Treatment system and treatment method for kerosene chemical high-salinity wastewater organic matters

Abstract

The invention provides a kerosene chemical high-salinity wastewater organic matter treatment system and a treatment method thereof. The treatment system comprises a pretreatment tank, a coagulative precipitation tank, a biochemical treatment tank, a circulating oxidation tank and an ozone oxidation tank which are sequentially arranged, wherein the biochemical treatment tank comprises a hydrolysis tank and an aeration tank, a hydrolysis tank water inlet is formed in the top of the hydrolysis tank, a biochemical treatment tank water outlet is formed in the bottom of the aeration tank, and an aeration device is arranged in the aeration tank; the circulating oxidation pond comprises a high-density sedimentation pond, a filter pond and a reverse osmosis pond, the high-density sedimentation pond is located above the filter pond and the reverse osmosis pond, a circulating water inlet and a circulating oxidation pond water inlet are formed in the top of the high-density sedimentation pond, and the circulating oxidation pond water inlet is connected with the biochemical treatment pond water outlet. The treatment device disclosed by the invention can well solve the problem that organic matters in the high-salinity wastewater are difficult to degrade and remove, so that the pressure of a subsequent treatment process unit is reduced.

Description

Technical Field

[0001] With the development of economy and population growth, water shortage and water pollution are becoming more and more serious. Among them, high-salinity and hard-to-degrade organic wastewater from coal chemical industry has become a major problem in the field of industrial wastewater treatment. Coal chemical wastewater contains a large amount of salt, suspended solids, heavy metals and hard-to-degrade organic matter, which have caused great harm to the environment and ecology. Therefore, how to effectively treat high-salinity and hard-to-degrade organic wastewater from coal chemical industry has become a problem that needs to be solved urgently.

[0002] High-salinity and difficult-to-degrade organic wastewater from coal chemical industry mainly comes from processes such as coal coking, coal gasification, and coal liquefaction. The wastewater generated in these processes has complex components and contains a large amount of salt, heavy metals, and difficult-to-degrade organic matter, such as phenol, cyanide, sulfide, etc. In addition, the wastewater also contains a large amount of suspended matter and oil substances, which brings great difficulties to treatment.

[0003] At present, the treatment methods for high-salinity and difficult-to-degrade organic wastewater in coal chemical industry mainly include physical, chemical and biological methods. Physical methods mainly include precipitation, filtration, adsorption, etc., chemical methods include coagulation, oxidation, reduction, etc., and biological methods use the metabolism of microorganisms to degrade organic matter. However, these methods have certain limitations and shortcomings in practical applications. For example, physical methods cannot remove salt and heavy metals in wastewater, chemical methods may cause secondary pollution, and biological methods require specific microbial populations and suitable environmental conditions.

[0004] Coal chemical wastewater requires "zero discharge". However, the refractory organic matter in the production wastewater cannot be removed well, and the COD content is high, which has a great impact on the subsequent membrane process equipment, thereby affecting the service life of the equipment, increasing the replacement frequency of the membrane system, and increasing the operating cost. Therefore, the development of an effective and economical advanced oxidation technology has become the focus of current research.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The first purpose of the present invention is to provide a system for treating organic matter in high-salt wastewater from kerosene chemical industry, which can effectively solve the problem that organic matter in high-salt wastewater is difficult to degrade and remove, reduce the pressure of subsequent treatment process units, reduce the frequency of fouling and blockage of subsequent membrane systems and evaporation systems, reduce operating costs, and increase equipment service life, providing a solid foundation for ensuring stable operation of the system.

[0007] The second purpose of the present invention is to provide a method for treating organic matter in high-salt wastewater from kerosene chemical industry. The system optimizes the process flow of sewage treatment, integrates multiple water treatment modules, and forms a complete, efficient and environmentally friendly wastewater treatment system through efficient wastewater treatment methods, thereby effectively improving the sewage treatment efficiency.

[0008] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are particularly adopted: A system for treating organic matter in high-salt wastewater of kerosene chemical industry comprises a pretreatment tank, a coagulation sedimentation tank, a biochemical treatment tank, a circulating oxidation tank and an ozone oxidation tank which are arranged in sequence; wherein the biochemical treatment tank comprises a hydrolysis tank and an aeration tank, the top of the hydrolysis tank is provided with a hydrolysis tank water inlet, the bottom of the aeration tank is provided with a biochemical treatment tank water outlet, and the aeration tank is provided with an aeration device; the circulating oxidation tank comprises a high-density sedimentation tank, a filter tank and a reverse osmosis tank, the high-density sedimentation tank is located above the filter tank and the reverse osmosis tank, the top of the high-density sedimentation tank is provided with a circulating water inlet and a circulating oxidation tank water inlet, and the circulating oxidation tank water inlet is connected to the biochemical treatment tank water outlet.

[0009] Preferably, as a further implementable solution, the height of the hydrolysis tank is 1.5m-2m higher than the height of the aeration tank, and the hydrolysis tank adopts a folded plate anaerobic hydrolysis tank.

[0010] In the present invention, the high-salt wastewater generated by the kerosene chemical industry is mainly combined with a biochemical treatment tank and a circulating oxidation tank, so that the high-salt wastewater generated by the kerosene chemical industry can better remove the difficult-to-degrade organic matter, and reduce the COD content, reduce the pressure of the subsequent treatment process, reduce the frequency of subsequent membrane system and evaporation system fouling, reduce operating costs, and increase the service life of the equipment, providing a solid foundation for ensuring the stable operation of the system. The biochemical treatment tank includes a hydrolysis tank and an aeration tank, wherein the hydrolysis tank adopts a folding plate anaerobic hydrolysis tank, and the wastewater is hydrolyzed and acidified by the hydrolysis tank to decompose some extremely difficult-to-degrade substances into small molecules, thereby being able to well reduce the COD content in the wastewater. Subsequently, since the height of the hydrolysis tank is 1.5m-2m higher than that of the aeration tank, due to the height difference between the two, the wastewater in the hydrolysis tank spontaneously flows into the aeration tank due to its own gravity, and the aeration device arranged in the aeration tank aerates the wastewater after the oxygen is blown off in the hydrolysis tank to avoid affecting the subsequent wastewater treatment due to lack of oxygen; then the wastewater treated in the biochemical treatment tank will flow The wastewater enters the high-density sedimentation tank in the circulating oxidation tank, and flocculants, calcium oxide, magnesium oxide, sodium hydroxide, sodium aluminate and sodium carbonate are added through multiple dosing systems arranged in the high-density sedimentation tank. The suspended solids, turbidity, total hardness, total silicon and other substances in the wastewater are removed through a variety of agents. Then, the flocculated and precipitated substances in the wastewater are filtered through the filter tank. After the filtration is completed, it can flow into the reverse osmosis tank through the channel between the filter tank and the reverse osmosis tank. The wastewater is desalted through the reverse osmosis process. After desalination, it flows out of the circulating outlet arranged at the bottom of the reverse osmosis tank through the channel, and then flows into the circulating oxidation tank again through the circulating inlet arranged at the top of the high-density sedimentation tank for circulating oxidation treatment.

[0011] Preferably, as a further implementable solution, a multi-layer grid is provided between the high-density sedimentation tank and the filter tank, and a partition is provided between the high-density sedimentation tank and the reverse osmosis tank.

[0012] Preferably, as a further feasible solution, a plurality of dosing systems are arranged in the high-density sedimentation tank, and the plurality of dosing systems are evenly distributed at the bottom of the high-density sedimentation tank.

[0013] In the present invention, multiple dosing systems are arranged in the high-density sedimentation tank for re-dosing. By adding flocculants, calcium oxide, magnesium oxide, sodium hydroxide, sodium aluminate, and sodium carbonate, suspended solids, turbidity, total hardness, total silicon and other substances in the water are removed in the high-density sedimentation tank to meet the water inlet conditions of subsequent processes. A multi-layer grid is arranged between the high-density sedimentation tank and the filter tank, and a partition is arranged between the high-density sedimentation tank and the reverse osmosis tank. Therefore, after the wastewater is treated in the high-density sedimentation tank, since a multi-layer grid is arranged between the high-density sedimentation tank and the filter tank, and a partition is arranged between the high-density sedimentation tank and the reverse osmosis tank, the high-density The sedimentation tank and the filter tank are connected. The wastewater in the high-density sedimentation tank will flow into the filter tank through the multi-layer grilles instead of flowing into the reverse osmosis tank. The suspended solids and large particle impurities in the wastewater are initially removed through the multi-layer grilles set between the high-density sedimentation tank and the filter tank. Then, the impurities in the wastewater are further removed through filtration in the filter tank, and then the wastewater enters the reverse osmosis process for desalination and water reuse. After being treated in the reverse osmosis tank, the wastewater will flow out through the circulating outlet set at the bottom of the reverse osmosis tank, and then flow into the circulating oxidation tank through the circulating inlet set at the top of the high-density sedimentation tank for circulating treatment, so as to better remove substances in the wastewater.

[0014] Preferably, as a further feasible solution, the ozone oxidation tank is filled with an ozone catalyst.

[0015] After being treated in the circulating oxidation pool, the wastewater will flow into the ozone oxidation pool, where the hydroxyl radicals formed by ozone under the action of a high-efficiency catalyst are used to oxidize all organic matter through the characteristics of hydroxyl radicals having a higher reaction rate and stronger oxidizing property with organic matter. The catalyst can catalyze ozone to directly oxidize organic matter in the water into CO 2 and H 2 O, or oxidize and decompose large molecular organic matter into small molecules, making them easier to degrade, thereby reducing COD in water.

[0016] Preferably, as a further implementable solution, a circulating water outlet and a reverse osmosis pool water outlet are provided at the bottom of the reverse osmosis pool, and the circulating water outlet is connected to the circulating water inlet.

[0017] Preferably, as a further implementable scheme, a grid is arranged in the coagulation sedimentation tank, a water inlet of the coagulation sedimentation tank is arranged at the bottom of the coagulation sedimentation tank, and a water outlet of the coagulation sedimentation tank is also arranged at the top of the coagulation sedimentation tank; the water inlet of the coagulation sedimentation tank is arranged below the grid, and a plurality of dosing systems are also arranged below the grid.

[0018] Preferably, as a further implementable solution, a pretreatment tank water outlet is provided at the top of the pretreatment tank, and a multi-layer grid is provided in front of the pretreatment tank water outlet.

[0019] Preferably, as a further feasible solution, it also includes a concentration crystallization tank connected to the ozone oxidation tank, which is used to concentrate and crystallize the treated wastewater.

[0020] The present invention also provides a wastewater treatment method performed by a system for treating organic matter in high-salt wastewater of coal chemical industry, comprising the following steps: After the high-salt wastewater is introduced, it is pretreated. After the pretreatment is completed, coagulation and sedimentation, biochemical treatment, cyclic oxidation and ozone oxidation are carried out in sequence, and then concentrated and crystallized.

[0021] The specific treatment process of organic matter in the kerosene chemical industry high-salt wastewater of the present invention is as follows: Collect high-salt wastewater generated by kerosene chemical enterprises, and introduce the high-salt wastewater into the pretreatment tank through the main water inlet set at the bottom of the pretreatment tank by using a pump; Then, the high-salinity wastewater is pre-treated through the multi-layer screens installed in front of the outlet of the pre-treatment tank to remove large suspended solids and floating objects in the high-salinity wastewater to prevent these substances from clogging the water pumps, pipes and subsequent treatment facilities, thereby ensuring the normal operation of the sewage treatment system; The pretreated wastewater will flow out from the pretreatment tank outlet set at the top of the pretreatment tank, and then flow into the coagulation sedimentation tank through the coagulation sedimentation tank inlet set at the bottom of the coagulation sedimentation tank, and then pass through the grille set below the coagulation sedimentation tank inlet to filter the impurities that have not been completely filtered out of the pretreatment tank to avoid affecting the subsequent treatment process; at this time, since a plurality of dosing systems are also set below the grille, the dosing system stores flocculants, coagulants, sodium hydroxide, sodium carbonate and magnesium chloride, and chemical substances are added through the dosing system to remove the total hardness, total silicon and other substances that affect membrane scaling in the high-salt wastewater for subsequent treatment units, and the grille can filter the substances after flocculation and precipitation by the dosing system to avoid affecting the subsequent treatment units; Subsequently, the wastewater treated in the coagulation sedimentation tank will flow out from the coagulation sedimentation tank outlet set at the top of the coagulation sedimentation tank, and flow into the biochemical treatment tank through the hydrolysis tank inlet set at the top of the hydrolysis tank in the biochemical treatment tank. The hydrolysis tank adopts a folded plate anaerobic hydrolysis tank, and the COD removal rate of the wastewater can be as high as 30%. At this time, the wastewater treated in the hydrolysis tank is higher than the aeration tank. At this time, due to the difference between the two tanks, the water flow will flow from the hydrolysis tank to the aeration tank autonomously due to gravity. The dyeing wastewater after hydrolysis and acidification is aerated, and the aeration of the A tank is controlled at 0.2mg / l, and the aeration of the O tank is controlled between 4mg / L to avoid affecting the subsequent treatment process due to lack of oxygen in the wastewater. The wastewater that has been aerated will then flow out from the outlet of the biochemical treatment tank set at the bottom of the aeration tank. It will flow into the circulating oxidation tank through the circulating oxidation tank inlet set at the top of the high-density sedimentation tank in the circulating oxidation tank, and then be dosed through multiple dosing systems set in the high-density sedimentation tank. The dosing system in the high-density sedimentation tank stores flocculants, calcium oxide, magnesium oxide, sodium hydroxide, sodium aluminate and sodium carbonate. By adding multiple agents, the suspended matter, turbidity, total hardness, total silicon and other substances in the wastewater are further removed in the high-density sedimentation tank. Subsequently, since a multi-layer grid is set between the high-density sedimentation tank and the filter tank, and a partition is set between the high-density sedimentation tank and the reverse osmosis tank, the wastewater in the high-density sedimentation tank will first flow into the filter tank instead of the reverse osmosis tank, and the wastewater in the high-density sedimentation tank will first be preliminarily filtered through the multi-layer grid set between the high-density sedimentation tank and the filter tank, so that the wastewater can be more completely and thoroughly removed from the suspended matter and other substances in the wastewater after further filtration in the filter tank. Then, the completely filtered wastewater will flow into the reverse osmosis pool through the pipe between the filter pool and the reverse osmosis pool, and the wastewater will be desalinated through the reverse osmosis process to produce water for reuse; the desalinated wastewater will flow out through the circulating outlet at the bottom of the reverse osmosis pool, and flow into the circulating oxidation pool again through the circulating inlet at the top of the high-density sedimentation pool for circulating treatment, and then the treated wastewater that meets the standards will flow out from the reverse osmosis pool outlet at the bottom of the reverse osmosis pool, and then flow into the subsequent ozone oxidation pool; In the ozone oxidation pool, hydroxyl radicals are formed by ozone under the action of high-efficiency catalysts. The reaction rate of hydroxyl radicals with organic matter is higher and the oxidizing property is stronger, so the organic matter in high-salinity wastewater can be better removed. Ozone can oxidize almost all organic matter. The catalyst can catalyze ozone to directly oxidize organic matter in water into CO2 and H2O, or oxidize and decompose large molecular organic matter into small molecules, making it easier to be degraded, thereby reducing COD in water. The wastewater after ozone oxidation treatment passes through the subsequent concentration and crystallization tank to further concentrate the wastewater so that the TDS meets the inlet conditions for evaporation and crystallization, and the concentrated inlet water can better desalinate.

[0022] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention provides a system for treating organic matter in high-salt wastewater from kerosene chemical industry, which can effectively solve the problem that organic matter in high-salt wastewater is difficult to degrade and remove, reduce the pressure of subsequent treatment process units, reduce the frequency of fouling and blockage of subsequent membrane systems and evaporation systems, reduce operating costs, and increase equipment service life, thus providing a solid foundation for ensuring stable operation of the system.

[0023] (2) The present invention provides a method for treating organic matter in high-salt wastewater from kerosene chemical industry. The system optimizes the process flow of wastewater treatment, integrates multiple water treatment modules, and uses efficient wastewater treatment methods to form a complete, efficient and environmentally friendly wastewater treatment system, thereby effectively improving the efficiency of wastewater treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of a system for treating organic matter in high-salt wastewater from kerosene chemical industry provided by the present invention.

[0025] Among them, 1. Main water inlet; 2. Pretreatment tank; 3. Screen; 4. Screen in coagulation sedimentation tank; 5. Coagulation sedimentation tank; 6. Dosing system in coagulation sedimentation tank; 7. Hydrolysis tank; 8. Aeration tank; 9. Biochemical treatment tank; 10. High-density sedimentation tank; 11. Dosing system in high-density sedimentation tank; 12. Reverse osmosis tank; 13. Circulation outlet; 14. Reverse osmosis tank outlet; 15. Filter tank; 16. Circulation oxidation tank; 17. Catalyst; 18. Ozone oxidation tank; 19. Concentration crystallization tank. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings and specific implementation methods of the specification, but those skilled in the art will understand that the embodiments described below are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] In order to more clearly explain the technical solution of the present invention, it is described in the form of specific embodiments below.

[0028] Example 1 See also Figure 1In the present invention, a system for treating organic matter in high-salt wastewater of kerosene chemical industry mainly comprises 1. a total water inlet; 2. a pretreatment tank; 3. a grille; 4. a grille in a coagulation sedimentation tank; 5. a coagulation sedimentation tank; 6. a dosing system in a coagulation sedimentation tank; 7. a hydrolysis tank; 8. an aeration tank; 9. a biochemical treatment tank; 10. a high-density sedimentation tank; 11. a dosing system in a high-density sedimentation tank; 12. a reverse osmosis tank; 13. a circulating water outlet; 14. a reverse osmosis tank outlet; 15. a filter tank; 16. a circulating oxidation tank; 17. a catalyst; 18. an ozone oxidation tank; 19. a concentration crystallization tank; See also Figure 1 The specific steps of the treatment method of the kerosene chemical high-salt wastewater organic matter treatment system of the present invention are as follows: The high-salt wastewater generated by the kerosene chemical enterprise is collected, and the high-salt wastewater is introduced into the pretreatment tank 2 through the main water inlet 1 set at the bottom of the pretreatment tank by using a pump; Then, the high-salinity wastewater is pre-treated by a multi-layer grid 3 arranged in front of the water outlet of the pre-treatment tank 2 to remove large suspended solids and floating objects in the high-salinity wastewater to prevent these substances from clogging the water pump, pipes and subsequent treatment facilities, thereby ensuring the normal operation of the sewage treatment system; The pretreated wastewater will flow out from the pretreatment tank outlet set at the top of the pretreatment tank 2, and then flow into the coagulation sedimentation tank 5 through the coagulation sedimentation tank inlet set at the bottom of the coagulation sedimentation tank 5, and then pass through the grille 4 set below the water inlet of the coagulation sedimentation tank 5 to filter the impurities that have not been completely filtered out of the pretreatment tank 2, so as to avoid affecting the subsequent treatment process; at this time, since a plurality of dosing systems 6 are also arranged below the grille, flocculants, coagulants, sodium hydroxide, sodium carbonate and magnesium chloride are stored in the dosing system, chemical substances are added through the dosing system 6 to remove the total hardness, total silicon and other substances that affect membrane scaling in the high-salt wastewater for subsequent treatment units, and the grille 4 can filter the substances after flocculation and precipitation by the dosing system, so as to avoid affecting the subsequent treatment units; Subsequently, the wastewater treated by the coagulation sedimentation tank 5 will flow out from the coagulation sedimentation tank outlet arranged at the top of the coagulation sedimentation tank 5, and flow into the biochemical treatment tank 9 through the hydrolysis tank inlet arranged at the top of the hydrolysis tank 7 in the biochemical treatment tank 9, wherein the hydrolysis tank 7 adopts a folding plate anaerobic hydrolysis tank, and the COD removal rate of the wastewater can be as high as 30%; at this time, the wastewater treated by the hydrolysis tank 7 is 1.5m higher than the aeration tank 8, and at this time, due to the difference in water flow between the two tanks, the water flow will flow from the hydrolysis tank 7 to the aeration tank 8 autonomously due to gravity. The dyeing wastewater after hydrolysis and acidification is aerated through the aeration process, and the aeration of the A tank is controlled at 0.2mg / l, and the aeration of the O tank is controlled between 4mg / L to avoid affecting the subsequent treatment process due to lack of oxygen in the wastewater; The wastewater after aeration will then flow out from the outlet of the biochemical treatment tank set at the bottom of the aeration tank 8. It will flow into the circulating oxidation tank 16 through the circulating oxidation tank inlet set at the top of the high-density sedimentation tank 10 in the circulating oxidation tank 16, and then be dosed through multiple dosing systems 11 set in the high-density sedimentation tank 10. The dosing system 11 in the high-density sedimentation tank 10 stores flocculants, calcium oxide, magnesium oxide, sodium hydroxide, sodium aluminate and sodium carbonate. By adding multiple agents, the suspended solids, turbidity, total hardness, total silicon and other substances in the wastewater are further removed in the high-density sedimentation tank 10. Since a multi-layer grid is provided between the high-density sedimentation tank 10 and the filter tank 15, and a partition is provided between the high-density sedimentation tank 10 and the reverse osmosis tank 12, the wastewater in the high-density sedimentation tank 10 will first flow into the filter tank 15 instead of the reverse osmosis tank 12, and the wastewater in the high-density sedimentation tank 10 will first pass through the multi-layer grid provided between the high-density sedimentation tank 10 and the filter tank 15 for preliminary filtration, so that the wastewater can be further filtered by the filter tank 15 to more completely and thoroughly remove the suspended matter and other substances in the wastewater; Then, the completely filtered wastewater will flow into the reverse osmosis pool 12 through the pipeline between the filter pool 15 and the reverse osmosis pool 12, and the wastewater will be desalinated through the reverse osmosis process to produce water for reuse; the desalinated wastewater will flow out through the circulating water outlet 13 set at the bottom of the reverse osmosis pool, and will flow into the circulating oxidation pool 16 again through the circulating water inlet set at the top of the high-density sedimentation pool 10 for circulating treatment, and then the treated wastewater that meets the standards will flow out from the reverse osmosis pool outlet 14 set at the bottom of the reverse osmosis pool 12, and then flow into the subsequent ozone oxidation pool 18; In the ozone oxidation tank 18, hydroxyl radicals formed by ozone under the action of high-efficiency catalyst 17 are used to better remove organic matter in high-salinity wastewater due to the characteristics of higher reaction rate and stronger oxidizing property of hydroxyl radicals with organic matter. Ozone can oxidize almost all organic matter, and the catalyst can catalyze ozone to directly oxidize organic matter in water into CO 2 and H 2 O, or oxidize and decompose macromolecular organic matter into small molecules, making them easier to degrade, thereby reducing COD in water; The wastewater after ozone oxidation treatment passes through the subsequent concentration crystallization tank 19, and the wastewater is further concentrated so that the TDS meets the water inlet conditions for evaporation and crystallization, and the concentrated water inlet can better perform desalination.

[0029] Subsequently, the final discharged sewage in Example 1 was measured to obtain a total COD removal rate of 89.2%, while the COD removal rate of Fenton oxidation was 60%, the COD removal rate of photocatalytic oxidation was 30%, the COD removal rate of electrocatalytic oxidation was 60%, and the COD removal rate of activated carbon adsorption was 75%. It can be seen that the process combination of the present application has a significant advantage in organic matter removal rate compared with other processes.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A system for treating organic matter in high-salt wastewater from kerosene chemical industry, characterized in that: It comprises a pretreatment tank, a coagulation sedimentation tank, a biochemical treatment tank, a circulating oxidation tank and an ozone oxidation tank which are arranged in sequence; wherein the biochemical treatment tank comprises a hydrolysis tank and an aeration tank, the top of the hydrolysis tank is provided with a hydrolysis tank water inlet, the bottom of the aeration tank is provided with a biochemical treatment tank water outlet, and the aeration tank is provided with an aeration device; the circulating oxidation tank comprises a high-density sedimentation tank, a filter tank and a reverse osmosis tank, the high-density sedimentation tank is located above the filter tank and the reverse osmosis tank, the top of the high-density sedimentation tank is provided with a circulating water inlet and a circulating oxidation tank water inlet, and the circulating oxidation tank water inlet is connected to the biochemical treatment tank water outlet.

2. The processing system according to claim 1, characterized in that The height of the hydrolysis tank is 1.5m-2m higher than that of the aeration tank, and the hydrolysis tank adopts a folded plate anaerobic hydrolysis tank.

3. The processing system according to claim 1, characterized in that A multi-layer grid is arranged between the high-density sedimentation tank and the filter tank, and a partition is arranged between the high-density sedimentation tank and the reverse osmosis tank.

4. The processing system according to claim 1, characterized in that A plurality of dosing systems are arranged in the high-density sedimentation tank, and the plurality of dosing systems are evenly distributed at the bottom of the high-density sedimentation tank.

5. The processing system according to claim 1, characterized in that The ozone oxidation tank is filled with an ozone catalyst.

6. The processing system according to claim 1, characterized in that A circulating water outlet and a reverse osmosis pool water outlet are arranged at the bottom of the reverse osmosis pool, and the circulating water outlet is connected to the circulating water inlet.

7. The processing system according to claim 1, characterized in that A grid is arranged in the coagulation sedimentation tank, a water inlet is arranged at the bottom of the coagulation sedimentation tank, and a water outlet is arranged at the top of the coagulation sedimentation tank; the water inlet of the coagulation sedimentation tank is arranged below the grid, and a plurality of dosing systems are also arranged below the grid.

8. The processing system according to claim 1, characterized in that A pretreatment tank water outlet is arranged on the top of the pretreatment tank, and a multi-layer grille is arranged in front of the pretreatment tank water outlet.

9. The processing system according to claim 1, characterized in that It also includes a concentration crystallization tank connected to the ozone oxidation tank, which is used to concentrate and crystallize the treated wastewater.

10. A method for treating wastewater using a system for treating organic matter in high-salt wastewater from coal chemical industry according to any one of claims 1 to 9, characterized in that: The following steps are involved: After the high-salt wastewater is introduced, it is pretreated. After the pretreatment is completed, coagulation and sedimentation, biochemical treatment, cyclic oxidation and ozone oxidation are carried out in sequence, and then concentrated and crystallized.

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