CN104548818A - Device and method for increasing washing efficiency of catalyst in reactant gas - Google Patents
Device and method for increasing washing efficiency of catalyst in reactant gas Download PDFInfo
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- CN104548818A CN104548818A CN201310512677.9A CN201310512677A CN104548818A CN 104548818 A CN104548818 A CN 104548818A CN 201310512677 A CN201310512677 A CN 201310512677A CN 104548818 A CN104548818 A CN 104548818A
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Abstract
The invention relates to a device and a method for increasing the washing efficiency of a catalyst in reactant gas, which are mainly used for solving the problems that the washing efficiency of the catalyst in the reactant gas at the outlet of a fluidized bed reactor for preparing low-carbon olefin with methyl alcohol is low, and catalyst fine powder flows along with the reactant into a follow-up system to block equipment such as a follow-up tower and a heat exchanger and pipelines and shorten the operating cycle of a device. The problems are well solved through the adoption of the technical scheme that the device comprises a housing, a reactant gas inlet, a reactant gas outlet, a reactant gas washing liquid inlet and a catalyst washing liquid outlet, wherein a washing liquid spraying layer, which is formed in such a way that spray nozzles are arranged in a geometrical shape, is arranged at the reactant gas washing liquid inlet and located in the device and above the reactant gas inlet, and reactant gas washing liquid and reactant gas are in countercurrent contact for washing. The device and the method can be used in an industrial device for preparing low-carbon olefin with methyl alcohol.
Description
Technical field
The present invention relates to a kind of device and method improving catalyst detergent efficiency in reacting gas.
Background technology
In preparing light olefins from methanol device, entrained catalyst fine powder in the reacting gas of fluidized-bed reactor outlet, must be removed in quench tower, otherwise enter follow-up system by causing the blocking of tower, heat exchanger, pipeline etc., cause SR to increase, tower separative efficiency declines, heat exchanger heat transfer effect declines, and device consumption increases, and the cycle of operation shortens, affect the normal operation of device, must stop time serious and clean.
In preparing light olefins from methanol device, quench tower is a key equipment, after the reacting gas of fluidized-bed reactor outlet is first precooled to about 240 ~ 280 DEG C from 450 ~ 500 DEG C, be cooled to about 100 ~ 150 DEG C further in quench tower, remove the catalyst fines carried secretly in reacting gas simultaneously.Due to the quench tower gas-liquid skewness in current preparing light olefins from methanol device, bad to the washing removal effect of catalyst fines, part catalyst fines enters follow-up system along with reacting gas, accumulate in equipment, pipeline inwall, along with the prolongation of running time, follow-up tower, heat exchanger, catalyst dirt layer in pipeline increases gradually, equipment, pipeline passway reduces gradually, cause pipeline not smooth, increase SR, when dirty layer reaches certain thickness, the separative efficiency of tower declines, the heat transfer effect of heat exchanger declines, system pressure obviously raises, worsen the operating conditions of device, device operational load declines, device consumption is increased, the cycle of operation shortens.After generally running 6 months for preparing light olefins from methanol device, tower, heat exchanger, pipeline just will result in blockage, and SR increases, and device load declines, and consume and will increase, affect the normal operation of device, until be forced to cleaning during shutdown.
In reacting gas, catalyst fines washs the Main Bottleneck that the not high system jams caused of removal efficiency is preparing light olefins from methanol device long-term operation in quench tower, not only affect the overall operation cycle of device, too increase equipment cleaning charge with and stop, the loss and waste of startup procedure Raw and product, affect the economic benefit of device.Therefore, in quench tower, catalyst fines is removed, avoid entering follow-up system and result in blockage, the cycle of operation of extension fixture, be of great practical significance and economic benefit.
Document CN1100851C describes quench tower and the quick cooling method of hydro carbons fluidisation catalytic conversion reaction product.Quench tower be followed successively by from top to bottom gas phase separation district, chilling heat transfer and catalyst dust scrubbing section, Liquid level district, be suitable for the chilling to high temperate zone catalyst dust reactant.The pyroreaction logistics come from settler is introduced bottom quench tower, quench liquid introduces chilling heat transfer and catalyst dust scrubbing section top, reactant to be conducted heat by chilling on flowing to and catalyst dust scrubbing section directly contacts with the quench liquid moved down and carries out heat exchange, a small amount of catalyst dust that reaction logistics is carried is taken away by quench liquid, go out quench tower with the quench liquid after reaction stream contacts by dust-laden quench liquid outlet, the reacting gas after cooling upwards goes out quench tower by gas phase separation district from gas vent.The method is provided with baffle plate as catalyst detergent district at quench tower housing central section, and the contact of quench liquid and reacting gas is insufficient, and catalyst dust can not all be washed down, and enters the gas phase separation district on top, affect device and normally run with reacting gas.
Summary of the invention
One of technical problem to be solved by this invention, be to exist in prior art in preparing light olefins from methanol device, there is quench tower design unreasonable, gas-liquid skewness, gas-liquid contact is insufficient, catalyst fines washing removal efficiency is not high, catalyst fines enters follow-up tower, heat exchanger and pipeline system, follow-up equipment, pipeline is caused to block, cause SR to increase, operating load declines, and device consumption increases, the problem that the cycle of operation shortens, provides the device of catalyst detergent efficiency in a kind of raising reacting gas newly.This device has rational in infrastructure, and gas-liquid contact is abundant, and catalyst fines washing removal efficiency is high, effectively reduces the catalyst fines entering follow-up system, the resistance of systems stabilisation, the comparatively low consumption level of holdout device, the advantage of the extension fixture cycle of operation.
Technical problem two to be solved by this invention, be to exist in prior art in preparing light olefins from methanol device, the washing methods and the process conditions that there is quench tower catalyst are unreasonable, catalyst fines washing removal efficiency is not high, catalyst fines enters follow-up tower, heat exchanger and pipeline system, follow-up equipment, pipeline is caused to block, SR is caused to increase, operating load declines, device consumption increases, operation operating cost is high, the problem that the cycle of operation shortens, and provides the method for catalyst detergent efficiency in a kind of raising reacting gas newly.It is reasonable that the method has process conditions, and washing methods is targeted, and catalyst fines washing removal efficiency is high, effective reduction enters the catalyst fines of follow-up system, the resistance of systems stabilisation, the comparatively low consumption level of holdout device, the advantage of the extension fixture cycle of operation.
For one of solving the problems of the technologies described above, the technical solution used in the present invention is as follows: a kind of device improving catalyst detergent efficiency in reacting gas, described device is exported by housing, reaction gas inlet and outlet, reacting gas cleaning solution entrance and catalyst detergent liquid and forms, and arranges to be arranged the cleaning solution spraying layer formed by geometry by shower nozzle at wash mill reaction gases entrance top, reacting gas cleaning solution entrance.
In technique scheme, preferred technical scheme is, the preferable range of described reacting gas cleaning solution spraying layer is 1 ~ 8 layer, and more preferably scope is 2 ~ 4 layers, and most preferred range is 1 ~ 2 layer; The preferable range of the arrangement density of every layer of spraying layer shower nozzle is 1 ~ 4 shower nozzle/m
2, more preferably scope is 1 ~ 2 shower nozzle/m
2; The geometry of every layer of water-spraying fabric is at least one in square, rectangle, equilateral triangle, concentric circles annular; Described shower nozzle is at least one in hollow cone, solid-cone, screw type, air atomizing shower nozzle.
In technique scheme, preferred technical scheme is, below described reacting gas cleaning solution entrance spraying layer, the column plate that arranges above reaction gas inlet or filler, the preferable range of the number of theoretical plate of column plate or filler is 1 ~ 10 piece, and more preferably scope is 2 ~ 6 pieces; Described column plate is at least one in float valve, sieve aperture, bubble-cap, guiding sieve aperture; Described filler is at least one in grid, structured wire corrugated wire gauze packing, Raschig ring, Pall ring.
In technique scheme, preferred technical scheme is, arranges gas distributor at quench tower reaction gas inlet, and gas distributor pattern is at least one in semicircle cast, pipe distributor, dendroid porous type, biserial vane type.
In technique scheme, preferred technical scheme is, above spraying layer, arranges demister, and demister is at least one in board-like demister, wire mesh demister, bubble cap tray, sieve plate, filler; Demister is bubble cap tray, the preferable range of the number of theoretical plate of sieve plate is 1 ~ 5 piece, and more preferably scope is 1 ~ 2 piece; Demister is the preferable range of the number of theoretical plate of filler is 1 ~ 5 piece, and more preferably scope is 1 ~ 2 piece.
In technique scheme, preferred technical scheme is, in the outlet of wash tower bottoms catalyst detergent liquid, catalyst recovery devices is set, retracting device comprises catalyst sedimentation groove and catalyst filtration machine, the outlet of quench tower bottom wash liquid is connected with the import of catalyst sedimentation groove, and the outlet of catalyst sedimentation groove is connected with the import of catalyst filtration machine; Catalyst filtration machine is at least one in filter, centrifugal filter, pressing filter, leaf filter, vacuum type filter, plate basket formula filter press.
For solve the problems of the technologies described above two, the technical solution used in the present invention is as follows: a kind of method improving catalyst detergent efficiency in reacting gas, adopt the device of catalyst detergent efficiency in any one raising reacting gas described above, washing methods comprises following step:
A) be 10 ~ 300 DEG C by temperature, be the reacting gas cleaning solution of 0.3 ~ 18 with the weight ratio of reacting gas, spray from the spraying layer of scrubbing tower, wash with reacting gas counter current contacting;
B) reacting gas after washing enters after above spraying layer with the speed of 0.2 ~ 50m/s and removes knockout tower;
C) the catalyst detergent liquid after washing goes catalyst recovery devices from wash tower bottoms.
In technique scheme, preferred technical scheme is, the preferable range of the described cleaning solution temperature contacted with reacting gas is 50 ~ 250 DEG C, and more preferably scope is 80 ~ 150 DEG C; The preferable range of cleaning solution and reacting gas weight ratio is 1 ~ 5, and more preferably scope is 1.5 ~ 3; Enter above spraying layer the preferable range of reacting gas speed be 1 ~ 25m/s, more preferably scope is 2 ~ 20m/s.
Preferred technical scheme is, washing methods comprises following step:
A) be 10 ~ 280 DEG C by temperature, be the reacting gas cleaning solution of 0.3 ~ 18 with the weight ratio of reacting gas, spray from the spraying layer of scrubbing tower, wash with reacting gas counter current contacting; B) reacting gas after washing enters after above spraying layer with the speed of 0.2 ~ 50m/s and removes knockout tower; C) the catalyst detergent liquid after washing goes catalyst recovery devices from wash tower bottoms.
In technique scheme, preferred technical scheme is, is 10 ~ 250 DEG C, is the reacting gas cleaning solution of 0.3 ~ 18 with the weight ratio of reacting gas, spray the temperature of step a), wash with reacting gas counter current contacting from the spraying layer of scrubbing tower.
Due to the device and method of catalyst detergent efficiency in raising reacting gas of the present invention, wash mill is by housing, reaction gas inlet and outlet, reacting gas cleaning solution entrance and catalyst detergent liquid outlet composition, at wash mill reaction gases entrance top, reacting gas cleaning solution entrance is arranged to be arranged the cleaning solution spraying layer formed by geometry by shower nozzle, by uniform temperature, enter above spraying layer with certain speed after washing with the reacting gas cleaning solution of reacting gas certain weight ratio and reacting gas counter current contacting and remove knockout tower, catalyst detergent liquid after washing goes catalyst recovery devices from wash tower bottoms, reacting gas cleaning solution contacts with reacting gas fully, not only effectively eliminate the catalyst fines carried secretly in reacting gas, stabilize SR, maintain the consumption level that device is lower, extend the cycle of operation of device, decrease the frequency of cleaning during shutdown, and adopt shower nozzle spray, make gas-liquid contact even, enhance quench tower heat transfer efficiency, improve quench tower cooling effect.
The present invention is not only applicable to improve catalyst detergent in reacting gas, is equally applicable to the washing of catalyst fines and the heavy constituent of carrying secretly in fluidized-bed reactor outlet reacting gas, and is applicable to the cooling of fluidized-bed reactor outlet reacting gas.
Adopt the device of catalyst detergent efficiency in raising reacting gas of the present invention, in the scrubbing tower of fluidized-bed reactor outlet, arrange 2 layers to be arranged the reacting gas cleaning solution spraying layer formed by square by hollow cone shower nozzle, the arrangement density of shower nozzle is 2 shower nozzle/m
2, the bubble cap tray of 2 pieces of theoretical plates is set above spraying layer as demister, below reacting gas cleaning solution spraying layer, the grid packing of 6 pieces of theoretical plates is set above reaction gas inlet, reaction gas inlet arranges dendroid porous type distributor, the catalyst fines washing clearance carried secretly in reacting gas after the washing of scrubbing tower shower nozzle spraying layer reaches 99.8%, quench tower and follow-up system are without blocking, knockout tower separative efficiency, heat exchanger heat transfer effect, SR, device load remains unchanged, the plant running cycle reaches 18 months, extend the cycle of operation of device, achieve good technique effect.
Accompanying drawing explanation
Fig. 1 is the device schematic diagram of catalyst detergent efficiency in raising reacting gas of the present invention;
In Fig. 1,1 is scrubbing tower, and 2 is gas distributor, and 3 is reaction gas inlet, and 4 is column plate or filler, and 5 is reacting gas cleaning solution spraying layer, and 6 is demister, and 7 is reaction gas outlet, and 8 is reacting gas cleaning solution entrance, and 9 is the outlet of catalyst detergent liquid.
In reaction for preparing light olefins from methanol gas of the present invention, the eliminating equipment technical process of catalyst is as follows: fluidized-bed reaction product enters scrubbing tower 1 bottom from reaction gas inlet 3, the reacting gas cleaning solution 8 sprayed after gas distributor 2 and from reacting gas cleaning solution spraying layer 5 carries out counter current contacting washing in column plate or packing layer 4, remove knockout tower from reaction gas outlet 7 after reacting gas after washing enters demister 6, catalyst detergent liquid 9 goes catalyst recovery devices.
Below by specific embodiment, the invention will be further elaborated.
Detailed description of the invention
[comparative example 1]
In preparing light olefins from methanol device quench tower, baffle plate is set, cleaning solution and reacting gas carry out catalyst detergent and reacting gas cools in baffle plate district counter current contacting, when device runs 6 months continuously, blocking is assembled in the agent of quench tower upper catalyst, quench tower outlet reacting gas temperature raises 8 DEG C, the knockout tower that quench tower is follow-up, heat exchanger, pipeline results in blockage, cause separating tower column plate and tower body catalyst fines to gather and block not Chang, knockout tower separative efficiency declines, heat exchanger heat transfer effect obviously declines, pipe resistance increases, device load declines 10%, affect the normal operation of device, can only cleaning during shutdown.
[comparative example 2]
In preparing light olefins from methanol device quench tower, baffle plate is set, temperature is 150 DEG C, with the weight ratio of reacting gas be 3 reacting gas cleaning solution and reacting gas carry out catalyst detergent and reacting gas cools in baffle plate district counter current contacting, when device runs 6 months continuously, blocking is assembled in the agent of quench tower upper catalyst, quench tower outlet reacting gas temperature raises 7 DEG C, the knockout tower that quench tower is follow-up, heat exchanger, pipeline results in blockage, cause separating tower column plate and tower body catalyst fines to gather and block not Chang, knockout tower separative efficiency declines, heat exchanger heat transfer effect obviously declines, pipe resistance increases, device load declines 10%, affect the normal operation of device, can only cleaning during shutdown.
[embodiment 1]
Improve a device for catalyst detergent efficiency in reacting gas, in the scrubbing tower of fluidized-bed reactor outlet, arrange 2 layers to be arranged the reacting gas cleaning solution spraying layer formed by square by hollow cone shower nozzle, the arrangement density of shower nozzle is 2 shower nozzle/m
2, the bubble cap tray of 2 pieces of theoretical plates is set above spraying layer as demister, below reacting gas cleaning solution spraying layer, the grid packing of 6 pieces of theoretical plates is set above reaction gas inlet, reaction gas inlet arranges dendroid porous type distributor, the catalyst fines washing clearance carried secretly in reacting gas after scrubbing tower shower nozzle spray washing reaches 99.8%, scrubbing tower and follow-up system are without blocking, knockout tower separative efficiency, heat exchanger heat transfer effect, SR, device load remains unchanged, the plant running cycle reaches 18 months, extend the cycle of operation of device, achieve good technique effect.
[embodiment 2]
Improve a device for catalyst detergent efficiency in reacting gas, in the scrubbing tower of fluidized-bed reactor outlet, arrange 8 layers to be arranged the reacting gas cleaning solution spraying layer formed by equilateral triangle by solid-cone shower nozzle, the arrangement density of shower nozzle is 1 shower nozzle/m
2, the sieve plate of 1 piece of theoretical plate is set above spraying layer as demister, below reacting gas cleaning solution spraying layer, the Raschig ring filler of 10 pieces of theoretical plates is set above reaction gas inlet, reaction gas inlet arranges biserial blade distributor, the catalyst fines clearance carried secretly in reacting gas after scrubbing tower shower nozzle spray washing reaches 99.6%, scrubbing tower and follow-up system are without blocking, knockout tower separative efficiency, heat exchanger heat transfer effect, SR, device load remains unchanged, the plant running cycle reaches 15 months, extend the cycle of operation of device, achieve good technique effect.
[embodiment 3]
Improve a device for catalyst detergent efficiency in reacting gas, in the scrubbing tower of fluidized-bed reactor outlet, arrange 1 layer of reacting gas cleaning solution spraying layer be made up of by rectangular pitch screw type shower nozzle, the arrangement density of shower nozzle is 4 shower nozzle/m
2, the filler of 1 piece of theoretical plate is set above spraying layer as demister, below reacting gas cleaning solution spraying layer, the structured wire corrugated wire gauze packing of 2 pieces of theoretical plates is set above reaction gas inlet, reaction gas inlet arranges semicircle cast distributor, the catalyst fines clearance carried secretly in reacting gas after scrubbing tower shower nozzle spray washing reaches 99.7%, scrubbing tower and follow-up system are without blocking, knockout tower separative efficiency, heat exchanger heat transfer effect, SR, device load remains unchanged, the plant running cycle reaches 16 months, extend the cycle of operation of device, achieve good technique effect.
[embodiment 4]
Improve a device for catalyst detergent efficiency in reacting gas, in the scrubbing tower of fluidized-bed reactor outlet, arrange 4 layers of reacting gas cleaning solution spraying layer be made up of by concentric circles annular arrangement hollow cone shower nozzle, the arrangement density of shower nozzle is 2 shower nozzle/m
2, the filler of 2 pieces of theoretical plates is set above spraying layer as demister, below reacting gas cleaning solution spraying layer, the valve tray of 1 piece of theoretical plate is set above reaction gas inlet, reaction gas inlet arranges pipe distributor, the catalyst fines clearance carried secretly in reacting gas after scrubbing tower shower nozzle spray washing reaches 99.3%, scrubbing tower and follow-up system are without blocking, knockout tower separative efficiency, heat exchanger heat transfer effect, SR, device load remains unchanged, the plant running cycle reaches 12 months, extend the cycle of operation of device, achieve good technique effect.
[embodiment 5]
Improve a device for catalyst detergent efficiency in reacting gas, in the scrubbing tower of fluidized-bed reactor outlet, arrange 2 layers of reacting gas cleaning solution spraying layer be made up of by rectangular pitch screw type shower nozzle, the arrangement density of shower nozzle is 4 shower nozzle/m
2, the filler of 5 pieces of theoretical plates is set above spraying layer as demister, below reacting gas cleaning solution spraying layer, the linde sieve tray of 2 pieces of theoretical plates is set above reaction gas inlet, reaction gas inlet arranges semicircle cast distributor, the catalyst fines clearance carried secretly in reacting gas after scrubbing tower shower nozzle spray washing reaches 99.6%, scrubbing tower and follow-up system are without blocking, knockout tower separative efficiency, heat exchanger heat transfer effect, SR, device load remains unchanged, the plant running cycle reaches 14 months, extend the cycle of operation of device, achieve good technique effect.
[embodiment 6]
Improve a device for catalyst detergent efficiency in reacting gas, in the cold tower of washing of fluidized-bed reactor outlet, arrange 1 layer of reacting gas cleaning solution spraying layer be made up of by rectangular pitch solid-cone shower nozzle, the arrangement density of shower nozzle is 2 shower nozzle/m
2above spraying layer, wire mesh demister is set, below reacting gas cleaning solution spraying layer, the bubble-cap of 1 piece of theoretical plate is set above reaction gas inlet, reaction gas inlet arranges pipe distributor, the catalyst fines clearance carried secretly in reacting gas after scrubbing tower shower nozzle spray washing reaches 99.8%, scrubbing tower and follow-up system are without blocking, knockout tower separative efficiency, heat exchanger heat transfer effect, SR, device load remain unchanged, the plant running cycle reaches 17 months, extend the cycle of operation of device, achieve good technique effect.
[embodiment 7]
Improve a device for catalyst detergent efficiency in reacting gas, in the scrubbing tower of fluidized-bed reactor outlet, arrange 2 layers of reacting gas cleaning solution spraying layer be made up of by rectangular pitch screw type shower nozzle, the arrangement density of shower nozzle is 4 shower nozzle/m
2, board-like demister is set above spraying layer, below reacting gas cleaning solution spraying layer, the Pall ring filler of 1 piece of theoretical plate is set above reaction gas inlet, reaction gas inlet arranges biserial blade distributor, the catalyst fines clearance carried secretly in reacting gas after scrubbing tower shower nozzle spray washing reaches 99.9%, scrubbing tower and follow-up system are without blocking, knockout tower separative efficiency, heat exchanger heat transfer effect, SR, device load remains unchanged, the plant running cycle reaches 18 months, extend the cycle of operation of device, achieve good technique effect.
[embodiment 8]
Improve a device for catalyst detergent efficiency in reacting gas, in the scrubbing tower of fluidized-bed reactor outlet, arrange 2 layers to be arranged the reacting gas cleaning solution spraying layer formed by square by air atomizing shower nozzle, the arrangement density of shower nozzle is 1 shower nozzle/m
2board-like demister is set above spraying layer, below reacting gas cleaning solution spraying layer, the sieve tray of 1 piece of theoretical plate is set above reaction gas inlet, reaction gas inlet arranges semicircle cast distributor, the catalyst fines washing clearance carried secretly in reacting gas after scrubbing tower shower nozzle spray washing reaches 99.8%, scrubbing tower and follow-up system are without blocking, knockout tower separative efficiency, heat exchanger heat transfer effect, SR, device load remain unchanged, the plant running cycle reaches 16 months, extend the cycle of operation of device, achieve good technique effect.
[embodiment 9]
Improve a device for catalyst detergent efficiency in reacting gas, in the cold tower of washing of fluidized-bed reactor outlet, arrange 2 layers of reacting gas cleaning solution spraying layer be made up of by rectangular pitch solid-cone shower nozzle, the arrangement density of shower nozzle is 2 shower nozzle/m
2above spraying layer, wire mesh demister is set, the catalyst fines clearance carried secretly in reacting gas after scrubbing tower shower nozzle spray washing reaches 99.8%, scrubbing tower and follow-up system are without blocking, knockout tower separative efficiency, heat exchanger heat transfer effect, SR, device load remain unchanged, the plant running cycle reaches 17 months, extends the cycle of operation of device, achieves good technique effect.
[embodiment 10]
A kind of method improving catalyst detergent efficiency in reacting gas, it is 150 DEG C by temperature, the reacting gas cleaning solution being 5 with the weight ratio of reacting gas sprays from being arranged the cleaning solution spraying layer that forms by square by hollow cone shower nozzle, wash with reacting gas counter current contacting, reacting gas after washing enters the board-like demister above spraying layer with the speed of 25m/s, the catalyst fines clearance carried secretly in the reacting gas of scrubbing tower outlet reaches 99.8%, scrubbing tower and follow-up system are without blocking, knockout tower separative efficiency, heat exchanger heat transfer effect, SR, device load remains unchanged, the plant running cycle reaches 18 months, extend the cycle of operation of device, achieve good technique effect.
[embodiment 11]
A kind of method improving catalyst detergent efficiency in reacting gas, it is 300 DEG C by temperature, the reacting gas cleaning solution being 1 with the weight ratio of reacting gas sprays from being arranged the cleaning solution spraying layer that forms by equilateral triangle by solid-cone shower nozzle, wash with reacting gas counter current contacting, reacting gas after washing enters the wire mesh demister above spraying layer with the speed of 1m/s, the catalyst fines clearance carried secretly in the reacting gas of scrubbing tower outlet reaches 99.7%, scrubbing tower and follow-up system are without blocking, knockout tower separative efficiency, heat exchanger heat transfer effect, SR, device load remains unchanged, the plant running cycle reaches 16 months, extend the cycle of operation of device, achieve good technique effect.
[embodiment 12]
A kind of method improving catalyst detergent efficiency in reacting gas, it is 50 DEG C by temperature, the reacting gas cleaning solution being 3 with the weight ratio of reacting gas sprays from the cleaning solution spraying layer be made up of by rectangular pitch screw type shower nozzle, wash with reacting gas counter current contacting, reacting gas after washing enters the material filling type demister above spraying layer with the speed of 50m/s, the catalyst fines clearance carried secretly in the reacting gas of scrubbing tower outlet reaches 99.7%, scrubbing tower and follow-up system are without blocking, knockout tower separative efficiency, heat exchanger heat transfer effect, SR, device load remains unchanged, the plant running cycle reaches 15 months, extend the cycle of operation of device, achieve good technique effect.
[embodiment 13]
A kind of method improving catalyst detergent efficiency in reacting gas, it is 80 DEG C by temperature, the reacting gas cleaning solution being 18 with the weight ratio of reacting gas sprays from the cleaning solution spraying layer be made up of by concentric circles annular arrangement air atomizing shower nozzle, wash with reacting gas counter current contacting, reacting gas after washing enters the screen type demister above spraying layer with the speed of 0.2m/s, the catalyst fines clearance carried secretly in the reacting gas of scrubbing tower outlet reaches 99.8%, scrubbing tower and follow-up system are without blocking, knockout tower separative efficiency, heat exchanger heat transfer effect, SR, device load remains unchanged, the plant running cycle reaches 17 months, extend the cycle of operation of device, achieve good technique effect.
[embodiment 14]
A kind of method improving catalyst detergent efficiency in reacting gas, it is 250 DEG C by temperature, the reacting gas cleaning solution being 1.5 with the weight ratio of reacting gas sprays from being arranged the cleaning solution spraying layer that forms by square by solid-cone shower nozzle, wash with reacting gas counter current contacting, reacting gas after washing enters the sieve-board type demister above spraying layer with the speed of 20m/s, the catalyst fines clearance carried secretly in the reacting gas of scrubbing tower outlet reaches 99.5%, scrubbing tower and follow-up system are without blocking, knockout tower separative efficiency, heat exchanger heat transfer effect, SR, device load remains unchanged, the plant running cycle reaches 14 months, extend the cycle of operation of device, achieve good technique effect.
[embodiment 15]
A kind of method improving catalyst detergent efficiency in reacting gas, it is 10 DEG C by temperature, the reacting gas cleaning solution being 0.3 with the weight ratio of reacting gas sprays from being arranged the cleaning solution spraying layer that forms by equilateral triangle by hollow cone shower nozzle, wash with reacting gas counter current contacting, reacting gas after washing enters the board-like demister of bubble-cap above spraying layer with the speed of 2m/s, the catalyst fines clearance carried secretly in the reacting gas of scrubbing tower outlet reaches 99.5%, scrubbing tower and follow-up system are without blocking, knockout tower separative efficiency, heat exchanger heat transfer effect, SR, device load remains unchanged, the plant running cycle reaches 15 months, extend the cycle of operation of device, achieve good technique effect.
Claims (10)
1. one kind is improved the device of catalyst detergent efficiency in reacting gas, described device is exported by housing, reaction gas inlet and outlet, reacting gas cleaning solution entrance and catalyst detergent liquid and forms, and arranges to be arranged the cleaning solution spraying layer formed by geometry by shower nozzle at wash mill reaction gases entrance top, reacting gas cleaning solution entrance.
2. the device of catalyst detergent efficiency in raising reacting gas according to claim 1, is characterized in that described reacting gas cleaning solution spraying layer is 1 ~ 8 layer; The arrangement density of cleaning solution spraying layer every layer of shower nozzle is 1 ~ 4 shower nozzle/m
2; The geometry of every layer of water-spraying fabric is at least one in square, rectangle, equilateral triangle, concentric circles annular; Described shower nozzle is at least one in hollow cone, solid-cone, screw type, air atomizing shower nozzle; Below reacting gas cleaning solution entrance spraying layer, column plate or filler are set above reaction gas inlet.
3. the device of catalyst detergent efficiency in raising reacting gas according to claim 2, is characterized in that described cleaning solution spraying layer is 2 ~ 4 layers; The arrangement density of cleaning solution spraying layer every layer of shower nozzle is 1 ~ 2 shower nozzle/m
2; Below reacting gas cleaning solution entrance spraying layer, the number of theoretical plate of the column plate that arranges above reaction gas inlet or filler is 1 ~ 10 piece; Described column plate is at least one in float valve, sieve aperture, bubble-cap, guiding sieve aperture; Described filler is at least one in grid, structured wire corrugated wire gauze packing, Raschig ring, Pall ring.
4. the device of catalyst detergent efficiency in raising reacting gas according to claim 3, is characterized in that described cleaning solution spraying layer is 1 ~ 2 layer; Below reacting gas cleaning solution entrance spraying layer, the number of theoretical plate of the column plate that arranges above reaction gas inlet or filler is 2 ~ 6 pieces.
5. the device of catalyst detergent efficiency in raising reacting gas according to claim 1, it is characterized in that described reaction gas inlet arranges gas distributor, gas distributor pattern is at least one in semicircle cast, pipe distributor, dendroid porous type, biserial vane type.
6. the device of catalyst detergent efficiency in raising reacting gas according to claim 1, it is characterized in that arranging demister above described spraying layer, demister is at least one in board-like demister, wire mesh demister, bubble cap tray, sieve plate, filler.
7. the device of catalyst detergent efficiency in raising reacting gas according to claim 1, it is characterized in that described wash tower bottoms catalyst detergent liquid outlet arranges catalyst recovery devices, retracting device comprises catalyst sedimentation groove and catalyst filtration machine, the outlet of quench tower bottom wash liquid is connected with the import of catalyst sedimentation groove, and the outlet of catalyst sedimentation groove is connected with the import of catalyst filtration machine; Catalyst filtration machine is at least one in filter, centrifugal filter, pressing filter, leaf filter, vacuum type filter, plate basket formula filter press.
8. improve a method for catalyst detergent efficiency in reacting gas, adopt any one wash mill in claim 1 ~ 7, washing methods comprises following step:
A) be 10 ~ 300 DEG C by temperature, be the reacting gas cleaning solution of 0.3 ~ 18 with the weight ratio of reacting gas, spray from the spraying layer of scrubbing tower, wash with reacting gas counter current contacting;
B) reacting gas after washing enters after above spraying layer with the speed of 0.2 ~ 50m/s and removes knockout tower;
C) the catalyst detergent liquid after washing goes catalyst recovery devices from wash tower bottoms.
9. the method for catalyst detergent efficiency in raising reacting gas according to claim 8, is characterized in that the temperature of the described reacting gas cleaning solution contacted with reacting gas is 50 ~ 250 DEG C; The weight ratio of cleaning solution and reacting gas is 1 ~ 5; The speed entering the reacting gas above spraying layer is 1 ~ 25m/s; Quench tower bottom wash liquid component loops is used as the cleaning solution of reacting gas.
10. the method for catalyst detergent efficiency in raising reacting gas according to claim 9, is characterized in that the temperature of the described reacting gas cleaning solution contacted with reacting gas is 80 ~ 150 DEG C; The weight ratio of cleaning solution and reacting gas is 1.5 ~ 3; The speed entering the reacting gas above spraying layer is 2 ~ 20m/s.
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| CN106595334A (en) * | 2016-12-08 | 2017-04-26 | 中山大学 | Water-saving fog-dissipation closed cooling tower with float valve structure |
| CN109141065A (en) * | 2017-06-15 | 2019-01-04 | 广州新致晟环保科技有限公司 | Tail gas clean-up and heat recovery system and method for Treatment of Sludge |
| CN110878216A (en) * | 2018-09-05 | 2020-03-13 | 国家能源投资集团有限责任公司 | Fischer-Tropsch synthesis process, Fischer-Tropsch synthesis system and application of Fischer-Tropsch synthesis system |
| CN111617729A (en) * | 2020-06-10 | 2020-09-04 | 湖南长科诚享石化科技有限公司 | Countercurrent continuous contact unit and countercurrent continuous contact device |
| CN111821785A (en) * | 2019-04-17 | 2020-10-27 | 国家能源投资集团有限责任公司 | Method for removing catalyst particles carried by Fischer-Tropsch synthesis tail gas and system and application used by method |
| CN115315303A (en) * | 2020-02-26 | 2022-11-08 | 环球油品有限责任公司 | Process and apparatus for quenching a reactor effluent stream |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106595334A (en) * | 2016-12-08 | 2017-04-26 | 中山大学 | Water-saving fog-dissipation closed cooling tower with float valve structure |
| CN109141065A (en) * | 2017-06-15 | 2019-01-04 | 广州新致晟环保科技有限公司 | Tail gas clean-up and heat recovery system and method for Treatment of Sludge |
| CN109141065B (en) * | 2017-06-15 | 2024-06-07 | 广州正晟科技有限公司 | Tail gas purification and heat recovery system and method for sludge treatment |
| CN110878216A (en) * | 2018-09-05 | 2020-03-13 | 国家能源投资集团有限责任公司 | Fischer-Tropsch synthesis process, Fischer-Tropsch synthesis system and application of Fischer-Tropsch synthesis system |
| CN111821785A (en) * | 2019-04-17 | 2020-10-27 | 国家能源投资集团有限责任公司 | Method for removing catalyst particles carried by Fischer-Tropsch synthesis tail gas and system and application used by method |
| CN115315303A (en) * | 2020-02-26 | 2022-11-08 | 环球油品有限责任公司 | Process and apparatus for quenching a reactor effluent stream |
| CN115315303B (en) * | 2020-02-26 | 2024-04-02 | 环球油品有限责任公司 | Process and apparatus for quenching a reactor effluent stream |
| CN111617729A (en) * | 2020-06-10 | 2020-09-04 | 湖南长科诚享石化科技有限公司 | Countercurrent continuous contact unit and countercurrent continuous contact device |
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