CN219441259U

CN219441259U - Membrane filtration method catalyst recovery device in wet oxidation process

Info

Publication number: CN219441259U
Application number: CN202320146445.5U
Authority: CN
Inventors: 王志磊; 成洪渠; 董红波; 胡海峰; 李岩山; 马立文; 薛健; 王远建; 王子源; 孟青峰
Original assignee: BEFAR GROUP CO LTD; Binhua Technology Co ltd
Current assignee: BEFAR GROUP CO LTD; Binhua Technology Co ltd
Priority date: 2023-02-08
Filing date: 2023-02-08
Publication date: 2023-08-01
Anticipated expiration: 2033-02-08

Abstract

The utility model relates to a membrane filtration catalyst recovery device in a wet oxidation process, which comprises a membrane filter shell arranged outside, and further comprises a feed inlet, a filter membrane component, a backflushing tank and a backflushing port, wherein the feed inlet is arranged on one side of the bottom of the membrane filter shell, the filter membrane component is embedded and installed at the top of the membrane filter shell, a clear liquid discharge port is arranged on one side of the top of the membrane filter shell, and an overflow port is arranged on one side of the feed inlet.

Description

Membrane filtration method catalyst recovery device in wet oxidation process

Technical Field

The utility model relates to the field of wet oxidation catalyst recovery, in particular to a membrane filtration catalyst recovery device in a wet oxidation process.

Background

In the current high-temperature oxidized brine operation, the Fenton reaction principle is mainly adopted to treat organic matters in the wastewater, and the Fenton reaction catalyst needs to be recycled in order to save the cost. The oxidized brine contains 500-5000ppm of catalyst ions, and the catalyst in the brine solution is recovered by adopting a method of precipitation, adsorption of clear liquid by chelating resin, separation of turbid liquid by a centrifuge and redissolution of the catalyst, and meanwhile, the purpose of refining the clear liquid is realized. The process realizes the recovery of copper ions in brine and the purification of copper ions in refined brine through the combination of three steps. Adding a flocculating agent to settle in an alkaline environment, so that brine and copper hydroxide settle in a catalyst settling tank; the second step is that the chelate resin adsorbs low-concentration copper ions in the supernatant fluid of the sedimentation tank, the low-concentration copper ions in the supernatant fluid of the sedimentation tank acidizes the brine by adjusting the pH value of the brine to ensure the ionic state of the copper ions, and then the chelate resin is utilized for adsorption interception to realize the refining of the brine and the regeneration treatment after the resin is saturated; and thirdly, separating the settled turbid liquid by using a high-rotation-speed horizontal spiral centrifugal machine, and dissolving the precipitate after centrifugation by using acid and then using the precipitate in a wet oxidation reactor. In actual operation, the process mainly has the following defects:

in order to achieve the sedimentation effect, various factors such as the concentration of a flocculating agent, the treatment capacity of a system, the pH value of materials, the temperature of the materials, the salt content of a solution and the like are required to be considered, so that the operation difficulty is high; in the centrifugal separation process, the change of the concentration of the catalyst system is caused by the change of the centrifugal separation effect caused by the change of the sedimentation concentration, the load change of the centrifugal machine and the like; the chelate resin has higher requirement on the pH value, and alkaline sedimentation clear liquid can cause great difficulty in controlling the pH value in the clear liquid acidification process due to the change of the copper hydroxide content, and is easy to cause fluctuation, thereby causing the exceeding of the metal ion content of the refined brine. Meanwhile, the content of copper ions in the settled clear liquid is higher, the saturation period of the chelate resin is shorter, and the chelate resin needs to be frequently regenerated, so that the material consumption and index fluctuation are caused.

In addition, in the sedimentation process, more flocculating agent wraps the sediment and is easy to accumulate in the catalyst, scale is formed in pipelines of storage tanks and conveying equipment of the catalyst system, and the pipelines are blocked and the equipment is in failure. The flocculating agent in the settled clear liquid can also cause blockage of resin pore channels in the chelating resin tower and hardening of a resin bed, so that pressure drop is increased, adsorption capacity is reduced, resin tower flux and adsorption capacity are reduced, regeneration is incomplete due to hardening, bridging is caused due to agglomeration, and bias flow and short circuit of the resin bed are caused. Severely restricts brine treatment load and index stability.

Natural settling is limited by the settling rate, the concentration of settled catalyst is low, and the high temperature oxidation system needs to maintain a certain amount of catalyst concentration, so that a larger amount of catalyst solution needs to be added, and the treatment capacity of the system on organic wastewater is reduced.

Disclosure of Invention

In view of the above, in order to overcome the defects in the prior art, the present utility model provides a catalyst recovery device for a membrane filtration method in a wet oxidation process, which effectively solves the problems mentioned in the background of the art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model comprises a membrane filter shell arranged outside, and further comprises a feed inlet, a filter membrane component, a clear liquid discharge hole, an overflow hole, a first looper flange, a connecting pipe, a second looper flange, a backflushing tank and a backflushing hole, wherein the feed inlet is arranged on one side of the bottom of the membrane filter shell;

the filter membrane component comprises a mounting plate, mounting holes, a cylindrical filter membrane and a back flushing port, wherein a plurality of mounting holes are formed in the mounting plate, and the cylindrical filter membrane is arranged in the mounting holes.

Preferably, the cylindrical filtration membrane is a micron-sized e-PTFE membrane.

Preferably, a residue discharge outlet is arranged at the bottom end of the membrane filter shell, and a residue discharge valve is arranged on the residue discharge outlet.

Preferably, lifting lugs are arranged around the middle part of the membrane filter shell.

Preferably, a pressure gauge is mounted on one side of the top of the membrane filter housing.

Preferably, the mounting plate is of a disc-shaped structure.

The beneficial effects are that: the utility model has novel structure and ingenious conception, and after the filtering membrane system is put into use, the oxidized brine is only required to be regulated into alkaline solution, so that the catalyst forms insoluble matters, and then the catalyst can be recovered through one step of membrane filtration. The insoluble catalyst is deposited and blocked outside the membrane, after the filter cake is formed, the filter cake falls off from the surface of the membrane after backflushing, the fallen filter cake can be quickly settled at the bottom of the cone of the filter because of heavier unit mass, and the deposit returns to the catalyst tank through opening a slag discharging valve at the bottom of the cone, and the oxidation reactor can be used after acid is added for dissolution. The catalyst is recovered by the method, a flocculating agent is not required to be added, the catalyst penetration in a precipitation form can be effectively blocked due to the small membrane pore diameter, the catalyst ions penetrating through the catalyst are ppb level, the index requirement is met, and the catalyst can directly cross a chelating resin tower. Meanwhile, the membrane filter is designed with sequential control, the concentration of the catalyst at the bottom of the cone can be directly controlled by changing the filtering time, the backflushing period, the backflushing time and the like, and is far higher than the concentration of the catalyst obtained by natural sedimentation, so that all the defects of the catalyst recovered by the original process are overcome at one time, the membrane filtering method catalyst recovery system is put into use, the significance of improving the catalyst recovery of the high-temperature oxidation unit is great, considerable economic benefits can be generated, and the method has high popularization and application values.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a side view of the present utility model;

FIG. 3 is a schematic view of the internal structure of the membrane filter housing of the present utility model;

FIG. 4 is a top view of a filter membrane assembly of the present utility model;

reference numerals in the drawings: 1. a membrane filter housing; 2. a feed inlet; 3. a filter membrane assembly; 4. a clear liquid discharge port; 5. an overflow port; 6. a first looper flange; 7. a connecting pipe; 8. a second looper flange; 9. a recoil tank; 10. a mounting plate; 11. a mounting hole; 12. a cylindrical filtration membrane; 13. and (5) back flushing the mouth.

Detailed Description

The following describes embodiments of the present utility model in further detail with reference to FIGS. 1-4.

The first embodiment of the utility model is shown in fig. 1-4, the utility model provides a membrane filtration catalyst recovery device in a wet oxidation process, which comprises a membrane filter shell 1 arranged outside, a feed inlet 2, a filter membrane component 3, a clear liquid discharge port 4, an overflow port 5, a first looper flange 6, a connecting pipe 7, a second looper flange 8, a backflushing tank 9 and a backflushing port 13, wherein the feed inlet 2 is arranged on one side of the bottom of the membrane filter shell 1, the filter membrane component 3 is embedded and installed at the top of the membrane filter shell 1, the clear liquid discharge port 4 is arranged on one side of the top of the membrane filter shell 1, the overflow port 5 is arranged on one side of the feed inlet 2, the connecting pipe 7 is installed at one end of the overflow port 5 through the first looper flange 6, one end of the connecting pipe 7 is connected with the backflushing tank 9 through the second looper flange 8, and the backflushing port 13 is arranged on one side of the clear liquid discharge port 4;

the filter membrane component 3 comprises a mounting plate 10, mounting holes 11, a cylindrical filter membrane 12 and a back flushing port 13, wherein a plurality of mounting holes 11 are formed in the mounting plate 10, and the cylindrical filter membrane 12 is arranged in the mounting holes 11.

The cylindrical filtering membrane 12 adopts a micron-sized e-PTFE membrane, so that the cylindrical filtering membrane 12 has better filtering capability.

The bottom of the membrane filter shell 1 is provided with a residue discharge outlet, and a residue discharge valve is arranged on the residue discharge outlet, so that catalyst residues in the membrane filter shell 1 can be discharged conveniently.

Lifting lugs are arranged on the periphery of the middle part of the membrane filter shell 1, so that the membrane filter shell 1 can be lifted conveniently.

A pressure gauge is arranged on one side of the top of the membrane filter shell 1, so that the pressure in the membrane filter shell 1 can be conveniently monitored.

The mounting plate 10 is of a disc-shaped structure, so that the mounting plate 10 is convenient to mount and use.

Working principle: when the utility model is used, copper ions in brine are added and subtracted before a feed pump to generate copper hydroxide sediment, the feed pump is used for feeding the brine into the membrane filter shell 1 through the feed port 2, the brine entering the membrane filter shell 1 is filtered by the cylindrical filter membrane 12, the copper hydroxide sediment is adsorbed on the surface of the cylindrical filter membrane 12, clear liquid is discharged from the clear liquid discharge port 4 through the cylindrical filter membrane 12, filtered clear brine overflows to the connecting pipe 7 through the overflow port 5, enters the back flushing tank 9 through the connecting pipe 7, after a period of time, back flushing is carried out through the back flushing port 13, the copper hydroxide sediment filter cake on the cylindrical filter membrane 12 is flushed down, the flushed copper hydroxide sediment is freely deposited to the bottom of the membrane filter shell 1, is discharged from the slag discharging port at the bottom of the membrane filter shell 1 to be dissolved in the catalyst dissolving tank and then is recycled to the oxidation reactor for repeated use.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A membrane filtration catalyst recovery device in a wet oxidation process, comprising an externally arranged membrane filter housing (1), characterized in that: the novel filter comprises a filter body, and is characterized by further comprising a feed inlet (2), a filter membrane component (3), a clear liquid discharge hole (4), an overflow hole (5), a first looper flange (6), a connecting pipe (7), a second looper flange (8), a backflushing tank (9) and a backflushing hole (13), wherein the feed inlet (2) is arranged on one side of the bottom of the filter body (1), the filter membrane component (3) is embedded and installed at the top of the filter body (1), the clear liquid discharge hole (4) is arranged on one side of the top of the filter body (1), the overflow hole (5) is arranged on one side of the feed inlet (2), the connecting pipe (7) is arranged at one end of the overflow hole (5) through the first looper flange (6), the backflushing tank (9) is connected to one end of the connecting pipe (7) through the second looper flange (8), and the backflushing hole (13) is arranged on one side of the clear liquid discharge hole (4);

the filter membrane assembly (3) comprises a mounting plate (10), mounting holes (11), a cylindrical filter membrane (12) and a back flushing port (13), wherein a plurality of mounting holes (11) are formed in the mounting plate (10), and the cylindrical filter membrane (12) is arranged in the mounting holes (11).

2. A membrane filtration catalyst recovery device in a wet oxidation process according to claim 1, wherein the cylindrical filtration membrane (12) is a micron-sized e-PTFE membrane.

3. The membrane filtration catalyst recovery device in a wet oxidation process according to claim 1, wherein a residue discharge port is provided at the bottom end of the membrane filter housing (1), and a residue discharge valve is installed on the residue discharge port.

4. The membrane filtration catalyst recovery device in a wet oxidation process according to claim 1, wherein lifting lugs are arranged around the middle part of the membrane filter shell (1).

5. A membrane filtration catalyst recovery device in a wet oxidation process according to claim 1, wherein a pressure gauge is installed on one side of the top of the membrane filter housing (1).

6. A membrane filtration catalyst recovery device in a wet oxidation process according to claim 1, wherein the mounting plate (10) is of disc-like structure.