Method and apparatus for producing acetylene and synthetic gas through fast mixture of reagents

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing acetylene and synthetic gas via thermal partial oxidation of hydrocarbons which are gaseous at temperatures used for preheating, in a reactor which is fitted with a burner with through holes, characterised by that the starting substances to be converted are quickly and completely mixed only directly in front of the flame reaction zone in through holes of the burner, where in the mixing zone within the through holes the average flow rate is higher than the propagation speed of the flame under the existing reaction conditions. The invention also relates to a device for realising the said method.

EFFECT: possibility of avoiding preliminary and reverse inflammations.

9 cl, 3 ex, 1 dwg

 

The proposed invention relates to an improved method of producing acetylene and synthesis gas by partial thermal oxidation in the reactor, which has a burner with through holes, and device for implementing proposed according to the invention method.

Combination mixer/burner/combustion chamber/tushilnik used, typically, in the method of producing acetylene BASF-Sachsse-Bartholomé, next, if they refer to the combination, simply referred to as "reactor"which describe, for example, in German patent DE-PS 875198.

Acetylene torches, currently used on an industrial scale, differ in their cylindrical geometry of combustion chamber (reactor). Source materials are pre-mixed in the diffuser and largely free from back-mixing is introduced into the burner unit, which preferably has a hexagonal spaced through holes. In the embodiment, for example, 127 holes with an inner diameter of 27 mm hexagonal located on the generally circular cross section with a diameter of about 500 mm is Connected combustion chamber, which stabilizes the flame reaction of partial oxidation of acetylene, also of cylindrical cross section and corresponds in appearance to the short pipe (for example, the diameter of 533 mm, length 400 is m). All the burner from the burner unit and the furnace chamber is hung from the top through the flange into the container for extinguishing a larger cross-section. At the height of the output plane of the combustion chamber outside of the volume set nozzle to extinguish one or more distribution rings to extinguish that spray extinguishing medium, for example water or oil, with or without the aid environment to atomize and inject approximately vertically to the direction of the main stream leaving the combustion chamber of the reaction gases. The purpose of such direct quenching is extremely rapid cooling of the reacting flow in order consecutive reactions, particularly the decomposition of the formed acetylene, was suppressed (frozen). Moreover, the range and distribution of the extinguishing flows perfectly change so that was achieved, if possible, a homogeneous temperature distribution, if possible, in a shorter time.

As in the method of producing acetylene BASF-Sachsse-Bartholomé and similar methods of thermal partial oxidation of the original substances (hydrocarbons or oxygen) is heated and stirred as a result there is a danger of pre-ignition reverse ignition as a result, temporarily, the limited thermal stability of the mixtures. the following consequences are usually known you can get downtime and torches with dangers emissions, especially in the higher parts of the reactive components of the original substances, such as hydrogen or liquid gas (LPG). However, preferably the use of these components of the original substances, as they may contribute to increases in output and/or performance.

When carrying out the known methods are pre-mixing starting materials in the mixing cone in relatively large volumes and at high temperatures. In the high part of the reactive components of the original substances, the catalytically active particles and surfaces, such as rust, coke, etc., a large allocation of time, for example, through reverse zone mixing and points full braking flows may occur that violated the induction time for ignition of the mixture, resulting in worsening of the efficiency and effectiveness of the method. Next appears as barely possible, additional input devices, such as, for example, stirring the burner, as given together with the resulting violations of threads, as well as violations to the time of induction of concern is the ignition of the mixture.

Thus, the goal to develop an improved method for obtaining acetylene and synthesis gas, which is about to avoid these disadvantages and which further provides a higher temperature for pre-heating and the use of higher pressures. This method should be easy and economical to implement, and should be carried out using existing conventional burners.

In accordance with the foregoing, found a method of producing acetylene and synthesis gas by partial thermal oxidation in the reactor, which has a burner with through-holes, which differs in that the transform of the original substance is rapidly and completely mixed only immediately before the flame reaction zone in the through-holes of the burner, and in the mixing zone within the through-holes set average flow velocities that exceed the speed of flame propagation under suitable reaction conditions. Then found the device for carrying out proposed according to the invention method.

According to the invention can avoid these unwanted pre-and reverse firings by premixing the original substances are not as up to date in large quantities (in the mixing cone under low flow rates, and pre-mixing is preferably transferred into a typical existing large number of holes of the burner unit ("ported"). In General the task of the through-holes is locally defined on the time to stabilize the flame. Thanks proposed according to the invention improvements mixture is divided into many small volumes and in through holes formed directed forward current, which has a high speed. Are there high-turbulence flow by a suitable geometry of the mixing quickly and easily receive the mixture, and simultaneously avoid overshoot of the flame due to the much higher compared to the flame velocity of the flow velocity in the through-holes. The development of the geometry of the mixing specialist in this area can easily be adjusted to the present invention. Well suited for this purpose are, for example, a mixing nozzle, which operate on the Venturi principle or the principle of static mixing tube. The division of tasks pre-mixing when the usual methods of scaling for acetylene acetylene burners and reactors also provides a simple applicability and suitability.

Burners in the way BASF-Sachsse-Bartholomé are usually water-cooled cylinder blocks, which have a large number of cylinder holes. On the basis of the thus arising barrier supported the stabilization of the flame so that combustion space above the burner plate is formed perfectly flat flame. Moreover, the number of holes, and Takua diameter and spacing for a given capacity of the burner is chosen so that the flow velocity in the holes is higher than the return impact of the flame, but below the critical speed of the blow.

According to the invention a mixture of original substances occurs only immediately before the flame reaction zone in the through-holes of the burner, and not as far in the diffuser. The amount of burners used in industrial scale, is, for example, 0.6 m3, while the amount proposed according to the invention the mixing element by approximately 3 orders of magnitude less.

Thus, the residence time in the mixing element is reduced to 0,001-0,005 seconds, while it is in the normal mixture through a separate diffuser is 0.1-0.3 seconds. However, you can pre-mix the reaction mixture, in which the time lag of the ignition is in milliseconds. The mixing element differs substantially free from back-mixing and rapid mixing of both original substances while minimizing appearing at this pressure loss. Due to an appropriate design it is also possible to use an initial pressure of one of the two starting substances for entrainment and mixing on the principle of static mixing tube.

Especially simply and preferably a device DL is holding proposed according to the invention method, could be done by additional supply of existing burners intermediate flange for separate input substances. However, one of the two original substances enter through the old diffuser for pre-mixing, while the respectively other through the intermediate flange is distributed across the individual mixing elements. One of the two original substances is at high pressure, the input of this substance may be carried out through the cross-flow. If the two original substances are almost equal to the initial pressure, they are higher initial pressure, preferably through a conventional diffuser for pre-mixing, so that the mixing tube operates on the principle of a static mixer. The function of the mixing pipe undertake through holes already present unit the burner, so that it remains slightly adapted in its function. In both cases, the implementation by usovershenstvovany downtime, torches and associated emissions and opportunities to use or recycling of raw synthesis gas, (raw)is hydrogen or a higher part (>10 vol.%) ethane, ethylene or liquefied gases (propane, butane etc), to improve high temperature for pre-heating at 600°C, the pressure of the reactor to more than 1.3 bar, otherwise, there would have been cause for ignition timing. However, the existing methods can be implemented or increased output, or productivity. For recirculation of hydrogen or hydrogen-containing crude synthesis gases, which are formed as by-products and composite products all carried out on an industrial scale methods of production of acetylene, the advantage is their preferred oxidation due to higher reactivity of hydrogen relatively often typical source of substance - methane (from natural gas). However, in the method of partial oxidation releasing the heat of the oxidation reaction controls unsuitable as a precursor acetylene, hydrogen and protects sources of carbon for the formation of acetylene, that is used hydrocarbon. The path leading to the formation of acetylene is most likely due to pyrolytic and uses the reaction of cracking of used hydrocarbons, which are induced by this release of heat in situ.

Proposed according to the invention the device is explained in more detail using the drawing. The drawing shows a burner (1), in which through line (2) to introduce the original substance. Through part of the device (3)used with an intermediate flange, through line (4) fail the second shoddiest. Both the original substance is mixed with inaccurately represented stirrer (5) in the walk-through holes (6) burners directly before entering into the combustion chamber (7).

The invention can be applied to all methods for producing acetylene by partial oxidation, however, especially for the method of producing acetylene BASF and its various embodiments. Also especially preferred is the combination with the methods described in the German patent applications DE 10313527 A1, DE 10313528 A1, DE 10313529 A1, and link to them.

The invention is particularly different from the ways in which the premixing takes place in the space of the reactor, a burner or furnace room in diffusion flames, temporarily and on the parallel of combustion flowing turbulent diffusive mixing processes, as described, for example, in German patent application DE 2052543 C3, moreover, that they completely avoid these disadvantages of the shift outputs from acetylene to elevated parts of ethylene. In addition, it remains to emphasize that the possibility of equipping additional unit of the existing installation and method using a simple device and thus their transformation as proposed according to the invention method can be taken as a particularly preferable.

As the source of prophetic the TV, you can use in principle, all hydrocarbons used to produce acetylene and/or synthesis gas, such as methane, higher saturated or unsaturated hydrocarbons, and biofuels, which at the chosen temperature for pre-heating is gas.

Proposed according to the invention the principle of the process can be applied to other methods for producing acetylene and synthesis gas with the aforementioned advantages.

Proposed according to the invention, the method facilitates efficient receipt of acetylene and synthesis gas at high outputs. Time for pre-mixing of both reaction components is significantly reduced, so that high temperatures for pre-heating or pressure source substances, as well as higher content of reactive components can be performed without ignition timing in the mixing chamber, so that the efficiency of the method is further increased.

An additional advantage of the proposed according to the invention method is that in the area of the diffuser, which in conventional burners performs mixing and applying the mixture in the burner unit, no longer prohibits the embedding of the particles, inhibiting the flow, as the local time of the processing gases, increased in the area of the detached vortices can no longer inducer is to no advance ignition. Thus, it is now possible to carry out preferably an internal device, such as an ignition device, which were hitherto not been used in acetylene burners, alternative systems of flame control, measuring probes or summarize the cooling water, for example, for maintenance types of burners according to the German patent application DE 10313528 A1. This method can be carried out preferably when the existing burners by simple changes with less effort and with little technological costs.

Examples

1. When the operation of conventional acetylene torch (25 tons per day) with the use of natural gas is obtained typical gas compositions of products that contain 8,5% vol. acetylene.

2. In the second test according to the invention make the source gas along with natural gas contains about 6% by ethane. As a result of this concentration of acetylene pyrolysis gas increased by 9%vol.

3. If the content of ethane increases more than 20 vol.%, considering the short time there is a mass increase ignition advance and thus the related work of torches, so that efficient operation of a typical installation is no longer possible. Using proposed according to the invention method, you can avoid data reverse ignition and increases the ü concentration of acetylene in the pyrolysis gas to more than 9.5% of acetylene, that means following the increase in output.

1. A method of producing acetylene and synthesis gas by partial thermal oxidation of hydrocarbons, which when used temperatures for pre-heating are gas, in a reactor equipped with a burner with through holes, wherein the transform of the original substance is rapidly and completely mixed only immediately before the flame reaction zone in the through-holes of the burner, and in the mixing zone within the through-holes set average flow rate that exceeds the rate of flame propagation of the existing reaction conditions.

2. The method according to claim 1, characterized in that the diffuser upstream to the burner, through which the burner down one of the starting substances, place one or more firing devices that initiate basic response within the burner.

3. The method according to claim 1, characterized in that the exhaust from the reactor the flow of by-products, preferably hydrogen, return to the reactor and mixed with the hydrocarbon prior to entering the burner.

4. The method according to claim 3, characterized in that the return flow of by-products are mixed with the hydrocarbon and optionally with oxygen before it enters the burner.

5. Pic is b according to claim 3, characterized in that a hydrocarbon use natural gas.

6. The method according to claim 5, wherein the natural gas at the burner, preferably in front of a heater for pre-heating the starting compounds admixed different from the natural gas hydrocarbon mixtures in quantities of more than 10 vol.%, especially more than 20 vol.%.

7. The method according to one of claims 1 to 4, characterized in that a hydrocarbon is used different from the natural gas hydrocarbon mixtures, such as ethane, Aten, liquefied gas, and other higher saturated or unsaturated hydrocarbons, which when used temperatures for pre-heating are a gas.

8. A device for implementing the method according to one of claims 1 to 7, containing a line for supplying one of the initial substances and an additional line for supplying different from the original substances, as well as the burner with through holes for receiving acetylene, supplemented through the intermediate flange of the mixing device for mixing a source of substances that are located in the through-holes of the burner.

9. The device according to claim 8, with the reaction space in the region extinguishing decorated in the form of a ring gap.



 

Same patents:

FIELD: power engineering.

SUBSTANCE: burner for fuel combustion comprises fuel supply line. The fuel supply line consists of several fuel sections. Also each fuel section is connected to another section and is designed for supply of fuel flow. Further, the burner includes a fuel inlet section. This section has the first fuel inlet and the first fuel outlet located at a distance from the first fuel inlet. The fuel inlet section has the first through cross section area and is designed to supply fuel flowing into the first fuel inlet and coming out the first fuel outlet. The burner has an intermediate section of fuel with fuel inlet and outlet device, notably the fuel outlet device is located at a distance from the fuel inlet device. The intermediate fuel section is designed for supply of at least part of flow coming into the inlet fuel device and going out of the outlet fuel device and has the second through cross section area. The second through cross section area changes from the initial through cross section area in the fuel inlet device to different through cross section area in the fuel outlet device. The burner has the fuel outlet section. The fuel outlet section has the second inlet of fuel and the second outlet of fuel located at a distance form the second inlet of fuel. The fuel outlet section is designed for supply of at least part of fuel flow coming onto the second fuel inlet and going out the second fuel outlet and it has the third through cross section area. This third through cross section area in essence is uniform along the whole outlet section of fuel. The burner comprises the first line of oxidant with several oxidant sections. Each oxidant section is connected to another oxidant section. It is designed to supply flow of oxidant. It includes an oxidant pressure chamber letting though oxidant flow and having the fourth through cross section area. At least part of oxidant pressure chamber is located in essence at least next to a part of at least one inlet section of fuel, intermediate section of fuel and outlet section of fuel. The oxidant outlet section lets through at least part of oxidant flow and has the fifth through cross section area. Also the fifth through cross section area is less or equal to the fourth through cross section area and in essence is uniform along the whole outlet section of oxidant. At least part of oxidant outlet section in essence is positioned next to the fuel outlet section.

EFFECT: facilitating upgraded quality of fuel combustion and reduced level of nitrogen oxide exhaust into atmosphere.

28 cl, 19 dwg

FIELD: heating.

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EFFECT: increasing fuel combustion efficiency.

15 cl, 1 dwg

FIELD: heating.

SUBSTANCE: invention related to energy, particularly to burner devices and can be used in gas turbine equipment. Burner device consists of a case (1), a fuel nozzle (2), a front device (3), a fire tube (4). The burner device belongs to gas-turbine engine combustion chamber. The front device executed with holes for fuel nozzles installation (2). The fire tube (4) with the front device (3) located inside of the combustion chamber cage (5). Fuel nozzles (2) connected to a gas ring collector (6). In combustion chamber fire tube and cage (5) between wall area air nozzles (7) located radically. Air nozzles (7) connected to the common ring air collector (9). The air collector (9) located in the case (1).

EFFECT: invention allows to regulate primary air supply to the combustion chamber section during equipment operation, burning device design simplification, it operation safety stays constant, possibility of device change on the running gas turbine equipment.

1 dwg

FIELD: heating systems.

SUBSTANCE: invention refers to gas burners with separate air and gaseous fuel supply. The effect is achieved in gas burner (1) containing main metal housing (6), an inner tube for fuel gas, at least two outer tubes (10) for fuel gas, single tube (8) for supplying pre-heated air, fuel gas supply control system, refractory block (30) and a group of nozzles (20) which are located in a circumferential direction coaxially in relation to inner tube and meant for spraying pre-heated air into combustion chamber.

EFFECT: limit reduction of NOx concentration in exit combustion products.

29 cl,13 dwg

FIELD: heating.

SUBSTANCE: invention relates to powder engineering. The method of fuel firing with oxygen-containing gas wherein fuel jet is injected and, at least, two jets of oxygen containing gas that features high oxygen content. Note here that the 1st jet of aforesaid gas, called a primary jet, is injected to allow its contact with the fuel jet and to form the 1st incomplete firing. Note here that outlet gases, thereafter, contains, nevertheless, at least, one fraction of fuel. Note also that the 2nd aforesaid jet is injected at the distance of l1 from the fuel jet to allow firing together with the said 1sr fuel fraction existing in outlet gases after 1st firing. Oxygen containing gas with low oxygen content is injected at the distance l2 from the fuel jet providing the firing together with the said outlet gases after 1st firing, where l2>l1.

EFFECT: firing gas with low oxygen content.

25 cl, 1 dwg

FIELD: heating.

SUBSTANCE: invention relates to power engineering. The proposed method of fuel firing with oxygen-containing gas wherein fuel jet is injected and, at least, two jets of oxygen containing gas that features high oxygen content. Note here that the 1st jet of aforesaid gas, called a primary jet, is injected to allow its contact with the fuel jet and to form the 1st incomplete firing. Note here that outlet gases, thereafter, contains, nevertheless, at least, one fraction of fuel. Note also that the 2nd aforesaid jet is injected at the distance from the fuel jet to allow firing together with the said 1st fuel fraction existing in outlet gases after 1st firing. The oxidiser primary jet is divided into two primary jets, that is, 1st primary jet, called the central primary oxidiser jet injected into fuel jet centre and 2nd primary jet called the embracing primary jet injected coaxially and around the fuel jet. The rate of the oxidiser central primary jet injection exceeds that of fuel jet injection. The fuel jet injection rate exceeds that of the 1st embracing oxidizer injection. The oxidiser 2nd jet injection rate exceeds that of the oxidiser embracing primary jet. The distance between the oxidiser central primary jet injection and its 2nd jet injection vs the rate of injection of the oxidiser 2nd jet varies between 10-3 and 10-2. The oxidiser 3rd jet is injected at the point located between the point of injecting the oxidiser central primary jet and that of injecting 2nd oxidising jet. The rate of injecting oxidiser 2nd jet exceeds that injecting oxidiser 3rd jet. The distance between the point of injecting oxidiser 2nd jet and that of injecting oxidiser central primary jet vs the distance between the point of injecting oxidiser 3rd jet and that of injecting oxidiser primary jet varies from 2 to 10. Two primary oxidiser jets feature identical oxygen concentration. The oxidizer central primary jet oxygen concentration exceeds that of oxidiser embracing primary jet.

EFFECT: higher furnace reliability.

10 cl, 1 dwg

FIELD: power engineering.

SUBSTANCE: method of fuel combustion when at least one fuel and at least two oxidants are injected: the first oxidant is injected at I1 distance equal to 20 cm at maximum and preferably 15 cm at maximum from point of fuel injection. The second oxidant is injected at I2 distance from point of fuel injection while I2 is greater than I1. Oxidants are injected in such amounts that sum of their amounts is equal to at least stoichiometric amount of oxidant required to provide combustion of injected fuel. The first oxidant is oxygen-enriched air at maximum temperature of 200 °C, and the second oxidant is air preheated to temperature of at least 300 °C. Air is enriched with oxygen so that oxygen concentration in enriched air is at least 30%. Oxygen-enriched air is obtained by mixing ambient air with oxygen from cryogenic source. Preheated air is heated by means of heat exchange using part of hot combustion products. At least two oxidants are injected at I1 distance equal to 20 cm at maximum and preferably 15 cm at maximum while one oxidant called primary is injected mixed with fuel or near fuel and another oxidant called secondary is injected at distance from fuel. Amount of oxidant injected by means of primary oxidant jet ranges from 2 to 50% of oxygen stoichiometric amount required to provide combustion of injected fuel. The secondary oxidant is separated into multiple jets of secondary oxidant. The second oxidant injected at distance I2 is separated into multiple jets of oxidant.

EFFECT: fuel combustion using oxygen as oxidant suitable for retrieving energy from furnace gases.

8 cl

FIELD: the invention refers to the technology of using a cumulative jet.

SUBSTANCE: the mode of formation of at least one cumulative jet includes feeding of at least one gas jet out of at least one nozzle with a converging/diverging configuration located in an injector having a face surface of the injector. At that the face surface of the injector has openings located along the circumference around at least one nozzle, moreover the indicated at least one gas jet has a supersonic speed when it is formed at the output from the face surface of the injector and remains supersonic on a distance coming to at least 20d, where d- the diameter of the output opening of the indicated at least one nozzle. Feeding of fuel from the first group of openings located along the circumference and feeding of an oxidizing agent from the second group of openings located along the circumference. Incineration of fuel and the oxidizing agent fed from the first and the second groups of openings located along the mentioned circumference for formation of a flame shell around at least one gas jet. A great number of gas jets are fed from the injector. The fuel and the oxidizing agents are fed from the first group of openings and from the second group of openings correspondingly alternate with each other on the circumference along which they are located. At least one gas jet, the fuel and the oxidizing agent are fed from the injector directly into the space for injection without passing the zone of recycling formed with the extender of the injector. At least one gas jet passes at a prescribed distance coming at least to 20d, where d- is the diameter of the output opening of the nozzle from which exits a gas jet keeping the diameter of the mentioned gas jet in essence constant.

EFFECT: the invention allows make an arrangement with the aid of which it is possible to form effective cumulative gas jets without need in an extender in the injector or in any other element for forming recycling zone for gases fed from the injector.

9 cl, 3 dwg

FIELD: power engineering.

SUBSTANCE: method comprises injecting at least one type of fuel and at least one oxidizer. The primary oxidizer is injected together with the fuel to generate first incomplete burning. The gases emitting from the first burning comprises at least a part of the fuel, whereas the secondary oxidizer is injected downstream of the site of the fuel injection at a distance larger than that between the fuel injection and primary oxidizer closest to the fuel injection so that to be burnt out together with the fuel part. The flow of the first oxidizer is branched into at lest two primary flows.

EFFECT: reduced emission of nitrogen oxides.

40 cl, 8 dwg

The invention relates to a method for partial oxidation of hydrocarbons and gaseous mixtures containing hydrogen and carbon monoxide

FIELD: chemistry.

SUBSTANCE: invention relates to a method for continuous use of apparatus for producing acetylene from hydrocarbons which are alkanes having chain length of up to C10 via partial oxidation to obtain a mixture of reaction gas, which is directed through one or more compressors, wherein the pressure of the mixture of reaction gas on the suction side of the compression zone is regulated using a regulating device in a given range, characterised by that a predicting regulating device is also used, which works at a higher level which supports this model, where the said predicting regulating device is a Feed-Forward regulator, which reacts to sudden change in mass flow of the mixture of reaction gas greater than 5%.

EFFECT: use of the present method ensures continuous operation of apparatus for producing acetylene in case of high processed mass flow.

14 cl, 1 dwg

The invention relates to a method for production of acetylene and synthesis gas

FIELD: chemistry.

SUBSTANCE: invention relates to a method for continuous use of apparatus for producing acetylene from hydrocarbons which are alkanes having chain length of up to C10 via partial oxidation to obtain a mixture of reaction gas, which is directed through one or more compressors, wherein the pressure of the mixture of reaction gas on the suction side of the compression zone is regulated using a regulating device in a given range, characterised by that a predicting regulating device is also used, which works at a higher level which supports this model, where the said predicting regulating device is a Feed-Forward regulator, which reacts to sudden change in mass flow of the mixture of reaction gas greater than 5%.

EFFECT: use of the present method ensures continuous operation of apparatus for producing acetylene in case of high processed mass flow.

14 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing acetylene through oxidative pyrolysis of methane in the presence of oxygen and a catalyst, characterised by that the catalyst is heated to 700-1200°C by passing electrical current through it. The catalyst used is a fechral alloy which is thermally treated on air at temperature 900-1100°C. The ratio of methane to oxygen is varied in the range of 5:1-15:1.

EFFECT: high output and selectivity of the process.

2 cl, 17 ex, 1 tbl, 1 dwg

FIELD: chemistry.

SUBSTANCE: method of processing carbon-carbonate mineral involves burning limestone in a reactor, obtaining calcium oxide, production of calcium carbide by reacting part of calcium oxide obtained from burning limestone with carbon, bringing part of the obtained calcium carbide into contact with water, obtaining acetylene and caustic lime, bringing gaseous wastes from burning limestone into contact with water to obtain carbonic acid. Limestone is burnt using heat obtained from burning part of the volume of acetylene, obtained from part of the volume of calcium carbide. At least part of the obtained acetylene is used in synthesis of ethanol and/or dichloroethane and/or ethyleneglycol and/or acetone. During synthesis of ethanol and/or dichloroethane, acetylene is reacted with hydrogen in the presence of palladium as catalyst, after which at least part of synthesised C2H4 material is reacted with water vapour, obtaining ethanol, and/or reacted with chlorine, obtaining dichloroethane. Also at least part of the obtained acetylene is subjected to hydrolysis, obtaining ethyleneglycol. Also during synthesis of acetone, part of the obtained acetylene is reacted with water vapour, where the hydrogen obtained is used in said synthesis of ethanol and/or dichloroethane and/or burnt in the burning process. Carbon dioxide obtained from synthesis of acetone is used in the process of producing carbonic acid.

EFFECT: wide range of obtained finished products and prevention of formation of industrial wastes.

4 cl, 1 ex, 1 dwg

FIELD: production processes.

SUBSTANCE: there proposed is the method of device cleaning from deposits formed as a result of purified N-methylpyrrolidone regeneration by N-methylpyrrolidone distillation from material flow of contaminated N-methylpyrrolidone. Contaminated N-methylpyrrolidone is formed according to the method of extractive separation of acetylene from reaction mixture of partial hydrocarbon oxidation after distillation of gaseous acetylene. Note that hot water is supplied to the device and mixed.

EFFECT: proposed method permits to exclude manual operation with solid substances, but at the same time regenerating significant part of purified contaminated N-methylpyrrolidone.

9 cl, 1 dwg, 2 ex

FIELD: inorganic compounds technologies.

SUBSTANCE: invention is directed to production of acetylene and lime through hydrolysis of calcium carbide. Hydrolysis solution is prepared from water/ethanol mixture containing at least 68 wt % ethanol. After hydrolysis, ethanol vapors are condensed to give anhydrous ethanol. Acetylene and lime are also obtained in anhydrous form.

EFFECT: enhanced process efficiency due to wastelessness of the process and possibility of using carbide dust and fines, improved safety of process, and improved quality of generated acetylene.

1 dwg, 2 ex

FIELD: chemical industry branches, possibly manufacture of calcium carbide, calcium oxide, acetylene, carbonic acid and slaked lime.

SUBSTANCE: coal-carbonate mineral raw material - lime is fired in reactor 1 with use of acetylene as high-temperature energy carrier. Lime produced in reactor 1 is fed to user and(or) to second reactor 2 and adding coke or coal with fraction size 20 -25 mm and with sulfur content less than 1% into reactor 2. Some part of acetylene further produced is also added to reactor 2. Ready calcium carbide is removed out of reactor 2 and it is fed to user and(or) to fourth reactor 4 where after contact with water acetylene and slaked lime are formed. Acetylene is fed through pipeline 15 to user and(or) to reactors 1 and 2. Ready slaked lime is fed to user. Gaseous products such as carbon dioxide from reactor 1 and carbon oxide from reactor 2 are fed to third reactor 3 where after contact with water carbonic acid is formed and fed to user as "dry ice" or in liquefied state.

EFFECT: possibility for producing wide assortment of commercial products in one waste-free cycle, elimination of environment contamination.

2 cl, 1 dwg

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