CN210449219U - Heavy distillate oil hydrotreating catalyst reactivation system - Google Patents

Abstract

The utility model provides a heavy distillate oil hydrotreating catalyst system of reviving, including steeping vat and drying equipment, the steeping vat bottom is equipped with the leakage fluid dram, be equipped with the baffle in the steeping vat and separate the steeping vat into two cell bodys, be first cell body and second cell body respectively, be equipped with a filter screen section of thick bamboo in the first cell body, filter screen section of thick bamboo inner wall is equipped with helical blade, the pivot is connected through the link in the both ends of a filter screen section of thick bamboo, the actuating mechanism drive is passed through in the pivot, first cell body both ends are equipped with charge door and bin outlet with a filter screen section of thick bamboo intercommunication, be equipped with the chain conveyer belt who carries the catalyst to the steeping vat outside in the second cell body, chain conveyer belt's output sets up in the feed end top of guipure conveyer, guipure conveyer's output setting. The system is combined with an activity recovery process, and can realize the reactivation of the regenerated catalyst and improve the activity recovery efficiency of the regenerated catalyst.

Description

Heavy distillate oil hydrotreating catalyst reactivation system

Technical Field

The utility model belongs to hydrogenation catalyst's production facility field, in particular to heavy distillate oil hydrotreating catalyst system of reviving.

Background

The hydrotreating process of petroleum fractions is one of the effective means for producing clean fuels, and the core of the hydrotreating process is a hydrotreating catalyst. In the long-term use process, the surface of the catalyst forms macromolecular carbon-containing compounds due to chemical reactions such as condensation, dehydrogenation and the like, covers the active center of the catalyst, reduces the effective surface area of the catalyst reaction, and finally leads the catalyst to lose activity completely. The method recovers the activity of the old catalyst by a regeneration-reactivation means, reduces the treatment of the old catalyst, reduces the operation cost of a refinery, protects the environment and has certain social and economic benefits.

The hydrotreating catalyst contains active component oxides of the VIII family and the VIB family of the periodic table loaded into a carrier, and the carrier generally contains alumina, silica, titania, zirconia and the like. The active components are impregnated on the carrier through an impregnation process flow, and then the finished catalyst is prepared through drying and roasting processes.

The catalyst regeneration mode is divided into two in-reactor regeneration and out-of-reactor regeneration. At present, the regeneration technology outside the device is adopted in the industry, and the advantages are that the local overheating is not easy to generate in the catalyst regeneration process, and the activity is recovered well.

The method for regenerating the catalyst outside the device is mainly used for contacting the catalyst with oxygen in a kiln to remove sulfur and carbon generated on the surface of the catalyst, namely regenerating the catalyst by burning the sulfur and the carbon. Compared with the fresh catalyst, the regenerated catalyst has the advantages of reduced pore volume and specific surface area, and large activity reduction range, and in order to improve the reaction activity of the regenerated catalyst, the activity of the regenerated catalyst needs to be recovered, so that the service performance of the regenerated catalyst is close to the level of the fresh catalyst.

Several methods for restoring the activity of regenerants have also been described in a number of literature patents. US7087546B2 reports a method for regenerating and restoring the activity of an additive-based catalyst, which comprises regenerating a used old catalyst under oxygen at a temperature not exceeding 500 ℃, introducing an organic additive into the catalyst, optionally leaving 50% of the additive in the catalyst, and drying it. The drying temperature is usually controlled to 200 ℃ or lower. The organic additive is selected from compounds containing at least two oxygen atoms and 2-10 carbon atoms or ethers thereof, or compounds containing at least one covalent bond nitrogen atom and at least one carbonyl group.

U.S. Pat. No. 4, 6239054, 1 discloses a method for treating a deactivated catalyst with a ligand compound which comprises impregnating a commercially regenerated deactivated catalyst with diammonium Ethylenediaminetetraacetate (EDTA), followed by aging in a closed vessel at 60 ℃ for 4 days, and finally drying and calcining. During the roasting process, ammonia nitrogen compounds are released, which causes environmental pollution.

Chinese patent CN1921942A reports a method for recovering the activity of a spent hydroprocessing catalyst, comprising the steps of subjecting a spent hydroprocessing catalyst with carbon deposition to a carbon burning treatment to obtain an intermediate catalyst with the carbon content reduced to 0.5-2.5% of the total amount, contacting the intermediate catalyst with a chelating agent solution containing nitrogen and carrying out an aging treatment, wherein the aging treatment time exceeds 10 hours, and finally drying to obtain a regenerated catalyst, wherein more than 50% of the introduced chelating agent amount is retained in the dried catalyst. During the drying process of the catalyst, ammonia nitrogen compounds are released, and certain pollution is caused to the environment.

Through research, the regenerated catalyst is soaked in a solution containing an inorganic auxiliary agent and a solution containing an organic chelating ligand auxiliary agent, the soaked sample is dried at room temperature, and then the activated catalyst is obtained through drying and heat treatment.

Disclosure of Invention

The utility model aims to solve the technical problem that a heavy distillate oil hydrotreating catalyst system of reviving is provided, combines the activity recovery technology, can realize reviving to regenerated catalyst, improves regenerated catalyst's activity recovery efficiency.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a heavy distillate oil hydrotreating catalyst reactivation system, includes steeping vat and drying equipment, the steeping vat bottom is equipped with the leakage fluid dram, be equipped with the baffle in the steeping vat and separate the steeping vat into two cell bodys, be first cell body and second cell body respectively, be equipped with a filter screen section of thick bamboo in the first cell body, filter screen section of thick bamboo inner wall is equipped with helical blade, the pivot is connected through the link at the both ends of a filter screen section of thick bamboo, the pivot is passed through the actuating mechanism drive, first cell body both ends are equipped with charge door and the bin outlet with filter screen section of thick bamboo intercommunication, be equipped with the chain conveyor who carries the catalyst to the steeping vat outside in the second cell body, chain conveyor's output sets up the feed end top at the guipure conveyer, guipure conveyer's output setting is.

In the preferred scheme, a water return pipe is arranged at the bottom of the impregnation tank, a water pump is arranged on the water return pipe, a spray pipe is arranged on the outer side of the filter screen cylinder, and a spray head for spraying water to the filter screen cylinder is arranged on the spray pipe.

In the preferred scheme, an air outlet cover is arranged above the mesh belt conveyor and is connected with a blowing device through a pipeline.

In the preferred scheme, a water collecting tank is arranged below the mesh belt conveyor, and a water outlet is formed in the bottom of the water collecting tank.

In the preferred scheme, actuating mechanism includes driving motor, and driving motor's output is equipped with the action wheel, and the tip of pivot is equipped with from the driving wheel, and the action wheel passes through belt transmission with following the driving wheel.

The utility model provides a pair of heavy distillate oil hydrotreating catalyst system of reviving through setting up flooding groove, mesh belt conveyor and drying equipment, realizes flooding, drying, the drying process to regenerated catalyst, realizes the activity recovery to regenerated catalyst. Through setting up filter screen section of thick bamboo and helical blade, make things convenient for the transport of catalyst, help realizing continuous flooding, improve the reviving efficiency. The chain conveyor belt is arranged to realize the preliminary separation of the impregnation liquid and the catalyst, and then the draining treatment is realized through the mesh belt conveyor, so that the subsequent drying operation is facilitated.

Drawings

The invention will be further explained with reference to the following figures and examples:

fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the connection of the shower pipes;

in the figure: the device comprises a steeping vat 1, a drying device 2, a partition plate 3, a filter screen cylinder 4, a helical blade 5, a connecting frame 6, a rotating shaft 7, a chain type conveying belt 8, a mesh belt conveyor 9, a water return pipe 10, a water pump 11, a spray pipe 12, a spray head 13, an air outlet cover 14, a blower device 15, a water collecting tank 16, a driving motor 17, a driving wheel 18, a driven wheel 19, a liquid discharge port 101, a first trough body 102, a second trough body 103, a charging opening 104, a discharge opening 105 and a water discharge opening 1601.

Detailed Description

As shown in fig. 1, a heavy distillate hydrotreating catalyst rejuvenation system includes an impregnation tank 1 and a drying device 2, in this embodiment, the drying device 2 is a belt dryer, or may be replaced by other drying devices, a liquid discharge port 101 is disposed at the bottom of the impregnation tank 1, a partition plate 3 is disposed in the impregnation tank 1 to separate the impregnation tank 1 into two tank bodies, which are a first tank body 102 and a second tank body 103, respectively, a filter screen cylinder 4 is disposed in the first tank body 102, the filter screen cylinder 4 is horizontally disposed, two ends of the filter screen cylinder 4 are close to an inner wall of the first tank body 102, a distance is smaller than a particle size of a catalyst, a helical blade 5 is disposed on the inner wall of the filter screen cylinder 4, two ends of the filter screen cylinder 4 are connected with a rotating shaft 7 through a connecting frame 6, the rotating shaft 7 is rotatably mounted on a side wall of the first tank body 102 through a bearing, the rotating shaft, in this embodiment, the driving mechanism includes a driving motor 17, the driving motor 17 is fixed on a mounting plate outside the impregnation tank 1, an output end of the driving motor 17 is provided with a driving wheel 18, an end of the rotating shaft 7 is provided with a driven wheel 19, and the driving wheel 18 and the driven wheel 19 are in belt transmission. The two ends of the first tank body 102 are provided with a feed inlet 104 and a discharge outlet 105 which are communicated with the inner cavity of the filter screen cylinder 4, the second tank body 103 is internally provided with a chain type conveyer belt 8 which is used for conveying the catalyst to the outer side of the impregnation tank 1, the feed end of the chain type conveyer belt 8 is arranged below the discharge outlet 105, the output end of the chain type conveyer belt 8 is arranged above the feed end of the mesh belt conveyer 9, and the output end of the mesh belt conveyer 9 is arranged above the feed inlet of the drying equipment 2.

When the device is used specifically, the impregnation liquid is prepared and then added into the impregnation tank 1, the impregnation liquid is an aqueous solution containing phosphoric acid, tartaric acid and glycerol, the tartaric acid can be replaced by malic acid, the liquid level of the impregnation liquid is higher than the bottom of the filter screen cylinder 4, and in the embodiment, the liquid level is up to the position of a rotating shaft 7 of the filter screen cylinder 4; adding a regenerated catalyst into the filter screen cylinder 4 through the feed inlet 104, and mixing the regenerated catalyst with the impregnation liquid; starting a driving mechanism to drive the filter screen cylinder 4 to rotate, stirring the regenerated catalyst, meanwhile, conveying the regenerated catalyst to the direction of the discharge port 105 due to the spiral blade 5, and adjusting the conveying speed to ensure that the impregnation time of the regenerated catalyst is 20-30 min; discharging the impregnated regenerated catalyst from the discharge port 105 to the upper side of the chain conveyor belt 8, separating the regenerated catalyst from the impregnation liquid under the conveying of the chain conveyor belt 8, and performing primary draining; conveying the regenerated catalyst to a mesh belt conveyor 9 through a chain type conveying belt 8, and draining the regenerated catalyst in the conveying process; the drained regenerated catalyst is conveyed to a drying device 2 for drying.

Preferably, as shown in fig. 1 and 2, a water return pipe 10 is provided at the bottom of the dipping tank 1, a water pump 11 is provided on the water return pipe 10, a spray pipe 12 is provided outside the filter screen cylinder 4, and a spray head 13 for spraying water to the filter screen cylinder 4 is provided on the spray pipe 12.

The showers 12 may be provided as arcs distributed along the circumference of the screen cylinder 4.

By arranging the water return pipe 10 and the spray pipe 12, on one hand, the impregnation liquid in the impregnation tank 1 circularly flows and is uniformly distributed; on the other hand, the impregnation liquid is uniformly contacted with the regenerated catalyst, so that the catalytic activity is improved.

An air outlet cover 14 is arranged above the mesh belt conveyor 9, the air outlet cover 14 is connected with a rack of the mesh belt conveyor 9 through a support, and the air outlet cover 14 is connected with a blowing device 15 through a pipeline. The blower 15 is an air blower.

In the conveying process of the mesh belt conveyor 9 to the regenerated catalyst, the catalyst is air-dried through the air blowing device 15, the airing efficiency of the catalyst is improved, the water content is reduced, and the subsequent drying efficiency is favorably improved.

Preferably, a water collecting tank 16 is arranged below the mesh belt conveyor 9, and a water discharging port 1601 is arranged at the bottom of the water collecting tank 16.

The drained water is collected by the water collection tank 16, so that the ground is prevented from being polluted. The water outlet 1601 can be connected with the dipping tank 1 through a pipeline and a water pump, so that the leachate can be recycled.

Claims (5)

1. The utility model provides a heavy distillate oil hydrotreating catalyst system of reactivating, includes steeping vat (1) and drying equipment (2), and steeping vat (1) bottom is equipped with leakage fluid dram (101), its characterized in that: be equipped with baffle (3) in steeping vat (1) and separate steeping vat (1) into two cell bodies, be first cell body (102) and second cell body (103) respectively, be equipped with filter screen section of thick bamboo (4) in first cell body (102), filter screen section of thick bamboo (4) inner wall is equipped with helical blade (5), pivot (7) are connected through link (6) at the both ends of filter screen section of thick bamboo (4), actuating mechanism drive is passed through in pivot (7), first cell body (102) both ends are equipped with charge door (104) and bin outlet (105) with filter screen section of thick bamboo (4) intercommunication, be equipped with in second cell body (103) and carry catalyst to chain conveyor (8) in the steeping vat (1) outside, the output setting of chain conveyor (8) is in the feed end top of mesh belt conveyor (9), the output setting of mesh belt conveyor (9) is in the feed inlet top of drying equipment (2).

2. The heavy distillate hydrotreating catalyst rejuvenation system according to claim 1 characterized in that: the bottom of the dipping tank (1) is provided with a water return pipe (10), the water return pipe (10) is provided with a water pump (11), the outer side of the filter screen cylinder (4) is provided with a spray pipe (12), and the spray pipe (12) is provided with a spray head (13) for spraying water to the filter screen cylinder (4).

3. The heavy distillate hydrotreating catalyst rejuvenation system according to claim 1 characterized in that: an air outlet cover (14) is arranged above the mesh belt conveyor (9), and the air outlet cover (14) is connected with a blowing device (15) through a pipeline.

4. The heavy distillate hydrotreating catalyst rejuvenation system according to claim 1 characterized in that: a water collecting tank (16) is arranged below the mesh belt conveyor (9), and a water outlet (1601) is arranged at the bottom of the water collecting tank (16).

5. The heavy distillate hydrotreating catalyst rejuvenation system according to claim 1 characterized in that: the driving mechanism comprises a driving motor (17), a driving wheel (18) is arranged at the output end of the driving motor (17), a driven wheel (19) is arranged at the end part of the rotating shaft (7), and the driving wheel (18) and the driven wheel (19) are in belt transmission.

Images