CN107807029A - A kind of online sample preparation and test system - Google Patents

Abstract

The invention discloses an on-line sample preparation and testing system, comprising a sampling unit for preparing a primary sub-sample into a shared coal sample, a first divider and an online full moisture testing system; the first divider is used for performing a test on the shared coal sample Divide to prepare the test full water sample, its feed port is connected to the discharge port of the sampling unit, and the first shrink divider is provided with the first outlet for discharging the test full water sample; the online full moisture test system and the first outlet Connection for collecting and testing full water samples and performing moisture content tests. The on-line sample preparation and testing system disclosed in the present invention directly enters the on-line full-moisture testing system after the test full-water sample is prepared to measure the moisture content of the coal sample. The measurement process does not need to package the whole water sample and then transfer it to the laboratory for testing, which reduces the test process, shortens the time between the preparation of the whole water sample and the test, reduces the water loss in the whole water sample, and improves the accuracy of the measurement results. accuracy.

Description

An online sample preparation and testing system

technical field

The invention relates to the technical field of coal quality analysis instruments, and more specifically relates to an online sample preparation and testing system.

Background technique

The total moisture in coal refers to the total free moisture in coal, that is, the sum of external moisture and internal moisture in coal. It is one of the important indicators to characterize the performance of coal, which is directly related to the transportation capacity, pricing and settlement, and affects the economic interests of both parties in the media transaction.

The coal quality analysis industry often measures the total moisture of coal samples through the process of sampling, preparation and testing and analysis. The online sample preparation system commonly used in the prior art only performs preliminary crushing and shrinking of coal quality, and collects samples to prepare common coal samples. The full-moisture coal sample (referred to as the full-water sample) is generally separated from the shared coal sample, and no separate sampling is performed. The shared coal sample can be broken and divided to obtain a full-water sample. The full-water sample is packaged and marked and sent to the laboratory. Carry out the determination of total moisture. During the testing process, the coal sample is first shaken, and then taken out for testing to obtain the total moisture data and complete the determination of the coal moisture content.

When using the above-mentioned online sample preparation system for total moisture measurement, due to the many steps and locations of coal collection, preparation, and testing, the cumbersome process standards, and the long time span, it is easy to cause the loss of moisture in the coal sample, resulting in inaccurate total moisture measurement results. precise.

To sum up, how to provide an online sample preparation and testing system that can reduce the water loss of the whole water sample and improve the accuracy of the test results is an urgent problem to be solved by those skilled in the art.

Contents of the invention

In view of this, the purpose of the present invention is to provide an online sample preparation and testing system, which can reduce the water loss of the whole water sample and improve the accuracy of the test results.

In order to achieve the above object, the present invention provides the following technical solutions:

An online sample preparation and testing system, including a sampling unit for preparing a primary sub-sample into a common coal sample, and also includes:

The first shrinking device, whose feed port is connected to the discharge port of the sampling unit, is used to shrink the common coal sample to prepare a test full water sample, and the first shrinking device is provided for discharging The first outlet of the test full water sample;

An online total moisture testing system is used to collect the test full water sample and perform a moisture content test, and the online total moisture testing system is connected to the first outlet.

Preferably, the sampling unit includes a second reducer for reducing the primary sub-sample to prepare a common sub-sample and is connected to the outlet of the second reducer for collecting the common sub-sample to form a common coal A sample collector, the outlet of the sample collector is connected to the inlet of the first shrinker.

Preferably, it also includes a transfer device for transporting the common coal sample to the first shrinker, the transfer device connects the inlet of the first shrinker and the outlet of the sample collector feed port.

Preferably, the conveying device includes a conveyor belt, one end of which is arranged below the outlet of the sample collector, and the other end is arranged above the inlet of the first shrinker.

Preferably, the first divider includes a second divider.

Preferably, the first shrinker can be used to prepare a backup full water sample, and is provided with a second outlet for discharging the backup full water sample.

Preferably, it also includes an analysis sample testing system, the first shrinker can be used to prepare the analysis sample, and the first shrinker is provided with a third outlet for discharging the analysis sample, and the third outlet is connected to the The analytical sample test system is connected.

The online sample preparation and testing system provided by the present invention includes a connected first shrinker and an online full moisture test system; after the sampling unit prepares the primary sub-sample into a common coal sample, it is obtained through the shrinkage treatment of the first shrinker To test the full water sample, the online full moisture test system conducts a moisture content test on the collected test full water sample.

The on-line sample preparation and testing system of the present invention divides the shared coal sample prepared on-line, and prepares and tests the full water sample on-line; the online full-moisture testing system connected with the first shrinking device, prepares the full water sample for the test. After completion, the collected water samples can be directly tested for moisture content online, without the need to package the full water samples and transfer them to the laboratory for testing, which reduces the testing process and shortens the time between the preparation of the full water sample and the test. time, thereby reducing the water loss of the whole water sample and improving the accuracy of the measurement results.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is the structural representation of the specific embodiment provided by the present invention;

Fig. 2 is a schematic flow chart of a specific embodiment provided by the present invention.

The reference numbers in Figure 1-2 are:

Iron removal feeding belt 1, crusher 2, shrinking and discarding belt 3, sample collector 4, conveyor belt 5, first shrinking device 6, second outlet 7, third outlet 8, online full moisture testing system 9, The discarded material flowback device 10 and the second shrinker 11 .

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The core of the invention is to provide an online sample preparation and testing system, which can reduce the water loss of the whole water sample and improve the accuracy of the test results.

Please refer to Fig. 1 and Fig. 2, Fig. 1 is a schematic structural diagram of a specific embodiment provided by the present invention; Fig. 2 is a schematic flow chart of a specific embodiment provided by the present invention.

The present invention provides an on-line sample preparation and testing system, comprising a sampling unit for preparing a primary sub-sample into a shared coal sample, a first divider 6 and an online full moisture testing system 9; the first divider 6 is used to The coal sample is divided to prepare a full water sample for testing, and its feed port is connected to the discharge port of the sampling unit, and the first shrinkage device 6 is provided with a first outlet for discharging the full water sample for testing; the online full moisture testing system 9 is connected with the first outlet for collecting and testing full water samples and performing moisture content testing.

Specifically, the transported, large-volume coal samples and other materials are used as primary sub-samples, and after preliminary treatment by components such as the iron removal feed belt 1 and the crusher 2 in the sampling unit, a shared coal sample is formed. Common coal samples include coal samples such as full water samples and analysis samples, where full water samples refer to coal samples used for moisture content testing, and analysis samples refer to coal samples used to determine ash content, fixed carbon content, calorific value, etc. Indicator coal samples. The sampling unit is provided with a discharge port for discharging a common coal sample, and the discharge port is connected with the feed port of the first shrinker 6 .

The first divider 6 is a mechanical divider such as a rotating trough or a rotating container or other dividers. After the first shrinking device 6 collects the shared coal sample, it is shrunk and divided to prepare a full water sample for testing, and the full water sample for testing is a full water sample for entering the online full moisture testing system 9 for moisture content testing; the first The splitter 6 is provided with a first outlet for discharging the full water sample for testing, and the first outlet is connected to the online full moisture testing system 9 to realize the determination process of the full water sample for testing.

It can be understood that other shrinkers in this application may be mechanical shrinkers or other shrinkers.

In the on-line sample preparation and testing system provided by the present invention, the first divider 6 divides the prepared shared coal sample to obtain a full water sample for testing; outlet, and the first outlet is connected with the online full moisture testing system 9. After the test full water sample is prepared, it directly enters the online full moisture test system 9 to measure the moisture content of the coal sample.

The above-mentioned device forms a complete system for preparing whole water samples and measuring moisture, which can independently complete the preparation and testing of whole water samples. During the measurement process, it is not necessary to package the whole water samples and transfer them to the laboratory for testing, which reduces the testing process, The time between the preparation and testing of the full water sample is shortened, thereby reducing the water loss in the full water sample, improving the accuracy of the measurement results, and at the same time facilitating the management of incoming coal by coal units.

Optionally, in the process of preparing a common coal sample, the sampling unit includes a second reducer 11 that divides the primary sub-sample to prepare a common sub-sample and is connected to the outlet of the second reducer 11 for collecting the common coal sample. The sub-sample is used to form a sample collector 4 for a common coal sample, and the discharge port of the sample collector 4 is connected with the feed port of the first shrinkage device 6 .

After the primary sub-sample has been crushed by the crusher 2 and other components, it can be transported to the feed port of the second shrinker 11 by means of a conveying device such as the shrinkage waste belt 3, and processed by the second shrinker 11 to obtain the common coal The sub-sample of the sample is the common sub-sample; the setting of the second shrinking device 11 can reduce the volume and quality of the coal sample, which is more conducive to subsequent shrinking and determination.

Optionally, the material inlet of the second shrinking device 11 can be arranged at a fixed position of the shrinking and dividing discarding belt 3, and is provided with a discarding outlet connected to the shrinking and dividing discarding belt 3 for discharging discarded materials, The end of the shrinking and dividing waste material belt 3 is connected with a waste material return device 10, and the waste material processed by the second shrinking device 11 can directly enter the waste material return device 10 through the shrinking and dividing waste material belt 3, so as to realize the waste material recovery. process.

Optionally, the feed inlet of the second shrinking device 11 can also be arranged below the end of the shrinkage belt 3, so as to receive the shared samples dropped by the shrinkage belt 3; The discarded material outlet for discharging the discarded material is connected with the discarded material return device 10 to realize the disposal process of the discarded material.

It can be understood that the second shrinkage device 11 is provided with an outlet for discharging a shared sub-sample, and the outlet is connected with a sample collector 4, and the shared sub-sample is collected by the sample collector 4 and forms a common coal sample as a preparation test for total moisture raw materials.

The sample collector 4 is provided with a discharge port for discharging a common coal sample, and the discharge port is connected with the feed port of the first shrinking device 6 . Optionally, the feed inlet of the first shrinking device 6 can be directly arranged below the discharge port of the sample collector 4, and the shared coal sample processed by the sample collector 4 can directly enter the first shrinking device under the action of gravity. The divider 6 is used for the preparation of the test total moisture.

It can be understood that in the process of coal sample transportation, the way of direct connection between the outlet of the previous link and the inlet of the next link is usually not used for material transfer, so it can be set to transport the shared coal sample to the first The conveying device of the shrinking device 6, the conveying device connects the material inlet of the first shrinking device 6 and the material outlet of the sample collector 4.

Under the action of the conveying device, the preliminarily processed coal sample is transported from the outlet of the sample collector 4 to the inlet of the first shrinker 6 for subsequent shrinkage treatment.

Optionally, in order to facilitate the transportation of the common coal sample, the conveying device includes a conveyor belt 5, one end of which is arranged below the outlet of the sample collector 4, and the other end is arranged above the inlet of the first shrinker 6 . The conveying device can also be equipment such as a conveying trolley.

Specifically, when transporting coal samples, a conveyor belt 5 such as a transfer belt can be used to transport the coal samples. Coal sample; the end is set above the feed inlet of the first splitter 6 .

After the common coal sample falls on the surface of the conveyor belt 5, it moves under the drive of the conveyor belt 5. When the coal sample is transported to the end of the conveyor belt 5, the coal sample falls and can directly enter the first shrinker through the lower feeding port. 6.

Further, on the basis of the above embodiments, in order to reduce the sample volume of the coal sample after reduction, the first reducer 6 includes a second reducer.

When testing the moisture content, usually not too many coal samples are needed as test samples, and the moisture content of the coal sample can be measured with a small amount of samples. Specifically, the first shrinkage device 6 includes at least two shrinkage devices for reducing the coal sample, and the inlet of the first shrinkage device is connected with the discharge port of the sample collector 4 for receiving the prepared The common coal sample, and the first shrinkage treatment.

The feed inlet of the second shrink divider is connected with the discharge outlet of the first shrink divider, and the second shrinkage treatment is performed on the test full water sample. The test full water sample that finally enters the online full moisture test system 9 is the coal sample processed by multiple shrinkers.

Through the two-stage reduction method, on the basis of ensuring that the water content of the coal sample can be accurately measured, the quality of the whole water sample is reduced, which saves the coal sample and improves the test efficiency.

It can be understood that other shrinkers in this application include shrinkers that can perform multiple shrinkage processes.

Optionally, in order to prevent the online total moisture testing system 9 from failing to measure the total moisture of the coal sample, on the basis of any of the above-mentioned embodiments, the first shrinker 6 can be used to prepare a spare full water sample, and there is a utility In the second outlet 7 for discharging the backup full water sample.

Specifically, if the online full moisture testing system 9 breaks down, the full test water sample may not be taken out, or the water content of the full test water sample will be greatly lost after taking out, resulting in the inability to accurately measure the water content of the coal sample.

Therefore, while preparing the full water sample for testing, the first splitter 6 prepares a part of the coal sample as a spare full water sample, and separately sets the second outlet 7 for discharging the spare full water sample. After the preparation of the spare whole water sample is completed, put it into a container such as a sealed bottle for storage. When the test full water sample cannot be used, measure the moisture content of the spare full water sample to ensure the normal progress of the moisture content determination of the coal sample.

Further, in order to realize the determination of the analysis sample and realize the integration of the collection and production of the coal sample, on the basis of any one of the above-mentioned embodiments, it also includes an analysis sample testing system, the first reducer 6 can be used to prepare the analysis sample, and the second A divider 6 is provided with a third outlet 8 for outputting the analysis sample, and the third outlet 8 is connected with the analysis sample testing system.

Concretely, while the first shrinker 6 is preparing the whole water sample for testing, it can also prepare analysis samples for measuring ash content, fixed carbon content and other indicators, and the first shrinker 6 is provided with a third outlet for discharging the analysis samples. exit 8. The third outlet 8 is connected to the analysis sample testing system, so that the online measurement of various indicators of the analysis sample can be realized.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The online sample preparation and testing system provided by the present invention has been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (7)

1. An on-line sample preparation and testing system, comprising a sampling unit that primary sub-sample is prepared into a common coal sample, is characterized in that, also includes: The first shrinking device (6), its feed inlet is connected with the discharge port of the sampling unit, and is used for shrinking the shared coal sample to prepare the whole water sample for testing, the first shrinking device ( 6) It is provided with a first outlet for discharging the whole water sample for the test; An online total moisture testing system (9), used to collect the test full water sample and perform a moisture content test, the online total moisture testing system (9) is connected to the first outlet. 2. The on-line sample preparation and testing system according to claim 1, characterized in that, the sampling unit comprises a second reducer (11) that divides the primary sub-sample to prepare a common sub-sample and is connected to the The outlet of the second shrinkage device (11), the sample collector (4) for collecting the shared sub-sample to form a shared coal sample, the discharge port of the sample collector (4) is connected to the first shrinkage The feed port of the divider (6) is connected. 3. The online sample preparation and testing system according to claim 2, characterized in that, it also comprises a transfer device for transporting the shared coal sample to the first shrinker (6), and the transfer device Connect the feed port of the first shrinking device (6) with the discharge port of the sample collector (4). 4. The online sample preparation and testing system according to claim 3, characterized in that, the conveying device comprises a conveyor belt (5), and one end of the conveyor belt (5) is arranged at the discharge port of the sample collector (4). Below the opening, the other end is located above the feed opening of the first shrinker (6). 5. The online sample preparation and testing system according to claim 4, characterized in that, the first reducer (6) comprises a secondary reducer. 6. The on-line sample preparation and testing system according to any one of claims 1 to 5, characterized in that, the first shrinkage device (6) can be used to prepare a spare full water sample, and is provided for discharging the Second outlet (7) for spare full water sample. 7. The online sample preparation and testing system according to claim 6, further comprising an analytical sample testing system, the first shrinking device (6) can be used to prepare an analytical sample, and the first shrinking The device (6) is provided with a third outlet (8) for discharging the analysis sample, and the third outlet (8) is connected with the analysis sample testing system.