A system for recovering resource substances from coal chemical wastewater

Abstract

This utility model belongs to the field of coal chemical wastewater pretreatment technology, and discloses a resource substance recovery system for coal chemical wastewater, including an adsorption separation system, an adsorption material regeneration system, and a recovery and regeneration system. The adsorption separation system is used to adsorb and separate resource substances in the wastewater to be treated using adsorption materials. The resource substances in the wastewater to be treated include oils and phenols. The adsorption material regeneration system is used to regenerate the adsorption material using a regeneration solution. The recovery and regeneration system is used to regenerate the regeneration solution and separate and recover the adsorbed resource substances. This utility model achieves efficient separation of oils and phenols by filling the adsorption separation device with adsorption material. The adsorption material regeneration system provides a regeneration solution to the adsorption separation device to achieve elution and regeneration of the adsorption material, thereby realizing the recycling of the adsorption material and effectively reducing the recycling and treatment cost.

Description

Technical Field

[0001] This utility model belongs to the field of coal chemical wastewater pretreatment technology, and relates to the recovery of oil and phenol from coal chemical wastewater, and particularly to a system for recovering resource substances from coal chemical wastewater. Background Technology

[0002] Coal chemical wastewater is characterized by its large volume, complex water quality, and high content of resource substances, making it a typical type of industrial wastewater that is difficult to treat and recycle. Green recovery of resources such as oil and phenols from coal chemical wastewater can significantly reduce the operating costs of wastewater treatment and greatly improve the stability, adaptability, and effective degradation of biochemical treatment methods. It is also a necessary prerequisite for achieving harmless wastewater treatment. However, due to the high difficulty and cost of treating coal chemical wastewater, most wastewater treatment methods struggle to achieve green and low-carbon recovery of resource substances.

[0003] Currently, for the oil and phenolic resources mainly present in coal chemical wastewater, most technologies such as extraction and demulsification-flotation are used to separate and recover the oil and phenolic substances. However, the existing extraction and demulsification-flotation methods have problems such as high reagent consumption and high residue rate, high energy consumption, and the need to use multiple distillation processes, which makes it difficult to meet the water quality requirements of pretreated coal chemical wastewater. Utility Model Content

[0004] In view of the technical problems existing in the prior art, this utility model provides a resource material recovery system for coal chemical wastewater, so as to solve the technical problems of existing extraction methods and demulsification-air flotation methods, which have high reagent consumption, high residue rate, and high energy consumption, making it difficult to meet the water quality requirements of pretreated coal chemical wastewater.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a system for recovering resource substances in coal chemical wastewater, including an adsorption separation system, an adsorption material regeneration system, and a recovery and regeneration system;

[0007] The adsorption separation system is used to adsorb and separate resource substances in wastewater to be treated using adsorption materials; wherein, the resource substances in the wastewater to be treated include oily substances and phenolic substances.

[0008] The adsorbent material regeneration system is used to regenerate the adsorbent material using a regeneration solution;

[0009] The recycling and regeneration system is used to regenerate the regenerated liquid and separate and recover the adsorbed resource substances.

[0010] The adsorption separation system includes a wastewater equalization tank and an adsorption separation device; the outlet of the wastewater equalization tank is connected to the inlet of the adsorption device of the adsorption separation device; wherein, the adsorption separation device is filled with adsorbent material.

[0011] The adsorption material regeneration system includes a regeneration liquid storage tank; the regeneration liquid outlet of the regeneration liquid storage tank is connected to the adsorption device inlet of the adsorption separation device; wherein, the regeneration liquid storage tank stores regeneration liquid.

[0012] The recycling and regeneration system includes a reflux and regeneration separation tank, a resource material storage tank, a heating device, and a cooling reflux device. The regenerated liquid inlet of the reflux and regeneration separation tank is connected to the liquid outlet of the adsorption device of the adsorption separation device, and the resource material outlet of the reflux and regeneration separation tank is connected to the resource material inlet of the resource material storage tank. The heating device is used to heat the inner cavity of the reflux and regeneration separation tank. The inlet of the cooling reflux device is connected to the top inlet of the reflux and regeneration separation tank, and the outlet of the cooling reflux device is connected to the regenerated liquid storage tank.

[0013] Furthermore, the adsorption separation device includes an adsorption device body, a water distribution and collection system, an ultrasonic emitting device, and an overflow drainage weir;

[0014] The adsorption device body has a separation working chamber inside, and the water distribution and collection system, the ultrasonic emitting device and the overflow drainage weir are all arranged in the separation working chamber; wherein, the water distribution and collection system is located at the bottom of the separation working chamber, the ultrasonic emitting device is arranged on the wall of the separation working chamber, and the overflow drainage weir is horizontally arranged at the top of the separation working chamber.

[0015] The adsorbent material is filled in the separation working chamber and placed between the water distribution and collection system and the overflow drainage weir.

[0016] Furthermore, the adsorption separation device also includes a retention filter plate; the retention filter plate is horizontally arranged in the separation working chamber and is located on the side near the lower surface of the overflow drainage weir.

[0017] Furthermore, the adsorption separation system also includes a wastewater collection tank; the inlet of the wastewater collection tank is connected to the outlet of the adsorption device body.

[0018] Furthermore, the inlet of the wastewater collection tank is connected to the outlet of the adsorption device of the adsorption device body through a collection tank inlet pipe, and a first solenoid valve is installed on the collection tank inlet pipe.

[0019] Furthermore, the outlet of the wastewater equalization tank is connected to the inlet of the adsorption device of the adsorption separation device through an adsorption device inlet pipe, and an adsorption device inlet pump is installed on the adsorption device inlet pipe.

[0020] The outlet of the regenerated liquid storage tank is connected to the inlet of the adsorption device of the adsorption separation device through a regenerated liquid inlet pipe, and a metering pump is installed on the regenerated liquid inlet pipe.

[0021] Furthermore, the regenerated liquid discharge inlet of the reflux and regeneration separation tank is connected to the adsorption device outlet of the adsorption separation device through a regenerated liquid discharge pipe, and a regenerated liquid discharge pump is installed on the regenerated liquid discharge pipe.

[0022] The resource material outlet of the reflux and regeneration separation tank and the resource material inlet of the resource material storage tank are connected by a resource material discharge pipe, and a third solenoid valve is installed on the resource material discharge pipe.

[0023] Furthermore, the heating device employs a steam spiral pipe, which is uniformly wound around the outer wall of the reflux and regeneration separation tank.

[0024] Furthermore, the cooling reflux device includes a cooling reflux pipe, a cooling water circulation pipe, and a siphon pump;

[0025] The inlet of the cooling reflux pipe is connected to the top inlet of the reflux and regeneration separation tank, and the outlet of the cooling reflux pipe is connected to the regenerated liquid storage tank; the cooling water circulation pipe is located on the side of the cooling reflux device to provide a cold source for the cooling reflux pipe; the siphon pump is located on the cooling reflux pipe and is located near the outlet end of the cooling reflux pipe; a second solenoid valve is also provided on the cooling reflux pipe.

[0026] Furthermore, the adsorbent material is MOFs / particulate carbon ball material, and the regeneration liquid is methanol.

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0028] This utility model provides a resource substance recovery system for coal chemical wastewater. It utilizes adsorption material in an adsorption separation device to efficiently separate oils and phenols. A wastewater equalization tank continuously supplies wastewater to the adsorption separation device, ensuring water treatment stability. An adsorption material regeneration system provides regenerated liquid to the adsorption separation device, achieving elution and regeneration of the adsorption material, thus realizing the recycling of the adsorption material and effectively reducing recovery costs. The system combines regeneration liquid regeneration with resource substance recovery and storage. Specifically, the adsorption material in the adsorption separation device adsorbs and separates oils and phenols from the wastewater, efficiently separating the target resources. The wastewater equalization tank regulates the wastewater entering the adsorption separation device, ensuring relatively stable water quality and flow rate, which improves adsorption separation efficiency and system stability. The raw liquid storage tank provides regenerated liquid to the adsorption separation device to regenerate the adsorbent material, enabling it to regain its adsorption capacity after adsorbing resource substances, achieving recycling, reducing treatment costs, and improving resource utilization. The reflux and regeneration separation tank receives the regenerated liquid discharged from the adsorption separation device, heats its internal cavity through a heating device, and combines it with a cooling reflux device to achieve the regeneration of the regenerated liquid and the separation and recovery of adsorbed resource substances, avoiding the waste of a large amount of regenerated liquid, while efficiently recovering resource substances. This utility model belongs to pure physical adsorption separation, does not generate harmful waste, does not introduce new pollutants, has low energy consumption and low investment, and is a green, low-carbon, and efficient method for the recovery and separation of resource substances such as oil and phenol. The system not only significantly reduces the operating cost of wastewater treatment, but also improves the adaptability and degradability of wastewater biochemical treatment, better meets the water quality requirements of pretreated effluent, and powerfully promotes the green, low-carbon, and efficient treatment and resource recovery of coal chemical wastewater.

[0029] Furthermore, by installing an ultrasonic emission device within the adsorption separation unit, the combined effect of ultrasound and eluent can more easily achieve the desorption of oil and phenol, effectively improving the elution effect of the adsorption material and the system efficiency.

[0030] Furthermore, MOFs / granular carbon spheres are used as adsorbents to selectively adsorb and separate oil and phenolic substances in the wastewater to be treated. MOFs / granular carbon spheres have high adsorption and separation efficiency and are easy to regenerate. In addition, the large particle size of the material makes it less prone to loss, effectively avoiding the problem of easy loss of powder adsorbents. Methanol is used as the regeneration liquid. At the same time, oil and phenolic substances have a large boiling point difference with methanol, and methanol regeneration and oil and phenol recovery can be achieved with low energy consumption. Attached Figure Description

[0031] Figure 1A structural block diagram of the resource recovery system for coal chemical wastewater provided by this utility model;

[0032] Figure 2 This utility model provides an operational principle diagram of a system for recovering resource substances from coal chemical wastewater.

[0033] The components include: 1. Wastewater equalization tank; 2. Adsorption separation device; 3. Wastewater collection tank; 4. Recirculation and regeneration separation tank; 5. Regenerated liquid storage tank; 6. Resource material storage tank; 7. Equalization tank outlet; 8. Adsorption device inlet pipe; 9. Adsorption device inlet pump; 10. Adsorption device inlet; 11. Water distribution and collection system; 12. First liquid level sensor; 13. Ultrasonic transmitting device; 14. Filter plate; 15. Overflow drainage weir; 16. Vent valve; 17. Adsorption device drain outlet; 18. Collection tank inlet pipe; 19. First solenoid valve; 20. Collection tank outlet; 21. Water quality monitor; 22. Regenerated liquid outlet. ; 23. Metering pump; 24. Regenerated liquid inlet pipe; 25. Adsorption device inlet; 26. Adsorption device outlet; 27. Regenerated liquid outlet pipe; 28. Regenerated liquid outlet pump; 29. ​​Regenerated liquid outlet; 30. Heating device; 31. Second liquid level sensor; 32. Temperature sensor; 33. Steam source inlet; 34. Cooling reflux device; 35. Cooling reflux pipe; 36. Cooling water circulation pipe; 37. Siphon pump; 38. Third liquid level sensor; 39. Regenerated liquid replenishment port; 40. Resource material outlet; 41. Third solenoid valve; 42. Resource material outlet pipe; 43. Resource material outlet. Detailed Implementation

[0034] To make the technical problem solved by this utility model, the technical solution, and the beneficial effects clearer, the following specific embodiments provide a further detailed description of this utility model. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it.

[0035] This invention provides a system for recovering resource substances from coal chemical wastewater, comprising an adsorption separation system, an adsorption material regeneration system, and a recovery and regeneration system. The adsorption separation system is used to adsorb and separate resource substances in the wastewater to be treated using an adsorption material. The resource substances in the wastewater to be treated include oily substances and phenolic substances. The adsorption material regeneration system is used to regenerate the adsorption material using a regeneration solution. The recovery and regeneration system is used to regenerate the regeneration solution and separate and recover the adsorbed resource substances.

[0036] The adsorption separation system includes a wastewater equalization tank 1 and an adsorption separation device 2; the outlet of the wastewater equalization tank 1 is connected to the inlet of the adsorption device 2; wherein the adsorption separation device 2 is filled with adsorbent material. The adsorbent material regeneration system includes a regenerated liquid storage tank 5; the outlet of the regenerated liquid storage tank 5 is connected to the inlet of the adsorption device 2; wherein the regenerated liquid storage tank 5 stores regenerated liquid. The recycling and regeneration system includes a reflux and regeneration separation tank 4, a resource material storage tank 6, a heating device 30, and a cooling reflux device 34. The regenerated liquid discharge inlet of the reflux and regeneration separation tank 4 is connected to the adsorption device outlet of the adsorption separation device 2, and the resource material discharge outlet of the reflux and regeneration separation tank 4 is connected to the resource material discharge inlet of the resource material storage tank 6. The heating device 30 is used to heat the inner cavity of the reflux and regeneration separation tank 4. The inlet of the cooling reflux device 34 is connected to the top inlet of the reflux and regeneration separation tank 4, and the outlet of the cooling reflux device 34 is connected to the regenerated liquid storage tank 5.

[0037] The resource recovery system for coal chemical wastewater described in this utility model, through the establishment of an adsorption separation system, an adsorption material regeneration system, and a recovery and regeneration system, achieves efficient separation and recovery of oil and phenolic resources in coal chemical wastewater based on the coordinated operation of these systems. This effectively reduces reagent and energy costs and promotes the recycling of adsorption materials. Simultaneously, it enhances the biochemical treatment efficiency of wastewater, ensures that pretreated water meets standards, achieves green and low-carbon treatment goals, and balances economic benefits with environmental protection requirements, providing a high-quality solution for the treatment and resource utilization of coal chemical wastewater.

[0038] The following detailed description uses specific embodiments to further explain the resource recovery system for coal chemical wastewater provided by this utility model:

[0039] Example 1

[0040] As attached Figure 1 As shown in Embodiment 1, this embodiment provides a system for recovering resource substances from coal chemical wastewater, including an adsorption separation system, an adsorption material regeneration system, and a recovery and regeneration system. The adsorption separation system is used to adsorb and separate resource substances in the wastewater to be treated using adsorption materials. The resource substances in the wastewater to be treated include oily substances and phenolic substances. The adsorption material regeneration system is used to regenerate the adsorption material using a regeneration liquid. The recovery and regeneration system is used to regenerate the regeneration liquid and separate and recover the adsorbed resource substances.

[0041] The adsorption separation system includes a wastewater regulating tank 1, an adsorption separation device 2, a wastewater collection tank 3, an adsorption device inlet pipe 8, an adsorption device inlet pump 9, a collection tank discharge pipe 18, and a first solenoid valve 19.

[0042] The wastewater regulating tank 1 stores wastewater to be treated, which is coal chemical wastewater; the bottom of the wastewater regulating tank 1 is provided with a regulating tank outlet 7; the regulating tank outlet of the wastewater regulating tank 1 is connected to the adsorption device inlet 10 of the adsorption separation device 2, the adsorption device outlet 17 of the adsorption separation device 2 is connected to the collection tank outlet 20 of the wastewater collection tank 3; the adsorption device outlet 26 of the adsorption separation device 2 is connected to the recovery and regeneration system, and the adsorption device inlet 25 of the adsorption separation device 2 is connected to the adsorption material regeneration system; wherein, the adsorption separation device 2 is filled with adsorption material.

[0043] Preferably, the adsorbent material is MOFs / particulate carbon ball material; it should be noted that MOFs / particulate carbon ball material exhibits highly efficient selective separation and recovery characteristics for oil and phenol in wastewater, and the material also exhibits stable and continuous adsorption efficiency.

[0044] The adsorption separation device 2 includes an adsorption device body, a water distribution and collection system 11, an ultrasonic emitting device 13, a filter plate 14, an overflow drainage weir 15, and a venting valve 16.

[0045] The adsorption device body has a separation working chamber inside, a water distribution and collection system 11, an ultrasonic emitting device 13, a filter plate 14, and an overflow drainage weir 15; wherein, the water inlet 10 of the adsorption device is located at the bottom of one side of the adsorption device body; the drain outlet 17 of the adsorption device is located at the top of one side of the adsorption device body, and is located near the wastewater collection tank 3; the liquid inlet 25 of the adsorption device is located at the top of the other side of the adsorption device body, and the liquid outlet 26 of the adsorption device is located at the bottom of the other side of the adsorption device body; the top of the adsorption device body is provided with an exhaust hole, and the vent valve 16 is installed at the exhaust hole.

[0046] The water distribution and collection system 11 is located at the bottom of the separation working chamber, used to evenly distribute the wastewater to be treated within the internal area of ​​the separation working chamber, and also to collect the regenerated liquid containing dissolved resource substances. Specifically, by setting up the water distribution and collection system 11, the wastewater to be treated can be in full contact with the adsorbent material at a preset flow rate, and the regenerated liquid flowing from the top to the bottom can also be collected. The ultrasonic transmitting device 13 is located on the inner wall of the separation working chamber, used to emit ultrasonic waves into the separation working chamber. The power or frequency of the ultrasonic transmitting device 13 can be adjusted according to actual needs. The overflow drainage weir 15 is horizontally located at the top of the separation working chamber, used for overflowing and discharging the wastewater in the separation working chamber. The drain outlet 17 of the adsorption device is located in the concave part of the overflow drainage weir 15. It should be noted that the wastewater collection tank 3 is low in height. The overflow drainage weir 15 is positioned at a height such that the overflow water can be discharged by gravity flow. The adsorbent material is filled in the separation working chamber and placed between the water distribution and collection system 11 and the overflow drainage weir 15. Specifically, the water distribution and collection system 11 and the overflow drainage weir 15 are provided with a material filling area, and the adsorbent material is filled in the material filling area. The intercepting filter plate 14 is horizontally arranged in the separation working chamber and is located near the lower surface of the overflow drainage weir 15. By setting the intercepting filter plate 14 inside the adsorption separation device 2, the pressureless flow of wastewater can be ensured while effectively preventing the loss of adsorbent material. It should be noted that the top of the adsorption device body and the connection between the adsorption device body and the overflow drainage weir 15 are fixed in a detachable manner to facilitate the replacement and maintenance of the adsorbent material.

[0047] The outlet 7 of the wastewater equalization tank 1 is connected to the inlet 10 of the adsorption device 2 via an adsorption device inlet pipe 8. Specifically, the adsorption device inlet pipe 8 is located between the outlet 7 of the equalization tank and the inlet 10 of the adsorption device, with one end connected to the outlet 7 of the equalization tank and the other end connected to the inlet 10 of the adsorption device. The adsorption device inlet pump 9 is installed on the adsorption device inlet pipe 8.

[0048] The wastewater collection tank 3 has its collection tank inlet 20 connected to the adsorption device outlet 17 on the adsorption device body via a collection tank inlet pipe 18. Specifically, the collection tank inlet pipe 18 is located between the collection tank inlet 20 and the adsorption device outlet 17, with one end of the collection tank inlet pipe 18 connected to the adsorption device outlet 17 and the other end connected to the collection tank inlet 20. The first solenoid valve 19 is located on the collection tank inlet 18.

[0049] The adsorbent material regeneration system includes a regenerated liquid storage tank 5, an inlet metering pump 23, and a regenerated liquid inlet pipe 24.

[0050] The regenerated liquid storage tank 5 stores regenerated liquid, which is methanol. The regenerated liquid outlet 22 of the regenerated liquid storage tank 5 is connected to the adsorption device inlet 25 of the adsorption separation device 2. The regenerated liquid outlet 22 of the regenerated liquid storage tank 5 and the adsorption device inlet 25 of the adsorption separation device 2 are connected by a regenerated liquid inlet pipe 24. Specifically, the regenerated liquid inlet pipe 24 is located at the regenerated liquid outlet 22 and the adsorption device inlet 25, with one end connected to the regenerated liquid outlet 22 and the other end connected to the adsorption device inlet 25. The metering pump 23 is installed on the regenerated liquid inlet pipe 24. The regenerated liquid storage tank 5 is also connected to the recycling and regeneration system for collecting and storing the regenerated liquid regenerated in the recycling and regeneration system. The top of the regenerated liquid storage tank 5 is also provided with a regenerated liquid replenishment port 39 for adding new regenerated liquid to the regenerated liquid storage tank 5.

[0051] The recycling and regeneration system includes a reflux and regeneration separation tank 4, a resource material storage tank 6, a regenerated liquid discharge pipe 27, a regenerated liquid discharge pump 28, a heating device 30, a cooling reflux device 34, a third solenoid valve 41, and a resource material discharge pipe 42.

[0052] The regenerated liquid inlet 29 of the reflux and regeneration separation tank 4 is connected to the adsorption device outlet 26 of the adsorption separation device 2; wherein, the regenerated liquid inlet 29 is located in the middle of the side wall of the reflux and regeneration separation tank 4; specifically, the regenerated liquid inlet 29 of the reflux and regeneration separation tank 4 and the adsorption device outlet 26 of the adsorption separation device 2 are connected through the regenerated liquid discharge pipe 27; wherein, the regenerated liquid discharge pipe 27 is located between the regenerated liquid inlet 29 and the adsorption device outlet 26, one end of the regenerated liquid discharge pipe 27 is connected to the regenerated liquid inlet 29, and the other end of the regenerated liquid discharge pipe 27 is connected to the adsorption device outlet 26; the regenerated liquid discharge pump 28 is installed on the regenerated liquid discharge pipe 27.

[0053] The resource material outlet of the reflux and regeneration separation tank 4 is connected to the resource material inlet of the resource material storage tank 6; specifically, the resource material outlet 40 of the reflux and regeneration separation tank 4 and the resource material inlet 43 of the resource material storage tank 6 are connected by a resource material discharge pipe 42; wherein, the resource material discharge pipe 42 is disposed between the resource material outlet 40 and the resource material inlet 43, one end of the resource material discharge pipe 42 is connected to the resource material outlet 40, and the other end of the resource material discharge pipe 42 is connected to the resource material inlet 43; the third solenoid valve 41 is disposed on the resource material discharge pipe 42.

[0054] The heating device 30 is used to heat the inner cavity of the reflux and regeneration separation tank 4; preferably, the heating device 30 is a steam spiral pipe, which is uniformly wound around the outer wall of the reflux and regeneration separation tank 4; wherein, the steam spiral pipe serves as a flow channel for preset high-temperature steam, and the steam source inlet 33 of the steam spiral pipe is connected to a preset external steam source.

[0055] The cooling reflux device 34 is located at the top of the reflux and regeneration separation tank 4. The inlet of the cooling reflux device 34 is connected to the top inlet of the reflux and regeneration separation tank 4, and the outlet of the cooling reflux device 34 is connected to the regenerated liquid storage tank 5. The cooling reflux device 34 includes a cooling reflux pipe 35, a cooling water circulation pipe 36, a siphon pump 37, and a second solenoid valve.

[0056] The cooling return pipe 35 is located at the top of the reflux and regeneration separation tank 4. The inlet of the cooling return pipe 35 is connected to the top inlet of the reflux and regeneration separation tank 4, and the outlet of the cooling return pipe 35 is connected to the regenerated liquid storage tank 5. The cooling water circulation pipe 36 is located on the side of the cooling return device 35 and is used to provide a cold source for the cooling return pipe 35. Specifically, a preset circulating cooling medium is introduced into the cooling return pipe 35 to facilitate heat exchange between the cooling water circulation pipe 36 and the cooling return pipe 35. The siphon pump 37 is located on the cooling return pipe 35 and is positioned near the outlet end of the cooling return pipe 35. The second solenoid valve is located on the cooling return pipe 35.

[0057] Working principle:

[0058] The resource recovery system for coal chemical wastewater described in this utility model operates as follows:

[0059] First, the adsorption separation system is started. After the adsorption separation system is started, the wastewater to be treated is injected into the adsorption device body from the wastewater equalization tank 1 through the adsorption device inlet pump 9. Then, water is evenly distributed at a preset flow rate through the water distribution and collection system 11. After the wastewater to be treated flows through the material filling area, it is discharged through the overflow drainage weir 15. The discharged wastewater enters the wastewater collection tank 3 through the adsorption device drain outlet 17, the collection tank inlet pipe 18 and the collection tank outlet 20 under the action of gravity. Among them, when the wastewater to be treated flows through the adsorption material in the material filling area, the oil and phenolic substances in the wastewater to be treated are fully separated by the adsorption and retention effect of the adsorption material.

[0060] Next, the adsorption separation system is shut down, and the adsorption material regeneration system is started. After the adsorption material regeneration system is started, the regeneration liquid in the regeneration liquid storage tank 5 is injected into the adsorption device body 2 under the action of the inlet metering pump 23, and the amount of regeneration liquid entering is controlled. When the amount of regeneration liquid entering reaches the preset requirement, the inlet metering pump 23 is shut down, and the ultrasonic transmitting device 13 is turned on at the same time. The oil and phenolic substances adsorbed by the adsorption material are fully dissolved in the regeneration liquid under the action of ultrasound. After the preset time of ultrasonic action, the adsorption material is fully regenerated. Then, the regeneration liquid containing dissolved oil and phenolic substances is discharged to the return and regeneration separation tank 4 through the water distribution and collection system 11. Among them, after all the regeneration liquid containing oil and phenolic substances in the adsorption device body 2 is discharged, the adsorption material regeneration system is shut down.

[0061] Next, the recycling and regeneration system is started. After the recycling and regeneration system is started, due to the low boiling point of the regenerated liquid, the regenerated liquid enters the cooling return pipe 35 in gaseous form through the top inlet under the heating action of the heating device 30. Under the cooling action of the cooling water circulation pipe 36, it is cooled into liquid regenerated liquid, realizing the return and regeneration of the regenerated liquid. Then, under the suction action of the siphon pump 37, the cooled regenerated liquid is pumped to the regenerated liquid storage tank 5. After the regenerated liquid is processed, the heating device and the cooling return device 34 are turned off. Then, the recovered resource material is collected into the resource material storage tank 6 through the resource material discharge port 40. The recycling and regeneration system is turned off, waiting for the next processing.

[0062] Example explanation:

[0063] The resource recovery system for coal chemical wastewater described in Example 1 was used to treat actual coal chemical wastewater for resource recovery; the treatment capacity was 0.5 t / h, the influent oil content was 2000-3000 mg / L, and the influent phenol content was 4000-5000 mg / L; analysis of the treated wastewater revealed:

[0064] After being treated by an adsorption separation device, the oil concentration in coal chemical wastewater containing oil and phenol is reduced to below 100 mg / L and the phenol concentration to below 250 mg / L. After the regenerated liquid passes through a reflux and regeneration separation tank, the regeneration rate of the regenerated liquid reaches over 98%, and the recovery rate of oil and phenolic substances reaches over 95%. The entire system is simple and convenient to operate, and multiple systems can be operated simultaneously. No abnormal phenomena such as blockage or leakage were observed after the system operated continuously for 30 days.

[0065] The resource recovery system for coal chemical wastewater described in Example 1 efficiently separates oil and phenol resources through an adsorption separation system, achieves material recycling through an adsorption material regeneration system, and completes eluent regeneration and resource recovery and storage through a recovery and regeneration system. This significantly improves the biochemical treatment performance of wastewater while reducing costs and ensuring the quality of pretreated effluent, providing strong support for the green and low-carbon treatment and resource utilization of coal chemical wastewater. The system has a simple operation process, allowing each system to operate independently, reducing operating and management costs and facilitating operation and management. This invention is a purely physical adsorption separation method that does not generate harmful waste or introduce new pollutants. It has low energy consumption and low investment, making it a green, low-carbon, and efficient method for recovering and separating oil and phenol resources.

[0066] In this Example 1, MOFs / particulate carbon spheres are selected as the adsorbent material for oil and phenol. The material has high adsorption and separation efficiency and is easy to regenerate. The large particle size of the material makes it less prone to loss, effectively avoiding the easy loss of powder adsorbent. The regeneration method of the selective adsorbent material MOFs / particulate carbon spheres is a combination of ultrasound and solvent elution. Under the action of ultrasound, the desorption of oil and phenol is more easily achieved. At the same time, oil and phenol have a large boiling point difference with the regenerated liquid methanol, and the regeneration of methanol and the recovery of oil and phenol can be achieved with low energy consumption.

[0067] Example 2

[0068] As attached Figure 1 As shown, the resource recovery system for coal chemical wastewater provided in this embodiment 2 is basically the same as the resource recovery system for coal chemical wastewater provided in embodiment 1 above, except that:

[0069] The resource recovery system for coal chemical wastewater described in this embodiment 2 further includes: a first liquid level sensor 12, a water quality monitor 21, a second liquid level sensor 31, a temperature sensor 32, a third liquid level sensor 38, and a system control center.

[0070] The first liquid level sensor 12 is installed inside the adsorption device body and is used to collect the liquid level height inside the adsorption device body; the water quality monitor 21 is installed inside the wastewater collection tank 3 and is positioned directly opposite the collection tank outlet 20 of the wastewater collection tank 3; the water quality monitor 21 is used to collect preset wastewater indicators in the wastewater collection tank 3.

[0071] The second liquid level sensor 31 and the temperature sensor 32 are both installed inside the reflux and regeneration separation tank 4. The second liquid level sensor 31 is used to collect the liquid level height inside the reflux and regeneration separation tank 4, and the temperature sensor 32 is used to collect the internal temperature of the reflux and regeneration separation tank 4.

[0072] The third liquid level sensor 38 is installed inside the regenerated liquid storage tank 5 and is used to collect the liquid level height inside the regenerated liquid storage tank 5.

[0073] The output terminals of the first liquid level sensor 12, the water quality monitor 21, the second liquid level sensor 31, the temperature sensor 32, and the third liquid level sensor 38 are all connected to the input terminal of the system control center. The output terminal of the system control center is connected to the adsorption device inlet pump 9, the ultrasonic emitting device 13, the first solenoid valve 19, the liquid metering pump 23, the eluent discharge pump 28, the heating device 30, the siphon pump 37, the second solenoid valve, and the third solenoid valve 41, respectively.

[0074] The system control center is used to control the start and stop of the adsorption device inlet pump 9, the ultrasonic emitting device 13, the first solenoid valve 19, the inlet metering pump 23, the eluent discharge pump 28, the heating device 30, the siphon pump 37, the second solenoid valve, and the third solenoid valve 41 based on the liquid level height in the adsorption device body collected by the first liquid level sensor 12, the preset wastewater index in the wastewater collection tank 3 collected by the water quality monitor 21, the liquid level height in the reflux and regeneration separation tank 4 collected by the second liquid level sensor 31, the internal temperature of the reflux and regeneration separation tank 4 collected by the temperature sensor 32, and the liquid level height in the regenerated liquid storage tank 5 collected by the third liquid level sensor 38.

[0075] Control principle:

[0076] As attached Figure 2 As shown in Example 2, the control principle of the resource recovery system for coal chemical wastewater is as follows:

[0077] Based on feedback information from the first liquid level sensor 12 and the water quality monitor 21, the start and stop of the inlet pump 9 and the first solenoid valve 19 of the adsorption device are controlled to achieve the adsorption and separation of resource substances in the adsorption separation device 2. Based on feedback information from the first liquid level sensor 12 and the third liquid level sensor 38, the start and stop of the inlet metering pump 23 and the ultrasonic emitting device 13 are controlled to achieve efficient regeneration of the adsorbent material in the adsorption separation device 2. Based on feedback information from the second liquid level sensor 31 and the temperature sensor 32, the temperature of the heating device 30 is regulated, and the start and stop of the siphon pump 37, the second solenoid valve and the third solenoid valve 41 are controlled to achieve the recovery of resource substances and the regeneration of the eluent.

[0078] It should be noted that the liquid level height inside the adsorption device body, i.e., the inlet water level, is obtained by the first liquid level sensor 12; the inlet water level can be regulated by the adsorption device inlet pump 9; similarly, based on the inlet water level obtained by the first liquid level sensor 12, the volume of regenerated liquid entering the device can be controlled by the inlet metering pump 23; the preset wastewater index in the wastewater collection tank 3, i.e., the effluent water quality, is obtained by the water quality monitor 21; the effluent water quality can be regulated by adjusting the regeneration frequency or regeneration time of the adsorption material; based on the feedback information from the third liquid level sensor 38 in the regenerated liquid storage tank 5, the requirements of the regenerated liquid are met by adding regenerated liquid; based on the feedback information from the second liquid level sensor 31 and the temperature sensor 32, the normal operation of the recycling and regeneration system is met by regulating the heating device 30 and the cooling reflux device 34; and the ultrasonic emission requirements are met by adjusting the power and frequency of the ultrasonic emission device 13.

[0079] The resource recovery system for coal chemical wastewater described in this utility model reduces the cost of frequent material replacement through the recycling of adsorption materials. Compared with existing technologies, the system reduces reagent consumption and energy consumption, thereby significantly lowering the operating costs of coal chemical wastewater treatment. Through the green recovery of resources such as oil and phenols from coal chemical wastewater, it can greatly improve the stability, adaptability, and effective degradation of the biochemical treatment of coal chemical wastewater. This helps improve the efficiency and quality of the entire wastewater treatment process, making it easier for wastewater to meet the standards for harmless treatment. It avoids complex and ineffective treatment methods such as multiple distillation processes in existing technologies, better meeting the pre-treatment effluent quality requirements of coal chemical wastewater and providing a strong guarantee for subsequent advanced treatment or compliant discharge.

[0080] The above embodiments are merely one of the implementation methods to achieve the technical solution of this utility model. The scope of protection claimed by this utility model is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model.

Claims

1. A system for recovering resources from coal chemical wastewater, characterized in that, This includes an adsorption separation system, an adsorption material regeneration system, and a recovery and regeneration system; The adsorption separation system is used to adsorb and separate resource substances in wastewater to be treated using adsorption materials; wherein, the resource substances in the wastewater to be treated include oily substances and phenolic substances. The adsorbent material regeneration system is used to regenerate the adsorbent material using a regeneration solution; The recycling and regeneration system is used to regenerate the regenerated liquid and separate and recover the adsorbed resource substances. The adsorption separation system includes a wastewater regulating tank (1) and an adsorption separation device (2); the outlet of the wastewater regulating tank (1) is connected to the inlet of the adsorption device of the adsorption separation device (2); wherein the adsorption separation device (2) is filled with adsorption material. The adsorption material regeneration system includes a regeneration liquid storage tank (5); the regeneration liquid outlet of the regeneration liquid storage tank (5) is connected to the adsorption device inlet of the adsorption separation device (2); wherein, the regeneration liquid storage tank (5) stores regeneration liquid. The recycling and regeneration system includes a reflux and regeneration separation tank (4), a resource material storage tank (6), a heating device (30), and a cooling reflux device (34). The regenerated liquid discharge inlet of the reflux and regeneration separation tank (4) is connected to the adsorption device outlet of the adsorption separation device (2), and the resource material discharge outlet of the reflux and regeneration separation tank (4) is connected to the resource material discharge inlet of the resource material storage tank (6). The heating device (30) is used to heat the inner cavity of the reflux and regeneration separation tank (4). The inlet of the cooling reflux device (34) is connected to the top inlet of the reflux and regeneration separation tank (4), and the outlet of the cooling reflux device (34) is connected to the regenerated liquid storage tank (5).

2. The system for recycling resources in coal chemical wastewater according to claim 1, characterized in that, The adsorption separation device (2) includes an adsorption device body, a water distribution and collection system (11), an ultrasonic emitting device (13), and an overflow drainage weir (15). The adsorption device body has a separation working chamber inside, and the water distribution and collection system (11), the ultrasonic emitting device (13) and the overflow drainage weir (15) are all arranged in the separation working chamber; wherein, the water distribution and collection system (11) is located at the bottom of the separation working chamber, the ultrasonic emitting device (13) is arranged on the wall of the separation working chamber, and the overflow drainage weir (15) is horizontally arranged at the top of the separation working chamber; The adsorbent material is filled in the separation working chamber and placed between the water distribution and collection system (11) and the overflow drainage weir (15).

3. The system for recovering resource substances in coal chemical wastewater according to claim 2, characterized in that, The adsorption separation device (2) also includes a retention filter plate (14); the retention filter plate (14) is horizontally arranged in the separation working chamber and is located on the side near the lower surface of the overflow drainage weir (15).

4. The system for recycling resources in coal chemical wastewater according to claim 2, characterized in that, The adsorption separation system further includes a wastewater collection tank (3); the inlet of the wastewater collection tank (3) is connected to the outlet of the adsorption device of the adsorption device body.

5. The system for recycling resources in coal chemical wastewater according to claim 4, characterized in that, The wastewater collection tank (3) is connected to the adsorption device drain outlet of the adsorption device body through a collection tank inlet pipe (18), and a first solenoid valve (19) is provided on the collection tank inlet pipe (18).

6. The system for recycling resources from coal chemical wastewater according to claim 1, characterized in that, The outlet of the wastewater regulating tank (1) is connected to the inlet of the adsorption device of the adsorption separation device (2) through the adsorption device inlet pipe (8), and the adsorption device inlet pump (9) is installed on the adsorption device inlet pipe (8). The regenerated liquid outlet of the regenerated liquid storage tank (5) is connected to the adsorption device inlet of the adsorption separation device (2) through a regenerated liquid inlet pipe (24), and a metering pump (23) is installed on the regenerated liquid inlet pipe (24).

7. The system for recovering resources from coal chemical wastewater according to claim 1, wherein, The regenerated liquid discharge inlet of the reflux and regeneration separation tank (4) is connected to the adsorption device outlet of the adsorption separation device (2) through a regenerated liquid discharge pipe (27), and a regenerated liquid discharge pump (28) is provided on the regenerated liquid discharge pipe (27). The resource material outlet of the reflux and regeneration separation tank (4) is connected to the resource material inlet of the resource material storage tank (6) through a resource material discharge pipe (42), and a third solenoid valve (41) is provided on the resource material discharge pipe (42). 8.The system for recycling resource materials in coal chemical wastewater according to claim 1, characterized in that, The heating device (30) adopts a steam spiral pipe, which is uniformly wound around the outer wall of the reflux and regeneration separation tank (4).

9. The system for recovering resources from coal chemical wastewater according to claim 1, wherein, The cooling reflux device (34) includes a cooling reflux pipe (35), a cooling water circulation pipe (36), and a siphon pump (37). The inlet of the cooling return pipe (35) is connected to the top inlet of the return and regeneration separation tank (4), and the outlet of the cooling return pipe (35) is connected to the regenerated liquid storage tank (5); the cooling water circulation pipe (36) is located on the side of the cooling return device (34) to provide a cold source for the cooling return pipe (35); the siphon pump (37) is located on the cooling return pipe (35) and is located near the outlet end of the cooling return pipe (35); a second solenoid valve is also provided on the cooling return pipe (35).

10. The system for recovering resources from coal chemical wastewater according to claim 1, wherein, The adsorbent material is MOFs / particulate carbon ball material, and the regeneration solution is methanol.

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