CN109433277A - A kind of catalyst reduction device operated continuously - Google Patents
A kind of catalyst reduction device operated continuously Download PDFInfo
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- CN109433277A CN109433277A CN201811411967.3A CN201811411967A CN109433277A CN 109433277 A CN109433277 A CN 109433277A CN 201811411967 A CN201811411967 A CN 201811411967A CN 109433277 A CN109433277 A CN 109433277A
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- catalyst
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- control system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/16—Reducing
- B01J37/18—Reducing with gases containing free hydrogen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/42—Platinum
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- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
Abstract
The invention discloses the catalyst reduction devices that one kind can operate continuously, the device is made of catalyst mobile control system and air-path control system, wherein catalyst mobile control system connects all parts by pipeline, is made of from top to bottom loading hopper, reduction furnace, cooling tank and storage tank；Air-path control system by by heating furnace, condenser, air blower, cooler and blower unit at, it wherein goes back Primordial Qi and is again introduced into reduction furnace as reduction followed by outlet after heating furnace, reduction furnace, condenser, air blower to be formed into a loop in reduction furnace, cooling air is formed into a loop in cooling tank by cooler and air blower.Apparatus of the present invention reducing catalyst can make catalyst be moved to cooling tank from reduction furnace, after dropping to room temperature, it removes and completes reduction, the temperature fall time after catalyst reduction can effectively be shortened, avoid the repetitive operation of handling catalyst, catalyst reduction efficiency is improved, realize catalyst reduction can continuity and high efficiency.
Description
Technical field
The present invention relates to catalyst reduction equipments, and in particular to the catalyst reduction device that one kind can operate continuously.
Background technique
Metallic catalyst is widely used in the fields such as current petrochemical industry.Such as naphtha reforming Pt catalyst, third
Alkane dehydrogenation Pt catalyst, vehicle exhaust Pt-Pd catalyst, oil hydrogenation Ni catalyst.This kind of metallic catalyst is in preparation process
In, after catalyst is fired, active component is the species of oxidation state, and catalyst also needs that active component is converted to gold by reduction
Belong to elemental species, such catalyst just has reactivity.
Large-scale catalyst plant has reduction apparatus both at home and abroad, and what these reduction apparatus were all made of is conventional fixation
Bed reduction furnace.When using fixed bed reduction furnace reducing catalyst, reduction furnace needs first loading catalyst, then displaced air, then rises
Temperature, which is gone forward side by side, goes back Primordial Qi reduction, then cools down, and finally draws off catalyst, completes reduction.The conventional reduction using fixed bed reduction furnace
Operation is intermittent operation, and it is long that there are reduction cycles, and complex steps are discontinuous, inefficiency, and effect is restored between batch and batch
The problems such as fruit has differences.
Summary of the invention
It is intermittent behaviour the technical problem to be solved by the present invention is to the restoring operation for existing fixed bed reduction furnace
Make, it is long that there are reduction cycles, and complex steps are discontinuous, inefficiency, and reduction effect, which has differences etc., between batch and batch asks
Topic proposes a kind of catalyst reduction device reducing catalyst that uses and can operate continuously for moving-bed type reaction unit.
The present invention solves above-mentioned technical problem and specifically uses technical solution as follows:
The catalyst reduction device that one kind of the present invention can operate continuously, the device is by catalyst mobile control system and gas circuit
Control system is constituted；Catalyst mobile control system connects all parts by pipeline, from top to bottom by for adding catalyst
Loading hopper (1), reduction furnace (2), cooling tank (6) and storage tank (8) constitute；Air-path control system is by by heating furnace (10), condensation
Device (3), air blower (4), cooler (7) and air blower (9) composition, wherein also Primordial Qi is followed by heating furnace (10), reduction furnace
(2), outlet as reduction is again introduced into reduction furnace to the forming circuit in the reduction furnace (2) afterwards for condenser (3), air blower (4),
Cooling air forming circuit in cooling tank (6) by cooler (7) and air blower (9).
Preferably, in catalyst mobile system, reduction furnace disposes setting gauge with the pipeline of cooling tank being connected, and passes through material toggling
The movement speed of the rotational speed regulation catalyst of device, to control residence time of the catalyst in reduction furnace.
Preferably, in air-path control system, the heating furnace is connect with ammonolysis craft machine, by ammonolysis craft machine provide hydrogen and
The gaseous mixture of nitrogen is as also Primordial Qi；The cooler is connect with nitrogen making machine, provides high pure nitrogen by nitrogen making machine.
The gaseous mixture that Primordial Qi is hydrogen and nitrogen is gone back in the present invention, the volume fraction that hydrogen accounts for gaseous mixture can be adjusted arbitrarily,
The reduction tolerance of air-path control system is added to by spinner flowmeter control.The temperature of Heating Furnace Control also Primordial Qi, will restore
The temperature control of gas is 100~900 DEG C.The internal circulating load of air compressor control also Primordial Qi, make also Primordial Qi volume space velocity 100~
20000h-1, moisture of the condenser condensation also in Primordial Qi.In the air-path control system of cooling tank, nitrogen making machine provide Nitrogen source gases and
Flow is controlled, cooler controls the temperature of nitrogen, and the temperature of low temperature nitrogen is controlled at 10~20 DEG C, and air compressor control nitrogen follows
Circular rector, 100~1000h of air speed of nitrogen-1.The pressure of cooling tank is micro-positive pressure.Catalyst is released from cooling tank every 1~5h,
It is sealed.
The catalyst reduction device that one kind of the invention can operate continuously, can be used for the reduction of various catalyst, such as expensive
Metallic catalyst and Ni catalyst are specifically exemplified as dehydrogenating propane Pt/Al2O3The reduction of catalyst, this kind of catalyst are used
In the reaction of preparing propylene by dehydrogenating propane.
The heated stove heating of catalyst reduction device also Primordial Qi that can be operated continuously through the invention enters to assigned temperature
Catalyst bed, then the water condensation for generating reduction through condenser, by air compressor control also Primordial Qi air speed.Nitrogen is dropped through cooler
Wen Hou, into as-reduced catalyst cooling in cooling tank, then through its internal circulating load of air compressor control.It is added from loading hopper to be restored
Catalyst into reduction furnace, setting gauge can be such that catalyst moves from top to bottom in reduction furnace, pass through adjust setting gauge turn
Speed, to control residence time of the catalyst in reduction furnace to realize abundant reducing catalyst.As-reduced catalyst is moved to
Cooling tank after dropping to room temperature, removes and completes reduction.Using apparatus of the present invention reducing catalyst, it can effectively shorten catalyst also
Temperature fall time after original avoids the repetitive operation of handling catalyst, improves catalyst reduction efficiency, realizes catalyst reduction
Can continuity and high efficiency.Test result discovery, using the catalyst reduction device operated continuously of the invention, compares use
Conventional method, the recovery time of catalyst shorten 90% or more, and 80% or more the air consumption reduction of hydrogen and nitrogen effectively mentions
High catalyst reduction efficiency and reduce catalyst manufacturing cost；And residence time of the catalyst in reduction furnace contracts significantly
It is short, the high degree of dispersion of precious metal atom on a catalyst is effectively guaranteed, improves the activity of catalyst.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of a specific embodiment of catalyst reduction device that can be operated continuously.
In figure, 1 loading hopper, 2 reduction furnaces, 3 condensers, 4 air blowers, 5 setting gauges, 6 cooling tanks, 7 coolers, 8 storage tanks, 9
Air blower, 10 heating furnaces, 11 also Primordial Qi, 12 nitrogen.
Specific embodiment
Embodiment below is for being specifically described technical principle of the invention, implementation method and effect, but this hair
Bright method and core concept is not limited except as.
Embodiment 1
The catalyst reduction device that the present invention can be operated continuously is applied to the reduction process of dehydrogenating propane Pt catalyst.Also
Primordial Qi is the gaseous mixture of hydrogen and nitrogen, and also the volume fraction of hydrogen is 20% in Primordial Qi, and also the air speed of Primordial Qi is 2000h-1, also
Former temperature is 500 DEG C.The air consumption and device of hydrogen used in reduction apparatus of the invention and nitrogen operate the catalysis after 100h
The also commercial weight of agent is shown in Table 1.
The specific restoring operation method of reduction apparatus of the invention is as follows: the loadings of reduction furnace 2 are 2m3, by reduction furnace 2
Catalyst is filled, electric furnace 10 heats up, and heating rate is 20 DEG C/h, while also Primordial Qi 11 is passed through into reduction furnace 2.Electric heating
After the temperature of furnace 10 rises to 500 DEG C, setting gauge 5 is opened, keeps the catalyst in reduction furnace 2 slowly moving into cooling tank 6.Together
When catalyst is supplemented from the upper end loading hopper 1 of reduction furnace 2 to reduction furnace 2, ensure that the amount of catalyst in reduction furnace 2 is always
2m3.The material toggling speed control of setting gauge 5 is moved to the time of 2 lower end of reduction furnace can just make the catalyst of 2 upper end of reduction furnace
It is 10h.The catalyst restored is moved in cooling tank 6, is passed through 20 DEG C of nitrogen 12 and is purged catalyst, the air speed of nitrogen 12 is
Adjustable, to ensure that the temperature of catalyst is down to room temperature is 5h, when the temperature of catalyst is cooled to room temperature, by catalyst from cooling
It is drawn off in tank 6.Metering device continuously runs the volume of the catalyst restored after 100h.
It is denoted as A with the catalyst that reduction apparatus of the invention restores, the catalyst A by reduction is anti-for dehydrogenating propane
Answer, reaction condition is as follows: 600 DEG C of reaction temperature, pressure is normal pressure, H2/ propane (ratio=0.6 mol, the air speed 1000h of propane-1。
Successive reaction 50h catalyst dehydrogenating propane average conversion and average selective data are shown in Table 2.
Comparative example 1
The air consumption and device of hydrogen used in traditional reduction apparatus and nitrogen operate the reduction of the catalyst after 100h
Amount is shown in Table 1.
The specific restoring operation method of traditional reduction apparatus is as follows: the loadings of reduction furnace are 2m3, reduction furnace is filled
Catalyst, electric furnace heating, heating rate are 20 DEG C/h, while being passed through into reduction furnace also Primordial Qi, also Primordial Qi be hydrogen and
The gaseous mixture of nitrogen, also the volume fraction of hydrogen is 20% in Primordial Qi, and also the air speed of Primordial Qi is 2000h-1,.The temperature of electric furnace
After degree rises to 500 DEG C, 10h at 500 DEG C is maintained.Then electric furnace stops heating, and it is room temperature that temperature is passed through into reduction furnace
N2Purging, N2Air speed be 1000h-1, N2The temperature of purging 20h catalyst is down to room temperature, and catalyst is unloaded from reduction furnace
Out, it is sealed, completes the reduction of a batch.Above-mentioned operation is repeated, the reduction of next batch is carried out.Metering device is continuous
The volume of the catalyst restored after operating 100h.
It is denoted as B with the catalyst that traditional reduction apparatus restores, the catalyst B by reduction is reacted for dehydrogenating propane,
Reaction condition is as the evaluation condition of catalyst A.Successive reaction 50h catalyst dehydrogenating propane average conversion and average selection
Property data are shown in Table 2.
The air consumption and and commercial weight contrast table of the reduction apparatus of the invention of table 1 and traditional reduction apparatus
The dehydrogenating propane response data contrast table of the reduction apparatus of the invention of table 2 and the catalyst of traditional reduction apparatus reduction
| Catalyst | Conversion of propane (%) | Propylene Selectivity (%) |
| A | 33.6 | 92.5 |
| B | 31.4 | 90.1 |
It can be seen that under the identical restoring operation time from the data of table 1, the catalytic amount of method reduction of the invention
It is 3 times of the catalytic amount of conventional method reduction, hydrogen air consumption is the 63% of conventional method air consumption, and nitrogen air consumption is to pass
The 83% of system method air consumption.From the data of table 2 can be seen that the catalyst that method of the invention restores conversion of propane and
Propylene Selectivity is higher than the catalyst of conventional method reduction.So reduction apparatus of the invention greatly improves catalysis
The efficiency of agent reduction, reduces the consumption of hydrogen and nitrogen, and significantly improve the reactivity worth of catalyst.
Claims (3)
1. the catalyst reduction device that one kind can operate continuously, it is characterised in that: by catalyst mobile control system and gas circuit control
System processed is constituted；All parts are connected by pipeline, from top to bottom by loading hopper (1), reduction furnace (2), cooling tank (6) and storage tank
(8) catalyst mobile control system is constituted；Air-path control system is by by heating furnace (10), condenser (3), air blower (4), cooling
Device (7) and air blower (9) composition, wherein also Primordial Qi is followed by heating furnace (10), reduction furnace (2), condenser (3), air blower
(4) outlet is used as reduction to be again introduced into reduction furnace to the forming circuit in reduction furnace (2) afterwards, and cooling air passes through cooler (7)
It is formed into a loop in cooling tank (6) with air blower (9).
2. the catalyst reduction device that one kind as described in claim 1 can operate continuously, it is characterised in that: the also Primordial Qi
The gaseous mixture of hydrogen and nitrogen is provided by ammonolysis craft machine, the cooling air provides high pure nitrogen by nitrogen making machine.
3. the catalyst reduction device that one kind as described in claim 1 can operate continuously, it is characterised in that: the reduction furnace
(2) be provided with setting gauge (5) on the pipeline of cooling tank (6) being connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811411967.3A CN109433277A (en) | 2018-11-25 | 2018-11-25 | A kind of catalyst reduction device operated continuously |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811411967.3A CN109433277A (en) | 2018-11-25 | 2018-11-25 | A kind of catalyst reduction device operated continuously |
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| CN109433277A true CN109433277A (en) | 2019-03-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110215883A (en) * | 2019-07-04 | 2019-09-10 | 浙江科技学院 | A kind of preparation facilities and preparation method of nanometer alloy catalyst |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1995402A (en) * | 2006-01-06 | 2007-07-11 | 伊尔技术有限公司 | Method for directly reducing iron oxide to metallic iron by using coke oven gas and the like |
| CN101100701A (en) * | 2007-07-31 | 2008-01-09 | 张文慧 | Method and device for producing sponge iron by using reducing gas prepared from coke oven gas |
| CN108014723A (en) * | 2017-12-29 | 2018-05-11 | 山东大学 | Utilize SO in active coke desulphurizing regeneration gas2The moving bed device and method of Recovered sulphur |
-
2018
- 2018-11-25 CN CN201811411967.3A patent/CN109433277A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1995402A (en) * | 2006-01-06 | 2007-07-11 | 伊尔技术有限公司 | Method for directly reducing iron oxide to metallic iron by using coke oven gas and the like |
| CN101100701A (en) * | 2007-07-31 | 2008-01-09 | 张文慧 | Method and device for producing sponge iron by using reducing gas prepared from coke oven gas |
| CN108014723A (en) * | 2017-12-29 | 2018-05-11 | 山东大学 | Utilize SO in active coke desulphurizing regeneration gas2The moving bed device and method of Recovered sulphur |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110215883A (en) * | 2019-07-04 | 2019-09-10 | 浙江科技学院 | A kind of preparation facilities and preparation method of nanometer alloy catalyst |
| CN110215883B (en) * | 2019-07-04 | 2022-05-06 | 浙江科技学院 | Preparation device and preparation method of nano alloy catalyst |
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Application publication date: 20190308 |