RU29121U1 - Solid fuel feed system - Google Patents

Description

2002131567

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Solid fuel feed system

The utility model relates to fuel supply systems in which quality control of solid fuels is carried out, and can find application in the power system and other industries, for example, in coal processing plants.

A known fuel supply system selected as a prototype is a fuel supply unit comprising a transfer unit equipped with receiving lines for unloaded and stored fuel and lines for issuing stored and consumed fuel, a fuel sample preparation unit for chemical analysis, and an express fuel quality control complex equipped with a sampler, a conveyor for measuring the measured flow , ash and moisture meters, processing information processing unit and storage bin 1.

In the prototype, sampling for express fuel quality control is carried out on the line for receiving stored fuel (technological control of fuel entering the warehouse) and on the line for issuing consumed fuel (technological control of fuel entering the consumer).

The disadvantage of the prototype is that for the incoming control of the fuel entering the warehouse or the consumer through the line of receiving unloaded fuel, and the fuel coming from the warehouse through the line of issuing the stored fuel, the prototype device requires additional equipment, for example, in the form of a second complex of express control.

The objective of the utility model is to provide input and technological control of fuel with one express control complex.

МГЖ F23 К 3/00 Technical field

State of the art

Utility Model Essence

The subject of the utility model is a solid fuel supply system containing a transfer unit, to which supply lines for unloaded and stored fuel and lines for issuing stored and consumed fuel, a unit for preparing fuel samples for chemical analysis, and an express fuel quality control complex equipped with a sampler, a conveyor former the measured flow, ash and moisture meters, a processing information processing unit and a storage hopper, while the sampler installed It is located in the filling unit, and the storage hopper is placed after the conveyor for the measured flow in front of the sample preparation unit for chemical analysis.

This allows you to carry out input and technological control of fuel with one set of express control.

A useful model has a development consisting in the fact that the complex of express-quality control of fuel is equipped with a mechanism for preliminary crushing of samples placed between the sampler and the conveyor former of the measured flow.

This allows you to send unmilled fuel to express control and, thereby, expand the functionality of its quality control in the system.

The utility model has another development, consisting in the fact that the processing unit for measuring information is equipped with means for controlling the supply of fuel to the consumer.

This allows you to quickly, automatically take into account the results of express quality control during its combustion, for example, in boiler plants of power plants.

The sampler is installed in the falling fuel stream.

This improves the representativeness of fuel sampling.

Utility Model Implementation

Figure 1 presents the technological scheme of the fuel supply system, taking into account its development. The diagram indicates:

1 - filling unit,

2- line for receiving unloaded fuel,

3- line for receiving stored fuel;

4- line for the issue of stored fuel,

5- line for the issuance of consumed fuel,

6- sampler

7 - a complex of express fuel quality control,

8 - conveyor shaper measured flow,

9- fuel ash meter (ash meter),

10 - fuel moisture meter (moisture meter),

11- processing information processing unit,

12-storage bin

13 - the mechanism of preliminary crushing of samples,

14 - site for the preparation of fuel samples for chemical analysis,

15- fuel supply controls,

16 - unloading device,

17- fuel depot.

The feed system operates as follows.

Fuel enters the transfer unit 1 via line 2 from the unloading device 16 or via line 3 from the storage 17. From node 1, fuel is supplied either through line 4 to the warehouse 17 or via line 5 to the consumer.

Sampler 6, located in node 1, samples are taken from the incident fuel stream 18 for express control by the complex

7. The selected samples are supplied to the mechanism 13 preliminary crushing of samples, where the size of the fuel is brought up to 40 mm Crushed fuel is poured onto the conveyor former 8, where it is formed into a measuring stream (with a given width and height). An ash meter 9 and a hygrometer 10 are placed above the measuring flow. They irradiate the fuel flow and convert the scattered radiation, the intensity of which is proportional to the ash content and humidity, respectively, into electrical signals.

In block 11, these signals are converted into digital data, which are processed, recorded in the form of documents and displayed on the scoreboard or PC monitor available in block 11.

Block 11 may be equipped with means 15 for controlling fuel supply (for example, elements for interfacing with a drive of plows loading bunkers of boiler units of a power plant) depending on the results of express control of ash and humidity.

From the conveyor former 8, the measuring fuel flow, under its own weight, is poured into the hopper 12 and accumulates there during the day or shift, depending on the accepted storage option. Then the fuel from the hopper 12 enters the site 14 of the preparation of fuel samples for chemical analysis, where additional fuel is milled to the size of the analytical sample (size up to 3 mm). Part of the crushed fuel is transferred from unit 14 to the chemical laboratory for analysis, the remaining part is returned to the general flow through line 19. The data obtained in the laboratory are compared with the results of express control and, in case of unacceptable deviations, meters 9 and 10 are reconfigured.

The placement of the sampler 6 in node 1 allows using complex 7 to conduct both the input express control of the fuel received on lines 2 (from the unloading device 16) and 3 (from the warehouse 17), as well as the technological express control of the fuel issued on lines 4 ( on the

warehouse 17) and 5 (to the consumer).

This creates the ability to control the fuel received at the warehouse, and then issued from the warehouse. This allows you to evaluate the loss of fuel quality during its storage, which has not been previously done.

The introduction of a pre-crushing mechanism allows sampling of unmilled fuel for rapid analysis, which expands the capabilities of express control.

The installation of the sampler in the falling fuel stream allows to increase the representativeness of the sampling compared to the prototype, in which sampling is carried out by a ladle from the conveyor belt and therefore the part of the fuel remaining on the tape is not covered by express control.

Industrial applicability

The utility model can be implemented on a serial basis.

manufactured equipment for new and reconstructed

power plants and other facilities using fuel supply systems.

Sources of information

1. Karagodin G.M. The system of operational quality control of solid fuels at power plants. Heat power engineering. 1998. No. 4.

Claims (4)

1. A solid fuel supply system, comprising a transfer unit, to which lines for receiving unloaded and stored fuel and a delivery line for stored and consumed fuel, a fuel sample preparation unit for chemical analysis and an express fuel quality control unit equipped with a sampler, a conveyor for measuring the measured flow, are connected ash and moisture meters, a measuring information processing unit and a storage hopper, while the sampler is installed in the overflow unit, and the storage th hopper conveyor placed after the flow shaper measured before sample preparation unit for chemical analysis. 2. The system according to claim 1, in which the complex of express quality control of fuel is equipped with a mechanism for preliminary crushing of samples placed between the sampler and the conveyor former of the measured flow. 3. The system according to claim 1, in which the measuring information processing unit is equipped with fuel supply control means. 4. The system according to claim 1, in which the sampler is installed in the incident fuel stream.