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Waste alkali wet oxidation system and method

An oxidation system, wet technology, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of easy fouling of heat exchange tubes, poor oxidation effect, high energy consumption in operation, etc. , to achieve the effect of improving long-term stable operation time, large amount of waste lye, and improving heat exchange efficiency

Pending Publication Date: 2022-02-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies in the prior art, the present invention provides a waste alkali wet oxidation system and method, which solves the problem of easy fouling and clogging of heat exchange tubes in the prior art, high operating energy consumption, poor oxidation effect, unstable operation, Insufficient operation flexibility and difficult control

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  • Waste alkali wet oxidation system and method
  • Waste alkali wet oxidation system and method

Examples

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Embodiment approach

[0049] According to another specific embodiment of the present invention, there are three oxygen-containing gas inlets, two of which are respectively arranged upstream and downstream of the heat transfer medium / feed heat exchanger, and the other is arranged at the heat transfer medium / feed heat exchange There are multiple injection points on the heat transfer medium / feed heat exchanger.

[0050] Depending on the composition of the reaction raw materials, the oxygen-containing gas enters the waste lye delivery pipeline through different oxygen-containing gas inlets, for example: when the content of butter and olefins in the reaction raw materials is high, you can choose to use the heat transfer medium / feed heat exchanger Inject oxygen-containing gas into the oxygen-containing gas inlet on the front and / or the oxygen-containing gas inlet on the heat transfer medium / feed heat exchanger to avoid fouling of the heat exchanger.

[0051] According to a specific embodiment of the pres...

Embodiment 1

[0071] Such as figure 1 As shown, a waste alkali wet oxidation system includes a reaction raw material feed system, a reaction system, a heat transfer medium heat exchange system and a product separation system;

[0072] The reaction raw material feed system includes an oxygen-containing gas supply system and a waste lye supply system, the oxygen-containing gas supply system includes an oxygen-containing gas delivery pipeline, and the waste lye supply system includes a waste lye delivery pipeline, the Two oxygen-containing gas inlets are arranged on the waste lye delivery pipeline, and the oxygen-containing gas delivery pipeline is connected with the oxygen-containing gas inlet;

[0073]Described reaction system comprises reactor 102, and the discharge end of described waste lye delivery pipeline links to each other with the reaction raw material inlet of reactor 102 bottoms, and the top of described reactor 102 is provided with reaction product outlet pipeline, and the reacti...

Embodiment 2

[0099] like figure 2 As shown, compared with Example 1, the spent alkali wet oxidation system of this example is the same as Example 1 except that the reactor 102 adopts the form of empty barrel + distributor 301 .

[0100] The spent lye of this embodiment is also ethylene spent lye, and the composition and flow rate of the spent lye are the same as in Example 1, the difference being that the reaction temperature of the reactor 102 is 190°C, the reaction pressure is 3.35MPaG, and the feed The outlet pressure of the pump 104 is 3.75MPaG; the outlet pressure of the gas compressor 101 is 3.9MPaG. All the other process parameters and equipment models are the same as in Example 1, and no additional steam is needed during normal reactions in this example.

[0101] In this embodiment, desalted water is used as the heat transfer medium, and the flow rate is 42t / h. The heat transfer medium circulation pump 111 is a centrifugal pump, the pump inlet pressure is 0.5MPa, and the pump out...

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Abstract

The invention relates to the technical field of waste alkali wet oxidation, and discloses a waste alkali wet oxidation system and method. The system is characterized in that an oxygen-containing gas supply system comprises at least one oxygen-containing gas conveying pipeline, wherein at least two oxygen-containing gas inlets are formed in a waste alkali liquid conveying pipeline of a waste alkali liquid supply system; the oxygen-containing gas conveying pipeline is connected with the oxygen-containing gas inlet; the waste alkali liquor conveying pipeline is connected with a reactor of the reaction system, and a reaction product outlet pipeline of the reactor is connected with the product separation system; a heat-conducting medium circulating pipeline of the heat-conducting medium heat exchange system is connected with a reaction product outlet pipeline through a heat-conducting medium / reaction product heat exchanger, and is connected with a waste alkali liquid conveying pipeline through a heat-conducting medium / feeding heat exchanger; the oxygen-containing gas inlets are formed in the upstream and downstream of the heat-conducting medium / feeding heat exchanger and the optional heat-conducting medium / feeding heat exchanger. The system and the method are low in energy consumption, can prevent blockage of the pipelines and equipment, and can work stably.

Description

technical field [0001] The invention relates to the technical field of waste alkali wet oxidation, in particular to a waste alkali wet oxidation system and method. Background technique [0002] In coal chemical, petrochemical and other processing processes, sodium hydroxide is usually used to remove sulfide and acidic substances in oil products, resulting in a large amount of waste lye. This kind of waste lye has the characteristics of complex composition, high COD, and is not easy to degrade. It also contains high concentrations of inorganic salts, sulfides, sodium hydroxide, benzene, phenols, petroleum and other harmful substances. [0003] At present, there are three main treatment methods for waste lye: wet oxidation method, neutralization method and incineration method. The wet oxidation method is to use oxygen as the oxidant to convert the disulfide in the waste alkali into sulfide and oxidize the organic matter into water and carbon dioxide under the condition of hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F9/10C02F103/34C02F103/36
CPCC02F1/727C02F1/06C02F2103/34C02F2103/365C02F2209/02C02F2209/03
Inventor 宋健健刘天竺张旭蹇江海安景辉秦永强
Owner CHINA PETROLEUM & CHEM CORP
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