Installation of obtaining hydrocarbon propellants

 

(57) Abstract:

Usage: the invention relates to techniques for the production of ecologically pure carbon gaseous propellants. Device for producing hydrocarbon propellants contain heat and mass transfer apparatus of preliminary preparation of raw materials, coupled with the receiving node of the composition of propellants, presented in the form of a distillation column, carbon adsorbers, adsorbers for the dehydration and purification of propellants, filled with synthetic zeolites, site preparation, regeneration gas, heat exchangers and furnaces. The output from the upper part of the distillation column is connected to the input in the lower part of the carbon adsorbers. At the output of the propellants of each type of adsorbers filters are installed. At the bottom of each adsorber for the dehydration and purification of propellants placed a layer of zeolite NaA, over which is placed the CaA zeolites and NaN. Site preparation regeneration gas is made in the form of adsorbers filled with synthetic zeolites or block the production of nitrogen. 5 C.p. f-crystals, 3 ill.

The invention relates to techniques for the production of ecologically pure hydrocarbon gases, propellants, and can be used in gas, oil, Neftepererabotka is hydrogen propellants [1] contains interconnected by pipelines separator, deethanization, the column of the low-temperature fractionation, tanks for acid and alkaline washing, distillation columns, dryer and mixer.

The disadvantage of this setup are the high capital and operating costs, pollution acidic and alkaline waste air and water basin. In addition, we receive at this facility propellants have a slight odor.

Closest to the technical essence and the achieved result to the present invention is an installation for producing hydrocarbon propellants containing connected by piping the receiving node of the composition of the propellants, the adsorbers filters with zeolite (type A) for the dehydration and purification of propellants, site preparation, regeneration gas, heat exchangers and furnaces [2].

The main disadvantages of the system are:

high maintenance costs associated with obtaining individual hydrocarbons (propane, butane, ISO-butane);

not a high degree of purification (mass content of sulfur compounds is not lower than 0.0001%);

as a source of raw materials use only propane / pentane mixture.

The invention of zakluchaetsja with low content of sulfur compounds to 0,00001%, to expand the range of raw materials used, to reduce operating and capital costs for the process.

This objective is achieved in that the device for producing hydrocarbon propellants containing connected by piping the receiving node of the composition of propellants, adsorbers for the dehydration and purification of propellants placed in them by layers of zeolites, site preparation, regeneration gas, heat exchangers and furnaces, zeolites used type CaA and NaX, the installation is further provided with heat and mass transfer apparatus of preliminary preparation of raw materials, coupled with the receiving node of the composition of the propellants, and carbon adsorbers, and the receiving node of the composition of the propellants is presented in the form of a distillation column, the output from the upper part of which is connected to the input in the lower part of the carbon adsorbers. At the output of the propellants from each adsorber filters are installed. At the bottom of each adsorber for the dehydration and purification of propellants placed a layer of zeolite NaA, over which is placed the CaA zeolites and NaX.

Site preparation regeneration gas is made in the form of adsorbers filled with synthetic zeolites, or block the production of nitrogen.

Supply ustanovi as raw materials for the production of propellants any hydrocarbon mixture, containing C3+INfor example, NGL. In heat and mass transfer apparatus is the separation of light hydrocarbons (C2and partly C3), which are allocated from the top of the device. The heavier the hydrocarbon, C3+INvia the lower part of the machine are sent to the middle part of a distillation column, from the top of which if the specified receive mode hydrocarbons not as individual products, but in the form of a hydrocarbon mixture with a vapor pressure corresponding to the vapor pressure of the hydrocarbon propellants, and low moisture content and resinous substances. Then there is the connection of heat and mass transfer apparatus and distillation columns to obtain propellants allows you to extend the range of raw materials used, to reduce operating and capital costs and improve product quality.

The output connection from the upper part of the distillation column with the entrance in the lower part of the carbon adsorbers prevents rapid decontamination and prolong the service life of synthetic zeolites, placed in the adsorbers for the dehydration and purification of propellants, as well as to improve the quality of the product due to the absorption of the activated coal tar is introw at the output of carbon adsorbers allows you to clean hydrocarbon mixture from the smallest particles of coal. Installing filters at the outlet of the adsorbers for the dehydration and purification of propellants allows you to clean hydrocarbon mixture from zeolite dust. This improves the quality of the products.

Deep dehydration and fine purification of the hydrocarbon mixture is carried out in the adsorbers for the dehydration and purification of propellants, filled with layers of zeolite NaA, CaA and NaX, with the first movement of the hydrocarbon mixture is a layer of zeolite NaA, then a layer of zeolite CaA and a layer of zeolite NaX. The zeolite NaA provides deep drying of a hydrocarbon mixture, the zeolite CaA absorbs light sulfur compounds such as hydrogen sulfide, methylmercaptan, and zeolite NaX removes all mercaptans, from acid-, sulfides and disulfides. Moreover, the ratio of the layers is such that allows maximum use of the capacity of each layer of the sorbent on the extracted component. Using this combination of layers NaA, CaA, NaX allows you to manifest a new quality of the combined layer to minimize adsorbsia hydrocarbon, C3+INand this leads to increased dynamic capacity of zeolites on the extracted component, the lifetime extension of zeolites, greater and selective treatment of hydrocarbon mixtures.

Installation of obtaining hydrocarbon propellants shown in the drawing, where Fig. 1 is a schematic diagram of the installation of Fig. 2 - site preparation regeneration gas, in the case of stripped gas, Fig. 3 - site preparation regeneration gas, in the case of technical nitrogen.

The apparatus comprises a pump 1, a discharge pipe through which the heat exchanger 2 is connected with the entrance in the middle part of the heat and mass transfer apparatus 3, representing the apparatus of variable cross-section, the upper part is equipped with disastrous plates, over which the partial condenser to maintain the temperature of the top of the apparatus 3. Heating of the bottom of heat and mass transfer apparatus 3 is carried out from the furnace 4. The output of the bottom product of the heat and mass transfer apparatus 3 connected to the input in the middle part of the distillation column 5. Heat the bottom of the column 5 is the propane-butane-isobutane specified composition with vapor pressure, the corresponding vapor pressure of hydrocarbon propellants. The output from the upper part of the distillation column 5 through the heat exchanger 6 is connected to the tank 7, the output of which through the pump 8 is connected to the input in the lower part of the carbon adsorbers 9, 10, filled with activated charcoal. The output of the hydrocarbon mixture from the carbon adsorbers 9, 10 connected to the filters 11, 12 for cleaning coal dust. The output of the filters 11, 12, connected to the input in the lower part of the adsorbers for deep dehydration and fine cleaning propellants, 13, 14, 15 placed in each of the layered bottom-up synthetic zeolites NaA, CaA, NaX. The output of the hydrocarbon mixture from the adsorbers 13, 14, 15 connected in series with the filters 16, 17 coarse and filters 18, 19 fine purification of hydrocarbon propellants from zeolite dust, the output of which is connected to the pipeline of the finished product is a hydrocarbon propellant. The pipeline 20, the inlet regeneration gas to the upper part of the adsorbers 13, 14, 15, is connected to node 21 gas regeneration.

The node 21 gas regeneration, in the case of use as a regeneration gas lean gas (Fig. 2), contains the adsorbers 22, 23, filled with synthetic zeolites, recup is the amount of regeneration gas technical nitrogen (Fig. 3), contains an air compressor 26 is connected through a receiver 27 to membrane installation 28 air separation, through which the receiver 29 to enrich the nitrogen of the air, recuperative heat exchanger 24 and the furnace 25 is connected to the adsorbers 13, 14, 15.

The device operates as follows. Liquefied natural gas (C2-C5) pump 1 through the heat exchanger 2 is fed to the middle portion of heat and mass transfer apparatus 3. Gases directly derived from the partial condenser of heat and mass transfer apparatus 3 according to the pressure. The bottom product of the device 3 containing C3+INcomes to download in the middle part of the distillation column 5. The bottom product of the column 5 is cooled in the heat exchanger and is sent for further processing in the form of pentanol faction. From the top of column 5 are disposed a pair of propane-butane-isobutane mixture, which is cooled and condenses in the heat exchanger 6 and settles in the tank 7. Part of the liquefied fraction of the pump 8 is supplied to the irrigation of the column 5, and the main part of the flow of a given composition with a vapor pressure corresponding to the vapor pressure of the hydrocarbon propellants, served in one of the alternately operating carbon adsorbers 9, 10.

Passing and ceroxide carbon. The composition of the propellants through the alternately operating the filters 11, 12 from the bottom up is served in the adsorbers 13, 14, 15 layers filled with synthetic zeolites brands NaA, CaA, NaX. This combination of layers provides deep dehydration, fine purification from sulfur compounds and the deodorizing composition of the propellants. The adsorbers operate in such a way that at the stage of adsorption, regeneration and cooling are one apparatus. The obtained hydrocarbon propellant from the adsorbers 13, 14, 15 is directed to alternately operating the filters 16, 17 and 18, 19, where it is cleaned from zeolite dust and then sent to the warehouse of finished products.

Regeneration of zeolites in the adsorbers 13, 14, 15 is carried out by gas, having passed the site preparation 21. As regeneration gas and cooling use of stripped gas or nitrogen with a residual oxygen content of not more than 2% vol.

When used as regeneration gas hydrocarbon stripped gas training can be done in two alternately operating adsorbers 22, 23, filled with layers of synthetic zeolites of type A and X. the Gas adsorber passes down through the bed of adsorbent, drained, cleaned and fed into the pipeline 20 ustanovljenja. After the zeolite layer, the gas is partially heated in the regenerative heat exchanger 24 and is fed to heat in the oven 25, and further in the adsorber, switched in a cycle of regeneration. Exhaust gas after cooling, regenerative heat exchanger 24 is sent to the fuel gas line.

In the case of technical nitrogen with a residual oxygen content of not more than 2% vol., as regeneration gas and cooling installation connect as site preparation gas 21 - unit receiving nitrogen.

Membrane air separation unit 28 operates as follows. Air through the compressor 26 and receiver 27 is supplied to Multifibre membrane elements, where the separation of atmospheric air under pressure to get technical nitrogen with an oxygen content not more than 2% vol. and through the receiver 29 enters the adsorber located in the refrigerating cycle. After the zeolite layer, nitrogen is partially heated in the regenerative heat exchanger 24 and enters the furnace 25, and further in the adsorber, switched into the regeneration cycle. Exhaust nitrogen after cooling, regenerative heat exchanger 24 is reset to a candle.

1. Device for producing hydrocarbon propellents propellants placed in them by layers of zeolites, site preparation regeneration gas, heat exchangers and furnace, characterized in that the zeolite used type CaA and NaX, the installation is further provided with heat and mass transfer apparatus of preliminary preparation of raw materials, coupled with the receiving node of the composition of the propellants, and carbon adsorbers, and the receiving node of the composition of the propellants is presented in the form of a distillation column, the output from the upper part which is connected with the entrance in the lower part of the carbon adsorbers.

2. Installation under item 1, characterized in that at the output of the propellants of each type of adsorbers filters are installed.

3. Installation on PP.1 and 2, characterized in that the bottom of each adsorber for drying posted by a layer of zeolite NaA, over which is placed the CaA zeolites and NaX.

4. Installation on PP. 1 to 3, characterized in that the site preparation regeneration gas is made in the form of adsorbers filled with synthetic zeolites.

5. Installation on PP. 1 to 3, characterized in that the site preparation regeneration gas is made in the form of block receiving nitrogen.

 

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