Oxidation treatment device for organic wastewater with high salt content

Abstract

The utility model relates to an oxidation treatment device for organic wastewater with high salt content, which comprises a wastewater storage tank 1, a plunger pump or diaphragm pump wastewater pump 2, a preheater 3, a gas flowmeter 4, an oxidation reaction tower 5, a pipeline oxidation reactor 6 and the like. The oxidation treatment device disclosed by the utility model is simple in structure, convenient to operate, safe and reliable, and good in treatment effect on organic wastewater with high salt content, the removal rate of TOC (Total Organic Carbon) reaches 99.50% or above, and the oxidation treatment device can be used for treating various industrial wastewater.

Description

[Technical Field]

[0001] This utility model relates to the field of industrial wastewater treatment technology. More specifically, this utility model relates to an oxidation treatment device for high-salt organic wastewater. [Background Technology]

[0002] High-salinity organic wastewater mainly originates from industrial production processes, such as chemical plants, oil and gas processing, coal chemical industry, petrochemical industry, printing and dyeing, refining, oil extraction, pharmaceuticals, and salt production. Besides organic pollutants, this type of wastewater contains large amounts of soluble inorganic salt ions such as calcium, magnesium, sodium, chloride, and sulfate, and may even contain radioactive substances. Due to its complex and diverse composition and high salinity, it strongly inhibits microbial growth, making its treatment far more difficult than that of ordinary wastewater. With industrial development, the discharge of high-salinity wastewater has increased year by year, placing enormous pressure on the environment. At the same time, national regulations on wastewater discharge are becoming increasingly stringent. Therefore, the efficient and economical treatment of high-salinity organic wastewater has become an urgent problem to be solved. [Utility Model Content]

[0003] [Technical problem to be solved]

[0004] The purpose of this invention is to provide an oxidation treatment device for organic wastewater with high salt content.

[0005] [Technical Solution]

[0006] This utility model is achieved through the following technical solution.

[0007] This utility model relates to an oxidation treatment device for high-salt organic wastewater, which includes a wastewater storage tank 1, a wastewater pump 2 and a preheater 3. It also includes a gas flow meter 4, an oxidation reaction tower 5, a pipeline oxidation reactor 6, a primary gas-liquid separator 7, a secondary gas-liquid separator 8, a condensate pump 9, a heat exchanger 10 and a brine pump 111.

[0008] Wastewater storage tank outlet 11, located at the bottom of wastewater storage tank 1, is connected to wastewater pump inlet 21 via a pipe. Wastewater pump outlet 22 is connected to preheater inlet 31, located at the top of preheater 3, via a pipe. Preheater outlet 32, located at the bottom of preheater 3, is connected to one connector of tee 34 via a pipe. The other connector is connected to oxidation reaction tower inlet 52, located at the bottom of oxidation reaction tower 5. The third connector is connected to flow meter outlet 42 of gas flow meter 4. Flow meter inlet 41 is connected to compressed air tank. Inside oxidation reaction tower 5, a first tower temperature sensor 53, a second tower temperature sensor 54, and a third tower temperature sensor 55 are installed from top to bottom. A pressure sensor 56 is installed at the top of oxidation reaction tower 5.

[0009] The outlet 51 of the oxidation reaction tower 5, located at the top of the oxidation reaction tower 5, is connected to the inlet 61 of the pipeline oxidation reactor via a pipe, while the outlet 62 of the pipeline oxidation reactor is connected to the inlet 71 of the primary gas-liquid separator located at the bottom of the primary gas-liquid separator 7 via a pipe; a first pipeline temperature sensor 63, a second pipeline temperature sensor 64, and a third pipeline temperature sensor 65 are respectively installed in the pipeline oxidation reactor 6.

[0010] A temperature sensor 74 is installed in the middle of the primary gas-liquid separator 7, and a pressure sensor 75 is installed at the top of the separator. The liquid outlet 72 of the primary gas-liquid separator 7, located at the top of the primary gas-liquid separator 7, is connected to the heat exchanger inlet 101 at the top of the heat exchanger 10 via a pipe, and the pipe below its outlet is inserted into the liquid. The gas outlet 73 of the primary gas-liquid separator 7, located next to the liquid outlet 72, is connected to the inlet 81 of the secondary gas-liquid separator 8, located at the top of the secondary gas-liquid separator 8, via a pipe. The gas outlet 83 of the secondary gas-liquid separator 7, located next to the inlet 81, is discharged to the exhaust gas treatment system via a pipe, while the condensate outlet 82 of the secondary gas-liquid separator 8, located at the bottom of the secondary gas-liquid separator 8, is connected to the condensate pump inlet 91 via a pipe, and the condensate is discharged from the system through the condensate pump outlet 92 via the condensate pump 9. A temperature sensor 84 is installed in the middle of the secondary gas-liquid separator 8, and a pressure sensor 85 is installed at the top of the secondary gas-liquid separator 8.

[0011] The heat exchanger outlet 102, located at the bottom of the heat exchanger 10, is connected to the brine pump inlet 112 via a pipe. The brine is then pumped by the brine pump 111 and discharged to the post-treatment system from the brine pump outlet 113.

[0012] According to a preferred embodiment of the present invention, the preheater 3 is a tubular heat exchanger with a height-to-inner-diameter ratio of 200 to 300:1. A heat medium outlet 34 is provided on the upper part of the side wall of the preheater 3, while a heat medium inlet 33 is provided on the lower part of the opposite side.

[0013] According to another preferred embodiment of the present invention, the oxidation reaction tower 5 is a vertical reactor with a tower plate structure, the ratio of its height to its diameter is 8 to 20:1, the tower plate is installed on the tower wall by means of hooks, and the shape of the tower plate is a perforated disc; the number of tower plates is 3 to 10.

[0014] According to another preferred embodiment of the present invention, the pipeline oxidation reactor 6 is a plug flow tube reactor with a length-to-diameter ratio of 150 to 300:1, and its capacity is 1 to 3 times that of the oxidation reaction tower 5.

[0015] According to another preferred embodiment of the present invention, the primary gas-liquid separator 7 is a separation device with a cylindrical body. Its volume is 0.5 to 1.0 times that of the oxidation reaction tower 5, and its height to diameter ratio is 5 to 10:1.

[0016] According to another preferred embodiment of the present invention, the secondary gas-liquid separator 8 is a separation device with a cylindrical body. Its volume is 0.3 to 0.5 times that of the oxidation reaction tower 5, and its height to diameter ratio is 6 to 8:1.

[0017] According to another preferred embodiment of the present invention, the heat exchanger 10 is a tubular heat exchanger with a height-to-inner-diameter ratio of 200 to 300:1. A refrigerant outlet 104 is provided on the upper part of the side wall of the heat exchanger 10, while a heat medium inlet 103 is provided on the lower part of the opposite side.

[0018] According to another preferred embodiment of the present invention, the wastewater pump 2 and the condensate pump 9 are plunger pumps or diaphragm pumps.

[0019] According to another preferred embodiment of the present invention, the gas flow meter 4 is a metal tube float flow meter, a mass flow meter, or a differential pressure flow meter.

[0020] According to another preferred embodiment of the present invention, the temperature sensor is a thermocouple sensor, a thermistor sensor, or a resistance temperature detector; the pressure sensor is a piezoresistive pressure sensor or a piezoelectric pressure sensor.

[0021] The present invention will now be described in more detail.

[0022] This utility model relates to an oxidation treatment device for high-salt organic wastewater, comprising a wastewater storage tank 1, a wastewater pump 2, and a preheater 3. It also includes a gas flow meter 4, an oxidation reaction tower 5, a pipeline oxidation reactor 6, a primary gas-liquid separator 7, a secondary gas-liquid separator 8, a condensate pump 9, a heat exchanger 10, and a brine pump 111. For the specific structure of this high-salt organic wastewater oxidation treatment device, please refer to the attached diagram. Figure 1 .

[0023] The wastewater storage tank outlet 11, located at the bottom of the wastewater storage tank 1, is connected to the wastewater pump inlet 21 via a pipe, while the wastewater pump outlet 22 is connected to the preheater inlet 31, located at the top of the preheater 3, via a pipe. The wastewater storage tank 1 is a tank used to store high-salt organic wastewater, which is wastewater generated by petroleum and natural gas processing, coal chemical, petrochemical, printing and dyeing, refining, oil extraction, pharmaceutical, and salt chemical enterprises, containing 8-20% inorganic salts by weight. The wastewater storage tank 1 used in this invention is, for example, a tank sold by Wuxi Hengnuo Chemical Equipment Manufacturing Co., Ltd. under the trade name "Brine Storage Tank". The wastewater pump 2 used in this invention is a diaphragm pump, a product currently sold on the market, for example, a pump sold by Zhejiang Ligao Pump Industry Technology Co., Ltd. under the trade name "Diaphragm Metering Pump".

[0024] The preheater 3 used in this invention is a tubular heat exchanger with a height-to-inner-diameter ratio of 200-300:1. A heat medium outlet 34 is provided on the upper part of the side wall of the preheater 3, while a heat medium inlet 33 is provided on the lower part of the opposite side. The heat medium is, for example, steam or heat transfer oil.

[0025] The function of the preheater 3 in this utility model is to heat the high-salt organic wastewater to the temperature required for subsequent treatment steps.

[0026] The preheater outlet 32, located at the bottom of the preheater 3, is connected to one joint of the tee 35 via a pipe, the other joint is connected to the oxidation reaction tower inlet 52 located at the bottom of the oxidation reaction tower 5, and the third joint is connected to the flow meter outlet 42 of the gas flow meter 4. The flow meter inlet 41 is connected to the compressed air tank via a pipe. A heat medium outlet 34 is provided at the top of the preheater 3, and a heat medium inlet 33 is provided at the bottom of the opposite side of the preheater 3.

[0027] The gas flow meter 4 used in this utility model is a product currently sold on the market, such as the product sold by Beijing Qixing Huachuang Flow Meter Co., Ltd. under the trade name Mass Flow Controller.

[0028] The basic function of the oxidation reaction tower 5 in this utility model of organic wastewater oxidation treatment device is to convert the long-chain organic matter contained in high-salt organic wastewater into short-chain organic matter, and at the same time convert the short-chain organic matter contained in it into carbon dioxide and water, thereby reducing the amount of organic matter in this wastewater for subsequent treatment.

[0029] The oxidation reaction tower 5 used in this invention is a vertical reactor with a tray structure, and its height-to-diameter ratio is 8 to 20:1. If its height-to-diameter ratio is less than 8:1, the oxidation reaction will be incomplete, resulting in poor wastewater oxidation and unqualified treated water. If its height-to-diameter ratio is greater than 20:1, the wastewater oxidation effect will not be significantly improved, and the equipment cost will increase.

[0030] The trays of oxidation reaction tower 5 are installed on the tower wall by hooks. The trays are perforated discs. There are no particular restrictions on the size and number of the holes, as long as they are sufficient to ensure that the wastewater is fully oxidized.

[0031] The oxidation reaction tower 5 has 3 to 10 trays. If there are fewer than 3 trays, backmixing of the liquid will occur, affecting the oxidation effect and resulting in substandard treated water. If there are more than 10 trays, there will be no significant improvement in the oxidation effect, but it will affect the smooth operation of the equipment and increase the equipment cost.

[0032] Inside the oxidation reaction tower 5, a first tower temperature sensor 53, a second tower temperature sensor 54, and a third tower temperature sensor 55 are installed from top to bottom. The purpose is to control the temperature of the entire oxidation reaction tower within a certain range to ensure that the oxidation reaction proceeds fully and to obtain qualified treated water. The temperature sensors used in this invention are all thermocouple type temperature sensors, which are products currently sold on the market, such as those sold by Tianchang Senpu Electronic Technology Co., Ltd. under the trade name Thermocouple Temperature Transmitter.

[0033] A pressure sensor 56 is installed at the top of the oxidation reaction tower 5. Its basic function is to monitor the pressure inside the oxidation reaction tower 5 to ensure that the oxidation reaction can proceed smoothly. The pressure sensor used in this invention is a piezoresistive pressure sensor, which is a product currently sold on the market, such as the product sold by Shanghai Yatan Instrument Co., Ltd. under the trade name General Purpose Pressure Sensor.

[0034] The outlet 51 of the oxidation reaction tower 5, located at the top of the oxidation reaction tower 5, is connected to the inlet 61 of the pipeline oxidation reactor via a pipe, while the outlet 62 of the pipeline oxidation reactor is connected to the inlet 71 of the primary gas-liquid separator located at the bottom of the primary gas-liquid separator 7 via a pipe; a first pipeline temperature sensor 63, a second pipeline temperature sensor 64, and a third pipeline temperature sensor 65 are respectively installed in the pipeline oxidation reactor 6.

[0035] The main function of the pipeline oxidation reactor 6 is to oxidize the short-chain organic matter contained in the effluent from the oxidation reaction tower 5 into carbon dioxide and water.

[0036] The pipe oxidation reactor 6 is a plug flow tubular reactor with a length-to-diameter ratio of 150–300:1, and its capacity is 1–3 times that of the oxidation reaction tower 5. If the length-to-diameter ratio of the pipe oxidation reactor 6 is less than 150:1, the reactor pipe diameter will be too large, making the reactant liquids prone to backmixing, affecting the smooth progress of the oxidation reaction, and resulting in substandard treated water. If the length-to-diameter ratio of the pipe oxidation reactor 6 is greater than 300:1, the pipes will be too long, prolonging the oxidation reaction time, increasing equipment costs, and the beneficial effect on the oxidation reaction will not be significant. Therefore, a length-to-diameter ratio of 150–300:1 for the pipe oxidation reactor 6 is appropriate.

[0037] If the capacity of the pipeline oxidation reactor 6 is less than one time that of the oxidation reaction tower 5, the reactants will not have enough residence time in the pipeline reactor, which will affect the oxidation effect and result in unqualified treated water. If the capacity of the pipeline oxidation reactor 6 is more than three times that of the oxidation reaction tower 5, the pipeline of the pipeline oxidation reactor will be too long, which will increase the equipment cost and the increase in the beneficial effect of oxidation will not be obvious.

[0038] The pipeline oxidation reactor 6 used in this invention is a product currently sold on the market, such as the product sold by Shenyang Dongfang Titanium Industry Co., Ltd. under the trade name High Pressure Tubular Reactor.

[0039] The first pipeline temperature sensor 63, the second pipeline temperature sensor 64, and the third pipeline temperature sensor 65 used in this utility model are the same as the temperature sensors of the oxidation reaction tower 5, so they will not be described again here.

[0040] In the primary gas-liquid separator 7, a temperature sensor 74 is installed in the middle of the separator, and a pressure sensor 75 is installed at the top of the separator. The liquid outlet 72 of the primary gas-liquid separator located at the top of the primary gas-liquid separator 7 is connected to the heat exchanger inlet 101 located at the top of the heat exchanger 10 through a pipe, and the lower end of the pipe in the liquid outlet 72 of the primary gas-liquid separator is inserted into the liquid.

[0041] The primary gas-liquid separator 7 in this utility model organic wastewater oxidation treatment device mainly functions to perform gas-liquid separation of the oxidation reaction liquid from the pipeline oxidation reactor 6.

[0042] The primary gas-liquid separator 7 used in this utility model is a separation device with a cylindrical body. Its volume is 0.5 to 1.0 times that of the oxidation reaction tower 5, and its height to diameter ratio is 5 to 10:1.

[0043] If the volume of the primary gas-liquid separator 7 is less than 0.5 times the volume of the oxidation reaction tower 5, it will cause large fluctuations in the liquid level of the separator, which is not conducive to controlling the gas-liquid separation; if the volume of the primary gas-liquid separator 7 is greater than 1.0 times the volume of the oxidation reaction tower 5, it will increase the equipment cost; therefore, it is reasonable for the volume of the primary gas-liquid separator 7 to be 0.5 to 1.0 times the volume of the oxidation reaction tower 5.

[0044] If the height-to-diameter ratio of the primary gas-liquid separator 7 is less than 5:1, it will result in a small operating space for the primary gas-liquid separator 7, which is not conducive to control; if the height-to-diameter ratio of the primary gas-liquid separator 7 is greater than 10:1, it will increase the difficulty of equipment manufacturing and installation; therefore, a height-to-diameter ratio of 5 to 10:1 for the primary gas-liquid separator 7 is appropriate.

[0045] The temperature sensor 74 and pressure sensor 75 installed in the primary gas-liquid separator 7 are the same as the temperature sensor and pressure sensor described above, and will be similar below, so they will not be described again.

[0046] The heat exchanger 10 used in this utility model is a tubular heat exchanger with a height-to-inner-diameter ratio of 200 to 300:1. A refrigerant outlet 104 is provided on the upper part of the side wall of the heat exchanger 10, while a refrigerant inlet 103 is provided on the lower part of the opposite side.

[0047] The main function of heat exchanger 10 in the organic wastewater oxidation treatment device of this utility model is to cool the effluent from the primary gas-liquid separator 7 and then discharge it outside the boundary by brine pump 111.

[0048] The heat exchanger 10 used in this utility model is a product currently sold on the market, such as the product sold by Wuxi Hengnuo Chemical Equipment Manufacturing Co., Ltd. under the trade name floating head heat exchanger.

[0049] The gas outlet 73 of the primary gas-liquid separator, located next to the liquid outlet 72 of the primary gas-liquid separator, is connected to the inlet 81 of the secondary gas-liquid separator located at the top of the secondary gas-liquid separator 8 via a pipeline; the gas outlet 83 of the secondary gas-liquid separator, located next to the inlet 81 of the secondary gas-liquid separator, is discharged to the exhaust gas treatment system via a pipeline, while the condensate outlet 82 of the secondary gas-liquid separator 8 is connected to the condensate pump inlet 91 via a pipeline, and the condensate is discharged outside the boundary through the condensate pump outlet 92 via the condensate pump 9; a temperature sensor 84 of the secondary gas-liquid separator is installed in the middle of the separator 8, and a pressure sensor 85 of the secondary gas-liquid separator is installed at the top of the separator;

[0050] The heat exchanger outlet 102, located at the bottom of the heat exchanger 10, is connected to the brine pump inlet 112 via a pipe. The brine is discharged to the outside via the brine pump outlet 113 through the brine pump 111.

[0051] The secondary gas-liquid separator 8 used in this invention is a separation device with a cylindrical body. Its volume is 0.3 to 0.5 times that of the oxidation reaction tower 5, and its height to diameter ratio is 6 to 8:1.

[0052] If the volume of the secondary gas-liquid separator 8 is less than 0.3 times that of the oxidation reaction tower 5, the liquid level of the secondary gas-liquid separator (8) will fluctuate greatly, which is not conducive to control; if the volume of the secondary gas-liquid separator 8 is greater than 0.5 times that of the oxidation reaction tower 5, the equipment cost will increase; therefore, it is advisable for the volume of the secondary gas-liquid separator 8 to be 0.3 to 0.5 times that of the oxidation reaction tower 5.

[0053] If the height-to-diameter ratio of the secondary gas-liquid separator 8 is less than 6:1, the operating space of the secondary gas-liquid separator (8) will be small, which is not conducive to control; if the height-to-diameter ratio of the secondary gas-liquid separator 8 is greater than 8:1, it will increase the difficulty of equipment manufacturing and installation; therefore, a height-to-diameter ratio of 6 to 8:1 for the secondary gas-liquid separator 8 is appropriate.

[0054] The condensate pump 9 used in this utility model is the same as the wastewater pump 2 mentioned above. Both are plunger pumps or diaphragm pumps, which are products currently sold on the market, such as the pumps sold by Zhejiang Ligao Pump Industry Technology Co., Ltd. under the trade name Diaphragm Metering Pump.

[0055] The high-salt organic wastewater oxidation treatment device of this invention is used to treat wastewater generated by coal chemical production enterprises containing 8-20% inorganic salt by weight. The TOC content of the original wastewater and the treated brine is detected by the standard test method "HJ 501-2009 Determination of Total Organic Carbon in Water - Combustion Oxidation - Non-dispersive Infrared Absorption Method". The TOC removal rate is calculated to be over 99.50%.

[0056] [Beneficial Effects]

[0057] This utility model presents an oxidation treatment device for high-salt organic wastewater. It has a simple structure, is easy to operate, safe and reliable, and has a good effect on treating high-salt organic wastewater, with a TOC removal rate of over 99.50%. It can be used for the treatment of various industrial wastewaters. [Attached Image Description]

[0058] Figure 1 This is a schematic diagram of the structure of the high-salt-content organic wastewater oxidation treatment device of this utility model;

[0059] In the picture:

[0060] 1-Wastewater storage tank, 11-Wastewater storage tank outlet, 2-Wastewater pump, 21-Wastewater pump inlet, 22-Wastewater pump outlet, 3-Preheater, 31-Preheater inlet, 32-Preheater outlet, 33-Heat medium inlet, 34-Heat medium outlet, 35-Tee, 4-Gas flow meter, 41-Flow meter inlet, 42-Flow meter outlet, 5-Oxidation reaction tower, 51-Oxidation reaction tower outlet, 52-Oxidation reaction tower inlet, 53-First tower temperature sensor, 54-Second tower temperature sensor, 55-Third tower temperature sensor, 56-Pressure sensor, 6-Pipeline oxidation reactor, 61-Pipeline oxidation reactor inlet, 62-Pipeline oxidation reactor outlet, 63-First pipeline temperature sensor, 64-Second pipeline temperature sensor, 65-Third pipeline temperature sensor, 7 - Primary gas-liquid separator, 71- Primary gas-liquid separator inlet, 72- Primary gas-liquid separator liquid outlet, 73- Primary gas-liquid separator gas outlet, 74- Primary gas-liquid separator temperature sensor, 75- Primary gas-liquid separator pressure sensor, 8- Secondary gas-liquid separator, 81- Secondary gas-liquid separator inlet, 82- Condensate outlet, 83- Secondary gas-liquid separator gas outlet, 84- Secondary gas-liquid separator temperature sensor, 85- Secondary gas-liquid separator pressure sensor, 9- Condensate pump, 91- Condensate pump inlet, 92- Condensate pump outlet, 10- Heat exchanger, 101- Heat exchanger inlet, 102- Heat exchanger outlet, 103- Refrigerant inlet, 104- Refrigerant outlet, 111- Brine pump, 112- Brine pump inlet, 113- Brine pump outlet. [Specific implementation method]

[0061] The invention will be better understood through the following examples.

[0062] Example 1: Oxidation treatment device for high-salt organic wastewater according to this invention

[0063] The implementation method of this embodiment is as follows:

[0064] The oxidation treatment device for high-salt organic wastewater of this utility model includes a wastewater storage tank 1, a plunger pump or diaphragm pump wastewater pump 2 and a preheater 3. It also includes a gas flow meter 4, an oxidation reaction tower 5, a pipeline oxidation reactor 6, a primary gas-liquid separator 7, a secondary gas-liquid separator 8, a plunger pump or diaphragm pump condensate pump 9, a heat exchanger 10 and a brine pump 111.

[0065] Wastewater storage tank outlet 11, located at the bottom of wastewater storage tank 1, is connected to wastewater pump inlet 21 via a pipe, while wastewater pump outlet 22 is connected to preheater inlet 31, located at the top of preheater 3, via a pipe. Preheater 3 is a tubular heat exchanger with a height-to-inner-diameter ratio of 270:1. Heat medium outlet 34 is provided on the upper part of the side wall of preheater 3, while heat medium inlet 33 is provided on the lower part of the opposite side. Preheater outlet 32, located at the bottom of preheater 3, is connected to one joint of tee 34 via a pipe, another joint is connected to oxidation reaction tower inlet 52, located at the bottom of oxidation reaction tower 5, and a third joint is connected to flow meter outlet 42 of gas flow meter 4, while flow meter inlet 41 is connected to compressed air tank.

[0066] Inside the oxidation reaction tower 5, a first tower temperature sensor 53, a second tower temperature sensor 54, and a third tower temperature sensor 55 are installed from top to bottom, respectively, while a pressure sensor 56 is installed at the top of the oxidation reaction tower 5. The oxidation reaction tower 5 is a vertical reactor with a tray structure, the ratio of its height to its diameter is 16:1, the tray is installed on the tower wall by hooks, and the tray shape is a perforated disc; there are 5 trays.

[0067] The outlet 51 of the oxidation reaction tower 5, located at the top, is connected to the inlet 61 of the pipeline oxidation reactor via a pipe, while the outlet 62 of the pipeline oxidation reactor is connected to the inlet 71 of the primary gas-liquid separator located at the bottom of the primary gas-liquid separator 7 via a pipe. The pipeline oxidation reactor 6 is a plug flow reactor with a length-to-diameter ratio of 300:1, and its capacity is 2.2 times that of the oxidation reaction tower 5. A first pipeline temperature sensor 63, a second pipeline temperature sensor 64, and a third pipeline temperature sensor 65 are installed in the pipeline oxidation reactor 6.

[0068] The primary gas-liquid separator 7 is a cylindrical separation device with a volume 0.7 times that of the oxidation reaction tower 5, and a height-to-diameter ratio of 10:1. A temperature sensor 74 is installed in the middle of the primary gas-liquid separator 7, and a pressure sensor 75 is installed at the top. The liquid outlet 72 at the top of the primary gas-liquid separator 7 is connected via a pipe to the heat exchanger inlet 101 at the top of the heat exchanger 10, with the pipe below the outlet inserted into the liquid. The gas outlet 73, located beside the liquid outlet 72, is connected via a pipe to the inlet 81 at the top of the secondary gas-liquid separator 8.

[0069] The secondary gas-liquid separator 8 is a cylindrical separation device with a volume 0.3 times that of the oxidation reaction tower 5 and a height-to-diameter ratio of 6.8:1. The gas outlet 83, located beside the inlet 81, is piped to the tail gas treatment system. The condensate outlet 82, located at the bottom of the secondary gas-liquid separator 8, is connected to the condensate discharge pump inlet 91 via a pipe. The condensate is discharged from the system via the condensate pump 9 and then from the condensate discharge pump outlet 92. A temperature sensor 84 is installed in the middle of the secondary gas-liquid separator 8, and a pressure sensor 85 is installed at the top of the separator.

[0070] Heat exchanger 10 is a tubular heat exchanger with a height-to-inner-diameter ratio of 240:1. A heat medium outlet 34 is provided on the upper part of the side wall of the preheater 3, while a heat medium inlet 33 is provided on the lower part of the opposite side. The heat exchanger outlet 102 located at the bottom of the heat exchanger 10 is connected to the brine pump inlet 112 via a pipe. Brine is discharged to the post-treatment system through the brine pump outlet 113 via the brine pump 111.

[0071] The TOC content and TOC removal rate of the brine and original wastewater obtained by using the oxidation treatment device of this embodiment, as determined by the method described in this application, are listed in Table 1.

[0072] Example 2: Oxidation treatment device for high-salt organic wastewater according to this utility model

[0073] The implementation method of this embodiment is the same as that of Embodiment 1, except for the following technical features: the ratio of the height to the inner diameter of the preheater 3 is 200:1; the ratio of the height to the diameter of the oxidation reaction tower 5 is 8:1, and the number of tower plates is 10; the ratio of the length to the diameter of the pipeline oxidation reactor 6 is 200:1, and its capacity is 1.0 times that of the oxidation reaction tower 5; the volume of the primary gas-liquid separator 7 is 0.5 times that of the oxidation reaction tower 5, and its height to diameter ratio is 8:1; the volume of the secondary gas-liquid separator 8 is 0.4 times that of the oxidation reaction tower 5, and its height to diameter ratio is 6.0:1; and the ratio of the height to the inner diameter of the heat exchanger 10 is 200:1.

[0074] The TOC content and TOC removal rate of the brine and original wastewater obtained by using the oxidation treatment device of this embodiment, as determined by the method described in this application, are listed in Table 1.

[0075] Example 3: Oxidation treatment device for high-salt organic wastewater according to this utility model

[0076] The implementation method of this embodiment is the same as that of Embodiment 1, except for the following technical features: the ratio of the height to the inner diameter of the preheater 3 is 230:1; the ratio of the height to the diameter of the oxidation reaction tower 5 is 20:1, and the number of tower plates is 3; the ratio of the length to the diameter of the pipeline oxidation reactor 6 is 150:1, and its capacity is 3.0 times that of the oxidation reaction tower 5; the volume of the primary gas-liquid separator 7 is 1.0 times that of the oxidation reaction tower 5, and its height to diameter ratio is 5:1; the volume of the secondary gas-liquid separator 8 is 0.5 times that of the oxidation reaction tower 5, and its height to diameter ratio is 7.4:1; and the ratio of the height to the inner diameter of the heat exchanger 10 is 300:1.

[0077] The TOC content and TOC removal rate of the brine and original wastewater obtained by using the oxidation treatment device of this embodiment, as determined by the method described in this application, are listed in Table 1.

[0078] Example 4: Oxidation treatment device for high-salt organic wastewater according to this utility model

[0079] The implementation method of this embodiment is the same as that of Embodiment 1, except for the following technical features: the ratio of the height to the inner diameter of the preheater 3 is 300:1; the ratio of the height to the diameter of the oxidation reaction tower 5 is 12:1, and the number of tower plates is 8; the ratio of the length to the diameter of the pipeline oxidation reactor 6 is 250:1, and its capacity is 1.8 times that of the oxidation reaction tower 5; the volume of the primary gas-liquid separator 7 is 0.8 times that of the oxidation reaction tower 5, and its height to diameter ratio is 7:1; the volume of the secondary gas-liquid separator 8 is 0.4 times that of the oxidation reaction tower 5, and its height to diameter ratio is 8.0:1; the ratio of the height to the inner diameter of the heat exchanger 10 is 280:1.

[0080] The TOC content and TOC removal rate of the brine and original wastewater obtained by using the oxidation treatment device of this embodiment, as determined by the method described in this application, are listed in Table 1.

[0081] Table 1: Results of wastewater treatment using the high-salt organic wastewater oxidation treatment device of this utility model

[0082]

Claims

1. An oxidation treatment device for high-salt organic wastewater, comprising a wastewater storage tank (1), a wastewater pump (2), and a preheater (3), characterized in that... It also includes a gas flow meter (4), an oxidation reaction tower (5), a pipeline oxidation reactor (6), a primary gas-liquid separator (7), a secondary gas-liquid separator (8), a condensate pump (9), a heat exchanger (10), and a brine pump (111). The wastewater storage tank outlet (11) located at the bottom of the wastewater storage tank (1) is connected to the wastewater pump inlet (21) through a pipe, while the wastewater pump outlet (22) is connected to the preheater inlet (31) located at the top of the preheater (3) through a pipe. The preheater outlet (32) located at the bottom of the preheater (3) is connected to one joint of the heat medium outlet (34) through a pipe, and the other joint is connected to the oxidation reaction tower inlet (52) located at the bottom of the oxidation reaction tower (5). The third joint is connected to the flow meter outlet (42) of the gas flow meter (4), while the flow meter inlet (41) is connected to the compressed air tank. Inside the oxidation reaction tower (5), the first tower temperature sensor (53), the second tower temperature sensor (54) and the third tower temperature sensor (55) are installed from top to bottom, respectively, while the pressure sensor (56) is installed at the top of the oxidation reaction tower (5). The outlet (51) of the oxidation reaction tower (5) located at the top of the oxidation reaction tower (5) is connected to the inlet (61) of the pipeline oxidation reactor through a pipe, while the outlet (62) of the pipeline oxidation reactor is connected to the inlet (71) of the primary gas-liquid separator located at the bottom of the primary gas-liquid separator (7) through a pipe; a first pipeline temperature sensor (63), a second pipeline temperature sensor (64) and a third pipeline temperature sensor (65) are installed in the pipeline oxidation reactor (6); A temperature sensor (74) is installed in the middle of the primary gas-liquid separator (7), and a pressure sensor (75) is installed at the top of the separator. The liquid outlet (72) at the top of the primary gas-liquid separator (7) is connected to the heat exchanger inlet (101) at the top of the heat exchanger (10) via a pipe, and the pipe below its outlet is inserted into the liquid. The gas outlet (73) next to the liquid outlet (72) is connected to the gas outlet at the top of the secondary gas-liquid separator (8) via a pipe. The inlet (81) of the secondary gas-liquid separator is connected; the gas outlet (83) of the secondary gas-liquid separator located next to the inlet (81) is discharged to the tail gas treatment system through a pipeline, while the condensate outlet (82) located at the bottom of the secondary gas-liquid separator (8) is connected to the condensate pump inlet (91) through a pipeline, and the condensate is discharged from the system through the condensate pump outlet (92) via the condensate pump (9); a temperature sensor (84) of the secondary gas-liquid separator is installed in the middle of the separator in the secondary gas-liquid separator (8), and a pressure sensor (85) of the secondary gas-liquid separator is installed at the top of the separator; The heat exchanger outlet (102) located at the bottom of the heat exchanger (10) is connected to the brine pump inlet (112) via a pipe. The brine is discharged to the post-treatment system via the brine pump outlet (113) through the brine pump (111).

2. The oxidation treatment device for high-salt organic wastewater according to claim 1, characterized in that... The preheater (3) is a tubular heat exchanger with a height-to-inner-diameter ratio of 200 to 300:

1. A heat medium outlet (34) is provided on the upper part of the side wall of the preheater (3), while a heat medium inlet (33) is provided on the lower part of the opposite side.

3. The oxidation treatment device for high-salt organic wastewater according to claim 1, characterized in that... The oxidation reaction tower (5) is a vertical reactor with a tray structure. Its height to diameter ratio is 8 to 20:

1. The tray is installed on the tower wall by hooks. The tray shape is a perforated disc. The number of trays is 3 to 10.

4. The oxidation treatment device for high-salt organic wastewater according to claim 1, characterized in that... The pipeline oxidation reactor (6) is a plug flow tube reactor with a length-to-diameter ratio of 150 to 300:1, and its capacity is 1 to 3 times that of the oxidation reaction tower (5).

5. The oxidation treatment device for high-salt organic wastewater according to claim 1, characterized in that... The primary gas-liquid separator (7) is a separation device with a cylindrical body. Its volume is 0.5 to 1.0 times that of the oxidation reaction tower (5), and its height to diameter ratio is 5 to 10:

1.

6. The oxidation treatment device for high-salt organic wastewater according to claim 1, characterized in that... The secondary gas-liquid separator (8) is a separation device with a cylindrical body. Its volume is 0.3 to 0.5 times that of the oxidation reaction tower (5), and its height to diameter ratio is 6 to 8:

1.

7. The oxidation treatment device for high-salt organic wastewater according to claim 1, characterized in that... The heat exchanger (10) is a tubular heat exchanger with a height-to-inner-diameter ratio of 200 to 300:

1. A refrigerant outlet (104) is provided on the upper part of the side wall of the heat exchanger (10), while a heat medium inlet (103) is provided on the lower part of the opposite side.

8. The oxidation treatment device for high-salt organic wastewater according to claim 1, characterized in that... Wastewater pump (2) and condensate pump (9) are plunger pumps or diaphragm pumps.

9. The oxidation treatment device for high-salt organic wastewater according to claim 1, characterized in that... The gas flow meter (4) is a metal tube float flow meter, mass flow meter or differential pressure flow meter.

10. The oxidation treatment device for high-salt organic wastewater according to claim 1, characterized in that... The temperature sensor is a thermocouple sensor, a thermistor sensor, or a resistance temperature detector; the pressure sensor is a piezoresistive pressure sensor or a piezoelectric pressure sensor.

Images