CN104548819A - Efficient washing device and method of catalyst in reaction gas - Google Patents
Efficient washing device and method of catalyst in reaction gas Download PDFInfo
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- CN104548819A CN104548819A CN201310512770.XA CN201310512770A CN104548819A CN 104548819 A CN104548819 A CN 104548819A CN 201310512770 A CN201310512770 A CN 201310512770A CN 104548819 A CN104548819 A CN 104548819A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
Abstract
The invention relates to an efficient washing device and method of a catalyst in reaction gas, and aims at mainly solving the problems in the prior art that the washing efficiency of the catalyst in the reaction gas at an outlet of a methanol-to-olefin fluidized bed reactor is low, the catalyst powder enters a subsequent system along the reaction gas to block equipment including a subsequent tower device, a heat exchanger and the like and a pipeline so that the operation period of the device is shortened. The problems are solved very well by adopting the technical scheme that the efficient washing device is composed of a shell, a reaction gas inlet, a reaction gas outlet, a reaction gas washing liquid inlet and a catalyst washing liquid outlet, wherein washing liquid spraying layers composed of nozzles which are arrayed according to a geometrical shape are arranged above the reaction gas inlet in the washing device and at the reaction gas washing liquid inlet; the included angle between the central lines of the spraying directions of the upper and lower adjacent spraying layers is 0-180 degrees; and reaction gas washing liquid is in contact with the reaction gas to wash the reaction gas. The efficient washing device can be used for an industrial methanol-to-olefin device.
Description
Technical field
The present invention relates to the high-efficient washing device and method of catalyst in a kind of 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 high-efficient washing device of catalyst in a kind of new reacting gas.This high-efficient washing device has rational in infrastructure, and gas-liquid contact is abundant, 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.
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 high-efficient washing method of catalyst in a kind of new reacting gas.It is reasonable that the method has process conditions, and washing methods is efficient, targetedly, 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: the high-efficient washing device of catalyst in a kind of reacting gas, high-efficient washing device 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 at least two-layerly to be arranged the cleaning solution spraying layer formed by geometry by shower nozzle, the angle of neighbouring spraying layer shower nozzle emission direction center line is 0 ~ 180 °, reaction gas inlet is arranged on high-efficient washing device bottom, reaction gas outlet is arranged on high-efficient washing device top, reacting gas cleaning solution entrance arranges and is above reaction gas inlet, the outlet of catalyst detergent liquid is arranged on high-efficient washing bottom of device.
In technique scheme, preferred technical scheme is, the preferable range of the reacting gas cleaning solution spraying layer that described reacting gas cleaning solution entrance is arranged is 3 ~ 10 layers, and more preferably scope is 3 ~ 4 layers; 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 preferable range of the angle of neighbouring spraying layer shower nozzle emission direction center line is 0 ~ 50 ° or 130 ~ 180 °, and more preferably scope is 0 ~ 30 ° or 150 ~ 180 °; 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, arranges gas distributor in high-efficient washing device reaction gas access, 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, below reacting gas cleaning solution entrance spraying layer, arranges column plate or filler above reaction gas inlet; 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, rotation column plate; Described filler is at least one in grid, regular corrugation filler, Raschig ring, Pall ring, cascade ring, intalox saddle.
In technique scheme, preferred technical scheme is, in the outlet of high-efficient washing bottom of device catalyst detergent liquid, catalyst recovery devices is set, retracting device comprises catalyst sedimentation groove and catalyst filtration machine, the outlet of high-efficient washing bottom of device cleaning solution 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 high-efficient washing method of catalyst in reacting gas, and adopt the high-efficient washing device of catalyst in any one above-mentioned reacting gas, 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, to spray ejection from the spraying layer of scrubbing tower, contact with reacting gas and wash;
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 high-efficient washing bottom of device.
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; The preferable range of the catalyst sedimentation groove time of staying is 1 ~ 36 hour, and more preferably scope is 2 ~ 12 hours.
Due to the high-efficient washing device and method of catalyst in reacting gas of the present invention, high-efficient washing device 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, neighbouring spraying layer shower nozzle emission direction center line is certain angle, reaction gas inlet is arranged on high-efficient washing device bottom, reaction gas outlet is arranged on high-efficient washing device top, reacting gas cleaning solution entrance arranges and is above reaction gas inlet, the outlet of catalyst detergent liquid is arranged on high-efficient washing bottom of device, by uniform temperature, with the reacting gas cleaning solution of reacting gas certain weight ratio to contact with reacting gas wash after to enter after above spraying layer with certain speed and remove knockout tower, catalyst detergent liquid after washing goes catalyst recovery devices from high-efficient washing bottom of device, 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 and spraying layer to spray formula spray, make gas-liquid contact even, improve cooling effect.
The present invention is not only applicable to the high-efficient washing of catalyst in reacting gas, is equally applicable to the high-efficient 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 high-efficient washing device of catalyst in reacting gas of the present invention, in the high-efficient washing device 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 angle of neighbouring spraying layer shower nozzle emission direction center line is 0 °, 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 high-efficient washing device shower nozzle spraying layer reaches 99.8%, high-efficient washing device 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 high-efficient washing device schematic diagram of catalyst in 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 reacting gas of the present invention, the high-efficient washing device technique 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]
A high-efficient washing device for catalyst in reacting gas, in the high-efficient washing device 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 angle of neighbouring spraying layer shower nozzle emission direction center line is 0 °, 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 high-efficient washing device shower nozzle spraying layer reaches 99.8%, high-efficient washing device 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]
A high-efficient washing device for catalyst in reacting gas, in the high-efficient washing device of fluidized-bed reactor outlet, arrange 10 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 angle of neighbouring spraying layer shower nozzle emission direction center line is 180 °, 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 the washing of high-efficient washing device reaches 99.6%, high-efficient washing device 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]
A high-efficient washing device for catalyst in reacting gas, in the high-efficient washing device 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 angle of neighbouring spraying layer shower nozzle emission direction center line is 30 °, the filler of 1 piece of theoretical plate is set above spraying layer as demister, below reacting gas cleaning solution spraying layer, the regular corrugation filler 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 the washing of high-efficient washing device reaches 99.7%, high-efficient washing device 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]
A high-efficient washing device for catalyst in reacting gas, in the high-efficient washing device 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 angle of neighbouring spraying layer shower nozzle emission direction center line is 50 °, 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 the washing of high-efficient washing device reaches 99.3%, high-efficient washing device 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]
A high-efficient washing device for catalyst in reacting gas, in the high-efficient washing device 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 angle of neighbouring spraying layer shower nozzle emission direction center line is 130 °, 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 the washing of high-efficient washing device reaches 99.6%, high-efficient washing device 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]
A high-efficient washing device for catalyst 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
2, the angle of neighbouring spraying layer shower nozzle emission direction center line is 130 °, above 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 the washing of high-efficient washing device reaches 99.8%, high-efficient washing device 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 7]
A high-efficient washing device for catalyst 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 rectangular pitch screw type shower nozzle, the arrangement density of shower nozzle is 4 shower nozzle/m
2, the angle of neighbouring spraying layer shower nozzle emission direction center line is 180 °, 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 the washing of high-efficient washing device reaches 99.9%, high-efficient washing device 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]
A high-efficient washing device for catalyst 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
2, the angle of neighbouring spraying layer shower nozzle emission direction center line is 150 °, board-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 the washing of high-efficient washing device reaches 99.8%, high-efficient washing device 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 9]
A high-efficient washing device for catalyst 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
2the angle of neighbouring spraying layer shower nozzle emission direction center line is 30 °, above spraying layer, wire mesh demister is set, the catalyst fines clearance carried secretly in reacting gas after the washing of high-efficient washing device reaches 99.8%, high-efficient washing device and follow-up system are without blocking, and knockout tower separative efficiency, heat exchanger heat transfer effect, SR, device load remain unchanged, and the plant running cycle reaches 17 months, extend the cycle of operation of device, achieve good technique effect.
[embodiment 10]
A kind of high-efficient washing method of catalyst 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, the angle of neighbouring spraying layer shower nozzle emission direction center line is 150 °, contact with reacting gas and wash, below reacting gas cleaning solution entrance, the rotation column plate of 2 pieces of theoretical plates is set above reaction gas inlet, reacting gas after washing enters the board-like demister above spraying layer with the speed of 25m/s, the outlet of high-efficient washing bottom of device catalyst detergent liquid arranges catalyst sedimentation groove and plate basket formula filter press reclaims catalytic component, the time of staying of catalyst sedimentation groove is 12 hours, the catalyst fines clearance carried secretly in the reacting gas of high-efficient washing device outlet reaches 99.8%, the rate of recovery of catalytic component is 92%, high-efficient washing device 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 high-efficient washing method of catalyst 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, the angle of neighbouring spraying layer shower nozzle emission direction center line is 130 °, contact with reacting gas and wash, below reacting gas cleaning solution entrance, the ladder filler of 2 pieces of theoretical plates is set above reaction gas inlet, reacting gas after washing enters the wire mesh demister above spraying layer with the speed of 1m/s, the outlet of high-efficient washing bottom of device arranges catalyst sedimentation groove and pressure filter reclaims catalytic component, the time of staying of catalyst sedimentation groove is 36 hours, the catalyst fines clearance carried secretly in the reacting gas of high-efficient washing device outlet reaches 99.7%, the rate of recovery of catalytic component is 92.5%, high-efficient washing device 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 high-efficient washing method of catalyst 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, the angle of neighbouring spraying layer shower nozzle emission direction center line is 180 °, contact with reacting gas and wash, below reacting gas cleaning solution entrance, the intalox saddle of 2 pieces of theoretical plates is set above reaction gas inlet, reacting gas after washing enters the material filling type demister above spraying layer with the speed of 50m/s, the outlet of high-efficient washing bottom of device arranges catalyst sedimentation groove and leaf filter reclaims catalytic component, the time of staying of catalyst sedimentation groove is 2 hours, the catalyst fines clearance carried secretly in the reacting gas of high-efficient washing device outlet reaches 99.7%, the rate of recovery of catalytic component is 91%, high-efficient washing device 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 high-efficient washing method of catalyst 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, the angle of neighbouring spraying layer shower nozzle emission direction center line is 50 °, contact with reacting gas and wash, reacting gas after washing enters the screen type demister above spraying layer with the speed of 0.2m/s, the outlet of high-efficient washing bottom of device arranges catalyst sedimentation groove and vacuum type filter reclaims catalytic component, the time of staying of catalyst sedimentation groove is 1 hour, the catalyst fines clearance carried secretly in the reacting gas of high-efficient washing device outlet reaches 99.8%, the rate of recovery of catalytic component is 90%, high-efficient washing device 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 high-efficient washing method of catalyst 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, the angle of neighbouring spraying layer shower nozzle emission direction center line is 0 °, contact with reacting gas and wash, reacting gas after washing enters the sieve-board type demister above spraying layer with the speed of 20m/s, the outlet of high-efficient washing bottom of device arranges catalyst sedimentation groove and centrifugal filter reclaims catalytic component, the time of staying of catalyst sedimentation groove is 12 hours, the catalyst fines clearance carried secretly in the reacting gas of high-efficient washing device outlet reaches 99.5%, the rate of recovery of catalytic component is 91.5%, high-efficient washing device 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 high-efficient washing method of catalyst 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, the angle of neighbouring spraying layer shower nozzle emission direction center line is 130 ° and contacts with reacting gas and wash, reacting gas after washing enters the board-like demister of bubble-cap above spraying layer with the speed of 2m/s, the outlet of high-efficient washing bottom of device cleaning solution arranges catalyst sedimentation groove and plate basket formula filter press reclaims catalytic component, the time of staying of catalyst sedimentation groove is 2 hours, the catalyst fines clearance carried secretly in the reacting gas of high-efficient washing device outlet reaches 99.5%, the rate of recovery of catalytic component is 90.5%, high-efficient washing device 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. the high-efficient washing device of catalyst in a reacting gas, high-efficient washing device 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 at least two-layerly to be arranged the cleaning solution spraying layer formed by geometry by shower nozzle, the angle of neighbouring spraying layer shower nozzle emission direction center line is 0 ~ 180 °, reaction gas inlet is arranged on high-efficient washing device bottom, reaction gas outlet is arranged on high-efficient washing device top, reacting gas cleaning solution entrance arranges and is above reaction gas inlet, the outlet of catalyst detergent liquid is arranged on high-efficient washing bottom of device.
2. the high-efficient washing device of catalyst in reacting gas according to claim 1, is characterized in that the cleaning solution spraying layer 3 ~ 10 layers that described reacting gas cleaning solution entrance is arranged; The arrangement density of cleaning solution spraying layer every layer of shower nozzle is 1 ~ 4 shower nozzle/m
2; The angle of neighbouring spraying layer shower nozzle emission direction center line is 0 ~ 50 ° or 130 ~ 180 °; 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.
3. the high-efficient washing device of catalyst in reacting gas according to claim 2, is characterized in that described cleaning solution spraying layer is 3 ~ 4 layers; The arrangement density of cleaning solution spraying layer every layer of shower nozzle is 1 ~ 2 shower nozzle/m
2; The angle of neighbouring spraying layer shower nozzle emission direction center line is 0 ~ 30 ° or 150 ~ 180 °.
4. the high-efficient washing device of catalyst in 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.
5. the high-efficient washing device of catalyst in 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.
6. the high-efficient washing device of catalyst in reacting gas according to claim 1, is characterized in that below described reacting gas cleaning solution entrance spraying layer, arranges column plate or filler above reaction gas inlet; Described column plate is at least one in float valve, sieve aperture, bubble-cap, guiding sieve aperture, rotation column plate; Described filler is at least one in grid, regular corrugation filler, Raschig ring, Pall ring, cascade ring, intalox saddle.
7. the high-efficient washing device of catalyst in reacting gas according to claim 1, it is characterized in that described high-efficient washing bottom of device 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. the high-efficient washing method of catalyst in reacting gas, adopt the high-efficient washing device of catalyst in any one reacting gas 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, to spray ejection from the spraying layer of scrubbing tower, contact with reacting gas and wash; 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 high-efficient washing bottom of device.
9. the high-efficient washing method of catalyst in 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; High-efficient washing bottom of device cleaning solution component loops is used as the cleaning solution of reacting gas.
10. the high-efficient washing method of catalyst in 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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