CN102139180A - Refining catalyst spray drying tail gas/roasting tail gas purifying treatment method and equipment - Google Patents
Refining catalyst spray drying tail gas/roasting tail gas purifying treatment method and equipment Download PDFInfo
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- CN102139180A CN102139180A CN2010101070111A CN201010107011A CN102139180A CN 102139180 A CN102139180 A CN 102139180A CN 2010101070111 A CN2010101070111 A CN 2010101070111A CN 201010107011 A CN201010107011 A CN 201010107011A CN 102139180 A CN102139180 A CN 102139180A
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Abstract
The invention relates to a spray drying tail gas and roasting tail gas purifying treatment method of a refining catalyst device. The method comprises the following steps: introducing high-temperature high-humidity corrosive tail gas flowing out from the spray drying system and roasting system of the refining catalyst device into a quench tower, absorbing heat for cooling, quenching the tail gas from 280 DEG C to less than 80 DEG C, washing dust in the tail gas by utilizing process water, and absorbing harmful gases such as HCl, NOx and NH3 by utilizing the process water; and introducing the cooled tail gas into the lower part of an absorption tower, separating gas and liquid in the absorption tower, cooling the tail gas again, cooling until the temperature is less than 60 DEG C, and carrying out secondary washing and absorption on the harmful gases such as HCl, NOx and NH3 in the tail gas, and excavating the treated tail gas after being demisted by a demister under the action of a draught fan. The invention provides a refining catalyst spray drying tail gas and roasting tail gas purifying treatment method integrated with 'cooling, dust removal and absorption' and special equipment for the method; and the equipment is made of a non-metal material, thus the acid resistance and the alkali resistance are enhanced.
Description
Technical field
The present invention relates to the spray-drying tail gas of oil refining catalyst device and the purification treatment technology of roasting tail gas.
Background technology
The oil refining catalyst device of domestic active service is at first stage of construction, do not have to consider the tail gas clean-up unit that matches, and tail gas directly enters atmosphere.Domestic spray-drying tail gas and the roasting vent gas treatment technology of once introducing a cover oil refining catalyst device, but because the complicated component of tail gas, large-minded, temperature is high, following problem is arranged in running: chlorion is to the stainless steel equipment seriously corroded, so equipment uses 2205 good materials of resisting chloride ion penetration more; HCL, NOx and NH
3Form the crystal salt easily, easily stick to equipment or pipe surface, long easy occluding device of time or pipeline; More loaded down with trivial details in the control, in operation, bring very big inconvenience.
Summary of the invention
The objective of the invention is to have characteristic antiacid, alkali resistant, utilize H in conjunction with fiberglass equipment
2O easily absorbs HCL, NOx, NH
3Deng the operation principle of gas, spray-drying tail gas and the roasting tail gas clean-up processing method of a kind of collection " cooling, dedusting, absorption " for the oil refining catalyst of one proposed.
Another object of the present invention provides a kind of spray-drying tail gas of oil refining catalyst and the special equipment of roasting tail gas clean-up processing method.
The objective of the invention is to be achieved through the following technical solutions:
A kind of oil refining catalyst spray-drying tail gas/roasting tail gas clean-up processing method is to realize by the integral device of being made up of quench tower, absorption tower, quench tower water circulating pump, absorption tower water circulating pump and air-introduced machine.Its concrete grammar is that the high temperature that the spray drying system of oil refining catalyst device and roaster system are come out, the corrosivity tail gas of high humidity cause in the quench tower by quench tube, the a large amount of atomizing chilled water (chw) following current after the supercharging of quench tower water circulating pump that sprays with the chilling nozzle of quench tower top setting contacts, reach absorbing and cooling temperature, exhaust temperature is cooled to below 80 ℃ from 280 ℃ of chillings, dust in the tail gas is washed HCl, NOx, NH by fresh water (FW) simultaneously
3Absorbed by fresh water (FW) Deng pernicious gas; Tail gas after the cooling enters the bottom, absorption tower with fresh water (FW) after coming out in the bottom of quench tower, gas-liquid separation in the absorption tower, tail gas is sprayed downwards by the top of the chilled water (chw) self-absorption tower of process atomizing, with the tail gas counter current contacting, cooling once more, temperature is reduced to below 60 ℃, simultaneously to the HCl in the tail gas, NOx, NH
3Carry out secondary washing and absorption Deng pernicious gas, treated tail gas is by after the deflection plate demister demist at top, absorption tower, and self-absorption tower top exports emptying under the effect of air-introduced machine.
The special equipment of a kind of spray-drying tail gas of oil refining catalyst device and roasting tail gas clean-up processing method comprises the overall structure that quench tower, absorption tower, quench tower water circulating pump, absorption tower water circulating pump and air-introduced machine are formed, and it is characterized in that:
Quench tower is made up of cylindrical shell, quench tube, one-level chilling nozzle, secondary chilling nozzle, inner tube wall water-cooled endless tube, the water-cooling ring mouth of pipe, washings atomizing nozzle, quench tower cylindrical shell top is connected with quench tube, the quench tower cylindrical shell adopts Venturi tube structure, cylinder inboard wall is around being provided with the inner tube wall water-cooled endless tube and the water-cooling ring mouth of pipe, be provided with one-level chilling nozzle and secondary chilling nozzle on the top of cylindrical shell, be provided with the high pressure centrifugal hydraulic spray nozzle at the trunnion place of quench tower Venturi tube structure;
The absorption tower is made up of cylindrical shell, packing layer, demister, shower, shower water circulation port and overflow outlet, establish packing layer in the cylindrical shell, shower is equipped with on cylindrical shell top, shower places between demister and the packing layer equably along circumference, the cylindrical shell bottom connects shower water circulation port and overflow outlet respectively, in the outlet of absorber tower cylinder the deflection plate demister is housed.
Above-mentioned quench tower cylindrical shell all adopts the fiberglass processing and manufacturing, internals: one-level chilling nozzle, secondary chilling nozzle, high pressure centrifugal hydraulic spray nozzle, inner tube wall water-cooled endless tube and the water-cooling ring mouth of pipe all adopt the polytetrafluoroethylene (PTFE) material; The cylindrical shell on absorption tower is selected the fiberglass material for use, and shower, nozzle are selected polytetrafluoroethylene (PTFE) for use, and short tube that is connected with nozzle and elbow are 304 inside and outside lining teflons, and packing layer is selected polytetrafluoroethylene (PTFE) for use, or polypropylene.
The temperature of above-mentioned chilled water (chw) should not be higher than 40 ℃.
Description of drawings
Fig. 1 is a kind of oil refining catalyst spray-drying tail gas/roasting tail gas clean-up treatment technology process chart.
Fig. 2 is a kind of oil refining catalyst spray-drying tail gas/roasting tail gas clean-up treatment technology technological process block-diagram.
Fig. 3 is the quench tower structural representation.
Fig. 4 is the absorption tower structural representation.
The specific embodiment
A kind of oil refining catalyst spray-drying tail gas/roasting tail gas clean-up processing method combined process flow chart, as follows to the technology of the present invention content description:
The high temperature that comes out from the spray drying system and the roaster system of oil refining catalyst device, the corrosivity tail gas of high humidity cause in the quench tower 1 by the quench tube 7 on quench tower 1 top, contact with the one-level chilling nozzle 8 of quench tower 1 top setting and a large amount of atomizing chilled water (chw) following currents after 3 superchargings of quench tower water circulating pump of secondary chilling nozzle 9 ejections, tail gas is by absorbing and cooling temperature, chilled water (chw) not only makes the tail gas cooling, protect quench tower 1 tower wall simultaneously, prevent overtemperature; Trunnion place at the quench tower Venturi tube structure is provided with high pressure centrifugal hydraulic spray nozzle 12, the annular moisture film anti-phase that forms with high pressure centrifugal waterfog head 12 when tail gas arrives the trunnion place contacts, both reduced the temperature of tail gas, again the micro-dust of carrying secretly in the tail gas had been washed.Quench tower 1 inner exhaust gas directly contacts with chilled water (chw), and gas-liquid heat-transfer, mass transfer velocity are fast, and tail gas is cooled to below 80 ℃ from 280 ℃ of left and right sides chillings, and the dust in the tail gas is washed HCl, NOx, NH by fresh water (FW) simultaneously
3Absorbed by fresh water (FW) Deng pernicious gas; Tail gas after the cooling enters 2 bottoms, absorption tower with fresh water (FW) after coming out in the bottom of quench tower 1, carry out gas-liquid separation in absorption tower 2; With the chilled water (chw) after 4 superchargings of absorption tower water circulating pump after nozzle atomization, self-absorption tower 2 tops spray downwards, with the gas separated counter current contacting, make tail gas be washed once more, lower the temperature, temperature is reduced to below 60 ℃, treated tail gas by after the pipeline demister demist at 2 tops, absorption tower from 2 tops, absorption tower outlet emptying under the effect of air-introduced machine 5.
Quench tower 1 and absorption tower 2 are the key equipments in a kind of oil refining catalyst spray-drying tail gas/roasting tail gas clean-up treatment technology, in conjunction with the accompanying drawings 3 and accompanying drawing 4 be described below:
1, quench tower
Quench tower 1 is made up of cylindrical shell 6, quench tube 7, one-level chilling nozzle 8, secondary chilling nozzle 9, inner tube wall water-cooled endless tube 10, the water-cooling ring mouth of pipe 11, washings atomizing nozzle 12.Quench tower cylindrical shell 6 tops are connected with quench tube 7, quench tower 1 cylindrical shell 6 adopts Venturi tube structure, cylindrical shell 6 inner wall surroundings are provided with the inner tube wall water-cooled endless tube 10 and the water-cooling ring mouth of pipe 11, be provided with one-level chilling nozzle 8 and secondary chilling nozzle 9 on the top of cylindrical shell 6, be provided with high pressure centrifugal hydraulic spray nozzle 12 at the trunnion place of quench tower Venturi tube structure.
The quench tower operation principle is that the corrosivity tail gas of high temperature, high humidity enters from quench tower top, contact with the one-level chilling nozzle 8 of quench tower 1 top setting and a large amount of atomizing chilled water (chw) following current of secondary chilling nozzle 9 ejections, chilled water (chw) not only makes the tail gas cooling, simultaneously protect chilling Tata wall again, prevented overtemperature; Directly contact with chilled water (chw) at quench tower 1 inner exhaust gas, gas-liquid heat-transfer, mass transfer velocity are fast, and tail gas is cooled to below 80 ℃ from 280 ℃ of left and right sides chillings, simultaneously HCl, NOx, the NH in the tail gas
3Absorbed by fresh water (FW) Deng pernicious gas, reduced the load on absorption tower.
Quench tower cylindrical shell 6 all adopts the fiberglass processing and manufacturing, one-level chilling nozzle 8, secondary chilling nozzle 9, inner tube wall water-cooled endless tube 10, the water-cooling ring mouth of pipe 11 and washings atomizing nozzle 12 adopt the polytetrafluoroethylene (PTFE) material, have solved acidity/basic species to the equipment corrosion problem.
Utilize the water-cooling wall principle, have the inner tube wall water-cooled endless tube 10 and the water-cooling ring mouth of pipe 11 of aperture quench tower cylindrical shell 6 inner wall surrounding being provided with, in the water under high pressure access tube, both solved the defective of fiberglass cylindrical shell non-refractory, the chilled water (chw) that atomized again can fully contact chilled water (chw) with tail gas in quench tower cylindrical shell 6.
Quench tower cylindrical shell 6 adopts Venturi tube structure, utilizes the venturi acceleration principle, and tail gas can be contacted with chilled water (chw) rapidly, has increased the mutual mass transfer between the gas-liquid.
2, absorption tower
Conventional packed tower apparatus-form is adopted on absorption tower 2, its operation principle is that 2 bottoms enter from the absorption tower through the tail gas after quench tower 1 cooling and chilled water (chw), the top of the chilled water (chw) self-absorption tower 2 of process atomizing sprays downwards, with the tail gas counter current contacting, to the HCl in the tail gas, NOx, NH
3Carry out secondary washing and absorption Deng pernicious gas, reach emission request.
Contain HCl, NOx, NH in 2 tail gas discharged of absorption tower
3Deng the droplet of pernicious gas and chilled water (chw) formation, for removing these droplets in the tail gas, deflection plate demister 15 has been installed in the outlet on the absorption tower.The material of deflection plate demister 15 is selected polytetrafluoroethylene (PTFE) for use, and absorption tower 2 tail gas discharged are contained HCl, NOx, NH
3Droplet Deng pernicious gas and chilled water (chw) formation captures, and can make tail gas reach the purpose that purifies once more.
For strengthening the gas-liquid mass transfer of tail gas and absorption liquid, strengthen acidproof, the alkali resistance on absorption tower 2, absorber tower cylinder 13 is selected the fiberglass material for use, and nozzle 16 is selected polytetrafluoroethylene (PTFE) for use, short tube that is connected with nozzle and elbow are 304 inside and outside lining teflons, and packing layer 14 is selected polytetrafluoroethylene (PTFE) for use.
Chilled water (chw) adopts the sedimentation in the oil refining catalyst device to dispose of sewage, with squeezing in the quench tower 1 after 3 superchargings of quench tower water circulating pump, chilled water (chw) after dedusting, the cooling flows into 2 bottoms, absorption tower and stores, and it is recycling as the absorption liquid on absorption tower 2, the overflow pipe of unnecessary recycled quench water self-absorption tower 2 overflows, and blowdown is to sewage-treatment plant.The chilled water (chw) that flows in the absorption tower 2 is recycling by absorption tower water circulating pump 4 as absorption liquid.
For guaranteeing the reasonability of tail gas treatment process, blower fan 5 is installed after absorption tower 2, not only make system be in the negative-pressure operation state, it is excessive to have reduced tail gas, makes handling safety, and does not influence the normal operation of spray drying system and roasting system.
For effectively utilizing recycled quench water, integral body is made on quench tower 1 and absorption tower 2, the chilled water (chw) of being convenient to quench tower washing, cooling relies on deadweight to flow back in the absorption tower 2, absorption liquid as absorption tower 2, the chilled water (chw) process system of semiclosed semi-cyclic cooling/washing between quench tower 1 and absorption tower 2 by quench tower water circulating pump 3 and absorption tower water circulating pump 4 reaches the purpose of saving and effectively utilizing chilled water (chw).
Claims (4)
1. the spray-drying tail gas of an oil refining catalyst device and roasting tail gas clean-up processing method, its method is the high temperature that the spray drying system of oil refining catalyst device and roaster system are come out, the corrosivity tail gas of high humidity causes in the quench tower (1) by quench tube (7), the a large amount of atomizing chilled water (chw) following current that sprays with the nozzle of quench tower (1) top setting contacts, absorbing and cooling temperature, exhaust temperature is cooled to below 80 ℃ from 280 ℃ of chillings, be provided with high pressure centrifugal hydraulic spray nozzle (12) at the trunnion place of quench tower Venturi tube structure, when tail gas arrives the trunnion place, the annular moisture film anti-phase that forms with high pressure centrifugal waterfog head (12) contacts, dust in the tail gas is washed by fresh water (FW), HCl, NOx, NH
3Pernicious gas is absorbed by fresh water (FW); Tail gas after the cooling enters bottom, absorption tower (2) with fresh water (FW) after coming out in the bottom of quench tower (1), gas-liquid separation in absorption tower (2), the top of the chilled water (chw) self-absorption tower of process atomizing sprays downwards, with the tail gas counter current contacting, cooling once more, temperature is reduced to below 60 ℃, simultaneously to the HCl in the tail gas, NOx, NH
3Pernicious gas carries out secondary washing and absorption, and treated tail gas is by after deflection plate demister (15) demist at top, absorption tower (2), and self-absorption tower (2) top exports emptying under the effect of air-introduced machine (5).
2. the special equipment of the spray-drying tail gas of a kind of oil refining catalyst device as claimed in claim 1 and roasting tail gas clean-up processing method, comprise the overall structure that quench tower (1), absorption tower (2), quench tower water circulating pump (3), absorption tower water circulating pump (4) and air-introduced machine (5) are formed, it is characterized in that:
Quench tower (1) is by cylindrical shell (6), quench tube (7), one-level chilling nozzle (8), secondary chilling nozzle (9), inner tube wall water-cooled endless tube (10), the water-cooling ring mouth of pipe (11), washings atomizing nozzle (12) is formed, quench tower cylindrical shell (6) top is connected with quench tube (7), quench tower (1) cylindrical shell (6) adopts Venturi tube structure, cylindrical shell (6) inner wall surrounding is provided with the inner tube wall water-cooled endless tube (10) and the water-cooling ring mouth of pipe (11), be provided with one-level chilling nozzle (8) and secondary chilling nozzle (9) on the top of cylindrical shell (6), be provided with high pressure centrifugal hydraulic spray nozzle (12) at the trunnion place of quench tower Venturi tube structure;
Absorption tower (2) is made up of cylindrical shell (13), packing layer (14), demister (15), shower (16), shower water circulation port (17) and overflow outlet (18), establish packing layer (14) in the cylindrical shell (13), shower (16) is equipped with on cylindrical shell (13) top, shower (16) places between demister (15) and the packing layer (14) equably along circumference, cylindrical shell (13) bottom connects shower water circulation port (17) and overflow outlet (18) respectively, and deflection plate demister (15) is equipped with in the outlet of (2) cylindrical shell (13) on the absorption tower.
3. the special equipment of the spray-drying tail gas of a kind of oil refining catalyst device as claimed in claim 2 and roasting tail gas clean-up processing method, the cylindrical shell (6) that it is characterized in that quench tower (1) all adopts the fiberglass processing and manufacturing, and internals such as one-level chilling nozzle (8), secondary chilling nozzle (9), high pressure centrifugal hydraulic spray nozzle (12), inner tube wall water-cooled endless tube (10) and the water-cooling ring mouth of pipe (11) all adopt the polytetrafluoroethylene (PTFE) material; The cylindrical shell (13) on absorption tower (2) is selected the fiberglass material for use, shower (16), and nozzle (16) is selected polytetrafluoroethylene (PTFE) for use, and short tube that is connected with nozzle (16) and elbow are 304 inside and outside lining teflons, and packing layer (14) is selected polytetrafluoroethylene (PTFE) or polypropylene for use.
4. the spray-drying tail gas of a kind of oil refining catalyst device as claimed in claim 1 and roasting tail gas clean-up processing method is characterized in that the temperature of chilled water (chw) should not be higher than 40 ℃.
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| CN2010101070111A CN102139180A (en) | 2010-02-02 | 2010-02-02 | Refining catalyst spray drying tail gas/roasting tail gas purifying treatment method and equipment |
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| CN2010101070111A CN102139180A (en) | 2010-02-02 | 2010-02-02 | Refining catalyst spray drying tail gas/roasting tail gas purifying treatment method and equipment |
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| CN102908848A (en) * | 2012-11-01 | 2013-02-06 | 安徽淮化股份有限公司 | Quenching tower of fluidized bed methanol preparing propylene process and method for preventing catalyst from blocking pipe outlet |
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| CN104548819A (en) * | 2013-10-28 | 2015-04-29 | 中国石油化工股份有限公司 | Efficient washing device and method of catalyst in reaction gas |
| CN104941355A (en) * | 2014-03-30 | 2015-09-30 | 天津东大化工集团有限公司 | Comprehensive recovery tower for tail gas in sodium benzoate production process |
| CN105396422A (en) * | 2014-09-10 | 2016-03-16 | 中国石油化工股份有限公司 | Molecular sieve calcination tail gas treatment method |
| CN105457443B (en) * | 2014-09-10 | 2018-01-12 | 中国石油化工股份有限公司 | A kind of processing equipment of tail gas absorber and molecular sieve baking tail gases |
| CN105457443A (en) * | 2014-09-10 | 2016-04-06 | 中国石油化工股份有限公司 | Tail gas absorption tower and molecular sieve calcination tail gas treatment equipment |
| CN105403057A (en) * | 2014-09-10 | 2016-03-16 | 中国石油化工股份有限公司 | Method for treating roasting tail gas of molecular sieve |
| CN104624002B (en) * | 2014-10-08 | 2016-09-28 | 中国石油化工股份有限公司 | Waste gas processing method |
| CN104624002A (en) * | 2014-10-08 | 2015-05-20 | 中国石油化工股份有限公司 | Waste gas treatment method |
| CN104457314A (en) * | 2014-11-17 | 2015-03-25 | 迈安德集团有限公司 | Waste heat recovery system for oil pretreatment turning plate cooler |
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| CN104826456A (en) * | 2015-04-20 | 2015-08-12 | 江苏宇星工贸有限公司 | Seed crystal yellow smoke recycling device |
| CN105396399A (en) * | 2015-12-25 | 2016-03-16 | 新兴铸管股份有限公司 | Ammonium sulfate dust absorption tower |
| CN108686492A (en) * | 2017-04-12 | 2018-10-23 | 中国石油化工股份有限公司 | Flue-gas dust-removing and desulfurization tower and dust-collecting sulfur-removing method |
| CN108686491A (en) * | 2017-04-12 | 2018-10-23 | 中国石油化工股份有限公司 | A kind of flue-gas dust-removing and desulfurization tower and dust-collecting sulfur-removing method |
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| CN106904711A (en) * | 2017-04-20 | 2017-06-30 | 盐城工学院 | A kind of calcium carbonate waste water circulation recovery system and calcium carbonate circulating purification system |
| CN110736361A (en) * | 2018-07-18 | 2020-01-31 | 宝塔国际石化工程技术有限公司 | quenching tower for sulfur recovery device |
| CN110871022A (en) * | 2018-08-31 | 2020-03-10 | 中国石化工程建设有限公司 | Method for treating active coke regeneration tail gas |
| CN110215816A (en) * | 2019-04-24 | 2019-09-10 | 王英宾 | A method of inhibit PCDD/Fs low temperature to generate |
| CN110215816B (en) * | 2019-04-24 | 2020-10-09 | 王英宾 | Method for inhibiting PCDD/Fs low-temperature generation |
| CN113932243A (en) * | 2021-10-09 | 2022-01-14 | 杭州临安惠通玻璃钢有限公司 | Cooling tower of quench tower |
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Application publication date: 20110803 |