CN214408826U

CN214408826U - Fixed fluidized bed reaction evaluation device

Info

Publication number: CN214408826U
Application number: CN202120376195.5U
Authority: CN
Inventors: 李荻; 郭江伟; 石宝珍; 常显鑫; 栾秋琴
Original assignee: Qingdao Jingrun Petrochemical Design & Research Institute Co ltd
Current assignee: Qingdao Jingrun Petrochemical Design & Research Institute Co ltd
Priority date: 2021-02-20
Filing date: 2021-02-20
Publication date: 2021-10-15
Anticipated expiration: 2031-02-20

Abstract

The utility model discloses a fixed fluidized bed reaction evaluation device contains charge-in system, reaction system and tail gas processing system triplex, mainly by rotor flow meter, advection pump (7), gear pump (14), preheater (17), first reactor (21), one-level water cooler (35), second grade liquid cooler (36), tertiary reflux condenser (40), press from both sides main equipment such as cover collecting tank (39), cryogenic cooling circulating pump (41), gas collection bucket (42), collecting tank (44) and relevant pressure temperature detection instrument, electronic scale, pipeline valve connecting piece etc. constitute. The utility model discloses a fixed fluidization reaction evaluation device's two reactors can realize the reaction mode such as round trip switch reaction, series reaction, improve the efficiency and the flexibility of catalyst evaluation.

Description

Fixed fluidized bed reaction evaluation device

Technical Field

The utility model relates to a quick evaluation device of catalytic cracking catalyst in petrochemical field.

Background

Catalytic cracking is an important means for the conversion of heavy oils to light oils. The development of catalytic cracking catalysts requires frequent evaluation of the performance of the catalyst to improve the performance of the catalyst. The catalyst is evaluated and screened on a laboratory riser device, so that the method has the advantages of high operation difficulty, high operation cost, low screening efficiency and large catalyst consumption, and is not suitable for the research and development of a laboratory catalytic cracking catalyst. The fixed fluidized bed reaction evaluation device has the advantages of simple operation, low operation cost, high evaluation efficiency, small catalyst consumption, compact equipment, small occupied area and small equipment investment, and is particularly suitable for the evaluation and screening requirements of a catalytic cracking catalyst research and development laboratory on the catalyst.

The patent documents disclosed at present are all fixed fluidized bed evaluation devices with only one reactor, only one catalyst can be evaluated in each experimental period, and the efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a fixed fluidized bed reaction evaluation device which can meet the evaluation and screening requirements of a catalytic cracking catalyst research and development laboratory on catalysts; when the device is provided with two reactors, the two reactors can be switched and connected in series, and the reaction evaluation efficiency is improved.

In order to achieve the aim, the utility model provides a fixed fluidized bed reaction evaluation device, which comprises a feeding system, a reaction system and a tail gas treatment system;

the feeding system is provided with an oxygen rotor flow meter, a nitrogen rotor flow meter, a water tank, a constant flow pump, an oil tank, a gear pump and a preheating furnace; the oxygen rotor flow meter and the nitrogen rotor flow meter are arranged in parallel and communicated with the preheating furnace, the water tank is communicated with the preheating furnace through a constant flow pump, and the oil tank is communicated with the preheating furnace through a gear pump; when in specific implementation, the system is also provided with related pressure and temperature detecting instruments, electronic scales, pipeline valve connecting pieces and other matched pipelines;

the reaction system is provided with a first reactor; the inlet of the first reactor is communicated with the preheating furnace of the feeding system;

the tail gas treatment system is provided with a primary water cooler, a secondary liquid cooler, a tertiary reflux condenser, a jacket liquid collecting bottle, a low-temperature cooling circulating pump, a gas collecting barrel, a water collecting barrel and a vacuum pump; the inlet of the primary water cooler is communicated with the outlet of the first reactor; the primary water cooler and the secondary liquid cooler are sequentially communicated and are communicated with the tertiary reflux condenser through a jacket liquid collecting bottle, a cooling medium inlet and a cooling medium outlet of the secondary liquid cooler are respectively communicated with the low-temperature cooling circulating pump, and two gas outlets of the tertiary reflux condenser are respectively communicated with the low-temperature cooling circulating pump and the gas collecting barrel; the water collecting barrel is arranged above the gas collecting barrel, and the bottom of the water collecting barrel is communicated with the bottom of the gas collecting barrel; the gas collection barrel is communicated with the vacuum pump, and an air bag is arranged on a connecting pipeline between the gas collection barrel and the vacuum pump; the gas outlet of the secondary liquid cooler and the gas outlet of the jacket liquid collecting bottle are communicated with the gas inlet of the flue gas water bottle; and the water tank, the oil tank and the water collecting barrel are respectively and correspondingly provided with a water tank electronic balance, an oil tank electronic balance and a water collecting barrel electronic balance.

According to the reaction evaluation device for the fixed fluidized bed, the reaction system is also provided with the second reactor, the second reactor is connected with the first reactor in parallel or in series, and the series reaction and the back-and-forth switching individual reaction of the first reactor and the second reactor can be realized through the operation of the relevant valves. The utility model discloses a fixed fluidization reaction evaluation device's two reactors can realize the reaction mode such as round trip switch reaction, series reaction, improve the efficiency and the flexibility of catalyst evaluation.

According to the reaction evaluation device for the fixed fluidized bed, the first furnace tube and the second furnace tube are arranged in the preheating furnace, the first furnace tube and the second furnace tube are mutually embedded and inserted into a furnace chamber of the preheating furnace, the water tank 5 is communicated with the inlet of the first furnace tube through the constant flow pump, the oil tank is communicated with the inlet of the second furnace tube through the gear pump, and the outlet of the first furnace tube is communicated with the inlet of the second furnace tube. The water is heated into steam by the first furnace tube and then mixed with the raw oil in the oil tank, and then enters the second furnace tube, and the steam is heated by the second furnace tube and then enters the nozzle at the bottom of the reactor, so that the fluidized bed reaction is realized.

Advantageous effects

The utility model is provided with a feeding system, a reaction system and a tail gas treatment system, which can simulate the catalytic cracking of oil products in a fixed fluidized bed under different catalyst conditions, and can meet the requirements of catalyst research and development laboratories on the evaluation and screening of catalysts; when the device is provided with two reactors, the two reactors can realize reaction modes such as back-and-forth switching reaction, series reaction and the like, the efficiency and the flexibility of catalyst evaluation are improved, when the two reactors are switched for use, the cooling time after the reaction of one reactor is finished can be effectively utilized, the catalyst evaluation efficiency is improved, and when the two reactors are used in series, the simulation evaluation of the same type or two catalyst relay reaction modes can be realized. Two furnace tubes are arranged in the preheating furnace, so that the generation of water vapor and the preheating of raw oil are realized simultaneously, and the investment is saved. The simplified process saves the investment and reduces the maintenance cost of the device.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the fixed fluidized bed reaction evaluation device of the present invention.

Fig. 2 is a schematic structural diagram of the second embodiment of the fixed fluidized bed reaction evaluation device of the present invention.

In the drawings: 1-oxygen-way through ball valve, 2-nitrogen-way through ball valve, 3-oxygen rotameter, 4-nitrogen rotameter, 5-water tank, 6-water tank electronic balance, 7-advection pump, 8-advection pump outlet three-way valve, 9-advection pump outlet one-way valve, 10-gas-way one-way valve, 11-oil tank, 12-oil tank electronic balance, 13-oil tank outlet ball valve, 14-gear pump, 15-gear pump outlet three-way ball valve, 16-gear pump outlet one-way valve, 17-preheating furnace, 18-inlet needle valve a, 19-inlet needle valve b, 20-second reactor, 21-first reactor, 22-second reactor loading and unloading ball valve, 23-first reactor loading and unloading ball valve, 24-second reactor pressure gauge, 25-a second reactor upper internal thermal couple, 26-a second reactor bed thermal couple, 27-a first reactor upper internal thermal couple, 28-a first reactor bed thermal couple, 29-a first reactor pressure gauge, 30-an outlet needle valve a, 31-an outlet needle valve b, 32-an outlet needle valve c, 33-an outlet needle valve d, 34-a three-way ball valve a, 35-a first-stage water cooler, 36-a second-stage liquid cooler, 37-a three-way ball valve b, 38-an internal thermal couple of a liquid collecting bottle, 39-a jacket liquid collecting bottle, 40-a three-stage reflux condenser, 41-a low-temperature cooling circulating pump, 42-a gas collecting barrel, 43-a water collecting barrel electronic balance, 44-a water collecting barrel, 45-a flue gas water bottle, 46-a three-way ball valve c, 47-a three-way ball valve d, and 48-an air bag, 49-vacuum pump, 50-three-way ball valve e.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The drawings and detailed description do not limit the scope of the invention as claimed.

The first implementation mode comprises the following steps:

fig. 1 shows a fixed fluidized bed reaction evaluation device according to the present invention, which comprises a feeding system, a reaction system and a tail gas treatment system;

the feeding system is provided with an oxygen rotor flow meter 3, a nitrogen rotor flow meter 4, a water tank 5, a constant flow pump 7, an oil tank 11, a gear pump 14 and a preheating furnace 17; the oxygen rotor flow meter 3 and the nitrogen rotor flow meter 4 are arranged in parallel, the oxygen rotor flow meter 3 is communicated with an oxygen source through an oxygen path through ball valve 1, the nitrogen rotor flow meter 4 is communicated with the nitrogen source through a nitrogen path through ball valve 2, and the oxygen rotor flow meter 3 and the nitrogen rotor flow meter 4 are both communicated with a preheating furnace 17 through a gas path one-way valve 10;

the water tank 5 is communicated with a preheating furnace 17 through a constant flow pump 7, a constant flow pump outlet three-way valve 8 and a constant flow pump outlet one-way valve 9 are sequentially arranged at the outlet of the constant flow pump 7, and a water tank electronic balance 6 is correspondingly arranged on the water tank 5; the oil tank 11 is communicated with a preheating furnace 17 through a gear pump 14, the oil tank 11 is correspondingly provided with an oil tank electronic balance 12, an oil tank outlet ball valve 13 is arranged at the outlet of the oil tank 11, and a gear pump outlet three-way ball valve 15 and a gear pump outlet one-way valve 16 are sequentially arranged at the outlet of the gear pump 14;

the preheating furnace 17 is a single-furnace cavity tubular furnace, the furnace cavity is cylindrical, a first furnace tube and a second furnace tube are arranged in the preheating furnace 17, the first furnace tube and the second furnace tube are mutually inserted and arranged in the furnace cavity, the water tank 5 is communicated with the inlet of the first furnace tube through the advection pump 7, the oil tank 11 is communicated with the inlet of the second furnace tube through the gear pump 14, the outlet of the first furnace tube is communicated with the inlet of the second furnace tube, when the device is used, water is heated into steam through the first furnace tube and then mixed with raw oil in the oil tank, the mixture enters the second furnace tube, and the mixture enters a bottom nozzle of the reactor after being heated by the second furnace tube, so that fluidized bed reaction is realized;

the reaction system is provided with a first reactor 21, and the inlet of the first reactor 21 is communicated with the hot oil outlet of the preheating furnace 17 through an inlet needle valve b 19; the first reactor 21 is provided with a first reactor upper inner thermal couple 27, a first reactor bed thermal couple 28 and a first reactor pressure gauge 29 which are respectively used for measuring and controlling the temperature and pressure of the corresponding part in the first reactor 21 in the fluidized bed reaction process; the tail gas treatment system is provided with a primary water cooler 35, a secondary liquid cooler 36, a tertiary reflux condenser 40, a jacket liquid collecting bottle 39, a low-temperature cooling circulating pump 41, a gas collecting barrel 42, a water collecting barrel 44 and a vacuum pump 49; the inlet of the primary water cooler 35 is communicated with the outlet of the first reactor 21 through a three-way ball valve a34, and the three-way ball valve a34 is communicated with a vacuum pipeline; the primary water cooler 35 and the secondary liquid cooler 36 are sequentially communicated and are communicated with a tertiary reflux condenser 40 through a jacket liquid collecting bottle 39, a cooling medium inlet and a cooling medium outlet of the secondary liquid cooler 36 are respectively communicated with a low-temperature cooling circulating pump 41, and two gas outlets of the tertiary reflux condenser 40 are respectively communicated with the low-temperature cooling circulating pump 41 and a gas collecting barrel 42; the water collecting barrel 44 is arranged above the gas collecting barrel 42, the bottom of the water collecting barrel 44 is communicated with the bottom of the gas collecting barrel 42, and the water collecting barrel 44 is correspondingly provided with a water collecting barrel electronic balance 43; the gas collecting barrel 42 is communicated with a vacuum pump 49, and a gas bag 48 is arranged on a connecting pipeline of the gas collecting barrel 42 and the vacuum pump 49; the gas outlet of the secondary liquid cooler 36 and the gas outlet of the jacket liquid collecting bottle 39 are communicated with the gas inlet of a flue gas water bottle 45; a three-way ball valve b37 is arranged on a connecting pipeline between the secondary liquid cooler 36, the jacket liquid collecting bottle 39 and the flue gas water bottle 45, a three-way ball valve c46 and a three-way ball valve d47 are arranged on a connecting pipeline between the gas outlet of the tertiary reflux condenser 40, the gas collecting barrel 42 and the flue gas water bottle 45, the three-way ball valve d47 is communicated with a tail gas pipeline, and a three-way ball valve e50 is arranged on a connecting pipeline between the gas collecting barrel 42, the vacuum pump 49 and the air bag 48.

The specific process of the fixed fluidized bed reaction evaluation device for carrying out the catalyst fixed fluidized bed reaction evaluation is as follows: and opening an inlet needle valve b19, wherein the device is in a single-reactor form, opening a low-temperature cooling circulating pump 41 to set the temperature of the cooling liquid, adjusting a three-way ball valve b37 to communicate the secondary liquid cooler 36 with the flue gas water bottle 45, and adjusting a three-way ball valve d47 to communicate the flue gas water bottle 45 with the tail gas pipeline. Vacuumizing the first reactor 21 through a three-way ball valve a34, adding a catalyst into the first reactor 21 through a first reactor loading and unloading ball valve 23, closing a three-way ball valve b37 in the vacuumizing process, immediately adjusting a three-way ball valve b37 to communicate the secondary liquid cooler 36 with a flue gas water bottle 45 after loading the catalyst, then entering a heating process, opening a nitrogen path straight ball valve 2, adjusting a nitrogen rotameter 4 to a set flow rate, setting the temperature of the preheating furnace 17 and the first reactor 21 to start heating, opening a constant flow pump 7 when the temperature of the preheating furnace 17 rises to a target temperature, setting a water inlet rate, closing the nitrogen path straight ball valve 2 after 30min, and stopping nitrogen inlet. After the oil inlet amount of the gear pump 14 is calibrated, the three-way ball valve 15 at the outlet of the gear pump is adjusted to enable the oil to return to the oil tank 11 to form circulation. After the catalyst bed layer of the first reactor 21 reaches the reaction temperature and is stabilized for 10min, adjusting a three-way ball valve b37 to be communicated with a secondary liquid cooler 36 and a jacket liquid collecting bottle 39, adjusting a three-way ball valve c46 to be communicated with the jacket liquid collecting bottle 39 and a gas collecting barrel 42, then adjusting a gear pump outlet three-way ball valve 15 to start oil feeding, condensing gasoline, diesel oil and heavier components into liquid to enter the jacket liquid collecting bottle 39 after oil gas generated by the reaction passes through a primary water cooler 35 and the secondary liquid cooler 36, feeding the non-condensable gas products into the gas collecting barrel 42 filled with water, discharging the water from a drain pipe at the bottom of the gas collecting barrel 42 to enter an upper water collecting barrel 44, adjusting the three-way ball valve 15 to enable the oil to circularly enter a tank 11 when the oil is fed for 1min, and obtaining the oil feeding quality within 1min through an oil tank electronic balance 12. And after the oil feeding is stopped, the process of stripping is started, after the stripping process is finished, the three-way ball valve b37 is adjusted to be communicated with the secondary liquid cooler 36 and the flue gas water bottle 45, the three-way ball valve d47 is adjusted to be communicated with the flue gas water bottle 45 and the tail gas pipeline, the quality of drainage is recorded after the reading of the electronic balance 43 of the water collecting barrel is stable, and meanwhile, the height difference of liquid levels in the air collecting barrel 42 and the water collecting barrel 44 is recorded. The first reactor 21 is set to the temperature required for regeneration in preparation for warming to enter the regeneration process. In the temperature rise process, a gas sample is collected into the gas bag 48 through the three-way ball valve d47 in cooperation with the vacuum pump 49 for chromatographic analysis, and the liquid in the jacket liquid collecting bottle 39 is taken out for oil-water separation and related analysis. After the temperature of the catalyst bed in the first reactor 21 rises to the regeneration temperature and is stable, and the liquid in the water collecting barrel 44 completely flows back to the gas collecting barrel 42 under the action of gravity, the three-way ball valve d47 and the three-way ball valve c46 are adjusted to be communicated with the flue gas water bottle 45 and the gas collecting barrel 42, the oxygen path straight ball valve 1 is opened, the oxygen flow is adjusted to be the set flow through the oxygen rotameter 3, then the advection pump 7 is closed to stop water inflow, the regeneration and burning process is carried out, the three-way ball valve 47 is adjusted to be communicated with the flue gas water bottle 45 and the tail gas pipeline after 15min, the burning process is finished, the quality of drainage is recorded after the reading of the water collecting barrel electronic balance 43 is stable, and the liquid level difference in the gas collecting barrel 42 and the water collecting barrel 44 is recorded at the same time. The regenerated flue gas is collected to the air bag 48 through the three-way ball valve d47 in cooperation with the vacuum pump 49, and the content of carbon dioxide and carbon monoxide in the regenerated flue gas is obtained through analysis. After the burning process is finished, the oxygen path straight-through ball valve 1 is closed to stop oxygen feeding, the temperature of the first reactor 21 is set to the reaction temperature, and the temperature is reduced to prepare for the next experiment period. During the temperature reduction process, the catalyst can be replaced by the loading and unloading agent ball valve 23 of the first reactor to evaluate different catalysts, or the evaluation can be continued without replacing the catalyst or the experiment can be finished after unloading the agent.

The second embodiment:

fig. 2 shows another fixed fluidized bed reaction evaluation apparatus according to the present invention, which comprises a feeding system, a reaction system and a tail gas treatment system;

the reaction system is also provided with a second reactor 20, the second reactor 20 is arranged in series with the first reactor 21, namely the device is in a double-reactor form, an outlet needle valve a30, an outlet needle valve b31, an outlet needle valve c32 and an outlet needle valve d33 are arranged on a connecting pipeline between the outlet of the first reactor 21 and the outlet of the second reactor 20, and the inlet of the second reactor 20 is communicated with a hot oil outlet of the preheating furnace 17 through the inlet needle valve a 18; the second reactor (20) is provided with a second reactor upper inner temperature thermocouple 25, a second reactor bed thermocouple 26 and a second reactor pressure gauge 24 which are respectively used for measuring and controlling the temperature and the pressure of the corresponding part in the second reactor 20 in the fluidized bed reaction process;

other parts of the device structure of this embodiment are the same as those of the first embodiment.

The specific flow for performing the reaction evaluation of the catalyst-immobilized fluidized bed by using the apparatus for evaluating the reaction of the immobilized fluidized bed of the present embodiment is as follows:

opening an inlet needle valve b19, an outlet needle valve b31 and an outlet needle valve c32, closing the inlet needle valve a18, the outlet needle valve a30 and an outlet needle valve d33, forming a double-reactor series connection mode, opening a low-temperature cooling circulating pump 41 to set the temperature of cooling liquid, adjusting a three-way ball valve b37 to communicate a secondary liquid cooler 36 and a flue gas water bottle 45, and adjusting a three-way ball valve d47 to communicate the flue gas water bottle 45 and a tail gas pipeline. The first reactor 21 is evacuated by the three-way ball valve a34, and the agent is added to the first reactor 21 through the first reactor loading and unloading agent ball valve 23. The second reactor 20 is evacuated through the three-way ball valve a34 and dosed to the second reactor 20 through the second reactor loading/unloading agent ball valve 22. The first reactor 21 and the second reactor 20 can use the same or different catalysts, the three-way ball valve b37 is closed in the vacuumizing process, the three-way ball valve b37 is immediately adjusted after the filling of the catalyst is finished to communicate the secondary liquid cooler 36 with the flue gas water bottle 45, then the temperature rise process is carried out, the nitrogen path straight-through ball valve 2 is opened, the nitrogen gas rotameter 4 is adjusted to the set flow rate, the temperature of the preheating furnace 17 and the first reactor 21 is set to start temperature rise, when the temperature of the preheating furnace 17 rises to the target temperature, the advection pump 7 is opened, the water inlet rate is set, the nitrogen path straight-through ball valve 2 is closed after 30min, and the nitrogen gas inlet is stopped. After the oil inlet amount of the gear pump 14 is calibrated, the three-way ball valve 15 at the outlet of the gear pump is adjusted to enable the oil to return to the oil tank 11 to form circulation. After the catalyst bed layer of the first reactor 21 reaches the reaction temperature and is stabilized for 10min, adjusting a three-way ball valve b37 to be communicated with a secondary liquid cooler 36 and a jacket liquid collecting bottle 39, adjusting a three-way ball valve c46 to be communicated with the jacket liquid collecting bottle 39 and a gas collecting barrel 42, then adjusting a gear pump outlet three-way ball valve 15 to start oil feeding, condensing gasoline, diesel oil and heavier components into liquid to enter the jacket liquid collecting bottle 39 after oil gas generated by the reaction passes through a primary water cooler 35 and the secondary liquid cooler 36, feeding the non-condensable gas products into the gas collecting barrel 42 filled with water, discharging the water from a drain pipe at the bottom of the gas collecting barrel 42 to enter a water collecting barrel 44 above, adjusting the gear pump outlet three-way ball valve 15 to enable the oil to circularly enter the tank 11 when 1min of oil feeding is carried out, and obtaining the oil feeding quality within 1min through an oil tank electronic balance 12. And after the oil feeding is stopped, the process of stripping is started, after the stripping process is finished, the three-way ball valve b37 is adjusted to be communicated with the secondary liquid cooler 36 and the flue gas water bottle 45, the three-way ball valve d47 is adjusted to be communicated with the flue gas water bottle 45 and the tail gas pipeline, the quality of drainage is recorded after the reading of the electronic balance 43 of the water collecting barrel is stable, and meanwhile, the height difference of liquid levels in the gas collecting barrel 42 and the water collecting barrel 44 is recorded. The first reactor 21 is set to the temperature required for regeneration in preparation for warming to enter the regeneration process. In the temperature rise process, a gas sample is collected into the gas bag 48 through the three-way ball valve d47 in cooperation with the vacuum pump 49 for chromatographic analysis, and liquid in the jacket liquid collecting bottle 39 is taken out for oil-water separation and related analysis. After the temperature of the catalyst bed in the first reactor 21 rises to the regeneration temperature and is stable, and the liquid in the water collecting barrel 44 completely flows back to the gas collecting barrel 42 under the action of gravity, the three-way ball valve d47 and the three-way ball valve c46 are adjusted to be communicated with the flue gas water bottle 45 and the gas collecting barrel 42, the oxygen path straight-way ball valve 1 is opened to adjust the oxygen flow through the oxygen rotameter 3, then the advection pump 7 is closed to stop water inflow, the regeneration and burning process is carried out, the three-way ball valve d47 is adjusted to be communicated with the flue gas water bottle 45 and the tail gas pipeline after 15min, the burning process is finished, the quality of drainage is recorded after the reading of the electronic balance 43 of the water collecting barrel is stable, and the height difference of the liquid level in the gas collecting barrel 42 and the water collecting barrel 44 is recorded at the same time. The regenerated flue gas is collected to an air bag 48 through a three-way ball valve d47 in cooperation with a vacuum pump 49, and the content of carbon dioxide and carbon monoxide in the regenerated flue gas is obtained through analysis. After the burning process is finished, the oxygen path straight-through ball valve 1 is closed to stop oxygen feeding, the temperature of the first reactor 21 is set to the reaction temperature, and the temperature is reduced to prepare for the next experiment period. During the temperature reduction process, the catalyst can be replaced by the loading and unloading agent ball valve 23 of the first reactor to evaluate different catalysts, or the evaluation can be continued without replacing the catalyst or the experiment can be finished after unloading the agent.

The third embodiment is as follows:

as shown in fig. 2, the fixed fluidized bed reaction evaluating apparatus adjusts the opening and closing of the outlet needle valve a30, the outlet needle valve b31, the outlet needle valve c32 and the outlet needle valve d33 on the connecting line between the outlet of the first reactor 21 and the outlet of the second reactor 20, the outlet of the first reactor 21 and the second reactor 20 can be set to be in a parallel switching mode, when in use, before the experiment, the same or different catalysts are loaded into the first reactor 21 and the second reactor 20, the second reactor 20 is set to a proper temperature, after the coking process of the first reactor 21 is finished, the inlet needle valve b19 and the outlet needle valve d33 are closed, the inlet needle valve a18 and the outlet needle valve c32 are opened, and the next group of experiments are carried out by using the second reactor 20.

Claims

1. A fixed fluidized bed reaction evaluation device is characterized by comprising a feeding system, a reaction system and a tail gas treatment system;

the feeding system is provided with an oxygen rotor flow meter (3), a nitrogen rotor flow meter (4), a water tank (5), a constant flow pump (7), an oil tank (11), a gear pump (14) and a preheating furnace (17); the oxygen rotor flow meter (3) and the nitrogen rotor flow meter (4) are arranged in parallel and are communicated with the preheating furnace (17), the water tank (5) is communicated with the preheating furnace (17) through the constant flow pump (7), and the oil tank (11) is communicated with the preheating furnace (17) through the gear pump (14);

the reaction system is provided with a first reactor (21); the inlet of the first reactor (21) is communicated with a preheating furnace (17) of the feeding system; the tail gas treatment system is provided with a primary water cooler (35), a secondary liquid cooler (36), a tertiary reflux condenser (40), a jacket liquid collecting bottle (39), a low-temperature cooling circulating pump (41), a gas collecting barrel (42), a water collecting barrel (44) and a vacuum pump (49); the inlet of the primary water cooler (35) is communicated with the outlet of the first reactor (21); the primary water cooler (35) and the secondary liquid cooler (36) are sequentially communicated and are communicated with the tertiary reflux condenser (40) through a jacket liquid collecting bottle (39), a cooling medium inlet and a cooling medium outlet of the secondary liquid cooler (36) are respectively communicated with a low-temperature cooling circulating pump (41), and two gas outlets of the tertiary reflux condenser (40) are respectively communicated with the low-temperature cooling circulating pump (41) and a gas collecting barrel (42); the water collecting barrel (44) is arranged above the gas collecting barrel (42), and the bottom of the water collecting barrel (44) is communicated with the bottom of the gas collecting barrel (42); the gas collecting barrel (42) is communicated with a vacuum pump (49), and a gas bag (48) is arranged on a connecting pipeline of the gas collecting barrel (42) and the vacuum pump (49); the gas outlet of the secondary liquid cooler (36) and the gas outlet of the jacket liquid collecting bottle (39) are communicated with the gas inlet of a flue gas water bottle (45); the water tank (5), the oil tank (11) and the water collecting barrel (44) are respectively and correspondingly provided with a water tank electronic balance (6), an oil tank electronic balance (12) and a water collecting barrel electronic balance (43).

2. The stationary fluidized bed reaction evaluation device according to claim 1, wherein the reaction system is further provided with a second reactor (20), the second reactor (20) being connected in parallel with the first reactor (21).

3. The fixed fluidized bed reaction evaluation device according to claim 1, wherein a first furnace tube and a second furnace tube are arranged in the preheating furnace (17), the first furnace tube and the second furnace tube are inserted into a furnace chamber of the preheating furnace (17), the water tank (5) is communicated with an inlet of the first furnace tube through a constant flow pump (7), the oil tank (11) is communicated with an inlet of the second furnace tube through a gear pump (14), and an outlet of the first furnace tube is communicated with an inlet of the second furnace tube.

4. The stationary fluidized bed reaction evaluation device according to claim 1, wherein the reaction system is further provided with a second reactor (20), the second reactor (20) being connected in series with the first reactor (21).