. Background Technology

[0002] Reactor residues typically refer to the heavy oil components and solid residues remaining inside equipment such as reaction vessels, distillation vessels, and crystallization vessels during the production processes of chemicals, pharmaceuticals, etc., after processes such as reaction, distillation, evaporation, and crystallization.

[0003] The production of synthetic leather generates wastewater with a high concentration of DMF, which requires centralized recovery equipment for treatment. However, during the treatment of this wastewater in the centralized recovery equipment, a high-concentration distillation residue containing a large amount of residue and more than 50% DMF is generated. This residue needs to be sent to an evaporator, where it is heated to 140°C under a stirring environment using steam to continue evaporation and recovery of DMF, water, and the concentrated high-concentration solid-liquid mixture residue.

[0004] The existing process for discharging concentrated high-concentration solid-liquid mixture residue requires manual remote control valve operation by staff to directly discharge the residue into temporary iron drums for storage. After the residue in the iron drums naturally cools to room temperature, the entire drum is then packaged and transported to a solid waste incineration unit for incineration.

[0005] However, during discharge, the evaporator is disconnected from the production system by closing the feed valve. Due to the weight of the residue itself and the steam pressure inside the tank, the residue is prone to splashing during discharge, which can easily burn operators. Furthermore, the splashed residue is extremely difficult to clean up after it cools on the ground, making environmental remediation work very challenging. At the same time, during the high-temperature discharge of the residue, some DMF continues to decompose under heat. Therefore, during the filling and cooling process, the residue will generate a large amount of harmful gases such as CO, methylamine, and dimethylamine, polluting the operating environment. Moreover, the iron drums used to hold the residue cannot be recycled, which not only increases production costs but also wastes iron drum resources. Utility Model Content

[0006] To address the aforementioned issues, a reactor residue discharge treatment device for DMF wastewater recovery is provided. This device directly introduces the reactor residue into a sealed hopper for buffering, and treats any toxic gases generated within the hopper, eliminating the risk of flash explosions and poisoning at the source. A radar level detector controls the material height within the treatment chamber, preserving space for gas diffusion. A waste heat recovery structure is employed to cool the reactor residue entering the sealed hopper, reducing the generation of toxic and harmful gases during transport and improving the chemical stability of the residue during subsequent treatment.

[0007] To address the existing technical problems, this utility model provides a residue discharge treatment device for DMF wastewater recovery equipment, including an evaporator body, a sealed hopper located directly below the evaporator body, and a variable frequency screw pump located below the sealed hopper. A guide pipe is installed at the bottom of the sealed hopper, and the bottom of the guide pipe is connected to the variable frequency screw pump. A discharge pipe is connected to the bottom of the evaporator body, and a support frame is provided on the outside of the evaporator body. The sealed hopper is connected to a vent pipe and an exhaust pipe on its outer side, which communicate with its internal processing chamber. The vent pipe is located on the side of the sealed hopper, and the exhaust pipe is located above the sealed hopper. A radar level detector and a feed pipe are also installed above the sealed hopper, and the bottom of the radar level detector extends downwards into the processing chamber. A waste heat recovery structure is provided between the evaporator body and the sealed hopper.

[0008] Preferably, the waste heat recovery structure includes a downwardly inclined conveying pipe and a sleeve cooling assembly disposed outside the conveying pipe, wherein the two ends of the conveying pipe are respectively connected to a discharge pipe and a feed pipe.

[0009] Preferably, the sleeve cooling assembly includes a sleeve with a cooling chamber formed inside, and the sleeve is fixedly installed above the sealed hopper.

[0010] Preferably, the end and top of the sleeve are respectively connected to an inlet pipe and an outlet pipe that communicate with the cooling chamber, the inlet pipe being located at the bottom of the cooling chamber and the outlet pipe being located at the top of the cooling chamber.

[0011] Preferably, two sets of baffles are provided on the inner wall of the cooling chamber along its extension direction. Each baffle is provided with a slot that matches the material conveying pipe and is vertically arranged inside the sleeve.

[0012] Preferably, the two sets of baffles are oriented in opposite directions and each baffle is arranged in a "D" shape, and the diameter of the baffle is the same as the diameter of the cooling cavity.

[0013] Preferably, solenoid valves are installed at the discharge pipe, guide pipe, vent pipe and exhaust pipe.

[0014] Preferably, the variable frequency screw pump is also equipped with multiple sets of heat dissipation fins arranged in a ring array.

[0015] The advantages of this utility model compared to the prior art are: 1. The reactor residue is directly fed into a closed hopper for buffering, and the toxic gases generated are treated in the closed hopper to avoid environmental pollution caused by reactor residue splashing, thus eliminating the risk of flash explosion and poisoning at the source.

[0016] 2. The material height in the processing chamber is controlled by a radar level detector, which preserves the space for gas diffusion, so that the gas carried by the residue can be smoothly released in the closed hopper.

[0017] 3. A waste heat recovery structure is adopted to cool down the reactor residue entering the sealed hopper, which reduces the amount of DMF inside the reactor residue from continuously decomposing at high temperatures during the transportation process and producing toxic and harmful gases such as carbon monoxide, dimethylamine, formic acid, and nitrogen oxides, thereby improving the chemical stability of the reactor residue in subsequent processing. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a reactor residue discharge treatment device for a DMF wastewater recovery system.

[0019] Figure 2 This is a top-view three-dimensional structural diagram of the sealed hopper of a residue discharge treatment device for DMF wastewater recovery.

[0020] Figure 3 This is a bottom-view three-dimensional structural diagram of the sealing hopper of a DMF wastewater recovery device for treating wastewater residue discharge.

[0021] Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the casing of a reactor residue discharge treatment device for DMF wastewater recovery.

[0022] Figure 5 This is a side view cross-sectional diagram of the casing of a reactor residue discharge treatment device for DMF wastewater recovery.

[0023] Figure 6 This is a schematic diagram of the conveying pipeline and three-dimensional structure of a reactor residue discharge treatment device for DMF wastewater recovery.

[0024] The following are the labels in the diagram: 1. Evaporator body; 2. Sealed hopper; 2a. Vent pipe; 2b. Exhaust pipe; 2c. Radar level detector; 2d. Feed pipe; 3. Variable frequency screw pump; 3a. Heat dissipation fins; 4. Waste heat recovery structure; 4a. Material conveying pipeline; 4b. Shell cooling assembly; 4b1. Shell cylinder; 4b2. Baffle plate. Detailed Implementation

[0025] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0026] See Figure 1-3As shown, a residue discharge treatment device for DMF wastewater recovery includes an evaporator body 1, a sealed hopper 2 located directly below the evaporator body 1, and a variable frequency screw pump 3 located below the sealed hopper 2. The bottom of the sealed hopper 2 is equipped with a guide pipe, the bottom of which is connected to the variable frequency screw pump 3. The bottom of the evaporator body 1 is connected to a discharge pipe, and a support frame is provided on the outside of the evaporator body 1.

[0027] It should be noted that after the evaporator body 1 completes the treatment of DMF wastewater, the remaining residue inside is introduced into the sealed hopper 2 through the discharge pipe for settling, waiting for it to cool down, and the gas generated during the cooling process is treated and collected. Finally, the cooled residue is guided to the variable frequency screw pump 3 through the guide pipe. The on-site operator manually operates the variable frequency screw pump 3 to slowly extract the residue from the sealed hopper 2, discharge it into the bagging mold, and package and store it in a woven bag with a plastic inner film.

[0028] See Figure 2 As shown, the outer side of the sealed hopper 2 is connected to a vent pipe 2a and an exhaust pipe 2b that communicate with its internal processing chamber. The vent pipe 2a is located on the side of the sealed hopper 2, and the exhaust pipe 2b is located above the sealed hopper 2.

[0029] It should be noted that the vent pipe 2a is used to supply nitrogen gas to the processing chamber of the sealed hopper 2 to react with the gas inside. During the reaction between the nitrogen gas and the gas inside the processing chamber, the operator can take samples from the exhaust pipe 2b to detect the concentration of toxic and harmful gases in the processing chamber. Once the gas concentration has decreased to a qualified value, the gas inside the sealed hopper 2 can be vented out through the exhaust pipe 2b.

[0030] See Figure 2 As shown, a radar level detector 2c and a feed pipe 2d are also installed above the sealed hopper 2, and the bottom of the radar level detector 2c extends downward to the processing chamber.

[0031] During the gas processing, the radar level detector 2c controls the material height in the processing chamber, preserving space for gas diffusion so that the gas carried by the residue can be smoothly released in the sealed hopper 2.

[0032] See Figure 2-4 As shown, a waste heat recovery structure 4 is provided between the evaporator body 1 and the sealed hopper 2.

[0033] The waste heat recovery structure 4 includes a downwardly inclined conveying pipe 4a and a sleeve cooling assembly 4b disposed outside the conveying pipe 4a. The two ends of the conveying pipe 4a are respectively connected to the discharge pipe and the feed pipe 2d.

[0034] The sleeve cooling assembly 4b includes a sleeve cylinder 4b1, a cooling chamber is formed inside the sleeve cylinder 4b1, and the sleeve cylinder 4b1 is fixedly installed above the sealed hopper 2.

[0035] It should be noted that, due to the high chemical stability of DMF at low temperatures, the waste heat recovery structure 4 is used to cool the reactor residue, so that during the discharge, packaging and storage process, the small amount of DMF contained in the reactor residue will no longer decompose at high temperatures to produce toxic and harmful gases such as carbon monoxide, dimethylamine, formic acid and nitrogen oxides.

[0036] The downward inclination of the conveying pipe 4a allows the residue in the reactor to flow smoothly under the action of gravity, preventing blockage within the conveying pipe 4a.

[0037] See Figure 4-6 As shown, the end and top of the sleeve 4b1 are respectively connected to an inlet pipe and an outlet pipe that communicate with the cooling chamber. The inlet pipe is located at the bottom of the cooling chamber, and the outlet pipe is located at the top of the cooling chamber.

[0038] Two sets of baffles 4b2 are provided on the inner wall of the cooling chamber along its extension direction. Each baffle 4b2 has a slot that matches the material conveying pipe 4a and is vertically arranged inside the sleeve 4b1.

[0039] It should be noted that the refrigerant can be introduced into the cooling chamber through the inlet pipe. Within the sleeve 4b1, the refrigerant flows back through the gaps in the baffles 4b2, passing over the surface of the reactor residue conveying pipe 4a, thus improving heat exchange efficiency. Furthermore, the discharge temperature of the reactor residue can be adjusted by controlling the flow rate of the refrigerant entering the sleeve and the speed at which the reactor residue enters the hopper using external equipment. After heat exchange, the refrigerant temperature rises and can be transported to the raw material preheating system through the drain pipe for heat recovery.

[0040] See Figure 5 and Figure 6 As shown, the two sets of baffles 4b2 are oriented in opposite directions and each baffle 4b2 is arranged in a "D" shape. The diameter of the baffle 4b2 is the same as the diameter of the cooling cavity.

[0041] See Figure 1-3 As shown, solenoid valves are installed at the discharge pipe, guide pipe, vent pipe 2a and exhaust pipe 2b.

[0042] It should be noted that the solenoid valve allows for better control of the discharge of residue from the reactor, the introduction and discharge of gas, and the reduction of manual operation, thereby reducing manual labor and minimizing the operator's contact with the residue.

[0043] See Figure 1-3 As shown, the variable frequency screw pump 3 is also equipped with multiple sets of heat dissipation fins 3a arranged in a ring array.

[0044] It should be noted that the heat dissipation fins 3a can further dissipate the remaining heat of the reactor residue to the outside, reduce the temperature of the reactor residue, and further improve the stability of the chemical properties during the packaging process.

[0045] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A residue discharge treatment device for DMF wastewater recovery equipment, comprising an evaporator body (1), characterized in that, It also includes a sealed hopper (2) located directly below the evaporator body (1), and a variable frequency screw pump (3) located below the sealed hopper (2). The bottom of the sealed hopper (2) is equipped with a guide pipe, the bottom of which is connected to the variable frequency screw pump (3). The bottom of the evaporator body (1) is connected to a discharge pipe, and a support frame is provided on the outside of the evaporator body (1). The outer side of the sealed hopper (2) is connected to a vent pipe (2a) and an exhaust pipe (2b) that communicate with its internal processing chamber. The vent pipe (2a) is located on the side of the sealed hopper (2), and the exhaust pipe (2b) is located above the sealed hopper (2). A radar level detector (2c) and a feed pipe (2d) are also installed above the sealed hopper (2), and the bottom of the radar level detector (2c) extends downward to the processing chamber; A waste heat recovery structure (4) is provided between the evaporator body (1) and the sealed hopper (2).

2. The residue discharge treatment device for a DMF wastewater recovery device according to claim 1, characterized in that, The waste heat recovery structure (4) includes a downwardly inclined conveying pipe (4a) and a sleeve cooling assembly (4b) disposed outside the conveying pipe (4a). The two ends of the conveying pipe (4a) are respectively connected to the discharge pipe and the feed pipe (2d).

3. The residue discharge treatment device for a DMF wastewater recovery device according to claim 2, characterized in that, The sleeve cooling assembly (4b) includes a sleeve (4b1) with a cooling chamber formed inside the sleeve (4b1), and the sleeve (4b1) is fixedly installed above the sealed hopper (2).

4. The residue discharge treatment device for a DMF wastewater recovery device according to claim 3, characterized in that, The end and top of the sleeve (4b1) are respectively connected to an inlet pipe and an outlet pipe that communicate with the cooling chamber. The inlet pipe is located at the bottom of the cooling chamber, and the outlet pipe is located at the top of the cooling chamber.

5. The residue discharge treatment device for a DMF wastewater recovery device according to claim 4, characterized in that, Two sets of baffles (4b2) are provided on the inner wall of the cooling chamber along its extension direction. Each baffle (4b2) has a slot that matches the material conveying pipe (4a) and is vertically arranged inside the sleeve (4b1).

6. The residue discharge treatment device for a DMF wastewater recovery device according to claim 5, characterized in that, The two sets of baffles (4b2) are oriented in opposite directions and each baffle (4b2) is arranged in a "D" shape. The diameter of the baffle (4b2) is the same as the diameter of the cooling cavity.

7. The residue discharge treatment device for a DMF wastewater recovery device according to claim 1, characterized in that, Solenoid valves are installed at the discharge pipe, guide pipe, vent pipe (2a) and exhaust pipe (2b).

8. The residue discharge treatment device for a DMF wastewater recovery device according to claim 1, characterized in that, The variable frequency screw pump (3) is also equipped with multiple sets of heat dissipation fins (3a) arranged in a ring array.

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