High-sulfur ethylene waste alkali liquor oil removal and debenzolization integrated equipment and catalytic oxidation biochemical system comprising same

Abstract

The utility model discloses high-sulfur ethylene waste alkali liquor oil removal and debenzolization integrated equipment and a system comprising the same. The equipment comprises an oil removal section, a benzene removal section, a dirty oil section and a connecting section, wherein an oil-water collector, a water distribution ring pipe, a water collection ring pipe, an oil collection pipe and optional inclined plate filler are arranged in the oil removal section; an aeration internal part is arranged in the debenzolization section; sump oil is temporarily stored in the sump oil section. The equipment disclosed by the utility model can be used for effectively removing petroleum and benzene substances in the waste alkali liquor, and has the function of buffering the waste alkali liquor and dirty oil at the same time. The device is high in integration level, small in occupied area, reasonable in structural design and good in oil removal effect, the content of benzene in the waste alkali liquid is reduced, and secondary utilization of desulfurization oxygen-deficient waste gas is facilitated.

Description

Technical Field

[0001] The utility model belongs to the field of environmental engineering equipment, and in particular relates to waste alkali liquid oil removal and benzene removal integrated equipment and a catalytic oxidation biochemical system containing the same. Background Art

[0002] At present, the main treatment method for waste alkali liquor with high oil content, high sulfur content and high COD content in the petrochemical industry is high temperature (220℃-280℃) and high pressure (3.5 MPaG-4.5 MPaG) wet oxidation. The free oil concentration in the raw waste alkali liquor is generally between 500-1500 mg / L, and the sulfide (S 2- ) concentration is between 4000-15000 mg / L, and COD concentration is between 12000-45000 mg / L. When wet oxidation is used, oil removal is usually not performed separately, but in the separator of the wet oxidation device, a part of the petroleum substances are volatilized into the process tail gas through a process similar to flash evaporation and flotation. However, this method increases the concentration of VOCS in the tail gas, and most of the petroleum substances still remain in the drainage of the device, and subsequent oil removal treatment is required.

[0003] In the ethylene production process of petrochemical enterprises, there are many production processes that produce high-sulfur waste alkali liquor, for example: in the process of producing ethylene by steam cracking of naphtha, in the process of catalytic cracking of crude oil, heavy oil or light oil to produce ethylene, and in the process of ethane cracking to produce olefins, waste alkali liquor containing Na2S, Na2CO3, NaOH, organic matter and petroleum substances will be produced. The above-mentioned waste alkali liquor is subjected to oil washing (generally using pyrolysis gasoline) extraction to remove "butter" treatment in the device area. The oil washing extraction process will introduce benzene substances into the waste alkali liquor. As a result, the waste alkali liquor after the oil washing extraction will carry oil and benzene substances, wherein the free oil concentration is between 500-1500mg / L and the benzene concentration is between 100-700mg / L.

[0004] Compared with the high-temperature and high-pressure wet oxidation method, the inventor disclosed a device and method for treating high-sulfur waste lye and high-salt and high-nitrate nitrogen difficult-to-biodegrade wastewater (patent number: ZL202210272145.1), which has the characteristics of low investment, low operating cost, energy saving and emission reduction, better treatment effect, simple operation and management. This method is used in catalytic oxidation desulfurization process (such as Figure 8 As shown, in this process, the desulfurization reactor ⑥ and the aerobic biochemical reactor Both require gas, the former is catalytic oxidation desulfurization, and the latter is biochemical reaction). Although degreasing treatment is carried out at the front end to remove most of the petroleum and benzene, the waste alkali liquid still contains a large amount of residual benzene substances. The benzene substances that are difficult to biodegrade will enter the gas phase during desulfurization, and enter the biochemical reactor with the desulfurized oxygen-depleted waste gas, causing the benzene content in the liquid phase of the biochemical reactor to be too high. Excessive benzene will inhibit the normal growth of microorganisms and affect the secondary utilization of the desulfurized oxygen-depleted waste gas (biochemical reaction). Therefore, it is necessary to remove oil and benzene before desulfurization.

[0005] The invention patent with application number 202211142339.6 discloses a high-efficiency oil-water separation device for use in a debenzene tower. The device is used to treat a mixture of wash oil and crude benzene. The device uses gravity separation (density difference between oil and water) and polymerization separation in the debenzene tower to separate oil and water between polymerization plates, and at the same time, the mixture of crude benzene and lean oil after deoiling is debenzened using the principle of distillation. The debenzene tower of the device belongs to a traditional distillation tower, which integrates the oil-water separation function in one chamber.

[0006] The utility model patent with announcement number CN208182935U discloses a rich oil debenzening system, and the invention patent with announcement number CN108424793A discloses a rich oil debenzening system and a rich oil debenzening method. The prior art mainly utilizes the waste heat of the coke oven to heat the lean oil, and the high-temperature lean oil removes the benzene in the rich oil to the gas phase, and the benzene gas is cooled to become crude benzene (liquid phase), and the non-condensable gas and other storage tanks are nitrogen-sealed to the gas negative pressure pipe. Among them, the debenzening is to remove the benzene in the rich oil by high temperature, and the negative pressure is the other non-condensable gas after the benzene gas is condensed by the vacuum pump, and the nitrogen gas phase is used to seal the crude benzene, rich oil, lean oil and other atmospheric pressure tanks. Utility Model Content

[0007] The utility model provides an integrated device for removing oil and benzene from high-sulfur ethylene waste alkali liquor. The device can remove oil and benzene from the high-sulfur ethylene waste alkali liquor, which is beneficial to the secondary utilization of desulfurized and oxygen-depleted waste gas generated in the actual production of high-sulfur ethylene waste alkali liquor in a biochemical system. The device has a high degree of integration, and both oil removal and benzene removal are hydraulically and fully automatically performed, thus saving energy consumption and investment; and the device occupies a small area.

[0008] On the one hand, the utility model provides an integrated device for deoiling and debenzening waste alkali liquid of high sulfur ethylene, wherein the device is an integrated device consisting of a deoiling section, a debenzening section, a dirty oil section and a connecting section, and comprises:

[0009] The oil removal section, whose inlet includes a waste alkali liquid feed port of the oil removal section and a gas phase communication port, wherein the gas phase communication port is connected to the waste gas outlet of the dirty oil section; the outlet of the oil removal section includes a dirty oil outlet of the oil removal section, a waste alkali liquid outlet for oil removal, and a top gas phase port, wherein the waste oil outlet of the oil removal section is connected to the waste oil inlet of the dirty oil section, the waste alkali liquid outlet for oil removal is connected to the waste alkali liquid feed port of the debenzening section, and the top gas phase port is connected to an external waste gas treatment system; the oil removal section is used to perform oil removal treatment on the waste alkali liquid;

[0010] The debenzening section has an inlet including a debenzening section waste alkali liquid feed inlet and a nitrogen inlet, wherein the debenzening section waste alkali liquid feed inlet is connected to the deoiling section waste alkali liquid outlet; the debenzening section outlet includes a debenzening waste alkali liquid outlet and a debenzening section waste gas outlet, wherein the debenzening waste alkali liquid outlet is connected to an external waste alkali liquid lifting pump, and the debenzening section waste gas outlet is connected to an external waste gas treatment system; the debenzening section is used to remove benzene substances in the waste alkali liquid and temporarily store the waste alkali liquid; the deoiling section contains benzene in the oil phase, most of the oil and benzene are removed, and the residual benzene is further removed by the debenzening section to avoid benzene substances that are difficult to biodegrade from entering the desulfurized and oxygen-depleted waste gas. When the desulfurized and oxygen-depleted waste gas enters the biochemical reactor for secondary utilization, the benzene content in the wastewater is too high, which inhibits the normal growth of microorganisms.

[0011] The dirty oil section has an inlet for the dirty oil, which is connected to the dirty oil outlet of the de-oiling section; the outlet of the dirty oil section includes a dirty oil outlet of the dirty oil section and a waste gas outlet of the dirty oil section, wherein the dirty oil outlet of the dirty oil section is connected to an external dirty oil pump, and the waste gas outlet of the dirty oil section is connected to the gas phase communication port of the de-oiling section; the dirty oil section is used for temporarily storing the dirty oil;

[0012] The connecting section is used to connect the debenzene section and the waste oil section.

[0013] In a preferred embodiment of the utility model, the sulfide concentration of the waste alkali solution is between 4000-15000 mg / L, the COD concentration is between 12000-45000 mg / L, the free oil concentration is between 500-1500 mg / L, the benzene concentration is between 100-700 mg / L, and the pH is 13-14.

[0014] In the integrated equipment of the utility model, the waste alkali liquor is ethylene waste alkali liquor after oil washing and oil removal treatment, including waste alkali liquor from olefin production units such as direct cracking of crude oil, steam cracking of naphtha, catalytic thermal cracking of heavy oil, and cracking of ethane.

[0015] In the integrated equipment of the utility model, the oil removal section adopts the communicating vessel principle and utilizes the density difference between the dirty oil and the waste alkali liquid to perform hydraulic fully automatic oil removal treatment on the waste alkali liquid with high oil content.

[0016] In the integrated device of the utility model, one or more groups of oil removal sections are arranged in a stacked manner.

[0017] In one embodiment of the integrated device of the utility model, a group of oil removal sections are provided in the integrated device of the utility model, and a uniform water distribution component is arranged above the oil removal section, and the uniform water distribution component includes a total water inlet, a water inlet trough, a water distribution trough, and a water distribution port; the water inlet trough and the water distribution trough are located at the top of the oil removal section, the total water inlet is connected with the water inlet trough for the waste alkali liquid to enter, and the waste alkali liquid overflows evenly into the water distribution trough, the water distribution trough corresponds to the water distribution port, and the water distribution port is connected with the waste alkali liquid feed port of the oil removal section through an external pipeline.

[0018] The oil removal section is provided with an oil removal section waste alkali liquid feed port, an oil-water distributor, an oil-water distributor outer jacket, a distribution pipe, a water distribution ring pipe, a distribution hole, a water collection hole, a water collection ring pipe, a collection pipe, an oil removal waste alkali liquid outlet, a siphon breaking pipe, an oil-water distributor partition, an oil collection port, and an oil removal section dirty oil outlet;

[0019] Among them, an oil-water distributor is vertically set up in the center of the oil removal section;

[0020] The outer edge of the upper middle part of the oil-water distributor is provided with the outer jacket of the oil-water distributor; the upper part of the outer jacket of the oil-water distributor is connected with the waste alkali liquid feed port of the oil removal section; the lower part of the outer jacket of the oil-water distributor is connected with the water distribution ring pipe through three distribution pipes which are 120 degrees to each other, and the water distribution ring pipe is evenly provided with distribution holes opening upward, and the waste alkali liquid enters the oil-water distributor from the waste alkali liquid feed port, and then flows out evenly through the distribution holes and flows into the cavity of the oil removal section to separate oil and water ; The water collecting ring pipe is arranged at the lower part of the oil-water distributor, and is connected with the lower part of the oil-water distributor through three collecting pipes which are 120° to each other, and the water collecting ring pipe is evenly provided with water collecting holes which open downwards, so as to evenly collect the waste alkali solution from oil removal; the oil-water distributor baffle is arranged at the upper part of the oil-water distributor, and the upper part of the oil-water distributor baffle is evenly provided with oil collecting ports along the oil-water distributor, and is connected with the dirty oil outlet of the oil removal section, and the baffle is flush with the lower edge of the dirty oil outlet of the oil removal section;

[0021] The outlet of the waste alkali liquid from oil removal is connected with the upper part of the oil-water distributor, and a siphon breaking pipe is provided on the connecting pipe to ensure that the waste alkali liquid can be discharged smoothly. The outlet of the waste alkali liquid from oil removal is connected with the feed port of the waste alkali liquid of the debenzening section through an external pipeline, so that the waste alkali liquid from oil removal flows to the debenzening section by gravity.

[0022] The dirty oil outlet of the oil removal section is connected to the dirty oil inlet of the dirty oil section through an external pipeline, and the dirty oil is collected through the oil receiving port and flows from the dirty oil outlet of the oil removal section to the dirty oil section;

[0023] In a further implementation scheme of the integrated equipment of the utility model, the oil removal section is also provided with an emptying port, a gas phase connecting port, an upper flange port of a liquid level gauge, a lower flange port of a liquid level gauge, a thermometer port, a maintenance port, a top gas phase port, a pressure transmitter port, a breathing valve port, and an emergency discharge manhole; the emptying port is used to discharge the waste alkali liquid; the gas phase connecting port is connected to the waste gas outlet of the dirty oil section, and the side wall is provided with an upper flange port of a liquid level gauge, a lower flange port of a liquid level gauge, and a thermometer port for monitoring the liquid level and temperature of the oil removal section; the maintenance port is used for equipment maintenance; the top gas phase port is used for nitrogen sealing air intake and exhaust of waste gas, the pressure transmitter port is used to monitor pressure, the breathing valve port is used for overpressure exhaust and low-pressure intake, and the emergency discharge manhole is used for emergency discharge.

[0024] In a further embodiment of the integrated device of the utility model, the inclined plate filler is arranged below the water distribution ring pipe, and the small-sized oil particles in the waste alkali liquid that are difficult to float are gathered into large oil particles through the inclined plate filler to float, and the oil and water are separated, thereby improving the oil removal efficiency. The surface hydraulic load of the inclined plate area of ​​the oil removal section is 0.6m 3 / (m 2 ·h)-0.8m 3 / (m 2 ·h). The hydraulic surface load without inclined plate filler is 0.3m 3 / (m 2 ·h)-0.4m 3 / (m 2 h); By adding inclined plate fillers, the surface hydraulic load of the oil removal section is increased, which is more conducive to oil-water separation.

[0025] In another embodiment of the integrated device of the utility model, 1-4 groups of the oil removal sections are stacked in the integrated device, and a water distribution component is arranged above the top group of oil removal sections; the waste alkali liquid overflows from the water inlet tank to 1-4 water distribution tanks of the same specifications, and partitions are arranged between the water inlet tank and the water distribution tank and between the water distribution tanks; four water distribution ports of equal height are connected with the four groups of waste alkali liquid feed ports through external pipes respectively; the outlet of each group of oil removal waste alkali liquid is connected with the waste alkali liquid feed port of the debenzene section through an external pipe; the dirty oil outlet of each group of oil removal section is connected with the dirty oil inlet of the dirty oil section through an external pipe; the gas phase communication port of each group is connected with the waste gas outlet of the dirty oil section through an external pipe; when multiple groups are stacked, the gas phase of each group is connected with the gas phase communication port of the top group, and the gas phase space of the top group is also provided with a top gas phase port, a pressure transmitter port, a breathing valve port and an emergency discharge manhole.

[0026] In the integrated equipment of the utility model, the debenzene section utilizes low-pressure nitrogen aeration to remove benzene substances in the waste alkali liquid to the gas phase and temporarily store the waste alkali liquid.

[0027] In one embodiment of the integrated device of the utility model, the debenzene section includes a debenzene section waste alkali liquid feed port, a nitrogen inlet, an aeration main pipe, an aeration branch pipe, an aeration hole, a debenzene waste alkali liquid outlet, a thermometer port, a level gauge upper flange port, a level gauge lower flange port, a debenzene section waste gas outlet, a breathing valve port, and an inspection port; wherein the debenzene section waste alkali liquid feed port is located in the middle and lower part of the debenzene section, and is connected to the deoiling waste alkali liquid outlet through an external pipeline; the nitrogen inlet is located at the lower part of the debenzene section, and the nitrogen inlet is connected to the aeration main pipe, and the compound Several equidistant aeration branch pipes are vertically connected to the aeration main pipe. Aeration holes are evenly distributed along the aeration branch pipes and are alternately opened at an angle of about 45° downward relative to the vertical line of the center of the aeration pipe. They are used for nitrogen aeration to remove residual benzene in the waste alkali liquid to the gas phase; the outlet of the waste alkali liquid for debenzenization is connected to the external waste alkali liquid lifting pump; the side wall is provided with a thermometer port, an upper flange port of the liquid level gauge, and a lower flange port of the liquid level gauge for monitoring the liquid level and temperature; the waste gas outlet of the debenzenization section is used to discharge the waste gas, the breathing valve port is used for overpressure exhaust and low-pressure intake, and the maintenance port is used for equipment maintenance.

[0028] In the integrated device of the utility model, the dirty oil section buffers the dirty oil discharged from the oil removal section.

[0029] In one embodiment of the integrated device of the utility model, the dirty oil inlet of the dirty oil section is connected to the dirty oil outlet of the de-oiling section through an external pipeline, and the dirty oil flows into the dirty oil section by gravity; the dirty oil outlet of the dirty oil section is connected to an external dirty oil pump, and the waste gas outlet of the dirty oil section is connected to the gas connection port of the de-oiling section for exhausting waste gas; the upper flange port of the liquid level gauge and the lower flange port of the liquid level gauge are used to monitor the liquid level, and the inspection port is used for equipment maintenance. Preferably, the connecting section is used to connect the debenzene section and the dirty oil section.

[0030] In a further embodiment of the integrated device of the utility model, the operating temperature of the debenzene section is 50-60° C. During operation, the feed can be heated by desulfurization waste alkali solution (temperature 50-80° C.), and the temperature of the deoiling section and the debenzene section is maintained at 50-60° C. during operation.

[0031] In a further embodiment of the integrated device of the utility model, the debenzene section is aerated with an inert gas at a pressure not exceeding 3 kg during operation, and the aeration intensity is 4-10 Nm 3 / m 2 h. In principle, the debenzene section uses oxygen-free gas during operation. If the hydrocarbon polymers in the waste alkali liquid come into contact with oxygen or air, they will quickly form polymers, commonly known as butter, which will block equipment and pipelines. If the pressure of the inert gas is too high, on the one hand, the inert gas is wasted, and on the other hand, from the perspective of equipment safety, the safety of the equipment is reduced, and the equipment wall thickness needs to be increased or other safety measures need to be added.

[0032] In a further implementation scheme of the integrated device of the utility model, the debenzene section (during operation, nitrogen with a pressure not exceeding 3 kg is used for aeration, and the aeration intensity is between 4-10 Nm3 / m2·h. The aeration intensity is an empirical value that can both remove the benzene in the gas and not cause gas waste.

[0033] In a further embodiment of the integrated device of the utility model, the hydraulic retention time of the debenzene section at the lowest liquid level is 1.5 hours. The retention time is used to ensure the contact time between the waste alkali liquid and the aeration gas. If the aeration time is too short, the benzene in the liquid phase is not enough to be taken away by the gas. The above time is the minimum required time.

[0034] In the device of the present invention, the debenzening is to first remove most of the oil and benzene in the waste alkali liquid by deoiling. Then, at 50-60°C, low-pressure inert gas (such as nitrogen) is used for aeration at the bottom of the liquid phase to remove the remaining benzene in the waste alkali liquid. The device is used for blowing off benzene.

[0035] Another aspect of the utility model provides a catalytic oxidation and biochemical system for high-sulfur ethylene waste alkali liquid, the system sequentially comprising:

[0036] The integrated equipment for oil removal and benzene removal of high-sulfur ethylene waste alkali liquor; a desulfurization reactor; and an aerobic biochemical reactor; wherein the sulfide concentration of the high-sulfur ethylene waste alkali liquor feed of the integrated equipment for oil removal and benzene removal of high-sulfur ethylene waste alkali liquor is between 4000-15000 mg / L, the COD concentration is between 12000-45000 mg / L, the free oil concentration is between 500-1500 mg / L, the benzene concentration is between 100-700 mg / L, and the pH is 13-14; the operating temperature of the debenzene section of the integrated equipment for oil removal and benzene removal of high-sulfur ethylene waste alkali liquor is 50-60°C; the operating temperature of the desulfurization reactor does not exceed 80°C.

[0037] The system design of the utility model is that the waste alkali liquid is first pre-treated by the integrated equipment to remove oil and benzene as much as possible. In this way, the amount of benzene in the desulfurized and oxygen-depleted waste gas after benzene enters the gas phase to participate in the subsequent desulfurization reaction will be greatly reduced (benzene is not good for biochemical treatment), thereby enabling the desulfurized and oxygen-depleted waste gas to be reused for subsequent biochemical reactions.

[0038] The system of the utility model is a system for catalytic oxidation desulfurization and biochemical treatment of high-sulfur ethylene waste alkali liquor. For waste alkali liquor, it is generally directly neutralized by a neutralization device. However, the treatment object of the system of the utility model is waste alkali liquor with high sulfur content. Accordingly, the system includes a desulfurization reactor; the desulfurized oxygen-depleted waste gas generated after the action of the desulfurization reactor is very convenient for secondary utilization, and the COD in the waste water is further removed by an aerobic biochemical reactor to obtain more purified water quality. In such a system, in order to remove benzene in high-sulfur waste alkali liquor and overcome the influence of benzene on the reaction in the aerobic biochemical reactor, the system is provided with the high-sulfur ethylene waste alkali liquor degreasing and debenzening integrated equipment. The high-sulfur ethylene waste alkali liquor degreasing and debenzening integrated equipment is the front-end equipment of the waste alkali liquor catalytic oxidation biochemical system. After degreasing and debenzening in the equipment, the waste alkali liquor enters the desulfurization reactor for catalytic oxidation desulfurization, so that the benzene content in the desulfurized oxygen-depleted waste gas is reduced, and the desulfurized oxygen-depleted waste gas can be used as a gas source for the aerobic biochemical reactor for secondary utilization to further remove COD.

[0039] In principle, the higher the temperature, the better the removal of benzene. However, the sulfur content in the waste alkali liquid is related to the temperature rise of the desulfurization reaction (exothermic) process and the desulfurization reaction control temperature (not exceeding 80°C). In this system, under the sulfur content, the temperature rise of the desulfurization process is between 20-30°C, so the temperature of the debenzenization section is preferably 50-60°C.

[0040] In the system of the utility model, the sulfide concentration refers to S 2- concentration.

[0041] The utility model has the following effects:

[0042] 1. The treatment objects (waste alkali liquor) of the integrated equipment of the utility model are all produced by ethylene devices, that is, the treatment objects contain oil and benzene. Specifically, the free oil concentration contained in the waste alkali liquor is between 500-1500 mg / L, generally light oil, and the benzene content is between 100-700 mg / L.

[0043] After being treated by this integrated equipment, most of the oil and benzene can be removed in the oil removal section, and the residual benzene is further removed through the debenzening section to prevent the benzene substances that are difficult to biodegrade from entering the desulfurized and oxygen-depleted exhaust gas. When the desulfurized and oxygen-depleted exhaust gas enters the biochemical reactor for secondary utilization, the benzene content in the wastewater is too high, which inhibits the normal growth of microorganisms.

[0044] After being treated by this integrated equipment, the free oil in the effluent from the debenzenization section is reduced to below 50 mg / L, and the benzene is reduced to below 70 mg / L.

[0045] 2. The integrated equipment of the utility model integrates the oil removal section, the benzene removal section and the dirty oil section into one device, and the equipment has a high degree of integration.

[0046] The oil removal section structure of the utility model device is to make the waste alkali evenly distributed into the cavity of the oil removal section through the water distribution ring pipe and the oil-water distributor. In the cavity of the oil removal section, the oil and water are separated by standing still. The oil layer is distributed in the upper part of the oil removal section, and the water layer is in the lower part. The oil layer enters the oil discharge pipe after passing through the oil collection holes in the upper part and is discharged. The waste alkali liquid enters the oil-water distributor through the water collection ring pipe in the lower part and is then discharged through the drain port. The thickness of the oil layer can be adjusted by the height of the pipe openings of the drain pipe and the oil discharge pipe.

[0047] The benzene removal section structure of the utility model device utilizes the principle of air stripping to remove benzene from the waste alkali liquid after oil removal. Benzene is not used as a product. The purpose of benzene removal is to reduce the amount of benzene entering the gas phase during the subsequent aeration process of the waste alkali so as to facilitate the secondary utilization of the waste gas.

[0048] The utility model performs oil removal and benzene removal in different cavities respectively, and integrates the waste alkali liquid buffering function after oil removal and benzene removal and the dirty oil cavity, and has corresponding functions.

[0049] 3. The degreasing section of the integrated equipment of the utility model is a vertical structure, which occupies a small area and saves space. The degreasing section can perform hydraulic full-automatic degreasing treatment on waste alkali liquid with high oil content. The degreasing waste alkali liquid flows to the debenzening section by gravity. No instrument, dynamic parts or power consumption are required in the degreasing process, and the degreasing effect is good; the dirty oil flows to the dirty oil section by gravity, which can save energy and avoid the influence of a large amount of petroleum on the subsequent processing units. In addition, one or more groups of degreasing sections can be set according to the processing volume of the waste alkali liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a vertical view of an integrated equipment for degreasing and debenzening high-sulfur ethylene waste alkali liquor of the utility model;

[0051] Figure 2 This is a vertical view of the deoiling section (multiple groups) of an integrated equipment for deoiling and debenzening high-sulfur ethylene waste alkali liquor of the utility model;

[0052] Figure 3 This is an AA cross-sectional view of an integrated equipment for degreasing and debenzening high-sulfur ethylene waste alkali liquor of the utility model;

[0053] Figure 4 This is a BB cross-sectional view of an integrated equipment for degreasing and debenzening high-sulfur ethylene waste alkali liquor of the utility model;

[0054] Figure 5 This is a CC cross-sectional view of an integrated equipment for degreasing and debenzening high-sulfur ethylene waste alkali liquor of the utility model;

[0055] Figure 6 This is a DD cross-sectional view of an integrated equipment for degreasing and debenzening high-sulfur ethylene waste alkali liquor of the utility model;

[0056] Figure 7 This is an enlarged view of the utility model of an integrated equipment K for degreasing and debenzening high-sulfur ethylene waste alkali liquid;

[0057] Figure 8 This is a process flow chart of the biochemical catalytic oxidation of waste alkali liquid.

[0058] Description of the accompanying drawings:

[0059] 1- oil removal section; 101- water inlet; 102- water inlet tank; 103- water distribution tank; 104- water distribution port; 105- waste alkali liquid feed port of oil removal section; 106- oil-water distributor; 107- outer jacket of oil-water distributor; 108- distribution pipe; 109- water distribution ring pipe; 110- distribution hole; 111- inclined plate filler; 112- water collection hole; 113- water collection ring pipe; 114- collection pipe; 115- waste alkali liquid outlet of oil removal section 116-siphon breaking pipe; 117-oil-water distributor partition; 118-oil receiving port; 119-oil removal section dirty oil outlet; 120-drain port; 121-gas phase connection port; 122-level gauge upper flange port; 123-level gauge lower flange port; 124-thermometer port; 125-inspection port; 126-top gas phase port; 127-pressure transmitter port; 128-breathing valve port; 129-emergency discharge manhole;

[0060] 2-debenzene section; 201-debenzene section waste alkali liquid feed port; 202-nitrogen inlet; 203-aeration main pipe; 204-aeration branch pipe; 205-aeration hole; 206-debenzene waste alkali liquid outlet; 207-thermometer port; 208-liquid level gauge upper flange port; 209-liquid level gauge lower flange port; 210-debenzene section waste gas outlet; 211-breathing valve port; 212-inspection port;

[0061] 3-dirty oil section; 301-dirty oil inlet; 302-dirty oil section dirty oil outlet; 303-dirty oil section waste gas outlet; 304-upper flange port of liquid level gauge; 305-lower flange port of liquid level gauge; 306-inspection port;

[0062] 4-Connection segment;

[0063] ①-waste alkali liquid; ②-oil removal and benzene removal tower; ③-waste oil recovery; ④-nitrogen; ⑤-high concentration waste gas treatment system; ⑥-desulfurization reactor; ⑦-desulfurizer; ⑧-screw compressor; ⑨-liquid separation tank; ⑩-oxygen-depleted waste gas; - pipeline mixers; - concentrated sulfuric acid; -High-salinity wastewater; - antagonists; -Aerobic biochemical reactor; - reflux liquid; -To subsequent processing systems; -To low concentration exhaust gas treatment system. DETAILED DESCRIPTION

[0064] The orientation or position relationship indicated by the terms "upper" and "lower" is based on the orientation or position relationship shown in the drawings and is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0065] Figure 1-Figure 7 The utility model is a schematic diagram of an embodiment of an integrated device for removing oil and benzene from high-sulfur ethylene waste alkali liquid.

[0066] In this embodiment, the integrated equipment for deoiling and debenzening waste alkali liquid of high sulfur ethylene is a device which is integrated with a deoiling section 1, a debenzening section 2, a waste oil section 3 and a connecting section 4.

[0067] like Figure 1 As shown, the inlet of the deoiling section 1 includes the deoiling section waste alkali liquid feed port 105 and the gas phase connection port 121; wherein the gas phase connection port 121 is connected to the waste gas outlet 303 of the dirty oil section. The outlet of the deoiling section 1 includes the deoiling section waste oil outlet 119, the deoiling waste alkali liquid outlet 115, and the top gas phase port 126; the deoiling section waste oil outlet 119 is connected to the waste oil inlet 301 of the dirty oil section, the deoiling waste alkali liquid outlet 115 is connected to the debenzening section waste alkali liquid feed port 201, and the top gas phase port 126 is connected to the external waste gas treatment system. The deoiling section 1 is used to deoil the waste alkali liquid.

[0068] The inlet of the debenzene section 2 includes a debenzene section waste alkali liquid feed port 201 and a nitrogen inlet 202; the debenzene section waste alkali liquid feed port 201 is connected to the deoiling section deoiling waste alkali liquid outlet 115. The outlet of the debenzene section 2 includes a debenzene waste alkali liquid outlet 206 and a debenzene section waste gas outlet 210; the debenzene waste alkali liquid outlet 206 is connected to an external waste alkali liquid lifting pump, and the debenzene section waste gas outlet 210 is connected to an external waste gas treatment system. The debenzene section 2 is used to remove benzene substances in the waste alkali liquid and to temporarily store the waste alkali liquid.

[0069] The inlet of the dirty oil section 3 is the dirty oil inlet 301; the dirty oil inlet 301 is connected to the de-oiling section dirty oil outlet 119. The outlet of the dirty oil section 3 includes the dirty oil section dirty oil outlet 302 and the dirty oil section waste gas outlet 303; wherein the dirty oil section dirty oil outlet 302 is connected to an external dirty oil pump, and the dirty oil section waste gas outlet 303 is connected to the de-oiling section gas phase communication port 121. The dirty oil section 3 is used to temporarily store dirty oil.

[0070] The connecting section 4 is used to connect the debenzene section 2 and the waste oil section 3.

[0071] Combination Figure 1 and Figure 3-5 A group of oil removal sections 1 are provided in the integrated equipment, and a uniform water distribution component is provided above the oil removal section 1, and the uniform water distribution component includes a total water inlet 101, a water inlet trough 102, a water distribution trough 103, and a water distribution port 104; the water inlet trough 102 and the water distribution trough 103 are located at the top of the oil removal section 1, the total water inlet 101 is connected with the water inlet trough 102, for the waste alkali liquid to enter, and the waste alkali liquid overflows evenly into the water distribution trough 103, the water distribution trough 103 corresponds to the water distribution port 104, and the water distribution port 104 is connected with the waste alkali liquid feed port 105 of the oil removal section through an external pipeline. The oil removal section 1 is provided with an oil removal section waste alkali liquid feed port 105, an oil-water distributor 106, an oil-water distributor outer jacket 107, a distribution pipe 108, a water distribution ring pipe 109, a distribution hole 110, a water collection hole 112, a water collection ring pipe 113, a collection pipe 114, an oil removal waste alkali liquid outlet 115, a siphon breaking pipe 116, an oil-water distributor baffle 117, an oil collection port 118, and an oil removal section waste oil outlet 119; wherein, an oil-water distributor 106 is vertically set up in the center of the oil removal section 1; the outer jacket 107 of the oil-water distributor 106 in the middle and upper part is provided with a The outer jacket 107 of the oil-water distributor is arranged at the edge; the upper part of the outer jacket 107 of the oil-water distributor is connected with the waste alkali liquid feed port 105 of the oil removal section; the lower part of the outer jacket 107 of the oil-water distributor is connected with the water distribution ring pipe 109 through three distribution pipes 108 which are 120 degrees to each other, and the water distribution ring pipe 109 is evenly distributed with distribution holes 110 which open upwards, and the waste alkali liquid enters the oil-water distributor 106 from the waste alkali liquid feed port 105, and then flows out evenly through the distribution holes 110 and flows into the cavity of the oil removal section to separate oil and water; the oil-water distributor The water collecting ring pipe 113 is arranged at the lower part of 106, and the water collecting ring pipe 113 is connected with the lower part of the oil-water distributor 106 through three collecting pipes 114 which are 120 degrees to each other. The water collecting ring pipe 113 is evenly distributed with water collecting holes 112 which are open downwards, and are used to evenly collect the waste alkali solution from oil removal; the oil-water distributor baffle 117 is arranged at the upper part of the oil-water distributor 106, and the upper part of the oil-water distributor baffle 117 is evenly distributed with oil collecting ports 118 along the oil-water distributor 106, and is connected with the dirty oil outlet 119 of the oil removal section, and the baffle 117 is connected with the oil removal section. The lower edge of the section dirty oil outlet 119 is flush; the oil removal waste alkali liquid outlet 115 is connected with the upper part of the oil-water collector 106, and a siphon breaking pipe 116 is provided on the connecting pipe to ensure that the waste alkali liquid can be discharged smoothly. The oil removal waste alkali liquid outlet 115 is connected with the debenzening section waste alkali liquid feed inlet 201 through an external pipeline, so that the oil removal waste alkali liquid flows to the debenzening section 2 by gravity; the oil removal section dirty oil outlet 119 is connected with the dirty oil inlet 301 of the dirty oil section 3 through an external pipeline, and the dirty oil is collected through the oil receiving port 118, and flows from the oil removal section dirty oil outlet 119 to the dirty oil section 3 by gravity.

[0072] The oil removal section 1 is also provided with an emptying port 120, a gas phase connecting port 121, an upper flange port 122 of a liquid level gauge, a lower flange port 123 of a liquid level gauge, a thermometer port 124, a maintenance port 125, a top gas phase port 126, a pressure transmitter port 127, a breathing valve port 128, and an emergency discharge manhole 129; the emptying port 120 is used for emptying the waste alkali liquid; the gas phase connecting port 121 is connected with the waste gas outlet 303 of the dirty oil section, and the side wall is provided with an upper flange port 122 of a liquid level gauge, a lower flange port 123 of a liquid level gauge, and a thermometer port 124, which are used to monitor the liquid level and temperature of the oil removal section; the maintenance port 125 is used for equipment maintenance; the top gas phase port 126 is used for nitrogen sealing air intake and exhaust of waste gas, the pressure transmitter port 127 is used to monitor the pressure, the breathing valve port 128 is used for overpressure exhaust and low pressure intake, and the emergency discharge manhole 129 is used for emergency discharge.

[0073] The inclined plate filler 111 is arranged below the water distribution ring pipe 109. The small oil particles in the waste alkali solution that are difficult to float are gathered into large oil particles through the inclined plate filler 111 and float, so that the oil and water are separated and the oil removal efficiency is improved. The hydraulic load on the surface of the inclined plate area of ​​the oil removal section is 0.6m 3 / (m 2 ·h)-0.8m 3 / (m 2 h).

[0074] Figure 2 In the integrated device, 1-4 groups of the oil removal sections 1 are stacked, and a water distribution component is arranged above the top group of oil removal sections 1; the waste alkali liquid overflows from the water inlet tank 102 to 1-4 water distribution tanks 103a-d of the same specifications, and partitions are arranged between the water inlet tank and the water distribution tank and between the water distribution tanks; four water distribution ports 104a-d of equal height are respectively connected to the four groups of waste alkali liquid feed ports 105a-d through external pipes; each group of oil removal waste alkali liquid outlets 115a-d are connected to the debenzene section waste alkali liquid outlets 115a-d through external pipes. The liquid feed port 201 is connected; the dirty oil outlet 119a-d of each group of oil removal sections is connected with the dirty oil inlet 301 of the dirty oil section 3 through an external pipeline; the gas phase communication port 121a-d of each group is connected with the waste gas outlet 303 of the dirty oil section through an external pipeline; when multiple groups are stacked, the gas phase of each group is connected with the gas phase communication port 121 of the top group, and the gas phase space of the top group is also provided with a top gas phase port 126, a pressure transmitter port 127, a breathing valve port 128 and an emergency discharge manhole 129.

[0075] Combination Figure 1 and Figure 6The debenzene section 2 includes a debenzene section waste alkali liquid feed port 201, a nitrogen inlet 202, an aeration main pipe 203, an aeration branch pipe 204, an aeration hole 205, a debenzene waste alkali liquid outlet 206, a thermometer port 207, a level gauge upper flange port 208, a level gauge lower flange port 209, a debenzene section waste gas outlet 210, a breathing valve port 211, and an inspection port 212; wherein the debenzene section waste alkali liquid feed port 201 is located in the middle and lower part of the debenzene section, and is connected to the deoiling waste alkali liquid outlet 115 through an external pipeline; the nitrogen inlet 202 is located in the lower part of the debenzene section, and the nitrogen inlet 202 is connected to the aeration main pipe 203, and the compound Several equidistant aeration branch pipes 204 are vertically connected to the aeration main pipe 203, and aeration holes 205 are evenly distributed along the aeration branch pipes 204, and are alternately opened at an angle of about 45° downward relative to the vertical line of the center of the aeration pipe, for nitrogen aeration to remove residual benzene in the waste alkali liquid to the gas phase; the waste alkali liquid outlet 206 for debenzening is connected to an external waste alkali liquid lifting pump; the side wall is provided with a thermometer port 207, a liquid level gauge upper flange port 208, and a liquid level gauge lower flange port 209 for monitoring the liquid level and temperature; the waste gas outlet 210 of the debenzening section is used to discharge the waste gas, the breathing valve port 211 is used for overpressure exhaust and low-pressure intake, and the maintenance port 212 is used for equipment maintenance.

[0076] The dirty oil inlet 301 of the dirty oil section 3 is connected to the dirty oil outlet 119 of the de-oiling section through an external pipeline, and the dirty oil flows into the dirty oil section 3 by gravity; the dirty oil outlet 302 of the dirty oil section is connected to the external dirty oil pump, and the waste gas outlet 303 of the dirty oil section is connected to the gas phase communication port 117 of the de-oiling section 1 for exhausting waste gas; the upper flange port 304 and the lower flange port 305 of the liquid level gauge are used to monitor the liquid level, and the inspection port 306 is used for equipment maintenance. Preferably, the connecting section is used to connect the debenzene section and the dirty oil section.

[0077] Specifically, the operation of the integrated equipment for oil removal and benzene removal of high sulfur ethylene waste alkali liquid in this embodiment is as follows.

[0078] In this embodiment, a pilot test was conducted using a petrochemical enterprise's ethylene waste alkali liquid, and sampling and monitoring were performed. The waste alkali liquid had a S 2- The concentration is between 5000-7000mg / L, the COD concentration is between 12000-13000mg / L, the free oil concentration is between 800-1000mg / L, the benzene concentration is between 500-650mg / L, and the pH is between 13-14.

[0079] Figure 8 This is a process flow chart of catalytic oxidation biochemical method. Figure 8The position of the deoiling and debenzening tower ② in the entire catalytic oxidation biochemical process is shown, wherein the deoiling and debenzening tower ② has the high sulfur ethylene waste alkali liquid deoiling and debenzening integrated equipment structure of the utility model, with a specification of Ф1.2×15m, wherein the deoiling section 1 is 6m high, the debenzening section 2 is 4m high, the dirty oil section 3 is 2m high, and the connecting section 4 is 3m high. The deoiling section is set in one group, and an inclined plate filler 111 is set. The deoiling and debenzening tower ② with the high sulfur ethylene waste alkali liquid deoiling and debenzening integrated equipment structure of the utility model is used to treat the waste alkali liquid.

[0080] Combination Figure 1 As shown, a feed heat exchanger is also provided at the pipe of the waste alkali liquid feed port 105 of the deoiling section of the deoiling and debenzening tower ② to heat the feed waste alkali liquid. 3 / h flow rate is continuously and evenly introduced into the inlet and outlet heat exchanger to exchange heat for the waste alkali liquid, so that the temperature of the waste alkali liquid is maintained at about 58°C. The heat exchange of the heat exchanger can use the desulfurization effluent at about 73°C of the waste alkali liquid catalytic oxidation biochemical process cycle as a heat source.

[0081] After heat exchange, the waste alkali liquid at a temperature of about 58°C enters the oil-water distributor outer jacket 107 located in the upper middle part of the oil-water distributor 106 through the waste alkali liquid feed port 105 of the oil removal section of the integrated equipment; the lower part of the oil-water distributor outer jacket 107 is connected to the water distribution ring pipe 109 through three distribution pipes 108 arranged at 120° to each other, and the waste alkali liquid is evenly distributed in the oil removal section cavity through the distribution holes 110 evenly distributed on the water distribution ring pipe 109.

[0082] An inclined plate filler 111 is arranged below the water distribution ring pipe 109. Small oil particles that are difficult to float are gathered into large oil particles through the inclined plate filler and then float up, and the oil and water are separated. The distance between the center of the water distribution ring pipe 109 and the upper end surface of the inclined plate filler 111 is H1, and H1 is between 1-1.5m; if the inclined plate filler 111 is not arranged, the vertical distance between the center of the water distribution ring pipe 109 and the center of the water collection ring pipe 113 is H5, and H5>1.5m.

[0083] The lower part of the oil-water distributor 106 is connected to the water collecting ring pipe 113 through three collecting pipes 114 at 120 degrees to each other. The deoiling waste alkali liquid is collected into the oil-water distributor 106 through the water collecting holes 112 evenly distributed on the water collecting ring pipe 113 and opening downward. The upper part of the oil-water distributor 106 is connected to the deoiling waste alkali liquid outlet 115. A siphon breaking pipe 116 is arranged on the connecting pipe. The deoiling waste alkali liquid outlet 115 is connected to the debenzening section waste alkali liquid feed port 201 through an external pipeline. The deoiling waste alkali liquid collected and entered into the oil-water distributor 106 gradually rises in the oil-water distributor 106, and flows to the debenzening section 2 through the deoiling waste alkali liquid outlet 115 and the external pipeline. The distance between the center of the water collecting ring pipe 113 and the lower end surface of the inclined plate filler 111 is H2, and H2 is between 1-1.5m.

[0084] An oil-water distributor partition 117 is provided on the upper portion of the oil-water distributor 106. Figure 8 As shown, the upper part of the oil-water distributor partition 117 is evenly distributed with oil receiving ports 118 along the oil-water distributor 106, and is connected to the oil removal section dirty oil outlet 119, and the oil removal section dirty oil outlet 119 is connected to the dirty oil inlet 301 of the dirty oil section 3 through an external pipeline; the dirty oil is collected through the oil receiving ports 118 and flows to the dirty oil section 3 through the oil removal section dirty oil outlet 119. The distance between the lower edge of the oil receiving port 118 and the center of the oil removal waste alkali liquid outlet 115 pipe is H3, and H3 is between 0.15-0.25m.

[0085] A drain port 120 is provided at the bottom of the degreasing section 1 for draining, i.e., draining, when maintenance is required, the waste alkali liquid in the degreasing section can be drained; a gas phase connection port 121 is connected with the waste gas outlet 303 of the dirty oil section, and is used for gas phase communication of the dirty oil section 3; a level gauge upper flange port 122, a level gauge lower flange port 123, and a thermometer port 124 are used for monitoring the liquid level and temperature; a maintenance port 125 is used for equipment maintenance, a top gas phase port 126 is provided for nitrogen sealing air intake and exhaust gas discharge (i.e., it is used for the gas phase space to keep the tank top gas phase in a slightly positive pressure state, which can reduce the emission of waste gas from the storage tank, and on the other hand, isolate the material from the air to prevent the hydrocarbon substances in the waste alkali liquid from polymerizing and producing butter when encountering oxygen in the air, which will clog the equipment or pipeline and affect the normal operation of the system), a pressure transmitter port 127 is used for monitoring the pressure, a breathing valve port 128 is used for overpressure exhaust and low-pressure intake, and an emergency discharge manhole 129 is used for emergency discharge.

[0086] The debenzene waste alkali liquid feed port 201 is located in the middle of the debenzene section 2, and is connected to the deoiling waste alkali liquid outlet 115 through an external pipeline, and the deoiling waste alkali liquid enters the debenzene section 2. The distance between the center of the deoiling waste alkali liquid outlet 115 and the center of the water distribution ring pipe 109 is H4, H4>1.5m.

[0087] like Figure 1 As shown, a nitrogen inlet 202 is provided at the lower part of the debenzene section. Figure 6 As shown, the nitrogen inlet 202 is connected to the aeration main pipe 203, and a plurality of equidistant aeration branch pipes 204 are vertically connected to the aeration main pipe 203. The aeration holes 205 are evenly distributed along the aeration branch pipes 204, and are alternately opened at an angle of about 45° downward relative to the vertical line of the center of the aeration pipe, for nitrogen aeration to remove the residual benzene in the waste alkali liquid to the gas phase. Low-pressure nitrogen is blown into the debenzening section of the deoiling and debenzening tower, and the nitrogen volume is 9Nm 3 / h, the temperature of the debenzene section is 55-57℃, and the liquid level of the debenzene section is maintained at 1.5-2.5m.

[0088] After the equipment runs smoothly, the waste alkali liquid inlet water and the debenzene section outlet water are tested, and the results are as follows:

[0089]

[0090] In this embodiment, the free oil in the effluent from the debenzenization stage is reduced to below 50 mg / L, and the benzene is reduced to below 70 mg / L.

[0091] The debenzene waste alkali liquid outlet 206 is connected to the external waste alkali liquid lifting pump; the thermometer port 207, the liquid level gauge upper flange port 208, and the liquid level gauge lower flange port 209 are used to monitor the liquid level and temperature, the debenzene section waste gas outlet 210 is used to discharge waste gas, the breathing valve port 211 is used for overpressure exhaust and low-pressure intake, and the maintenance port 212 is used for equipment maintenance.

[0092] The dirty oil inlet 301 of the dirty oil section 3 is connected to the dirty oil outlet 119 of the oil removal section through an external pipeline, and the dirty oil flows into the dirty oil section 3 by gravity. The dirty oil outlet 302 of the dirty oil section is connected to an external dirty oil pump, and the waste gas outlet 303 of the dirty oil section is connected to the gas phase communication port 121 of the oil removal section 1 for exhausting waste gas; the upper flange port 304 of the liquid level gauge and the lower flange port 305 of the liquid level gauge are used to monitor the liquid level, and the maintenance port 306 is used for equipment maintenance.

[0093] The above description is only illustrative and not restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the claims, but all will fall within the scope of protection of the present invention.

Claims

1. An integrated equipment for deoiling and debenzenizing high-sulfur ethylene waste alkali liquor, characterized in that: The device comprises: The deoiling section (1) has an inlet including a waste alkali liquid feed port (105) of the deoiling section and a gas phase communication port (121), wherein the gas phase communication port (121) is connected to a waste gas outlet (303) of the dirty oil section; the outlet of the deoiling section (1) includes a waste oil outlet (119) of the deoiling section, a waste alkali liquid outlet (115) of the deoiling section, and a top gas phase port (126), wherein the waste oil outlet (119) of the deoiling section is connected to a waste oil inlet (301) of the dirty oil section, the waste alkali liquid outlet (115) of the deoiling section is connected to a waste alkali liquid feed port (201) of the debenzening section, and the top gas phase port (126) is connected to an external waste gas treatment system; the deoiling section (1) is used for deoiling the waste alkali liquid; The debenzene section (2) has an inlet including a debenzene section waste alkali liquid feed inlet (201) and a nitrogen inlet (202), wherein the debenzene section waste alkali liquid feed inlet (201) is connected to the deoiling section waste alkali liquid outlet (115); the outlet of the debenzene section (2) includes a debenzene waste alkali liquid outlet (206) and a debenzene section waste gas outlet (210), wherein the debenzene waste alkali liquid outlet (206) is connected to an external waste alkali liquid lifting pump, and the debenzene section waste gas outlet (210) is connected to an external waste gas treatment system; the debenzene section (2) is used to remove benzene substances in the waste alkali liquid and temporarily store the waste alkali liquid; The dirty oil section (3) has an inlet which is a dirty oil inlet (301), and the dirty oil inlet (301) is connected to the dirty oil outlet of the de-oiling section; the outlet of the dirty oil section (3) includes a dirty oil outlet (302) of the dirty oil section and a waste gas outlet (303) of the dirty oil section, wherein the dirty oil outlet (302) of the dirty oil section is connected to an external dirty oil pump, and the waste gas outlet (303) of the dirty oil section is connected to the gas phase communication port (121) of the de-oiling section; the dirty oil section (3) is used for temporarily storing dirty oil; The connecting section (4) is used to connect the debenzene section and the waste oil section.

2. The device according to claim 1, characterized in that The integrated device is provided with a group of oil removal sections (1); A uniform water distribution component is arranged above the degreasing section (1), the uniform water distribution component comprising a total water inlet (101), a water inlet trough (102), a water distribution trough (103), and a water distribution port (104); the water inlet trough (102) and the water distribution trough (103) are located at the top of the degreasing section (1), the total water inlet (101) is connected to the water inlet trough (102) for waste alkali liquid to enter, and the waste alkali liquid overflows and uniformly enters the water distribution trough (103), the water distribution trough (103) corresponds to the water distribution port (104), and the water distribution port (104) is connected to the waste alkali liquid feed port (105) of the degreasing section through an external pipeline; The de-oiling section (1) is provided with a waste alkali liquid feed port (105) for the de-oiling section, an oil-water distributor (106), an outer jacket (107) for the oil-water distributor, a distribution pipe (108), a water distribution ring pipe (109), distribution holes (110), water collection holes (112), a water collection ring pipe (113), a collecting pipe (114), a waste alkali liquid outlet (115) for de-oiling, a siphon breaking pipe (116), an oil-water distributor partition (117), an oil collection port (118), and a waste oil outlet (119) for the de-oiling section; Wherein, an oil-water distributor (106) is vertically arranged in the center of the oil removal section (1); The outer edge of the upper middle portion of the oil-water distributor (106) is provided with the oil-water distributor outer jacket (107); The upper part of the outer jacket (107) of the oil-water distributor is connected to the waste alkali liquid feed port (105) of the oil removal section; the lower part of the outer jacket (107) of the oil-water distributor is connected to the water distribution ring pipe (109) through three distribution pipes (108) that are 120 degrees apart from each other. The water distribution ring pipe (109) is evenly distributed with distribution holes (110) that open upward, so that the waste alkali liquid enters the oil-water distributor (106) from the waste alkali liquid feed port (105) of the oil removal section, and then flows out evenly through the distribution holes (110) and flows into the cavity of the oil removal section to separate oil and water. The hydraulic load on the surface of the oil removal section is 0.3m 3 / (m 2 ·h)-0.4m 3 / (m 2 h); The water collecting ring pipe (113) is arranged at the lower part of the oil-water collector (106). The water collecting ring pipe (113) is connected to the lower part of the oil-water collector (106) through three collecting pipes (114) which are 120 degrees apart from each other. The water collecting ring pipe (113) is evenly distributed with water collecting holes (112) opening downwards, which are used to evenly collect the deoiling waste alkali liquid. The oil-water distributor baffle (117) is arranged on the upper part of the oil-water distributor (106); the upper part of the oil-water distributor baffle (117) is evenly distributed with oil receiving ports (118) along the oil-water distributor (106) and is connected to the oil removal section dirty oil outlet (119); the baffle (117) is flush with the lower edge of the oil removal section dirty oil outlet (119); The outlet (115) of the waste alkali liquid for oil removal is connected to the upper part of the oil-water collector (106). A siphon breaking pipe (116) is provided on the connecting pipe to ensure that the waste alkali liquid can be discharged smoothly. The outlet (115) of the waste alkali liquid for oil removal is connected to the feed port (201) of the waste alkali liquid for the debenzening section through an external pipeline, so that the waste alkali liquid for oil removal flows to the debenzening section (2) by gravity. The oil removal section dirty oil outlet (119) is connected to the dirty oil inlet (301) of the dirty oil section (3) through an external pipeline, and the dirty oil is collected through the oil receiving port (118) and flows from the oil removal section dirty oil outlet (119) to the dirty oil section (3).

3. The device according to claim 1 or 2, characterized in that The waste alkali solution has a sulfide concentration of 4000-15000 mg / L, a COD concentration of 12000-45000 mg / L, a free oil concentration of 500-1500 mg / L, a benzene concentration of 100-700 mg / L, and a pH of 13-14.

4. The device according to claim 3, characterized in that An inclined plate filler (111) is arranged below the water distribution ring pipe (109). Small oil particles in the waste alkali solution that are difficult to float up are gathered into large oil particles through the inclined plate filler (111) and float up, thereby separating oil and water. The surface hydraulic load of the inclined plate area of ​​the oil removal section is 0.6m 3 / (m 2 ·h)-0.8m 3 / (m 2 h).

5. The device according to claim 2, characterized in that In the integrated device, 1 to 4 groups of the oil removal sections (1) are stacked, and a water distribution component is arranged above the top group of oil removal sections (1); the waste alkali liquid overflows from the water inlet tank (102) to 1 to 4 water distribution tanks (103) of the same specification, and partitions are arranged between the water inlet tank and the water distribution tank and between the water distribution tanks; four water distribution ports (104) of equal height are respectively connected to the four groups of oil removal section waste alkali liquid feed ports (105) through external pipes; each group of oil removal waste alkali liquid outlets (115) are connected to the debenzene section waste alkali liquid outlet port (115) through external pipes. The feed port (201) is connected; the dirty oil outlet (119) of each group of oil removal sections is connected to the dirty oil inlet (301) of the dirty oil section (3) through an external pipeline; the gas phase communication port (121) of each group is connected to the waste gas outlet (303) of the dirty oil section through an external pipeline; when multiple groups are stacked, the gas phase of each group is connected to the gas phase communication port (121) of the top group, and the gas phase space of the top group is also provided with a top gas phase port (126), a pressure transmitter port (127) and an emergency discharge manhole (129).

6. The device according to claim 5, characterized in that The oil-water distributor (106) is provided in the oil removal section (1); The waste alkali solution has a sulfide concentration of 4000-15000 mg / L, a COD concentration of 12000-45000 mg / L, a free oil concentration of 500-1500 mg / L, a benzene concentration of 100-700 mg / L, and a pH of 13-14.

7. The device according to claim 4 or 6, characterized in that The debenzene section (2) comprises a debenzene section waste alkali liquid feed port (201), a nitrogen inlet (202), an aeration main pipe (203), an aeration branch pipe (204), an aeration hole (205), a debenzene waste alkali liquid outlet (206), a thermometer port (207), a level gauge upper flange port (208), a level gauge lower flange port (209), a debenzene section waste gas outlet (210), a breathing valve port (211), and an inspection port (212); The waste alkali liquid feed port (201) of the debenzene section is located in the middle and lower part of the debenzene section, and is connected to the waste alkali liquid outlet (115) of oil removal through an external pipeline; the nitrogen inlet (202) is located in the lower part of the debenzene section, the nitrogen inlet (202) is connected to the aeration main pipe (203), and a plurality of equidistant aeration branch pipes (204) are vertically connected to the aeration main pipe (203); the aeration holes (205) are evenly distributed along the aeration branch pipes (204), and are alternately opened at an angle of about 45° downward relative to the vertical line of the center of the aeration pipe, for nitrogen aeration to remove the residual benzene in the waste alkali liquid to the gas phase; The outlet (206) of the waste alkali liquid for benzene removal is connected to an external waste alkali liquid lifting pump; the side wall is provided with a thermometer port (207), a liquid level gauge upper flange port (208), and a liquid level gauge lower flange port (209) for monitoring the liquid level and temperature; the waste gas outlet (210) of the benzene removal section is used to discharge the waste gas; the breathing valve port (211) is used for overpressure exhaust and low-pressure intake; and the inspection port (212) is used for equipment maintenance.

8. The device according to claim 7, characterized in that The operating temperature of the debenzene section is 50-60°C.

9. The device according to claim 8, characterized in that The debenzene section (2) is aerated with an inert gas at a pressure not exceeding 3 kg during operation, and the aeration intensity is 4-10 Nm 3 / m 2 ·h.

10. A biochemical system for catalytic oxidation of high-sulfur ethylene waste alkali liquor, characterized in that: The system comprises in sequence: The integrated equipment for deoiling and debenzenizing high sulfur ethylene waste alkali liquor according to any one of claims 1 to 9; desulfurization reactor; and Aerobic biochemical reactor; Among them, the sulfide concentration of the high-sulfur ethylene waste alkali liquid feed of the high-sulfur ethylene waste alkali liquid deoiling and debenzening integrated equipment is between 4000-15000 mg / L, the COD concentration is between 12000-45000 mg / L, the free oil concentration is between 500-1500 mg / L, the benzene concentration is between 100-700 mg / L, and the pH is 13-14; the operating temperature of the debenzening section of the high-sulfur ethylene waste alkali liquid deoiling and debenzening integrated equipment is 50-60°C; the operating temperature of the desulfurization reactor does not exceed 80°C.

Images