CN219324216U - Carclazyte bed regeneration recovery system of hydrogen peroxide device - Google Patents

Abstract

The utility model provides a clay bed regeneration recovery system of a hydrogen peroxide device, which comprises a clay bed, a clay bed circulating pump, a clay bed filter, a waste aromatic hydrocarbon tank, a waste working fluid tank, a regeneration steam pipeline and a nitrogen pipeline which are sequentially connected with each other. According to the utility model, the clay bed is pretreated by the system recovery aromatic hydrocarbon, the regenerated steam is utilized for purging, and finally, the nitrogen is utilized for cooling, so that the anthraquinone adsorbed in the clay can be fully recovered, the anthraquinone consumption of the system is reduced, the use amount and the regeneration time of the regenerated steam are reduced, the energy consumption is saved, and the treatment load of a sewage system is reduced, thereby achieving the purposes of energy conservation and consumption reduction.

Description

Carclazyte bed regeneration recovery system of hydrogen peroxide device

Technical Field

The utility model belongs to the field of chemical industry, relates to hydrogen peroxide production, and in particular relates to a clay bed regeneration and recovery system of a hydrogen peroxide device.

Background

At present, most of domestic hydrogen peroxide production devices adopt an anthraquinone method fixed bed process, 2-ethyl anthraquinone is adopted as a carrier, and a plurality of C9-C10 heavy aromatics, trioctyl phosphate, o-methylcyclohexyl acetate and tetrabutyl urea are adopted as solvents to prepare working solution, and industrial hydrogen peroxide products are obtained through the procedures of hydrogenation, oxidation, extraction, purification and the like.

In the hydrogen peroxide production process, activated alumina is also called clay, and is used as a degradation product in the regenerated working solution. In order to ensure stable components of the working solution of the system, the clay bed needs to be regenerated and replaced regularly, because the clay belongs to a porous structure, a large amount of anthraquinone organic matters are often adsorbed in the clay, and in order to ensure that the clay is sent out in a solid waste mode, a large amount of steam is often adopted for long-time purging, so that a large amount of steam resources are consumed, and high COD condensate wastewater is also generated.

Disclosure of Invention

The utility model provides a clay bed regeneration recovery system of a hydrogen peroxide device, which adopts aromatic hydrocarbon recycled by the system to circularly soak and dissolve anthraquinone substances adsorbed in the clay bed, and then effectively reduces steam consumption, wastewater production and anthraquinone consumption by means of steam purging and nitrogen cooling.

The technical scheme of the utility model is that a clay bed, a clay bed circulating pump, a clay bed filter, a waste aromatic hydrocarbon tank, a waste working fluid tank, a regenerated steam pipeline and a nitrogen pipeline at the top of the clay bed are sequentially connected.

The clay bed regeneration and recovery system of the hydrogen peroxide device is characterized in that the bottom of the clay bed is connected with a waste working solution tank through a pipeline;

the bottom of the clay bed is connected with a clay circulating pump through a pipeline, and the clay circulating pump is connected with the top of the clay bed through a pipeline.

The clay circulating pump and the clay bed top connecting pipeline are connected in parallel and provided with clay filters.

The bottom of the clay bed is connected with the waste aromatic hydrocarbon tank through a pipeline.

The top of the clay bed is provided with a regeneration steam pipeline and a nitrogen pipeline.

According to the utility model, the clay bed is pretreated by the system recovery aromatic hydrocarbon, the regenerated steam is utilized for purging, and finally, the nitrogen is utilized for cooling, so that the anthraquinone adsorbed in the clay can be fully recovered, the anthraquinone consumption of the system is reduced, the use amount and the regeneration time of the regenerated steam are also reduced, the energy consumption is saved, and the treatment load of a sewage system is reduced, thereby achieving the purposes of energy conservation and consumption reduction.

Further, the system also comprises a recovery aromatic hydrocarbon from the system which is soaked and cleaned, and the cleaned aromatic hydrocarbon is used for preparing working solution and returning to the system for reuse.

Further, the source of recovered aromatic hydrocarbon is oxidized tail gas recovery and purification tower recovery.

The utility model has the following beneficial effects:

1. the utility model adopts the treatment scheme of aromatic hydrocarbon dissolution and soaking, can effectively recycle anthraquinone substances adsorbed in clay, and can reduce the consumption of anthraquinone from 0.5kg/t to 0.4kg/t.

2. The conventional steam regenerated clay bed needs 1.3t/t steam unit consumption, taking 100 tons of clay as an example, and 130 tons of regenerated steam are needed for complete regeneration. The utility model carries out regeneration after dissolution and soaking, reduces the steam unit consumption to 1t/t, and reduces the steam consumption by about 30 percent

3. The regeneration wastewater quantity is reduced from 10t/h to 7t/h, and the operation load of wastewater treatment is greatly reduced.

Drawings

Fig. 1 is a schematic diagram of the system of the present utility model. Wherein, 1, a regeneration steam pipeline, 2, a nitrogen pipeline, 3, a clay bed, 4, a clay circulating pump, 5, a clay filter, 6, a waste aromatic hydrocarbon tank, 7 and a waste working fluid tank.

Detailed Description

Embodiments of the present utility model will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only for illustrating the present utility model and should not be construed as limiting the scope of the present utility model.

The utility model discloses a clay bed regeneration and recovery system of a hydrogen peroxide device, wherein the bottom of a clay bed 3 is connected with a waste working fluid tank 7 through a pipeline;

the bottom of the clay bed 3 is connected with a clay circulating pump 4 through a pipeline, and the clay circulating pump 4 is connected with the top of the clay bed 3 through a pipeline.

The clay circulating pump 4 and the clay bed 3 are connected in parallel on the connecting pipeline at the top of the clay bed 3, and a clay filter 5 is arranged.

The bottom of the clay bed 3 is connected with a waste aromatic hydrocarbon tank 6 through a pipeline.

The top of the clay bed 3 is provided with a regeneration steam pipeline 1 and a nitrogen pipeline 2.

In the preferred scheme, the dissolved and soaked aromatic hydrocarbon in the system is derived from the recovered aromatic hydrocarbon in the system, mainly the recovered aromatic hydrocarbon in the oxidized tail gas and the recovered aromatic hydrocarbon in the purifying tower.

In a further preferred scheme, after the aromatic hydrocarbon circularly dissolves anthraquinone substances adsorbed in the clay, the anthraquinone substances enter a waste working solution tank and are sent into a preparation kettle to prepare working solution, and then the working solution returns to the system.

Preferably, the system further comprises a clay bed filter for intercepting clay powder and refractory impurities.

The specific process conditions are as follows:

when the clay bed reaches the service cycle, the clay bed needs to be regenerated and replaced, the materials in the clay bed are firstly removed, then the clay bed is purged by using regenerated steam for 12-16 hours until the COD of the condensate is lower than 200ppm, and then the clay is discharged and packaged after the temperature of the clay bed is reduced to normal temperature by using nitrogen. The steam consumption is about 1.3t/t, and the sewage quantity is 10t/h.

By adopting the system for regenerating the clay bed, firstly, working solution in the clay bed is returned into the system, then, an outlet valve of a waste aromatic hydrocarbon tank is opened, a clay circulating pump is started to add recovered aromatic hydrocarbon into the clay bed, after the clay is completely immersed by the liquid level, a discharge valve at the bottom of the clay bed is opened, and the valve of the waste aromatic hydrocarbon tank is closed, so that the internal circulation of the clay bed is realized. After a period of circulation, finally, the working solution in the clay bed is returned into the waste working solution tank for preparing the working solution.

In a specific case, 100t of activated alumina is filled in the clay bed, about 4t of anthraquinone is recovered through aromatic hydrocarbon cleaning, and the consumption of the whole anthraquinone is reduced by 0.1kg/t; the steam consumption is reduced from 1.3t/t to 1t/t; the waste water amount is reduced from 10t/h to 7t/h.

Claims (1)

1. The utility model provides a hydrogen peroxide solution device carclazyte bed regeneration recovery system which characterized in that: the bottom of the clay bed (3) is connected with a waste working fluid tank (7) through a pipeline;

the bottom of the clay bed (3) is connected with a clay circulating pump (4) through a pipeline, and the clay circulating pump (4) is connected with the top of the clay bed (3) through a pipeline;

a clay filter (5) is arranged on a connecting pipeline between the clay circulating pump (4) and the top of the clay bed (3) in parallel;

the bottom of the clay bed (3) is connected with a waste aromatic hydrocarbon tank (6) through a pipeline;

the top of the clay bed (3) is provided with a regeneration steam pipeline (1) and a nitrogen pipeline (2).

Images