SU1353799A1 - Method of heat processing of combustible shale - Google Patents

Abstract

The invention relates to a method. thermal processing of oil shale and reduces the amount of mechanical impurities in the resin. The method includes preheating of the initial fuel, semi-coking it with an ash heat carrier to form a vapor-gas mixture, cleaning it from mechanical impurities and coke solenoid residue that is burned to obtain an ash heat carrier. To reduce the content of mechanical impurities in the resin, mechanical impurities separated from the main stream of the vapor-gas mixture are mixed with the initial fuel. As a result of mixing, vapor – gas products are obtained, returned to the vapor – gas mixture stream, cooled, and jointly sent for purification from mechanical impurities. At the same time, the temperature of fuel preheating is maintained below its bituminization temperature, and the temperature of the vapor-gas mixture is maintained at 10-20 above those of the point: dew of the vapor-gas mixture. 2 hp f-ly, 1 tab., 1 ill. (L with

Description

The invention relates to the hard processing of solid fuels and can be used in the chemical, fuel-processing industry and in the power industry.

The purpose of the invention is to reduce the holding of mechanical impurities in the resin.

The drawing shows an installation diagram for implementing the method.

The installation consists of a mixer 1 of mechanical impurities caught from a vapor-gas mixture, a mixture

The latter compressor (the ejector is compressed and directed to interfacing with the gas-vapor mixture before cleaning it from mechanical impurities. When mixing, the gas-vapor temperature drops sharply and approaches the dew point.

Example. On installation on slate-kukersit with the following slave characteristic: W 0,89%; calcination ash A °, 48.68%, carbonate carbonate (CO) 19.19; condition

on organic mass C

org

tel 2 fuels with solid heat transfer - 15 SOBU, 2.10%; heat of combustion Q

32,

11.92 MJ / kg. The main technological parameters of the process when processing

11.92 MJ / kg. The main technological parameters of the process for processing, heat separator 3, reactor 4, furnace 5, vapor-gas separator 6, compressor 7 (ejector).

The method is determined with a trace of 20 impurities trapped from time to time.

The crushed, dried and heated to 120-170 ° C fuel is transferred to the mixer 1, into which from the separator

ke shale: shale preheating temperature 160 G, mixture temperature of a pair of gas-vapor mixture and source shale, 210 C, temperature in the reactor 480 ° C, temperature of the mixture primary

gas-vapor mixture with the main stream 6 vapor-gas mixture is captured-25 vapor-gas mixture before cleaning it from

mechanical impurities 390 С, average

mechanical impurities from a gas-vapor mixture. Next, the mixture consisting of mechanical impurities and fuel is sent to the mixer 2, into which the heat transfer fluid is supplied from the heat separator 3. The resulting mixture, heated to the semi-coking temperature (475-495 °), is transferred to the reactor 4, where the formation of the vapor-gas mixture and the coke-ash residue is completed. The last of the reactor is transferred to the furnace 5, where its combustible mass is burned at 700 850 C air, and the non-combustible (ash) mass is heated and its large fractions (0.5-10 mm), separated in separator 3, are returned to reactor 4 as a heat carrier ash to provide heat to the semi-coking process. Small fractions of ash (0.5 mm) and flue gases are removed and, after cleaning and disposal, the physical taggs are dumped into the biosphere.

The vapor-gas mixture obtained in the reactor 4 after purification in the separator 6 is directed to condensation to obtain the desired processed products. Mechanical impurities trapped in separator 6 are sent to mixer 1 and re-dragged with fuel. With stirring, the fuel is heated, and the primary low-temperature gas-vapor mixture is released at 200-400 C.

the residence time of the gas-vapor mixture at 480 ° C is 5 s, the average residence time of the gas-vapor mixture at 390 7 s.

30 At the same time, products are received per organic mass, May.%: Total tar 70.2, including gasoline 3.1; semi-coking gas 10.2, pyro-. genetic water 7.3; char (by

25 differences) 12.3. The content of acidic components (phenols) in the total resin is 29.5%. The content of mechanical impurities in the total resin is 0.4-0.6%. The positive effect, when implementing the proposed improvement, compared with the known method, is confirmed by the data given in the table.

45

50

55 Suggested. 70.2

Lime 62.5

29.5 0.4-0.6 16.5 1-1.5

The last compressor (ejector) 7 is compressed and sent for mixing with the gas-vapor mixture before it is cleaned from mechanical impurities. When mixing, the temperature of the gas-vapor mixture drops sharply and approaches the dew point.

Example. The unit is supplied with slate-kukersite with the following operating characteristic: W 0.89%; calcination ash A °, 48.68%, carbonate carbonates (CO) 19.19; conditional organic mass

org

SOBU, 2.10%; heat of combustion Q

32.13%;

SOBU, 2.10%; heat of combustion Q

11.92 MJ / kg. The main technological parameters of the process in the processing of shale: the temperature of the heating of the shale is 160 G, the temperature of the mixture of mechanical impurities captured from

gas-vapor mixture and initial shale, 210 С, temperature in the reactor 480 ° С, mixture temperature of primary

the residence time of the gas-vapor mixture at 480 ° C is 5 s, the average residence time of the gas-vapor mixture at 390 7 s.

At the same time, products are received on an organic mass, May.%: Total resin 70.2, including gasoline 3.1; semi-coking gas 10.2, pyrogenetic water 7.3; char (by

differences) 12.3. The content of acidic components (phenols) in the total resin is 29.5%. The content of mechanical impurities in the total resin is 0.4-0.6%. The positive effect upon the implementation of the proposed high level compared with the known method is confirmed by the data given in the table.

45

70, 2

62.5

29.5 0.4-0.6 16.5 1-1.5

Claims (3)

1. The method of thermal processing of fuel shale, including its crushing, preheating, mixing with solid coolant, semi-coking to form a vapor-gas mixture and coke-ash residue, their separation tapping, subsequent burning of the coke-ash residue to produce a solid heat carrier, separating the vapor-gas mixture and mechanical impurities, feeding vapor-gas mixture for condensation, characterized in that, in order to reduce the content of mechanical impurities in the resin, while maintaining Air Editor N. Rogulich Order 5670/24. Circulation 463 VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Proektna st, 4 in her phenolic. compounds separated from the vapor – gas mixture, the mechanical impurities are mixed with the preheated shale, the vapor – gas products formed are separated and fed to the vapor – gas mixture stream before it is separated from the mechanical impurities. 2. A method according to claim 1, characterized in that the temperature of the vapor-gas mixture is maintained 10-20 ° C above the dew point temperature of the vapor-gas mixture.  3. The method according to claim 1, characterized in that the preliminary heating is carried out to a temperature below the bituminization temperature. Smoke vases Parygazoval mixture Compiled by N. Ageenko Tehred L. Oliynyk Corrector, Shekma P) written