A high-efficiency purification treatment system and method combining column chromatography with membranes

Abstract

The present application relates to wastewater treatment technical field, particularly to a kind of column chromatography and membrane combined high-efficiency purification treatment system and processing method.Purification treatment system includes high-pressure membrane treatment system and column chromatography treatment system;High-pressure membrane treatment system includes high-pressure membrane transfer tank, high-pressure membrane transfer tank is introduced to high-pressure membrane filter device by high-pressure pipeline, and return to high-pressure membrane transfer tank;High-pressure membrane transfer tank is connected with second acid inlet pipeline by mother liquor pipeline, indirectly connected with APC column chromatography, the outlet of APC column chromatography is provided with reclaimed water pipeline and waste water pipeline and flushing pipeline, the first passage of APC column chromatography, i.e., entrance is provided with head acid pipeline, dilute acid pipeline and acid production pipeline;Head acid pipeline, dilute acid pipeline and concentrated waste water pipeline are connected to high-pressure membrane transfer tank, acid production pipeline is connected to acid production tank, waste water pipeline is connected to sewage tank, reclaimed water pipeline is connected to reclaimed water tank, and reclaimed water tank is connected to flushing pipeline by pipeline.The system is combined by high-pressure membrane treatment system and column chromatography treatment system, improves the treatment efficiency of acid-containing wastewater, reduces the use amount of pure water, and reduces the processing cost.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a highly efficient purification system and method combining column chromatography and membrane chromatography. Background Technology

[0002] Acidic wastewater is one of the most frequently generated types of wastewater in the chemical industry. Direct discharge of large quantities of acidic wastewater generated during production will cause significant environmental pollution. Therefore, it is necessary to purify acidic wastewater to meet discharge standards before it can be released.

[0003] Furthermore, to reduce the cost of purifying acidic wastewater, the acids in the wastewater need to be recovered and treated as much as possible. Column chromatography and high-pressure membrane chromatography are the main treatment methods for acidic wastewater. In actual wastewater treatment processes, since high-pressure membrane chromatography is mainly suitable for treating low-concentration acidic wastewater, while column chromatography is suitable for treating high-concentration acidic wastewater, using either method alone is not only impractical but also has low treatment efficiency.

[0004] Therefore, it is necessary to design an efficient wastewater treatment system for acidic wastewater in the chemical industry to improve the treatment efficiency of acidic wastewater while minimizing the treatment cost. Summary of the Invention

[0005] The purpose of this invention is to provide a highly efficient purification system and method combining column chromatography and membrane chromatography. This system can efficiently treat acidic wastewater, recover acids, and reduce the overall operating cost of the system.

[0006] Specifically, the present invention adopts the following technical solution: A high-efficiency purification system combining column chromatography and membrane technology, comprising a high-pressure membrane treatment system and a column chromatography treatment system; The high-pressure membrane treatment system includes a first acid inlet pipeline and a high-pressure membrane transfer tank connected to the first acid inlet pipeline. The high-pressure membrane transfer tank is introduced to the high-pressure membrane filtration device through the high-pressure pipeline. The filtrate of the high-pressure membrane filtration device is connected to the acid production tank, and the filter material is returned to the high-pressure membrane transfer tank through the pipeline. The column chromatography system includes a second acid inlet line and an APC column chromatography system connected to the second acid inlet line. The second acid inlet line is introduced into the first channel of the APC column chromatography system. Correspondingly, a reclaimed water line and a wastewater line are connected in parallel to the second channel of the APC column chromatography system. A flushing line is also connected in parallel to the second channel of the APC column chromatography system. Correspondingly, a de-acid line, a dilute acid line, and an acid production line are connected in parallel to the second acid inlet line at the first channel of the APC column chromatography system. The high-pressure membrane transfer tank is connected to the second acid inlet pipeline via the mother liquor pipeline; The de-acid pipeline and dilute acid pipeline are connected to the high-pressure membrane transfer tank, the acid production pipeline is connected to the acid production tank, the wastewater pipeline is connected to the sewage tank, the recycled water pipeline is connected to the recycled water tank, and the recycled water tank is connected to the flushing pipeline through a pipeline.

[0007] Preferably, a high-pressure pump is installed on the high-pressure pipeline.

[0008] Preferably, the first acid inlet pipeline is equipped with a first feed pump, a first acid inlet valve and a first flow meter.

[0009] Preferably, the second acid inlet pipeline is equipped with a second feed pump, a second acid inlet valve, and a second flow meter.

[0010] Preferably, the flushing pipeline is equipped with a flushing pump and a third flow meter.

[0011] Preferably, one-way valves are installed on the first acid inlet pipeline, the second acid inlet pipeline, and the flushing pipeline.

[0012] As a preferred option, at least one control valve is installed on the first acid inlet pipeline and the second acid inlet pipeline as needed.

[0013] A purification treatment method based on the aforementioned system, characterized by comprising the following steps: Step 1: Start the first feed pump. The raw acid is added to the high-pressure membrane transfer tank through the first feed pump and the first acid inlet pipeline. When the first flow meter reaches the preset value, turn off the first feed pump and stop the first acid inlet pipeline from feeding acid into the high-pressure membrane transfer tank. Step 2: Start the high-pressure pump. The liquid in the high-pressure membrane transfer tank is led to the high-pressure membrane filter through the high-pressure pipeline by the high-pressure pump. The product is qualified acid, which flows into the acid production tank. The filtered material is returned to the high-pressure membrane transfer tank. Step 3: When the liquid level in the high-pressure membrane transfer tank drops to the set value L1, the high-pressure pump stops running. The feed liquid in the high-pressure membrane transfer tank enters the APC column chromatography through the second feed pump, the mother liquor pipeline, and the second acid inlet pipeline, and is discharged into the reclaimed water tank through the reclaimed water pipeline. Step 4: Once the liquid level in the high-pressure membrane transfer tank drops from L1 to L2, close the mother liquor pipeline, open the second acid inlet valve, and the raw acid enters the APC column chromatography through the second feed pump and the second acid inlet pipeline, and is discharged into the recycled water tank through the recycled water pipeline. Step 5: When the second flow meter reaches the first set value, close the reclaimed water pipeline and open the wastewater pipeline to discharge the liquid wastewater to the sewage treatment plant for further treatment. Step 6: The feed solution from the recycled water tank is pumped through the rear half of the flushing pipeline into the second channel of the APC column chromatography, and discharged into the high-pressure membrane transfer tank through the de-acid pipeline. Step 7: When the third flow meter reaches the first preset value, close the connection pipeline of the recycled water tank, open the entire flushing pipeline, and pure water enters the second channel of APC column chromatography through the flushing pump and the flushing pipeline, and is discharged to the high-pressure membrane transfer tank through the de-acid pipeline. Step 8: When the third flow meter reaches the second preset value, close the de-acid pipeline and open the acid production pipeline. The liquid is discharged to the acid production tank through the acid production pipeline. Step 9: When the third flow meter reaches the third preset value, close the acid production pipeline and open the dilute acid pipeline. The liquid is discharged to the high-pressure membrane transfer tank through the dilute acid pipeline. Step 10: When the third flow meter reaches the fourth preset value, turn off the flushing pump; Step 11: Repeat the above steps.

[0014] The above method involves initially filtering acidic wastewater through a high-pressure membrane to obtain acid that meets the standards. Then, wastewater with higher concentrations is separated by column chromatography. The column chromatography is cleaned by periodically flushing the pipeline, and the cleaning water is fully utilized in the entire wastewater treatment process, thereby improving the overall treatment efficiency and saving the amount of pure water used.

[0015] Compared with the prior art, the beneficial effects of the present invention are: Combining high-pressure membrane treatment and column chromatography treatment utilizes the advantages of both, greatly improving the treatment efficiency of acidic wastewater. It reduced the amount of pure water used for acidic wastewater, thus lowering water costs; The acid in the acidic wastewater was recovered and treated. At the same time, the acid-free wastewater that meets the standards was discharged to the sewage treatment plant for conventional sewage treatment. Attached Figure Description

[0016] Figure 1 The diagram shown is a structural schematic of the present invention.

[0017] In the diagram: 100 High-pressure membrane treatment system, 101 First acid inlet pipeline, 102 High-pressure membrane transfer tank, 103 High-pressure membrane filter device, 104 Mother liquor pipeline, 105 High-pressure pump, 106 First feed pump, 107 First acid inlet valve, 108 First flow meter. 200 Column chromatography processing system; 201 Second acid inlet line; 202 APC column chromatography; 203 Recycled water line; 205 Wastewater line; 206 Flushing line; 207 Headed acid removal line; 208 Dilute acid line; 209 Acid production line; 210 Recycled water tank; 211 Second feed pump; 212 Second acid inlet valve; 213 Second flow meter; 214 Flushing pump; 215 Third flow meter. 301 Check Valve, 302 Control Valve. Detailed Implementation

[0018] The representative embodiments shown in the accompanying drawings will now be further refined. It should be understood that the following description is not intended to limit the embodiments to a single preferred embodiment. Rather, it is intended to cover alternatives, modifications, and equivalents that may be included within the substance and scope of the embodiments defined by the appended claims.

[0019] Our company provides a high-efficiency purification system that combines column chromatography and membrane technology to improve the treatment efficiency of acidic wastewater while reducing treatment costs.

[0020] The purification system includes a high-pressure membrane treatment system 100 and a column chromatography treatment system 200.

[0021] The high-pressure membrane treatment system 100 includes a first acid inlet pipeline 101 and a high-pressure membrane transfer tank 102 connected to the first acid inlet pipeline 101. The high-pressure membrane transfer tank 102 is connected to a high-pressure membrane filter device 103 via a high-pressure pipeline. A high-pressure pump 105 is installed on the high-pressure pipeline. The filtrate from the high-pressure membrane filter device 103 is connected to an acid production tank, and the filtered material is returned to the high-pressure membrane transfer tank 102 via a pipeline. The first acid inlet pipeline 101 is equipped with a first feed pump 106, a first acid inlet valve 107, and a first flow meter 108. Meanwhile, one-way valves 301 are installed on the first acid inlet pipeline 101, the second acid inlet pipeline 201, and the flushing pipeline 206.

[0022] The column chromatography system 200 includes a second acid inlet line 201 and an APC column chromatography system 202 connected to the second acid inlet line 201. The second acid inlet line 201 is equipped with a second feed pump 211, a second acid inlet valve 212, and a second flow meter 213. The second acid inlet line 201 leads into the first channel of the APC column chromatography system 202. Correspondingly, a reclaimed water line 203 and a wastewater line 205 are connected in parallel to the second channel of the APC column chromatography system 202. A flushing line 206 is also connected in parallel to the second channel of the APC column chromatography system 202, and the flushing line 206 is equipped with a flushing pump 214 and a third flow meter 215. Correspondingly, a de-acid line 207, a dilute acid line 208, and an acid production line 209 are connected in parallel to the second acid inlet line 201 at the first channel of the APC column chromatography system 202.

[0023] Regarding the overall system loop, the high-pressure membrane transfer tank 102 is connected to the second acid inlet pipe 201 through the mother liquor pipe 104; the de-acid pipe 207 and the dilute acid pipe 208 are connected to the high-pressure membrane transfer tank 102; the acid production pipe 209 is connected to the acid production tank; the medium wastewater pipe 205 is connected to the sewage tank; the recycled water pipe 203 is connected to the recycled water tank 210; and the recycled water tank 210 is connected to the flushing pipe 206 through a pipe.

[0024] At least one control valve 302 is installed on the first acid inlet pipeline 101 and the second acid inlet pipeline 201 as needed.

[0025] Based on the above purification system, the specific treatment method includes the following steps: Step 1: Start the first feed pump 106. The raw acid is added to the high-pressure membrane transfer tank 102 through the first feed pump 106 and the first acid inlet pipeline 101. When the first flow meter 108 reaches the preset value, the first feed pump 106 is turned off and the first acid inlet pipeline 101 stops feeding acid into the high-pressure membrane transfer tank 102. Step 2: Start the high-pressure pump 105. The liquid in the high-pressure membrane transfer tank 102 is led to the high-pressure membrane filter device 103 through the high-pressure pipeline via the high-pressure pump 105. The product is qualified acid, which flows into the acid production tank. The filtered material is returned to the high-pressure membrane transfer tank 102. Step 3: Once the liquid level in the high-pressure membrane transfer tank 102 drops to the set value L1, the high-pressure pump 105 stops operating. The feed liquid in the high-pressure membrane transfer tank 102 enters the APC column chromatography 202 through the second feed pump 211, the mother liquor pipeline 104, and the latter half of the second acid inlet pipeline 201, and is discharged into the reclaimed water tank 210 through the reclaimed water pipeline 203. The concentrated acid solution is reused in the column chromatography, thereby improving the acid recovery rate. Step 4: Once the liquid level in the high-pressure membrane transfer tank 102 drops from L1 to L2, close the mother liquor pipeline 104, open the second acid inlet valve 212, and the raw acid enters the APC column chromatography 202 through the second feed pump 211 and the second acid inlet pipeline 201, and is discharged into the recycled water tank 210 through the recycled water pipeline 203; the recycled water is recovered, thereby reducing the amount of wastewater discharged. Step 5: When the second flow meter 213 reaches the first set value, close the recycled water pipeline 203 and open the wastewater pipeline 205. The liquid wastewater is discharged to the sewage treatment plant for further treatment. Recoverable acid in the recycled water is further recovered, and unrecoverable wastewater is discharged to achieve energy saving and emission reduction. Step 6: The feed solution from the recycled water tank 210 is fed through the flushing pump 214 and the rear half of the flushing pipeline 206 into the second channel of the APC column chromatography 202, and discharged to the high-pressure membrane transfer tank 102 through the headless acid pipeline 207; thereby improving the acid recovery rate. Step 7: When the third flow meter 215 reaches the first preset value, close the connection pipeline of the return water tank 210, open the entire flushing pipeline 206, and pure water enters the second channel of APC column chromatography 202 through the flushing pump 214 and the flushing pipeline 206, and is discharged to the high-pressure membrane transfer tank 102 through the de-acid pipeline 207; to improve the acid recovery rate. Step 8: When the third flow meter 215 reaches the second preset value, close the de-acid pipeline 207 and open the acid production pipeline 209. The liquid is discharged to the acid production tank through the acid production pipeline 209. Step 9: When the third flow meter 215 reaches the third preset value, close the acid production pipeline 209 and open the dilute acid pipeline 208. The liquid is discharged to the high-pressure membrane transfer tank 102 through the dilute acid pipeline 208 to improve the acid recovery rate. Step 10: When the third flow meter 215 reaches the fourth preset value, turn off the flushing pump 214; Step 11: Repeat the above steps.

[0026] The treatment method based on the above system combines high-pressure membrane treatment and column chromatography to form a complete closed loop. By combining the advantages of both, acidic wastewater is initially treated, some acid is recovered, and the acid-removed wastewater is discharged to a wastewater treatment plant for further treatment. This combination creates a semi-continuous operating state for acidic wastewater treatment, improving the efficiency of wastewater removal. Simultaneously, the entire treatment process maximizes the utilization of acidic wastewater, reducing the use of pure water and saving significant amounts of water, thus lowering wastewater treatment costs.

[0027] It will be apparent to those skilled in the art that modifications, combinations, and variations can be made to the teachings described above.

Claims

1. A high-efficiency purification system combining column chromatography and membrane chromatography, characterized in that: Includes a high-pressure membrane processing system (100) and a column chromatography processing system (200). The high-pressure membrane treatment system (100) includes a first acid inlet pipeline (101) and a high-pressure membrane transfer tank (102) connected to the first acid inlet pipeline (101). The high-pressure membrane transfer tank (102) is introduced to the high-pressure membrane filter device (103) through the high-pressure pipeline. The filtrate of the high-pressure membrane filter device (103) is connected to the acid production tank, and the filter material is returned to the high-pressure membrane transfer tank (102) through the pipeline. The column chromatography processing system (200) includes a second acid inlet pipeline (201) and an APC column chromatography (202) connected by the second acid inlet pipeline (201). The second acid inlet pipeline (201) is introduced into the first channel of the APC column chromatography (202). Correspondingly, a water return pipeline (203) and a wastewater pipeline (205) are connected in parallel to the second channel of the APC column chromatography (202). The second channel of the APC column chromatography (202) is also connected in parallel to a flushing pipeline (206). Correspondingly, a de-acid pipeline (207), a dilute acid pipeline (208), and an acid production pipeline (209) are connected in parallel to the first channel of the APC column chromatography (202) and the second acid inlet pipeline (201). The high-pressure membrane transfer tank (102) is connected to the second acid inlet pipeline (201) through the mother liquor pipeline (104). The de-acid pipeline (207) and the dilute acid pipeline (208) are connected to the high-pressure membrane transfer tank (102), the acid production pipeline (209) is connected to the acid production tank, the wastewater pipeline (205) is connected to the sewage tank, the recycled water pipeline (203) is connected to the recycled water tank (210), and the recycled water tank (210) is connected to the flushing pipeline (206) through a pipeline; A high-pressure pump (105) is installed on the high-pressure pipeline. The first acid inlet pipeline (101) is equipped with a first feed pump (106), a first acid inlet valve (107) and a first flow meter (108). The second acid inlet pipeline (201) is equipped with a second feed pump (211), a second acid inlet valve (212), and a second flow meter (213). The flushing pipeline (206) is equipped with a flushing pump (214) and a third flow meter (215); One-way valves (301) are installed on the first acid inlet pipeline (101), the second acid inlet pipeline (201), and the flushing pipeline (206). At least one control valve (302) is installed on the first acid inlet pipeline (101) and the second acid inlet pipeline (201) as needed.

2. A purification treatment method based on the system according to any one of claims 1, characterized in that: Includes the following steps: Step 1: Start the first feed pump (106), and the raw acid is added to the high-pressure membrane transfer tank (102) through the first feed pump (106) and the first acid inlet pipeline (101); when the first flow meter (108) reaches the preset value, shut down the first feed pump (106), and the first acid inlet pipeline (101) stops feeding acid into the high-pressure membrane transfer tank (102); Step 2: Start the high pressure pump (105). The liquid in the high pressure membrane transfer tank (102) is led to the high pressure membrane filter device (103) through the high pressure pipeline via the high pressure pump (105). The product is qualified acid, which flows into the acid production tank. The filtered material is returned to the high pressure membrane transfer tank (102). Step 3: When the liquid level in the high-pressure membrane transfer tank (102) drops to the set value L1, the high-pressure pump (105) stops running. The feed liquid in the high-pressure membrane transfer tank (102) enters the APC column chromatography (202) through the second feed pump (211), the mother liquor pipeline (104), and the second acid inlet pipeline (201), and is discharged into the reclaimed water tank (210) through the reclaimed water pipeline (203). Step 4: Once the liquid level in the high-pressure membrane transfer tank (102) drops from L1 to L2, close the mother liquor pipeline (104), open the second acid inlet valve (212), and the raw acid enters the APC column chromatography (202) through the second feed pump (211) and the second acid inlet pipeline (201), and is discharged into the reclaimed water tank (210) through the reclaimed water pipeline (203); Step 5: When the second flow meter (213) reaches the first set value, close the return water pipeline (203) and open the wastewater pipeline (205) to discharge the liquid wastewater to the sewage station for further treatment; Step 6: The feed liquid in the recycled water tank (210) is fed into the second channel of the APC column chromatography (202) through the back half of the flushing pipeline (206) via the flushing pump (214), and discharged to the high-pressure membrane transfer tank (102) through the de-acid pipeline (207). Step 7: When the third flow meter (215) reaches the first preset value, close the connection pipeline of the return water tank (210), open the entire flushing pipeline (206), and pure water enters the second channel of APC column chromatography (202) through the flushing pump (214) and the flushing pipeline (206), and is discharged to the high pressure membrane transfer tank (102) through the de-acid pipeline (207). Step 8: When the third flow meter (215) reaches the second preset value, close the de-acid pipeline (207) and open the acid production pipeline (209). The liquid is discharged to the acid production tank through the acid production pipeline (209). Step 9: When the third flow meter (215) reaches the third preset value, close the acid production pipeline (209) and open the dilute acid pipeline (208). The liquid is discharged to the high-pressure membrane transfer tank (102) through the dilute acid pipeline (208). Step 10: When the third flow meter (215) reaches the fourth preset value, turn off the flushing pump (214). Step 11: Repeat the above steps.

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