CN212126237U

CN212126237U - Uninterrupted catalyst feeding equipment

Info

Publication number: CN212126237U
Application number: CN202020005058.6U
Authority: CN
Inventors: 张仑; 策红宝; 范渊
Original assignee: Luoyang Gongming Petrochemical Equipment Co ltd
Current assignee: Luoyang Gongming Petrochemical Equipment Co ltd
Priority date: 2020-01-03
Filing date: 2020-01-03
Publication date: 2020-12-11
Anticipated expiration: 2030-01-03

Abstract

The utility model belongs to the technical field of petrochemical catalyst proportioning equipment, a incessant catalyst feeding equipment is proposed. An uninterrupted catalyst loading apparatus is provided having a material storage tank; a diaphragm which divides the inner cavity of the material storage tank into an upper feeding cavity and a lower discharging cavity is arranged in the material storage tank; the top of the material storage tank is provided with a vent valve I communicated with the upper feeding cavity and a vent valve II communicated with the lower discharging cavity; the pressure in the lower discharging cavity and the upper feeding cavity is the same; the upper feeding cavity corresponding to the material storage tank is provided with a pneumatic powder conveying pump; the top of the material storage tank is also provided with an air inlet valve for uninterruptedly feeding the material in the upper feeding cavity into the lower discharging cavity; the air inlet valve, the emptying valve I and the emptying valve II are communicated with the control cabinet; the bottom of the lower discharging cavity is communicated with a screw conveyer; the utility model provides high reaction work efficiency, reduced intensity of labour, guaranteed the normal steady operation of oil refining main processing system.

Description

Uninterrupted catalyst feeding equipment

Technical Field

The utility model belongs to the technical field of petrochemical catalyst proportioning equipment, mainly relate to a incessant catalyst feeding apparatus.

Background

In the well-known petrochemical industry, raw oil enters a reactor for cracking reaction after being heated and gasified, and a catalyst is required to be added to promote the reaction speed and the reaction stability during the reaction of the raw oil; the mixture of the raw oil and the catalyst is stripped by superheated steam in a stripping section, and then separated by a cyclone separator, a reaction product enters a distillation system from a reaction system, and a catalyst precipitate is precipitated to a regenerator; fluidizing the catalyst in the regenerator by air, removing coke on the surface of the catalyst, recovering the catalyst again and recycling the catalyst in the device; automatic small catalyst feeding equipment is usually used for adding the catalyst in the reaction; the conventional small catalyst feeder can discontinuously convey the catalyst from a catalyst storage tank to a reactor by using compressed air, and the catalyst is mixed with the raw oil to perform catalytic reaction; the prior catalytic feeder equipment can only realize an intermittent pulse type conveying method and cannot realize continuous and uninterrupted conveying.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing an incessant catalyst feeding equipment.

The utility model discloses a realize above-mentioned purpose and adopt following technical scheme:

an uninterrupted catalyst feeding device having a material storage tank; a diaphragm which divides the inner cavity of the material storage tank into an upper feeding cavity and a lower discharging cavity is arranged in the material storage tank; the diaphragm is formed by butt joint of two pieces; the two corresponding diaphragm sheets are provided with electromagnetic valves for separating or combining the diaphragm sheets into a whole; the top of the material storage tank is provided with a vent valve I communicated with the upper feeding cavity and a vent valve II communicated with the lower discharging cavity; the emptying valve I and the emptying valve II are both normally open valves; the pressure in the lower discharging cavity and the pressure in the upper feeding cavity of the material storage tank are the same; the upper feeding cavity corresponding to the material storage tank is provided with a pneumatic powder conveying pump; the top of the material storage tank is also provided with an air inlet valve for uninterruptedly feeding the material in the upper feeding cavity into the lower discharging cavity; the air inlet valve, the emptying valve I and the emptying valve II are communicated with the control cabinet; the bottom of the lower discharging cavity of the material storage tank is communicated with a screw conveyor.

The upper feeding cavity and the lower discharging cavity corresponding to the material storage tank are respectively provided with a material level meter.

The utility model provides a pair of incessant catalyst feeding equipment, adopt the structural design of material storage tank among the above-mentioned technical scheme, under the effect of gravity and admission valve, the incessant lower discharging cavity that gets into of material in the messenger feeding cavity, through lower discharging cavity, screw conveyer carries out the supply of material, and the accessible realizes the incessant supply of adjusting the feeding volume along with the change of the raw oil volume in the reactor to screw conveyer's control feeding volume, reaction work efficiency has been improved, labor intensity is reduced, the normal steady operation of main process systems of refining has been guaranteed.

Drawings

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

In the figure: 1. the device comprises a charge level indicator, 2, a pneumatic powder conveying pump, 3, a screw conveyor, 4, a material storage tank, 4-1, an upper feeding cavity, 4-2, a lower discharging cavity, 4-3, a diaphragm, 5, a control cabinet, 6, an electromagnetic valve, 7, a vent valve I, 8, a vent valve II, 9 and an air inlet valve.

Detailed Description

The invention is described in connection with the accompanying drawings and the embodiments:

as shown in fig. 1, an uninterrupted catalyst feeding apparatus having a material storage tank 4; a diaphragm 4-3 which divides the inner cavity of the material storage tank into an upper feeding cavity 4-1 and a lower discharging cavity 4-2 is arranged in the material storage tank 4; the diaphragm 4-3 is formed by butt joint of two pieces; the two corresponding diaphragm pieces 4-3 are provided with electromagnetic valves 6 for separating or combining the diaphragm pieces into a whole; the pneumatic powder conveying pump 2 can be used for conveying dry powder solids, elastic diaphragms are arranged in two symmetrical working cavities of the powder conveying pump, namely, the two diaphragms are integrated by the diaphragm 4-3 through a connecting rod, two electromagnetic valves are arranged at an air source inlet and an air source outlet, and after air is pressurized and fed into an intermediate, the diaphragm is pushed to drive the connecting rod to move, so that a blocking site caused by agglomeration in the traditional direct pneumatic conveying is avoided, and the operation is more reliable; the top of the material storage tank 4 is provided with an emptying valve I7 communicated with the upper feeding cavity and an emptying valve II 8 communicated with the lower discharging cavity; the emptying valve I7 and the emptying valve II 8 are both normally open valves; the pressure in the lower discharging cavity 4-2 and the upper charging cavity 4-1 of the material storage tank is the same; a pneumatic powder conveying pump 2 is arranged corresponding to the upper feeding cavity 4-1 of the material storage tank; the pneumatic powder conveying pump is used for conveying powder materials and is used for conveying the catalyst to the material storage tank 4; the top of the material storage tank 4 is also provided with an air inlet valve 9 for uninterruptedly feeding the material in the upper feeding cavity 8 into the lower discharging cavity; the air inlet valve 9, the emptying valve I7 and the emptying valve II 8 are communicated with the control cabinet 5; the control cabinet 5 is a control cabinet which is commonly used in the prior art, and not described in detail, in the embodiment, a crude oil feeding amount signal is introduced into the control cabinet, and the control cabinet calculates and analyzes the catalyst required in the actual reactor; the control cabinet can receive and send 4-20mA signals, and adopts software to compile man-machine exchange pictures including login, data and new process flow chart display, data query and alarm display pages; the bottom of the lower discharging cavity of the material storage tank is communicated with a screw conveyor 3; the spiral conveyor is a conveying machine for conveying the catalyst, and the injection amount of the catalyst can be changed through frequency conversion adjustment, so that the catalyst is continuously conveyed to the reactor; the upper feeding cavity and the lower discharging cavity of the material storage tank are respectively provided with a material level meter 1; the charge level indicator can calculate the total amount and the allowance of the catalyst through the charge level difference and can receive and send a 4-20mA signal.

The utility model discloses incessant continuous catalyst feeding equipment is extravagant to the catalyst quantity at the refinery, and the inefficiency of schizolysis reaction technology and the professional equipment who designs adopt one set of catalyst feeding equipment that has incessant continuous transport capacity to replace in the past to be interrupted the operation, reinforced too fast catalyst feeding equipment, collect incessant continuous feeding, analysis and automatically regulated feeding volume, function in an organic whole such as operation stability. The hump feeding pulse diagram of the prior catalyst is presented as an approximately smooth straight line pulse by continuously feeding the catalyst for 24 hours at an even rate.

The screw conveyor 3 is applied to concrete mixing plants (buildings), asphalt mixing plants and dry powder mortar production lines for conveying cement, fly ash, mineral powder, dry sand and the like, and is also widely applied to industries such as chemical industry, building materials, grain, metallurgy, electric power and the like for conveying powdery and small granular materials. The motor frequency can be changed by receiving signals of the control cabinet, and the conveying capacity is controlled.

The control cabinet 5 adopts an explosion-proof type, can control the upper and lower layers of the material storage tank to pour materials, and displays material level and alarm of high and low liquid levels on the panel. The method comprises the following steps of controlling on-cabinet touch screen key mode parameter input or DCS remote parameter setting, and performing power failure protection on parameters; analog input current signal range: 4-20 mA. Adopt 485 Modbus RTU to connect, set for the volume of feeding and show the frame: the set value of the feeding amount of the screw conveyer is displayed during operation, the unit is kg/h, and the feeding amount is converted according to the feeding amount at the inlet and the PMM value of the raw oil.

Claims

1. An uninterrupted catalyst loading apparatus, characterized by: the catalyst feeding device is provided with a material storage tank; a diaphragm which divides the inner cavity of the material storage tank into an upper feeding cavity and a lower discharging cavity is arranged in the material storage tank; the diaphragm is formed by butt joint of two pieces; the two corresponding diaphragm sheets are provided with electromagnetic valves for separating or combining the diaphragm sheets into a whole; the top of the material storage tank is provided with a vent valve I communicated with the upper feeding cavity and a vent valve II communicated with the lower discharging cavity; the emptying valve I and the emptying valve II are both normally open valves; the pressure in the lower discharging cavity and the pressure in the upper feeding cavity of the material storage tank are the same; the upper feeding cavity corresponding to the material storage tank is provided with a pneumatic powder conveying pump; the top of the material storage tank is also provided with an air inlet valve for uninterruptedly feeding the material in the upper feeding cavity into the lower discharging cavity; the air inlet valve, the emptying valve I and the emptying valve II are communicated with the control cabinet; the bottom of the lower discharging cavity of the material storage tank is communicated with a screw conveyor.

2. An uninterrupted catalyst loading apparatus as claimed in claim 1, wherein: the upper feeding cavity and the lower discharging cavity corresponding to the material storage tank are respectively provided with a material level meter.