CN102553380B - Cyclone trapping method and device for chlorides in continuous reforming process gas - Google Patents
Cyclone trapping method and device for chlorides in continuous reforming process gas Download PDFInfo
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- CN102553380B CN102553380B CN2011104253104A CN201110425310A CN102553380B CN 102553380 B CN102553380 B CN 102553380B CN 2011104253104 A CN2011104253104 A CN 2011104253104A CN 201110425310 A CN201110425310 A CN 201110425310A CN 102553380 B CN102553380 B CN 102553380B
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Abstract
The invention discloses a cyclone trapping method for chlorides in continuous reforming process gases and a device for implementing the method. The process gas dechlorination device and the method are characterized in that the resolution efficiency is high, the pressure loss is reduced, the operation is easy and convenient, the service life is prolonged, and the device has a simple structure and is easy to implement. The invention adopts the technical scheme as follows: the device comprises a cooler, a gas liquid separation tank, a pressure booster and a dechlorination tank; the gas liquid separation tank is connected with a hydrogen gas cyclone trash remover through the pressure booster; the hydrogen gas cyclone trash remover is connected with the dechlorination tank; and the method comprises the steps of gas liquid separation, heavy polymer removal and dechlorination.
Description
Technical field
The invention belongs to the chemical industry environmental protection technical field, be specifically related to a kind of device that the continuous reformer process gas is removed muriatic method and implemented the method for processing.
Background technology
Generally do not contain chloride in the crude oil, still, in recent years Oilfield using the chemical treatment means improve recovery ratio, wherein, the employing that has chloride, cause in the crude oil chlorinity to raise, this part chlorine mainly concentrates in the naphtha cut in crude oil, causes chloride content increase in the naphtha.
Chloride in the naphtha has very important impact to the CONTINUOUS REFORMER process.Chlorinity is too low, can cause growing up and the decline of acid function of catalyst crystal grain, affects performance and the life-span of catalyst; And chlorinity is too high, and the acid function of catalyst is too strong, can cause the cracking of catalyst and carbon deposit function too strong, affects the selective and life-span of catalyst.Therefore, in the CONTINUOUS REFORMER process, must control the chlorinity in the catalytic reforming feedstock.
Chlorinity in the raw material is too high, or water content is too high and then to cause annotating chlorine dose too high in the raw material, can cause that all pre-hydrogenation and downstream stop up corrosion with hydrogen production device equipment, as when installing the high raw material of processing nitrogen content, can generate ammonium chloride, thus clog downstream compressor and pipeline etc., and impact is normally produced.
For avoiding chloride to the harm of equipment corrosion and the catalyst of pre-hydrogenation and downstream unit, need carry out dechlorination and process.
Yet, in the process of dechlorination, in dechlorination tank and attached pipeline thereof, but found a kind of heavy polymers.The content of this material is not very high, and can not be found in daily sample analysis, but really exists, and has a strong impact on the activity of antichlor in the dechlorination tank, has lowered dechlorination efficiency.Therefore, must enter between the dechlorination tank at process gas, it is removed out from process gas, avoid affecting the activity of follow-up antichlor.
Solve process gas and carry the problem of heavy polymers secretly, belong to gas-liquid two-phase and separate, the gas-liquid two-phase separating technology selected coalescer to remove in the past.But the long-term operation time of the domestic and international supplier technical protocol assurance of coalescer only is 1 year at present, can not satisfy the requirement of repairing in 3 years of China Petroleum Chemicals Corporation's guiding.If promissory warranty service cycle is 3 years, then the coalescer increasing diameter must be added to the diameter of reactor, cost is high, and floor space is large; Coalescer must dispose bypath system, and this does not meet the universal design standard of high-pressure system yet; And there is no at present the physical property that method is judged the heavy polymers in the process gas, coalescer also can't be estimated the treatment effect of this material.
In a word, because the problems referred to above that prior art exists so not yet solve up to now the chlorinity problem, can not satisfy the expectation of the clean manufacture of petrochemical industry.Therefore this area is in the urgent need to development cost low and effective chloride, moisture, the processing method and the device that contain hydrocarbon liquid phase.
Summary of the invention
Technical problem to be solved by this invention is, the corrosion difficult problem that the chlorine element of carrying secretly in the process gas and compound thereof bring to downstream unit equipment, and method and the device of a kind of small investment, energy consumption is low, chlorine removal rate is high process gas dechlorination are provided.
Such in order to address the above problem technical scheme of the present invention:
Muriatic eddy flow capturing device in a kind of continuous reforming process gas, comprise cooler, knockout drum, supercharger and dechlorination tank, described knockout drum also connects a hydrogen eddy flow trash separator by supercharger, and described hydrogen eddy flow trash separator links to each other with the dechlorination tank again.
Described hydrogen eddy flow trash separator is combined by some eddy flow core pipes, and concrete core pipe quantity is determined by the amount of the process gas that hydrogen eddy flow trash separator need be processed.
Described hydrogen eddy flow trash separator is static equipment, and cycle of oparation is 3 years, and service life of equipment is not less than 20 years.
Under the specified standards state, the rated pressure between the import of described hydrogen eddy flow trash separator and the outlet is fallen and is not more than the 30mm water column.
The nozzle of described dechlorination tank is positioned at the top of dechlorination tank, and antichlor sprays from top to bottom.
In the process gas dechlorination apparatus, antichlor produces the droplet of 10-50 micron after via nozzle, and muriatic absorptivity in the process gas is reached more than 99%.
Muriatic eddy flow capture method in the continuous reforming process gas may further comprise the steps:
1〉gas-liquid separation:
Process gas enters knockout drum behind subcooler, tentatively remove the part drop in the process gas, and the drop component of generation is regularly discharged tank body;
2〉remove heavy polymers:
The process gas of remove portion drop enters hydrogen eddy flow trash separator through supercharger, under the effect of centrifugal force, further remove heavy polymers and drop in the process gas, the heavy polymers of generation and drop converge in the bottom of hydrogen eddy flow trash separator, regularly discharge;
3〉dechlorination:
Gas enters the dechlorination tank subsequently, and the antichlor that utilizes the nozzle ejection in the dechlorination tank to go out is sloughed the chloride in the process gas.
Step 1〉described in the temperature of process gas be 10-80 ℃, absolute pressure is 0.05-5MPa.
After the chloride that the import process gas is carried secretly was removed, content of Cl element was almost nil in the process gas, and instrument does not measure the existence of chlorine element.
The chloride that the import process gas is carried secretly is not particularly limited, generally at 3-20ppm.
Liquid content is 30-100ppm in the import process gas.
The inventive method is utilized the quiet separation equipment of hydrogen eddy flow trash separator, the heavy polymers that removing process gas is entrained, avoid answering the existence of heavy polymers and caused the activity decline of antichlor in the dechlorination tank, also avoided the downstream to stop up corrosion with hydrogen production device equipment simultaneously.Significantly change or heavy polymers content when sharply increasing at process gas flow, all can steady running.
Nucleus equipment hydrogen eddy flow trash separator mainly relies on the density contrast between continuous phase-process gas and decentralized photo-heavy polymers drop, utilizes the centrifugal force of High Rotation Speed that heavy polymers is separated from process gas.
Beneficial effect: 1) differentiate the efficient height: the separation accuracy of drop and heavy polymers is 3 μ m, and 5 μ m and above drop removal efficiency surpass 90%; 2) pressure loss is little: under the specified standards state, the rated pressure between the trash separator import of hydrogen eddy flow and the clean gas outlet is fallen and is not more than the 30mm water column; 3) easy and simple to handle: need not repeatedly to wash, without any generation of waste materials, easy care, operating cost is low; 4) long service life: cycle of oparation is 3 years, and service life of equipment is not less than 20 years; 5) apparatus structure is simple, is easy to realize.
Description of drawings
Describe the present invention in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is process gas dechlorination process chart of the present invention;
Fig. 2 is simplification process gas dechlorination process chart of the present invention;
Fig. 3 is the process gas dechlorination process flow chart of prior art;
Wherein, 1 is cooler, and 2 is knockout drum, and 3 is supercharger, and 4 is hydrogen eddy flow trash separator, and 5 are the dechlorination tank, and 6 is nozzle.
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Such as Fig. 1, among the figure in this continuous reforming process gas muriatic eddy flow capturing device comprise cooler 1, knockout drum 2, supercharger 3 and dechlorination tank 5, knockout drum 2 also connects a hydrogen eddy flow trash separator 4 by supercharger 3, and hydrogen eddy flow trash separator 4 links to each other with dechlorination tank 5 again; Wherein, hydrogen eddy flow trash separator 4 is static equipment, and cycle of oparation is 3 years; Rated pressure between the import of hydrogen eddy flow trash separator 4 and the outlet is fallen and is not more than the 30mm water column; The nozzle 6 of dechlorination tank 5 is positioned at the top of dechlorination tank 5, and antichlor sprays from top to bottom, can fully mix with process gas from bottom to top, absorbs chloride wherein; The antichlor of while by nozzle 6 ejections of dechlorination tank 5 is the droplet of 10-50 micron, can arrive more than 99% the muriatic absorptivity in the process gas.
Embodiment 1:
Certain petroleum chemical enterprise's continuous reformer dechlorination system.
Fluid properties is as follows:
The recycle hydrogen flow is 24000Nm
3/ h, temperature is 15-60 ℃, and pressure is 2.0 ± 0.2MPa (G), and the import hydrogen chloride content is 3-8ppm.
Wherein, the HCI, the H that contain trace in the gas
2S, content is about 5ppm.In addition, the polymer that contains the chlorine element that also contains other trace in the gas.
Embodiment:
Such as Fig. 1, present embodiment adopts the mode of knockout drum 2, hydrogen eddy flow trash separator 4 and 5 series connection of dechlorination tank, drop in the removing process gas, heavy polymers and chloride namely add a hydrogen eddy flow trash separator 4 in the middle of the knockout drum 2 of former dechlorination flow process as shown in Figure 3, dechlorination tank 5.At first, the process gas mixture of water entrainment, hydrocarbon, heavy polymers and hydrogen chloride enters knockout drum 2, water and hydrocarbon component in the preliminary removing process gas, and regularly discharge tank body; Process gas enters hydrogen eddy flow trash separator 4 afterwards, under the effect of centrifugal force, and the heavy polymers in the further removing process gas, heavy polymers converges in the bottom of hydrogen eddy flow trash separator 4, regularly discharges; The last process gas component enters dechlorination tank 5, utilizes the chloride in the antichlor removing process gas in dechlorination tank 5.
Implementation result:
1) under the effect of static equipment-hydrogen eddy flow trash separator 4, heavy polymers and drop separation precision are 3 microns, and common 5 microns and above drop removal efficiency surpass 90%;
2) under the specified standards state, the rated pressure between the outlet of the import of hydrogen eddy flow trash separator 4 and the purified gas that obtains is fallen and is not more than the 30mm water column.
Embodiment 2:
Such as Fig. 2, device of the present invention to be simplified, present embodiment adopts the mode of hydrogen eddy flow trash separator 4,5 series connection of dechlorination tank, the drop in the removing process gas, heavy polymers and chloride.The process gas mixture of entrained drip, heavy polymers, hydrogen chloride is behind cooler 1 among the figure, enter hydrogen eddy flow trash separator 4, under the effect of centrifugal force, drop in the removing process gas and heavy polymers, drop and heavy polymers converge in the bottom of hydrogen eddy flow trash separator 4, regularly discharge the eddy flow trash separator; In dechlorination tank 5, utilize subsequently the chloride in the antichlor removing process gas.Liquid content is 30-100ppm in import department's process gas, can use as shown in Figure 2 device when droplet content in the process gas is not too high.
More than show and described basic principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (7)
1. muriatic eddy flow capturing device in the continuous reforming process gas, comprise cooler, knockout drum, supercharger and dechlorination tank, it is characterized in that described knockout drum also connects a hydrogen eddy flow trash separator by supercharger, described hydrogen eddy flow trash separator links to each other with the dechlorination tank again.
2. muriatic eddy flow capturing device in a kind of continuous reforming process gas according to claim 1 is characterized in that, the amount of the process gas that the core pipe quantity in the described hydrogen eddy flow trash separator can be processed according to need is adjusted.
3. muriatic eddy flow capturing device in a kind of continuous reforming process gas according to claim 1 is characterized in that, described hydrogen eddy flow trash separator is static equipment, and cycle of oparation is 3 years.
4. muriatic eddy flow capturing device in a kind of continuous reforming process gas according to claim 1 is characterized in that, the rated pressure between the import of described hydrogen eddy flow trash separator and the outlet is fallen and is not more than the 30mm water column.
5. muriatic eddy flow capturing device in a kind of continuous reforming process gas according to claim 1 is characterized in that the nozzle of described dechlorination tank is positioned at the top of dechlorination tank, and antichlor sprays from top to bottom.
6. muriatic eddy flow capture method in the continuous reforming process gas is characterized in that, may further comprise the steps:
1〉gas-liquid separation:
Process gas enters knockout drum behind subcooler, tentatively remove the part drop in the process gas, and the drop component of generation is regularly discharged tank body;
2〉remove heavy polymers:
The process gas of remove portion drop enters hydrogen eddy flow trash separator through supercharger, under the effect of centrifugal force, further remove heavy polymers and drop in the process gas, the heavy polymers of generation and drop converge in the bottom of hydrogen eddy flow trash separator, regularly discharge;
3〉dechlorination:
Gas enters the dechlorination tank subsequently, and the antichlor that utilizes the nozzle ejection in the dechlorination tank to go out is sloughed the chloride in the process gas.
7. muriatic eddy flow capture method in the continuous reforming process gas according to claim 6 is characterized in that step 1〉described in the temperature of process gas be 10-80 ℃, absolute pressure is 0.05-5MPa.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101113126A (en) * | 2006-07-26 | 2008-01-30 | 李莉 | Olefin-containing lighter hydrocarbons catalytic hydrogenation method |
| CN101721861A (en) * | 2009-12-18 | 2010-06-09 | 上海华畅环保设备发展有限公司 | Method and device for desulphurization of recycle hydrogen |
| CN201952226U (en) * | 2010-12-20 | 2011-08-31 | 大连欧科膜技术工程有限公司 | Low-concentration hydrogen recovery device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101113126A (en) * | 2006-07-26 | 2008-01-30 | 李莉 | Olefin-containing lighter hydrocarbons catalytic hydrogenation method |
| CN101721861A (en) * | 2009-12-18 | 2010-06-09 | 上海华畅环保设备发展有限公司 | Method and device for desulphurization of recycle hydrogen |
| CN201952226U (en) * | 2010-12-20 | 2011-08-31 | 大连欧科膜技术工程有限公司 | Low-concentration hydrogen recovery device |
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