阅读说明：本技术 一种双氧水生产中氧化尾气的处理方法 (Method for treating oxidized tail gas in hydrogen peroxide production ) 是由 李恩平 张正江 施以军 于 2019-11-18 设计创作，主要内容包括：本发明提供双氧水生产中氧化尾气的处理方法,将一级处理过后的氧化尾气送入气液分离罐的进口,气液分离罐的进口通过进气管路进入气液分离罐内,在进气管路端部安装过滤器,在过滤器上方的气液分离罐内设置分隔板,将罐体内分隔成上下两部分,出口设置在罐体顶部,人孔设置在进口一侧并位于分隔板下方。本发明回收芳烃液体温度可以有效的作为冷媒介质进行换热,达到能耗的综合利用,利用价值非常可观。(The invention provides a method for treating oxidized tail gas in hydrogen peroxide production, which comprises the steps of feeding the oxidized tail gas after primary treatment into an inlet of a gas-liquid separation tank, enabling the inlet of the gas-liquid separation tank to enter the gas-liquid separation tank through an air inlet pipeline, installing a filter at the end part of the air inlet pipeline, arranging a partition plate in the gas-liquid separation tank above the filter, dividing the interior of the tank into an upper part and a lower part, arranging an outlet at the top of the tank, and arranging a manhole at one side of the inlet and below the partition plate. The temperature of the recovered aromatic hydrocarbon liquid can be effectively used as a refrigerant medium for heat exchange, so that the comprehensive utilization of energy consumption is achieved, and the utilization value is considerable.)

1. A method for treating oxidized tail gas in hydrogen peroxide production is characterized by comprising the following steps: the oxidation tail gas after the first-stage treatment is sent into an inlet of a gas-liquid separation tank, the inlet of the gas-liquid separation tank enters the gas-liquid separation tank through a gas inlet pipeline, a filter is installed at the end part of the gas inlet pipeline, a separation plate is arranged in the gas-liquid separation tank above the filter to separate the tank into an upper part and a lower part, an outlet is arranged at the top of the tank, and a manhole is arranged on one side of the inlet and is positioned below the separation plate.

2. The method for treating the oxidized tail gas in the hydrogen peroxide production according to claim 1, which is characterized by comprising the following steps: the filter adopts a fiber type gas-liquid coalescence filter element.

3. The method for treating the oxidized tail gas in the hydrogen peroxide production according to claim 1, which is characterized by comprising the following steps: the outlet does not include a layer of wire mesh packing.

4. The method for treating the oxidized tail gas in the hydrogen peroxide production according to claim 1, which is characterized by comprising the following steps: the air inlet pipeline comprises a horizontal pipe, a vertical pipe and an arc-shaped bent pipe for connecting the horizontal pipe and the vertical pipe, one end of the horizontal pipe is connected with the inlet, and one end of the vertical pipe is connected with the filter.

Technical Field

The invention relates to a method for treating oxidized tail gas in hydrogen peroxide production, and belongs to the technical field of hydrogen peroxide production.

Background

The industrial production method of hydrogen peroxide mainly comprises an electrolytic method, an anthraquinone method, an isopropanol method, a cathode anode reduction method, a direct hydrogen-oxygen method and the like. The electrolysis method has high current efficiency, short process flow and high product quality, but is not suitable for large-scale industrial production and is gradually eliminated due to higher power consumption and high production cost; the method for producing hydrogen peroxide by using the oxygen anode reduction method utilizes water and air as raw materials, has the characteristics of low cost, less investment, small pollution and the like, but the method still does not realize industrial production at present. Therefore, the anthraquinone process is the most important process for producing hydrogen peroxide at home and abroad at present.

The production principle of the palladium catalyst fixed bed anthraquinone method hydrogen peroxide is as follows: the method comprises the steps of using alkyl anthraquinone as a carrier, using heavy aromatic hydrocarbon, trioctyl phosphate and dimethyl cyclohexyl acetate as solvents to form working solution, and carrying out hydrogenation reaction on the working solution and hydrogen under certain pressure and temperature in the presence of a palladium catalyst to generate solution (hydrogenation solution for short) containing corresponding alkyl hydroanthraquinone. The hydrogenated liquid and oxygen in the air are subjected to oxidation reaction at a certain temperature and pressure in an oxidation tower to generate hydrogen peroxide; meanwhile, the alkyl hydroanthraquinone is reduced to the original alkyl anthraquinone. Feeding the hydrogen peroxide into an extraction tower by utilizing the different solubility of the hydrogen peroxide in water and working solution, extracting the hydrogen peroxide with deionized water to obtain a hydrogen peroxide solution with the concentration of not less than 27.5 percent (Wt), and purifying the hydrogen peroxide solution by using a solvent to obtain a hydrogen peroxide product; and after the raffinate working solution is subjected to post-treatment and comprehensive treatment, returning the raffinate working solution to a hydrogenation system for hydrogenation, and recycling the working solution in the system.

The gas phase after the oxidation reaction separation, namely the oxidation tail gas, mainly comprises nitrogen, oxygen, aromatic hydrocarbon steam (main component trimethylbenzene) and water vapor, wherein the aromatic hydrocarbon steam is an important solvent of the working solution in the hydrogen peroxide production.

Therefore, a method for recovering more aromatic hydrocarbons, realizing the standard emission of the oxidation tail gas and comprehensively utilizing the energy of the oxidation tail gas is needed, but no technical report for solving the problems in practice exists in the prior art.

Disclosure of Invention

In order to solve the problems in the prior art, the invention aims to provide a method for treating oxidized tail gas in hydrogen peroxide production.

The technical scheme adopted by the invention for solving the problems is as follows: a method for treating oxidized tail gas in hydrogen peroxide production comprises the steps of feeding oxidized tail gas after primary treatment into an inlet of a gas-liquid separation tank, enabling the inlet of the gas-liquid separation tank to enter the gas-liquid separation tank through an air inlet pipeline, installing a filter at the end part of the air inlet pipeline, arranging a separation plate in the gas-liquid separation tank above the filter, separating the tank into an upper part and a lower part, arranging an outlet at the top of the tank, and arranging a manhole at one side of the inlet and below the separation plate.

Further, the filter adopts a fiber type gas-liquid coalescence filter element.

Further, the outlet does not include a wire mesh packing layer.

Furthermore, the air inlet pipeline comprises a horizontal pipe, a vertical pipe and an arc-shaped bent pipe for connecting the horizontal pipe and the vertical pipe, one end of the horizontal pipe is connected with the inlet, and one end of the vertical pipe is connected with the filter.

The beneficial technical effects of the invention are as follows: the temperature of the recovered aromatic hydrocarbon liquid (aromatic hydrocarbon and water) can be effectively used as a refrigerant medium for heat exchange, so that the comprehensive utilization of energy consumption is achieved, and the utilization value is considerable.

Drawings

The technical scheme of the invention is described in detail in the following with reference to the accompanying drawings

Fig. 1 is a schematic structural view of the present invention.

In the figure: 1. gas-liquid separation jar, 2, air inlet pipeline, 3, filter, 4, division board.

Detailed Description

As shown in figure 1, the method for treating the oxidized tail gas in hydrogen peroxide production comprises the steps of feeding the oxidized tail gas after primary treatment into an inlet of a gas-liquid separation tank 1, enabling the inlet of the gas-liquid separation tank 1 to enter the gas-liquid separation tank 1 through an air inlet pipeline 2, installing a filter 3 at the end part of the air inlet pipeline 2, arranging a partition plate 4 in the gas-liquid separation tank 1 above the filter 3, dividing the tank body into an upper part and a lower part, arranging an outlet at the top of the tank body, and arranging a manhole at one side of the inlet and below the partition plate 4.

The filter 3 adopts a fiber type gas-liquid coalescence filter element.

The outlet does not include a layer of wire mesh packing.

The air inlet pipeline 2 comprises a horizontal pipe, a vertical pipe and an arc-shaped bent pipe for connecting the horizontal pipe and the vertical pipe, one end of the horizontal pipe is connected with the inlet, and one end of the vertical pipe is connected with the filter 3.

When the oxidized tail gas is discharged, the pressure is certain (4.5-10 kpa, the temperature is 8-15 ℃), the gas quantity is large, the temperature of the recovered aromatic hydrocarbon liquid (aromatic hydrocarbon and water) can be effectively used as a refrigerant medium for heat exchange, the comprehensive utilization of energy consumption is achieved, and the utilization value is considerable.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and their concepts should be equivalent or changed within the technical scope of the present invention.