Processing method of coal - carbonate mineral raw material

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

 

The invention relates to a method of processing Plekhanovo minerals and can be used in deep processing of obtaining calcium carbide and /or acetylene.

A method of refining Plekhanovo mineral raw materials, including heating and calcination of limestone and subsequent cooling of the resulting lump lime, carbon capture particulate fractions of lime and the subsequent briquetting powdered and lumpy lime (see A.S. USSR №1505902, CL 04 In 2/02, 1989).

The disadvantage of this solution in the increased flow of air (calcination is in the furnace of the fluidized bed), also small range of derived products (lime), significant environmental pollution by oxides of carbon.

Also known is a method of processing Plekhanovo mineral raw materials, including the burning of limestone in the reactor feed into it and the burning of high-temperature energy source (see A.S. USSR №1449553, CL 04 In 2/02, 1989).

However, this technical solution is also a small range of derived products (lime), low environmental friendliness of the production process, in addition, complicated process to ensure the production of high-temperature energy source.

The challenge which seeks the proposed solution is to expand the range policemilitary products and elimination of pollution waste production.

The technical result obtained by the solution of the problem, reflected in the expansion of the spectrum produced commercial products, the exception occurrence of waste production and ensure the independence of production from external sources of high-temperature energy source.

The problem is solved in that a method of processing Plekhanovo mineral raw materials, including the burning of limestone in the reactor feed into it and the burning of high-temperature energy source, characterized in that at least part of the calcium oxide obtained by calcination of limestone, used for the production of calcium carbide, why move it to the second reactor, where the heat is introduced into the reaction with carbon, such as crushed coal, while the gaseous products of the first and second reactors are selected and used for the production of carbon dioxide, and carbon dioxide is withdrawn from the first reactor, and carbon monoxide is withdrawn from the second reactor, move into the third reactor, which is injected into the reaction with water, in addition, at least part of the calcium carbide move into the fourth reactor, which is put in contact with water, for burning limestone and/or production of calcium carbide as a high temperature energy source use, at least part of the obtained what about the acetylene. In addition, as the main processing products Plekhanovo mineral raw materials get calcium carbide and/or calcium oxide and/or acetylene, as well as additional products are carbon dioxide and hydrated lime.

Comparative analysis of the characteristics of the claimed solution with the characteristics of the prototype and analogues demonstrates compliance of the claimed solution to the criterion "novelty".

Signs of a distinctive part of the formula of the invention provide a solution to the following functional tasks:

The feature “at least part of the calcium oxide obtained by calcination of limestone, used for the production of calcium carbide provides the possibility of expanding the spectrum produced commercial products and of the independence of the production from external sources of high-temperature energy source.

The sign “for what it is (calcium oxide) is moved to the second reactor, where the heat is introduced into the reaction with carbon, such as crushed coal,” reveals the technological content of the above-mentioned characteristic.

Sign “of the gaseous products of the first and second reactors are selected and used for the production of carbon dioxide, and carbon dioxide is withdrawn from the first reactor, and carbon monoxide is withdrawn from the second reactor, move into the third reactor, which is injected into reacts the Yu water provides the gaseous waste disposal processes of calcination of limestone and production of calcium carbide by turning them into additional product.

The feature “at least part of the calcium carbide move into the fourth reactor, which is put in contact with water provides the possibility of expanding the spectrum produced commercial products (due to the production of acetylene) and the independence of the production from external sources of high-temperature energy source, in addition, ensures the lime “pushonki”.

The sign “for burning limestone and/or production of calcium carbide as a high temperature energy source using at least a portion received in the fourth reactor of acetylene provides the possibility of expanding the spectrum produced commercial products and of the independence of the production from external sources of high-temperature energy source.

Signs of the second paragraph of formulas reveal the possible range of marketable products produced by the method.

The invention is illustrated by the drawing, which shows a diagram of the method.

To implement the method uses a technology comprising reactors 1-4, the first sampling unit 5, dispensers 6 and 7, the second sampling unit 8, naturally nodes 9 and 10, transportation of the node 11, the boot node 12, a coal-loading node 13, the pipeline 14, the pipeline 15.

As the first reactor 1 is kiln limestone is of known construction, equipped with loading the node 12, which feeds the limestone. The first reactor 1 is connected by a pipeline 15 to the first sampling unit 5 (which are used as known sets of gas-cleaning equipment, providing selection of CO2and the pipeline 14, for example made in the form of a guide channel with feeder 6, which provides the selection of the flow of lime (Cao) obtained by the calcination of limestone in the area designated for transmission to the consumer, it is clear that, if this is not provided, this node is used only as a feeder of the second reactor 2.

As the second reactor 2 is a furnace for the production of calcium carbide, equipped with a coal-loading node 13 of known construction and sampling unit 8 (which are used as known sets of gas-cleaning equipment, providing the selection). If at this stage of production is provided by the use of acetylene as a high-temperature energy source, a furnace for the production of calcium carbide must have appropriate heat exchange elements (not shown), supporting the use of waste heat generated by combustion of acetylene, and transferring materials-reagents (Cao).

Sampling units 5 and 8 through pipeline 15 is connected with the third reactor 3, is connected also vodopada node 11 (made in the form of water containers, equipped with a pumping and metering and measuring equipment of known construction, ensuring implementation of the process of synthesis of N2CO3). The output of the third reactor 3 through produktovod 14 associated with the storage of carbon dioxide (not shown), the construction of which is determined by the form of supply of carbon dioxide to the consumer, i.e. liquefied or “dry ice”, and does not differ from known designs.

The output of the reactor 2 through a pipeline 14, for example made in the form of a guide channel, is connected with the metering device 7 which enables the selection of the flow of calcium carbide produced in the reactor part of the products intended for transmission to the consumer, it is clear that, if this is not provided, this node is used only as a feeder of the fourth reactor 4.

As the fourth reactor 4 use the generator, designed for the generation of acetylene from calcium carbide. Reactor 4 is connected with the pump node 11, and his “gas” exit through the gas distribution unit 9 is associated with either a gas holder (not shown - is intended for storage of acetylene before sending it to the consumer), or gas distribution node 10, regulating the flow of acetylene in the reactors 1 and 2 (structurally, these nodes are similar to the known distribution devices and choose what I'm taking into account their compliance with the operating parameters of the consumption of acetylene and the section of pipeline 15). The second output of the reactor 4 through the respective pipeline 14 is associated with the storage of hydrated lime (not shown).

The claimed method is implemented as follows.

Limestone is injected into the reactor 1 and make it burning, burning acetylene. In the process of burning the limestone decomposes into lime and carbon dioxide by the formula

Ready lime (Cao) is removed by the pipeline 14 to the dispenser 6, providing a selection of the total amount of lime used for transmission to the consumer, and the part intended for further processing. Part lime intended for further processing, is fed to the second reactor 2, where in the presence of carbon (in the form of coke or coal particle size of 20-25 mm and a sulfur content of less than 1%) is converted into calcium carbide. The production of calcium carbide “is” according to the formula

Ready calcium carbide (CAC2) removes the pipeline 14 to the dispenser 7, providing a selection of the total production of parts of calcium carbide, intended for transmission to the consumer, and the part intended for further processing. Part of calcium carbide, used for further processing, is fed into the fourth reactor 4, where in is put into contact with water lane and the rabatyvaetsya in acetylene. The production of acetylene “goes” by the formula

CAC2+2H2O=C2H2+CA(Oh)2

Ready acetylene (C2H2) is removed through the pipeline 15 and through the gas distribution unit 9 is fed either to the consumer, or only in the first reactor 1, or the first and the second reactor 2. Slaked lime (Ca(OH)2) is passed to the consumer for use.

Thus, as the main processing products Plekhanovo mineral raw materials get calcium carbide and/or calcium oxide and/or acetylene, as well as additional products are carbon dioxide and hydrated lime. When the presence of customers and corresponding additional components main products Plekhanovo mineral raw materials can be used for further processing in known schemes with obtaining, for example, superphosphate, urea, ethanol, etc.

Operational parameters of the implementation of the method at all stages do not differ from the known.

1. A method of processing Plekhanovo mineral raw materials, including the burning of limestone in the reactor feed into it and the burning of high-temperature energy source, characterized in that at least part of the calcium oxide obtained by calcination of limestone, used for the production is arbid calcium, why move it to the second reactor, where the heat is introduced into the reaction with carbon, such as crushed coal, while the gaseous products of the first and second reactors are selected and used for the production of carbon dioxide, and carbon dioxide is withdrawn from the first reactor, and carbon monoxide is withdrawn from the second reactor, move into the third reactor, which is injected into the reaction with water, in addition, at least part of the calcium carbide move into the fourth reactor, which is put in contact with water, for burning limestone and/or production of calcium carbide as a high temperature energy source use, at least part of the produced acetylene.

2. The method according to claim 1, characterized in that as the main processing products Plekhanovo mineral raw materials get calcium carbide, and/or calcium oxide and/or acetylene, as well as additional products are carbon dioxide and hydrated lime.



 

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