SU1425196A1 - Bed for simulating the gasifying of coal dumps - Google Patents

Abstract

The invention relates to the gasification of coal waste dumps and can be used to investigate the mechanism for moving a hotbed in a waste mass. The goal is to increase the informativeness of the simulation results by improving the conditions of visual observations. The stand includes a heat-insulated body 1, made of detachable sections 2, connected tightly. The housing 1 is filled with crushed coal rock. Before filling the rock into the housing 1, the heat-resistant partitions 4 are installed in the entire height of the load, dividing the rock into several compartments and made in the form of bonded metal grids. The ends of the partitions are connected to the joints of the split sections. The dimensions of the openings of the mesh of the partitions are determined from the ratio, 1 / 3-1, where 1 is the size of the hole, MM, the size of the minimum fraction of crushed coal, mm. The device 10, for example, a gas-air burner, ignites coal, the combustion temperature is controlled by sensor 9. Then the burner is turned off and air is supplied to the combustion zone through nozzles 7, and gas is removed from nozzle 8 to receiving system 13. 1 or . I. % i (L 4 2; O O)

Description

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The invention relates to mining, in particular to the gasification of coal waste dumps, and can be used to study the mechanism for moving the source of combustion in the dump array.

The purpose of the invention is to increase the informativeness of the simulation results by improving the conditions of visual observations,

The drawing shows the layout of the simulation bench with the removed section.

The stand contains a heat-insulated housing 1, which houses the model 15 dump dump. The body is made in the form of detachable sections 2, which are sealed at the joints between each other, the upper part of the body is sealed with a lid 3. several compartments 3; the implementation of partitions in the form of bonded metal nets, the ends of which are in contact with the joints of the sections without a gap, allows, after the experiment, with alternate removal of sections 30, 2, visually Yedelev be displacement of the combustion chamber in the open compartments and simultaneously hold pieces vygazovannoy breed in adjacent compartments. The reliability of the retention of the fragments of the rock 35 taking into account the decrease from the volume due to maximum degassing (30% of organic matter) is ensured by the choice of a grid with holes 6, the dimensions of which are 1 (1/3 is Ddvm, where 40 is the minimum fraction of the loaded rock, mm,

Along the perimeter of the casing, at several levels, the nozzles 7 for supplying reagents and the DZ below them are installed for fitting into the model of the outlet 8 for gasification products. Nozzles supply temperature sensors 9, and a housing with an ignition device 10, which, if necessary, is placed in any part of the model,

- The stand works as follows.

Using the device 10, for example, a g of an air-gas burner mounted in the upper section 2 of the housing, the model of the coal waste massif is ignited, creating a combustion zone with

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temperature of about 800-1000 ° C, which is controlled by the sensor 9, then the burner is turned off and air is supplied to the combustion zone from the power supply system 11 through nozzles 7. The resulting gas is withdrawn from the pipe 8 and fed to the receiving system 12. By alternately feeding the oxidant to different pipes, the source of combustion is directed throughout the entire volume of the model, based on the conditions of maximum mass generation, the quality of the obtained combustible gas is controlled in the analyzer of the receiving system 12,

Claims (1)

At the end of the gasification process, sections 2, starting from the top, are disconnected alternately, and the rock is unloaded from the open compartments 5. determine the direction of movement of the source of combustion, after which the degree of outgassing and other changes in the rock are evaluated analytically. Invention Formula A bench for simulating gasification of coal dumps, including a thermally insulated housing with a lid, and nozzles for supplying reagents and removing gasification products filled with crushed coal, a means of igniting coal, supply and receiving systems, and instrumentation, characterized in that in order to increase the informativeness of the simulation results by improving the conditions of visual observations, the body is made in the form of detachable sections interconnected tightly, the stand is equipped with heat-resistant The partitions installed inside the body with the intersection of each other and the formation of compartments between the partitions and body sections, while the ends of the partitions are connected to the joints of the detachable sections, and the partitions are made of a grid, the hole sizes of which are determined from the ratio -i- 1 / 3-1, S1min where 1 is the size of the hole, mm   the size of the minimum fraction of crushed coal rock, mm.