CN217103449U - Phenol recovery and resin regeneration system in coal chemical wastewater - Google Patents

Abstract

The utility model discloses a phenol recovery and resin regeneration system in coal chemical industry wastewater, wherein a wastewater inlet of a distillation separation device is communicated with a liquid outlet of a wastewater pool, a wastewater outlet of the distillation separation device is communicated with an inlet of a resin adsorption device, a mixed liquid inlet of the distillation separation device is communicated with an outlet of the resin adsorption device, a phenol outlet of the distillation separation device is communicated with an inlet of a phenol collector, a steam outlet of the distillation separation device is connected with a steam inlet of a regenerated liquid recovery device, a regenerated liquid outlet of the regenerated liquid recovery device is connected with an inlet of a methanol regeneration liquid tank, an outlet of the methanol regeneration liquid tank is communicated with an inlet of the resin adsorption device, a heat source area and a separation area are arranged in the distillation separation device, the heat source area is provided with the inner center of the distillation separation device, and the separation area is formed by a gap between the inner wall of the distillation separation device and the heat source area, the utility model discloses a system is very big has reduced the waste water treatment cost, really realizes the purpose of utilization of resources maximize.

Description

A phenol recovery and resin regeneration system in coal chemical wastewater

technical field

The utility model belongs to the technical field of coal chemical wastewater treatment, in particular to a method for selective adsorption, recovery and resin regeneration of phenol in coal chemical wastewater.

Background technique

The phenol content in coal chemical wastewater is extremely high, and the pretreatment stage in the wastewater treatment stage is the primary process for treating coal chemical wastewater. The pretreatment process can not only reduce the content of phenol substances, but also can be recycled for utilization. However, the pretreated coal chemical wastewater still contains a large amount of toxic and harmful substances, typically phenolic substances, of which phenolic substances account for 40% to 50%.

The existing process equipment for removing phenol can remove certain phenol to a certain extent. However, the existing devices also have the following disadvantages: 1. The selective adsorption treatment of phenol cannot be realized. 2. After the adsorption of phenol, the extraction agent cannot be recovered, which is the reason for the high cost of the process. 3. The extractant can be partially recovered, but the regeneration and reuse of the extractant cannot be truly realized, which also causes the typical shortcomings of imperfect process and high cost. Therefore, the cost is high and the process is complicated, and the purpose of selective adsorption-regeneration and multiple utilization of the extractant resin cannot be realized.

Utility model content

In order to solve the problems existing in the prior art, the utility model provides a phenol recovery and resin regeneration system in coal chemical industry wastewater, which has low cost, low energy consumption, high recycling rate, high processing efficiency, short cycle, less land occupation, Simple operation, safe and pollution-free.

In order to achieve the above purpose, the utility model provides the following technical solutions: a phenol recovery and resin regeneration system in coal chemical industry wastewater, specifically including: waste water pool, distillation separation device, phenol collector, methanol regeneration liquid tank, resin adsorption device and regeneration Liquid recovery device, wherein, the waste water inlet of the distillation separation device is connected with the liquid outlet of the waste water tank, the waste water outlet of the distillation separation device is connected with the inlet of the resin adsorption device, and the mixed liquid inlet of the distillation separation device is connected with the outlet of the resin adsorption device, The phenol outlet of the distillation separation device is connected to the inlet of the phenol collector, the steam outlet of the distillation separation device is connected to the steam inlet of the regeneration liquid recovery device, the regeneration liquid outlet of the regeneration liquid recovery device is connected to the inlet of the methanol regeneration liquid tank, and the methanol regeneration liquid The outlet of the tank is communicated with the inlet of the resin adsorption device. A heat source area and a separation area are set in the distillation separation device. The gap between the inner wall and the heat source area is formed, and the separation area is used to provide separation conditions for the high temperature separation of methanol and phenol.

Further, the distillation separation device is also provided with an electric heating plate, and the electric heating plate is provided on the inner wall of the distillation separation device to provide a heat source for the separation zone.

Further, the heat source area is a conical cylinder, the bottom diameter of which is smaller than the distillation separation device, and the material is copper. The top inlet of the heat source area communicates with the liquid outlet of the waste water pool, and the bottom outlet of the heat source area passes through the waste water outlet pipe It is connected with the inlet of the resin adsorption device.

Further, the mixed liquid inlet of the distillation separation device is arranged on the side wall of the distillation separation device at the upper part of the heat source area.

Further, a phenol outlet is provided at the bottom of the separation zone, and the phenol outlet communicates with the inlet of the phenol collector.

Further, the resin adsorption device is filled with macroporous adsorption resin.

Further, the liquid inlet of the wastewater pool is set higher than the liquid outlet of the wastewater pool.

Further, the outlet of the resin adsorption device communicates with the lift pump through the mixed liquid inlet pipe, and the lift pump is used to inject the mixed liquid in the resin adsorption device into the separation zone of the distillation separation device.

Further, the steam outlet of the distillation separation device is connected with the inlet of the regeneration liquid recovery device through the regeneration heat collection pipe, and the regeneration liquid recovery device is used for static cooling of the regenerated methanol.

Compared with the prior art, the utility model has at least the following beneficial effects:

The utility model provides a phenol recovery and resin regeneration system in coal chemical industry wastewater, which uses a resin adsorption device to absorb phenol in the wastewater, and regenerates the resin in the resin adsorption device through methanol, thereby improving the utilization rate of the resin and reducing investment Cost; the utility model directly uses the coal chemical industry waste water as the heat source in the distillation separation device, passes the mixed solution obtained from the regeneration of the resin adsorption device into the distillation separation device, and can directly use the heat of the coal chemical industry wastewater to process the mixed solution in the resin adsorption device. Distillation recovery work greatly reduces the cost of wastewater treatment and truly achieves the purpose of maximizing resource utilization.

Preferably, the utility model arranges the mixed liquid inlet of the distillation separation device on the side wall of the distillation separation device at the upper part of the heat source area. When performing distillation and separation, the hot gas below the mixed liquid inlet is used to form a Convection accelerates the separation of methanol and phenol in the mixed liquor.

Preferably, the resin adsorption device of the present invention utilizes low-cost macroporous resins to efficiently and quickly absorb wastewater, and selectively adsorb and recover phenol in wastewater, which has remarkable effects and low energy consumption.

Description of drawings

Fig. 1 is the schematic diagram of the selective adsorption, recovery and resin regeneration process of phenol in the coal chemical industry wastewater of the present invention.

In the drawings: 1. Waste water inlet pipe, 2. Waste water pool; 3. Distillation separation device inlet pipe; 4. Distillation separation device heat source area; 5. Separation area; 6. Electric heating plate; 7. Phenol collector; 8. Waste water outlet pipe; 9. Mixed liquid inlet pipe; 10. Lift pump; 11. Methanol regeneration liquid tank; 12. Methanol regeneration liquid inlet pipe; 13. Resin adsorption device; 14. Outlet pipe; 15. Regeneration liquid recovery device; 16 , Regenerated liquid collection tube.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described below in conjunction with the accompanying drawings and specific implementation methods. What needs to be explained here is that many details listed in the specification are only for readers to have a thorough understanding of one or more aspects of the present utility model, and these aspects of the present utility model can be realized even without these specific details.

In order to solve the problems in the prior art that the selective adsorption of phenol cannot be realized and the extraction agent cannot be recovered after the adsorption of phenol, and the extraction agent can be partially recovered, but the extraction agent cannot be regenerated and reused.

As shown in Figure 1, the utility model provides a phenol recovery and resin regeneration system in coal chemical industry wastewater, which specifically includes a wastewater tank 2, a distillation separation device, a phenol collector 7, a methanol regeneration liquid tank 11, a resin adsorption device 13 and a regeneration Liquid recovery device 15, wherein the waste water pool 2 is used to collect coal chemical industry wastewater, the entrance of the waste water pool 2 is connected with the waste water inlet pipe 1, and the waste water inlet of the distillation separation device passes through the water inlet pipe 3 of the distillation separation device and the liquid outlet of the waste water pool 2 The connection is used to input coal chemical wastewater into the distillation separation device;

The interior of the distillation separation device includes a heat source area 4 arranged in the middle, and a separation area 5 formed by the gap between the inner wall of the distillation separation device and the heat source area 4. The heat source area 4 is used to hold the coal chemical industry wastewater, and its top is connected to the distillation separation device. The water inlet pipe 3 is connected, and the waste liquid outlet is provided at the bottom of the heat source area 4, and the waste water outlet pipe 8 is connected with the inlet of the resin adsorption device 13 for passing the heat-exchanged coal chemical wastewater into the resin adsorption device 13 for resin adsorption;

The outlet of the resin adsorption device 13 communicates with the mixed liquid inlet on the side wall of the distillation separation device arranged on the top of the heat source area 4, and the mixed liquid in the resin adsorption device 13 flows into the lift pump 10 through the water outlet pipe 14 through the mixed liquid inlet pipe 9, The lift pump 10 injects the mixed liquid into the separation zone 5 of the distillation separation device through the mixed liquid inlet, and separates the methanol and phenol in the mixed liquid by utilizing the difference in the boiling points of methanol and phenol; the bottom of the separation zone 5 of the distillation separation device is set Phenol outlet, the phenol outlet is connected with the inlet of phenol collector 7, and is used to collect the phenol separated in the resin regeneration mixed solution;

The steam inlet of the regeneration liquid recovery device 15 is connected to the steam outlet provided on the top of the distillation separation device for collecting the methanol separated from the resin regeneration mixed liquid and cooling down to obtain regenerated methanol. The regeneration liquid outlet of the regeneration liquid recovery device 15 is It is connected with the inlet of the methanol regeneration liquid tank 11 for storing regenerated methanol, and the outlet of the methanol regeneration liquid tank 11 is communicated with the inlet of the resin adsorption device 13 for passing the regenerated methanol into the resin adsorption device 13 to the resin adsorption device 13 of the resin for resin regeneration.

Preferably, the interior of the distillation separation device also includes an electric heating plate 6 arranged on the inner wall of the distillation separation device. The electric heating plate 6 is used to quickly provide heat on the premise that the heat source area 4 provides a temperature of 40°C to ensure that the temperature of the separation area 5 can be maintained. Stably reach the required temperature of 66°C for the separation of methanol and phenol, and use the different boiling points of methanol and phenol to separate methanol and phenol in the mixed liquid;

After being adsorbed in the resin adsorption device 13, the coal chemical industry wastewater is discharged through the outlet pipe 14, and the methanol in the methanol regeneration liquid tank 11 is passed into the resin adsorption device 13 for resin regeneration to obtain a mixed solution;

It is known that the boiling point of methanol is 64.7°C and that of phenol is 181.7°C. Therefore, after being separated by the separation zone 5, the phenol is collected and utilized by the phenol collector 7; the methanol is collected by the regeneration heat collection pipe 16 to the regeneration liquid recovery device 15 for static cooling, and the methanol after static cooling enters the methanol regeneration liquid again Tank 11 for reuse.

Preferably, the water inlet pipe 3 of the distillation separation device is set lower than the water inlet pipe 1, and the high-temperature coal chemical wastewater is passed into the heat source area 4 of the distillation separation device by using the water level difference between the two, and the heat source area 4 of the distillation separation device is to be injected After the coal chemical industry wastewater is full, the coal chemical industry wastewater flows into the resin adsorption device 13 through the wastewater outlet pipe 8 from the wastewater outlet of the distillation separation device.

Preferably, the heat source area 4 is a conical cylinder with a large specific surface area, and its bottom diameter is smaller than that of the distillation separation device. The material is copper, and the heat transfer is fast. The utility model utilizes the shape characteristics of the heat source area 4 to maximize the heat release speed , in practical application, it is only necessary to ensure that the heat source can enter the heat source area, and the operation is simple and practical.

Preferably, the resin adsorption device 13 is filled with an adsorption resin, specifically an inexpensive macroporous resin with a selective adsorption function for phenolic substances, so as to achieve the goals of low cost, low energy consumption, and high utilization rate.

A kind of phenol recovery and resin regeneration system in the coal chemical industry wastewater of the present utility model specifically comprises the following steps when in use:

(1) Coal chemical industry wastewater is sent from the wastewater inlet pipe 1 to the wastewater pool 2 for buffer storage;

(2) The waste water entering the waste water pool 2 enters the heat source area 4 of the distillation separation device through the water inlet pipe 3 of the distillation separation device by gravity to provide a heat source for the distillation separation of the subsequent methanol and phenol mixture;

(3) After the waste water in the heat source area 4 of the distillation separation device is full, the waste liquid outlet at the bottom of the heat source area 4 is passed through the waste water outlet pipe 8 into the resin adsorption device 13, and the phenol in the coal chemical industry waste water is adsorbed by the adsorption resin;

(4) After the coal chemical industry wastewater is adsorbed, it enters the subsequent treatment process through the outlet pipe 14 below the resin adsorption device 13 .

(5) After the adsorption resin in the resin adsorption device 13 reaches adsorption saturation, the methanol regeneration liquid in the methanol regeneration liquid tank 11 is transported to the resin adsorption device 13 for resin regeneration to obtain a resin regeneration mixed liquid.

(6) The resin regeneration mixed solution is a mixed solution containing methanol and phenol adsorbed by the resin, and the mixed solution is transported to the separation zone 5 of the distillation separation device through the lift pump 10 for distillation and separation.

(7) The phenol after distillation and separation is recovered by the phenol collector 7, the methanol vapor is recovered and cooled by the regeneration liquid recovery device 15, and the regeneration liquid is input into the methanol regeneration liquid tank 11 for storage.

Through the above steps, the selective adsorption and recovery of phenol in coal chemical wastewater can be realized, which truly reflects low cost, low cost, low energy consumption, high recycling rate, high treatment efficiency, short cycle, less land occupation, simple operation and safety. The advantage of no pollution.

Claims (9)

1. The utility model provides a phenol is retrieved and resin regeneration system among coal chemical industry waste water which characterized in that specifically includes: the device comprises a wastewater pool (2), a distillation separation device, a phenol collector (7), a methanol regeneration liquid tank (11), a resin adsorption device (13) and a regeneration liquid recovery device (15), wherein a wastewater inlet of the distillation separation device is communicated with a liquid outlet of the wastewater pool (2), a wastewater outlet of the distillation separation device is communicated with an inlet of the resin adsorption device (13), a mixed liquid inlet of the distillation separation device is communicated with an outlet of the resin adsorption device (13), a phenol outlet of the distillation separation device is communicated with an inlet of the phenol collector (7), a steam outlet of the distillation separation device is connected with a steam inlet of the regeneration liquid recovery device (15), a regeneration liquid outlet of the regeneration liquid recovery device (15) is connected with an inlet of the methanol regeneration liquid tank (11), an outlet of the methanol regeneration liquid tank (11) is communicated with an inlet of the resin adsorption device (13), a heat source area (4) and a separation area (5) are arranged in the distillation separation device, the heat source area (4) is provided with the distillation separation device, the center of the interior of the distillation separation device is used for containing coal chemical wastewater, the separation area (5) is formed by a gap between the inner wall of the distillation separation device and the heat source area (4), and the separation area (5) is used for providing separation conditions for high-temperature separation of methanol and phenol.

2. The system for recovering phenol and regenerating resin in coal chemical industry wastewater as claimed in claim 1, wherein an electric heating plate (6) is further arranged in the distillation separation device, and the electric heating plate (6) is arranged on the inner wall of the distillation separation device and is used for providing a heat source for the separation zone (5).

3. The system for recovering phenol and regenerating resin from coal chemical industry wastewater as claimed in claim 1, wherein the heat source zone (4) is a conical cylinder with a bottom diameter smaller than that of the distillation separation device and made of copper, an inlet at the top of the heat source zone (4) is communicated with a liquid outlet of the wastewater pool (2), and an outlet at the bottom of the heat source zone (4) is communicated with an inlet of the resin adsorption device (13) through a wastewater outlet pipe (8).

4. The system for recovering phenol and regenerating resin in coal chemical industry wastewater as claimed in claim 1, wherein the mixed liquid inlet of the distillation separation device is arranged on the side wall of the distillation separation device at the upper part of the heat source area (4).

5. The system for recovering phenol and regenerating resin in coal chemical industry wastewater as claimed in claim 1, wherein the bottom of the separation zone (5) is provided with a phenol outlet, and the phenol outlet is communicated with the inlet of the phenol collector (7).

6. The system for recovering phenol and regenerating resin in coal chemical industry wastewater as claimed in claim 1, wherein the resin adsorption device (13) is filled with macroporous adsorption resin.

7. The system for recovering phenol and regenerating resin in coal chemical industry wastewater as claimed in claim 1, wherein the liquid inlet of the wastewater tank (2) is higher than the liquid outlet of the wastewater tank (2).

8. The system for recovering phenol and regenerating resin in coal chemical industry wastewater as claimed in claim 1, wherein the outlet of the resin adsorption device (13) is communicated with the lift pump (10) through a mixed liquid inlet pipe (9), and the lift pump (10) is used for injecting the mixed liquid in the resin adsorption device (13) into the separation zone (5) of the distillation separation device.

9. The system for recovering phenol and regenerating resin in coal chemical industry wastewater as claimed in claim 1, wherein the steam outlet of the distillation separation device is communicated with the inlet of the regeneration liquid recovery device (15) through a regeneration heat collecting pipe (16), and the regeneration liquid recovery device (15) is used for standing and cooling regenerated methanol.

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