Treatment device for methanol-to-olefin waste lye

Abstract

The utility model relates to a treatment device for methanol-to-olefin waste lye. The treatment device comprises an odor oxidation tower, an efficient gas dissolver, an ozone tail gas destructor and an electrochemical reactor, the odor oxidation tower is a hollow shell, and a water distributor is arranged in the odor oxidation tower; the efficient gas dissolver is connected with the odor oxidation tower through a pipeline; the ozone tail gas destructor is of a hollow cylinder structure, the ozone tail gas destructor is arranged at the top of the odor oxidation tower, a gas outlet is formed in the ozone destructor, and the ozone tail gas destructor is connected with the odor oxidation tower through a pipeline; the electrochemical reactor is arranged on the other side of the odor oxidation tower and the high-efficiency gas dissolver; the electrochemical reactor is connected with the odor oxidation tower through a pipeline; by means of the arrangement, a large amount of energy or medicine does not need to be added for treatment, and the methanol-to-olefin waste lye treated through the ozone oxidation method and the electrochemical oxidation method can better enter the next stage to be treated or reach the standard to be discharged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of water pollution treatment especially relates to the processing apparatus of methanol to olefins waste lye. BACKGROUND

[0002] Methanol to olefins is the technology that the methanol synthesized by coal or natural gas is used as raw material to produce ethylene and propylene olefins, and the technology can use non-petroleum resources to produce ethylene, propylene and other products, and has important significance for relieving resource pressure and promoting the development of chemical industry.

[0003] Methanol to olefins waste lye contains trace macromolecular organic matter, and the COD is higher and the pH is also extremely high, if directly using conventional biochemical method, the impact on biochemical system is larger, and microorganism is difficult to survive, therefore low-cost operation. The current common treatment method of methanol to olefins waste lye is incineration method, compared with conventional biochemical treatment method, the incineration method has the advantages of less construction investment, small land occupation, complete wastewater treatment and the like.

[0004] Although the incineration method can decompose most of the pollutants in methanol to olefins waste lye into harmless substances, however, the methanol to olefins waste lye itself has the characteristics of low heat value, and more auxiliary fuel needs to be added in the incineration process, which increases the operation energy consumption and cost, and the flue gas after incineration is easy to cause environmental pollution if not properly treated. UTILITY MODEL CONTENT

[0005] Therefore, the application provides a processing device for methanol to olefins waste lye, which adopts ozone oxidation and electrochemical oxidation method to combine the treatment of methanol to olefins waste lye.

[0006] According to an aspect of the present application, a methanol-to-olefin waste lye treatment device is provided, comprising an odor oxidation tower, an efficient dissolver, an ozone tail gas destroyer and an electrochemical reactor; the odor oxidation tower is provided with a water distributor, which is suitable for uniformly diffusing the methanol-to-olefin waste lye containing ozone to the bottom of the odor oxidation tower; the efficient dissolver is connected with the odor oxidation tower by a pipeline, the efficient dissolver is suitable for being connected with an external ozone generator and a methanol-to-olefin waste lye pump after oil removal pretreatment; the ozone tail gas destroyer is arranged at the top of the odor oxidation tower, an air outlet is formed in the ozone destroyer, and the ozone tail gas destroyer is connected with the odor oxidation tower by a pipeline; the electrochemical reactor is connected with the odor oxidation tower by a pipeline, the electrochemical reactor is provided with an air outlet and a water outlet on the other side of the odor oxidation tower, the air outlet of the electrochemical reactor is suitable for being connected with an external waste gas treatment device, and the water outlet of the electrochemical reactor is suitable for being connected with an external treatment unit.

[0007] In a possible implementation, the odor oxidation tower is provided with a first water inlet, a second water inlet and a first water outlet, the efficient dissolver is provided with a water outlet, a water inlet and an air inlet; the first water inlet of the odor oxidation tower is connected with the water outlet of the efficient dissolver by a pipeline, the first water outlet of the odor oxidation tower is connected with the water inlet of the efficient dissolver by a pipeline, and the air inlet of the efficient dissolver is connected with the ozone generator by a pipeline.

[0008] In a possible implementation, a circulating pump is further arranged on the pipeline between the first water outlet of the odor oxidation tower and the water inlet of the efficient dissolver.

[0009] In a possible implementation, the top of the odor oxidation tower is provided with a first air inlet, the ozone tail gas destroyer is provided with an air inlet, and the first air inlet of the odor oxidation tower is connected with the air inlet of the ozone tail gas destroyer by a pipeline.

[0010] In a possible implementation, the odor oxidation tower is further provided with a second water outlet, a third water outlet and an air inlet, and the electrochemical reactor is further provided with a water inlet; the second water outlet of the odor oxidation tower is connected with the water inlet of the electrochemical reactor by a pipeline, and the third water outlet of the odor oxidation tower is suitable for being connected with an external wastewater pool.

[0011] In a possible implementation, the second water inlet of the odor oxidation tower is suitable for being connected with an external backwashing water pump, and the air inlet of the odor oxidation tower is suitable for being connected with an external fan.

[0012] In a possible implementation, a differential pressure meter is further included, which is arranged on one side of the odor oxidation tower and connected with the odor oxidation tower through a pipeline.

[0013] In a possible implementation, a flow meter is further included, which is arranged between the ozone generator and the high-efficiency gas dissolver.

[0014] In a possible implementation, an ozone inlet valve is arranged between the flow meter and the high-efficiency gas dissolver, a water inlet valve is arranged between the methanol-to-olefins waste alkali solution pump after oil removal pretreatment and the high-efficiency gas dissolver, and a drainage valve is arranged between the odor oxidation tower and the electrochemical reactor.

[0015] In a possible implementation, a backwashing water inlet valve is arranged between the backwashing water pump and the odor oxidation tower, a backwashing drainage valve is arranged between the odor oxidation tower and the waste water pool, and a backwashing air inlet valve is arranged between the odor oxidation tower and the fan.

[0016] The methanol-to-olefins waste alkali solution after oil removal pretreatment enters the high-efficiency ozone oxidation tower, ozone enters the ozone oxidation tower through the high-efficiency gas dissolver, the wastewater in which ozone is dissolved is uniformly diffused to the bottom of the odor oxidation tower through the water distribution device in the ozone oxidation tower, and then the wastewater uniformly rises from the bottom of the odor oxidation tower to the water outlet at the top of the odor oxidation tower, the circulating pump provides the circulating water required by the high-efficiency gas dissolver, the circulating water pump outlet pipeline is connected with the high-efficiency gas dissolver, the methanol-to-olefins waste alkali solution after odor oxidation tower treatment enters the electrochemical reactor, the water flow in the electrochemical reactor passes through the anode and the cathode, and the organic matter and ammonia nitrogen are fully degraded, and finally the methanol-to-olefins waste alkali solution after treatment enters the post-treatment unit or is discharged up to the standard, and the methanol-to-olefins waste alkali solution after ozone oxidation and electrochemical oxidation treatment can better enter the next stage of treatment or be discharged up to the standard. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A specific structure diagram of the methanol-to-olefins waste alkali solution treatment device is shown. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0019] Examples of the described embodiments are illustrated in the accompanying drawings, throughout which like reference characters represent like elements or components or parts or functions with the same or similar meanings throughout the disclosure. The embodiments described below are exemplary and are intended to be illustrative of the present application and are not to be construed as limiting the present application.

[0020] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application or simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0021] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0022] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing", "connection", "hinge" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] As Figure 1As shown, the methanol to olefins waste lye treatment device includes an odor oxidation tower 100, a high-efficiency dissolver 200, an ozone tail gas destroyer 300, and an electrochemical reactor 400; the odor oxidation tower 100 is provided with a water distributor, which is suitable for uniformly diffusing the methanol to olefins waste lye containing ozone to the bottom of the odor oxidation tower; the high-efficiency dissolver 200 is connected with the odor oxidation tower 100 through a pipeline, the high-efficiency dissolver 200 is connected with an external ozone generator 500 and a methanol to olefins waste lye pump 600 after oil removal and pretreatment through a pipeline; the ozone tail gas destroyer 300 is arranged at the top of the odor oxidation tower 100, an air outlet is formed in the ozone destroyer 300, and the ozone tail gas destroyer 300 is connected with the odor oxidation tower 100 through a pipeline; the electrochemical reactor 400 is connected with the odor oxidation tower 100 through a pipeline, and the electrochemical reactor 400 is provided with an air outlet and a water outlet on the other side of the odor oxidation tower 100, the air outlet of the electrochemical reactor 400 is suitable for connecting an external waste gas treatment device, and the water outlet of the electrochemical reactor 400 is suitable for connecting an external treatment unit 800.

[0024] Specifically, the specific structure of the methanol to olefins waste lye treatment device includes an odor oxidation tower 100, a high-efficiency dissolver 200, an ozone tail gas destroyer 300, and an electrochemical reactor 400, the odor oxidation tower 100 provides an ozone oxidation process, the ozone oxidation process includes direct oxidation and indirect oxidation, ozone molecules directly act on the pollutants in the methanol to olefins waste lye, direct oxidation is slow and has a certain selectivity, and can only act on organic pollutants or metal ions containing unsaturated bonds in the methanol to olefins waste lye; indirect oxidation is that ozone is partially decomposed to generate hydroxyl radicals, the hydroxyl radicals are non-selective and can more effectively treat various types of pollutants; the high-efficiency dissolver 200 is arranged to remove suspended solids, organic matter and other pollutants in the methanol to olefins waste lye; the ozone tail gas destroyer 300 is used to destroy the tail gas generated in the reaction process of the odor oxidation tower 100 to meet the standard for high-altitude emission; the electrochemical reactor 400 provides an electrochemical process, and the main reaction mechanism also includes direct oxidation and indirect oxidation, direct oxidation is that H2O and OH - In the anode discharge, the adsorbed hydroxyl radicals are formed, and then the hydroxyl radicals react with organic matter, ammonia nitrogen and the like in the high-salinity wastewater to generate carbon dioxide and nitrogen gas; indirect oxidation is that strong oxidants such as hypochlorite and ozone are generated through the reaction between electrodes, the substances are fully mixed in water to oxidize organic matter, ammonia nitrogen and other pollutants to generate carbon dioxide and nitrogen gas.

[0025] In order to enable the overall use of the odor oxidation tower 100, the high-efficiency gas dissolver 200, the ozone tail gas destroyer 300 and the electrochemical reactor 400, the high-efficiency gas dissolver 200 is arranged on the left side of the odor oxidation tower 100, and the high-efficiency gas dissolver 200 is connected with the odor oxidation tower 100 through a pipeline, the ozone tail gas destroyer 300 is arranged on the top of the odor oxidation tower 100, and the ozone tail gas destroyer 300 is connected with the odor oxidation tower 100 through a pipeline, and the electrochemical reactor 400 is arranged on the right side of the odor oxidation tower 100, and the electrochemical reactor 400 is connected with the odor oxidation tower 100 through a pipeline; the high-efficiency gas dissolver 200 is connected with an external ozone generator 500 and an oil-removed methanol-to-olefins waste alkali solution pump 600 through a pipeline, and ozone and oil-removed methanol-to-olefins waste alkali solution enter the odor oxidation tower 100 through the high-efficiency gas dissolver 200, an air outlet is arranged on the ozone destroyer 300 and is used for discharging waste gas, the electrochemical reactor 400 is provided with an air outlet and a water outlet, the air outlet of the electrochemical reactor 400 is connected with an external waste gas treatment device and is used for next work, and the water outlet of the electrochemical reactor 400 is connected with an external treatment unit and is used for next treatment.

[0026] In a possible implementation, the odor oxidation tower 100 is provided with a first water inlet 110, a second water inlet 120 and a first water outlet 130, and the high-efficiency gas dissolver 200 is provided with a water outlet 210, a water inlet 220 and an air inlet 230; the first water inlet 110 of the odor oxidation tower 100 is connected with the water outlet 210 of the high-efficiency gas dissolver 200 through a pipeline, the first water outlet 130 of the odor oxidation tower 100 is connected with the water inlet 220 of the high-efficiency gas dissolver 200 through a pipeline, and the air inlet 230 of the high-efficiency gas dissolver 200 is connected with the ozone generator 500 through a pipeline; a circulating pump 700 is further arranged on the pipeline between the first water outlet 130 of the odor oxidation tower 100 and the water inlet 220 of the high-efficiency gas dissolver 200.

[0027] Specifically, as shown in FIG. 1, the odor oxidation tower 100 is connected with the high-efficiency gas dissolver 200 through a pipeline, the high-efficiency gas dissolver 200 is connected with the ozone generator 500 through a pipeline, and the ozone generator 500 is connected with the electrochemical reactor 400 through a pipeline. Figure 1As shown, in order to make the whole more complete, by the above connection mode, the methanol to olefins waste lye after oil removal is connected into the ozone oxidation tower 100 through the high-efficiency dissolver 200, the ozone is connected into the ozone oxidation tower 100 through the high-efficiency dissolver 200, the methanol to olefins waste lye dissolved with ozone is uniformly diffused to the bottom of the ozone oxidation tower 100 through the water distribution device in the ozone oxidation tower 100, and then the methanol to olefins waste lye uniformly rises from the bottom of the ozone oxidation tower 100 to the first water outlet 130 at the top of the ozone oxidation tower 100, and then is circulated into the high-efficiency dissolver 200 through the circulating pump 700, and the first water inlet 110, the second water inlet 120 and the first water outlet 130 on the ozone oxidation tower 100 are all arranged on the left side of the ozone oxidation tower 100, the first water inlet 110 on the ozone oxidation tower 100 is arranged above the second water inlet 120 on the ozone oxidation tower 100, the first water outlet 130 on the ozone oxidation tower 100 is arranged above the first water inlet 110 on the ozone oxidation tower 100, and there is a certain distance between the first water outlet 130 and the first water inlet 110.

[0028] In a possible implementation, the top of the ozone oxidation tower 100 is provided with a first gas inlet 140, the ozone tail gas destroyer 300 is provided with a gas inlet 310, and the first gas inlet 140 of the ozone oxidation tower 100 and the gas inlet 310 of the ozone tail gas destroyer 300 are connected through pipelines.

[0029] Specifically, as shown in Figure 1 The ozone oxidation tower 100 and the ozone tail gas destroyer 300 are more specifically connected in that the first gas inlet 140 of the ozone oxidation tower 100 and the gas inlet 310 of the ozone tail gas destroyer 300 are connected through pipelines.

[0030] In a possible implementation, the ozone oxidation tower 100 is further provided with a second water outlet 150, a third water outlet 160 and a gas inlet 170, and the electrochemical reactor 400 is further provided with a water inlet; the second water outlet 150 on the ozone oxidation tower 100 is connected with the water inlet on the electrochemical reactor 400 through pipelines, the third water outlet 160 on the ozone oxidation tower 100 is suitable for connecting an external wastewater pool; the second water inlet 150 on the ozone oxidation tower 100 is suitable for connecting an external backwashing water pump 800, and the gas inlet 170 on the ozone oxidation tower 100 is used for connecting an external fan; further comprising a differential pressure meter 180, which is arranged on one side of the ozone oxidation tower 100 and connected with the ozone oxidation tower 100 through pipelines.

[0031] Specifically, as shown in Figure 1As shown, after the reaction in the ozone oxidation tower 100, the wastewater enters the electrochemical reactor 400 through the second outlet 150 on the ozone oxidation tower 100 for electrochemical reaction. During operation, insoluble substances such as impurities or dirt from the wastewater may slowly adsorb into the ozone oxidation tower 100, affecting the effluent and exhaust. Over time, this will cause the pressure in the differential pressure gauge 180 to rise. Once the pressure rises to the set value, the backwashing function will be activated. Backwashing removes these impurities and dirt through acid... The solution is dissolved in an alkaline manner and then discharged into a wastewater pond. The second outlet 150, the third outlet 160, and the air inlet 170 on the odor oxidation tower 100 are all located on the right side of the odor oxidation tower 100. The second outlet 150 is located at the top right side of the odor oxidation tower 100, the third outlet 160 is located below the second outlet 150, and the air inlet 170 is located below the third outlet 160. There is a certain distance between the air inlet 170 and the third outlet 160.

[0032] In one possible implementation, a flow meter 190 is also included, which is disposed between the ozone generator and the high-efficiency dissolved air device 200.

[0033] Specifically, such as Figure 1 As shown, a flow meter 190 was installed in order to observe the ozone flow rate.

[0034] In one possible implementation, an ozone inlet valve 810 is installed between the flow meter and the high-efficiency dissolved air unit; a water inlet valve 820 is installed between the methanol-to-olefins waste alkali liquid pump after oil removal pretreatment and the high-efficiency dissolved air unit; a drain valve 830 is installed between the odor oxidation tower and the electrochemical reactor; a backwash water inlet valve 840 is installed between the backwash water pump and the odor oxidation tower; a backwash drain valve 850 is installed between the odor oxidation tower and the wastewater pool; and a backwash air inlet valve 860 is installed between the odor oxidation tower and the blower.

[0035] Specifically, such as Figure 1 As shown, the ozone inlet valve 810, water inlet valve 820, drain valve 830, backwash water inlet valve 840, backwash drain valve 850, and backwash air inlet valve 860 are all designed to control the flow rate of water, water, and gas.

[0036] This application, through the above settings, eliminates the need for large amounts of energy or chemicals for treatment. The methanol-to-olefins waste alkaline liquid treated by ozone oxidation and electrochemical oxidation can better proceed to the next stage of treatment or meet emission standards. This solves the technical problems of requiring more auxiliary fuel in the incineration process, which increases operating energy consumption and costs, and the fact that improper treatment of flue gas emissions after incineration can easily cause pollution to the surrounding environment.

[0037] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and concept of the present application, makes equivalent replacement or change within the scope disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A device for treating methanol-to-olefins waste alkaline solution, characterized in that, This includes odor oxidation towers, high-efficiency dissolved air reactors, ozone tail gas destroyers, and electrochemical reactors; The odor oxidation tower is equipped with a water distributor, which is suitable for evenly dispersing the ozone-containing methanol-to-olefins waste alkaline liquid to the bottom of the odor oxidation tower. The high-efficiency dissolved gas device is connected to the ozone oxidation tower by a pipeline. The high-efficiency dissolved gas device is suitable for connecting to the external ozone generator and the pump pipeline of methanol-to-olefins waste alkaline liquid after oil removal pretreatment. The ozone exhaust gas destroyer is installed at the top of the ozone oxidation tower. The ozone exhaust gas destroyer has an outlet and is connected to the ozone oxidation tower by a pipeline. The electrochemical reactor is connected to the odor oxidation tower by a pipeline. The electrochemical reactor and the odor oxidation tower are provided with an air outlet and a water outlet on the other side. The air outlet of the electrochemical reactor is suitable for connecting to an external waste gas treatment device, and the water outlet of the electrochemical reactor is suitable for connecting to an external treatment unit.

2. The apparatus for treating methanol-to-olefins waste alkaline solution according to claim 1, characterized in that, The odor oxidation tower is provided with a first water inlet, a second water inlet and a first water outlet, and the high-efficiency dissolved air device is provided with a water outlet, a water inlet and an air inlet; The first inlet of the odor oxidation tower is connected to the outlet of the high-efficiency dissolved air device via a pipeline, the first outlet of the odor oxidation tower is connected to the inlet of the high-efficiency dissolved air device via a pipeline, and the inlet of the high-efficiency dissolved air device is connected to the ozone generator via a pipeline.

3. The apparatus for treating methanol-to-olefins waste alkaline solution according to claim 2, characterized in that, A circulation pump is also provided, which is installed on the pipeline between the first outlet of the odor oxidation tower and the inlet of the high-efficiency dissolved air device.

4. The apparatus for treating methanol-to-olefins waste alkaline solution according to any one of claims 1-3, characterized in that, The top of the odor oxidation tower is provided with a first air inlet, and the ozone exhaust gas destroyer is provided with an air inlet. The first air inlet of the odor oxidation tower and the air inlet of the ozone exhaust gas destroyer are connected by a pipeline.

5. The apparatus for treating methanol-to-olefins waste alkaline solution according to claim 4, characterized in that, The odor oxidation tower is also equipped with a second water outlet, a third water outlet, and an air inlet, and the electrochemical reactor is also equipped with a water inlet; The second outlet of the odor oxidation tower is connected to the inlet pipe of the electrochemical reactor, and the third outlet of the odor oxidation tower is suitable for connecting to an external wastewater pool.

6. The apparatus for treating methanol-to-olefins waste alkaline solution according to claim 5, characterized in that, The second water inlet on the odor oxidation tower is for connecting to an external backwash water pump, and the air inlet on the odor oxidation tower is for connecting to an external fan.

7. The apparatus for treating methanol-to-olefins waste alkaline solution according to claim 6, characterized in that, It also includes a differential pressure gauge, which is installed on one side of the odor oxidation tower and is connected to the odor oxidation tower by a pipeline.

8. The apparatus for treating methanol-to-olefins waste alkaline solution according to claim 6, characterized in that, It also includes a flow meter, which is disposed between the ozone generator and the high-efficiency dissolved air device.

9. The apparatus for treating methanol-to-olefins waste alkaline solution according to claim 8, characterized in that, An ozone inlet valve is provided between the flow meter and the high-efficiency dissolved air device; a water inlet valve is provided between the methanol-to-olefins waste alkali liquid pump after oil removal pretreatment and the high-efficiency dissolved air device; and a drain valve is provided between the odor oxidation tower and the electrochemical reactor.

10. The apparatus for treating methanol-to-olefins waste alkaline solution according to claim 9, characterized in that, A backwash inlet valve is installed between the backwash water pump and the odor oxidation tower, a backwash drain valve is installed between the odor oxidation tower and the wastewater pool, and a backwash air inlet valve is installed between the odor oxidation tower and the blower.

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