Method for separation of waste gas or smoke produced in process of fuel oxidation, and extraction of carbon dioxide from it
FIELD: technological processes.
SUBSTANCE: invention may be used in chemical industry and environment protection. Waste gas flow is cooled, compressed by compressor and then passed through material that is half-permeable for gas, for instance, molecular sieve or activated coal. Adsorption and desorption of carbon dioxide in half-permeable material is carried out in compliance with adsorption technology at periodical change or swinging of temperature (AKT). Part of separated gas flow that contains highly concentrated carbon dioxide is used as initial material for production of ammonia and urea or methanol or is collected and stored for further use.
EFFECT: lower consumption of energy, reduced structural expenses and expenses on servicing.
5 cl, 1 dwg
The technical field to which the invention relates.
The present invention relates to a method for separation off-gas or smoke generated during the oxidation of the fuel, and excretion of carbon dioxide. The invention relates in particular to a method of carbon dioxide from exhaust gas or smoke from the air oxidation of fossil fuels or their fractions or derivatives, through its division.
The term "oxidation" in the context of the present invention is implicit and normal combustion, in particular fossil fired in the air in a domestic or industrial purposes, and electrochemical oxidation of the fuel occurring, for example, in fuel cells.
The level of technology
It is known that at present exhaust (flue) gases or smoke generated in the combustion process or in other processes of the natural oxidation (burn) of fuel in the domestic environment or in industrial plants, usually vented into the atmosphere, thereby creating serious problems associated with environmental pollution. The most serious problems associated with a global increase in the temperature of the planet, known as the "greenhouse effect", and is due primarily to the increase in the content in the Earth's atmosphere of carbon dioxide, which gets it together with rabotniki gases or smoke.
In addition, it is known that in certain industrial process carbon dioxide is used as the source of the product, including processes include, in particular, processes that use thermal energy obtained by burning fossil fuels. Obviously, in these cases, to increase productivity and/or reduce the cost of raw materials it is advisable to use carbon dioxide at least partially isolated from forming in the combustion process off-gases.
It is known, for example, that is used to produce ammonia and urea or methanol starting materials, such as hydrogen, carbon monoxide and carbon dioxide, are usually obtained in the form of a gaseous mixture in the reforming of methane or other light hydrocarbons such as natural gas, LPG (liquefied petroleum gas) and nafta.
The conversion of methane is carried out in a special oven, which is part of the whole installation reformer, usually intended to produce ammonia and urea or methanol, using the heat obtained by combustion with air in some part of the source of methane.
Upon receipt of the ammonia and urea for the conversion of hydrogen into ammonia to the resulting reforming gas mixture in stoichiometric proportions add nitrogen.
However, to icesto carbon dioxide contained in the resulting gaseous mixture is less than the stoichiometric amount required for conversion into urea just received of ammonia, which, obviously, reduces the performance of the equipment for production of urea.
And, conversely, upon receipt of the methanol, the amount of hydrogen contained in the received in the process of reforming a mixture of gases, sometimes exceeds the amount of hydrogen required for conversion to methanol entire monoxide and carbon dioxide, and therefore taken out of the synthesis reactor, the excess hydrogen is often used as fuel.
Obviously, performance and installation for obtaining urea and installation for the production of methanol can be significantly increased by allocating at least part of the carbon dioxide contained in the gaseous combustion products formed during the reforming of methane.
The problem with the separation and capture of carbon dioxide from the gaseous combustion products or smoke, is quite acute in recent decades has been the object of the most diverse and numerous studies. Most of these studies have been associated with the development of new ways to "wet" the separation of mixtures of gases and the separation from it of carbon dioxide. Offered on the basis of these research methods-wet cleaning of kazooba the different products of combustion were based on the use of appropriate solvents or solvent, able to selectively absorb carbon dioxide, followed by separation of carbon dioxide from solution or solvent by heating.
However, all currently known such methods have various disadvantages, which limit the possibility of their industrial applications.
One of the more significant disadvantages associated with the oxidation of the various components of the washing solution, which occurs under the action of oxygen contained in the gaseous products of combustion, and requires frequent replacement of the solution.
In addition, in the gaseous combustion products usually also contain sulfur and nitrogen oxides (SOxand NOx), which interact with some components of the washing solution and form stable salts and other undesirable compounds, it is difficult allocated from the solution and is recyclable.
The need for frequent replacement of the wash solution and removal and recycling of unwanted compounds produced during decomposition, respectively, increases the cost of the whole process of separation of the gaseous combustion products and the allocation of these carbon dioxide.
In addition, current equipment for the separation of gaseous combustion products and the selection of them dioxide of plastics technology : turning & the Yes is marked by a relatively high complexity, has a high cost, is time-consuming to maintain and takes up a lot of space and therefore require large investments and costs for routine maintenance.
The present invention was based on the task to develop an effective and reliable method of separating the waste gases formed during the oxidation of the fuel, and the selection of them is carbon dioxide, which would allow to reduce energy consumption, construction costs and maintenance costs.
Summary of the invention
The above problem is solved according to the invention with its proposed method of separation of the exhaust gases formed during the oxidation of the fuel, and the allocation of these carbon dioxide, in the exercise of which the flow of exhaust gas is passed through a semi-permeable to gas material, in this semi-permeable to the gas material from passing through it the waste gas stream to separate a gas stream containing highly concentrated carbon dioxide, and use at least part of the gas stream containing highly concentrated carbon dioxide as raw material in industrial plant and/or collected and stored for subsequent use, at least part of the flow gas containing highly concentrated carbon dioxide.
Polyproline the output for strip material can be selected from the group including membrane hollow fibers and materials that can adsorb predominantly carbon dioxide, such as molecular sieves.
As the membranes of the hollow fibers, you can use two types of membranes, some of which mainly pass carbon dioxide, and other mostly do not miss it.
To the "molecular sieve" refers to all conventional microporous materials that can adsorb predominantly carbon dioxide contained in the gaseous mixture including activated carbon. Depending on the specific method of adsorption and release of carbon dioxide, all such materials are separated by molecular sieve or activated carbon type AAA (in which adsorption occurs at periodic variation or fluctuation pressure) or type of ACT (in which adsorption occurs at periodic variation or temperature swing).
While adsorption on AAA-technology containing carbon dioxide gas mixture is passed through a molecular sieve under pressure, which accelerates the preferential adsorption of carbon dioxide in the micropores of the molecular sieve. Subsequent reduction of pressure occurs simultaneously desorption of carbon dioxide and other gaseous components, held together with him in the micropores of the molecular sieve, and regeneration molekulyarnoj the sieve.
When the preferential adsorption of carbon dioxide in the micropores of the molecular sieve in the ACT-technology containing carbon dioxide partial mixture of gases is passed through a molecular sieve at a temperature not exceeding 80°C. the Desorption of carbon dioxide and other gaseous components, held together with him in the micropores of the molecular sieve, and the regeneration of the molecular sieve in this case, during the subsequent rise in temperature, for example by means of steam.
In the proposed in the invention method, it is preferable to use at least a molecular sieve type ACT.
Using the proposed method, the molecular sieve type ACT eliminates the need for compression of large quantities of shared gas and allows to obtain carbon dioxide at relatively low energy cost.
In addition, for the regeneration of the molecular sieves of the type of ACT it is sufficient to pass through them in pairs or in another embodiment, the part containing highly concentrated carbon dioxide gas flow heated to a temperature of regeneration of molecular sieves.
Using the proposed method does not molecular sieves type ACT, and the membranes of the hollow fibers or molecular sieves of type AAA less preferred because of the much greater flow of energy necessary for compression treatment is atively exhaust gases.
In addition, the use of the membranes of the hollow fibers is associated with a high cost, even with a significant increase in process efficiency and the emissions of carbon dioxide from other gaseous components contained in the waste gaseous products of combustion.
In a preferred embodiment of the invention it is proposed a method of separating gases of combustion and separation from them of carbon dioxide, which as a semi-permeable to gas material use material that can adsorb predominantly carbon dioxide and highlight from the stream of exhaust gas, the gas stream containing highly concentrated carbon dioxide, and in which the flow of exhaust gas is passed through a semi-permeable to gas is a material that adsorbs at least a substantial part contained in the exhaust gas flow of carbon dioxide, to obtain the output stream of gas with a low content of carbon dioxide passed through a semi-permeable to gas, the material gas with a low content dioxide carbon released into atmosphere and desorbed from a semi-permeable to gas material, at least a substantial portion of the carbon dioxide to obtain a gas stream containing highly concentrated carbon dioxide.
More distinctive features and advantages of the STW proposed in the present invention, a method of extraction of carbon dioxide from the waste gaseous products of combustion are considered in the description below, the example illustrates, but do not limit the invention variants of its possible implementation with reference to the accompanying description of the drawing.
Brief description of drawing
Attached to the description of the drawing is a schematic diagram illustrating a possible implementation of the present invention in the method of separating the waste gaseous products of combustion and the allocation of these carbon dioxide.
The preferred embodiment of the invention
Marked as shown in the drawing the figure 1 position of the unit is a furnace, reactor or combustor of household or industrial installations, which together with air and burn the appropriate fuel, in particular natural fuel.
Marked on the diagram the position of the 2 block is a heat exchanger designed to cool the stream of hot flue gas produced during combustion of the fuel in unit 1.
In the exhaust gas contains mainly carbon dioxide, water vapor, oxygen and nitrogen, as well as a limited number of nitrogen and sulphur oxides (SOxand NOx).
The block indicated by the position 3, a compressor which compresses it to the required pressure stream is cooled in heat exchanger 2 of the exhaust gases. The presence of the compressor 3 is optional, but it should be used when you is the bookmark of carbon dioxide using molecular sieves type AAA or membranes of the hollow fibers, when the processing of the exhaust gas requires a mandatory compression.
When using molecular sieves type ACT need to use compressor 3 is eliminated and it can be replaced by a simple fan.
Position 4 marked block with a semi-permeable to gas material, in particular a membrane or molecular sieve, which separates out of the unit 2 or unit 3 flow of exhaust gas to obtain a gas flow containing highly concentrated carbon dioxide, as described in more detail below.
Position 5 marked another compressor, which compresses flowing out of the block 4, the gas stream containing highly concentrated carbon dioxide.
Part received in block 4 of the gas stream containing highly concentrated carbon dioxide, heat another heat exchanger, which is indicated in the diagram position 6.
Formed in the block 1 hot exhaust gases are fed into the heat exchanger 2 to line 7.
In the heat exchanger 2, the waste gas stream is cooled to a temperature in the range from 20 to 80°C.
The flow of the cooled gas leaves the heat exchanger 2 through the pipe 8. When used in block 4 as a semi-permeable to gas material of the membranes of the hollow fibers or molecular sieve type AAA emerging from th the exchanger through the pipeline 8 cold exhaust gas is first compressed in the compressor 3 to the absolute pressure in the range from 1 to 20 bar, and only then through the pipeline 9 is applied to the block 4.
In the case when the block 4 as a semi-permeable to gas material used molecular sieve type ACT, the need for compressor 3 is eliminated, and the flow of exhaust gases from the block 2 immediately served in the block 4.
In block 4 semi-permeable to gas the material is released from flowing through the pipeline 8 or 9 of the flow of exhaust gases from a gas stream containing highly concentrated carbon dioxide.
In unit 4, it is preferable to use a molecular sieve type ACT, which takes place mainly nitrogen and which at the same time mainly adsorbed a mixture of gaseous components containing oxygen, i.e. mainly carbon dioxide, water vapor and pure oxygen.
Pipeline, marked in item 10 of block 4 in it after processing the exhaust gases emit gas, which mainly contains nitrogen.
For desorption of carbon dioxide and other oxygen-containing compounds adsorbed in unit 4, for a time block connected to the block 4 line 8 or 9 and regenerate in unit 4 located therein membrane hollow fibers or molecular sieve.
When using a membrane of hollow fibers or molecular sieve type AAA regeneration membrane or molecular is about SITA carried out by reducing the pressure in unit 4 (decompression) and release from the membrane or molecular sieve of adsorbed carbon dioxide.
When using molecular sieve type ACT regeneration of the sieves carried out by the method described in more detail below.
The pipeline 11 from unit 4 enters obtained in the process of regeneration of the semi-permeable to gas of the material gas in which the concentration of carbon dioxide is greater than the exhaust gas in the pipe 8 or 9. In out of the unit 4 through the pipeline 11 gas concentration of other adsorbed gaseous components is also higher than in the exhaust gas in the pipe 8 or 9.
Taken from unit 4 gas containing highly concentrated carbon dioxide can be used as a starting material to the corresponding industrial setting, either directly or after further processing. In another embodiment, the gas can after its liquefaction stored in liquid form in the appropriate place and then use as needed.
Containing highly concentrated carbon dioxide gas can, for example, via the pipeline 11 to submit to the appropriate compressor 5 and after compression in the compressor to correct pressure immediately be used as source material connected to the compressor by a pipe 12 to the device for producing urea or methanol.
For full or partial purification of the current flowing through the pipeline 11 gas from such gotoblas the s components, as oxygen and oxides of nitrogen or sulfur (SOxand NOx), it can be skipped under certain conditions through one or more membranes or molecular sieves and/or process in any other system of separation.
Completely or partially purified from the above gaseous components of the gas pipeline 11 to serve in the compressor 5 and after compression to a certain pressure to use as source material for urea or methanol.
In this scheme, the part containing highly concentrated carbon dioxide gas from the pipe 11 through the pipeline 13 is heated in the block 6 and then through the pipeline 14 is returned back to the block 4, in which it is used for the regeneration of the molecular sieve type ACT.
In another embodiment, for the regeneration of such screens you can use water vapor with high temperature.
When regeneration occurs desorption of gaseous components such as carbon dioxide in the micropores of the molecular sieve type ACT, which increases the concentration of carbon dioxide in the gas stream in the pipe 11.
For the person skilled in the art it is obvious that taking into account the specific requirements can accordingly be improved offer in the invention method, while staying within the volume of the crust is asego of the invention, defined by the claims.
1. The method of separation of the exhaust gases formed during the oxidation of the fuel, and the allocation of these carbon dioxide, in the exercise of which the flow of exhaust gas is passed through a semi-permeable to gas material, which is a molecular sieve or activated carbon, and then separating the gas stream containing highly concentrated carbon dioxide, in which adsorption and desorption in a semi-permeable to gas, the material gas flow containing highly concentrated carbon dioxide, conduct technology adsorption at periodic variation or temperature swing (the ACT), and use at least part of the gas stream containing highly concentrated carbon dioxide as raw material industrial plant and/or collected and stored for later use at least part of the gas stream containing highly concentrated carbon dioxide.
2. The method according to claim 1, wherein for the separation of the exhaust gases and the allocation of these carbon dioxide as a semi-permeable to gas material use material that can adsorb predominantly carbon dioxide and highlight from the stream of exhaust gas, the gas stream containing highly concentrated carbon dioxide, and in which the flow okadama what about the gas is passed through a semi-permeable to gas material, which adsorbs at least a substantial part contained in the exhaust gas flow of carbon dioxide with receiving the gas stream with a low content of carbon dioxide passed through a semi-permeable to gas, the material gas with a low content of carbon dioxide released into atmosphere and of the semi-permeable to gas material is desorbed at least a substantial portion of the carbon dioxide to obtain a gas stream containing highly concentrated carbon dioxide.
3. The method according to claim 2, in which the desorption is conducted by passing through a semi-permeable to gas material flow of steam or by passing the gas stream containing highly concentrated carbon dioxide, heated to the regeneration temperature of a semi-permeable to gas material.
4. The method according to any of the preceding paragraphs in which the oxidizable fuel is a natural fuel.
5. The method according to any of the preceding paragraphs, in which highly concentrated carbon dioxide is used at the facility to produce ammonia and urea or methanol.
SUBSTANCE: invention refers to method of hydrogen formation from methane containing gas, specifically natural gas. Gas hydrocarbons are catalyst decomposed in reforming furnace by water steam into hydrogen, carbon oxide and carbon dioxide. Following conversion step includes catalytic conversion of formed carbon oxide into carbon dioxide and hydrogen by water steam. Carbon dioxide is outgassed from converted gas flow by scrubber. While washed and oxygen-rich hydrogen is then divided with adsorption plant into hydrogen gas product flow and exhaust gas flow. The latter together with hydrogen vented from gas flow behind scrubber, is supplied to reforming furnace and combusted there. Installation contains at least one reforming furnace with combustion chamber, conversion stage with at least one conversion reactor for catalyst carbon oxide conversion by water steam into carbon dioxide, carbon dioxide separation scrubber and connected hydrogen separation adsorption plant attached to for extraction to which back the leader is attached to gas pipeline jointing back to combustion chamber and used for reformer heating with adsorption plant exhaust gas flow. And additional scrubber exhaust gas flow portion reverser to combustion chamber of reforming furnace is provided.
EFFECT: simple and efficient hydrogen formation process with carbon dioxide trace released to atmosphere.
6 cl, 2 dwg
SUBSTANCE: described is catalyst of purification of hydrogen-containing gas mixture from CO, including metal copper and/or copper oxide and cerium dioxide, applied on carbon carrier, as such mezoporous graphite-like carbon material is used, which represents three-dimensional matrix with pore volume 0.2-1.7 cm3/g, formed with ribbon carbon layers 100-10000 A thick and curvature radius 100-10000 A, having true density equal 1.80-2.10 g/cm3, X-ray density 2.112-2.236 g/cm3, porous structure with pore distribution with additional maximum within the range 200-2000 A or biporous structure with pore distribution with additional maximum within the range 40-200 A and specific surface 50-500 m2/g, catalyst having the following composition, wt %: Cu - 5.0-10.0; Ce - 15.0-20.0; O - 4.8-7.2; C - 75.2-62.8. Also described is method of catalyst preparation by subsequent or simultaneous impregnation of said carrier with cerium and copper solutions.
EFFECT: high efficiency, selectivity and enhanced mechanical strength of catalyst.
2 cl, 1 tbl, 6 ex
FIELD: selective oxidation of carbon monoxide in hydrogen-containing stream.
SUBSTANCE: invention relates to method for selective oxidation of carbon monoxide to carbon dioxide in raw material containing hydrogen and carbon monoxide in presence of catalyst comprising platinum and iron. Catalyst may be treated with acid. Certain amount of free oxygen is blended with mixture containing hydrogen and carbon monoxide to provide second gaseous mixture having elevated ratio of oxygen/carbon monoxide. Second gaseous mixture is brought into contact with catalyst, containing substrate impregnated with platinum and iron. Carbon monoxide in the second gaseous mixture is almost fully converted to carbon dioxide, i.e. amount of carbon monoxide in product stream introduced into combustion cell is enough small and doesn't impact on catalyst operation characteristics.
EFFECT: production of hydrogen fuel for combustion cell with industrial advantages.
13 cl, 1 tbl, 4 ex
SUBSTANCE: cleaning of liquid and solid sediments from porous matrix is performed by matrix heating to (1-1.2)Tcr, where Tcr is critical temperature of the extraction agent used, in a device including throttle device 1, separator 2, compressor or pump 3, separation valve 4, adsorbing extractor 5, with further processing by extraction agent at pressure of (1-10)Pcr, where Pcr is critical pressure of the extraction agent used. Valves 6-9 are installed additionally between adsorbing extractor and throttle device and between compressor or pump and adsorbing extractor, if Tcr is equal to melting point of solid sediments in matrix. Extraction agent flow is directed downflow at Re≤20 and upflow at Re>20.
EFFECT: reduced time of cleaning liquid and solid sediments from matrix at lower power consumption and matrix cleaning in fine dispersion form.
2 cl, 1 dwg
FIELD: technological processes.
SUBSTANCE: invention concerns environmental protection, particularly adsorbent of compound action suitable for obtaining filtering material for both fine sewage purification and complex treatment of exhausted mineral oil. Adsorbent of compound action is obtained by mixing thermal power plant burnout with mineral sediment based on iron oxide-hydroxide extracted at ground water deferrisation plants, and undergoes thermal processing within 180-350°C interval for 3-6 hours. After oil treatment the adsorbent is recovered by heating at 300-350°C for 4-5 hours.
EFFECT: obtaining adsorbent of compound action suitable for both sewage treatment and complex treatment of exhausted mineral oils, from waste.
3 cl, 6 ex, 2 tbl
FIELD: technological processes.
SUBSTANCE: invention concerns gas drying and method circulation gas drying In the process of catalytic reforming involving gas contact to solid sorbent and sorbent recovery in heated gas flow, where drying of hydrogen-containing reforming gas or of reforming catalyst recovery gas is performed with solid sorbent containing porous matrix with bulk specific gravity not less than 0.65 g/cm3, total pore volume not less than 0.55 cm3/g, average pore diametre of 7-12 nm. Aluminium oxide, silicoaluminate or carbon material is used as a porous matrix and coated with anhydrous calcium chloride in amount of up to 20 wt % of the total sorbent contents. Sorbent regeneration is performed at 80-150°C.
EFFECT: enhanced efficiency of circulation gas drying in the process of catalytic reforming both at reforming catalyst launching and operation stages and on catalyst recovery stages.
1 tbl, 6 ex
SUBSTANCE: method of modification of adsorbents with the laminar structure proposed. It is obtained by adsorption and desorbtion of the adsorbtive on them in static or dynamic conditions, according to which adsorption is conducted at supercritical parameters of the adsorbtive at the temperatures of 370-450°K and pressure of 100-130 MPa till the moment of an equilibrium, the subsequent desorbtion is carried out by depressurisation to the level of the surrounding atmosphere and by decreasing the temperature to room temperature, and as the adsorbtive inert gases - Ar, Kr, Xe, and also N2, CH4 is used.
EFFECT: increase in the sorption capacities of adsorbents and simplification of the process.
2 cl, 4 ex, 5 dwg
SUBSTANCE: invention describes a method of sorption and desorption of organic compound vapours with a sorbent affected by electromagnetic emission, where the sorbent is a fullerene-containing material, and at the sorption stage visible light of 400-600 nm wavelength or ultraviolet of 300-400 nm wavelength is used. Desorption is conducted under the influence of infrared light with wavelength of 610-700 nm, or by cutting emission off.
EFFECT: streamlining of the process, improved efficiency.
6 cl, 4 tbl, 3 ex, 2 dwg
FIELD: technological processes, filters.
SUBSTANCE: invention is intended for provision of optimal operation of filter-sorbents for water cleaning. Device for cleaning, modification and regeneration of sorbents includes the following components: bath for sorbents flushing with water solutions of acids, alkalis, salts, device for sorbents washing with specified water solutions, and also closed circuit, in which there is pump for pumping of specified water solutions from bath into separate vessel with sorbents. Bath is made as electroconductive and is kept in electrical insulating protective jacket, at that bottom and side walls of bath serve as the first electrode. Device also contains the following components: device for dosing supply of salts into bath, grounded vessel, which is made as electroconductive and installed in bath in the centre of its symmetry and has properties of water fine cleaning filter, and also the second electrode, which is installed in the specified vessel. In separate vessel for placement of cleaned sorbents in it electrodes are installed that separate sorbents in layers, which are parallel to the flow of water solutions. Electrodes are made with the possibility of energising with direct current voltage that is necessary for creation of electrical field with intensity of 100 - 10,000 V/m in bath and vessel. Device also contains additional vessel for discharge of solutions of acids, alkalis, salts in it after sorbents cleaning. Invention allows to reduce time of sorbents cleaning, modification and regeneration processes, and also to reduce consumption of initial ingredients and reduce concentration of salts in sewage water.
EFFECT: reduction of water cleaning time, reduction of initial ingredients consumption and reduction of salts concentration in sewage water.
1 dwg, 1 ex
FIELD: production of hydrogen-containing gas suitable for supply of low-temperature fuel cells in self-contained small-sized electric generators.
SUBSTANCE: hydrogen-containing gas is produced on fixed layer containing the mixture of catalyst of steam conversion of hydrocarbons and regenerated carbon dioxide absorbent including the following stages performed in cyclic succession: A) reaction of steam conversion by passing the gaseous mixture of hydrocarbons and steam through said layer; B) regeneration of carbon dioxide absorbent by passing the regenerating agent through the said layer in direction opposite to direction of delivery of reagents at stage (A). At stage (A), said layer has area at temperature above 700C and area at temperature from 550C to 700C which are so located that reagent are first brought in contact with hotter area of layer and then which area of lower temperature. Regeneration of carbon dioxide absorbent used in production of hydrogen-containing gas is performed by passing the gaseous regenerating agent at content of oxygen no less than 5 vol-% through the said layer. Simultaneously, hydrogen-containing gas at content of hydrogen no less than 40 vol-% is introduced into various areas of the said layer; hydrogen-containing gas goes into exothermic reaction with oxygen of regenerating agent, thus generating the heat for regeneration of absorbent. Proposed method makes it possible to produce hydrogen from hydrocarbon fuel of purity of 98% at content of CO and CO2 lesser than 100 ppm.
EFFECT: facilitated procedure; enhanced efficiency.
8 dwg, 1 ex
FIELD: alcoholic beverage industry; food industry; other industries; methods and devices for regeneration of the active charcoal.
SUBSTANCE: the invention is pertaining to the process engineering exploiting the adsorption properties of the active charcoals and may be used for regeneration of the active charcoals after the definite operational cycles at purification of the alcoholic beverage products, the potable water and the waste waters. The active charcoal is heated up to (1-1.2) Tcr and treated with the extractant at the pressure of (1-5) Рcr , whereТcr andРcr - the critical temperature and pressure of the used extractant respectively. At that the direction of the extractant flow is set descending at Re≤20 and - ascending - at Re>20. Regeneration is carried out in the system containing the throttling device, the separator, the compressor or the pump, the withdrawal valve, the adsorber-extractor, which upper end is connected to the inlet of the throttling device, which outlet is connected to the inlet of the separator. The upper outlet of the separator is connected to the inlet of the compressor or the pump. The lower outlet of the compressor is connected to the withdrawal valve. The outlet of the compressor or the pump is connected to the lower end of the adsorber-extractor. In addition between the adsorber-extractor and the throttling device and between the compressor or the pump and the adsorber-extractor there are the installed valves. At that the upper end of the adsorber-extractor through the valve is connected to the outlet of the compressor or the pump and the lower end of the adsorber-extractor through the valve is connected to the inlet of the throttling device. The technical result of the invention is the reduced time of the regeneration of the active charcoal with simultaneous reduction of the power input, the possibility of regeneration of the finely dispersed charcoal and its multiuse.
EFFECT: the invention ensures the reduced time of the regeneration of the active charcoal with simultaneous reduction of the power input, the possibility of regeneration of the finely dispersed charcoal and its multiuse.
2 cl, 1 dwg, 2 tbl, 5 ex
FIELD: sugar industry; production of devices for regeneration of the active granulated charcoal.
SUBSTANCE: the invention is pertaining to the field of sugar industry, in particular, to the device for regeneration of the active granulated charcoal used for purification of the sugar-containing solutions, which consists of: the hopper; the movable and motionless electrodes arranged one inside another with formation of the regeneration area; the tool for the gas withdrawal from the regeneration area and the tool for the unloading еру regenerated charcoal. The tool for withdrawal of the gas from the regeneration area represents the chamber arranged in the lower part of the hopper separated from the cavity of the hopper and the regeneration area by the partition with holes, above which there is the guiding overhang. At that the partition is located with the clearance concerning the motionless electrode for the gases passage and under the electrodes there is the mean for the regenerated charcoal aging and removal of the tail gases consisting of the chamber and the located inside it with formation of the annular clearance perforated tube for the charcoal. The mean for the regenerated charcoal aging consists of the chamber of the rectangular cross section heated from the outer sides by the electrical heaters and containing the channels formed by the inclined plates and one of the camera walls for withdrawal of the gaseous combustion products. The device ensures the increased efficiency of the regeneration process.
EFFECT: the invention ensures the increased efficiency of the regeneration process.
FIELD: petroleum processing and petrochemistry.
SUBSTANCE: process comprises multistep compression of hydrocarbon feedstock pyrolysis gas, separation of water and liquid pyrolysis products, purification and drying of pyrolysis products, sorption drying of liquefied pyrolysis products formed in final pyrolysis, and multistep rectification. Sorption drying of liquefied pyrolysis products is carried out on porous solid sorbent comprising anhydrous calcium chloride, in particular 15-30% CaCl2, 70-85% Al2O3 or 15-30% CaCl2, 50-70% Al2O3, 15-20% SiO2, having loose density at least 0.6 g/cm3 and pore volume at least 0.5 cm3/g at temperature not higher than 40°C and excess pressure 1.9-4.0 MPa. Regeneration of sorbent is effected in flowing gas atmosphere containing at least 80 vol % methane, while cramping temperature to 150°C.
EFFECT: increased economical efficiency of separation allowing longer drying phases and enabling regeneration under milder conditions.
1 dwg, 3 ex
FIELD: technological processes.
SUBSTANCE: invention concerns chemical technology, particularly sorbent production for elimination of oil products from industrial sewage, and can be applied in power engineering, metallurgy, chemical technology, mining and other industrial fields. Method of obtaining carbon sorbent involves brown coal grinding into 0.5-5 mm fraction, heating to 150-300°C, maturing at this temperature for 2-5 hours with continuous withdrawal of gases exuded during heating, and cooling down.
EFFECT: reduced power input for obtaining carbon sorbent with high sorption properties.