BG3508U1 - System for thermal regeneration of zeolite and sand adsorbent of petroleum derivatives - Google Patents

Abstract

The utility model relates to a system for thermal regeneration of zeolite and sand adsorbents of petroleum products, which does not require the disposal of adsorbents, as they can be reused after regeneration. This system comprises a pipeline-connected thermal regenerator (1) equipped with a heat source, a seven-stage cooling housing (2) equipped with a cooling source, a scrubber for droplet separation of the petroleum derivatives, which is equipped with a centrifugal pump, housing separation and dehydration of the petroleum products.

Description

Field of technology

The utility model refers to a system for thermal regeneration of zeolite and sand adsorbent of petroleum derivatives. It is used in the processing industry and refers to the purification of zeolite and sand adsorbents used for extraction of petroleum derivatives from contaminated industrial surfaces and sites due to spills and leaks.

BACKGROUND OF THE INVENTION

When removing petroleum derivatives from contaminated industrial surfaces and sites, adsorbing zeolites and sands are used. Subsequently, they are deposited in special landfills, after which some of them are processed by the following technological methods.

The sand adsorbents are washed with solvents, then dried and can be reused as intended. Zeolite adsorbents are compressed, thus extracting petroleum derivatives. The petroleum derivatives extracted from them are subjected to further processing by dissolution, mainly by distillation and rectification. The main disadvantage is that during the pressing of the zeolite adsorbents, in addition to the extraction of the petroleum derivatives, the microporous structure of the zeolite adsorbent is also destroyed. The residual material is partially processed and disposed of, or disposed of directly without treatment on a hazardous waste site, as it is unfit for reuse.

Technical essence of the utility model

The purpose of the utility model is to create a system for thermal regeneration of zeolite and sand adsorbent of petroleum derivatives, which does not violate the structure of the zeolite adsorbent and allows after regeneration its repeated full use as intended.

The problem is solved by creating a system for thermal regeneration of zeolite and sand adsorbent of petroleum derivatives, which includes a thermal regenerator, a vessel made of metal, a double arcuate convex bottom, double cylindrical wall and unloading hatch for ad. Preferably, the metal used is stainless heat-resistant steel. Each of the double bottom and the double wall consists of an inner and an outer wall spaced apart, with a heat exchange fluid in the gap between the inner and outer walls. A heat source is provided to the double bottom and the double wall to heat the heat exchange fluid in the gap. The heat source heats the adsorbent through the inner wall of the double bottom to a temperature in the range of 350-380 ° C. It is possible to have a stirrer in the thermal regenerator to mix the adsorbent. The thermal regenerator is connected via a pipeline to a seven-stage cooling housing, a cooling source is provided to reduce the steam flow rate of petroleum derivatives. The seven-stage cooling housing is placed at an angle to drain condensate to the scrubber for dripping petroleum derivatives is a forced circulation of spray agent. The seven-stage cooling housing includes a casing and one or more cooling pipes, and is provided with a cooling source connected to the cooling pipes, and is connected to a pipeline to the scrubber for dripping petroleum derivatives is forced circulation of spray agent, which is equipped with a centrifugal pump , through which the pipeline is functionally connected is the housing separation and dehydration of petroleum products. The adsorbent, by means of this system for thermal regeneration of zeolite and sand adsorbent of petroleum derivatives, can be reused as intended.

In a preferred embodiment, the heat source is a propane-butane cylinder connected by a soft and / or hard connection is a burner provided to the double arcuate protruding bottom of the thermal regenerator. In this embodiment, the heat exchange fluid represents the exhaust gases from the burner, and the thermal regenerator is designed as an outlet for removing the exhaust gases from the burner.

Descriptions of utility registration certificates № 04.1 / 15.04.2020

In a preferred embodiment, the cooling source is an air cooling system consisting of one or more motors and one or more fans connected by a diffuser to the seven-stage cooling housing, as well as one or more distributors and one or more air flow vortices. in the seven-stage cooling housing. In this embodiment, this housing is designed as an outlet for removing the heated cooling air flow.

In a preferred embodiment, the oil derivative drip scrubber is a forced circulation of spray agent, the centrifugal pump is connected via two lines - one for draining the oil derivatives from the scrubber 3 to the pump 4, and a second for draining the oil derivatives from the pump 4 back to the scrubber 3, thus ensuring the return of the oil derivatives to the scrubber 3. In this embodiment, the centrifugal pump 4 is connected via a third pipeline to the housing for gravity separation and dehydration of oil derivatives 5, and on this pipeline is placed and a check valve, for passing oil derivatives through the third pipeline to the gravity separation and dehydration housing of oil derivatives 5 when the oil derivatives reach a certain maximum level of the lower part of the scrubber 3, and filling it.

When implementing the system described above, there is no need to deposit adsorbents of petroleum products in landfills for hazardous waste, as the adsorbents are regenerated and reused.

Explanation of the attached figure

Figure 1 shows a flow chart of the system for thermal regeneration of zeolite and sand adsorbent of petroleum derivatives, according to the utility model.

Examples of implementation of the utility model

The system for thermal regeneration of zeolite and sand adsorbent of petroleum derivatives, according to the utility model, consists of series-connected by pipelines:

- thermal regenerator 1, which is a vessel made of metal, has a double arcuate convex bottom, a double cylindrical wall and a loading and unloading hatch (not shown in the figure) for adsorbent, with a heat source 6 connected to the double bottom and the double wall so as to heat the adsorbent through the inner wall of the double arcuate convex bottom to a temperature in the range of 350-380 ° C. Preferably, the metal used in the manufacture of the thermal regenerator 1 is stainless heat-resistant steel 309. Each of the double bottom and the double wall is made of an inner and outer wall spaced apart, the space between the inner and outer being intended for circulating heat exchanger. fluid. It is possible to have a stirrer (not shown in the figure) in the thermal regenerator 1 for mixing the adsorbent. Preferably, the thermal regenerator 1 is designed and is a safety valve for discharging fluid at elevated pressure in the regenerator;

- a seven-stage cooling housing 2, which is a device similar to a shell-and-tube heat exchanger placed at an angle to drain condensate to a drip trap for oil derivatives 3, and includes a casing and one or more cooling pipes between which the oil derivative passes in the form on steam. A cooling source 7 is connected to the pipes. Preferably, this cooling source 7 is an air cooling system. Alternatively, an on-site water cooler can be used as a source of water. In a preferred embodiment, the air cooling system includes one or more motors and one or more fans connected by a diffuser to the seven-stage cooler, as well as one or more distributors and one or more air flow swirlers supplied to the seven-stage cooling housing.

2. In this embodiment, the seven-stage cooling housing 2 is designed as an outlet for discharging the heated cooling air flow;

- a scrubber for dripping petroleum derivatives 3 is a forced circulation of a spray agent, which housing is provided with a centrifugal pump 4. In a preferred embodiment, the spray agent is liquefied petroleum derivatives. To the scrubber for dripping oil derivatives 3

11791 Descriptions to utility registration certificates № 04.1 / 15.04.2020 There may also be a safety valve 8 for releasing fluid to the atmosphere in the event of excessive pressure or other system failure. It is possible for the oil derivative drip scrubber 3 to be connected to the centrifugal pump 4 via two lines - one for discharging the liquefied petroleum products from the scrubber 3 to the pump 4, and a second for discharging said liquefied petroleum derivatives as a spray agent from the pump 4 back to the scrubber 3. In this embodiment, the centrifugal pump 4 is connected via a third pipe to the housing for gravity separation and dehydration of petroleum derivatives 5, and on this pipe is placed a check valve to pass the dewatching agent through the third pipe to the housing for gravity separation and dehydration of petroleum products 5 when the level of liquefied petroleum products in the lower part of the scrubber 3 reaches a certain maximum level. In a preferred embodiment, said check valve is controlled by a device connected to a level meter located at the bottom of the scrubber 3. In this way, the correct operation of the scrubber 3 is maintained. In one embodiment, the oil derivative drip scrubber 3 can have one or more layers of ceramic filling to provide a larger mass transfer surface between the vapor rising and the dew liquid coming down;

- housing for gravitational separation and dehydration of petroleum derivatives 5, representing a gravity separator connected to a pipeline through the centrifugal pump 4 with the scrubber for dripping petroleum derivatives 3. In one embodiment, the housing for gravitational separation and dehydration 5 of petroleum there is a level glass for visualization of the boundary between the oil derivatives and the decanted (separated) water.

Action of the utility model

Zeolite and sand material, adsorbed petroleum derivative, is loaded into the thermal regenerator

1. The regenerator 1 charged with the adsorbent used is heated indirectly, by a heat source 6, provided to the double arcuate protruding bottom and / or the double cylindrical wall. Heat exchange fluid 6 heated by the heat source 6 circulates in the space between the walls. The bottom has an arcuate convex shape, because this allows the stresses during heating of the thermal regenerator 1 to be evenly distributed on its housing, and thus due to expansions and contractions due to heating, no deformations occur on the housing of the thermal regenerator 1. The source of heat 6 heats the adsorbent through the inner wall of the double bottom to a temperature of 350-380 ° C, for example 355 ° C or 360 ° C or 365 ° C or 370 ° C or 375 ° C or 380 ° C. The maximum temperature of 380 ° C is the maximum boiling point of petroleum products that are in a liquid state under atmospheric conditions. The temperature minimum of 350 ° C is the minimum temperature for complete regeneration of the adsorbent. The heat sources can be different, preferably using a propane-butane bottle connected by a soft and / or hard connection to a burner provided to the double arcuate protruding bottom of the thermal regenerator 1. In this embodiment, the heat exchange fluid is flue gases from the burner, and the thermal regenerator 1 is designed with an outlet for removing the exhaust gases from the burner.

As a result of heating, the petroleum derivative is separated from the absorbent in the form of steam. This steam then enters through a pipeline in the seven-stage cooling housing 2, where it is cooled by the air cooling system, through the circulating cooling air flow in the pipes of the seven-stage cooling housing 2. The cooling air flow is distributed evenly, like plate indirect heat exchangers. which cool the petroleum derivative in the form of steam indirectly through its walls. As a result, the rate of pomegranate flow of petroleum products is reduced sevenfold, condensed, and partially liquefied. All this is done sequentially in the seven internal stages of the seven-stage cooling housing 2 to avoid the release of vapors of petroleum products into the atmosphere. The heated cooling air stream is subsequently discharged through an outlet made in the seven-stage cooling housing 2. The seven-stage cooling housing 2 is placed at an angle to drain condensate to a scrubber for dripping petroleum derivatives 3. This avoids the possibility of condensation in it.

11792 Descriptions to utility registration certificates № 04.1 / 15.04.2020 fluid to fill the pipes, which will prevent the passage of non-condensed vapors to the scrubber for dripping oil derivatives 3. In this case the safety valve of the regenerator will open due to the increased pressure in it, and the money will go into the atmosphere.

From the seven-stage cooling housing 2 via a pipeline the oil derivative in the form of steam enters a scrubber for dripping oil derivatives 3, in which the flow of liquefied petroleum derivatives is forced to circulate and there it is completely liquefied. The liquid from the scrubber for dripping petroleum derivatives 3, by means of a centrifugal pump 4 through a pipeline is fed into a housing for gravity separation and dehydration of petroleum derivatives 5. There, in the form of water, condensed moisture is separated from petroleum derivatives. the bottom and the oil derivatives from the top, with water and oil derivatives being separated into at least two separate tanks (not shown in the figure). This process allows the adsorbent to be used repeatedly after regeneration instead of being deposited.

The system for thermal regeneration of zeolite and sand adsorbent of petroleum derivatives is periodically active. After separating the petroleum derivatives from the adsorbent, it is removed from the thermal regenerator, which is charged for a new cycle.

It will be apparent to those skilled in the art that various modifications to the system for the thermal regeneration of zeolite and sand adsorbent petroleum derivatives are possible, which also fall within the scope of the utility model defined in the appended claims. All parts of the system can be replaced by technically equivalent elements.

The reference numbers of the technical features are included in the claims, for the sole purpose of increasing the comprehensibility of the claims and, therefore, these reference numbers have no restrictive effect on the interpretation of the elements, these reference numbers are indicated.

Claims (6)

System for thermal regeneration of zeolite and sand adsorbent of petroleum derivatives, characterized in that it comprises a thermal regenerator (1), which is a vessel with a double arcuate convex bottom, a double cylindrical wall and a loading-unloading hatch for the adsorbent, double arcuately convex bottom and the double cylindrical wall are composed of an inner and outer wall spaced apart, with a heat exchange fluid in the gap between the inner and outer wall, and a double arcuate bottom and / or double cylindrical wall provided a heat source (6) for heating the heat exchange fluid in the gap, configured to heat the adsorbent through the inner wall of the double arcuate convex bottom to a temperature range of 350-380 ° C, the thermal regenerator (1) being connected to a pipeline seven-stage cooling housing (2) for reducing the vapor flow rate of petroleum products, which is more placed at an angle for draining condensate and connected to a scrubber for dripping petroleum derivatives (3) is forced circulation of spray agent, the seven-stage cooling housing (2) includes a casing and one or more cooling pipes and is equipped with a cooling source ( 7) connected to the cooling pipes, the scrubber for dripping oil derivatives (3) by means of a centrifugal pump (4) and a pipeline is connected to a housing for gravity separation and dehydration of oil derivatives (5). Thermal regeneration system according to claim 1, characterized in that the thermal regenerator (1) also includes a stirrer for stirring the adsorbent. Thermal regeneration system according to claim 1, characterized in that the walls of the thermal regenerator (1) are made of metal, preferably stainless heat-resistant steel. Thermal regeneration system according to claim 1, characterized in that the heat source (6) is a propane-butane cylinder connected by a soft and / or hard connection is a burner provided to the double arcuate protruding bottom of the thermal regenerator. (1), as the heat exchange fluid is composed of exhaust gases from the burner, and the thermal regenerator (1) is designed as an outlet for the removal of the exhaust gases from the burner. 11793 Descriptions to utility registration certificates № 04.1 / 15.04.2020 Thermal regeneration system according to claim 1, characterized in that the cooling source (7) is an air cooling system consisting of one or more motors and one or more fans connected by a diffuser to the seven-stage cooling housing (2). , as well as one or more distributors and one or more swirlers of the air flow supplied to the seven-stage cooling housing (2), and in that the seven-stage cooling housing (2) is designed with an outlet for discharging the heated cooling air flow. Thermal regeneration system according to Claim 1, characterized in that the centrifugal pump (4) is connected by an additional second line to the oil derivative drip scrubber (3) for discharging the petroleum derivatives back to the petroleum drip scrubber. derivatives (3) as a spraying agent, and on the pipeline connecting the centrifugal pump (4) and the housing for gravity separation and dehydration of petroleum derivatives (5) is placed a check valve for discharge of petroleum derivatives to the housing for gravity separation and dehydrates (5), adapted to be opened after filling the lower part of the scrubber for dripping oil derivatives (3) to a certain level.