A graded heat exchange device for phenylhydrazine wastewater treatment and resource utilization

Abstract

The utility model discloses a kind of phenylhydrazine wastewater treatment resource use grading heat exchange devices, it is related to wastewater treatment technical field, including outlet and filtering recovery mechanism, the one end of the outlet is fixedly connected with filtering recovery mechanism, and filtering recovery mechanism includes recovery tank fixedly connected in the outlet one end position, the inside fixedly connected with glass fibre composite layer of the recovery tank, and the inside of recovery tank is provided with polytetrafluoroethylene layer, the inside of the recovery tank is provided with resin adsorption filter core, and the top of resin adsorption filter core is provided with impurity filter screen, and recovery tank is outer layer carrier. The phenylhydrazine wastewater treatment resource use grading heat exchange device, compared with existing ordinary wastewater heat exchange device, enhances the impact resistance of box, corrosion resistance, realizes double separation, makes wastewater in standard discharge convenient recycling, and improves heat conduction efficiency, forms waste heat recovery closed loop, improves energy efficiency and resource utilization rate, and supports device management efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically a staged heat exchange device for the resource utilization of phenylhydrazine wastewater. Background Technology

[0002] Wastewater treatment technology is a technical system that removes pollutants (such as organic matter, heavy metals, and suspended solids) from wastewater through physical, chemical, and biological means to achieve water purification or resource recovery. It covers processes such as sedimentation, filtration, oxidation-reduction, biodegradation, and membrane separation, and is widely used in industrial and municipal fields. Its core objective is to reduce water pollution and protect water resources. Some technologies can also realize the resource utilization of wastewater, meeting the dual needs of environmental protection and energy conservation. The staged heat exchange device for the resource utilization of phenylhydrazine wastewater is a special treatment and resource recovery device designed for phenylhydrazine production wastewater. However, the existing staged heat exchange devices have certain defects.

[0003] For example, application number CN202321567260.8 discloses a wastewater heat exchange device, relating to the field of wastewater treatment technology. This application includes: a first pipeline for steam passage and a heat exchange box and a water storage tank configured on the first pipeline; a second pipeline through the heat exchange box and a water-cooled condenser configured on the second pipeline, the second pipeline being for wastewater passage; a third pipeline through the water-cooled condenser and the water storage tank in a closed loop, and a compressor configured on the third pipeline. This application, with the cooperation of the compressor and condenser, can achieve reverse heat conduction, allowing wastewater and steam to exchange heat once in the heat exchange box, and then exchange heat again between the wastewater and condensate, further extracting heat from the condensate to improve the overall heat exchange effect, thereby utilizing the heat from the steam to fully preheat the wastewater. However, this wastewater heat exchange device's casing is easily deformed by wastewater impact, is not resistant to phenylhydrazine corrosion and has a short lifespan, has incomplete wastewater filtration, low purification efficiency, high heat loss, insufficient waste heat recovery and utilization, and low energy efficiency.

[0004] Therefore, in view of this, we have studied and improved the existing structure to address its shortcomings, and proposed a staged heat exchange device for the resource utilization of phenylhydrazine wastewater. Utility Model Content

[0005] The purpose of this invention is to provide a staged heat exchange device for the treatment and resource utilization of phenylhydrazine wastewater, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a graded heat exchange device for the resource utilization of phenylhydrazine wastewater treatment, comprising an outlet and a filtration and recovery mechanism. The filtration and recovery mechanism is fixedly connected to one end of the outlet, and the filtration and recovery mechanism includes a recovery box fixedly connected to one end of the outlet. A glass fiber composite layer is fixedly connected inside the recovery box, and a polytetrafluoroethylene layer is provided inside the recovery box. A resin adsorption filter element is provided inside the recovery box, and an impurity filter screen is provided on the top of the resin adsorption filter element.

[0007] Preferably, a second heat exchanger is fixedly connected to one end of the outlet, and a heat recovery mechanism is fixedly connected to the outer surface of the second heat exchanger.

[0008] Preferably, the heat recovery mechanism includes a heat-conducting material fixedly connected to the outer surface of the second heat exchanger, and a heat exchange tube is fixedly connected to the outer surface of the heat-conducting material, with a waste heat collection box fixedly connected to one end of the heat exchange tube.

[0009] Preferably, one end of the second heat exchanger is fixedly connected to a conveying pipe, and a control valve is provided on the outer surface of the conveying pipe.

[0010] Preferably, the outer surface of the second heat exchanger is provided with a base, and one end of the delivery pipe is fixedly connected to the first heat exchanger.

[0011] Preferably, a water inlet is fixedly connected to one side of the first heat exchanger, and a support frame is fixedly connected to the outer surface of the first heat exchanger.

[0012] Preferably, a shock-absorbing pad is fixedly connected to the bottom of the support frame, and a water outlet is fixedly connected to the outer surface of the recycling box.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model enhances the impact resistance of the housing by setting up a filtration and recovery mechanism, enabling it to withstand the impact pressure when wastewater enters and preventing housing deformation from affecting the filtration process. The inner polytetrafluoroethylene layer is resistant to the strong corrosiveness of phenylhydrazine wastewater, isolating the wastewater from contact with the metal of the housing and extending the service life of the housing. The wastewater passes through the top impurity filter screen and resin adsorption filter element, achieving an adsorption rate of over 90% for pollutants such as phenylhydrazine, realizing dual separation of solids and liquids and soluble pollutants. This gradient filtration design improves the wastewater purification efficiency, reducing the COD value of the treated wastewater to below the discharge standard. It can directly meet the discharge standards, reducing environmental pressure, and can also be reused in production water replenishment and other processes, improving water resource utilization and providing key support for the overall resource-based treatment efficiency of the device. 2. This utility model significantly improves the energy efficiency and resource utilization rate of wastewater treatment by setting up a heat recovery mechanism. The heat-conducting material not only quickly conducts the high-temperature waste heat generated during the pretreatment of phenylhydrazine wastewater, but its flexible properties can also adapt to the spiral winding shape of the heat exchange tube, avoiding heat loss caused by the contact gaps of traditional rigid heat-conducting components, improving heat conduction efficiency, and forming a closed loop of rapid waste heat conduction, efficient heat exchange and stable storage. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the structure of the first heat exchanger 8 and the second heat exchanger 3 of this utility model; Figure 3 This is a schematic diagram of the structure of the filtration and recovery mechanism 2 of this utility model; Figure 4 This is a schematic diagram of the heat recovery mechanism 4 of this utility model.

[0015] In the diagram: 1. Outlet; 2. Fiber filtration and recovery mechanism; 201. Recovery box; 202. Fiberglass composite layer; 203. Polytetrafluoroethylene layer; 204. Resin adsorption filter element; 205. Impurity filter screen; 3. Second heat exchanger; 4. Heat recovery mechanism; 401. Heat-conducting material; 402. Heat exchange tube; 403. Waste heat collection box; 5. Delivery pipe; 6. Control valve; 7. Base; 8. First heat exchanger; 9. Inlet; 10. Support frame; 11. Shock-absorbing pad; 12. Outlet. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figures 1-3As shown, a staged heat exchange device for the treatment and resource utilization of phenylhydrazine wastewater includes an outlet 1 and a filtration and recovery mechanism 2. The filtration and recovery mechanism 2 is fixedly connected to one end of the outlet 1, and the filtration and recovery mechanism 2 includes a recovery box 201 fixedly connected to one end of the outlet 1. A glass fiber composite layer 202 is fixedly connected inside the recovery box 201, and a polytetrafluoroethylene layer 203 is provided inside the recovery box 201. A resin adsorption filter element 204 is provided inside the recovery box 201, and an impurity filter screen 205 is provided on the top of the resin adsorption filter element 204. The recovery box 201 is the outer carrier, and the glass fiber composite layer 202 inside enhances the impact resistance of the box body to avoid deformation caused by wastewater impact. The inner polytetrafluoroethylene layer 203 is resistant to acid and alkali corrosion and isolates the box body from the erosion of wastewater. The wastewater first passes through the top impurity filter screen 205 to intercept large particles of impurities, and then passes through the resin adsorption filter element 204 to adsorb soluble pollutants in the water, realizing the dual separation of solid and liquid and pollutants, laying the foundation for subsequent reuse or discharge of wastewater.

[0018] like Figure 4 As shown, a second heat exchanger 3 is fixedly connected to one end of outlet 1, and a heat recovery mechanism 4 is fixedly connected to the outer surface of the second heat exchanger 3. The heat recovery mechanism 4 includes a heat-conducting material 401 fixedly connected to the outer surface of the second heat exchanger 3, and a heat exchange tube 402 is fixedly connected to the outer surface of the heat-conducting material 401. A waste heat collection box 403 is fixedly connected to one end of the heat exchange tube 402. The heat-conducting material 401 is tightly attached to the outer surface of the heat exchange tube 402, and heat is quickly introduced into the low-temperature fluid inside the tube. The heat exchange tube 402 is spirally wound to increase the heat exchange area and improve the heat exchange efficiency. Finally, the fluid heated by the heat exchange is transported to the waste heat collection box 403 for storage, providing a heat source for subsequent heating processes and reducing energy waste.

[0019] Furthermore, one end of the second heat exchanger 3 is fixedly connected to a conveying pipe 5, and a control valve 6 is provided on the outer surface of the conveying pipe 5. A base 7 is provided on the outer surface of the second heat exchanger 3, and one end of the conveying pipe 5 is fixedly connected to the first heat exchanger 8. The control valve 6 on the outer surface of the conveying pipe 5 is a pneumatic regulating valve, which can accurately control the flow rate of the medium and avoid sudden changes in flow rate from affecting the heat exchange efficiency. The base 7 on the outer surface of the second heat exchanger 3 is a welded steel structure with high load-bearing capacity, which prevents the equipment from shifting due to vibration during operation and ensures the sealing of the connection of the conveying pipe 5.

[0020] Furthermore, an inlet 9 is fixedly connected to one side of the first heat exchanger 8, and a support frame 10 is fixedly connected to the outer surface of the first heat exchanger 8. A shock-absorbing pad 11 is fixedly connected to the bottom of the support frame 10, and an outlet 12 is fixedly connected to the outer surface of the recovery box 201. The inlet 9 on one side of the first heat exchanger 8 is a corrosion-resistant interface that can introduce low-temperature fluid to be heated, and exchange heat with the medium transported by the conveying pipe 5 in the body of the device. The shock-absorbing pad 11 at the bottom of the support frame 10 can absorb the vibration of the equipment operation and avoid resonance affecting the heat exchange accuracy. The outlet 12 on the outer surface of the recovery box 201 is adapted to the filtered wastewater and accurately discharges the treated water, realizing the connection between heat exchange and wastewater recovery.

[0021] Working Principle: When using this staged heat exchanger for the treatment and resource utilization of phenylhydrazine wastewater, the second heat exchanger 3 is first placed in the designated position using the base 7 on its outer surface to ensure stability. The first heat exchanger 8 is then installed using the support frame 10 on its outer surface. The shock-absorbing pads 11 at the bottom of the support frame 10 can reduce vibrations during subsequent operation. The high-temperature phenylhydrazine wastewater after heat exchange is discharged from the outlet 1. During the heat exchange process, the heat-conducting material 401 of the heat recovery mechanism 4 on the outer surface of the second heat exchanger 3 is in close contact with the shell, transferring the heat from the wastewater to the heat exchange tube 402. The low-temperature fluid inside the heat exchange tube 402 absorbs the heat and is then transported to the waste heat collection box 403 for storage. In standby mode, phenylhydrazine wastewater enters the first heat exchanger 8 and the second heat exchanger 3 through inlet 9 for secondary heat exchange. The wastewater then enters the recovery tank 201 of the filtration and recovery mechanism 2. The impurity filter screen 205 inside the recovery tank 201 first traps large particles of impurities. Subsequently, the wastewater flows through the resin adsorption filter element 204, which adsorbs and removes soluble pollutants. The polytetrafluoroethylene layer 203 on the inner wall of the recovery tank 201 prevents the wastewater from corroding the tank body, while the outer glass fiber composite layer 202 enhances the strength of the tank body. The treated wastewater is finally discharged through the outlet 12 on the outer surface of the recovery tank 201. This is the working principle of the graded heat exchange device for the resource utilization of phenylhydrazine wastewater treatment.

Claims

1. A staged heat exchange device for the treatment and resource utilization of phenylhydrazine wastewater, comprising an outlet (1) and a filtration and recovery mechanism (2), characterized in that, One end of the outlet (1) is fixedly connected to a filter recovery mechanism (2), and the filter recovery mechanism (2) includes a recovery box (201) fixedly connected to one end of the outlet (1). A glass fiber composite layer (202) is fixedly connected inside the recovery box (201), and a polytetrafluoroethylene layer (203) is provided inside the recovery box (201). A resin adsorption filter element (204) is provided inside the recovery box (201), and an impurity filter screen (205) is provided on the top of the resin adsorption filter element (204).

2. The staged heat exchange device for the resource utilization of phenylhydrazine wastewater treatment according to claim 1, characterized in that, One end of the outlet (1) is fixedly connected to a second heat exchanger (3), and a heat recovery mechanism (4) is fixedly connected to the outer surface of the second heat exchanger (3).

3. The staged heat exchange device for the resource utilization of phenylhydrazine wastewater treatment according to claim 2, characterized in that, The heat recovery mechanism (4) includes a heat-conducting material (401) fixedly connected to the outer surface of the second heat exchanger (3), and a heat exchange tube (402) is fixedly connected to the outer surface of the heat-conducting material (401), and a waste heat collection box (403) is fixedly connected to one end of the heat exchange tube (402).

4. The staged heat exchange device for the resource utilization of phenylhydrazine wastewater treatment according to claim 2, characterized in that, One end of the second heat exchanger (3) is fixedly connected to a conveying pipe (5), and a control valve (6) is provided on the outer surface of the conveying pipe (5).

5. A staged heat exchange device for the resource utilization of phenylhydrazine wastewater treatment according to claim 2, characterized in that, The second heat exchanger (3) has a base (7) on its outer surface, and one end of the delivery pipe (5) is fixedly connected to the first heat exchanger (8).

6. The staged heat exchange device for the treatment and resource utilization of phenylhydrazine wastewater according to claim 5, characterized in that, A water inlet (9) is fixedly connected to one side of the first heat exchanger (8), and a support frame (10) is fixedly connected to the outer surface of the first heat exchanger (8).

7. A staged heat exchange device for the resource utilization of phenylhydrazine wastewater according to claim 6, characterized in that, The bottom of the support frame (10) is fixedly connected to a shock-absorbing pad (11), and the outer surface of the recycling box (201) is fixedly connected to a water outlet (12).

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